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`(12)INTERNATIONAL APPLICATION PUBLISHED UNDER THE PATENT COOPERATION TREATY (PCT)
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`(19) Wor]d Intc11cctua1 Property
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`Organization
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`International Bureau
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`( 43)International Publication Date
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`2004 (21.10.2004)PCT
`21 October
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`1111111111111111 IIIIII IIIII 111111111111111111111111111111111111111111111 IIII IIIIIII IIII 11111111
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`(10)International Publication Number
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`WO 2004/090853 Al
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`(25)Filing Language:
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`(26)Publication Language:
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`-=
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`--
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`DJSPLJ\ Y PJ\NRL
`(54)Title:
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`Dg+l V-Vddgtl\
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`EL vss
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`O (57) Abstract: In an OELD panel capable of decreasing a cross-talk and an OELD apparatus haYing the OELD panel, a switching
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`0 part is formed in a unit pixel defined hy a data line and a scan line to control the output of a data signal in response to a scan signal.
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`M J\ 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
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`J\ chiving pm1 is disposedto the current. a light in response part generates luminescent i\.n organic electro O adjacent lo one another.
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`oulpulli:d Lo the data signal the curri:nl in response: supply line Lo control part and the cuni:nl lumini:scenl :, belwi:en the organic dcct.ro
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`;,;-,- from the switching part. Therefore, the cunenl supply line forms a net shape lo decrease a cross-talk.
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`(51)International Patent Classification 7: G09G 3/30
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`(KRl. CHAI, Chong-Chui [KR/KR]: 102-2001 Sam­
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`sung Apt., Singongdcok-dong, Mapo-gu, Seoul 121-765
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`(21)International Application Number:
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`(KR). CHOI, Joon-Hoo [KR/KR]; 108-303 Samho Apt..
`PC'T/KR2004/000787
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`Youngchi:on-dong, Seodaemun-gu. Si:oul 120-768 (KRJ.
`Date:6 April 2004 !06.04.2004)
`(22)International Filing
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`(74)Agent: PARK, Young-Woo: SE, Seil Building, #727-13
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`Yoksam-dong. Gangnam-gu, Seoul 135-921 ( KR).
`Korean
`English
`(unLPu nthP1wise indi,,ated. fnr ewry
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`(81)Designated States
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`kind nf natinnal rmtfftinn amilahlr!: J\E. J\G. J\L. J\M.
`(30)Priority Data:
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`J\T, i\lT, J\Z, BA, BB, BG, BR, BW, BY BZ, CJ\, CIT, CN,
`I 0-2003-0021640
`7 April 2003 (07.04.2003 l KR
`
`CO, CR, CU, CZ, DE. DK. DM. DZ, UC, EE. UG. US, FL
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`1 April 2004 (01.04.2004 l KR
`10-2004-0022553
`GB, GD. GU, GH, GM, HR, HU, lD, IL, IN, IS, JP. KE.
`KG. KP, KZ. LC. LK, LR, LS. Lr, LU, LY. MA. MD. MG.
`(fnr all dPsiinatPd StatPs
`Pxapt l!S): SAM­
`(71)Applicant
`MK. l'vIN. MW, MX, MZ, NA, NJ, NO, NZ, OM, PG, PH.
`
`CO., LTD. [KR/KR]: 416 Mae­
`SUNG ELECTRONICS
`PL, PT. RO. RU, SC. SD. SR, SG. SK. SL, SY. T.T, TM, TN.
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`lan-dong. Yconglong-gu, Suwon-si. Gyeonggi-do 442-742
`TR, TT, TZ. UA, UG, US, UZ. VC, VN, YU, ZJ\, ZM. ZW.
`(KRJ.
`=
`(�) Designated (unless u1he1wise indicaled. fur every
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`(72)Inventors; and
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`States
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`kind uf regional proleclion arni/ablej: ARIPO (BW. GIL
`(for US only): SHIN, Kyoung-Ju
`(75)Inventors/Applicants
`=
`GM. KE. LS, MW. MZ, SD, SL, SZ. TZ, UG, ZM, ZW).
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`IKR/KRI: 102-504 Samjeongseonbi maeul, #289-12.
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`Eurasian !AM. AZ, BY, KG, KZ. MD. RU T.T, TM), Euro­
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`Bora-ri. Giheung-eup. Yongin-si, Gveonggi-do 449-904
`-=
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`(KR l. CHOI, Beohm-Rock [KR/KR]; 112-508 Sam­
`pean (/\T. BR, BG, CH, CY, CZ. DR, DK, RR, RS. Ff, FR.
`=
`GB, GR, IIU, ill. IT. LU. MC. NL, PL. PT, RO, SE. SI, SK.
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`sung Apt., Dai:chi 1-dong, Gangnam-gu, Seoul 135-968
`=
`=
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`{('nntinurd nn no:t ragP 1
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`IPR2020-01546
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`WO 2004/090853 Al
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`1111111111111111 IIIIII IIIII 111111111111111111111111111111111111111111111 IIII IIIIIII IIII 11111111
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`TR). OAPl (BF, BJ. CF, CG, Cl. CM. GA. GN. GQ, GW.
`Fur twu-leller cudes and other abbreviations, re.Jer tu the "Guid­
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`ML.MR. NE, SN, TD. TG).
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`ance Notes on Codes and,4bbreviations" appearini at the beiin­
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`nini of Parh rPgu far issuP nf thP P('T Gazpff P.
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`Published:
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`- with international search report
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`IPR2020-01546
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`WO 2004/090853
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`PCT /KR2004/000787
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`DISPLAY PANEL
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`Technical Field
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`The present invention relates to a display panel, a method of manufacturing
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`5 the display panel and a display apparatus having the display panel. More
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`particularly, the present invention relates to a display panel capable of decreasing a
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`cross-talk, a method of manufacturing the display panel and a display apparatus
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`having the display panel.
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`10 Background Art
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`A display apparatus may be classified into a cathode ray tube (CRT), a liquid
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`crystal display (LCD) apparatus, a plasma display panel (PDP), an organic electro
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`luminescent display (OELD) apparatus, etc. A monitor for a computer may
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`include the LCD apparatus. The LCD apparatus has low luminance, narrow
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`etc. large volume, 15 viewing angle, etc. The CRT has heavy weight,
`The O:�LD apparatus
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`has various characteristics, for example, such as low
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`etc. cost, high luminance, thin thickness, light weight,
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`The OELD apparatus generates a light using an electro-luminescence of an
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`organic material or polymers. When an electric energy is applied to the organic
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`the electro-luminescence. the light is generated through 20 material or the polymers,
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`Therefore, a backlight may be omitted so that the OELD apparatus has thinner
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`thickness and lower cost than the LCD apparatus. In addition, the OELD apparatus
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`has wider viewing angle and higher luminance than the LCD apparatus.
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`FIG. 1 is a circuit diagram showing a pixel of a conventional organic electro
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`25 luminescent panel.
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`Referring to FIG. 1, an organic electro luminescent driving element of the
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`conventional organic electro luminescent panel includes a switching transistor (QS),
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`WO 2004/090853
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`PCT /KR2004/000787
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`a storage capacitor (Cst), a driving transistor (QD) and an organic electro
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`luminescent
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`element. Current supply lines (VDD lines) are fanned with data lines
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`electrically connected to each of the current supply lines (VDD lines).
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`5 of the pixels is equal to that of scan lines.
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`The organic electro luminescent display (OELD) apparatus has lower
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`luminance than the cathode ray tube (CRT). An organic electro luminescent
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`display (OELD) apparatus of a passive type has lower luminance than an organic
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`electro luminescent display (OELD) apparatus of an active type. The organic
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`electro luminescent display (OELD) apparatus of a passive type generates the light
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`when a voltage is applied to one of the scan lines. An active layer of a light
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`emitting cell generates the light in proportion to an amount of a current that is
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`A cross-talk may be formed in a direction that is substantially in parallel
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`organic electro luminescent 15 with the current supply lines (VDD lines) while the
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`panel is operated.
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`FIG. 2 is a plan view showing a cross-talk of a conventional organic electro
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`Referring to FIG. 2, when a voltage drop of each of the current supply lines
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`is to a column A where a white block is not displayed 20 (VDD lines) corresponding
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`small and a voltage drop of each of the current supply lines (VDD lines)
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`corresponding to a column B where the white is displayed is large, pixels in the
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`column B, which receive a current from each of the current supply lines (VDD lines)
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`of the column B display a dark gray color.
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`Therefore, pixels disposed adjacent to an upper portion of the white block
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`and a lower portion of the white block display the dark gray color that is darker than
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`that of pixels spaced apart from the white block, thereby forming the cross-talk. In
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`WO 2004/090853
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`PCT /KR2004/000787
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`addition,
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`the voltage drop of each of the current supply lines (VDD lines)
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`Furthermore, a luminance of the pixels disposed adjacent to the upper and
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`lower portions of·the white block decreases in proportion to the size of the white
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`5 block, therefore fanning the cross-talk.
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`The luminance of the pixels decreases m inverse proportion to a light
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`emitting area, and a change of the luminance in a longitudinal direction is greater
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`than that in the horizontal direction.
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`10 Disclosure
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`-Technical Problem
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`The present invention provides a display panel capable of decreasing a
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`voltage drop and a cross-talk.
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`The present invention also provides a method of manufacturing the display
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`15 panel.
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`The present invention also provides a display apparatus having the display
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`panel.
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`-Technical Solution
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`The display panel according to an exemplary embodiment of the present
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`supply line, an part, a current 20 invention includes a data line, a scan line, a switching
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`organic electro luminescent part and a driving part. The data and scan lines
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`transfer a data signal and a scan signal, respectively. The switching part is formed
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`in a unit pixel defined by the data and scan lines to control the output of the data
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`signal in response to the scan signal. The current supply line is disposed on at least
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`25 two sides of the unit pixel to transfer a current. The sides of the unit pixel are
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`disposed adjacent to one another. The organic electro luminescent part generates a
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`light in response to the current. The driving part is disposed between the organic
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`3
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`WO 2004/090853
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`PCT /KR2004/000787
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`the current
`luminescent part and the current
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`supply line to control
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`to the data sign al outputted
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`from the switching part. The current flows between the
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`organic electro luminescent part and the current supply line.
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`In the method of manufacturing the display panel in accordance with an
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`5 aspect of the present invention, a scan line, a control electrode electrically connected
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`to the scan line, and a storage capacitor line spaced apart from the scan line are
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`formed. A data line, a first current supply line, a first pattern defming a first
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`electrode of a driving transistor, and a second pattern defining a first electrode of a
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`switching transistor are fanned. A pixel electrode and a second current supply line
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`is formed in 10 spaced apart from the pixel electrode are formed. The pixel electrode
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`a region defined by the scan and data lines.
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`In the method of manufacturing the display panel in accordance with another
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`aspect of the present invention, a scan line, a control electrode electrically connected
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`to the scan line, a first current supply line substantially in parallel with the scan line,
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`direction are formed. A data in a longitudinal 15 and a storage capacitor line extended
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`line, a second current supply line, a first pattern defining a first electrode of a
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`driving transistor, and a second pattern defining a first electrode of a switching
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`transistor are formed. A pixel electrode and a third current supply line spaced apart
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`from the pixel electrode are formed. The pixel electrode is formed in a region
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`20 defined by the scan and data lines.
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`The display apparatus in accordance with an exemplary embodiment of the
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`present invention includes a column driver, a low driver, a voltage supplier and a
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`display
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`panel. The column driver receives an image sign al and a first
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`timing signal
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`receives a second timing sign al to output a
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`control a voltage supplier receives 25 scan signal. The voltage sign al to output a first
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`voltage and a second voltage. The display panel controls an amount of a current
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`formed by the first and second voltages in response to the first voltage, the second
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`WO 2004/090853
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`PCT /KR2004/000787
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`voltage, the scan signal and the data signal to generate a light.
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`Therefore� the organic electro luminescent display apparatus includes main
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`current supply lines and auxiliary current supply lines that form a net shape to
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`uniformize a voltage distribution, thereby decreasing a voltage drop and a cross-talk.
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`5
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`Description of Drawings
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`The above and other advantages of the present invention will become readily
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`apparent by reference to the following detailed description when considered in
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`conjunction with the accompanying drawings wherein:
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`10
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`FIG. 1 is a circuit diagram showing a pixel of a conventional organic electro
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`luminescent panel;
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`FIG. 2 is a plan view showing a cross-talk of a conventional organic electro
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`FIG. 3 is a plan view showing an orgamc electro luminescent display
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`embodiment of the present invention; 15 apparatus in accordance with an exemplary
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`FIG. 4 is a plan view showing current supply lines of an organic electro
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`luminescent display apparatus shown in FIG. 3;
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`FIG. 5 is a circuit diagram showing a resistance of an organic electro
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`luminescent panel in accordance with an exemplary embodiment of the present
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`20 invention;
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`FIG. 6 is a graph showing a relationship between a voltage of an organic
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`electro luminescent panel and the number of pixels;
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`FIG. 7 is a circuit diagram showing a unit pixel of an organic electro
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`luminescent display apparatus in accordance with an exemplary embodiment of the
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`25 present invention;
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`FIG. 8 is a plan view showing a unit pixel of an organic electro luminescent
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`display apparatus in accordance with an exemplary embodiment of the present
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`5
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`WO 2004/090853
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`PCT /KR2004/000787
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`invention;
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`FIG. 9 is a cross-sectional view taken along the line A-A' of FIG. 8;
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`FIGS. 10 to 17 are plan views showing a method of manufacturing an
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`organic electro luminescent display apparatus in accordance with an exemplary
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`5 embodiment of the present invention;
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`FIG. 18 is a circuit diagram showing a unit pixel of an organic electro
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`luminescent display apparatus in accordance with another exemplary embodiment of
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`the present invention;
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`FIG. 19 is a plan view showing a unit pixel of an organic electro luminescent
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`of the present embodiment exemplary with another 10 display apparatus in accordance
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`invention;
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`FIG. 20 is a cross-sectional view taken along the line Al-Al' of FIG. 19;
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`FIGS. 21 to 24 are plan views showing a method of manufacturing an
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`15 embodiment of the present invention;
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`FIG. 25 is a circuit diagram showing a unit pixel of an organic electro
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`luminescent display apparatus in accordance with another exemplary embodiment of
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`the present invention;
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`FIG. 26 is a plan view showing a unit pixel of an organic electro luminescent
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`of the present embodiment exemplary with another 20 display apparatus in accordance
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`invention;
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`FIG. 27 is a circuit diagram showing a unit pixel of an organic electro
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`luminescent display apparatus in accordance with another exemplary embodiment of
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`the present invention;
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`25
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`FIG. 28 is a plan view showing a unit pixel of an organic electro luminescent
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`display apparatus in accordance with another exemplary embodiment of the present
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`invention;
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`6
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`IPR2020-01546
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`WO 2004/090853
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`PCT /KR2004/000787
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`FIG. 29 is a cross-sectional view taken along the line B-B' of FIG. 28;
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`FIGS. 30 to 34 are plan views showing a method of manufacturing an
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`organic electro luminescent display apparatus in accordance with another exemplary
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`embodiment of the present invention;
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`FIG. 35 is a plan view showing
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`a unit pixel of an organic electro luminescent
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`display apparatus in accordance with another exemplary embodiment of the present
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`invention;
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`FIG. 36 is a cross-sectional view taken along the line C-C' of FIG. 35;
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`FIGS. 37 to 41 are plan views showing a method of manufacturing an
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`10 organic electro luminescent display apparatus in accordance with another exemplary
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`embodiment of the present invention;
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`FIG. 42 is a plan view showing a unit pixel of an organic electro luminescent
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`display apparatus in accordance with another exemplary embodiment of the present
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`invention;
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`15
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`FIG. 43 is a cross-sectional view taken along the line D-D' of FIG. 42; and
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`FIGS. 44 to 48 are plan views showing a method of manufacturing an
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`organic electro luminescent display apparatus in accordance with another exemplary
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`embodiment of the present invention.
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`20 BestMode
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`FIG. 3 is a plan view showing an organic electro luminescent display
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`apparatus in accordance with an exemplary embodiment of the present invention.
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`Referring
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`to FIG. 3, the organic electro luminescent display apparatus
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`includes a timing controller 10, a column driver 20, a low driver 30, a first voltage
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`25 supplier 40, a second voltage supplier 45 and an organic electro luminescent panel
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`50.
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`an image sign al and a control sign al of the
`The timing controller 10 receives
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`7
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`IPR2020-01546
`Apple EX1007 Page 9
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`WO 2004/090853
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`image sign al from an externally
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`controller (not shown). The
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`provided graphic
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`timing
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`sign al (TS 1) and the image sign al to the
`controller 10 outputs a first timing
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`signal 10 outputs a second timing controller colunm driver 20. Also, the timing
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`(TS2) to the low driver 30. In addition, the timing controller 10 outputs a voltage
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`5 control sign al (TS3) to the first and second voltage suppliers 40 and 45.
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`the image sign al and the first timing sign al
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`The column driver 20 receives
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`(TS 1) from the timing controller 10 to output data sign als (D 1, D2, ... , Dm-1, Dm)
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`The low driver 30 receives the second timing signal (TS2) from the timing
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`scan sign als (G 1, G2, ... , Gn-1, Gn) to the organic electro
`10 controller 10 to output
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`luminescent panel 50.
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`control sign al (TS3) to
`The first voltage supplier 40 receives the voltage
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`output a first voltage to a first current supply line that is extended in a longitudinal
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`direction and arranged in a horizontal direction. The first voltage supplier 40 may
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`15 also output the first voltage to a plurality of the first current supply lines. The first
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`voltage may be a bias voltage. When the organic electro luminescent panel 50 has
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`a P-type driving transistor, the first voltage may be higher than a common voltage
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`that is applied to an organic electro luminescent element. In contrast, when the
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`organic electro luminescent panel 50 has an N-type driving transistor, the first
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`to the organic electro that is applied 20 voltage may be lower than the common voltage
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`luminescent element. The common voltage may be a ground voltage.
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`sign al (TS3) to
`The second voltage supplier 45 receives the voltage control
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`output a second voltage to a second current supply line that is extended in the
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`horizontal direction and arranged in the longitudinal direction. The second voltage
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`25 supplier 45 may also output the second voltage to a plurality of the second current
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`equal to the first voltage. supply lines. The second voltage may be substantially
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`Alternatively, the second voltage may also be different from the first voltage.
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`8
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`IPR2020-01546
`Apple EX1007 Page 10
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`WO 2004/090853
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`PCT /KR2004/000787
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`Further, the second voltage supplier may be omitted
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`so that the first voltage supplier
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`40 supplies the first voltage to the second current supply lines through transmission
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`lines.
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`The organic electro luminescent panel 50 includes a first station 51, a second
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`station 52, a first bridge line 53 that connects the first station 51 to the second station
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`5
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`52, a third station 54, a fourth station 55 and a second bridge line 56 that connects
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`the third station 54 to the fourth station 55.
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`In addition, the organic electro luminescent panel 50 includes a plurality of
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`data lines, a plurality of first current supply lines, a plurality of scan lines and a
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`the first current lines. Numbers of the data lines, 10 plurality of second current supply
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`supply lines, the scan lines and the second current supply lines are 'm', 'm', 'n' and
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`'n', respectively, wherein 'm' and 'n' are positive numbers and are independent
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`from each other. The organic electro luminescent panel 50 displays an image using
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`the image signal that is provided from the column driver 20 in response to the scan
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`element (QS, not 30. A switching from the low driver 15 signals that are provided
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`shown), a driving element (QD, not shown), an organic electro luminescent element
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`(not shown) and a storage capacitor (Cst, not shown) are formed in a region defined
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`by two adjacent data lines and two adjacent scan lines.
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`A first end portion of the switching element (QS) is electrically connected to
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`element (QS) is 20 one of the data lines. A second end portion of the switching
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`element (QS) electrically connected to one of the scan lines. The switching
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`controls
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`the output of the data signal to output the data signal through a third end
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`portion of the switching element (QS). A first end portion of the organic electro
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`luminescent element is electrically connected to a polarity terminal where the
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`generates a electro luminescent element The organic 25 common voltage is applied.
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`light in response to an amount of current that is applied to the organic electro
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`luminescent element.
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`9
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`IPR2020-01546
`Apple EX1007 Page 11
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`WO 2004/090853
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`PCT /KR2004/000787
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`connected to a element (QD) is electrically A first end portion of the driving
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`second end portion of the organic electro luminescent element. A second end
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`portion of the driving element (QD) is electrically connected to one of the first
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`current supply lines. The driving element (QD) controls a current between the first
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`5 and second end portions of the driving element (QD) in response to the output signal
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`that is provided from the third end portion of the switching element (QS) to control
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`an illumination of the organic electro luminescent element.
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`A first end portion of the storage capacitor (Cst) is electrically connected to
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`the third end portion of the switching element (QS), and a second end portion of the
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`10 storage capacitor (Cst) is electrically connected to one of the first current supply
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`lines so that a electric charge is stored in the storage capacitor (Cst) in response to a
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`driving voltage.
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`A first station 51 and a second station 52 of the organic electro luminescent
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`panei 50 receive the first voltage from the first voltage supplier 40 to output the first
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`electro of the organic supply lines (1st VDD lines) 15 voltage to the first current
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`luminescent panel 50, which are extended in the longitudinal direction and arranged
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`in the horizontal direction. The organic electro luminescent panel 50 may include
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`a plurality of the stations.
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`A third station 54 and a fourth station 55 of the organic electro luminescent
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`20 panel 50 receive the second voltage from the second voltage supplier 45 to output
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`the second voltage to the second current supply lines (2nd VDD lines) of the organic
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`electro luminescent panel 50, which are extended in the horizontal direction and
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`arranged in the longitudinal direction.
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`The first and second voltage suppliers 40 and 45 are disposed on an upper
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`25 portion and a right-sided portion of the organic electro luminescent panel 50 so that
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`the first and second voltages are applied to the first and second current supply lines,
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`respectively. Alternatively, the first and second voltage suppliers may be disposed
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`10
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`IPR2020-01546
`Apple EX1007 Page 12
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`WO 2004/090853
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`PCT /KR2004/000787
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`on a lower portion and a left-sided portion of the organic electro luminescent panel
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`so that the first and second voltages are applied to the first and second current
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`supply lines, respectively.
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`FIG. 4 is a plan view showing current supply lines of an organic electro
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`supply lines are shown in FIG. 3. The current 5 luminescent display apparatus
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`arranged in the direction that is substantially in parallel with the data lines.
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`Referring to FIGS. 3 and 4, the current supply lines are electrically connected
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`to the first bridge line 53 that electrically connepts the first station 51 to the second
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`station 52 through contact holes. The number of the current supply lines is
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`panel 50. electro luminescent of the organic 10 determined in response to a resolution
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`The first bridge line 53 includes aluminum neodymium (AlNd) of about 3000A ..
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`The first bridge line 53 and the data lines may be formed from a same layer.
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`FIG. 5 is a circuit diagram showing a resistance of an organic electro
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`luminescent panel in accordance with an exemplary embodiment of the present
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`current supply line (VDD line) is 15 invention. A voltage drop of a predetermined
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`The organic electro luminescent panel includes a video graphics array
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`calculated.
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`(VGA) mode. A resolution of the organic electro luminescent panel is 640X480X3.
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`A cathode resistance of the organic electro luminescent panel is negligible.
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`Referring to FIG. 5, 480 pixels are electrically connected to each of the
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`in parallel. A line resistance 20 current supply lines (VDD Lines) in substantially
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`(Lv) corresponding to an n-th pixel is formed between a portion of the current
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`supply line disposed between two adjacent pixels. One of the two adjacent pixels
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`is then-th pixel. In addition, a contact resistance (Re) between the current supply
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`line and the bridge line, and a fan-out line resistance (Rp) of the current supply line
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`an n-th pixel panel. Furthermore, 25 are formed in the organic electro luminescent
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`resistance (P[n]) corresponding to then-th pixel, and a partial sum resistance (Rv[n])
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`that is a summation of the pixel resistances (P[n, n+ 1, ... , 480]) and the line
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`11
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`IPR2020-01546
`Apple EX1007 Page 13
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`

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`WO 2004/090853
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`PCT/KR2004/000787
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`resistances (Lv) corresponding to then-th to 480th pixels are fom1ed in the organic
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`tlectro luminescent panel. A VDD voltage ('v\r[n]) is applied to then-th pixeL
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`Table 1 represents the line resistance (Lv), the contact resistance (Re), the
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`fan-out line resistance (Rp ), the pixel resistance (P) and the VDD voltage (Vv) of a
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`5 predetermined pixel.
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`Table 1
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`Re 0.00214[0
`]
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`AlNd (Gate)/ Mo,i\T (Data)
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`Rp
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`55[0]
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`Mo'vV (Thickness 3000A, Width 7p,m)
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`Lv 1 l.O[Q]
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`Pitch of Pixel 200 µ,111
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`P[n] 22.5[0]
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`VDD lO[Volts]
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`The resistance (Rv[479]) sensed at a 479th pixel is derived by the following
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`Equation 1.
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`Equation 1
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`10
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`+ 1/P[479]
`1/Rv[479] = 1/(Lv + P[480])
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`The resistance (Rv[n]) sensed at the n-th pixel is derived by the following
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`Equation 2.
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`Equation 2
`1/Rv[n] = 1/(Lv + Rv[n+ 1]) + 1/P[n]
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`supply of the current the portion 15 The line resistance (Lv) is formed between
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`line disposed between the n-th pixel and an n-1-th pixel. Also, the n-th pixel
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`resistance (P[n]) corresponding to the n-th pixel, and the partial sum resistance
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`(Rv[n]) that is the summation of the pixel resistances (P[n, n+ 1, ... , 480]) and the
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`line resistances (Lv) corresponding to the n-th to 480th pixels are formed in the
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`a predetennined panel. The n-th pixel may display 20 organic electro luminescent
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`gray color.
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`The voltage (Vv[l]) sensed at the first pixel is derived by the following
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`12
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`IPR2020-01546
`Apple EX1007 Page 14
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`WO 2004/090853
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`Equation 3.
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`
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`Equation 3
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`Vv[l ] = Rv[l]-VDD/(Rc + Rp + Rv[l ])
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`The voltage (Vv[n]) sensed at the n-th pixel is derived by the following
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`5 Equation 4.
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`Equation 4
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`Vv[n] = Rv[n]-Vv[n-1]/(Lv + Rv[n])
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`The line resistance (Lv) is formed between the portion of the current supply
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`line disposed between the n-th pixel and the n-l st pixel. Also, the partial sum
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`(P[n, n+l, ... , 480]) of the pixel resistances 10 resistance (Rv[n]) that is the summation
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`and the line resistances (Lv) corresponding to then-th to 480th pixels are formed in
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`the organic electro luminescent panel. The VDD voltage (Vv[n]) is applied to the
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`n-th pixel.
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`FIG. 6 is a graph showing a relationship between a voltage of an organic
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`15 electro luminescent panel
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`luminescent panel includes the video graphics array (VGA) mode. The resolution
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`and the number of pixels. The organic electro
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`of the organic electro luminescent panel is 640X480X3. The current supply lines
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`are arranged in the direction that is substantially in parallel with the data lines. The
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`data lines are extended in the longitudinal direction. Each of the current supply
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`of the current (AlNd). The thiclrness 20 lines includes the aluminum-neodymium
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`supply line is about 3000 A.
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`When all the pixels display a black gray color, a voltage drop is represented
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`by a curve 'I'. When the first to 120th pixels display a white gray color and the
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`121st to 480th pixels display the black gray color, a voltage drop is represented by a
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`25 curve 'II'. When the first to 240th pixels display the white gray color and the 241 st
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`to 480th pixels displays the black gray color, a voltage drop is represented by a
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`curve 'III'. When the first to 360th pixels display the white gray color and the
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`13
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`IPR2020-01546
`Apple EX1007 Page 15
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`WO 2004/090853
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`PCT /KR2004/000787
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`361st to 480th pixels displays the black gray color, a voltage drop is represented by
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`a curve 'IV'. When all the pixels display the white gray color, a voltage drop is
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`represented by a curve 'V'.
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`Referring to FIG. 6, the voltage drop increases in proportion to the number of
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`5 the pixels. That is, the voltage drop corresponding to the direction that is
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`substantially in parallel with the current supply lines (VDD Lines) increases in
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`proportion to a distance between a voltage source and each of the pixels. Also, the
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`voltage drop increases in proportion to the number of the pixels that display the
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`white gray color. When all the pixels display the white gray color, the voltage drop
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`10 is about 0.55 [Volts].
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`The current supply lines are substantially in parallel with the data lines.
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`When the current supply lines are substantially in parallel with the data lines, a
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`longitudinal cross-talk may be formed. Alternatively, the current supply lines may
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`be substantially in parallel with the scan lines. When the current supply lines are
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`cross-talk may be formed.