JP6557369B2 - ディスプレイ駆動装置 - Google Patents
ディスプレイ駆動装置 Download PDFInfo
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- 239000003990 capacitor Substances 0.000 claims description 9
- 230000005669 field effect Effects 0.000 description 22
- 238000010586 diagram Methods 0.000 description 4
- 239000004065 semiconductor Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—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
- G09G3/22—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
- 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]
- G09G3/3225—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
- 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
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—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
- G09G3/22—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
- 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]
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
- G05F3/00—Non-retroactive systems for regulating electric variables by using an uncontrolled element, or an uncontrolled combination of elements, such element or such combination having self-regulating properties
- G05F3/02—Regulating voltage or current
- G05F3/08—Regulating voltage or current wherein the variable is dc
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2310/00—Command of the display device
- G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
- G09G2310/0264—Details of driving circuits
- G09G2310/0289—Details of voltage level shifters arranged for use in a driving circuit
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
- G09G2330/02—Details of power systems and of start or stop of display operation
- G09G2330/021—Power management, e.g. power saving
- G09G2330/023—Power management, e.g. power saving using energy recovery or conservation
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
- G09G2330/02—Details of power systems and of start or stop of display operation
- G09G2330/028—Generation of voltages supplied to electrode drivers in a matrix display other than LCD
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Control Of El Displays (AREA)
- Continuous-Control Power Sources That Use Transistors (AREA)
Description
+(高電圧HV−低電圧LV)×電流IHV ・・・(1)
この消費電力Aと比較するために、かかる実施例1に備えられたような再利用回路24を用いないで、上記した特許文献1に示されたようにレギュレータで降下生成された低電圧を使用する駆動装置の例を図4に示す。この図4に示した駆動装置では、電源部13の出力電圧である中電圧MVを低電圧LVに変換するレギュレータ51が備えられ、レギュレータ51の出力電圧である低電圧LVがLV回路22に印加される一方、電源部14の出力電圧である高電圧HVはそのままHV回路23に印加され、その動作電流IHVはHV回路23からグランドライン36を介して流れ出るようになっている。グランドライン36は接地された外部接続端子20に接続されている。
電流IMVを40[mA]とし、電流IHVを35[mA]とすると、上述したようにHV=7[V]、MV=1.8[V]、LV=1.2[V]であるので、消費電力Bは式(2)から、
消費電力B=1.8[V]×40[mA]+7[V]×35[mA]=317[mW]
となる。
消費電力A=1.8[V]×(40[mA]−35[mA])
+(7[V]−1.2[V])×35[mA]=212[mW]
となる。図1に示した実施例1の駆動装置では、消費電力Aは消費電力Bより33%ほど低下していることが分かる。すなわち、HV回路23からの電流IHVをLV回路22で再利用する場合には消費電力を削減することができる。また、駆動電圧VOUTの電圧範囲は低電圧LVより高いので、HV回路23からの電流IHVをLV回路22で再利用しても駆動電圧VOUTを図2に示したような所望の電圧範囲VOUTL〜VOUTHで変動させることができる。
+(高電圧HV−低電圧LV)×電流IHVB ・・・(3)
HV回路61を流れる電流IHVAが5[mA]、HV回路61、62を流れる電流IHV2及びIHV3の合成電流IHVBが30[mA]であるとし、その他の電圧値及び電流値は上記した消費電力Aの計算の際の値と等しいとすると、式(3)から消費電力Cを計算すると、
消費電力C=1.8[V]×(40[mA]−30[mA])+7[V]×5[mA]
+(7[V]−1.2[V])×30[mA]=227[mW]
となる。図5に示した実施例2の駆動装置では、消費電力Cは、図4の駆動装置例の消費電力Bより28%ほど低下していることが分かる。このように、HV回路61には高電圧HVを0[V]のレベルからの電圧レベル範囲が得られるようにその動作電流IHVAをグランドライン36に流し、0[V]のレベルを必要としないHV回路62、63を流れる電流IHVBをLV回路22で再利用するので、駆動装置の消費電力を削減することができる。
12 ドライバ部
13、14 電源部
16〜20 外部接続端子
21 MV回路
22 LV回路
23、61、62 HV回路
24 再利用回路
41 基準電圧生成回路
42 オペアンプ
43、44 電界効果トランジスタ
45、46 スタートアップ回路
47 クランプ回路
48、64 パスコン
63 HV出力回路
70 IC
71〜77 パッド
Claims (7)
- ディスプレイパネルを駆動する駆動装置であって、
高電源電圧の印加に応じて動作電流を得て、前記ディスプレイパネルに駆動電圧を供給する高電圧動作部と、
前記高電源電圧より低い低電源電圧の印加に応じて動作し、前記高電圧動作部を制御する低電圧動作部と、
前記高電圧動作部から前記動作電流を受けて前記動作電流を前記低電圧動作部を介して接地側に供給し、それによって前記低電圧動作部に前記低電源電圧を印加させる再利用回路と、を備え、
前記再利用回路は、
前記高電源電圧より低くかつ前記低電源電圧より高い中電源電圧が印加される中電源線と前記低電圧動作部への電圧印加線との間に接続された第1のスイッチ素子と、
前記高電圧動作部からの前記動作電流の受入線と前記電圧印加線との間に接続された第2のスイッチ素子と、
前記低電圧動作部への印加電圧が、前記低電源電圧に等しい基準電圧に等しくなるように前記第1のスイッチ素子及び前記第2のスイッチ素子をオンオフ制御するスイッチ駆動手段と、を含むことを特徴とするディスプレイ駆動装置。 - 前記再利用回路は、前記中電源電圧が供給されたとき前記低電源電圧に等しい電圧を前記電圧印加線に一時的に印加する第1のスタートアップ回路と、
前記中電源電圧が供給されたとき前記低電源電圧より高くかつ前記高電源電圧より低い電圧を前記受入線に一時的に印加する第2のスタートアップ回路と、を含むことを特徴とする請求項1記載のディスプレイ駆動装置。 - 前記再利用回路は、前記受入線に接続され、前記受入線の電圧を所定のクランプ電圧以下に抑えるクランプ回路と、
前記受入線のリップル電圧を取り除くためのバイパスコンデンサと、を含むことを特徴とする請求項1又は2記載のディスプレイ駆動装置。 - 前記ディスプレイパネルは有機ELディスプレイパネルであることを特徴とする請求項1乃至3のいずれか1記載のディスプレイ駆動装置。
- 前記駆動電圧の変動範囲は前記高電源電圧より低くかつ前記低電源電圧より高い電圧であることを特徴とする請求項1乃至4のいずれか1記載のディスプレイ駆動装置。
- 前記高電圧動作部は前記ディスプレイパネルに前記駆動電圧を出力する出力回路を有し、前記出力回路を除いた前記高電圧動作部の一部は前記動作電流を前記低電圧動作部を介すことなく前記接地側に供給することを特徴とする請求項1乃至5のいずれか1記載のディスプレイ駆動装置。
- 前記再利用回路は前記基準電圧を生成する基準電圧生成回路を更に含むことを特徴とする請求項1乃至6のいずれか1記載のディスプレイ駆動装置。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2018013271A JP6557369B2 (ja) | 2018-01-30 | 2018-01-30 | ディスプレイ駆動装置 |
US15/962,861 US10580357B2 (en) | 2018-01-30 | 2018-04-25 | Display driving device |
CN201810555585.1A CN110097849B (zh) | 2018-01-30 | 2018-06-01 | 显示器驱动装置 |
US16/788,687 US11011111B2 (en) | 2018-01-30 | 2020-02-12 | Display driving device |
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Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2018013271A JP6557369B2 (ja) | 2018-01-30 | 2018-01-30 | ディスプレイ駆動装置 |
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JP2019129377A Division JP6785342B2 (ja) | 2019-07-11 | 2019-07-11 | ディスプレイ駆動装置 |
Publications (2)
Publication Number | Publication Date |
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JP6557369B2 true JP6557369B2 (ja) | 2019-08-07 |
JP2019132918A JP2019132918A (ja) | 2019-08-08 |
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JP2018013271A Active JP6557369B2 (ja) | 2018-01-30 | 2018-01-30 | ディスプレイ駆動装置 |
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US (2) | US10580357B2 (ja) |
JP (1) | JP6557369B2 (ja) |
CN (1) | CN110097849B (ja) |
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KR101918212B1 (ko) * | 2018-03-07 | 2019-01-29 | 주식회사 이노액시스 | 전류 재사용 회로 |
CN113614822B (zh) * | 2019-03-29 | 2024-07-02 | 拉碧斯半导体株式会社 | 显示驱动设备 |
WO2022249287A1 (ja) * | 2021-05-25 | 2022-12-01 | 株式会社ソシオネクスト | ドライバ回路、送信機および通信システム |
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JP3383110B2 (ja) * | 1994-06-10 | 2003-03-04 | シャープ株式会社 | 液晶駆動用分割電圧発生器 |
JP2001337730A (ja) * | 2000-03-23 | 2001-12-07 | Internatl Business Mach Corp <Ibm> | 電圧供給回路、及び表示装置 |
US7106318B1 (en) * | 2000-04-28 | 2006-09-12 | Jps Group Holdings, Ltd. | Low power LCD driving scheme employing two or more power supplies |
US7230614B2 (en) * | 2001-05-22 | 2007-06-12 | Lg Electronics Inc. | Circuit for driving display |
JP3791355B2 (ja) * | 2001-06-04 | 2006-06-28 | セイコーエプソン株式会社 | 駆動回路、及び駆動方法 |
JP4563692B2 (ja) * | 2003-02-06 | 2010-10-13 | ルネサスエレクトロニクス株式会社 | 表示パネルの電流駆動回路及び電流駆動装置 |
WO2005088816A1 (ja) * | 2004-03-15 | 2005-09-22 | Rohm Co., Ltd | 電源装置 |
WO2006057213A1 (ja) * | 2004-11-29 | 2006-06-01 | Rohm Co., Ltd | 有機el駆動回路およびこれを用いる有機el表示装置 |
JP2007122156A (ja) | 2005-10-25 | 2007-05-17 | Ricoh Co Ltd | ボルテージレギュレータ |
JP5117762B2 (ja) * | 2007-05-18 | 2013-01-16 | 株式会社半導体エネルギー研究所 | 液晶表示装置 |
JP5080213B2 (ja) * | 2007-11-14 | 2012-11-21 | ローム株式会社 | 表示パネルの駆動装置およびそれを利用したディスプレイ装置 |
CN201234371Y (zh) * | 2008-06-30 | 2009-05-06 | 刘达亿 | 改进的发光二极管驱动电路 |
JP4768039B2 (ja) * | 2009-03-02 | 2011-09-07 | パナソニック株式会社 | 表示駆動装置および表示装置 |
US8773420B2 (en) * | 2010-01-14 | 2014-07-08 | Cypress Semiconductor Corporation | Digital driving circuits, methods and systems for liquid crystal display devices |
JP5878129B2 (ja) * | 2010-12-13 | 2016-03-08 | ローム株式会社 | 電源回路およびそれを用いたディスプレイ装置 |
KR101938700B1 (ko) * | 2011-06-17 | 2019-01-16 | 삼성전자주식회사 | 반도체 집적회로 및 반도체 집적 회로의 전원 공급 방법 |
KR20150127500A (ko) * | 2014-05-07 | 2015-11-17 | 삼성전자주식회사 | 소스 드라이버 및 이를 포함하는 디스플레이 장치. |
JP6494955B2 (ja) * | 2014-08-28 | 2019-04-03 | ラピスセミコンダクタ株式会社 | 高周波増幅回路 |
US9584122B1 (en) * | 2016-06-22 | 2017-02-28 | Apple Inc. | Integrated circuit power reduction through charge |
-
2018
- 2018-01-30 JP JP2018013271A patent/JP6557369B2/ja active Active
- 2018-04-25 US US15/962,861 patent/US10580357B2/en active Active
- 2018-06-01 CN CN201810555585.1A patent/CN110097849B/zh active Active
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2020
- 2020-02-12 US US16/788,687 patent/US11011111B2/en active Active
Also Published As
Publication number | Publication date |
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CN110097849A (zh) | 2019-08-06 |
US10580357B2 (en) | 2020-03-03 |
US20190237012A1 (en) | 2019-08-01 |
US20200184891A1 (en) | 2020-06-11 |
CN110097849B (zh) | 2023-04-04 |
US11011111B2 (en) | 2021-05-18 |
JP2019132918A (ja) | 2019-08-08 |
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