JP4439552B2 - 電流源装置 - Google Patents
電流源装置 Download PDFInfo
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- JP4439552B2 JP4439552B2 JP2007260811A JP2007260811A JP4439552B2 JP 4439552 B2 JP4439552 B2 JP 4439552B2 JP 2007260811 A JP2007260811 A JP 2007260811A JP 2007260811 A JP2007260811 A JP 2007260811A JP 4439552 B2 JP4439552 B2 JP 4439552B2
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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]
- G09G3/3216—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 a passive matrix
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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
-
- 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
-
- 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
- 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]
- G09G3/3275—Details of drivers for data electrodes
- G09G3/3283—Details of drivers for data electrodes in which the data driver supplies a variable data current for setting the current through, or the voltage across, the light-emitting elements
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C5/00—Details of stores covered by group G11C11/00
- G11C5/14—Power supply arrangements, e.g. power down, chip selection or deselection, layout of wirings or power grids, or multiple supply levels
-
- 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
- G09G2310/0272—Details of drivers for data electrodes, the drivers communicating data to the pixels by means of a current
-
- 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
- G09G2310/0275—Details of drivers for data electrodes, other than drivers for liquid crystal, plasma or OLED displays, not related to handling digital grey scale data or to communication of data to the pixels by means of a current
-
- 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
- G09G2310/0291—Details of output amplifiers or buffers 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
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0223—Compensation for problems related to R-C delay and attenuation in electrodes of matrix panels, e.g. in gate electrodes or on-substrate video signal electrodes
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Control Of El Displays (AREA)
Description
(第1実施例)
図4は、本発明の第1実施例に係る電流源装置100の構成を示す等価回路図である。尚、図4においては、図2において示した従来の電流源装置の構成と共通する部分については、同一の符号を付している。本発明の電流源装置100は、従来構成のものと同様、単一のゲート電圧供給部40とデータラインA1〜Anの各々に対応するn個の電流出力回路60-1〜60-nからなる出力部50により構成される。
第1実施例に示す電流源装置100においては、上記の如く、1番目からn-1番目の電流出力回路を電流供給状態から電流供給停止状態に移行させたときに生じる不具合を解消させることが可能である。しかし、電流供給停止状態となっている1番目からn-1番目の電流出力回路を再度同時に電流供給状態に移行させると新たな不具合が発生するおそれがある。この新たな不具合について、図6を参照しつつ説明する。尚、n番目の電流出力回路については、電流供給を継続しているものとする。
(第3実施例)
図9に、本発明の第3実施例に係る電流源装置300の等価回路図を示す。本実施例の電流源装置300の基本構成は、第2実施例のものと同一であるが、電流出力回路80-1〜80-nの構成が第2実施例のものと若干異なる。すなわち、本実施例に係る電流出力回路80-1〜80-nにおいては、第2実施例に係る電流出力回路に対してNMOSトランジスタN12が更に追加される。具体的にはNMOSトランジスタN12のドレインは、PMOSトランジスタP4のドレイン、すなわちノード1に接続され、ソースはNMOSトランジスタN11のドレインに接続され、ゲートには外部よりゲートバイアス電圧Bias1が供給される。ゲートバイアス電圧Bias1は、NMOSトランジスタN12の閾値電圧より若干高い電位に設定される。これにより、NMOSトランジスタN12はオン状態となるが、ゲートバイアス電圧Bias1に応じたオン抵抗を有することとなる。すなわち、NMOSトランジスタN12はNMOSトランジスタN11に直列接続された抵抗素子として機能する。
50 出力部
60−1〜60−n 電流出力回路
70−1〜70−n 電流出力回路
80−1〜80−n 電流出力回路
OP1 演算増幅器
P1〜P11 PMOSトランジスタ
N1〜N12 NMOSトランジスタ
Claims (5)
- 電流出力FETと、前記電流出力FETのソース側およびドレイン側の各々に直列に接続されて直列回路を形成する第1および第2スイッチFETと、前記第1スイッチFETに電源電圧の正側電位を印加するとともに前記第2スイッチFETに前記電源電圧の負側電位を印加して前記直列回路に前記電源電圧を供給する電源電圧供給手段と、前記電流出力FETと前記第2スイッチFETとの間に接続された出力端子と、を各々が含む複数の電流出力回路と、前記電流出力FETの各々のゲートに共通のゲート電圧を供給するゲート電圧供給回路と、を含む電流源装置であって、
前記電流出力回路の各々は、前記電流出力FETと前記出力端子との間に設けられた第3スイッチFETを更に有することを特徴とする電流源装置。 - 前記電流出力回路の各々は、前記第2および第3スイッチFETからなる直列回路に並列接続されている電位固定FETを更に有することを特徴とする請求項1に記載の電流源装置。
- 前記電位固定FETは、前記第2スイッチFETよりもスイッチングタイムが遅いことを特徴とする請求項2に記載の電流源装置。
- 前記電位固定FETに直列接続された抵抗素子を更に有することを特徴とする請求項3に記載の電流源装置。
- 前記第1および第3スイッチFETはPMOSトランジスタであり、前記第2スイッチFETはNMOSトランジスタであることを特徴とする請求項1乃至4のいずれか1に記載の電流源装置。
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2007260811A JP4439552B2 (ja) | 2007-10-04 | 2007-10-04 | 電流源装置 |
US12/147,618 US20090052568A1 (en) | 2007-07-25 | 2008-06-27 | Qam communication system and method thereof and qam receiving apparatus and method thereof |
CN2008101320406A CN101404139B (zh) | 2007-10-04 | 2008-07-18 | 电流源装置 |
US12/180,740 US7863970B2 (en) | 2007-10-04 | 2008-07-28 | Current source device |
KR1020080076877A KR101519437B1 (ko) | 2007-10-04 | 2008-08-06 | 전류원 장치 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2007260811A JP4439552B2 (ja) | 2007-10-04 | 2007-10-04 | 電流源装置 |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2009092744A JP2009092744A (ja) | 2009-04-30 |
JP4439552B2 true JP4439552B2 (ja) | 2010-03-24 |
Family
ID=40522734
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2007260811A Active JP4439552B2 (ja) | 2007-07-25 | 2007-10-04 | 電流源装置 |
Country Status (4)
Country | Link |
---|---|
US (1) | US7863970B2 (ja) |
JP (1) | JP4439552B2 (ja) |
KR (1) | KR101519437B1 (ja) |
CN (1) | CN101404139B (ja) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1903318B1 (de) * | 2006-09-22 | 2009-03-25 | Siemens Aktiengesellschaft | Erhöhung der Verfügbarkeit und Redundanz von Analogstromausgaben |
JP4717091B2 (ja) * | 2008-02-29 | 2011-07-06 | Okiセミコンダクタ株式会社 | 表示パネル駆動装置 |
JP6117399B2 (ja) * | 2016-04-21 | 2017-04-19 | ラピスセミコンダクタ株式会社 | 定電流出力ドライバ及びこれを含む半導体装置 |
CN118590781A (zh) * | 2017-11-06 | 2024-09-03 | 索尼半导体解决方案公司 | 摄像装置 |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3742230B2 (ja) * | 1998-08-28 | 2006-02-01 | 株式会社東芝 | 電流発生回路 |
JP2001056669A (ja) | 1999-01-29 | 2001-02-27 | Seiko Instruments Inc | 定電流出力用ドライバ |
JP3859483B2 (ja) | 2001-10-26 | 2006-12-20 | 沖電気工業株式会社 | 駆動回路 |
JP3887229B2 (ja) * | 2001-12-28 | 2007-02-28 | 沖電気工業株式会社 | 電流駆動型表示装置の駆動回路 |
US7180513B2 (en) * | 2002-04-26 | 2007-02-20 | Toshiba Matsushita Display Technology Co., Ltd. | Semiconductor circuits for driving current-driven display and display |
JP4059712B2 (ja) * | 2002-06-11 | 2008-03-12 | 沖電気工業株式会社 | 表示素子用電流出力回路部の制御回路 |
JP4743685B2 (ja) * | 2005-01-06 | 2011-08-10 | 東北パイオニア株式会社 | 発光表示パネルの駆動装置および駆動方法 |
JP2007187714A (ja) | 2006-01-11 | 2007-07-26 | Matsushita Electric Ind Co Ltd | 電流駆動装置 |
JP2007240698A (ja) * | 2006-03-07 | 2007-09-20 | Oki Electric Ind Co Ltd | 電流駆動回路 |
-
2007
- 2007-10-04 JP JP2007260811A patent/JP4439552B2/ja active Active
-
2008
- 2008-07-18 CN CN2008101320406A patent/CN101404139B/zh not_active Expired - Fee Related
- 2008-07-28 US US12/180,740 patent/US7863970B2/en not_active Expired - Fee Related
- 2008-08-06 KR KR1020080076877A patent/KR101519437B1/ko active IP Right Grant
Also Published As
Publication number | Publication date |
---|---|
KR101519437B1 (ko) | 2015-05-12 |
KR20090034717A (ko) | 2009-04-08 |
US20090091359A1 (en) | 2009-04-09 |
CN101404139B (zh) | 2013-01-23 |
CN101404139A (zh) | 2009-04-08 |
US7863970B2 (en) | 2011-01-04 |
JP2009092744A (ja) | 2009-04-30 |
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