JP2012103660A - 画素、および有機電界発光表示装置 - Google Patents
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Abstract
【解決手段】カソード電極が第2電源と接続される有機発光ダイオードと、第1電極がデータ線と接続され、第2電極が第1ノードに接続され、走査線に走査信号が供給されるときにターンオンされる第1トランジスタと、第1ノードと第3電源との間に接続され、データ線から供給されるデータ信号に対応する電圧を充電する第1キャパシタと、第1キャパシタの電圧を用いて充電され、充電された電圧に対応する電流を第1電源から有機発光ダイオードを経由して第2電源に供給するための画素回路とを備える画素が提供される。
【選択図】図4
Description
120 制御駆動部
130 データ駆動部
140 画素部
150 タイミング制御部
Claims (23)
- カソード電極が第2電源と接続される有機発光ダイオードと、
第1電極がデータ線と接続され、第2電極が第1ノードに接続され、走査線に走査信号が供給されるときにターンオンされる第1トランジスタと、
前記第1ノードと第3電源との間に接続され、前記データ線から供給されるデータ信号に対応する電圧を充電する第1キャパシタと、
前記第1キャパシタの電圧を用いて充電され、充電された電圧に対応する電流を第1電源から前記有機発光ダイオードを経由して前記第2電源に供給するための画素回路と、
を備えることを特徴とする画素。 - 前記第3電源は、前記第1電源と同一の電圧に設定されることを特徴とする、請求項1に記載の画素。
- 前記第3電源は、前記第1電源と別途のラインを介して前記第1キャパシタと接続されることを特徴とする、請求項1に記載の画素。
- 前記第3電源は、直流電圧を供給することを特徴とする、請求項1に記載の画素。
- 前記第3電源は、前記画素回路に供給される電圧のうちいずれか1つの電圧に設定されることを特徴とする、請求項1に記載の画素。
- 前記第3電源は、前記第1電源であることを特徴とする、請求項5に記載の画素。
- 前記画素回路は、
前記第1電源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る第2トランジスタと、
前記第2トランジスタのゲート電極と前記第1ノードとの間に接続され、フレーム期間に前記第1トランジスタよりも先にターンオンされる第3トランジスタと、
前記第2トランジスタのゲート電極と前記第1電源との間に接続される第2キャパシタと、
前記第2トランジスタのゲート電極と初期電源との間に接続され、前記フレーム期間に前記第3トランジスタよりも先にターンオンされる第4トランジスタと、
を備えることを特徴とする、請求項1〜6のいずれか1項に記載の画素。 - 前記第3電源は、前記初期電源であることを特徴とする、請求項7に記載の画素。
- 前記画素回路は、
前記第1電源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る第2トランジスタと、
前記第1電源と接続される前記第2トランジスタの第1電極と前記第1ノードとの間に接続され、フレーム期間に前記第1トランジスタよりも先にターンオンされる第3トランジスタと、
前記第2トランジスタのゲート電極と前記第1電源との間に接続される第2キャパシタと、
前記第2トランジスタのゲート電極と初期電源との間に接続され、前記第3トランジスタよりも先にターンオンされる第4トランジスタと、
前記第2トランジスタの第2電極とゲート電極との間に接続され、前記第3トランジスタと同時にターンオンおよびターン-オフされる第5トランジスタと、
を備えることを特徴とする、請求項1〜6のいずれか1項に記載の画素。 - 前記画素回路は、
前記第2トランジスタの第1電極と前記第1電源との間に接続され、前記フレーム期間に前記第3トランジスタおよび第4トランジスタがターンオンされるときにターンオフされ、その他の期間にターンオンされる第6トランジスタと、
前記第2トランジスタの第2電極と前記有機発光ダイオードとの間に接続され、前記第6トランジスタと同時にターンオンおよびターン-オフされる第7トランジスタと、
をさらに備えることを特徴とする、請求項9に記載の画素。 - 走査線およびデータ線の交差部に位置する画素と、
前記走査線に走査信号を順次供給するための走査駆動部と、
前記データ線に前記走査信号と同期されるようにデータ信号を供給するためのデータ駆動部と、
前記画素と共通して接続される第1制御線および第2制御線と、
それぞれのフレーム期間中、前記走査線に走査信号が供給される以前の初期期間に、前記第1制御線に第1制御信号、前記第2制御線に第2制御信号をそれぞれ順次供給するための制御駆動部と、
を備え、
j番目(jは、1以上の整数)の水平ラインに位置する画素は、
j番目の走査線に走査信号が供給されるときに前記データ信号に対応する電圧を充電する第1キャパシタと、
前記第2制御線に第2制御信号が供給されるときに前記第1キャパシタに充電された電圧に対応する電圧を充電する第2キャパシタと、
を備えることを特徴とする、有機電界発光表示装置。 - 前記データ駆動部は、前記データ線に左側データ信号および右側データ信号をフレーム期間ごとに交互に供給することを特徴とする、請求項11に記載の有機電界発光表示装置。
- 前記第1キャパシタは、前記第2キャパシタよりも高い容量で形成されることを特徴とする、請求項11に記載の有機電界発光表示装置。
- 前記j番目の水平ラインに位置する画素は、
カソード電極が第2電源に接続される有機発光ダイオードと、
データ線と第1ノードとの間に接続され、前記j番目の走査線に走査信号が供給されるときにターンオンされる第1トランジスタと、
前記第1ノードと第3電源との間に接続される前記第1キャパシタと、
前記第2制御線に第2制御信号が供給されるときに前記第1キャパシタに充電された電圧に対応する電圧を充電する前記第2キャパシタと、
を含み、
第1電源から前記有機発光ダイオードを経由して前記第2電源に電流を供給するための画素回路を備えることを特徴とする、請求項11または12に記載の有機電界発光表示装置。 - 前記第3電源は、前記第1電源と同一の電圧に設定されることを特徴とする、請求項14に記載の有機電界発光表示装置。
- 前記第3電源は、前記第1電源と別途のラインを介して前記第1キャパシタと接続されることを特徴とする、請求項14に記載の有機電界発光表示装置。
- 前記第3電源は、直流電圧を供給することを特徴とする、請求項14に記載の有機電界発光表示装置。
- 前記第3電源は、前記画素回路に供給される電圧のうちいずれか1つの電圧に設定されることを特徴とする、請求項14に記載の有機電界発光表示装置。
- 前記第3電源は、前記第1電源であることを特徴とする、請求項18に記載の有機電界発光表示装置。
- 前記画素回路は、
前記第1電源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る第2トランジスタと、
前記第2トランジスタのゲート電極と前記第1ノードとの間に接続され、前記第2制御信号が供給されるときにターンオンされる第3トランジスタと、
前記第2トランジスタのゲート電極と前記第1電源との間に接続される前記第2キャパシタと、
前記第2トランジスタのゲート電極と初期電源との間に接続され、前記第1制御信号が供給されるときにターンオンされる第4トランジスタと、
を備えることを特徴とする、請求項14に記載の有機電界発光表示装置。 - 前記画素回路は、
前記第1電源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る第2トランジスタと、
前記第1電源に接続される前記第2トランジスタの第1電極と前記第1ノードとの間に接続され、前記第2制御信号が供給されるときにターンオンされる第3トランジスタと、
前記第2トランジスタのゲート電極と前記第1電源との間に接続される前記第2キャパシタと、
前記第2トランジスタのゲート電極と初期電源との間に接続され、前記第1制御信号が供給されるときにターンオンされる第4トランジスタと、
前記第2トランジスタの第2電極とゲート電極との間に接続され、前記第2制御信号が供給されるときにターンオンされる第5トランジスタと、
を備えることを特徴とする、請求項14に記載の有機電界発光表示装置。 - 前記画素と共通して接続される発光制御線をさらに備え、
前記発光制御線は、前記第2トランジスタの第1電極と前記第1電源との間に接続される第6トランジスタのゲート電極と、前記第2トランジスタの第2電極と前記有機発光ダイオードとの間に接続される第7トランジスタのゲート電極とに接続されることを特徴とする、請求項21に記載の有機電界発光表示装置。 - 前記第6トランジスタおよび第7トランジスタは、前記発光制御線に発光制御信号が供給されるときにターンオフされ、その他の場合にターンオンされることを特徴とする、請求項22に記載の有機電界発光表示装置。
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Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |