TWI252052B - Electroluminescence display device - Google Patents
Electroluminescence display device Download PDFInfo
- Publication number
- TWI252052B TWI252052B TW093103020A TW93103020A TWI252052B TW I252052 B TWI252052 B TW I252052B TW 093103020 A TW093103020 A TW 093103020A TW 93103020 A TW93103020 A TW 93103020A TW I252052 B TWI252052 B TW I252052B
- Authority
- TW
- Taiwan
- Prior art keywords
- driving
- organic
- display device
- tft
- pixel
- Prior art date
Links
- 238000005401 electroluminescence Methods 0.000 title claims abstract description 11
- 230000005284 excitation Effects 0.000 claims description 3
- 230000003287 optical effect Effects 0.000 claims 1
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 239000010410 layer Substances 0.000 description 25
- 239000003990 capacitor Substances 0.000 description 7
- 239000000758 substrate Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- 239000010408 film Substances 0.000 description 3
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 230000005525 hole transport Effects 0.000 description 2
- 239000011229 interlayer Substances 0.000 description 2
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 2
- 229920005591 polysilicon Polymers 0.000 description 2
- YZCKVEUIGOORGS-OUBTZVSYSA-N Deuterium Chemical group [2H] YZCKVEUIGOORGS-OUBTZVSYSA-N 0.000 description 1
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 239000008280 blood Substances 0.000 description 1
- 210000004369 blood Anatomy 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 229910052805 deuterium Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229910052736 halogen Inorganic materials 0.000 description 1
- 150000002367 halogens Chemical class 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 230000005923 long-lasting effect Effects 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/10—OLED displays
- H10K59/12—Active-matrix OLED [AMOLED] displays
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C53/00—Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
- B29C53/56—Winding and joining, e.g. winding spirally
- B29C53/58—Winding and joining, e.g. winding spirally helically
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C53/00—Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
- B29C53/80—Component parts, details or accessories; Auxiliary operations
- B29C53/8008—Component parts, details or accessories; Auxiliary operations specially adapted for winding and joining
- B29C53/8083—Improving bonding of wound materials or layers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C59/00—Surface shaping of articles, e.g. embossing; Apparatus therefor
- B29C59/02—Surface shaping of articles, e.g. embossing; Apparatus therefor by mechanical means, e.g. pressing
- B29C59/04—Surface shaping of articles, e.g. embossing; Apparatus therefor by mechanical means, e.g. pressing using rollers or endless belts
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
- G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
- G09G3/3225—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix
- G09G3/3233—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix with pixel circuitry controlling the current through the light-emitting element
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L27/00—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
- H01L27/02—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers
- H01L27/12—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being other than a semiconductor body, e.g. an insulating body
- H01L27/1214—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being other than a semiconductor body, e.g. an insulating body comprising a plurality of TFTs formed on a non-semiconducting substrate, e.g. driving circuits for AMLCDs
- H01L27/1259—Multistep manufacturing methods
- H01L27/1296—Multistep manufacturing methods adapted to increase the uniformity of device parameters
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/80—Constructional details
- H10K59/84—Parallel electrical configurations of multiple OLEDs
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2009/00—Layered products
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2023/00—Tubular articles
- B29L2023/22—Tubes or pipes, i.e. rigid
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2300/00—Aspects of the constitution of display devices
- G09G2300/04—Structural and physical details of display devices
- G09G2300/0439—Pixel structures
- G09G2300/0443—Pixel structures with several sub-pixels for the same colour in a pixel, not specifically used to display gradations
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2300/00—Aspects of the constitution of display devices
- G09G2300/08—Active matrix structure, i.e. with use of active elements, inclusive of non-linear two terminal elements, in the pixels together with light emitting or modulating elements
- G09G2300/0809—Several active elements per pixel in active matrix panels
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2300/00—Aspects of the constitution of display devices
- G09G2300/08—Active matrix structure, i.e. with use of active elements, inclusive of non-linear two terminal elements, in the pixels together with light emitting or modulating elements
- G09G2300/0809—Several active elements per pixel in active matrix panels
- G09G2300/0842—Several active elements per pixel in active matrix panels forming a memory circuit, e.g. a dynamic memory with one capacitor
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0233—Improving the luminance or brightness uniformity across the screen
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
- G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
- G09G3/3275—Details of drivers for data electrodes
- G09G3/3291—Details of drivers for data electrodes in which the data driver supplies a variable data voltage for setting the current through, or the voltage across, the light-emitting elements
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/10—OLED displays
- H10K59/12—Active-matrix OLED [AMOLED] displays
- H10K59/121—Active-matrix OLED [AMOLED] displays characterised by the geometry or disposition of pixel elements
Landscapes
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Mechanical Engineering (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Manufacturing & Machinery (AREA)
- Theoretical Computer Science (AREA)
- Electroluminescent Light Sources (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Control Of El Displays (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Description
1252052 玖、發明說明: 【發明所屬之技術領域】 本舍明係關於一種電激發光(EL,electroluminescence) 顯不裝置’尤其是關於在各畫素具有畫素選擇用電晶體以 及用以電流驅動電激發光元件之驅動用電晶體之電激發光 顯示裝置。 【先前技術】 近年來’採用有機電激發光⑴rganic Electro LumineSCece :以下簡稱「有機EL」)元件之有機EL顯示 裝置正以取代CRT及LCD的顯示裝置而備受矚目。尤其 已開毛種具備薄膜電晶體(Thin Film Transistor :以下簡 稱「TFT」)之有機EL顯示裝置作為驅動有機EL元件之開 關元件。 第3圖係顯示有機el顯示面板内之一畫素之等效電 路囷在貫際的有機EL顯示面板中,該畫素係複數配置 成列m行的矩陣’其係使供給閘極信號Gn的閘極信號 線50與供給顯示信號Dm的汲極信號線5丨相互交又。 在该等兩信號線的交叉點附近,係配置有有機El元 件52以及驅動該有機EL元件52之驅動用TFT 53、用以 遙擇畫素的晝素選擇用TFT 54。 在驅動用TFT 53的源極中,係由電源線55供給正電 源電壓PVdd。此外,該驅動用TFT 53之汲極係連接於有 機EL元件52之陽極。在有機EL元件52之陰極則供給 負電源電壓CV。 315514 5 1252052 在畫素選擇用ΤΡΤ54< 50來供給閑極信號Gn,而在;精由連接閘極信號線 5牝則連接有汲極二4擇用TFT 54之沒極 選擇…4之源極54s係連I,示信號加。畫素 TFT53"" 出。顯干fn 圖不之垂直驅動器電路輸 出顯不#唬Dm係由未圖示 ..如 ㈡下之水平驅動器電路輸出。 冉者,在驅動用TFT 53之閜托$祕本 ^ ^ r ^ m ,極連接有保持電容Cs。 保持電奋Cs係用以藉由保持盥 r ^ . m "、”、、員不彳δ唬Dni相對應的電 何,而在一圖框(field)期間保 幵硝不畫素之顯示信號而設 I 。 兹說明上述構成之EL顯㈣n作。當閘極信號 η到水平期間面位準時,畫素選擇用TFT 54即導 通。如此-來,顯示信號Dm即從汲極信號線51透過畫素 遥擇用TFT 54,施加至驅動用TFT 53之閘極。 然後,驅動用TFT 53之導電性(⑽⑽啊)即依據供 給至該驅動用TFT 53之閘極的顯示信號Dm而變化,且與 其相對應的驅動電流即透過驅動用TFT 53而供給至有機 EL元件52,使有機EL元件52點亮。當驅動用tft53依 據供給至該驅動用TFT 53之閘極的顯示信號Dm而呈關斷 狀態時,由於電流未流動於驅動用TFT 53,故有機EL元 件5 2亦熄滅。 另外’在相關的先行技術文獻中,有如下的專利文獻 [專利文獻1 ] 315514 6 1252052 曰本特開2002-175 029號公報 【發明内容】 [發明欲解決之問題] …、句’由於製造上的原因,使得驅動用TFT 53之特 唑例如其閾值電壓(threshold voltage)在畫素間極為夂 故驅動用TFT 53之電流驅動能力會依每一晝素而 有不同因此,有機EL元件52之發光亮度即依每一書素 而有不同,結果,有產生有機EL顯示面板的顯示不 虞。 < [解決問題之手段] 徵為具備複 擇各畫素之 通過前述畫 電激發光元 動用電晶體 元件分割配 本發明係有鐘於上述問題而研創者,其特 婁旦素各晝素係具有··因應閘極信號而選 畫素選擇用電晶體;電激發光元件;以及因應 素選擇用電晶體所供給之顯示信號而驅動前述 件之驅㈣電晶體,而且,依各晝素將前述驅 分割成複數個並加以配置,並將前述電激發光 置,俾與所分割的各驅動電晶體相對應。 藉此,由於可使在畫素間的 況減少,故可防止有機EL顯示 [實施方式】 [發明之實施形態] 驅動電晶體之特性 面板的顯示不均。 參差 情 明有關本發明實施形態之有 此有機:EL顯示裳置之一書 其次’茲筝照圖式詳細說 機EL顯示裝置。第1圖係構成 素等效電路圖。 315514 7 1252052 其中’供給閘極信號Gn之閘極作声 II - ^ j ΰ乜唬線1 〇,係與供給 ^Dm之汲極信號線11相互交又1後,在畫素内 配置分割成4個的P通道型驅動用TFT12、13、14、卜, 且於該等驅動用TFT 12、u、1 5之各個汲極連接至 、、工刀告丨J的有機EL元件16、17、18 lr ^ ^ 19之陽極。然後,在 驅動用TFT 12、13、14、15之丘诵、、原托士 仏正之,、通源極中,係連接有供 -正電源電壓PVdd的電源線20。有機el元件ΐ6、η、 1 8、19之陰極係為共通,其供給有負電源電壓π。 “此外,在N通道型畫素選擇用加21之問極中,係 精由連接閘極信號線10而供給閘極信號⑼ =用TFT21之没極21d則連接有沒極信號、線 、口顯不㈣Dm。畫素選擇用TFT21之源極a 連接於4個驅動用TFT 12、13、14、15之門托 ^ ^ ^ 之閘極。在此, 甲極信號Gn係由未圖示之垂直驅動器電路輸出 rx y "、、貝不 k 〜111係由未圖示之水平驅動器電路輸出。 此外,4個驅動用TFT 12、13、14、1 s夕#、艾 伤、* ^ 1 5之共通閘極中 :、連接有保持電容Cs。保持電容〇係用以藉由保持㈣ 不L嬈Dm相對應的電荷,而在一圖框(field)期 示晝素之顯*信號所設者。 ’θ保持顯 依據本實施形態,由於係將i個晝素内之驅動用加 刀口u為4個,故即使驅動用TFT 12、13、1 4、1 ς 久古e 〇之特性 有變異,其變異亦將在畫素内被平均化,且血 內 ’、具他晝素 之驅動用電晶體之間的特性參差情形亦會減 一” gp /i . 例如, 丨1之在1個晝素内被分割的驅動用TFT 12之閨值徵上 315514 8 1252052 剩餘的任何驅動用TFT(例如驅動用τρτ 13)之閾值只要適 當的低,則該晝素的亮度即會以該閾值適當低的驅動用 TFT 1 7來決定。因此,可儘量縮小晝素間的亮度不均。 第2圖係顯示有關有機EL顯示裝置之一晝素之圖案 佈局例圖(平面圖)。此外’第3圖係沿第2圖χ_Χ線之剖 視圖。 其中,供給閘極信號Gn之閘極信號線1 〇係朝列方向 延伸,供給顯示信號Dm之汲極信號線丨丨係朝行方向延 伸,該等信號線係相互立體交又。閘極信號線1〇係由鉻層 或鉬層等所構成,汲極信號線11係由該上層之鋁層等所構 成。 晝素選擇用TFT 21係多晶矽TFT。此畫素選擇用TFT 21係於形成在玻璃基板等透明絕緣性基板1〇〇上之多晶石夕 層所構成的主動層30上,形成閘極絕緣層(未圖示),且在 忒閘極絕緣層上,形成從閘極信號線1〇延伸之2個閘極 31、32 ’且構成雙閘極構造。 卜此畫素述擇用TFT 2 1之源極2 1 d係透過汲極 信號線11與接觸件33而連接。構成畫素選擇用TFT21 之源極2ls之多晶矽層,係延伸於保持電容領域,而該上 f之保持電容線34係透過電容絕緣膜而重疊,且以此重疊 部分而形成保持電容Cs。 且 J後從晝素選擇用TFT 2丨之源極2丨s延伸之多晶石夕 層係透過鋁配線3 6而連接於4個驅動用丁FT丨2、丨3、 1 4、1 5之共通閘極3 5。 315514 9 1252052 4個驅動用丁FT12、13、14、15係為多晶石夕tft。於 形成在玻璃基板等透明絕緣性基板1 00上之多晶石夕層所構 成的主動層1 0 1上,形成閘極絕緣層(未圖示)1 〇2,且在該 閘極絕緣層1 〇 2上,形成由鉻層或|目層等所構成之共通問 極35。在共通閘極35上形成有層間絕緣膜ι〇3。 在驅動用TFT 12、13、14、15之各源極,係透過接 觸件3 7而共通連接有供給正電源電壓p v d ς[之電源線2 〇。 例如,在驅動用TFT 12之源極12s係連接於電源線2()。 此外,驅動用TFT 12、13、14、15之各汲極,係分別連 接於有機EL元件16、17、18、19之各陽極4〇、41、42、 43。各陽極40、41、42、43係由經分割的ιτ〇所構成。 例如,驅動用TFT 12之汲極12d係透過接觸件38, 一連接至有機EL元件16之陽極40。在該上方係疊層有電 洞傳輸層44、發光層45、電子傳輸層46,且又在該上方 形成有陰極47。陰極47係與有機EL元件μ、17、18、 19共通。 一另外,在本實施形態中,雖將驅動用tft及有機El 凡件分割為4個,但分割之數量可視需要加以適當變化。 ::然會由於分割驅動用TFT及有機EL元件而使晝素面 查二加但由於該等元件之進一步微細化,仍可充分縮小 1素面積。 [發明之效果] 據本發明,由於係在一晝素内將驅動電晶體分判, 故可使在查I … 旦素間的驅動電晶體之特性參差情形減少,故可 315514 10 I252〇52 止有機EL顯示面板的顯示不均。 【圖式簡單說明】 第1圖係構成本發明之實施形態之有機EL顯示裝置 之等效電路圖。 第2圖係顯示本發明之實施形態之有機el顯示裝置 之圖案佈局例圖(平面圖)。 第3圖係沿第2圖X-X線之剖視圖。 第4圖係習知例之電激發光顯示裝置之等效電路圖。 10 閘極信號線 11 汲極信號線 12、 13 、 14 、 15 驅動用TFT 16、 1 7、1 8、1 9 有機EL元件 20 電源線 21 晝素選擇用TFT 21s 源極 21d 沒極 30 主動層 3卜 3 2閘極 33 接觸件 34 保持電容線 35 共通閘極 36 鋁配線 37、 3 8接觸件 40 - 41、42、43 陽極 44 電洞傳輸層 45 發光層 46 電子傳輸層 47 陰極 100 絕緣性基板 101 主動層 102 閘極絕緣層 103 層間絕緣膜 315514 11
Claims (1)
1252052 拾、申請專利範圍: i -種電激發光顯示裝置’其特徵為:具備複數個畫素, 而各晝素係具有:因應閘極信號而選擇各畫素之畫素選 擇用電晶體;電激發光元件;以及因應通過前述畫素選 擇用電晶體所供給之顯示信號而驅動前述電激發光元 件之驅動用電晶體, 、,而且,依各畫素將前述驅動用電晶體分割成複數個 =加以配置,亚將前述電激發光元件分割配置,俾與所 分割的各驅動電晶體相對應。 1申。月專利圍第1項之電激發光顯示襄置,其中,前 V電激lx光元件之陽極係分割成與前述被分割之各驅 動電晶體相對應。 士申Μ專利知*圍第1或第2項之電激發光顯示裝置,其 中,前述驅動用電晶體係分割配置成4個。 12 315514
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US7791571B2 (en) * | 2004-04-22 | 2010-09-07 | Semiconductor Energy Laboratory Co., Ltd. | Light emitting device and driving method of the same |
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WO2007011061A1 (en) | 2005-07-22 | 2007-01-25 | Semiconductor Energy Laboratory Co., Ltd. | Semiconductor device |
JP2007286081A (ja) * | 2006-04-12 | 2007-11-01 | Hitachi Displays Ltd | 有機el表示装置 |
US20090006198A1 (en) * | 2007-06-29 | 2009-01-01 | David George Walsh | Product displays for retail stores |
JP2010060803A (ja) * | 2008-09-03 | 2010-03-18 | Sony Corp | 表示装置、画素のレイアウト方法および電子機器 |
JP2010151879A (ja) * | 2008-12-24 | 2010-07-08 | Sony Corp | 表示装置 |
JP5310214B2 (ja) | 2009-04-13 | 2013-10-09 | ソニー株式会社 | 表示装置および電子機器 |
KR101223725B1 (ko) * | 2011-01-10 | 2013-01-17 | 삼성디스플레이 주식회사 | 유기발광표시장치 및 그 제조방법 |
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US6384427B1 (en) * | 1999-10-29 | 2002-05-07 | Semiconductor Energy Laboratory Co., Ltd. | Electronic device |
WO2003003339A1 (en) * | 2001-06-28 | 2003-01-09 | Matsushita Electric Industrial Co., Ltd. | Active-matrix el display and its driving method |
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