JP2018084811A - 有機発光表示装置及びその駆動方法 - Google Patents
有機発光表示装置及びその駆動方法 Download PDFInfo
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Abstract
【解決手段】 劣化補償部は、複数の画素各々に対応する入力データのカウンティングを通じて生成される各画素のストレスデータに基づいて、表示領域のうち少なくとも一つの劣化領域を検出して、各劣化領域に対応する水平ラインらの中で、任意に選ばれたいずれか2つ以上の水平ラインに含まれる複数の画素の劣化状態に対するセンシングデータ及び各画素のストレスデータに基づいて、各劣化領域に含まれた複数の画素の補償データを生成する。
【選択図】 図3
Description
Claims (14)
- 複数の画素からなる表示領域を含む表示パネルと、
前記複数の画素にスキャン信号及びセンシング信号を供給するゲート駆動部と、
前記複数の画素にデータ信号を供給して、前記複数の画素の劣化状態をセンシングするデータ駆動部と、
前記ゲート駆動部及び前記データ駆動部をドライビングモードまたはセンシングモードのうちいずれかで駆動するタイミングコントローラと、
前記各画素に対応する入力データのカウンティングを通じて生成される各画素のストレスデータに基づいて、前記表示領域のうち少なくとも一つの劣化領域を検出して、前記各劣化領域に対応する水平ラインの中で、任意に選ばれたいずれか2つ以上の水平ラインに含まれる複数の画素の劣化状態に対するセンシングデータ及び前記各画素のストレスデータに基づいて、前記各劣化領域に含まれた複数の画素の補償データを生成する劣化補償部と、
を含む有機発光表示装置。 - 前記劣化補償部は、
前記各画素に対応する入力データをカウンティングして、各画素の累積データを生成するデータカウンティング部と、
前記各画素の累積データに従い各画素の劣化状態を予測して、各画素のストレスデータを生成する劣化予測部と、
前記各画素のストレスデータに基づいて、前記表示領域のうち少なくとも一つの前記劣化領域を検出する劣化領域検出部と、
前記各劣化領域で任意に選ばれたいずれか2つ以上の水平ラインに含まれる複数の画素の劣化状態に対する前記センシングデータを受信するセンシング制御部と、
前記センシングデータ及び前記各画素のストレスデータに基づいて、前記各劣化領域に含まれた複数の画素の補償データを生成する第1の補償データ生成部と、
を含む、請求項1に記載の有機発光表示装置。 - 前記劣化領域検出部は、
前記各画素のストレスデータに基づいて、第1方向に並列された画素各々からなる複数の水平ラインそれぞれの最大ストレスデータを検出して、前記複数の水平ラインの最大ストレスデータに基づいて、劣化臨界データを算出して、前記複数の水平ラインの中で、前記劣化臨界データ以上の最大ストレスデータを有する劣化水平ラインを検出して、前記表示領域のうち前記劣化水平ラインを含む少なくとも一つの劣化領域を選択する、請求項2に記載の有機発光表示装置。 - 前記第1の補償データ生成部は、
前記センシングデータと前記センシングデータに対応する画素のオリジナルストレスデータとの間の差が臨界以上であると、前記センシングデータ及び所定のセンシングデータの加重値に基づいて、前記オリジナルストレスデータを校正する、請求項2に記載の有機発光表示装置。 - 前記第1の補償データ生成部は、
前記オリジナルストレスデータと前記校正済みストレスデータに基づいて校正比率を算出し、
前記校正比率に基づいて、前記劣化領域に含まれた複数の画素のストレスデータを校正し、
前記各劣化領域に含まれた複数の画素の前記校正済みストレスデータに基づいて、前記各劣化領域に含まれた複数の画素の補償データを生成する、請求項4に記載の有機発光表示装置。 - 前記センシングデータの加重値は、累積駆動時間に基づいて算出される、請求項4に記載の有機発光表示装置。
- 前記劣化補償部は、前記各画素のストレスデータに基づいて、前記表示領域のうち劣化領域を除く残り領域に含まれた複数の画素の補償データを生成する第2の補償データ生成部をさらに含む、請求項2に記載の有機発光表示装置。
- 前記データ駆動部は、前記劣化補償部による補償データに従い補償されたデータ信号を前記複数の画素に供給する、請求項1に記載の有機発光表示装置。
- 表示領域に配置された複数の画素を含む有機発光表示装置を駆動する方法において、
前記複数の画素各々に対応する入力データをカウンティングして、各画素の累積データを生成するステップと、
前記各画素の累積データに従い各画素の劣化状態を予測して、各画素のストレスデータを生成するステップと、
前記各画素のストレスデータに基づいて、前記表示領域のうち少なくとも一つの劣化領域を検出するステップと、
前記各劣化領域で任意に選ばれた2つ以上の水平ラインに含まれる複数の画素の劣化状態に対するセンシングデータを受信するステップと、
前記センシングデータ及び前記各画素のストレスデータに基づいて、前記各劣化領域に含まれた複数の画素の補償データを生成するステップと、
を含む有機発光表示装置の駆動方法。 - 前記少なくとも一つの劣化領域を検出するステップは、
前記各画素のストレスデータに基づいて、第1方向に並列された複数の画素各々からなる複数の水平ラインそれぞれの最大ストレスデータを検出するステップと、
前記複数の水平ラインの最大ストレスデータに基づいて、劣化臨界データを算出するステップと、
前記複数の水平ラインの中で、前記劣化臨界データ以上の最大ストレスデータを有する劣化水平ラインを検出して、前記表示領域のうち、前記劣化水平ラインを含む少なくとも一つの劣化領域を選択するステップと、
を含む請求項9に記載の有機発光表示装置の駆動方法。 - 前記各劣化領域に含まれた複数の画素の補償データを生成するステップは、
前記センシングデータと前記センシングデータに対応する画素のオリジナルストレスデータとの間の差が臨界差以上であると、前記センシングデータ及び所定のセンシングデータの加重値に基づいて、前記オリジナルストレスデータを校正するステップと、
前記オリジナルストレスデータと前記校正済みストレスデータに基づいて校正比率を算出するステップと、
前記校正比率に基づいて、前記各劣化領域に含まれた複数の画素のストレスデータを校正するステップと、
前記各劣化領域に含まれた複数の画素の前記校正済みストレスデータに基づいて、前記各劣化領域に含まれた複数の画素の補償データを生成するステップと、
を含む請求項9に記載の有機発光表示装置の駆動方法。 - 前記センシングデータの加重値は、累積駆動時間が所定の臨界時間以上であると、前記累積駆動時間に比例して算出される、請求項11に記載の有機発光表示装置の駆動方法。
- 前記各劣化領域に含まれた複数の画素の補償データを生成するステップは、前記センシングデータと前記センシングデータに対応する前記画素のオリジナルストレスデータとの間の差が臨界差未満であると、前記各画素のオリジナルストレスデータに基づいて、前記各劣化領域に含まれた複数の画素の補償データを生成するステップを含む、請求項11に記載の有機発光表示装置の駆動方法。
- 前記各画素のストレスデータに基づいて、前記表示領域のうち、劣化領域を除く残り領域に含まれた複数の画素の補償データを生成するステップをさらに含む、請求項9に記載の有機発光表示装置の駆動方法。
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