JP7343397B2 - 画素回路及びその駆動方法、表示基板、表示装置 - Google Patents
画素回路及びその駆動方法、表示基板、表示装置 Download PDFInfo
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Description
12 分圧サブ回路
Claims (20)
- ゲート信号端子、データ信号端子、スイッチ信号端子、および分圧制御信号端子を含む画素回路であって、
前記ゲート信号端子、前記データ信号端子および前記スイッチ信号端子にそれぞれ接続され、前記ゲート信号端子がゲート駆動信号を受信したときに前記データ信号端子における電圧に応じて駆動電圧を保存し、前記スイッチ信号端子が発光制御信号を受信したときに保存された駆動電圧に応じて発光素子に電流値と前記駆動電圧の電圧値が正の相関がある駆動電流を出力するように構成される電流源サブ回路(11)と、
前記分圧制御信号端子および前記電流源サブ回路(11)にそれぞれ接続され、前記分圧制御信号端子が受信した分圧制御信号に基づいて、前記駆動電流が前記発光素子に出力される出力経路におけるその自身の等価抵抗値を、前記等価抵抗値が前記電流源サブ回路(11)に保存された前記駆動電圧に対して負の相関となるように調整するように構成される分圧サブ回路(12)と、
をさらに含む画素回路。 - 前記電流源サブ回路(11)に電気エネルギーを供給するように構成される発光電源端子および前記発光素子に駆動電流を出力するように構成される電流出力端子をさらに含み、
前記電流源サブ回路(11)と前記分圧サブ回路(12)は、前記発光電源端子と前記電流出力端子との間に直列に接続される。
請求項1に記載の画素回路。 - 前記発光電源端子は、前記電流源サブ回路(11)に接続され、前記電流出力端子は、前記分圧サブ回路(12)に接続される請求項2に記載の画素回路。
- 前記分圧サブ回路(12)は、第1のトランジスタを含み、
前記第1のトランジスタのゲートは、前記分圧制御信号端子に接続され、前記第1のトランジスタのソースとドレインは、それぞれ、前記電流源サブ回路(11)と前記電流出力端子のうちの1つに接続される請求項3に記載の画素回路。 - 前記発光電源端子は、前記分圧サブ回路(12)に接続され、前記電流出力端子は、前記電流源サブ回路(11)に接続される請求項2に記載の画素回路。
- 前記分圧サブ回路(12)は、第1のトランジスタを含み、
前記第1のトランジスタのゲートは、前記分圧制御信号端子に接続され、前記第1のトランジスタのソースとドレインは、それぞれ、前記電流源サブ回路(11)と前記発光電源端子のうちの1つに接続される請求項5に記載の画素回路。 - 前記電流源サブ回路(11)は、データ書き込み二次回路(111)、保存二次回路(112)、駆動二次回路(113)、およびスイッチ制御二次回路(114)を含み、
前記データ書き込み二次回路(111)は、前記保存二次回路(112)、前記駆動二次回路(113)、前記ゲート信号端子、および前記データ信号端子にそれぞれ接続され、前記ゲート信号端子がゲート駆動信号を受信したときに前記データ信号端子における電圧に応じて前記保存二次回路(112)に駆動電圧を書き込むように構成され、
前記保存二次回路(112)は、前記駆動二次回路(113)にも接続され、前記駆動電圧を保存し、前記駆動電圧を前記駆動二次回路(113)に提供するように構成され、
前記駆動二次回路(113)は、前記保存二次回路(112)が提供した駆動電圧に応じて、前記発光素子に電流値と前記駆動電圧の電圧値が正の相関がある駆動電流を出力するように構成され、
前記スイッチ制御二次回路(114)は、前記駆動二次回路(113)と前記スイッチ
信号端子にそれぞれ接続され、前記スイッチ信号端子が発光制御信号を受信したときに前記駆動電流の出力経路をオンにするように構成される、
請求項1から6のいずれか1項に記載の画素回路。 - 前記ゲート信号端子は、第1の端子と第2の端子を含み、前記データ書き込み二次回路(111)は、第1のn型トランジスタと第1のp型トランジスタを含み、
前記第1のn型トランジスタのゲートは、前記第1の端子に接続され、前記第1のn型トランジスタのソースとドレインは、それぞれ、前記データ信号端子と前記保存二次回路(112)のうちの1つに接続され、
前記第1のp型トランジスタのゲートは、前記第2の端子に接続され、前記第1のp型トランジスタのソースとドレインは、それぞれ、前記データ信号端子と前記保存二次回路(112)のうちの1つに接続される、
請求項7に記載の画素回路。 - 前記駆動二次回路(113)は、駆動トランジスタを含み、前記駆動トランジスタのゲートは、前記データ書き込み二次回路(111)と前記保存二次回路(112)に接続され、前記駆動トランジスタのソースとドレインは、それぞれ、前記スイッチ制御二次回路(114)と前記画素回路の電流出力端子のうちの1つに接続される、
請求項7または8に記載の画素回路。 - 前記保存二次回路(112)は、第1の端部が前記データ書き込み二次回路(111)と前記駆動二次回路(113)に接続されかつ第2の端部が共通電圧線に接続される第1のコンデンサを含む、
請求項7から9のいずれか1項に記載の画素回路。 - 前記スイッチ制御二次回路(114)は、第2のトランジスタを含み、前記第2のトランジスタのゲートは、前記スイッチ信号端子に接続され、前記第2のトランジスタのソースとドレインは、それぞれ、前記画素回路の発光電源端子と前記駆動二次回路(113)のうちの1つに接続される、
請求項7から10のいずれか1項に記載の画素回路。 - 初期化サブ回路(13)をさらに含み、前記初期化サブ回路(13)は、前記画素回路の電流出力端子に接続され、前記電流源サブ回路(11)が毎回前記データ信号端子における電圧に応じて前記駆動電圧を保存する前に、前記電流出力端子における電圧を初期化電圧とするように構成される、
請求項1から11のいずれか1項に記載の画素回路。 - 初期化信号端子をさらに含み、前記初期化サブ回路(13)は、第3のトランジスタを含み、
前記第3のトランジスタのゲートは、前記初期化信号端子に接続され、前記第3のトランジスタのソースとドレインは、それぞれ、前記電流出力端子と共通電圧線のうちの1つに接続される、
請求項12に記載の画素回路。 - 前記発光素子をさらに含み、前記発光素子は、有機発光ダイオードであり、
前記有機発光ダイオードは、前記電流源サブ回路(11)が出力した駆動電流を受信することにより発光するように構成される、
請求項1から13のいずれか1項に記載の画素回路。 - 請求項1から14のいずれか1項に記載の画素回路の駆動方法であって、
スイッチ信号端子に発光制御信号を提供し、分圧制御信号端子に分圧制御信号を提供することにより、前記画素回路における分圧サブ回路(12)の等価抵抗値と前記画素回路における電流源サブ回路(11)に保存された駆動電圧が負の相関がある発光段階を含む、
駆動方法。 - 前記発光段階の前に、ゲート信号端子にゲート駆動信号を提供し、前記発光制御信号および前記分圧制御信号の提供を停止することにより、前記画素回路の電流源サブ回路(11)がデータ信号端子における電圧に応じて駆動電圧を保存するデータ書き込み段階をさらに含む、
請求項15に記載の駆動方法。 - 請求項1から14のいずれか一項に記載の画素回路(100)を幾つか含む表示基板。
- 幾つかの制御線を介して各前記画素回路(100)に接続された分圧制御回路(200)をさらに含み、
各前記制御線は、1つの前記画素回路(100)の分圧制御端子を前記分圧制御回路(200)に接続し、
または、複数の表示ユニットを含み、各前記表示ユニットは、複数の前記画素回路(100)を含み、各前記制御線は、1つの表示ユニット内のすべての画素回路(100)の分圧制御端子を前記分圧制御回路(200)に接続する、
請求項17に記載の表示基板。 - ゲート駆動回路(300)およびデータ駆動回路(400)をさらに含み、幾つかの前記画素回路(100)は、複数の行および列に並び、
前記ゲート駆動回路(300)は、複数のゲート線を介して各前記画素回路(100)に接続され、各前記ゲート線は、1行分の前記画素回路(100)のゲート信号端子を前記ゲート駆動回路(300)に接続し、
前記データ駆動回路(400)は、複数のデータ線を介して各前記画素回路(100)に接続され、各前記データ線は、1列分の前記画素回路(100)のデータ信号端子を前記データ駆動回路(400)に接続する、
請求項17または18に記載の表示基板。 - 請求項17から19のいずれか一項に記載の表示基板を含む表示装置。
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