JP5073544B2 - 表示装置 - Google Patents
表示装置 Download PDFInfo
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- JP5073544B2 JP5073544B2 JP2008079795A JP2008079795A JP5073544B2 JP 5073544 B2 JP5073544 B2 JP 5073544B2 JP 2008079795 A JP2008079795 A JP 2008079795A JP 2008079795 A JP2008079795 A JP 2008079795A JP 5073544 B2 JP5073544 B2 JP 5073544B2
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- 239000003990 capacitor Substances 0.000 claims description 25
- 239000010409 thin film Substances 0.000 claims description 25
- 229910052809 inorganic oxide Inorganic materials 0.000 claims description 17
- 239000011159 matrix material Substances 0.000 claims description 11
- 239000000758 substrate Substances 0.000 claims description 10
- 229910052733 gallium Inorganic materials 0.000 claims 1
- 229910052738 indium Inorganic materials 0.000 claims 1
- 239000002184 metal Substances 0.000 claims 1
- 229910052751 metal Inorganic materials 0.000 claims 1
- 229910044991 metal oxide Inorganic materials 0.000 claims 1
- 150000004706 metal oxides Chemical class 0.000 claims 1
- 229910052725 zinc Inorganic materials 0.000 claims 1
- 239000010408 film Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 3
- 229910021417 amorphous silicon Inorganic materials 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005401 electroluminescence Methods 0.000 description 2
- 230000014509 gene expression Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 2
- 229920005591 polysilicon Polymers 0.000 description 2
- 229920001621 AMOLED Polymers 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- ORQBXQOJMQIAOY-UHFFFAOYSA-N nobelium Chemical compound [No] ORQBXQOJMQIAOY-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- 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
- G09G3/3258—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 voltage across the light-emitting element
-
- 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]
- G09G3/3266—Details of drivers for scan electrodes
-
- 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
- G09G2300/0421—Structural details of the set of electrodes
- G09G2300/043—Compensation electrodes or other additional electrodes in matrix displays related to distortions or compensation signals, e.g. for modifying TFT threshold voltage in column driver
-
- 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
- G09G2300/0819—Several active elements per pixel in active matrix panels used for counteracting undesired variations, e.g. feedback or autozeroing
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
- G09G2330/02—Details of power systems and of start or stop of display operation
- G09G2330/021—Power management, e.g. power saving
-
- 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]
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Electroluminescent Light Sources (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Control Of El Displays (AREA)
Description
Vprg=VGS−VB ・・・ (2)
本発明の第2の画素回路は、発光素子と、該発光素子のアノード端子にソース端子が接続され、発光素子に駆動電流を流す駆動用トランジスタと、該駆動用トランジスタのゲート端子に接続される容量素子と、該容量素子の上記ゲート端子側の一方の端子と所望のプログラム信号が流されるデータ線との間に接続されるスイッチング用トランジスタとを備えた画素回路において、駆動用トランジスタが、オフ動作する閾値電圧が負電圧である無機酸化膜薄膜トランジスタから構成され、発光素子のカソード端子と容量素子の他方の端子とが所定の共通電圧を供給する共通電源に接続されていることを特徴とする。
Vprg=VGS−VB+Vf・・・ (4)
Vprg=VGS+VB
に設定される。
Vcs=Vprg−VB=VGS
となる。
Vprg≧0v
なので、容量素子11cに設定可能な電圧値Vcsの最小電圧値Vcsminは、
Vcsmin=−VBとなる。
VB≧−VTH
となるように設定する必要がある。
Vscan(off)≦VTH
Vscan(on)≧Vprgmax+VTH
に設定する必要があり、走査信号は負電圧から正電圧までの振幅が必要となる。なお、Vprgmaxは、有機EL発光素子11aの最大輝度に応じたプログラム信号の電圧値である。
なお、Vfは、駆動用トランジスタ11bのゲート−ソース間電圧VGSの場合における有機EL発光素子11aの順方向電圧降下値である。
11 画素回路
11a 有機EL発光素子
11b 駆動用トランジスタ
11c 容量素子
11d スイッチング用トランジスタ
12 データ駆動回路
13 走査駆動回路
14 データ線
15 走査線
16 共通電源回路
17 共通電源線
21 画素回路
101 有機EL発光素子
102 駆動用トランジスタ
103 容量素子
104 スイッチング用トランジスタ
Claims (4)
- 発光素子と、該発光素子のカソード端子にドレイン端子が接続され、前記発光素子に駆動電流を流す駆動用トランジスタと、該駆動用トランジスタのゲート端子に接続される容量素子と、該容量素子の前記ゲート端子側の一方の端子と所望のプログラム信号が流されるデータ線との間に接続されるスイッチング用トランジスタとを備えた画素回路であって、前記駆動用トランジスタが、オフ動作する閾値電圧が負電圧である無機酸化膜薄膜トランジスタから構成された画素回路が多数配列されたアクティブマトリクス基板と、
前記プログラム信号を供給するデータ駆動回路と、
前記駆動用トランジスタのソース端子と前記容量素子の他方の端子とに所定の共通電圧を供給する共通電源とを備え、
前記データ駆動回路によって供給される前記プログラム信号の電圧値Vprgが、
Vprg≧0であり、
前記共通電源が、前記スイッチング用トランジスタがオンされて前記プログラム信号の電圧値Vprgが前記駆動用トランジスタのゲート端子に印加される際に前記共通電圧を供給するものであり、
前記共通電圧VBと前記駆動用トランジスタの閾値電圧VTHとが、
VB≧−VTH
を満たすような値に設定されていることを特徴とする表示装置。 - 発光素子と、該発光素子のアノード端子にソース端子が接続され、前記発光素子に駆動電流を流す駆動用トランジスタと、該駆動用トランジスタのゲート端子に接続される容量素子と、該容量素子の前記ゲート端子側の一方の端子と所望のプログラム信号が流されるデータ線との間に接続されるスイッチング用トランジスタとを備えた画素回路であって、前記駆動用トランジスタが、オフ動作する閾値電圧が負電圧である無機酸化膜薄膜トランジスタから構成された画素回路が多数配列されたアクティブマトリクス基板と、
前記プログラム信号を供給するデータ駆動回路と、
前記発光素子のカソード端子と前記容量素子の他方の端子とに所定の共通電圧を供給する共通電源とを備え、
前記データ駆動回路によって供給される前記プログラム信号の電圧値Vprgが、
Vprg≧0であり、
前記共通電源が、前記スイッチング用トランジスタがオンされて前記プログラム信号の電圧値Vprgが前記駆動用トランジスタのゲート端子に印加される際に前記共通電圧を供給するものであり、
前記共通電圧VBと前記駆動用トランジスタの閾値電圧VTHとが、
VB≧−VTH
を満たすような値に設定されていることを特徴とする表示装置。 - 前記共通電源が、前記スイッチング用トランジスタがオフされた際に、前記共通電圧としてゼロ電圧を供給するものであることを特徴とする請求項1または2記載の表示装置。
- 前記駆動用トランジスタが、In,GaおよびZnの少なくとも1つの金属元素を含む金属酸化物から構成されるものであることを特徴とする請求項1から3いずれか1項記載の表示装置。
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2008079795A JP5073544B2 (ja) | 2008-03-26 | 2008-03-26 | 表示装置 |
US12/412,063 US8502814B2 (en) | 2008-03-26 | 2009-03-26 | Pixel circuit and display apparatus |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2008079795A JP5073544B2 (ja) | 2008-03-26 | 2008-03-26 | 表示装置 |
Publications (3)
Publication Number | Publication Date |
---|---|
JP2009237006A JP2009237006A (ja) | 2009-10-15 |
JP2009237006A5 JP2009237006A5 (ja) | 2010-09-02 |
JP5073544B2 true JP5073544B2 (ja) | 2012-11-14 |
Family
ID=41116401
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2008079795A Active JP5073544B2 (ja) | 2008-03-26 | 2008-03-26 | 表示装置 |
Country Status (2)
Country | Link |
---|---|
US (1) | US8502814B2 (ja) |
JP (1) | JP5073544B2 (ja) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SG183798A1 (en) * | 2010-04-02 | 2012-10-30 | Sharp Kk | Display device and drive method therefor |
JP2012068597A (ja) * | 2010-09-27 | 2012-04-05 | Toshiba Corp | アクティブマトリクス型有機el表示装置およびその駆動方法 |
US9564478B2 (en) | 2013-08-26 | 2017-02-07 | Apple Inc. | Liquid crystal displays with oxide-based thin-film transistors |
US9818765B2 (en) | 2013-08-26 | 2017-11-14 | Apple Inc. | Displays with silicon and semiconducting oxide thin-film transistors |
TWI594221B (zh) * | 2013-11-12 | 2017-08-01 | 友達光電股份有限公司 | 像素結構及其驅動方法 |
US9543370B2 (en) | 2014-09-24 | 2017-01-10 | Apple Inc. | Silicon and semiconducting oxide thin-film transistor displays |
US9818344B2 (en) | 2015-12-04 | 2017-11-14 | Apple Inc. | Display with light-emitting diodes |
TWI773148B (zh) * | 2021-02-23 | 2022-08-01 | 友達光電股份有限公司 | 源極驅動電路及其驅動方法 |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5684365A (en) | 1994-12-14 | 1997-11-04 | Eastman Kodak Company | TFT-el display panel using organic electroluminescent media |
US7379039B2 (en) * | 1999-07-14 | 2008-05-27 | Sony Corporation | Current drive circuit and display device using same pixel circuit, and drive method |
CN1221933C (zh) * | 2000-07-07 | 2005-10-05 | 精工爱普生株式会社 | 驱动电流驱动元件的驱动电路及其方法 |
US7569849B2 (en) * | 2001-02-16 | 2009-08-04 | Ignis Innovation Inc. | Pixel driver circuit and pixel circuit having the pixel driver circuit |
WO2002067327A2 (en) * | 2001-02-16 | 2002-08-29 | Ignis Innovation Inc. | Pixel current driver for organic light emitting diode displays |
JP2002278504A (ja) * | 2001-03-19 | 2002-09-27 | Mitsubishi Electric Corp | 自発光型表示装置 |
JP4085636B2 (ja) * | 2002-01-23 | 2008-05-14 | カシオ計算機株式会社 | 記憶駆動式表示装置の駆動方法及び記憶駆動式表示装置 |
JP3956347B2 (ja) | 2002-02-26 | 2007-08-08 | インターナショナル・ビジネス・マシーンズ・コーポレーション | ディスプレイ装置 |
JP4108633B2 (ja) * | 2003-06-20 | 2008-06-25 | シャープ株式会社 | 薄膜トランジスタおよびその製造方法ならびに電子デバイス |
KR100686335B1 (ko) * | 2003-11-14 | 2007-02-22 | 삼성에스디아이 주식회사 | 표시장치 및 그의 구동방법 |
JP2006285116A (ja) * | 2005-04-05 | 2006-10-19 | Eastman Kodak Co | 駆動回路 |
JP2008009275A (ja) * | 2006-06-30 | 2008-01-17 | Canon Inc | 有機el表示装置及びその駆動方法 |
-
2008
- 2008-03-26 JP JP2008079795A patent/JP5073544B2/ja active Active
-
2009
- 2009-03-26 US US12/412,063 patent/US8502814B2/en active Active
Also Published As
Publication number | Publication date |
---|---|
JP2009237006A (ja) | 2009-10-15 |
US8502814B2 (en) | 2013-08-06 |
US20090244057A1 (en) | 2009-10-01 |
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