JP2008009063A - 電圧調整回路 - Google Patents
電圧調整回路 Download PDFInfo
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- JP2008009063A JP2008009063A JP2006178342A JP2006178342A JP2008009063A JP 2008009063 A JP2008009063 A JP 2008009063A JP 2006178342 A JP2006178342 A JP 2006178342A JP 2006178342 A JP2006178342 A JP 2006178342A JP 2008009063 A JP2008009063 A JP 2008009063A
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- voltage
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
- G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
- G05F1/10—Regulating voltage or current
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
- G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
- G05F1/10—Regulating voltage or current
- G05F1/46—Regulating voltage or current wherein the variable actually regulated by the final control device is dc
- G05F1/56—Regulating voltage or current wherein the variable actually regulated by the final control device is dc using semiconductor devices in series with the load as final control devices
- G05F1/561—Voltage to current converters
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
- G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
- G05F1/10—Regulating voltage or current
- G05F1/46—Regulating voltage or current wherein the variable actually regulated by the final control device is dc
- G05F1/56—Regulating voltage or current wherein the variable actually regulated by the final control device is dc using semiconductor devices in series with the load as final control devices
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
- G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
- G05F1/10—Regulating voltage or current
- G05F1/46—Regulating voltage or current wherein the variable actually regulated by the final control device is dc
- G05F1/56—Regulating voltage or current wherein the variable actually regulated by the final control device is dc using semiconductor devices in series with the load as final control devices
- G05F1/565—Regulating voltage or current wherein the variable actually regulated by the final control device is dc using semiconductor devices in series with the load as final control devices sensing a condition of the system or its load in addition to means responsive to deviations in the output of the system, e.g. current, voltage, power factor
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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
- G09G3/34—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 by control of light from an independent source
- G09G3/36—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 by control of light from an independent source using liquid crystals
Abstract
【解決手段】電圧調整回路10は、第1電源12の電圧レベルである第1電圧を第2電圧の狙い値にシフトさせて出力するレベルシフト回路部14と、任意の可変電圧幅の中心電圧の前後で電圧を可変する可変電源22を用い、電流の方向を変更しながら出力電流の大きさを可変して出力する電圧・電流変換回路部20と、一方側端子にレベルシフト回路部の出力端子が接続され、他方側端子と出力端子との間に電圧電流変換回路部の出力電流をバイアス電流として流れる抵抗素子が配置される加減算回路部32とを備え、出力端子42から第2電圧V2が出力される。
【選択図】図1
Description
−(Va/2)とすれば、I=−(Va/2)/R1となる。したがって、抵抗素子34によるバイアス電圧である調整電圧は、−{−(Va/2)/R1}R2となり、加減算回路部32の出力端子42には、第2電圧としてV2=V5−{−(Va/2)/R1}R2=V5+{(Va/2)/R1}R2が出力される。つまり、レベルシフト回路部14において第1電圧V1を抵抗分割法で降圧した狙い値V5より高い電圧を出力することができる。
Claims (4)
- 第1電圧に対し所望の電圧差を有する第2電圧を生成する電圧調整回路において、
第2電圧の狙い値に第1電圧の電圧レベルをシフトさせて出力するレベルシフト回路部と、
電圧電流変換回路であって、任意の可変電圧幅の中心電圧の前後で電圧を可変することで電流の方向を変更しながら出力電流の大きさを可変して出力する電圧電流変換回路部と、
一方側端子にレベルシフト回路部の出力端子が接続され、他方側端子と出力端子との間に電圧電流変換回路部の出力電流をバイアス電流として流れる抵抗素子が配置される加減算回路部と、
を有し、
バイアス電流と抵抗素子によるバイアス電圧を調整電圧とし、レベルシフト回路部から出力される電圧に調整電圧分が加減算された電圧を第2電圧として加減算回路部から出力することを特徴とする電圧調整回路。 - 請求項1に記載の電圧調整回路において、
電圧電流変換回路部は、
中心電圧より高い電圧側で電圧を可変するときに対し、中心電圧より低い電圧側で電圧を可変するときは、電流の方向を反対方向とすることを特徴とする電圧調整回路。 - 請求項1に記載の電圧調整回路において、
レベルシフト回路部は、抵抗分割法によって電圧レベルをシフトさせることを特徴とする電圧調整回路。 - 請求項1に記載の電圧調整回路において、
第1電圧は液晶表示駆動回路における映像信号中心電圧であり、第2電圧はコモン電極中心電圧であり、
レベルシフト回路部には映像信号中心電圧が供給され、
電圧電流変換回路部において電圧を可変することで、加減算回路部から所望のコモン電極中心電圧が出力されることを特徴とする電圧調整回路。
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2006178342A JP2008009063A (ja) | 2006-06-28 | 2006-06-28 | 電圧調整回路 |
TW096120266A TW200820208A (en) | 2006-06-28 | 2007-06-06 | Voltage adjusting circuit |
US11/823,038 US7710413B2 (en) | 2006-06-28 | 2007-06-26 | Voltage regulator |
KR1020070063568A KR100889152B1 (ko) | 2006-06-28 | 2007-06-27 | 전압 조정 회로 |
CNA2007101124904A CN101097702A (zh) | 2006-06-28 | 2007-06-28 | 电压调整电路 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2006178342A JP2008009063A (ja) | 2006-06-28 | 2006-06-28 | 電圧調整回路 |
Publications (1)
Publication Number | Publication Date |
---|---|
JP2008009063A true JP2008009063A (ja) | 2008-01-17 |
Family
ID=39011479
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2006178342A Pending JP2008009063A (ja) | 2006-06-28 | 2006-06-28 | 電圧調整回路 |
Country Status (5)
Country | Link |
---|---|
US (1) | US7710413B2 (ja) |
JP (1) | JP2008009063A (ja) |
KR (1) | KR100889152B1 (ja) |
CN (1) | CN101097702A (ja) |
TW (1) | TW200820208A (ja) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8760144B2 (en) * | 2010-06-28 | 2014-06-24 | Wuxi Vimicro Corporation | Multiple-input comparator and power converter |
CN103869859A (zh) * | 2012-12-12 | 2014-06-18 | 硕颉科技股份有限公司 | 共享电压产生电路 |
US9306609B1 (en) * | 2015-01-13 | 2016-04-05 | Huawei Technologies Co., Ltd. | DC-coupled differential circuit front end |
CN114637358A (zh) * | 2022-03-23 | 2022-06-17 | 上海艾为电子技术股份有限公司 | 一种供电电路及电子设备 |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH06331959A (ja) * | 1993-05-18 | 1994-12-02 | Sharp Corp | 液晶駆動回路 |
JPH07230073A (ja) * | 1993-12-22 | 1995-08-29 | Seiko Epson Corp | 液晶表示システム及び電源供給方法 |
JPH10142582A (ja) * | 1996-11-11 | 1998-05-29 | Nec Corp | 液晶階調電圧発生回路 |
JP2001216039A (ja) * | 1993-07-21 | 2001-08-10 | Seiko Epson Corp | 電源供給装置、液晶表示装置及び電源供給方法 |
JP2001242834A (ja) * | 2000-02-29 | 2001-09-07 | Optrex Corp | 液晶駆動回路 |
JP2006064965A (ja) * | 2004-08-26 | 2006-03-09 | Seiko Epson Corp | 電源回路、駆動装置、電気光学装置、電子機器及び駆動電圧供給方法 |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61249094A (ja) | 1985-04-26 | 1986-11-06 | 松下電器産業株式会社 | 液晶表示装置の駆動回路 |
JP3329077B2 (ja) * | 1993-07-21 | 2002-09-30 | セイコーエプソン株式会社 | 電源供給装置、液晶表示装置及び電源供給方法 |
US6121945A (en) * | 1995-08-09 | 2000-09-19 | Sanyo Electric Co., Ltd. | Liquid crystal display device |
JP3423193B2 (ja) | 1997-06-30 | 2003-07-07 | 三洋電機株式会社 | 液晶駆動回路 |
JP2002280895A (ja) | 2001-03-22 | 2002-09-27 | Matsushita Electric Ind Co Ltd | レベルシフタ回路、および画像表示応用機器 |
TW571513B (en) | 2002-10-25 | 2004-01-11 | Toppoly Optoelectronics Corp | Level shifter with body-biased circuit |
US7292217B2 (en) | 2004-03-18 | 2007-11-06 | Novatek Microelectronics Corp. | Source driver and liquid crystal display using the same |
KR101039027B1 (ko) * | 2004-12-13 | 2011-06-07 | 삼성전자주식회사 | 레벨 시프터 및 이를 포함하는 표시 장치 |
-
2006
- 2006-06-28 JP JP2006178342A patent/JP2008009063A/ja active Pending
-
2007
- 2007-06-06 TW TW096120266A patent/TW200820208A/zh unknown
- 2007-06-26 US US11/823,038 patent/US7710413B2/en active Active
- 2007-06-27 KR KR1020070063568A patent/KR100889152B1/ko not_active IP Right Cessation
- 2007-06-28 CN CNA2007101124904A patent/CN101097702A/zh active Pending
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH06331959A (ja) * | 1993-05-18 | 1994-12-02 | Sharp Corp | 液晶駆動回路 |
JP2001216039A (ja) * | 1993-07-21 | 2001-08-10 | Seiko Epson Corp | 電源供給装置、液晶表示装置及び電源供給方法 |
JPH07230073A (ja) * | 1993-12-22 | 1995-08-29 | Seiko Epson Corp | 液晶表示システム及び電源供給方法 |
JPH10142582A (ja) * | 1996-11-11 | 1998-05-29 | Nec Corp | 液晶階調電圧発生回路 |
JP2001242834A (ja) * | 2000-02-29 | 2001-09-07 | Optrex Corp | 液晶駆動回路 |
JP2006064965A (ja) * | 2004-08-26 | 2006-03-09 | Seiko Epson Corp | 電源回路、駆動装置、電気光学装置、電子機器及び駆動電圧供給方法 |
Also Published As
Publication number | Publication date |
---|---|
US20080042635A1 (en) | 2008-02-21 |
US7710413B2 (en) | 2010-05-04 |
CN101097702A (zh) | 2008-01-02 |
KR100889152B1 (ko) | 2009-03-17 |
TW200820208A (en) | 2008-05-01 |
KR20080001636A (ko) | 2008-01-03 |
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