JP6120511B2 - 発光装置、発光素子の駆動回路および駆動方法 - Google Patents
発光装置、発光素子の駆動回路および駆動方法 Download PDFInfo
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- B41J2/447—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of radiation to a printing material or impression-transfer material using arrays of radiation sources
- B41J2/45—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of radiation to a printing material or impression-transfer material using arrays of radiation sources using light-emitting diode [LED] or laser arrays
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/385—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective supply of electric current or selective application of magnetism to a printing or impression-transfer material
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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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- G09G3/3233—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 current through the light-emitting element
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- G—PHYSICS
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- G09G2300/00—Aspects of the constitution of display devices
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- G—PHYSICS
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- G09G2320/0233—Improving the luminance or brightness uniformity across the screen
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
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- Microelectronics & Electronic Packaging (AREA)
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- Printers Or Recording Devices Using Electromagnetic And Radiation Means (AREA)
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Description
前記駆動回路は、駆動トランジスタと、前記駆動トランジスタのゲートに一端が接続された容量と、前記駆動トランジスタのゲートを前記駆動トランジスタのドレインに接続する第1のスイッチと、前記駆動トランジスタのドレインを前記発光素子に接続する第2のスイッチと、前記駆動トランジスタのソースを前記電源線と前記第1電圧線のいずれか一方に接続する第3のスイッチと、前記容量の他端を前記駆動トランジスタのソースと前記第2電圧線のいずれか一方に接続する第4のスイッチと、を備えており、
前記第1のスイッチをオンさせ、かつ前記第2のスイッチをオフさせて、前記第3のスイッチによって前記駆動トランジスタのソースを前記第1電圧線に接続し、前記第4のスイッチによって前記容量の他端を前記第2電圧線に接続する第1の工程と
前記第1のスイッチをオフさせ、かつ前記第2のスイッチをオンさせて、前記第3のスイッチによって前記駆動トランジスタのソースを前記電源線に接続し、前記第4のスイッチによって前記容量の他端を前記駆動トランジスタのソースに接続する第2の工程と
を有することを特徴とする。
M1 駆動トランジスタ
C1 容量
SW1−SW5 第1ないし第5のスイッチ
60 電源線
61−63 第1ないし第3電圧線
64 接地線
71−74 第1ないし第4制御線
100 駆動回路
P1、P2、P3、P4 制御信号
Claims (14)
- 発光素子と、
駆動トランジスタ、前記駆動トランジスタのゲートとドレインの間に設けられた第1のスイッチ、前記駆動トランジスタのドレインと前記発光素子の一端の間に設けられた第2のスイッチ、ならびに前記駆動トランジスタのゲートに一端が接続された容量、を含む駆動回路と、
前記駆動回路に電源電圧を供給する電源線と、
前記駆動回路に第1電圧および第2電圧をそれぞれ供給する第1電圧線および第2電圧線と、を有する発光装置であって、
前記駆動回路は、前記駆動トランジスタのソースを前記電源線と前記第1電圧線のいずれか一方に切り替え可能に接続する第3のスイッチと、前記容量の他端を前記駆動トランジスタのソースと前記第2電圧線のいずれか一方に切り替え可能に接続する第4のスイッチとを備え、
前記第1ないし第4のスイッチは、
前記第1のスイッチがオン、かつ前記第2のスイッチがオフの第1期間に、前記第3のスイッチが前記駆動トランジスタのソースを前記第1電圧線に接続し、前記第4のスイッチが前記容量の他端を前記第2電圧線に接続し、
前記第1のスイッチがオフ、かつ前記第2のスイッチがオンの第2期間に、前記第3のスイッチが前記駆動トランジスタのソースを前記電源線に接続し、前記第4のスイッチが前記容量の他端を前記駆動トランジスタのソースに接続するように、制御されることを特徴とする発光装置。 - 前記電源線に沿って1列に配置され、前記電源線を共有し、かつ前記第1ないし第4のスイッチを個別に制御可能な複数の前記駆動回路を有し、前記駆動回路の1つが前記第1期間にあるとき、残る前記駆動回路が前記第2期間にあることを特徴とする請求項1に記載の発光装置。
- 前記電源線に沿って1列に配置され、前記電源線を共有し、かつ前記第1ないし第4のスイッチをブロックごとに個別に制御可能なM×N(M、Nは2以上の整数)個の前記駆動回路を有し、1つのブロックを構成するM個の前記駆動回路が前記第1期間にあるとき、残るブロックのM×(N−1)個の前記駆動回路が前記第2期間にあることを特徴とする請求項1に記載の発光装置。
- 前記第1電圧線が一定電圧を前記駆動回路に供給し、前記第2電圧線が前記発光素子の輝度を決定する電圧を前記駆動回路に供給することを特徴とする請求項1ないし3のいずれか1項に記載の発光装置。
- 前記第2電圧線が一定電圧を前記駆動回路に供給し、前記第1電圧線が前記発光素子の輝度を決定する電圧を前記駆動回路に供給することを特徴とする請求項1ないし3のいずれか1項に記載の発光装置。
- 前記第3のスイッチと前記第4のスイッチが同一の制御信号で制御されることを特徴とする請求項1ないし5のいずれか1項に記載の発光装置。
- 前記第2のスイッチと前記第3のスイッチと前記第4のスイッチが同一の制御信号で制御されることを特徴とする請求項1ないし5のいずれか1項に記載の発光装置。
- 前記第3のスイッチが、互いのゲートが接続されたP−MOSトランジスタとN−MOSトランジスタとで構成されている請求項1ないし7のいずれか1項に記載の発光装置。
- 前記第4のスイッチが、互いのゲートが接続されたP−MOSトランジスタとN−MOSトランジスタとで構成されている請求項1ないし7のいずれか1項に記載の発光装置。
- 前記駆動回路が、前記駆動トランジスタのゲートと第3電圧線の間に設けられた第5のスイッチを備え、前記第1のスイッチと前記第2のスイッチがともにオフ、かつ前記第4のスイッチが前記容量の他端を前記第2電圧線に接続している第3期間に、前記第5のスイッチがオンになるように制御されることを特徴とする請求項1ないし9のいずれか1項に記載の発光装置。
- 電源線と第1電圧線と第2電圧線に接続された駆動回路を用いて発光素子を駆動する発光素子の駆動方法であって、
前記駆動回路は、駆動トランジスタと、前記駆動トランジスタのゲートに一端が接続された容量と、前記駆動トランジスタのゲートを前記駆動トランジスタのドレインに接続する第1のスイッチと、前記駆動トランジスタのドレインを前記発光素子に接続する第2のスイッチと、前記駆動トランジスタのソースを前記電源線と前記第1電圧線のいずれか一方に接続する第3のスイッチと、前記容量の他端を前記駆動トランジスタのソースと前記第2電圧線のいずれか一方に接続する第4のスイッチと、を備えており、
前記第1のスイッチをオンさせ、かつ前記第2のスイッチをオフさせて、前記第3のスイッチによって前記駆動トランジスタのソースを前記第1電圧線に接続し、前記第4のスイッチによって前記容量の他端を前記第2電圧線に接続する第1の工程と、
前記第1のスイッチをオフさせ、かつ前記第2のスイッチをオンさせて、前記第3のスイッチによって前記駆動トランジスタのソースを前記電源線に接続し、前記第4のスイッチによって前記容量の他端を前記駆動トランジスタのソースに接続する第2の工程と、を有することを特徴とする発光素子の駆動方法。 - 前記駆動回路が、前記駆動トランジスタのゲートと第3電圧線の間に設けられた第5のスイッチを備え、前記第1のスイッチと前記第2のスイッチをともにオフさせ、かつ前記第4のスイッチによって前記容量の他端を前記第2電圧線に接続し、前記第5のスイッチをオンさせる第3の工程を有することを特徴とする請求項11に記載の発光素子の駆動方法。
- 請求項1ないし10のいずれか1項に記載の発光装置を含む表示装置。
- 請求項1ないし10のいずれか1項に記載の発光装置を含む露光装置と感光体とを有する画像形成装置。
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
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JP2012206884A JP6120511B2 (ja) | 2012-09-20 | 2012-09-20 | 発光装置、発光素子の駆動回路および駆動方法 |
US14/030,710 US9167635B2 (en) | 2012-09-20 | 2013-09-18 | Light emitting apparatus, driving circuit of light emitting element, and driving method |
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JP2012206884A JP6120511B2 (ja) | 2012-09-20 | 2012-09-20 | 発光装置、発光素子の駆動回路および駆動方法 |
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JP2014062967A JP2014062967A (ja) | 2014-04-10 |
JP6120511B2 true JP6120511B2 (ja) | 2017-04-26 |
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JP6083407B2 (ja) * | 2014-03-20 | 2017-02-22 | コニカミノルタ株式会社 | 光書込装置および画像形成装置 |
CN103985352B (zh) * | 2014-05-08 | 2017-03-08 | 京东方科技集团股份有限公司 | 补偿像素电路及显示装置 |
JP6365020B2 (ja) * | 2014-07-01 | 2018-08-01 | コニカミノルタ株式会社 | 光書込み装置および画像形成装置 |
JP6036936B2 (ja) * | 2014-07-18 | 2016-11-30 | コニカミノルタ株式会社 | 光書込装置および画像形成装置 |
JP6478518B2 (ja) * | 2014-08-11 | 2019-03-06 | キヤノン株式会社 | 発光装置及び画像形成装置 |
JP2016088048A (ja) * | 2014-11-11 | 2016-05-23 | コニカミノルタ株式会社 | 光書込み装置および画像形成装置 |
US20160299454A1 (en) * | 2015-04-08 | 2016-10-13 | Canon Kabushiki Kaisha | Light emitter, image formation system, and exposure unit |
JP2017022071A (ja) * | 2015-07-15 | 2017-01-26 | キヤノン株式会社 | 有機発光装置 |
CN107274830B (zh) * | 2017-07-12 | 2019-07-02 | 上海天马有机发光显示技术有限公司 | 一种像素电路、其驱动方法及有机电致发光显示面板 |
WO2019016940A1 (ja) * | 2017-07-21 | 2019-01-24 | シャープ株式会社 | 表示装置およびその駆動方法 |
CN109920373B (zh) * | 2017-12-13 | 2021-05-18 | 京东方科技集团股份有限公司 | 电路驱动补偿方法、电路驱动方法及装置、显示装置 |
GB2621272A (en) * | 2021-05-28 | 2024-02-07 | Tridonic Gmbh & Co Kg | Light emitting diode converter and LED device |
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JP4472743B2 (ja) * | 2001-10-26 | 2010-06-02 | 株式会社半導体エネルギー研究所 | 半導体装置及び電子機器 |
JP2005099714A (ja) * | 2003-08-29 | 2005-04-14 | Seiko Epson Corp | 電気光学装置、電気光学装置の駆動方法および電子機器 |
JP2006076226A (ja) * | 2004-09-13 | 2006-03-23 | Seiko Epson Corp | 発光装置、その駆動方法および画像形成装置 |
US20060221005A1 (en) * | 2005-03-31 | 2006-10-05 | Kazuyoshi Omata | Display, array substrate, and method of driving display |
JP4826131B2 (ja) | 2005-04-28 | 2011-11-30 | セイコーエプソン株式会社 | 発光装置および電子機器 |
TWI521492B (zh) * | 2006-04-05 | 2016-02-11 | 半導體能源研究所股份有限公司 | 半導體裝置,顯示裝置,和電子裝置 |
JP5933160B2 (ja) * | 2008-12-04 | 2016-06-08 | 株式会社半導体エネルギー研究所 | 表示装置、電子機器及び移動体 |
JP2010266848A (ja) * | 2009-04-17 | 2010-11-25 | Toshiba Mobile Display Co Ltd | El表示装置及びその駆動方法 |
JP2012133207A (ja) * | 2010-12-22 | 2012-07-12 | Japan Display East Co Ltd | 画像表示装置およびその駆動方法 |
JP5982147B2 (ja) * | 2011-04-01 | 2016-08-31 | 株式会社半導体エネルギー研究所 | 発光装置 |
JP5474870B2 (ja) * | 2011-05-17 | 2014-04-16 | インテレクチュアル キーストーン テクノロジー エルエルシー | 電気光学装置及び電子機器 |
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