JP5652810B2 - 有機電界発光表示装置及びその駆動方法 - Google Patents
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- 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
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- 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
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- 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
-
- 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
- G09G2320/06—Adjustment of display parameters
- G09G2320/0626—Adjustment of display parameters for control of overall brightness
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- 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
- G09G2330/022—Power management, e.g. power saving in absence of operation, e.g. no data being entered during a predetermined time
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- Control Of El Displays (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Electroluminescent Light Sources (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Description
Claims (11)
- 走査線に走査信号を順次供給するための走査駆動部と、
前記走査信号と同期されるようにデータ線に映像を表示する画素の有機発光ダイオードを駆動するためのデータ信号を供給するデータ駆動部と、
前記走査線及びデータ線の交差部に位置する前記画素と、
前記画素が有する第2駆動トランジスタを飽和領域で駆動して画像を表示する正常駆動モードと、前記第2駆動トランジスタを線形領域で駆動して最小限の情報のみを表示する待機駆動モードを判別するためのタイミング制御部と、
前記画素に供給される第1電源と第2電源を生成し、前記正常駆動モードで前記第1電源と前記第2電源間の電圧差を第1電圧に設定し、前記待機駆動モードで前記第1電源と前記第2電源間の電圧差を前記第1電圧と異なる第2電圧に設定する電源部と、
カソード電極が前記第2電源と接続される前記有機発光ダイオードと、第1〜第6駆動トランジスタと、電圧を充電するキャパシタとを含む、前記画素の画素回路と、
を備え、
前記電源部は、前記第5および第6駆動トランジスタの駆動を制御するための発光制御電源と、前記画素を駆動するためのデータ信号の電圧のうち最も低い電圧以下の電圧に設定される初期化電源とを更に生成し、
前記データ信号および前記初期化電源に基づいて、前記キャパシタに前記信号データおよび前記第2駆動トランジスタの閾値電圧に対応する電圧が充電され、前記第2駆動トランジスタの閾値に関わらず、前記発光制御電源の制御信号に基づいて、前記第1電源から当該充電された電圧に対応する電流が前記有機発光ダイオードに供給され、
前記画素回路は、
前記データ線と第1ノードの間に接続され、ゲート電極が前記走査線に接続される前記第1駆動トランジスタと、
前記第1ノードと前記第6駆動トランジスタとの間に接続され、ゲート電極が前記キャパシタの一端に接続されて、前記有機発光ダイオードに供給される電流量を制御する前記第2駆動トランジスタと、
前記第2駆動トランジスタのゲート電極と当該第2駆動トランジスタの一端との間にダイオード形態で接続され、ゲート電極が前記走査線に接続される前記第3駆動トランジスタと、
前記キャパシタの一端と前記初期化電源との間に接続され、ゲート電極が他の画素に対する前記走査信号線に接続される前記第4駆動トランジスタと、
前記第1ノードと前記第1電源の間に接続され、ゲート電極が前記発光制御電源に接続される前記第5駆動トランジスタと、
前記第2駆動トランジスタの一端と前記有機発光ダイオードのアノード電極との間に接続され、ゲート電極が前記発光制御電源に接続される前記第6駆動トランジスタと、
を備え、
前記データ駆動部の出力端子と前記データ線との間に接続され、前記正常駆動モード期間に前記出力端子から供給されるデータ信号を前記データ線に伝達し、前記待機駆動モード期間に、第3電源または第4電源を前記データ線に伝達するためのスイッチ部を更に備え、
前記第3電源は、前記画素に含まれる全ての前記駆動トランジスタが完全にターンオンされ得る電圧であり、前記データ信号の最低電圧以下の電圧に設定され、
前記第4電源は、前記画素に含まれる全ての前記駆動トランジスタが完全にターンオフされ得る電圧であり、前記データ信号の最低電圧以下の電圧に設定され、
前記スイッチ部は、前記待機駆動モード期間中、前記走査線に走査信号が供給されない場合に前記第3電源の電圧を前記データ線の寄生キャパシタに充電し、前記走査線に走査信号が供給される場合に当該充電された第3電源の電圧または前記第4電源の電圧を前記画素に供給することを特徴とする有機電界発光表示装置。 - 前記第1電圧は、前記第2電圧より高い電圧であることを特徴とする請求項1に記載の有機電界発光表示装置。
- 前記データ駆動部は前記正常駆動モードで多様な階調を実現できる前記データ信号を供給し、前記待機駆動モードで前記画素の発光又は非発光のみを決定する前記データ信号を供給することを特徴とする請求項1または2に記載の有機電界発光表示装置。
- 前記待機駆動モードで、前記データ駆動部は、前記第2駆動トランジスタが完全にターンオン又はターンオフされ得る前記データ信号を供給することを特徴とする請求項1〜3のいずれか一項に記載の有機電界発光表示装置。
- 前記待機駆動モードで、前記画素は、前記第2駆動トランジスタがスイッチ駆動しながら映像を表示することを特徴とする請求項1〜4のいずれか一項に記載の有機電界発光表示装置。
- 前記スイッチ部は、
前記出力端子及びデータ線のそれぞれの間に設置され、前記タイミング制御部から供給される第1制御信号に対応して前記正常駆動モード期間にターンオン状態を維持し、前記待機駆動モード期間にターンオフ状態を維持する第10トランジスタと、
前記第4電源及びデータ線のそれぞれの間に設置され、前記出力端子に供給される電圧に対応して前記待機駆動モード期間にターンオン又はターンオフされる第11トランジスタと、
前記第3電源及び前記データ線の間に1つ以上設置され、前記タイミング制御部から供給される第2制御信号に対応して前記待機駆動モード期間にターンオン又はターンオフを繰り返す第12トランジスタと、
を備えることを特徴とする請求項1〜5のいずれか一項に記載の有機電界発光表示装置。 - 前記第12トランジスタは前記待機駆動モード中、前記走査信号が供給される期間にターンオフされ、走査信号が供給されない期間にターンオンされて前記第3電源の電圧を前記データ線に供給することを特徴とする請求項6に記載の有機電界発光表示装置。
- 前記第11トランジスタは前記待機駆動モード中、前記走査信号が供給される期間に前記走査信号に選択された画素が非発光状態に設定される場合にターンオンされ、その他の場合にターンオフされることを特徴とする請求項6または7に記載の有機電界発光表示装置。
- 請求項1〜8のいずれか一項に記載の有機電界発光表示装置を駆動する方法において、
前記画素が有する前記第2駆動トランジスタを飽和領域で駆動して映像を表示するための正常駆動モード、又は前記第2駆動トランジスタを線形領域で駆動して最小限の情報のみを表示するための待機駆動モードであるかを判別する段階と、
前記正常駆動モードの場合、前記第2駆動トランジスタが飽和領域で駆動され得るように前記第1電源及び第2電源の電圧を設定し、前記データ線にデータ信号を伝達する段階と、
前記待機駆動モードの場合、前記第2駆動トランジスタが線形領域で駆動され得るように前記第1電源及び第2電源の電圧を設定する段階と、
前記発光制御電源の制御信号を生成する段階と、
前記初期化電源を生成する段階と、
前記データ線上の信号および前記初期化電源に基づいて、前記キャパシタに当該信号データおよび前記第2駆動トランジスタの閾値電圧に対応する電圧を充電する段階と、
前記第2駆動トランジスタの閾値に関わらず、前記発光制御電源の制御信号に基づいて、前記第1電源から当該充電された電圧に対応する電流を前記有機発光ダイオードに供給する段階と、
前記待機駆動モード期間中、前記走査線に走査信号が供給されない場合に前記第3電源の電圧を前記データ線の寄生キャパシタに充電し、前記走査線に走査信号が供給される場合に当該充電された第3電源の電圧または前記第4電源の電圧を前記データ線に伝達する段階と、
を含むことを特徴とする有機電界発光表示装置の駆動方法。 - 前記正常駆動モードの場合、前記画素で多様な階調の映像が表示され得るようにデータ信号の電圧が設定されることを特徴とする請求項9に記載の有機電界発光表示装置の駆動
方法。 - 前記待機駆動モードの場合、前記第2駆動トランジスタがスイッチ駆動されて前記画素が発光又は非発光状態で制御されるように前記データ信号の電圧が設定されることを特徴とする請求項9または10に記載の有機電界発光表示装置の駆動方法。
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KR1020090096108A KR101100947B1 (ko) | 2009-10-09 | 2009-10-09 | 유기전계발광 표시장치 및 그의 구동방법 |
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EP2317499A3 (en) | 2011-07-06 |
US9437134B2 (en) | 2016-09-06 |
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EP2317499A2 (en) | 2011-05-04 |
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