DISPLAY DEVICE
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`CROSS-REFERENCE TO RELATED APPLICATION(S)
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`[0001] This application claims priority to and the benefit of Korean Patent Application No. 10-
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`2021-0189589 under 35 U.S.C. § 119, filed on December 28, 2021, in the Korean Intellectual
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`Property Office (KIPO), the disclosure of which is incorporated by reference herein in its
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`entirety.
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`1. Technical Field
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`BACKGROUND
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`[0002] The disclosure relates to a display device, and moreparticularly, it relates to a display
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`device in which an optical element such as a camera and the like can be positioned in a rear
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`side of a display area.
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`2. Description of the Related Art
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`[0003] A display device is a display displaying a screen, and may include a liquid crystal
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`display (LCD), an organic light emitting diode (OLED) display, and the like. The display
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`device is used in various electronic devices such as portable phones, navigation devices, digital
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`cameras, electronic books, portable game devices, or various terminals.
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`[0004] In particular, in small electronic devices such as portable phones, optical elements such
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`as cameras and optical sensors are formed in the peripheral area, but the size of the display
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`screen is increased and the size of the peripheral area is gradually reduced, and thus a
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`technology that can place the camera or optical sensor on the rear side of the display area has
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`been studied and developed.
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`[0005] The above information disclosed in this Background section is only for enhancementof
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`understanding of the backgroundof the disclosure, and therefore it may contain information
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`that does not form the prior art that is already knownin this country to a person of ordinary
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`skill in the art.
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`SUMMARY
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`[0006] Embodiments are to provide a display device with improved display quality by
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`reducing light reflection by an electrode of a metallic material while positioning an optical
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`element such as a camera or an optical sensor on a rear surface of a light transmissive area of
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`a display area.
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`For example, embodiments are to provide a display device in which
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`unnecessary reflection is reduced by a low reflection layer disposed on a light transmissive
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`area even whenan optical element such as a camera or an optical sensor is positioned on the
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`rear surface of the light transmissive area of the display area.
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`[0007] A display device according to an embodiment may include:a first display area that
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`includesa first pixel circuit portion andafirst light emitting elementelectrically connected
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`with thefirst pixel circuit portion; a 2-1 display area that includes a 2-1 pixel circuit portion, a
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`2-1 light emitting elementelectrically connected with the 2-1 pixel circuit portion, and a 2-2
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`pixel circuit portion; and a 2-2 display area that includes a 2-2 light emitting element
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`electrically connected with the 2-2 pixel circuit portion, and a light transmissive area. The
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`first pixel circuit portion of the first display area may be disposed lower than thefirst light
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`emitting element in a cross-sectional view, and the 2-1 pixel circuit portion of the 2-1 display
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`area may be disposed lowerthanthe 2-1 light emitting elementin a cross-sectional view. The
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`2-2 light emitting element may includea first electrode disposed in the 2-2 display area, an
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`emission layer disposed in the 2-2 display area, and a second electrode disposed in the 2-2
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`display area, and the 2-2 display area may includea low reflective layer that overlapsthefirst
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`electrode in a plan view.
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`[0008] The low reflective layer may contact the first electrode.
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`[0009] The low reflective layer may contact a bottom surface of the first electrode.
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`[0010] The low reflective layer may include at least one of metal, metal oxide, inorganic
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`material, and amorphoussilicon.
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`[0011] The low reflective layer may includeat least one of molybdenum, molybdenum oxide,
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`molybdenum tantalum oxide, molybdenum titanium oxide, silicon oxide, silicon nitride,
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`silicon oxynitride, and amorphoussilicon.
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`[0012] A reflectance of the low reflective layer may be lower than a reflectance of the first
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`electrode.
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`[0013] A thickness of the low reflective layer may be in a range of about 50 angstromsto about
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`800 angstroms.
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`[0014] The low reflective layer may includea first sub-low reflective layer and a second sub-
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`low reflective layer that are sequentially stacked each other.
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`[0015] The low reflective layer may further include a third sub-low reflective layer disposed
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`on the second sub-low reflective layer.
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`[0016] A thickness of thefirst sub-low reflective layer may be in a range of about 10 angstroms
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`to about 700 angstroms, and a thickness of the second sub-low reflective layer may be in a
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`range of about 50 angstroms to about 800 angstroms.
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`[0017] A thicknessof the third sub-low reflective layer may be in a range of about 50 angstroms
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`to about 300 angstroms.
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`[0018] The 2-2 pixel circuit portion and the first electrode may be electrically connected
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`through a transparent connection wire.
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`[0019] The transparent connection wire may be disposed throughout the 2-1 display area and
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`the 2-2 display area.
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`[0020] Eachof thefirst light emitting element, the 2-1 light emitting element, and the 2-2 light
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`emitting element may include a function layer disposed between thefirst electrode and the
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`second electrode, and the function layer may be disposed throughout the first display area,
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`the 2-1 display area, and the 2-2 display area.
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`[0021] A display device according to an embodiment may include:a first display area that
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`includesa first pixel circuit portion andafirst light emitting elementelectrically connected
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`with thefirst pixel circuit portion; a 2-1 display area that includes a 2-1 pixel circuit portion, a
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`2-1 light emitting elementelectrically connected with the 2-1 pixel circuit portion, and a 2-2
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`pixel circuit portion; and a 2-2 display area that includes a 2-2 light emitting element
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`electrically connected with the 2-2 pixel circuit portion, a light transmissive area, and a low
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`reflective layer. The 2-2 light emitting element may includeafirst electrode, an emission
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`layer, and a second electrode. A reflectance of the low reflective layer may be lower than a
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`reflectance of the first electrode.
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`[0022] The 2-2 display area may further include a substrate, an interlayer insulation layer
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`extended from the 2-1 display area, and a transparent connection wire that is disposed on the
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`interlayer insulation layer.
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`[0023] The low reflective layer may include at least one of metal, metal oxide, inorganic
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`material, and amorphoussilicon.
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`[0024] The low reflective layer may includeat least one of molybdenum, molybdenum oxide,
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`molybdenum tantalum oxide, molybdenum titanium oxide, silicon oxide, silicon nitride,
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`silicon oxynitride, and amorphoussilicon.
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`[0025] The low reflective layer may include a first sub-low reflective layer and a second sub-
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`low reflective layer that are sequentially stacked each other.
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`[0026] The low reflective layer may further include a third sub-low reflective layer that is
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`disposed on the second sub-low reflective layer.
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`[0027] According to the embodiments, an optical element such as a camera or an optical sensor
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`may be positioned on the rear surface of the display area, and thusit is possible to display an
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`image on the front surface of the display device. Further, according to the embodiments,it
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`is possible to preventthe light reflected from the optical element from being reflected back in
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`the light transmissive area and appearing as an image by positioning the low-reflective layer
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`in the light transmissive area overlapping the optical element. Accordingly, it is possible to
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`provide a display device with improveddisplay quality.
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`BRIEF DESCRIPTION OF THE DRAWINGS
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`[0028] FIG. 1 is an exploded perspective view of a display device according to an embodiment.
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`[0029] FIG. 2 is a schematic perspective view of a display device according to another
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`embodiment.
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`[0030] FIG. 3 is an enlarged top plan view of somearea of the display device according to an
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`embodiment.
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`[0031] FIG. 4 is an enlarged view of a part of the second display area of the display device.
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`[0032] FIG. 5 is an enlarged view of the second display area of the display device.
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`[0033] FIG. 6 is an enlarged view of a part of the second display area in the display device
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`according to the embodiment.
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`[0034] FIG. 7 is a schematic cross-sectional view ofa first display area.
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`[0035] FIG. 8, FIG. 9, and FIG. 10 are schematic cross-sectional views of somearea of the second
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`display area.
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`[0036] FIG. 11 is a graphillustrating reflectance by wavelength according to embodiments and
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`a comparative example.
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`DETAILED DESCRIPTION OF THE EMBODIMENTS
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`[0037] The disclosure will be described more fully hereinafter with reference to the
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`accompanying drawings, in which embodiments of the disclosure are shown. The disclosure
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`may be implemented in several different forms and is not limited to the embodiments
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`described herein.
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`[0038] The drawings and description are to be regarded asillustrative in nature and not
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`restrictive. Like reference numerals designate like elements throughout the specification.
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`[0039] Since the size and thickness of each component shownin the drawing are arbitrarily
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`indicated for better understanding and ease of description, the disclosure is not necessarily
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`limited thereto.
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`In the drawings, the thickness of layers, films, panels, regions, etc., are
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`exaggerated for clarity.
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`In the drawings, the thickness of layers, films, panels, regions, and
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`the like are exaggerated forclarity.
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`[0040] It will be understood that when an element suchasa layer, film, region, or substrate is
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`referred to as being “on” another element, it can be directly on the other elementor intervening
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`elements may also be present.
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`In contrast, when an elementis referred to as being “directly
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`on” another element, there are no intervening elements present. Further, throughout the
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`specification, the word “on” a target element will be understood to mean positioned above or
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`below the target element, and will not necessarily be understood to mean positioned “at an
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`upperside” based on an opposite to gravity direction.
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`[0041] Unless explicitly described to the contrary, the word “comprise”, and variations such
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`as “comprises” or “comprising”, will be understood to imply the inclusion of stated elements
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`but not the exclusion of any other elements.
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`[0042] Further, throughout the specification, the phrase “in a plan view” means viewing a
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`target portion from the top, and the phrase “on a cross-section” means viewing a cross-section
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`formedby vertically cutting a target portion from theside.
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`[0043] In the specification and the claims, the phrase “at least one of” is intended to include
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`the meaning of “at least one selected from the group of” for the purpose of its meaning and
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`interpretation. For example, “at least one of A and B” may be understood to mean “A, B, or
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`A and B.”
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`[0044] In the specification and the claims, the term “and/or” is intended to include any
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`combination of the terms “and” and “or” for the purpose of its meaning and interpretation.
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`For example, "A and/or B" may be understood to mean "A, B, or A and BB." The terms “and”
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`and “or” may be used in the conjunctive or disjunctive sense and may be understood to be
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`equivalent to “and/or.”
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`[0045] Also, when an elementis referred to as being “in contact” or “contacted” or the like to
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`another element, the element may be in “electrical contact” or in “physical contact” with
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`another element; or in “indirect contact” or in “direct contact” with another element.
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`[0046] Hereinafter, a schematic structure of a display device will be described with reference
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`to FIG. 1.
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`FIG. 1 is an exploded perspective view of a display device according to an
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`embodiment.
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`[0047] Referring to FIG. 1, a display device 1000 according to an embodiment maybe a display
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`displaying motion pictures orstill images, and may be usedas a display screen of various
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`products not only such as portable electronic devices including a mobile phone, a smart phone,
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`a tablet personal computer, a mobile communication terminal, an electronic notebook, an
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`electronic book, a portable multimedia player (PMP), a navigation device, an ultra mobile PC
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`(UMPC), and the like, but also a television, a laptop, a monitor, an advertisement board, the
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`Internet of things (IOT), and the like. The display device 1000 according to the embodiment
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`may be used in a wearable device such as a smart watch, a watch phone, a spectacles type of
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`display, and a head mounted display (HMD). The display device 1000 according to the
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`embodiment may be used as an instrumentpanelof the car, the center fascia of the car or the
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`center information display (CID) disposed on the dashboard, a room mirror display that
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`replaces the side mirror of the car, or a display dispose on the back of the front seat of the car
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`for entertainment.
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`FIG. 1 illustrates a case that the display device 1000 is used as a smart
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`phonefor better comprehension and ease of description.
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`[0048] The display device 1000 may display an image on a display surface that is parallel to
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`each of a first direction DR1 and a second direction DR2 toward a third direction DR3. The
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`display surface on which the image is displayed may correspond to a front surface of the
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`display device 1000 and may correspond to a front surface of a cover window WU.
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`Images
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`may include static images as well as dynamic images.
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`[0049] In the embodiment, the front (or top) and rear (or bottom) of each memberare defined
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`with reference to a direction in which the image is displayed. The front and rear surfaces
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`may be opposite to each otherin the third direction DR3, and the normaldirectionsof the front
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`and rear surfaces may be parallel to the third direction DR3. A separation distance in the
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`third direction DR3 between the front and rear surfaces may correspondto a thickness in the
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`third direction DR3 of a display panel.
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`[0050] The display device 1000 according to the embodiment may detect a user's input applied
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`from the outside. The user's input mayincludevarioustypes of external inputs such asa part
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`of the user's body,light, heat, or pressure. The user's input may be providedin various forms,
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`and the display device 1000 may sense the user's input applied to the side or the rear surface
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`of the display device 1000 accordingto the structure of the display device 1000.
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`[0051] The display device 1000 may include a cover window WU,a housing HM,a display
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`panel DP, and an optical element ES.
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`In the embodiment, the cover window WUandthe
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`housing HM may be combined to form the appearance of the display device 1000.
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`[0052] The cover window WU mayinclude an insulation panel.
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`For example, the cover
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`window WU maybe formed of glass, plastic, or a combination thereof.
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`[0053] The front of the cover window WU maydefine the front of the display device 1000.
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`The transmissive area TA may be an optically transparent region.
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`For example,
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`the
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`transmissive area TA maybe a region having visible ray transmittance of about 90 % or more.
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`[0054] A blocking area BA may define the shape of the transmissive area TA. The blocking
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`area BA maybe adjacentto the transmissive area TA and may surround the transmissive area
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`TA.
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`The blocking area BA may be a region having relatively low light transmittance
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`compared to the transmissive area TA. The blocking area BA may include opaque material
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`that blocks light. The blocking area BA may have a color. The blocking area BA may be
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`defined by a bezel layer provided separately from the transparent substrate defining the
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`transmissive area TA, or may be defined by an ink layer formed by inserting or coloring the
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`transparent substrate.
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`[0055] The display panel DP may display an image and may further include a driver 50. The
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`display panel DP mayincludea front surface including a display area DA and a non-display
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`area PA. The display area DA may be a region in which a pixel operates according to an
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`electrical signal and emits light.
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`[0056] In an embodiment, the display area DA maybe a region in which pixels are included
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`and an image is displayed, and simultaneously a region in which an external input is sensed
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`by a touch sensor positioned on an upperside in the third direction DR3 of the pixel.
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`[0057] The transmissive area TA of the cover window WU mayatleast partially overlap the
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`display area DA of the display panel DP. For example, the transmissive area TA may overlap
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`the front surface of the display area DA or mayoverlap at least a portion of the display area
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`DA. Accordingly, the user may recognize an image through the transmissive area TA or
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`provide external input based on the image. However, the disclosure is not limited thereto.
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`For example, in the display area DA, a region where an imageis displayed and a region where
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`an external input is sensed may be separated from each other.
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`[0058] The non-display area PA of the display panel DP mayatleast partially overlap the
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`blocking area BA of the cover window WU. The non-display area PA may be a region
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`covered by the blocking area BA. The non-display area PA may be adjacent to the display
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`area DA and may surround the display area DA. An image may be notdisplayed in the non-
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`display area PA, and a driving circuit or driving wire for driving the display area DA may be
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`disposed in the non-display area PA. The non-display area PA mayinclude a driver 50, a
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`first non-display area PA1 including a connecting wire and a bending region, and a second
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`non-display area PA2 positioned outside the display area DA.
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`In the embodimentof FIG.1,
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`the second non-display area PA2 may be positioned on three sides of the display area DA, and
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`the first non-display area PA1 may bepositioned on the otherside of the display area DA.
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`[0059] In the embodiment, the display panel DP may be assembledin a flat state in which the
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`display area DA and the non-display area PA face the cover window WU. However, the
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`disclosure is not limited thereto. A part of the non-display area PA of the display panel DP
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`may be bent. A portion of the non-display area PA may face the rear surface of the display
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`device 1000, and thus the blocking area BA shownonthefront surface of the display device
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`1000 may be reduced, and the first non-display area PA1 may be bent to be placed on the rear
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`surface of the display area DA such that the display panel DP is assembled.
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`[0060] The display area DA mayincludea first display area DA1 and a second display area
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`DA2.
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`[0061] In the first display area DA1, multiple light emitting elements, and multiple pixel circuit
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`portions for generating and transmitting a light emitting current to each of the light emitting
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`elements, may be formed. Here, one light emitting element and one pixel circuit portion may
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`be referred to as a pixel PX.
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`In thefirst display area DA1, one pixel circuit portion and one
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`light emitting element may be formed on a one-to-one basis.
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`Thefirst display area DA1 may
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`be hereinafter also referred to as a normaldisplay area.
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`[0062] The second display area DA2 maybe a region in which a componentusing infrared
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`rays, visible rays, sound, andthe like, may be disposed thereunder.
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`[0063] The driver 50 may be mounted onthefirst non-display area PA1, and may be mounted
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`on the bending portion or positioned on one of both sides of the bending portion. The driver
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`50 may be provided in the form of a chip.
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`[0064] The driver 50 may be electrically connected to the display area DA to transmit an
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`electrical signal to the display area DA. For example, the driver 50 may provide data signals
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`to pixels PX disposed in the display areaDA.
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`In another example, the driver 50 may include
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`a touch driving circuit and maybeelectrically connected to a touch sensor disposed in the
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`display area DA.
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`The driver 50 may include various circuits in addition to the above-
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`described circuits or may be designed to provide variouselectrical signals to the display area
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`DA.
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`[0065] The display device 1000 may havea pad portion positioned at the end of the first non-
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`display area PA1, and maybeelectrically connected to a flexible printed circuit board (FPCB)
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`including a driving chip on the pad portion. Here, the driving chip positioned on the flexible
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`printed circuit board may include variousdriving circuits for driving the display device 1000
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`or connectors for power supply. Depending on embodiments, instead of the flexible printed
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`circuit board, a rigid printed circuit board (PCB) may be used.
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`[0066] The optical element ES may be disposed under the display panel DP. The optical
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`element ES may be an electronic element using light or sound.
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`For example, the optical
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`element ES may be a sensor that receives and uses light such as an infrared sensor, a sensor
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`that outputs and senseslight or sound to measure a distance or recognizes a fingerprint, and
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`the like, a small lamp that outputs light, a speaker that outputs sound, and the like.
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`In the
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`case of an electronic element using light, light of various wavelength bands such asvisible
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`light, infrared light, and ultraviolet (UV) light may be used.
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`In other embodiments, the
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`optical element ES may beat least one of a camera, an infrared (IR) camera, a dot projector, an
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`infrared illuminator, and a time-of-flight (ToF) sensor.
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`[0067] The housing HM may be combined with acover window WU. The cover window WU
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`may be disposed on the entire housing HM. The housing HM may be combined with the
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`cover window WUto provide an accommodation space. The display panel DP and the
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`optical element ES may be accommodated in the accommodation space provided between the
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`housing HM and the cover window WU.
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`[0068] The housing HM maycontain a material with relatively high stiffness. For example,
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`the housing HM mayinclude multiple frames and/or plates madeof glass, plastic, or metal,
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`or a combination thereof. The housing HM mayreliably protect the components of the
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`display device 1000 accommodatedin the inner space from external impact.
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`[0069] Hereinafter, a display device 1000 according to another embodiment will be described
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`with reference to FIG. 2.
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`FIG. 2 is a schematic perspective view of a display device according
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`to another embodiment. A description of constituent elements that are the sameas the above-
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`described configuration will be omitted.
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`[0070] In an embodiment of FIG. 2, a foldable display device with a structure in which a
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`display device 1000 may befolded along a folding axis FAXisillustrated.
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`[0071] Referring to FIG. 2, a display device 1000 may be a foldable display device in the
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`embodiment. The display device 1000 may be folded outward or inward with reference to
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`the folding axis FAX.
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`In case of folding at the folding axis FAX as a reference, a display
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`surface of the display device 1000 may be positioned on the outsidein the third direction DR3,
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`and thus images may be displayed in both directions.
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`In case that the folding axis FAX is
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`folded inwardas a reference, the display surface may not be visible from the outside.
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`[0072] In the embodiment, the display device 1000 may include a display area DA and a non-
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`display area PA. The display area DA maybe divided into a 1-1 display area DA1-1, a 1-2
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`display area DA1-2, a second display area DA2, and a folding area FA. The 1-1 display area
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`DA1-1 and the 1-2 display area DA1-2 may be positioned on the left and right sides,
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`respectively, of the folding axis FAX as a reference (or at the center), and the folding area FA
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`may be positioned between the 1-1 display area DA1-1 and the 1-2 display areas DA1-2.
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`In
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`case that the display area DA is folded outward with reference to the folding axis FAX, the 1-
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`1 display area DA1-1 and the 1-2 display area DA1-2 may be positioned on both sides in the
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`third direction DR3, and images maybe displayed in both directions.
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`In case that the display
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`area DAis folded inward with reference to the folding axis FAX, the 1-1 display area DA1-1
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`and the 1-2 display area DA1-2 maynotbe visible from the outside while folded.
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`[0073] Hereinafter, the display area according to the embodiment will be described with
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`reference to FIG. 3 to FIG. 5.
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`FIG. 3 is an enlarged top plan view of somearea of the display
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`device according to an embodiment, FIG.4 is an enlarged view of a part of the second display
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`area of the display device, and FIG. 5 is an enlarged view of the second display area of the
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`display device.
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`[0074] Referring to FIG. 3, the display area DA may be disposed on the entire surface of the
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`display panel DP, and the display area DA may bedividedinto a first display area DA1 and a
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`second display area DA2.
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`In FIG. 3, a structure of the display panel DP below thecut-line is
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`notillustrated, but the first display area DA1 maybe positioned below the cut-line.
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`[0075] An optical element ES, such as a cameraor an optical sensor, may be positioned on the
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`rear side of the display panel DP, and in FIG.3, the optical element ES may be positioned on
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`the rear side and is shownasa dottedline.
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`[0076] The second display area DA2 maybe positioned in front of and aroundthe optical
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`element ES. The second display area DA2 may be dividedinto a 2-1 display area DA2-1 and
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`a 2-2 display area DA2-2.
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`[0077] The 2-2 display area DA2-2 may be a display area positioned on the entire surface of
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`the optical element ES. The 2-2 display area DA2-2 may include multiple light emitting
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`elements and maydisplay an image, but a pixel circuit portion for generating and transmitting
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`a light emitting current to the light emitting elements may be not formed in the 2-2 display
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`area DA2-2 but may be located in an adjacent 2-1 display area DA2-1. The pixel circuit
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`portion positioned in the 2-1 display area DA2-1 andthe light emitting element positioned in
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`the 2-2 display area DA2-2 maybeelectrically connected through a transparent connection
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`wire.
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`In the 2-2 display area DA2-2, a transparent light transmissive area may be formed in
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`a region other than a region where multiple light emitting elements are positioned, and a
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`cameraor optical sensor, whichis the optical element ES, maybe installed on the display panel
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`to shoot or detect an object positioned in front of the display panel DP through the light
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`transmissive area.
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`In FIG. 3, the 2-2 display area DA2-2 is illustrated as a quadrangle.
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`However, the 2-2 display area DA2-2 may have a shape corresponding to a planar shape of
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`the optical element ES, such as a circle, depending on embodiments. Hereinafter, the 2-2
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`display area DA2-2 maybealso referred to as a transparent display area.
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`[0078] The 2-1 display area DA2-1 may be positioned on one side or both sides of the 2-2
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`display area DA2-2, and may be positioned between the first display area DA1 and the 2-2
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`display area DA2-2.
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`In the 2-1 display area DA2-1, one pixel circuit portion and onelight
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`emitting element may be formed one-to-one, and the 2-1 display area DA2-1 may further
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`include a pixel circuit portion for transmitting a light emitting current to the multiple light
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`emitting elements formed in the 2-2 display area DA2-2. Hereinafter, the 2-1 display area
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`DA2-1 maybealso referred to as an intermediate display area.
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`[0079] FIG.3 illustrates an embodimentin whichthe 2-1 display areas DA2-1 are positioned at
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`the left and right of the 2-2 display area DA2-2, and a horizontal width of a single 2-1 display
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`area DA2-1 maybehalf of a horizontal width of the 2-2 display area DA2-2.
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`Thefirst display
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`area DA1 maybe positioned in a region where the 2-1 display area DA2-1 is not positioned,
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`which is a region adjacent to the 2-2 display area DA2-2._ With reference to the 2-2 display
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`area DA2-2, the direction in which the 2-1 display area DA2-1 is positioned may coincide with
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`an extension direction (first direction) of a scan line, which will be described later. A
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`transparent connection wire formed in the second display area DA2 may extend from the 2-1
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`display area DA2-1 to the 2-2 display area DA2-2.
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`[0080] FIG. 4 illustrates an arrangement and a connection structure of a pixel circuit portion
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`anda light emitting elementthat form thefirst display area DA1 (i.e., the normaldisplay area),
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`the 2-1 display area DA2-1 (i.e., the intermediate display area), and the 2-2 display area DA2-
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`2 (i.e., the transparent display area) according to the embodiment.
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`[0081] First, the first display area DA1 (normal display area) may include multiple light
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`emitting elements EDr1, EDg1, and EDb1 (hereinafter also referred to as light emitting
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`elements for a normal display area) and multiple pixel circuit portions PCr1, PCg1, and PCb1
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`(hereinafter also referred to as pixel circuit portions for a normal display area), and they may
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`be formed in the same number.
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`In FIG.4, the pixel circuit portions PCr1, PCg1, and PCb1 of
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`the first display area are simply illustrated as squares having a rectangular shape, and the
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`multiple light emitting elements EDr1, EDg1, and EDb!1are illustrated in a rhombusor
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`octagonal shape, however, the disclosureis not limited thereto. The multiple light emitting
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`elements EDr1, EDg1, and EDb1 may be positioned on a front (or upper side) of each of the
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`connected pixel circuit portions PCr1, PCg1, and PCb1 to overlap the pixel circuit portions
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`PCr1, PCg1, and PCb1 in a plan view. Connecting portions CLr, CLg, and CLb extended
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`from multiple light emitting elements EDr1, EDg1, and EDb!1arealso illustrated to show
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`which multiple light emitting elements EDr1, EDg1, and EDb1areelectrically connected to the
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`pixel circuit portions PCr1, PCg1, and PCb1. The multiple light emitting elements EDr1,
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`EDg1, and EDb1 mayeachincludea first electrode, an emission layer, and a second electrode.
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`The planar shape of the light emitting element is not limited to the shape of a rhombus or
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`hexagon shownin FIG. 4, and it may have various shapes such asa circle and a hexagon.
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`Here, the connecting portions CLr, CLg, and CLb may be formed of a transparent conductive
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`material or may be formed of a non-transparent conductive material such as metal.
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`[0082] In the embodiment of FIG. 4, four pixels are used as unit pixels and are arranged
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`repeatedly. Four pixels forming one unit pixel may be formed of one red pixel, one blue pixel,
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`and two green pixels. However, depending on embodiments, at least one red pixel, at least
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`one green pixel, and at least one blue pixel may be included.
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`In the embodiment shown in
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`FIG. 4, the positions of red light emitting elements EDr1 and bluelight emitting elements EDb1
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`are changed for each row. However, numerous variations are possible in the number and
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`arrangementof pixels or light emitting elements.
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`[0083] In the second display area DA2, multiple pixel circuit portions PCr2-1, PCr2-2, PCg2-1,
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`PCg2-2, PCb2-1, and PCb2-2 and multiple light emitting elements EDr2-1, EDg2-1, and EDb2-
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`1 maybepositioned in the 2-1 display area DA2-1 (intermediate display area). The multiple
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`pixel circuit portions PCr2-1, PCr2-2, PCg2-1, PCg2-2, PCb2-1, and PCb2-2 of the 2-1 display
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`area DA2-1 (intermediate display area) may be divided into pixel circuit portions PCr2-1,
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`PCg2-1, and PCb2-1 for the 2-1 display area (hereinafter, also referred to as pixel circuit
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`portions for the intermediate display area) and pixel circuit portions PCr2-2, PCg2-2, and
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`PCb2-2 for the 2-2 display area (hereinafter, also referred to as pixel circuit portions for the
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`transparent display area). The pixel circuit portions PCr2-1, PCg2-1, and PCb2-1 for the 2-1
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`display area maybe pixel circuit portions that transmit a light emitting current to multiple
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`light emitting elements EDr2-1, EDg2-1, and EDb2-1 disposed in the 2-1 display area DA2-1
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`(intermediate display area) (also referred to as light emitting elements for the intermediate
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`display area). The pixel circuit portions PCr2-1, PCg2-1, and PCb2-1 for the 2-1 display area
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`and the light emitting elements EDr2-1, EDg2-1, and EDb2-1 for the 2-1 display area may
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`correspond one-to-one.
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`[0084] Althoughthe pixel circuit portions PCr2-2, PCg2-2, and PCb2-2 for the 2-2 display area
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`are positioned in the 2-1 display area DA2-1 (intermediate display area), they may generate a
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`light emitting current to be transmitted to the light emitting elements EDr2-2, EDg2-2, and
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`EDb2-2 for the 2-2 display area disposed in the 2-2 display area DA2-2 (transparent