(19) United States
`(12) Patent Application Publication (10) Pub. No.: US 2006/0092348 A1
`(43) Pub. Date:
`May 4, 2006
`Park
`
`US 20060092348A1
`
`(54) BACKLIGHT UNIT AND LIQUID CRYSTAL
`DISPLAY WITH THE SAME
`
`(75) Inventor: Hee Jeong Park, Bucheon-si (KR)
`Correspondence Address:
`BRCH STEWART KOLASCH & BRCH
`PO BOX 747
`FALLS CHURCH, VA 22040-0747 (US)
`(73) Assignee: LG, Philips LCD Co., Ltd.
`(21) Appl. No.:
`11/258,954
`(22) Filed:
`Oct. 27, 2005
`
`(30)
`
`Foreign Application Priority Data
`
`Oct. 30, 2004 (KR)............................ 10-2004-0087582
`
`Publication Classification
`
`(51) Int. Cl.
`(2006.01)
`GO2F L/335
`(52) U.S. Cl. ................................................................ 349/64
`
`(57)
`
`ABSTRACT
`
`Abacklight unit and a liquid crystal display device including
`Such a backlight unit are provided. According to an embodi
`ment, there is provided a backlight unit comprising a plu
`rality of light emitting diodes (LEDs) for generating light, a
`printed circuit board (PCB) for controlling the LEDs, a
`transparent scattering plate provided with a scattering opti
`cal pattern for scattering the light from the LEDs, and a
`diffusing plate for diffusing the light scattered by the scat
`tering plate.
`
`100
`
`119
`
`
`
`2 2 116
`
`115
`
`Y
`
`N
`
`114
`113
`2
`12
`
`
`
`
`
`
`
`
`
`SEC et al. v. MRI
`SEC Exhibit 1026.001
`IPR 2023-00199
`
`

`

`Patent Application Publication May 4, 2006 Sheet 1 of 2
`
`US 2006/0092348A1
`
`Fig. 1
`Related Art
`
`1.
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`SEC et al. v. MRI
`SEC Exhibit 1026.002
`IPR 2023-00199
`
`

`

`Patent Application Publication May 4, 2006 Sheet 2 of 2
`
`US 2006/0092348A1
`
`Fig. 3
`
`119 Z."
`
`115
`
`
`
`
`
`113
`2
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`Fig. 4
`
`200
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`2
`
`SEC et al. v. MRI
`SEC Exhibit 1026.003
`IPR 2023-00199
`
`

`

`US 2006/0092.348 A1
`
`May 4, 2006
`
`BACKLIGHT UNIT AND LIQUID CRYSTAL
`DISPLAY WITH THE SAME
`0001. This application claims priority under 35 U.S.C.
`S119 on Patent Application No. 10-2004-0087582 filed on
`Oct. 30, 2004 in the Republic of Korea, the entire contents
`of which are hereby incorporated by reference.
`
`BACKGROUND OF THE INVENTION
`0002) 1. Field of the Invention
`0003. The present invention relates to a backlight unit
`that can reduce light losses that may be caused by leakage
`of the light to an external side. The present invention further
`relates to a liquid crystal display (LCD) with such a back
`light unit.
`0004 2. Description of the Related Art
`0005. In recent years, an LCD has increasingly gained
`attention as a flat display device that varies optical anisot
`ropy by applying an electric field to liquid crystal having a
`fluidity property as well as a crystal optical property. Since
`the LCD is relatively slim, with low electric consumption
`and capability of being made in a large-sized display panel
`with a high definition, it has been widely used.
`0006 Generally, such an LCD has a liquid crystal panel
`that displays a desired image on a screen by adjusting an
`amount of light fed from a backlight unit. The liquid crystal
`panel includes a plurality of liquid crystal cells arranged in
`a matrix pattern and a plurality of control Switches for
`converting video signals that are to be fed to the liquid
`crystal cells.
`0007. In order to reduce a thickness of the LCD, the
`backlight unit used for the LCD has been made slimmer and
`light-weight. To accomplish this, a light emitting diode
`(LED) instead of CCFL has been used for the backlight unit
`since the light emitting diode is favorable in an electric
`power consumption, weight and brightness.
`0008 FIG. 1 is a sectional view of a related art liquid
`crystal display with an LED backlight unit and FIG. 2 is a
`view illustrating a light emission from a related art side
`emitter type LED.
`0009. As shown in FIG. 1, a related art liquid crystal
`display 1 includes a liquid crystal panel 19 having upper and
`lower substrates between which liquid crystal disposed and
`a backlight unit feeding light to the liquid crystal panel 19.
`0010. The backlight unit includes a plurality of LEDs 14,
`a metal core printed circuit board (MCPCB) 12 disposed
`under the plurality of the LEDs 14, a scattering plate 15
`formed of polymethylmethacrylate (PMMA) to scatter the
`light generated from the LEDs 14, and a diffusing plate 16
`for diffusing the light that has passed through the scattering
`plate 15. A variety of optical sheets 17 are disposed on the
`diffusing plate 16. A reflecting plate 13 is disposed between
`the LEDs 14 and the MCPCB 12 for reflecting light, which
`cannot transmit the diffusing plate 16 but is directed toward
`the MCPCB 12, toward the scattering plate 15.
`0011. The LEDs 14 are point light sources that emit red,
`green and blue lights. The MCPCB 12 is provided with a
`circuit for controlling the LEDs 14, and has relatively high
`heat dissipation property as compared with a conventional
`
`PCB. The MCPCB 12 functions to support the LEDs 14 as
`well as to control the light emission of the LEDs 14 using the
`circuit formed thereon.
`0012. A scattering optical pattern (not shown) is formed
`on a rear surface of the scattering plate 15. As shown in FIG.
`2, the side emitting type LED 14 is designed to emit the light
`in a side direction rather than a vertical direction. However,
`in order to prevent the bright dot with respect to the light
`emitted in the vertical direction, the scattering plate 15 is
`provided to scatter the light as much as possible, thereby
`improving the brightness uniformity.
`0013 The diffusing plate 16 is spaced apart from the
`LEDs 14 at a predetermined distance so as to allow the light
`from the scattering plate 15 to have a more uniform distri
`bution.
`0014. The reflecting plate 13 reflects the light that is
`reflected from the scattering plate 15 and/or the diffusing
`plate 16 and directed thereto or the light directly from the
`LEDs 14, thereby reducing the light loss.
`0015. In the above-described LCD 1, the light generated
`from the LEDs 14 is consecutively advanced to the scatter
`ing plate 15 and the diffusing plate 16, thereby providing the
`light having a uniform brightness to the liquid crystal panel
`19.
`0016. As described above, the scattering plate 15 is
`formed of the PMMA to uniformly scatter the light gener
`ated from the LEDs 14. The PMMA is not transparent.
`0017. However, since the scattering plate formed of the
`PMMA has properties of a high coefficient of linear expan
`sion and a low heat deformation temperature, it may be
`easily deformed under a high temperature/humidity envi
`rOnment.
`0018. The deformation of the scattering plate deteriorates
`the reliability of the backlight unit and thus the LCD.
`0019 Furthermore, the scattering plate formed of the
`PMMA cannot completely scatter the light generated in a
`vertical direction of the LEDs, thereby causing the poor
`bright spot.
`
`SUMMARY OF THE INVENTION
`0020. Accordingly, the present invention is directed to a
`backlight unit/device and an LCD with the backlight unit,
`which substantially obviate one or more problems due to
`limitations and disadvantages of the related art.
`0021. An object of the present invention is to provide a
`backlight unit that has a scattering plate formed of tempered
`glass, thereby improving light transmission and reliability of
`an LCD even under high temperature/humidity environ
`mentS.
`0022. Another object of the present invention is to pro
`vide a backlight unit in which a scattering plate is omitted,
`thereby reducing the manufacturing costs and thickness of
`an LCD.
`0023. Another object of the present invention is to pro
`vide an LCD having one of Such backlight units.
`0024. Additional advantages, objects, and features of the
`invention will be set forth in part in the description which
`follows and in part will become apparent to those having
`
`SEC et al. v. MRI
`SEC Exhibit 1026.004
`IPR 2023-00199
`
`

`

`US 2006/0092.348 A1
`
`May 4, 2006
`
`ordinary skill in the art upon examination of the following
`or may be learned from practice of the invention. The
`objectives and other advantages of the invention may be
`realized and attained by the structure particularly pointed out
`in the written description and claims hereof as well as the
`appended drawings.
`0.025 To achieve these objects and other advantages and
`in accordance with the purpose of the invention, as embod
`ied and broadly described herein, there is provided a back
`light unit comprising a plurality of light emitting diodes
`(LEDs) for generating light, a printed circuit board (PCB)
`for controlling the LEDs, a transparent scattering plate
`provided with a scattering optical pattern for scattering the
`light from the LEDs, and a diffusing plate for diffusing the
`light scattered by the scattering plate.
`0026.
`In another aspect of the present invention, there is
`provided a liquid crystal display device comprising a liquid
`crystal panel having upper and lower Substrates between
`which a liquid crystal layer is formed, a plurality of light
`emitting diodes (LEDs) for generating light, a printed circuit
`board (PCB) for controlling the LEDs, a transparent scat
`tering plate provided with a scattering optical pattern for
`scattering the light from the LEDs, and a diffusing plate for
`diffusing the light scattered by the scattering plate ad direct
`ing the diffused light towards the liquid crystal panel.
`0027. In still yet another aspect of the present invention,
`there is provided a backlight unit comprising a plurality of
`light emitting diodes (LEDs) for generating light, a printed
`circuit board (PCB) for controlling the LEDs, and a diffusing
`plate having a diverter for scattering the light generated from
`the LEDs.
`0028. In still another aspect of the present invention,
`there is provided a liquid crystal display device comprising
`a liquid crystal panel having upper and lower Substrates
`between which a liquid crystal layer is formed, a plurality of
`light emitting diodes (LEDs) for generating light, a printed
`circuit board (PCB) for controlling the LEDs, and a diffusing
`plate having a diverter for scattering the light generated from
`the LEDs, wherein the diffusing plate diffuses the scattered
`light and directs the diffused light towards the liquid crystal
`panel.
`0029. In still yet another aspect of the present invention,
`there is provided a backlight device for a display panel, the
`device comprising a plurality of light emitting diodes
`(LEDs) configured to generate light, a scattering plate made
`of glass and disposed above the LEDs, the scattering plate
`having a scattering pattern thereon to scatter the light from
`the LEDs, and a diffusing plate disposed above the scattering
`plate with a gap between the diffusing plate and the scat
`tering plate and configured to diffuse the scattered light and
`to direct the diffused light towards the display panel.
`0030. In still yet another aspect of the present invention,
`there is provided a backlight device for a display panel, the
`device comprising a plurality of light emitting diodes
`(LEDs) configured to generate light, and a diffusing plate
`disposed above the LEDs, and including a structure for
`scattering the light from the LEDs, wherein the scattering
`structure is attached on a Surface of a portion of the diffusing
`plate, and the diffusing plate diffuses the scattered light and
`directs the diffused light towards the display panel.
`0031. It is to be understood that both the foregoing
`general description and the following detailed description of
`
`the present invention are exemplary and explanatory and are
`intended to provide further explanation of the invention as
`claimed.
`
`BRIEF DESCRIPTION OF THE DRAWINGS
`0032. The accompanying drawings, which are included
`to provide a further understanding of the invention and are
`incorporated in and constitute a part of this application,
`illustrate embodiment(s) of the invention and together with
`the description serve to explain the principle of the inven
`tion. In the drawings:
`0033 FIG. 1 is a sectional view of a related art LCD with
`an LED backlight unit;
`0034 FIG. 2 is a view illustrating a light emission from
`a related art side emitter type LED;
`0035 FIG. 3 is a sectional view of an LED with an LED
`backlight unit according to a first embodiment of the present
`invention; and
`0.036 FIG. 4 is a sectional view of an LED with an LED
`backlight unit according to a second embodiment of the
`present invention.
`
`DETAILED DESCRIPTION OF THE
`PREFERRED EMBODIMENTS
`0037 Reference will now be made in detail to the pre
`ferred embodiments of the present invention, examples of
`which are illustrated in the accompanying drawings. Wher
`ever possible, the same reference numbers will be used
`throughout the drawings to refer to the same or like parts.
`
`First Embodiment
`0038 FIG.3 shows an LCD with a backlight unit accord
`ing to a first embodiment of the present invention.
`0039) Referring to FIG. 3, an LCD 100 of this embodi
`ment includes a liquid crystal panel 119 having an upper
`substrate on which red, green and blue color filter layers and
`a black matrix are formed and a lower substrate on which
`pixel electrodes and thin film transistors (TFTs) are formed,
`and a backlight unit for Supplying light to the liquid crystal
`panel 119. A liquid crystal layer is formed between the upper
`and lower substrates of the liquid crystal panel 119.
`0040. The backlight unit includes a transparent scattering
`plate 115 formed of tempered glass to scatter the light
`generated from a plurality of LEDs 114, and a diffusing plate
`116 for diffusing the light that has passed through the
`scattering plate 115. A variety of optical sheets 117 are
`disposed on the diffusing plate 116. A reflecting plate 113 is
`disposed between the LEDs 114 and a MCPCB 112 for
`reflecting light, which is directed toward the MCPCB 112,
`toward the scattering plate 115.
`0041. The LEDs 114 are point light sources that emit red,
`green and blue lights, and can be the side emitting type or
`other types.
`0042. The MCPCB 112 includes one or more circuits for
`controlling the LEDs 114. An electrode unit may be formed
`on the circuit(s) of the MCPCB 112 to transmit control
`signals to the LEDs 114 and support the LEDs 114. There
`fore, the MCPCB 112 controls the light emission of the
`LEDs 114 using the circuit(s) and the electrode unit(s).
`
`SEC et al. v. MRI
`SEC Exhibit 1026.005
`IPR 2023-00199
`
`

`

`US 2006/0092.348 A1
`
`May 4, 2006
`
`0043. A scattering optical pattern (not shown) is formed
`on a rear surface of the scattering plate 115 formed of the
`tempered glass to Scatter the light generated in a vertical
`direction of the side emitting type LEDs 114. The scattering
`optical pattern can be formed by dotting a Surface Scattering
`material on the transparent scattering plate 115 and can
`correspond to the locations of the LEDs 114.
`0044 Alternatively, as shown in FIG. 4, a diverter (120)
`having a plate formed of PMMA, acryl, or glass, on which
`the scattering material is dotted, may be attached at the
`location of the scattering optical pattern on the scattering
`plate 115 to scatter the light emitted in the vertical direction
`from the LEDs 114. That is, the diverter attached to the
`scattering plate 115 can function as a scatter pattern/means
`to Scatter the light.
`0045. As a result, formulation of poor bright dots on the
`liquid crystal panel by the light generated in the vertical
`direction of the side emit type LEDs 114 can be effectively
`prevented in the first embodiment.
`0046 That is, when the light emitted in the vertical
`direction is scattered by the transparent scattering plate 115,
`formation of poor bright dot can be prevented, thereby
`providing a uniform brightness.
`0047. Furthermore, since the transparent scattering plate
`115 formed of the tempered glass has properties of a low
`coefficient of linear expansion and a high heat deformation
`temperature, the scattering plate 115 is not easily deformed
`even in high temperature/humidity environments.
`0.048. The diffusing plate 116 is spaced apart from the
`LEDs 114 at a predetermined distance so as to allow the light
`from the scattering plate 115 to have the uniform distribu
`tion.
`0049. The reflecting plate 113 reflects the light that is
`reflected from the scattering plate 115 and/or the diffusing
`plate 116 and directed thereto or the light directly from the
`LEDs 114, thereby reducing the light loss.
`0050. The reflecting plate 113 is formed by attaching a
`reflecting sheet formed in the form of an adhering sheet on
`the MCPCB 112. At this point, the reflecting sheet is coated
`with acryl or polyester solution.
`0051. In the above-described LCD 100, the light gener
`ated from the LEDs 114 are consecutively advanced to the
`scattering plate 115 and the diffusing plate 116. The light
`directed to the MCPCB 112 without being transmitted
`through the scattering plate 115 and the diffusing plate 116
`is reflected toward the scattering plate 115 and the diffusing
`plate 116 by the reflecting plate 113.
`0.052 As described above, according to the first embodi
`ment of the present invention, by changing the material of
`the scattering plate from the PMMA to the tempered glass,
`the transmission rate and the reliability of the LCD can be
`improved.
`
`Second Embodiment
`0053 FIG. 4 shows an LCD with a backlight unit accord
`ing to a second embodiment of the present invention.
`0054 Since an LCD of this embodiment is similar to that
`of the first embodiment, only the different parts will be
`described hereinafter.
`
`0055 Referring to FIG. 4, a backlight unit for supplying
`light to a liquid crystal panel 119 includes a diffusing plate
`116 for diffusing the light emitted from a plurality of LEDs
`114, a diverter 120 disposed on a rear surface of the diffusing
`plate 116 to scatter the light emitted in the vertical direction,
`an optical sheet 117 disposed between the liquid crystal
`panel 119 and the diffusing plate 116, and a reflecting plate
`113 disposed between the LEDs 114 and the MCPCB 112 for
`reflecting the light, which is directed toward the MCPCB
`112, toward the liquid crystal panel 119.
`0056. The LEDs 114 are point light sources that emit red,
`green and blue lights, and can be side emitting type or other
`types.
`0057 The diverter 120 having one or more smaller plates
`formed of PMMA, acryl (e.g., transparent acryl), or glass
`(e.g., transparent tempered glass), on which the scattering
`material is dotted, is attached on a rear Surface of the
`diffusing plate 116. There, the diverter 120 can be selectively
`located on only certain portions of the rear surface of the
`diffusing plate 116 to correspond with the locations of the
`LEDs 114 as shown in FIG. 4, but can be provided in
`different patterns and/or manner as desired. When the
`diverter 120 is formed of the acryl or glass, the transmission
`rate can be enhanced.
`0058. In this second embodiment, since the scattering
`plate 115 used for scattering the light generated from the
`diffusing plate 116 is omitted and instead the diffusing plate
`116 is designed to diffuse and scatter the light, the number
`of parts and thickness of the backlight unit can be reduced.
`Furthermore, the omission of the separate scattering plate
`enhances the brightness of the LCD.
`0059. In the first and second embodiments, the liquid
`crystal panel 119 includes the upper and lower substrates, a
`liquid crystal layer therebetween, and other conventional
`components of a liquid crystal panel Such as pixel units,
`color filters, etc. Also, although the MCPCB 112 is used,
`other types of PCBs or circuit substrate may be used.
`0060 According to the first embodiment of the present
`invention, since the backlight unit has a transparent scatter
`ing plate formed of tempered glass, a light transmission rate
`and reliability of the LCD can be improved even in high
`temperature/humidity environments.
`0061
`Furthermore, since the scattering plate may be
`omitted from the backlight unit and the diffusing plate is
`designed to perform the function of the scattering plate
`according to the second embodiment of the present inven
`tion, the manufacturing cost and thickness of the backlight
`unit can be reduced.
`0062. It will be apparent to those skilled in the art that
`various modifications and variations can be made in the
`present invention. Thus, it is intended that the present
`invention covers the modifications and variations of this
`invention provided they come within the scope of the
`appended claims and their equivalents.
`
`What is claimed is:
`1. A backlight unit comprising:
`a plurality of light emitting diodes (LEDs) for generating
`light;
`a printed circuit board (PCB) for controlling the LEDs;
`
`SEC et al. v. MRI
`SEC Exhibit 1026.006
`IPR 2023-00199
`
`

`

`US 2006/0092.348 A1
`
`May 4, 2006
`
`a transparent scattering plate provided with a scattering
`optical pattern for scattering the light from the LEDs;
`and
`a diffusing plate for diffusing the light scattered by the
`Scattering plate.
`2. The backlight unit according to claim 1, further com
`prising:
`a reflecting plate for reflecting light directed toward the
`PCB.
`3. The backlight unit according to claim 1, wherein the
`scattering optical pattern is formed on a rear Surface of the
`transparent scattering plate, and corresponds to the LEDs.
`4. The backlight unit according to claim 2, wherein the
`reflecting plate is formed of acryl or polyester.
`5. The backlight unit according to claim 1, wherein the
`scattering optical pattern is formed by dotting a scattering
`material on the scattering plate.
`6. The backlight unit according to claim 1, wherein the
`scattering plate is formed of tempered glass.
`7. The backlight unit according to claim 1, wherein the
`scattering optical pattern is designed to Scatter light emitted
`in a vertical direction of the LEDs.
`8. The backlight unit according to claim 1, wherein the
`PCB is a metal core printed circuit board (MCPCB).
`9. A liquid crystal display device comprising:
`a liquid crystal panel having upper and lower Substrates
`between which a liquid crystal layer is formed:
`a plurality of light emitting diodes (LEDs) for generating
`light;
`a printed circuit board (PCB) for controlling the LEDs;
`a transparent scattering plate provided with a scattering
`optical pattern for scattering the light from the LEDs;
`and
`a diffusing plate for diffusing the light scattered by the
`Scattering plate and directing the diffused light towards
`the liquid crystal panel.
`10. The liquid crystal display device according to claim 9.
`further comprising:
`a reflecting plate for reflecting light directed toward the
`PCB.
`11. The liquid crystal display device according to claim 9.
`wherein the scattering optical pattern is formed on a rear
`Surface of the transparent Scattering plate, and corresponds
`to the LEDs.
`12. The liquid crystal display device according to claim
`10, wherein the reflecting plate is formed of acryl or
`polyester.
`13. The liquid crystal display device according to claim 9.
`wherein the scattering optical pattern is formed by dotting a
`scattering material on the scattering plate.
`14. The liquid crystal display device according to claim 9.
`wherein the scattering plate is formed of tempered glass.
`15. The liquid crystal display device according to claim 9.
`wherein the scattering optical pattern is designed to Scatter
`light emitted in a vertical direction of the LEDs.
`16. The liquid crystal display device according to claim 9.
`wherein the PCB is a metal core printed circuit board
`(MCPCB).
`
`17. A backlight unit comprising:
`a plurality of light emitting diodes (LEDs) for generating
`light;
`a printed circuit board (PCB) for controlling the LEDs;
`and
`a diffusing plate having a diverter for scattering the
`light generated from the LEDs.
`18. The backlight unit according to claim 17, further
`comprising:
`a reflecting plate for reflecting light directed toward the
`PCB.
`19. The backlight unit according to claim 17, wherein the
`diverter is formed on portions of a rear surface of the
`diffusing plate, and corresponds to the LEDs.
`20. The backlight unit according to claim 18, wherein the
`reflecting plate is formed of acryl or polyester.
`21. The backlight unit according to claim 17, wherein the
`diverter includes polymethylmethacrylate (PMMA) plates
`on which a scattering material is dotted, and the PMMA
`plates are attached on a rear Surface of the diffusing plate to
`correspond with the LEDs.
`22. The backlight unit according to claim 17, wherein the
`diverter is formed of tempered glass or a transparent acryl
`plate on which a scattering material is dotted.
`23. The backlight unit according to claim 17, wherein the
`diverter is designed to Scatter light emitted in a vertical
`direction of the LEDs.
`24. The backlight unit according to claim 17, wherein the
`PCB is a metal core printed circuit board (MCPCB).
`25. A liquid crystal display device comprising:
`a liquid crystal panel having upper and lower Substrates
`between which a liquid crystal layer is formed;
`a plurality of light emitting diodes (LEDs) for generating
`light;
`a printed circuit board (PCB) for controlling the LEDs;
`and
`a diffusing plate having a diverter for scattering the light
`generated from the LEDs, wherein the diffusing plate
`diffuses the scattered light and directs the diffused light
`towards the liquid crystal panel.
`26. The liquid crystal display device according to claim
`25, further comprising:
`a reflecting plate for reflecting light directed toward the
`PCB.
`27. The liquid crystal display device according to claim
`25, wherein the diverter is formed on portions of a rear
`surface of the diffusing plate, and corresponds to the LEDs.
`28. The liquid crystal display device according to claim
`26, wherein the reflecting plate is formed of acryl or
`polyester.
`29. The liquid crystal display device according to claim
`25, wherein the diverter includes polymethylmethacrylate
`(PMMA) plates on which a scattering material is dotted, and
`the PMMA plates are attached on a rear surface of the
`diffusing plate to correspond with the LEDs.
`30. The liquid crystal display device according to claim
`25, wherein the diverter is formed of tempered glass or a
`transparent acryl plate on which a scattering material is
`dotted.
`
`SEC et al. v. MRI
`SEC Exhibit 1026.007
`IPR 2023-00199
`
`

`

`US 2006/0092.348 A1
`
`May 4, 2006
`
`31. The liquid crystal display device according to claim
`25, wherein the diverter is designed to scatter light emitted
`in a vertical direction of the LEDs.
`32. The liquid crystal display device according to claim
`25, wherein the PCB is a metal core printed circuit board
`(MCPCB).
`33. A backlight device for a display panel, the device
`comprising:
`a plurality of light emitting diodes (LEDs) configured to
`generate light;
`a scattering plate made of glass and disposed above the
`LEDs, the scattering plate having a scattering pattern
`thereon to scatter the light from the LEDs; and
`a diffusing plate disposed above the scattering plate with
`a gap between the diffusing plate and the scattering
`plate and configured to diffuse the scattered light and to
`direct the diffused light towards the display panel.
`34. The blacklight device according to claim 33, further
`comprising:
`a reflecting plate disposed below the LEDs and configured
`to reflect the light from the LEDs towards the scattering
`plate.
`35. The backlight device according to claim 34, further
`comprising:
`a printed circuit board (PCB) configured to control the
`LEDs and disposed below the reflecting plate.
`
`36. A backlight device for a display panel, the device
`comprising:
`a plurality of light emitting diodes (LEDs) configured to
`generate light; and
`a diffusing plate disposed above the LEDs, and including
`means for scattering the light from the LEDs, wherein
`the scattering means is attached on a surface of a
`portion of the diffusing plate, and the diffusing plate
`diffuses the scattered light and directs the diffused light
`towards the display panel.
`37. The backlight device according to claim 36, wherein
`the scattering means includes a plurality of scattering plates
`attached on portions of the Surface and corresponding to
`locations of the LEDs.
`38. The backlight device according to claim 36, further
`comprising:
`a reflecting plate disposed below the LEDs and configured
`to reflect the light from the LEDs towards the scattering
`plate.
`39. The backlight device according to claim 38, further
`comprising:
`a printed circuit board (PCB) configured to control the
`LEDs and disposed below the reflecting plate.
`
`SEC et al. v. MRI
`SEC Exhibit 1026.008
`IPR 2023-00199
`
`