JP7084314B2 - 画素回路に用いる駆動方法 - Google Patents
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- 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
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- 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]
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- 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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- 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
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- 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
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- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
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- 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
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- G—PHYSICS
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- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
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- G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
- G09G2310/0243—Details of the generation of driving signals
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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
- G09G2310/00—Command of the display device
- G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
- G09G2310/0262—The addressing of the pixel, in a display other than an active matrix LCD, involving the control of two or more scan electrodes or two or more data electrodes, e.g. pixel voltage dependent on signals of two data electrodes
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- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2310/00—Command of the display device
- G09G2310/06—Details of flat display driving waveforms
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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
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/029—Improving the quality of display appearance by monitoring one or more pixels in the display panel, e.g. by monitoring a fixed reference pixel
- G09G2320/0295—Improving the quality of display appearance by monitoring one or more pixels in the display panel, e.g. by monitoring a fixed reference pixel by monitoring each display pixel
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- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
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- G09G2320/04—Maintaining the quality of display appearance
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- G09G2320/045—Compensation of drifts in the characteristics of light emitting or modulating elements
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Description
本出願は、2017年5月5日に出願された中国特許出願第201710310558.3号の優先権を主張し、上記した中国特許出願に開示されている全ての内容を引用して本出願の一部とする。
本開示は表示技術分野に関し、具体的には、画素回路に用いる駆動方法に関する。
Claims (9)
- 発光デバイスと駆動トランジスタを含む画素回路の駆動方法であって、
前記発光デバイスが動作する期間に、内部電圧補償を含む第1の補償方式で前記駆動トランジスタに対して補償を行うことと、
前記発光デバイスが動作しない期間に、内部電圧補償と外部電圧補償を含む第2の補償方式で前記駆動トランジスタに対して補償を行うことと、を含み、
前記第1の補償方式は、内部電圧補償を含み、外部電圧補償を含まず、
前記発光デバイスが動作する期間は、発光デバイスを発光するように制御する期間を意味し、前記発光デバイスが動作しない期間は、スクリーン全体がリセットの段階にあるか、又は、表示空き段階にあることを意味し、
前記第2の補償方式で前記駆動トランジスタに対して補償を行うことは、
前記駆動トランジスタに対してリセットを行うことと、
前記駆動トランジスタに対して電圧補償を行うことと、
前記画素回路へデータ信号を入力することと、
前記駆動トランジスタに流れる電流を検出し、前記電流に基づいて外部補償電圧を算出するとともに、前記外部補償電圧で前記データ信号の電圧を補償することと、を含む、
画素回路の駆動方法。 - 時間間隔に従って、前記第2の補償方式で前記駆動トランジスタに対して補償を行う、請求項1に記載の駆動方法。
- 前記第1の補償方式で前記駆動トランジスタに対して補償を行うことは、
前記駆動トランジスタに対してリセットを行うことと、
前記駆動トランジスタに対して電圧補償を行うことと、
前記画素回路へデータ信号を入力することと、
前記発光デバイスを駆動して発光させることと、を含む、
請求項1又は2に記載の駆動方法。 - 前記駆動トランジスタの制御電極と第2電極との電圧差が前記駆動トランジスタの閾値電圧と等しくなる前に、前記画素回路へのデータ信号の入力を停止する、
請求項3に記載の駆動方法。 - 前記画素回路は、第1トランジスタと、駆動トランジスタと、第2トランジスタと、キャパシタと、発光デバイスとを含み、
その中、前記第1トランジスタの制御電極は第1スキャン信号端子に結合し、前記第1トランジスタの第1電極はデータ信号端子に結合し、前記第1トランジスタの第2電極は前記駆動トランジスタの制御電極に結合し、
前記駆動トランジスタの第1電極は第1電源に結合し、前記駆動トランジスタの第2電極は前記発光デバイスのアノードに結合し、
前記第2トランジスタの制御電極は第2スキャン信号端子に結合し、前記第2トランジスタの第1電極はセンス信号端子に結合し、前記第2トランジスタの第2電極は前記駆動トランジスタの第2電極に結合し、
前記キャパシタの第1端子は前記駆動トランジスタの制御電極に結合し、前記キャパシタの第2端子は前記駆動トランジスタの第2電極に結合し、
前記発光デバイスのカソードは第2電源に結合する、
請求項1に記載の駆動方法。 - 前記画素回路は前記データ信号端子と前記センス信号端子に結合するセンスユニットをさらに含む、
請求項5に記載の駆動方法。 - 前記第1の補償方式で前記駆動トランジスタに対して補償を行うことは、
前記第1トランジスタをオンにすることによって、前記駆動トランジスタの制御電極の電圧を前記データ信号端子からの第1電圧と等しくし、前記第2トランジスタをオンにすることによって、前記駆動トランジスタの第2電極の電圧を前記センス信号端子からの第2電圧と等しくすることと、
前記第1トランジスタを引き続きオンにし、前記第2トランジスタをオフにすることによって、前記駆動トランジスタの第2電極の電圧を、前記第2電圧から前記第1電圧と前記駆動トランジスタの閾値電圧との差分電圧にまで上昇させることと、
前記第1トランジスタを引き続きオンにし、前記データ信号端子へデータ信号を提供して前記駆動トランジスタをオンにし、前記第2トランジスタを引き続きオフにすることによって、前記駆動トランジスタの第2電極の電圧を引き続き上昇させるとともに、前記キャパシタを充電することと、
前記第1トランジスタをオフにするとともに前記第2トランジスタを引き続きオフにし、前記キャパシタの保持作用により前記駆動トランジスタを引き続きオンにすることによって、前記第1電源によって前記駆動トランジスタの第2電極の電圧を引き続き上昇させて、前記発光デバイスを駆動して発光させることと、を含み、
その中、前記第2電圧が前記第1電圧より低い、
請求項5又は6に記載の駆動方法。 - 前記第2の補償方式で前記駆動トランジスタに対して補償を行うことは、
前記第1トランジスタをオンにすることによって、前記駆動トランジスタの制御電極の電圧を前記データ信号端子からの第1電圧と等しくし、前記第2トランジスタをオンにすることによって、前記駆動トランジスタの第2電極の電圧を前記センス信号端子からの第2電圧と等しくすることと、
前記第1トランジスタを引き続きオンにし、前記第2トランジスタをオフにすることによって、前記駆動トランジスタの第2電極の電圧を、前記第2電圧から前記第1電圧と前記駆動トランジスタの閾値電圧との差分電圧にまで上昇させることと、
前記第1トランジスタを引き続きオンにし、前記データ信号端子へデータ信号を提供して前記駆動トランジスタをオンにし、前記第2トランジスタを引き続きオフにすることによって、前記駆動トランジスタの第2電極の電圧を引き続き上昇させるとともに、前記キャパシタを充電することと、
前記第1トランジスタをオフにし、前記第2トランジスタをオンにし、前記キャパシタの保持作用により前記駆動トランジスタを引き続きオンにすることによって、前記第1電源によって前記駆動トランジスタの第2電極の電圧を引き続き上昇させ、前記センス信号端子をフローティングの状態にして、前記駆動トランジスタに流れる電流を前記センスユニットへ出力し、前記センスユニットは、前記電流に基づいて外部補償電圧を算出するとともに、前記外部補償電圧で前記データ信号の電圧を補償することと、を含み、
その中、前記第2電圧が前記第1電圧より低い、
請求項6に記載の駆動方法。 - 前記駆動トランジスタはN型トランジスタである、
請求項1~8のいずれか1項に記載の駆動方法。
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CN201710310558.3 | 2017-05-05 | ||
CN201710310558.3A CN108806599B (zh) | 2017-05-05 | 2017-05-05 | 用于补偿oled像素电路的方法 |
PCT/CN2017/116383 WO2018201732A1 (zh) | 2017-05-05 | 2017-12-15 | 用于像素电路的驱动方法 |
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CN107863065A (zh) * | 2017-11-24 | 2018-03-30 | 京东方科技集团股份有限公司 | 像素单元电路、驱动方法和像素电路 |
CN109166530B (zh) | 2018-10-31 | 2020-04-14 | 合肥鑫晟光电科技有限公司 | 一种像素驱动电路的驱动方法及显示驱动电路、显示装置 |
KR102626706B1 (ko) * | 2018-12-17 | 2024-01-17 | 엘지디스플레이 주식회사 | 기준전압의 왜곡이 방지된 유기전계발광 표시장치 |
CN110047435B (zh) * | 2019-04-23 | 2020-12-04 | 京东方科技集团股份有限公司 | 像素驱动电路及其驱动方法、显示面板和显示装置 |
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