(12) INTERNATIONAL APPLICATION PUBLISHED UNDER THE PATENT COOPERATION TREATY (PCT)
`
`(19) World Intellectual Property
`Organization
`International Bureau
`
`I IIIII IIIIIIII II IIIIII IIIII IIIII IIIII IIII I II Ill lllll lllll lllll lllll lllll llll 1111111111111111111
`
`( 43) International Publication Date
`21 October 2004 (21.10.2004)
`
`PCT
`
`(10) International Publication Number
`WO 2004/090853 Al
`
`(51) International Patent Classification 7:
`
`G09G3/30
`
`(21) International Application Number:
`PCT /KR2004/000787
`
`(22) International Filing Date:
`
`6 April 2004 (06.04.2004)
`
`(25) Filing Language:
`
`(26) Publication Language:
`
`(30) Priority Data:
`10-2003-0021640
`10-2004-0022553
`
`Korean
`
`English
`
`7 April 2003 (07.04.2003) KR
`1 April 2004 (01.04.2004) KR
`
`(71) Applicant (for all designated States except US): SAM(cid:173)
`SUNG ELECTRONICS CO., LTD. [KR/KR]; 416 Mae(cid:173)
`tan-dong, Yeongtong-gu, Suwon-si, Gyeonggi-do 442-742
`(KR).
`
`(KR). CHAI, Chong-Chnl [KR/KR]; 102-2001 Sam(cid:173)
`sung Apt., Singongdeok-dong, Mapo-gu, Seoul 121-765
`(KR). CHOI, Joon-Hoo [KR/KR]; 108-303 Samho Apt.,
`Youngcheon-dong, Seodaemun-gu, Seoul 120-768 (KR).
`
`(74) Agent: PARK, Young-Woo; 5F., Seil Building, #727-13
`Yoksam-dong, Gangnam-gu, Seoul 135-921 (KR).
`
`(81) Designated States (unless otherwise indicated, for every
`kind of national protection available): AE, AG, AL, AM,
`AT, AU, AZ, BA, BB, BG, BR, BW, BY, BZ, CA, CH, CN,
`CO, CR, CU, CZ, DE, DK, DM, DZ, EC, EE, EG, ES, Fl,
`GB, GD, GE, GH, GM, HR, HU, ID, IL, IN, IS, JP, KE,
`KG, KP, KZ, LC, LK, LR, LS, LT, LU, LV, MA, MD, MG,
`MK, MN, MW, MX, MZ, NA, NI, NO, NZ, OM, PG, PH,
`PL, PT, RO, RU, SC, SD, SE, SG, SK, SL, SY, TJ, TM, TN,
`TR, TT, TZ, UA, UG, US, UZ, VC, VN, YU, ZA, ZM, ZW.
`
`(72) Inventors; and
`(75) Inventors/Applicants (for US only): SHIN, Kyoung-Ju
`[KR/KR]; 102-504 Samjeongseonbi maeul, #289-12,
`Bora-ri, Giheung-eup, Yongin-si, Gyeonggi-do 449-904
`(KR). CHOI, Beohm-Rock [KR/KR]; 112-508 Sam(cid:173)
`sung Apt., Daechi 1-dong, Gangnam-gu, Seoul 135-968
`
`(84) Designated States (unless otherwise indicated, for every
`kind of regional protection available): ARIPO (BW, GH,
`GM, KE, LS, MW, MZ, SD, SL, SZ, TZ, UG, ZM, ZW),
`Eurasian (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM), Euro(cid:173)
`pean (AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, Fl, FR,
`GB, GR, HU, IE, IT, LU, MC, NL, PL, PT, RO, SE, SI, SK,
`
`[Continued on next page}
`
`---iiiiiiiiiiii
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`
`iiiiiiiiiiii - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
`(54) Title: DISPLAY PANEL
`
`- --i
`
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`
`V-Vddg
`
`Dg+l
`
`V-Vddgtl\
`
`Gp-1
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`Q
`(57) Abstract: In an OELD panel capable of decreasing a cross-talk and an OELD apparatus having the OELD panel, a switching
`0
`part is formed in a unit pixel defined by a data line and a scan line to control the output of a data signal in response to a scan signal.
`M A current supply line is disposed on at least two sides of the unit pixel to transfer a current. The sides of the unit pixel are disposed
`0 adjacent to one another. An organic electro luminescent part generates a light in response to the current. A driving part is disposed
`
`H-Vddp
`
`: , between the organic electro luminescent part and the current supply line to control the current in response to the data signal outputted
`;;, from the switching part. Therefore, the current supply line forms a net shape to decrease a cross-talk.
`
`LG Display Co., Ltd.
`Exhibit 1005
`Page 001
`
`

`

`WO 2004/090853 Al
`
`I IIIII IIIIIIII II IIIIII IIIII IIIII IIIII IIII I II Ill lllll lllll lllll lllll lllll llll 1111111111111111111
`
`TR), OAPI (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW,
`ML, MR, NE, SN, TD, TG).
`
`Published:
`-
`with international search report
`
`For two-letter codes and other abbreviations, refer to the "Guid(cid:173)
`ance Notes on Codes and Abbreviations" appearing at the begin(cid:173)
`ning of each regular issue of the PCT Gazette.
`
`LG Display Co., Ltd.
`Exhibit 1005
`Page 002
`
`

`

`WO 2004/090853
`
`PCT /KR2004/000787
`
`DISPLAY PANEL
`
`Technical Field
`
`The present invention relates to a display panel, a method of manufacturing
`
`5
`
`the display panel and a display apparatus having the display panel. More
`
`particularly, the present invention relates to a display panel capable of decreasing a
`
`cross-talk, a method of manufacturing the display panel and a display apparatus
`
`having the display panel.
`
`10 Background Art
`
`A display apparatus may be classified into a cathode ray tube (CRT), a liquid
`
`crystal display (LCD) apparatus, a plasma display panel (PDP), an organic electro
`
`luminescent display (OELD) apparatus, etc. A monitor for a computer may
`
`include the LCD apparatus. The LCD apparatus has low luminance, narrow
`
`15
`
`viewing angle, etc. The CRT has heavy weight, large volume, etc.
`
`The O:~LD apparatus has various characteristics, for example, such as low
`
`cost, high luminance, thin thickness, light weight, etc.
`
`The OELD apparatus generates a light using an electro-luminescence of an
`
`organic material or polymers. When an electric energy is applied to the organic
`
`20 material or the polymers, the light is generated through the electro-luminescence.
`
`Therefore, a backlight may be omitted so that the OELD apparatus has thinner
`
`thickness and lower cost than the LCD apparatus.
`
`In addition, the OELD apparatus
`
`has wider viewing angle and higher luminance than the LCD apparatus.
`
`FIG. 1 is a circuit diagram showing a pixel of a conventional organic electro
`
`25
`
`luminescent panel.
`
`Referring to FIG. 1, an organic electro luminescent driving element of the
`
`conventional organic electro luminescent panel includes a switching transistor (QS),
`
`1
`
`LG Display Co., Ltd.
`Exhibit 1005
`Page 003
`
`

`

`WO 2004/090853
`
`PCT /KR2004/000787
`
`a storage capacitor (Cst), a driving transistor (QD) and an organic electro
`
`luminescent element. Current supply lines (VDD lines) are fanned with data lines
`
`in a direction that is substantially in parallel with the data line. A pixel is
`
`electrically connected to each of the current supply lines (VDD lines). The number
`
`5
`
`of the pixels is equal to that of scan lines.
`
`The organic electro luminescent display (OELD) apparatus has lower
`
`luminance than the cathode ray tube (CRT). An organic electro luminescent
`
`display (OELD) apparatus of a passive type has lower luminance than an organic
`
`electro luminescent display (OELD) apparatus of an active type. The organic
`
`10
`
`electro luminescent display (OELD) apparatus of a passive type generates the light
`
`when a voltage is applied to one of the scan lines. An active layer of a light
`
`emitting cell generates the light in proportion to an amount of a current that is
`
`applied to the active layer.
`
`A cross-talk may be formed in a direction that is substantially in parallel
`
`15 with the current supply lines (VDD lines) while the organic electro luminescent
`
`panel is operated.
`
`FIG. 2 is a plan view showing a cross-talk of a conventional organic electro
`
`luminescent panel.
`
`Referring to FIG. 2, when a voltage drop of each of the current supply lines
`
`20
`
`(VDD lines) corresponding to a column A where a white block is not displayed is
`
`small and a voltage drop of each of the current supply lines (VDD lines)
`
`corresponding to a column B where the white is displayed is large, pixels in the
`
`column B, which receive a current from each of the current supply lines (VDD lines)
`
`of the column B display a dark gray color.
`
`25
`
`Therefore, pixels disposed adjacent to an upper portion of the white block
`
`and a lower portion of the white block display the dark gray color that is darker than
`
`that of pixels spaced apart from the white block, thereby forming the cross-talk.
`
`In
`
`2
`
`LG Display Co., Ltd.
`Exhibit 1005
`Page 004
`
`

`

`WO 2004/090853
`
`PCT /KR2004/000787
`
`addition, the voltage drop of each of the current supply lines (VDD lines) increases
`
`in proportion to a size of the white block.
`
`Furthermore, a luminance of the pixels disposed adjacent to the upper and
`
`lower portions of·the white block decreases in proportion to the size of the white
`
`5
`
`block, therefore fanning the cross-talk.
`
`The luminance of the pixels decreases m inverse proportion to a light
`
`emitting area, and a change of the luminance in a longitudinal direction is greater
`
`than that in the horizontal direction.
`
`10 Disclosure
`
`-Technical Problem
`
`The present invention provides a display panel capable of decreasing a
`
`voltage drop and a cross-talk.
`
`The present invention also provides a method of manufacturing the display
`
`15
`
`panel.
`
`panel.
`
`The present invention also provides a display apparatus having the display
`
`-Technical Solution
`
`The display panel according to an exemplary embodiment of the present
`
`20
`
`invention includes a data line, a scan line, a switching part, a current supply line, an
`
`organic electro luminescent part and a driving part. The data and scan lines
`
`transfer a data signal and a scan signal, respectively. The switching part is formed
`
`in a unit pixel defined by the data and scan lines to control the output of the data
`
`signal in response to the scan signal. The current supply line is disposed on at least
`
`25
`
`two sides of the unit pixel to transfer a current. The sides of the unit pixel are
`
`disposed adjacent to one another. The organic electro luminescent part generates a
`
`light in response to the current. The driving part is disposed between the organic
`
`3
`
`LG Display Co., Ltd.
`Exhibit 1005
`Page 005
`
`

`

`WO 2004/090853
`
`PCT /KR2004/000787
`
`electro luminescent part and the current supply line to control the current in response
`
`to the data signal outputted from the switching part. The current flows between the
`
`organic electro luminescent part and the current supply line.
`
`In the method of manufacturing the display panel in accordance with an
`
`5
`
`aspect of the present invention, a scan line, a control electrode electrically connected
`
`to the scan line, and a storage capacitor line spaced apart from the scan line are
`
`formed. A data line, a first current supply line, a first pattern defming a first
`
`electrode of a driving transistor, and a second pattern defining a first electrode of a
`
`switching transistor are fanned. A pixel electrode and a second current supply line
`
`10
`
`spaced apart from the pixel electrode are formed. The pixel electrode is formed in
`
`a region defined by the scan and data lines.
`
`In the method of manufacturing the display panel in accordance with another
`
`aspect of the present invention, a scan line, a control electrode electrically connected
`
`to the scan line, a first current supply line substantially in parallel with the scan line,
`
`15
`
`and a storage capacitor line extended in a longitudinal direction are formed. A data
`
`line, a second current supply line, a first pattern defining a first electrode of a
`
`driving transistor, and a second pattern defining a first electrode of a switching
`
`transistor are formed. A pixel electrode and a third current supply line spaced apart
`
`from the pixel electrode are formed. The pixel electrode is formed in a region
`
`20
`
`defined by the scan and data lines.
`
`The display apparatus in accordance with an exemplary embodiment of the
`
`present invention includes a column driver, a low driver, a voltage supplier and a
`
`display panel. The column driver receives an image signal and a first timing signal
`
`to output a data signal. The low driver receives a second timing signal to output a
`
`25
`
`scan signal. The voltage supplier receives a voltage control signal to output a first
`
`voltage and a second voltage. The display panel controls an amount of a current
`
`formed by the first and second voltages in response to the first voltage, the second
`
`4
`
`LG Display Co., Ltd.
`Exhibit 1005
`Page 006
`
`

`

`WO 2004/090853
`
`PCT /KR2004/000787
`
`voltage, the scan signal and the data signal to generate a light.
`
`Therefore~ the organic electro luminescent display apparatus includes main
`
`current supply lines and auxiliary current supply lines that form a net shape to
`
`uniformize a voltage distribution, thereby decreasing a voltage drop and a cross-talk.
`
`5
`
`Description of Drawings
`
`The above and other advantages of the present invention will become readily
`
`apparent by reference to the following detailed description when considered in
`
`conjunction with the accompanying drawings wherein:
`
`10
`
`FIG. 1 is a circuit diagram showing a pixel of a conventional organic electro
`
`luminescent panel;
`
`FIG. 2 is a plan view showing a cross-talk of a conventional organic electro
`
`luminescent panel;
`
`FIG. 3 is a plan view showing an orgamc electro luminescent display
`
`15
`
`apparatus in accordance with an exemplary embodiment of the present invention;
`
`FIG. 4 is a plan view showing current supply lines of an organic electro
`
`luminescent display apparatus shown in FIG. 3;
`
`FIG. 5 is a circuit diagram showing a resistance of an organic electro
`
`luminescent panel in accordance with an exemplary embodiment of the present
`
`20
`
`invention;
`
`FIG. 6 is a graph showing a relationship between a voltage of an organic
`
`electro luminescent panel and the number of pixels;
`
`FIG. 7 is a circuit diagram showing a unit pixel of an organic electro
`
`luminescent display apparatus in accordance with an exemplary embodiment of the
`
`25
`
`present invention;
`
`FIG. 8 is a plan view showing a unit pixel of an organic electro luminescent
`
`display apparatus in accordance with an exemplary embodiment of the present
`
`5
`
`LG Display Co., Ltd.
`Exhibit 1005
`Page 007
`
`

`

`WO 2004/090853
`
`PCT /KR2004/000787
`
`invention;
`
`FIG. 9 is a cross-sectional view taken along the line A-A' of FIG. 8;
`
`FIGS. 10 to 17 are plan views showing a method of manufacturing an
`
`organic electro luminescent display apparatus in accordance with an exemplary
`
`5
`
`embodiment of the present invention;
`
`FIG. 18 is a circuit diagram showing a unit pixel of an organic electro
`
`luminescent display apparatus in accordance with another exemplary embodiment of
`
`the present invention;
`
`FIG. 19 is a plan view showing a unit pixel of an organic electro luminescent
`
`10
`
`display apparatus in accordance with another exemplary embodiment of the present
`
`invention;
`
`FIG. 20 is a cross-sectional view taken along the line Al-Al' of FIG. 19;
`
`FIGS. 21 to 24 are plan views showing a method of manufacturing an
`
`organic electro luminescent display apparatus in accordance with another exemplary
`
`15
`
`embodiment of the present invention;
`
`FIG. 25 is a circuit diagram showing a unit pixel of an organic electro
`
`luminescent display apparatus in accordance with another exemplary embodiment of
`
`the present invention;
`
`FIG. 26 is a plan view showing a unit pixel of an organic electro luminescent
`
`20
`
`display apparatus in accordance with another exemplary embodiment of the present
`
`invention;
`
`FIG. 27 is a circuit diagram showing a unit pixel of an organic electro
`
`luminescent display apparatus in accordance with another exemplary embodiment of
`
`the present invention;
`
`25
`
`FIG. 28 is a plan view showing a unit pixel of an organic electro luminescent
`
`display apparatus in accordance with another exemplary embodiment of the present
`
`invention;
`
`6
`
`LG Display Co., Ltd.
`Exhibit 1005
`Page 008
`
`

`

`WO 2004/090853
`
`PCT /KR2004/000787
`
`FIG. 29 is a cross-sectional view taken along the line B-B' of FIG. 28;
`
`FIGS. 30 to 34 are plan views showing a method of manufacturing an
`
`organic electro luminescent display apparatus in accordance with another exemplary
`
`embodiment of the present invention;
`
`5
`
`FIG. 35 is a plan view showing a unit pixel of an organic electro luminescent
`
`display apparatus in accordance with another exemplary embodiment of the present
`
`invention;
`
`FIG. 36 is a cross-sectional view taken along the line C-C' of FIG. 35;
`
`FIGS. 37 to 41 are plan views showing a method of manufacturing an
`
`10
`
`organic electro luminescent display apparatus in accordance with another exemplary
`
`embodiment of the present invention;
`
`FIG. 42 is a plan view showing a unit pixel of an organic electro luminescent
`
`display apparatus in accordance with another exemplary embodiment of the present
`
`invention;
`
`15
`
`FIG. 43 is a cross-sectional view taken along the line D-D' of FIG. 42; and
`
`FIGS. 44 to 48 are plan views showing a method of manufacturing an
`
`organic electro luminescent display apparatus in accordance with another exemplary
`
`embodiment of the present invention.
`
`20 BestMode
`
`FIG. 3 is a plan view showing an organic electro luminescent display
`
`apparatus in accordance with an exemplary embodiment of the present invention.
`
`Referring to FIG. 3, the organic electro luminescent display apparatus
`
`includes a timing controller 10, a column driver 20, a low driver 30, a first voltage
`
`25
`
`supplier 40, a second voltage supplier 45 and an organic electro luminescent panel
`
`50.
`
`The timing controller 10 receives an image signal and a control signal of the
`
`7
`
`LG Display Co., Ltd.
`Exhibit 1005
`Page 009
`
`

`

`WO 2004/090853
`
`PCT /KR2004/000787
`
`image signal from an externally provided graphic controller (not shown). The
`
`timing controller 10 outputs a first timing signal (TS 1) and the image signal to the
`
`colunm driver 20. Also, the timing controller 10 outputs a second timing signal
`
`(TS2) to the low driver 30.
`
`In addition, the timing controller 10 outputs a voltage
`
`5
`
`control signal (TS3) to the first and second voltage suppliers 40 and 45.
`
`The column driver 20 receives the image signal and the first timing signal
`
`(TS 1) from the timing controller 10 to output data signals (D 1, D2, ... , Dm-1, Dm)
`
`to the organic electro luminescent panel 50.
`
`The low driver 30 receives the second timing signal (TS2) from the timing
`
`10
`
`controller 10 to output scan signals (G 1, G2, ... , Gn-1, Gn) to the organic electro
`
`luminescent panel 50.
`
`The first voltage supplier 40 receives the voltage control signal (TS3) to
`
`output a first voltage to a first current supply line that is extended in a longitudinal
`
`direction and arranged in a horizontal direction. The first voltage supplier 40 may
`
`15
`
`also output the first voltage to a plurality of the first current supply lines. The first
`
`voltage may be a bias voltage. When the organic electro luminescent panel 50 has
`
`a P-type driving transistor, the first voltage may be higher than a common voltage
`
`that is applied to an organic electro luminescent element.
`
`In contrast, when the
`
`organic electro luminescent panel 50 has an N-type driving transistor, the first
`
`20
`
`voltage may be lower than the common voltage that is applied to the organic electro
`
`luminescent element. The common voltage may be a ground voltage.
`
`The second voltage supplier 45 receives the voltage control signal (TS3) to
`
`output a second voltage to a second current supply line that is extended in the
`
`horizontal direction and arranged in the longitudinal direction. The second voltage
`
`25
`
`supplier 45 may also output the second voltage to a plurality of the second current
`
`supply lines. The second voltage may be substantially equal to the first voltage.
`
`Alternatively, the second voltage may also be different from the first voltage.
`
`8
`
`LG Display Co., Ltd.
`Exhibit 1005
`Page 010
`
`

`

`WO 2004/090853
`
`PCT /KR2004/000787
`
`Further, the second voltage supplier may be omitted so that the first voltage supplier
`
`40 supplies the first voltage to the second current supply lines through transmission
`
`lines.
`
`The organic electro luminescent panel 50 includes a first station 51, a second
`
`5
`
`station 52, a first bridge line 53 that connects the first station 51 to the second station
`
`52, a third station 54, a fourth station 55 and a second bridge line 56 that connects
`
`the third station 54 to the fourth station 55.
`
`In addition, the organic electro luminescent panel 50 includes a plurality of
`
`data lines, a plurality of first current supply lines, a plurality of scan lines and a
`
`10
`
`plurality of second current supply lines. Numbers of the data lines, the first current
`
`supply lines, the scan lines and the second current supply lines are 'm', 'm', 'n' and
`
`'n', respectively, wherein 'm' and 'n' are positive numbers and are independent
`
`from each other. The organic electro luminescent panel 50 displays an image using
`
`the image signal that is provided from the column driver 20 in response to the scan
`
`15
`
`signals that are provided from the low driver 30. A switching element (QS, not
`
`shown), a driving element (QD, not shown), an organic electro luminescent element
`
`(not shown) and a storage capacitor (Cst, not shown) are formed in a region defined
`
`by two adjacent data lines and two adjacent scan lines.
`
`A first end portion of the switching element (QS) is electrically connected to
`
`20
`
`one of the data lines. A second end portion of the switching element (QS) is
`
`electrically connected to one of the scan lines. The switching element (QS)
`
`controls the output of the data signal to output the data signal through a third end
`
`portion of the switching element (QS). A first end portion of the organic electro
`
`luminescent element is electrically connected to a polarity terminal where the
`
`25
`
`common voltage is applied. The organic electro luminescent element generates a
`
`light in response to an amount of current that is applied to the organic electro
`
`luminescent element.
`
`9
`
`LG Display Co., Ltd.
`Exhibit 1005
`Page 011
`
`

`

`WO 2004/090853
`
`PCT /KR2004/000787
`
`A first end portion of the driving element (QD) is electrically connected to a
`
`second end portion of the organic electro luminescent element. A second end
`
`portion of the driving element (QD) is electrically connected to one of the first
`
`current supply lines. The driving element (QD) controls a current between the first
`
`5
`
`and second end portions of the driving element (QD) in response to the output signal
`
`that is provided from the third end portion of the switching element (QS) to control
`
`an illumination of the organic electro luminescent element.
`
`A first end portion of the storage capacitor (Cst) is electrically connected to
`
`the third end portion of the switching element (QS), and a second end portion of the
`
`10
`
`storage capacitor (Cst) is electrically connected to one of the first current supply
`
`lines so that a electric charge is stored in the storage capacitor (Cst) in response to a
`
`driving voltage.
`
`A first station 51 and a second station 52 of the organic electro luminescent
`
`panei 50 receive the first voltage from the first voltage supplier 40 to output the first
`
`15
`
`voltage to the first current supply lines (1st VDD lines) of the organic electro
`
`luminescent panel 50, which are extended in the longitudinal direction and arranged
`
`in the horizontal direction. The organic electro luminescent panel 50 may include
`
`a plurality of the stations.
`
`A third station 54 and a fourth station 55 of the organic electro luminescent
`
`20
`
`panel 50 receive the second voltage from the second voltage supplier 45 to output
`
`the second voltage to the second current supply lines (2nd VDD lines) of the organic
`
`electro luminescent panel 50, which are extended in the horizontal direction and
`
`arranged in the longitudinal direction.
`
`The first and second voltage suppliers 40 and 45 are disposed on an upper
`
`25
`
`portion and a right-sided portion of the organic electro luminescent panel 50 so that
`
`the first and second voltages are applied to the first and second current supply lines,
`
`respectively. Alternatively, the first and second voltage suppliers may be disposed
`
`10
`
`LG Display Co., Ltd.
`Exhibit 1005
`Page 012
`
`

`

`WO 2004/090853
`
`PCT /KR2004/000787
`
`on a lower portion and a left-sided portion of the organic electro luminescent panel
`
`so that the first and second voltages are applied to the first and second current
`
`supply lines, respectively.
`
`FIG. 4 is a plan view showing current supply lines of an organic electro
`
`5
`
`luminescent display apparatus shown in FIG. 3. The current supply lines are
`
`arranged in the direction that is substantially in parallel with the data lines.
`
`Referring to FIGS. 3 and 4, the current supply lines are electrically connected
`
`to the first bridge line 53 that electrically connepts the first station 51 to the second
`
`station 52 through contact holes. The number of the current supply lines is
`
`10
`
`determined in response to a resolution of the organic electro luminescent panel 50.
`
`The first bridge line 53 includes aluminum neodymium (AlNd) of about 3000A ..
`
`The first bridge line 53 and the data lines may be formed from a same layer.
`
`FIG. 5 is a circuit diagram showing a resistance of an organic electro
`
`luminescent panel in accordance with an exemplary embodiment of the present
`
`15
`
`invention. A voltage drop of a predetermined current supply line (VDD line) is
`
`calculated. The organic electro luminescent panel includes a video graphics array
`
`(VGA) mode. A resolution of the organic electro luminescent panel is 640X480X3.
`
`A cathode resistance of the organic electro luminescent panel is negligible.
`
`Referring to FIG. 5, 480 pixels are electrically connected to each of the
`
`20
`
`current supply lines (VDD Lines) in substantially in parallel. A line resistance
`
`(Lv) corresponding to an n-th pixel is formed between a portion of the current
`
`supply line disposed between two adjacent pixels. One of the two adjacent pixels
`
`is then-th pixel.
`
`In addition, a contact resistance (Re) between the current supply
`
`line and the bridge line, and a fan-out line resistance (Rp) of the current supply line
`
`25
`
`are formed in the organic electro luminescent panel. Furthermore, an n-th pixel
`
`resistance (P[n]) corresponding to then-th pixel, and a partial sum resistance (Rv[n])
`
`that is a summation of the pixel resistances (P[n, n+ 1, ... , 480]) and the line
`
`11
`
`LG Display Co., Ltd.
`Exhibit 1005
`Page 013
`
`

`

`WO 2004/090853
`
`PCT /KR2004/000787
`
`resistances (Lv) corresponding to then-th to 480th pixels are formed in the organic
`
`electTo luminescent panel. A VDD voltage (Vv[n]) is applied to then-th pixeL
`
`Table 1 represents the line resistance (Lv), the contact resistance (Re), the
`
`fan-out line resistance (Rp ), the pixel resistance (P) and the VDD voltage (Vv) of a
`
`5
`
`predetermined pixel.
`
`Table 1
`
`Re
`
`Rp
`
`Lv
`
`P[n]
`
`VDD
`
`0.00214[0]
`
`AlNd (Gate)/ MoW (Data)
`
`MoW (Thiclmess 3000A, Width 7µm)
`
`Pitch of Pixel 200 µm
`
`55[0]
`
`11.0[0]
`
`22.5[0]
`
`lO[Volts]
`
`The resistance (Rv[479]) sensed at a 479th pixel is derived by the following
`
`Equation 1.
`
`10
`
`15
`
`Equation 1
`l/Rv[479] = 1/(Lv + P[480]) + l/P[479]
`The resistance (Rv[n]) sensed at the n-th pixel is derived by the following
`
`Equation 2.
`
`Equation 2
`1/Rv[n] = 1/(Lv + Rv[n+ 1]) + 1/P[n]
`The line resistance (Lv) is formed between the portion of the current supply
`
`line disposed between the n-th pixel and an n-1-th pixel. Also, the n-th pixel
`
`resistance (P[n]) corresponding to the n-th pixel, and the partial sum resistance
`
`(Rv[n]) that is the summation of the pixel resistances (P[n, n+ 1, ... , 480]) and the
`
`line resistances (Lv) corresponding to the n-th to 480th pixels are formed in the
`
`20
`
`organic electro luminescent panel. The n-th pixel may display a predetennined
`
`gray color.
`
`The voltage (Vv[l]) sensed at the first pixel is derived by the following
`
`12
`
`LG Display Co., Ltd.
`Exhibit 1005
`Page 014
`
`

`

`WO 2004/090853
`
`PCT /KR2004/000787
`
`Equation 3.
`
`Equation 3
`Vv[l] = Rv[l]"VDD/(Rc + Rp + Rv[l])
`The voltage (Vv[n]) sensed at the n-th pixel is derived by the following
`
`5 Equation 4.
`
`Equation 4
`Vv[n] = Rv[n]"Vv[n-1]/(Lv + Rv[n])
`The line resistance (Lv) is formed between the portion of the current supply
`
`line disposed between the n-th pixel and the n-lst pixel. Also, the partial sum
`
`10
`
`resistance (Rv[n]) that is the summation of the pixel resistances (P[n, n+l, ... , 480])
`
`and the line resistances (Lv) corresponding to then-th to 480th pixels are formed in
`
`the organic electro luminescent panel. The VDD voltage (Vv[n]) is applied to the
`
`n-th pixel.
`
`FIG. 6 is a graph showing a relationship between a voltage of an organic
`
`15
`
`electro luminescent panel and the number of pixels.
`
`The organic electro
`
`luminescent panel includes the video graphics array (VGA) mode. The resolution
`
`of the organic electro luminescent panel is 640X480X3. The current supply lines
`
`are arranged in the direction that is substantially in parallel with the data lines. The
`
`data lines are extended in the longitudinal direction. Each of the current supply
`
`20
`
`lines includes the aluminum-neodymium (AlNd). The thiclrness of the current
`
`supply line is about 3000 A.
`
`When all the pixels display a black gray color, a voltage drop is represented
`
`by a curve 'I'. When the first to 120th pixels display a white gray color and the
`
`121st to 480th pixels display the black gray color, a voltage drop is represented by a
`
`25
`
`curve 'II'. When the first to 240th pixels display the white gray color and the 241 st
`
`to 480th pixels displays the black gray color, a voltage drop is represented by a
`
`curve 'III'. When the first to 360th pixels display the white gray color and the
`
`13
`
`LG Display Co., Ltd.
`Exhibit 1005
`Page 015
`
`

`

`WO 2004/090853
`
`PCT /KR2004/000787
`
`361st to 480th pixels displays the black gray color, a voltage drop is represented by
`
`a curve 'IV'. When all the pixels display the white gray color, a voltage drop is
`
`represented by a curve 'V'.
`
`Referring to FIG. 6, the voltage drop increases in proportion to the number of
`
`5
`
`the pixels. That is, the voltage drop corresponding to the direction that is
`
`substantially in parallel with the current supply lines (VDD Lines) increases in
`
`proportion to a distance between a voltage source and each of the pixels. Also, the
`
`voltage drop increases in proportion to the number of the pixels that display the
`
`white gray color. When all the pixels display the white gray color, the voltage drop
`
`10
`
`is about 0.55 [Volts].
`
`The current supply lines are substantially in parallel with the data lines.
`
`When the current supply lines are substantially in parallel with the data lines, a
`
`longitudinal cross-talk may be formed. Alternatively, the current supply lines may
`
`be substantially in parallel with the scan lines. When the current supply lines are
`
`15
`
`substantially in parallel with the scan lines, a horizontal cross-talk may be formed.
`
`The voltage drop deteriorates a luminance uniformity of the organic electro
`
`luminance panel.
`
`In addition, a voltage distribution may be changed in response to
`
`the image of the dark or white gray colors that are displayed using single column or
`
`single row. Therefore, luminance of the organic electro luminescent panel may be
`
`20
`
`changed in response to the cross-talk and an area of the white gray color.
`
`A gray-scale of the organic electro luminescent panel is determined in
`
`response to a voltage difference between the first voltage and the data voltage,
`
`which is substantially equal to a voltage difference (VGS) between a gate electrode
`
`and a source electrode of a driving thin film transistor.
`
`25
`
`When the voltage drop is formed in the longitudinal direction, the voltage
`
`difference (VGS) between the gate electrode and the source electrode of the driving
`
`thin film transistor is changed so that the gray-scale of the organic electro
`
`14
`
`LG Display Co., Ltd.
`Exhibit 1005
`Page 016
`
`

`

`WO 2004/090853
`
`PCT /KR2004/000787
`
`luminescent panel is also changed. When the voltage drop is formed in the
`
`horizontal direction, the voltage difference (VGS) between the gate electrode and
`
`the source electrode of the driving thin film transistor is changed so that the
`
`gray-scale of the organic electro luminescent panel is also changed.
`
`5
`
`According to this exemplary embodiment, the organic electro luminescent
`
`panel includes the current supply lines (VDD lines) arranged in a net shape to
`
`decrease the cross-talk or a variation of luminance.
`
`FIG. 7 is a circuit diagram showing a unit pixel of an organic electro
`
`luminescent display apparatus in accordance with an exemplary embodiment of the
`
`10
`
`present invention.
`
`Referring to FIG. 7, the unit pixel includes a first switching transistor (QS1),
`
`a second switching transistor (QS2), a storage capacitor (Cst), a driving transistor
`
`(QD) and an organi