JP2005338786A - ディスプレイ用照明光源周波数制御システム - Google Patents
ディスプレイ用照明光源周波数制御システム Download PDFInfo
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- JP2005338786A JP2005338786A JP2005112770A JP2005112770A JP2005338786A JP 2005338786 A JP2005338786 A JP 2005338786A JP 2005112770 A JP2005112770 A JP 2005112770A JP 2005112770 A JP2005112770 A JP 2005112770A JP 2005338786 A JP2005338786 A JP 2005338786A
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- Prior art keywords
- light source
- illumination light
- frequency control
- source frequency
- display
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-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
- H05B41/14—Circuit arrangements
- H05B41/26—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc
- H05B41/28—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters
- H05B41/282—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters with semiconductor devices
- H05B41/2821—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters with semiconductor devices by means of a single-switch converter or a parallel push-pull converter in the final stage
- H05B41/2824—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters with semiconductor devices by means of a single-switch converter or a parallel push-pull converter in the final stage using control circuits for the switching 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
- G09G3/34—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
- G09G3/3406—Control of illumination source
-
- 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
- G09G3/3611—Control of matrices with row and column drivers
- G09G3/3614—Control of polarity reversal in general
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
- H05B41/14—Circuit arrangements
- H05B41/36—Controlling
-
- 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
- G09G2310/08—Details of timing specific for flat panels, other than clock recovery
-
- 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
- G09G2320/0247—Flicker reduction other than flicker reduction circuits used for single beam cathode-ray tubes
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Circuit Arrangements For Discharge Lamps (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Liquid Crystal Display Device Control (AREA)
Abstract
【解決手段】 本発明のディスプレイ用照明光源周波数制御システム30は、駆動制御装置31と照明光源周波数制御装置32を有する。駆動制御装置31は、少なくとも2種類の駆動モードから駆動モードを選択する駆動モードセレクタ311を備える。選択された駆動モードに従って、駆動モードセレクタ311は少なくとも1つの対応する周波数制御信号を出力する。その周波数制御信号に従って、照明光源周波数制御装置32は少なくとも1つの対応する照明光源周波数を取得する。様々な駆動モードに従って、照明光源周波数制御システム30は対応する照明光源周波数を取得する。すなわち、照明光源周波数を駆動モードと一致する周波数に調整することが可能である。そのため、照明光源周波数は水波紋状の干渉現象なく、周波数領域で調整可能である。
【選択図】 図3
Description
12 コンバータ
15 ディスプレイパネル
16 駆動装置
30 ディスプレイ用照明光源周波数制御システム
31 駆動制御装置
32 照明光源周波数制御装置
33 ディスプレイパネル
34 照明光源
35 フィードバック回路
311 駆動モードセレクタ
312 周波数制御信号
313 ドット反転ドライバ
314 ライン反転ドライバ
321 対応表
321 コンバータ
Claims (10)
- 少なくとも2種類の駆動モードから駆動モードを選択し、該選択された駆動モードに従って少なくとも一つの対応する周波数制御信号を出力する駆動モードセレクタを備える駆動制御装置と、
前記周波数制御信号に従って少なくとも一つの対応する照明光源周波数を取得するための照明光源周波数制御装置と、
を有することを特徴とするディスプレイ用照明光源周波数制御システム。 - 動作周波数として前記照明光源周波数に基づいて直流電流を交流電流に変換するコンバータをさらに有する、請求項1に記載のディスプレイ用照明光源周波数制御システム。
- 前記照明光源周波数制御装置は、前記周波数制御信号に従って少なくとも一つの対応する照明光源周波数を取得するための対応表を備える、請求項1に記載のディスプレイ用照明光源周波数制御システム。
- 前記駆動モードは、ドット反転モード及びライン反転モードである、請求項1に記載のディスプレイ用照明光源周波数制御システム。
- 前記ドット反転モードに対応する前記周波数制御信号は高レベル信号であり、且つ前記ライン反転モードに対応する前記周波数制御信号は低レベル信号である、請求項4に記載のディスプレイ用照明光源周波数制御システム。
- 前記ドット反転モードに対応する前記照明光源周波数は44±3KHzであり、且つ前記ライン反転モードに対応する前記照明光源周波数は33±3KHzである、請求項4に記載のディスプレイ用照明光源周波数制御システム。
- 前記照明光源周波数制御装置は、照明光源電流を安定化するために該照明光源電流を補償するためのフィードバック回路をさらに有する、請求項1に記載のディスプレイ用照明光源周波数制御システム。
- (a)少なくとも2種類の駆動モードから駆動モードを選択するステップと、
(b)前記選択された駆動モードに従って、少なくとも一つの対応する周波数制御信号を出力するステップと、
(c)前記周波数制御信号に従って、少なくとも一つの対応する照明光源周波数を取得するステップと、
を含むことを特徴とするディスプレイ用照明光源周波数制御方法。 - 前記照明光源周波数に従って、直流電流を交流電流に変換する変換ステップをさらに含む、請求項8に記載の方法。
- 照明光源電流を安定化するために、該照明光源電流を補償するフィードバックステップをさらに含む、請求項8に記載の方法。
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
TW093109787A TWI259031B (en) | 2004-04-08 | 2004-04-08 | Lamp frequency control system for display |
Publications (1)
Publication Number | Publication Date |
---|---|
JP2005338786A true JP2005338786A (ja) | 2005-12-08 |
Family
ID=35374569
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2005112770A Pending JP2005338786A (ja) | 2004-04-08 | 2005-04-08 | ディスプレイ用照明光源周波数制御システム |
Country Status (3)
Country | Link |
---|---|
US (1) | US7456816B2 (ja) |
JP (1) | JP2005338786A (ja) |
TW (1) | TWI259031B (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8519940B2 (en) | 2008-12-24 | 2013-08-27 | Samsung Display Co., Ltd. | Display apparatus capable of changing dimming frequency of back light and control method thereof |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20080061686A (ko) * | 2006-12-28 | 2008-07-03 | 삼성전자주식회사 | 백라이트 어셈블리와 이의 구동 방법 그리고 이를 구비하는액정 표시 장치 |
KR101415064B1 (ko) * | 2007-12-11 | 2014-07-04 | 엘지디스플레이 주식회사 | 액정표시장치의 구동 제어 장치 및 방법 |
US8830155B2 (en) * | 2009-10-30 | 2014-09-09 | Au Optronics Corporation | Method and source driver for driving liquid crystal display |
KR101842064B1 (ko) * | 2011-05-18 | 2018-03-27 | 삼성디스플레이 주식회사 | 액정 표시 장치의 구동 장치 및 방법 |
CN102646400B (zh) * | 2011-08-15 | 2013-12-18 | 北京京东方光电科技有限公司 | 一种显示器驱动电路、驱动方法及液晶显示装置 |
US10607522B1 (en) * | 2015-12-28 | 2020-03-31 | Amazon Technologies, Inc. | Adaptive drive scheme for electrowetting displays |
KR102511559B1 (ko) * | 2018-01-26 | 2023-03-16 | 엘지디스플레이 주식회사 | 액정표시장치 및 그 컨트롤러, 그 구동방법 |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
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JPH02139521A (ja) * | 1988-11-21 | 1990-05-29 | Canon Inc | 表示制御装置 |
JPH0468491A (ja) * | 1990-07-10 | 1992-03-04 | Sanyo Electric Co Ltd | 自動販売機 |
JPH05113766A (ja) * | 1991-10-21 | 1993-05-07 | Sharp Corp | バツクライト付液晶表示装置 |
JP2002008887A (ja) * | 2000-06-26 | 2002-01-11 | Nec Mitsubishi Denki Visual Systems Kk | バックライト駆動回路 |
JP2002365611A (ja) * | 2001-06-11 | 2002-12-18 | Fujitsu Ten Ltd | 液晶表示装置 |
JP2003075803A (ja) * | 2001-08-31 | 2003-03-12 | Matsushita Electric Ind Co Ltd | Lcdバックライト電源装置 |
Family Cites Families (5)
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JPH09218670A (ja) * | 1996-02-14 | 1997-08-19 | Fujitsu Ltd | 表示モード判別機能付き表示装置および表示モード判別方法 |
JP3829507B2 (ja) * | 1997-12-12 | 2006-10-04 | 松下電工株式会社 | 電子バラストおよびhidランプ制御回路 |
KR20030084020A (ko) * | 2002-04-24 | 2003-11-01 | 삼성전자주식회사 | 액정 표시 장치 및 그 구동 방법 |
TWI232070B (en) * | 2003-02-27 | 2005-05-01 | Chi Mei Optoelectronics Corp | Device and method to dynamically adjust the burst mode switching frequency for LCD |
JP2006039337A (ja) * | 2004-07-29 | 2006-02-09 | Nec Electronics Corp | 液晶表示装置及びその駆動回路 |
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2004
- 2004-04-08 TW TW093109787A patent/TWI259031B/zh not_active IP Right Cessation
-
2005
- 2005-04-07 US US11/101,169 patent/US7456816B2/en not_active Expired - Fee Related
- 2005-04-08 JP JP2005112770A patent/JP2005338786A/ja active Pending
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH02139521A (ja) * | 1988-11-21 | 1990-05-29 | Canon Inc | 表示制御装置 |
JPH0468491A (ja) * | 1990-07-10 | 1992-03-04 | Sanyo Electric Co Ltd | 自動販売機 |
JPH05113766A (ja) * | 1991-10-21 | 1993-05-07 | Sharp Corp | バツクライト付液晶表示装置 |
JP2002008887A (ja) * | 2000-06-26 | 2002-01-11 | Nec Mitsubishi Denki Visual Systems Kk | バックライト駆動回路 |
JP2002365611A (ja) * | 2001-06-11 | 2002-12-18 | Fujitsu Ten Ltd | 液晶表示装置 |
JP2003075803A (ja) * | 2001-08-31 | 2003-03-12 | Matsushita Electric Ind Co Ltd | Lcdバックライト電源装置 |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8519940B2 (en) | 2008-12-24 | 2013-08-27 | Samsung Display Co., Ltd. | Display apparatus capable of changing dimming frequency of back light and control method thereof |
Also Published As
Publication number | Publication date |
---|---|
US20050258780A1 (en) | 2005-11-24 |
TWI259031B (en) | 2006-07-21 |
TW200534748A (en) | 2005-10-16 |
US7456816B2 (en) | 2008-11-25 |
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