JP5037858B2 - 表示装置 - Google Patents
表示装置 Download PDFInfo
- Publication number
- JP5037858B2 JP5037858B2 JP2006137080A JP2006137080A JP5037858B2 JP 5037858 B2 JP5037858 B2 JP 5037858B2 JP 2006137080 A JP2006137080 A JP 2006137080A JP 2006137080 A JP2006137080 A JP 2006137080A JP 5037858 B2 JP5037858 B2 JP 5037858B2
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- Prior art keywords
- voltage
- driver element
- light emitting
- emitting element
- display device
- Prior art date
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- 238000001514 detection method Methods 0.000 claims description 30
- 239000011159 matrix material Substances 0.000 claims description 5
- ORQBXQOJMQIAOY-UHFFFAOYSA-N nobelium Chemical compound [No] ORQBXQOJMQIAOY-UHFFFAOYSA-N 0.000 description 24
- 238000000034 method Methods 0.000 description 15
- 238000005401 electroluminescence Methods 0.000 description 8
- 239000004973 liquid crystal related substance Substances 0.000 description 3
- 210000002858 crystal cell Anatomy 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
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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
- G09G3/3233—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
-
- 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
- G09G2300/0819—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
- 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
- G09G2300/0861—Several active elements per pixel in active matrix panels forming a memory circuit, e.g. a dynamic memory with one capacitor with additional control of the display period without amending the charge stored in a pixel memory, e.g. by means of additional select 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
- G09G2300/08—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
- G09G2300/0861—Several active elements per pixel in active matrix panels forming a memory circuit, e.g. a dynamic memory with one capacitor with additional control of the display period without amending the charge stored in a pixel memory, e.g. by means of additional select electrodes
- G09G2300/0866—Several active elements per pixel in active matrix panels forming a memory circuit, e.g. a dynamic memory with one capacitor with additional control of the display period without amending the charge stored in a pixel memory, e.g. by means of additional select electrodes by means of changes in the pixel supply voltage
-
- 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
- G09G2320/04—Maintaining the quality of display appearance
- G09G2320/043—Preventing or counteracting the effects of ageing
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Control Of El Displays (AREA)
- Electroluminescent Light Sources (AREA)
Description
図1に本発明の基本形態に係る表示装置の回路構成、図2にそのタイミングチャートを示す。
VSS−Vt(TFT)>=VDD−Voled
+{Coled/(Cs+Coled)}(Vp−VDD) (式2)
となるようにVpを設定する。すなわち、ドライバー素子12のドレイン電圧がそのゲートおよびソース電圧であるVSSからVt(TFT)を引いた値より低いものに設定する。
Vgs=VDD−Voled−VSS
+(Vdata−VSS){Coled/(Cs+Coled)}+Vt(式3)
となる(図3D)。
id=(β/2)(Vgs−Vt)2
=(β/2)(VDD−Voled−VSS
+(Vdata−VSS){Coled/(Cs+Coled)})2(式4)
のようになる。
図4に本発明が適用された別の表示装置の回路構成を、図5にそのタイミングチャートを示す。
VDD−Vt(TFT)
<=Voled+{Coled/(Cs+Coled)}(Vp−VDD)(式5)
となるようにVpを設定する。
Vsg=VDD−Voled−VSS
+(Vdata−VDD){Coled/(Cs+Coled)}−Vt(式6)
となる(図6D)。
id=(β/2)(Vsg+Vt)2=(β/2)(VDD−Voled−VSS+(Vdata−VDD){Coled/(Cs+Coled)})2 (式7)
以上により、ドライバー素子22の閾値電圧は補償される。
次に、本発明の実施形態に係る表示装置について説明する。図8に回路構成を、図9にそのタイミングチャートを示す。この回路構成は、上述の図4と同じであるが、図1の構成を採用してもよい。
これによって、式(7)のかわりに
よって、静電容量23には、
Claims (4)
- 供給される電流に応じて発光する発光素子と、
前記発光素子の発光輝度に対応する信号電圧を書き込むデータ書き込み手段と、
前記データ書き込み手段によって書き込まれた信号電圧に応じて前記発光素子に供給される電流値を制御する電流値制御手段と、
前記発光素子に電流を供給する電源線と、
を備えたアクティブマトリックス型の表示装置において、
前記データ書き込み手段は、
発光輝度に対応した電位を供給する信号線と、
前記信号線に発光輝度に対応した信号電圧を供給する信号線駆動回路と、
前記信号線を介して供給される信号電圧の書き込みを制御するスイッチング素子と、
前記スイッチング素子を制御する走査線と、
前記走査線を制御する走査線駆動回路と、
を備え、
前記電流値制御手段は、
前記書き込み手段によって書き込まれた信号電圧に応じて発光素子に流れる電流値を制御するドライバー素子と、
前記ドライバー素子のゲート電極に接続され、このゲート電極について、少なくとも前記書き込まれた信号電圧および前記ドライバー素子の駆動閾値電圧を、前記発光素子の発光期間の間保持する静電容量と、
を備え、
前記駆動閾値電圧は前記ドライバー素子の発光時におけるゲート電極とドレイン電極との間における駆動閾値電圧であり、
前記信号線には、前記発光素子の発光輝度に対応する信号電圧を供給する期間の間に閾値検出のための閾値検出基準電圧が供給される閾値電圧検出期間が挿入され、
前記スイッチング素子は、前記閾値電圧検出期間において導通状態であり、
前記信号線には、前記閾値電圧検出期間において、各行のデータと前記閾値検出電圧基準電圧が交互に供給される
ことを特徴とする表示装置。 - 請求項1に記載の表示装置において、
前記静電容量は第1電極が前記ドライバー素子のゲート電極に、第2電極が前記ドライバー素子のドレイン電極に接続されていることを特徴とする表示装置。 - 請求項1または2に記載の表示装置において、
さらに、
前記電源線の電圧を制御し、発光素子の導通状態と非導通状態とを切り替える電源線制御手段を備えることを特徴とする表示装置。 - 請求項1〜3のいずれか1つに記載の表示装置において、
前記ドライバー素子のゲート電極と、ドレイン電極またはソース電極との間には、短絡用のスイッチング素子が設けられていないことを特徴とする表示装置。
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2006137080A JP5037858B2 (ja) | 2006-05-16 | 2006-05-16 | 表示装置 |
US11/743,179 US20070285359A1 (en) | 2006-05-16 | 2007-05-02 | Display apparatus |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2006137080A JP5037858B2 (ja) | 2006-05-16 | 2006-05-16 | 表示装置 |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2007310034A JP2007310034A (ja) | 2007-11-29 |
JP5037858B2 true JP5037858B2 (ja) | 2012-10-03 |
Family
ID=38821388
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2006137080A Active JP5037858B2 (ja) | 2006-05-16 | 2006-05-16 | 表示装置 |
Country Status (2)
Country | Link |
---|---|
US (1) | US20070285359A1 (ja) |
JP (1) | JP5037858B2 (ja) |
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CN100380433C (zh) * | 2001-06-22 | 2008-04-09 | 统宝光电股份有限公司 | Oled电流驱动像素电路 |
JP3613253B2 (ja) * | 2002-03-14 | 2005-01-26 | 日本電気株式会社 | 電流制御素子の駆動回路及び画像表示装置 |
US7109952B2 (en) * | 2002-06-11 | 2006-09-19 | Samsung Sdi Co., Ltd. | Light emitting display, light emitting display panel, and driving method thereof |
US7612749B2 (en) * | 2003-03-04 | 2009-11-03 | Chi Mei Optoelectronics Corporation | Driving circuits for displays |
JP4608999B2 (ja) * | 2003-08-29 | 2011-01-12 | セイコーエプソン株式会社 | 電子回路の駆動方法、電子回路、電子装置、電気光学装置、電子機器および電子装置の駆動方法 |
JP5207581B2 (ja) * | 2004-07-16 | 2013-06-12 | 三洋電機株式会社 | 半導体装置または表示装置の駆動方法 |
CA2490858A1 (en) * | 2004-12-07 | 2006-06-07 | Ignis Innovation Inc. | Driving method for compensated voltage-programming of amoled displays |
JP5037795B2 (ja) * | 2005-03-17 | 2012-10-03 | グローバル・オーエルイーディー・テクノロジー・リミテッド・ライアビリティ・カンパニー | 表示装置 |
JP5007491B2 (ja) * | 2005-04-14 | 2012-08-22 | セイコーエプソン株式会社 | 電気光学装置、及び電子機器 |
JP5037832B2 (ja) * | 2006-02-17 | 2012-10-03 | グローバル・オーエルイーディー・テクノロジー・リミテッド・ライアビリティ・カンパニー | 表示装置 |
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