JP6879928B2 - 補償画素回路、表示パネル、表示装置、補償及び駆動方法 - Google Patents
補償画素回路、表示パネル、表示装置、補償及び駆動方法 Download PDFInfo
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Description
前記リセット期間では、制御信号をオン電圧とし、第1の走査信号をオフ電圧とし、第2の走査信号をオフ電圧とし、
前記補償期間では、制御信号をオフ電圧とし、第1の走査信号をオン電圧とし、第2の走査信号をオフ電圧とし、
前記発光期間では、制御信号をオフ電圧とし、第1の走査信号をオフ電圧とし、第2の走査信号をオン電圧とする。
各サブ画素の最も基本的な画素回路は2T1C(即ち、2つのトランジスタ(走査トランジスタと駆動トランジスタ)及び1つの記憶容量を有する)モードである。例えば、図6に示す2T1C画素回路である。パネル全体の表示の均一性を改善するために、各サブ画素の画素回路に、上記の2T1Cモードに基づいて補償機能を有する画素回路を具備させてもよい。このような画素回路は補償画素回路と呼ばれてもよい。補償原理に基づいて、補償画素回路は、電圧補償、電流補償及び混合補償との3種を含むことができる。。然し、基本的な2T1C画素回路に比べて、補償画素回路を用いるOLED表示パネルは、輝度の均一性がより優れるが、各サブ画素の駆動回路部分に占められるパネル領域が大きくなり、高い解像度のOLED表示パネルの取得に不利になる。
図2(a)に示すように、本発明の実施例に係る補償画素回路100では、信号収集回路120が駆動トランジスタDTのゲート電極に電気的に接続されることにより、駆動トランジスタDTのゲート電圧を収集することができる。
IOLED=K(VGS−Vth)2
=K(Vdata+Vth−Vdd−Vth)2
=K(Vdata−Vdd)2
ここで、
なお、図7に示す非補償画素回路は1つの例示に過ぎず、本発明の実施例は、それを含むが、それに限らない。
ステップS10:補償画素回路における信号収集回路が収集した駆動トランジスタのゲート電圧を受信し、
ステップS20:駆動トランジスタのゲート電圧に応じて非補償画素回路を補償する。
ステップS21:補償駆動回路が受信した発光データ信号を受信し、
ステップS22:補償駆動トランジスタの閾値電圧を取得するように、駆動トランジスタのゲート電圧から、補償駆動回路が受信した発光データ信号の発光電圧を減じ、
ステップS23:非補償画素回路の発光データ信号を受信し、
ステップS24:非補償画素回路の更新した発光データ信号の発光電圧を取得するように、非補償画素回路の発光データ信号の発光電圧に閾値電圧を加え、
ステップS25:非補償画素回路に更新した発光データ信号の発光電圧を送信する。
11 補償領域
13 走査駆動器
14 データ駆動器
15 タイミング制御器
100 画素回路
110 補償駆動回路
120 信号収集回路
130 補償制御器
200 非補償画素回路
Claims (17)
- 駆動トランジスタ及び有機発光ダイオードを有し、発光データ信号を受信し、前記駆動トランジスタの閾値電圧を補償し、前記発光データ信号に応じて前記有機発光ダイオードの発光を駆動するように配置される補償駆動回路と、
前記補償駆動回路に接続され、前記駆動トランジスタのゲート電圧を収集するように配置される信号収集回路と、
前記信号収集回路により収集された前記駆動トランジスタのゲート電圧を受信するように配置される補償制御器と、を備え、
前記補償制御器は、さらに、前記補償駆動回路が受信した発光データ信号を受信し、前記駆動トランジスタの閾値電圧を取得するように、前記駆動トランジスタのゲート電圧から、前記補償駆動回路が受信した発光データ信号の発光電圧を減じるように配置される補償画素回路。 - 前記信号収集回路は前記駆動トランジスタのゲート電極に電気的に接続される請求項1に記載の補償画素回路。
- 前記補償駆動回路は、さらに、第1のトランジスタ、第2のトランジスタ、第3のトランジスタ、第4のトランジスタ、第5のトランジスタ及び記憶容量を備える請求項1に記載の補償画素回路。
- 第1の電圧を受信するように、前記第1のトランジスタの第1極が第1の電源線に電気的に接続され、第2の走査信号を受信するように、前記第1のトランジスタのゲート電極、及び前記第5のトランジスタのゲート電極が第2の走査信号線に電気的に接続され、前記第1のトランジスタの第2極が第1のノードに電気的に接続され、
発光データ信号を受信するように、前記第2のトランジスタの第1極が発光データ信号線に電気的に接続され、第1の走査信号を受信するように、前記第2のトランジスタのゲート電極、及び前記第4のトランジスタのゲート電極が第1の走査信号線に電気的に接続され、前記第2のトランジスタの第2極が前記第1のノードに電気的に接続され、
第2の電圧を受信するように、前記第3のトランジスタの第1極が第2の電源線に電気的に接続され、制御信号を受信するように、前記第3のトランジスタのゲート電極が制御信号線に電気的に接続され、前記第3のトランジスタの第2極が第2のノードに電気的に接続され、
前記第4のトランジスタの第1極が前記第2のノードに電気的に接続され、前記第4のトランジスタの第2極が第3のノードに電気的に接続され、
前記第5のトランジスタの第1極が前記第3のノードに電気的に接続され、前記第5のトランジスタの第2極が前記有機発光ダイオードの第1極に電気的に接続され、
前記有機発光ダイオードの第2極が接地され、
前記駆動トランジスタの第1極が前記第1のノードに電気的に接続され、前記駆動トランジスタのゲート電極が前記第2のノードに電気的に接続され、前記駆動トランジスタの第2極が前記第3のノードに電気的に接続され、
前記記憶容量の第1端が前記第2の電源線に電気的に接続され、前記記憶容量の第2端が前記第2のノードに電気的に接続される請求項3に記載の補償画素回路。 - 前記第2の電源線が接地される請求項4に記載の補償画素回路。
- 前記第1のトランジスタ、前記第2のトランジスタ、前記第3のトランジスタ、前記第4のトランジスタ及び前記第5のトランジスタは何れもP型トランジスタである請求項3〜5の何れか1項に記載の補償画素回路。
- 前記第1のトランジスタ、前記第2のトランジスタ、前記第3のトランジスタ、前記第4のトランジスタ及び前記第5のトランジスタは何れも薄膜トランジスタである請求項3〜5の何れか1項に記載の補償画素回路。
- 請求項1〜7の何れか1項に記載の補償画素回路を備えることを特徴とする表示パネル。
- 複数の補償領域を備え、各前記補償領域は少なくとも1つの前記補償画素回路を有することを特徴とする請求項8に記載の表示パネル。
- 各前記補償領域は、さらに、非補償画素回路を有し、前記非補償画素回路が占めるサブ画素領域は前記補償画素回路が占めるサブ画素領域に隣り合う請求項9に記載の表示パネル。
- 前記補償制御器は、前記駆動トランジスタのゲート電圧に応じて前記非補償画素回路を補償するように配置される請求項10に記載の表示パネル。
- 前記補償制御器は、さらに、
前記非補償画素回路の発光データ信号を受信し、
前記非補償画素回路の更新した発光データ信号の発光電圧を取得するように、前記非補償画素回路の発光データ信号の発光電圧に前記閾値電圧を加え、
前記非補償画素回路に前記更新した発光データ信号の発光電圧を送信するように配置される請求項11に記載の表示パネル。 - 各前記補償領域は、1つの補償画素回路及び8つの非補償画素回路を備え、前記非補償画素回路は前記補償画素回路を囲むように設置される請求項10に記載の表示パネル。
- 請求項8〜13の何れか1項に記載の表示パネルを備えることを特徴とする表示装置。
- 補償画素回路における信号収集回路が収集した駆動トランジスタのゲート電圧を受信することと、
前記駆動トランジスタのゲート電圧に応じて非補償画素回路を補償することと、を備え、
前記駆動トランジスタのゲート電圧に応じて前記非補償画素回路を補償することは、
補償駆動回路が受信した発光データ信号を受信することと、
前記駆動トランジスタの閾値電圧を取得するように、前記駆動トランジスタのゲート電圧から前記補償駆動回路が受信した発光データ信号の発光電圧を減じることと、
前記非補償画素回路の発光データ信号を受信することと、
前記非補償画素回路の更新した発光データ信号の発光電圧を取得するように、前記非補償画素回路の発光データ信号の発光電圧に前記閾値電圧を加えることと、
前記非補償画素回路に前記更新した発光データ信号の発光電圧を送信することとを備える領域補償方法。 - 請求項1〜7の何れか1項に記載の補償画素回路を駆動する方法であって、
リセット期間、補償期間及び発光期間を備え、
前記リセット期間では、制御信号をオン電圧とし、第1の走査信号をオフ電圧とし、第2の走査信号をオフ電圧とし、
前記補償期間では、制御信号をオフ電圧とし、第1の走査信号をオン電圧とし、第2の走査信号をオフ電圧とし、
前記発光期間では、制御信号をオフ電圧とし、第1の走査信号をオフ電圧とし、第2の走査信号をオン電圧とする方法。 - 前記リセット期間の前に、準備期間をさらに備え、
前記準備期間では、制御信号をオフ電圧とし、第1の走査信号をオフ電圧とし、第2の走査信号をオフ電圧とする請求項16に記載の方法。
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