MXPA02002589A - Reduccion de artefactos de chispa con limitacion de velocidad de exploracion rapida de baja brillantez. - Google Patents
Reduccion de artefactos de chispa con limitacion de velocidad de exploracion rapida de baja brillantez.Info
- Publication number
- MXPA02002589A MXPA02002589A MXPA02002589A MXPA02002589A MXPA02002589A MX PA02002589 A MXPA02002589 A MX PA02002589A MX PA02002589 A MXPA02002589 A MX PA02002589A MX PA02002589 A MXPA02002589 A MX PA02002589A MX PA02002589 A MXPA02002589 A MX PA02002589A
- Authority
- MX
- Mexico
- Prior art keywords
- slew rate
- signal
- brightness level
- level signal
- rate limiting
- Prior art date
Links
Classifications
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- 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
- 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
- G09G3/34—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
-
- 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
- G09G2320/0209—Crosstalk reduction, i.e. to reduce direct or indirect influences of signals directed to a certain pixel of the displayed image on other pixels of said image, inclusive of influences affecting pixels in different frames or fields or sub-images which constitute a same image, e.g. left and right images of a stereoscopic display
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Computer Hardware Design (AREA)
- Crystallography & Structural Chemistry (AREA)
- Chemical & Material Sciences (AREA)
- Nonlinear Science (AREA)
- Mathematical Physics (AREA)
- Optics & Photonics (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Liquid Crystal Display Device Control (AREA)
- Picture Signal Circuits (AREA)
Abstract
Una senal de video (INPUT X) es reducida en una senal de nivel de brillantez mas alto (HIGH) y una senal de nivel de brillantez mas bajo (LOW). El umbral (T) entre los niveles de brillantez mas alto y mas bajo se pueden ajustar y relacionar con la transicion entre las porciones de ganancia mas alta y mas baja de la tabla gama para un formador de imagenes de cristal liquido asociado. La senal de nivel de brillantez mas bajo es limitada por exploracion (en el 22) para reducir la diferencia en la brillantez entre los pixeles adyacentes. La senal de nivel de brillantez mas alto se retrasa en tiempo (en el 24) para igualar el retraso de procesamiento a traves del limitador de exploracion. La senal igualada retrasada y la senal limitada por exploracion se combinan (en el 26) para formar una senal de video modificada (OUTPUT X') menos propensa a dar como resultado artefactos de chispa en el formador de imagenes. El procesamiento de reduccion de chispa se puede aplicar en las senales de luminiscencia y las senales de excitacion de video en varias combinaciones, con base en umbrales que se pueden seleccionar en forma independiente.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/803,248 US20020126079A1 (en) | 2001-03-09 | 2001-03-09 | Reducing sparkle artifacts with low brightness slew rate limiting |
Publications (1)
Publication Number | Publication Date |
---|---|
MXPA02002589A true MXPA02002589A (es) | 2004-11-12 |
Family
ID=25186011
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
MXPA02002589A MXPA02002589A (es) | 2001-03-09 | 2002-03-08 | Reduccion de artefactos de chispa con limitacion de velocidad de exploracion rapida de baja brillantez. |
Country Status (8)
Country | Link |
---|---|
US (1) | US20020126079A1 (es) |
EP (1) | EP1249817B1 (es) |
JP (1) | JP2002366125A (es) |
KR (1) | KR20020072503A (es) |
CN (1) | CN1315329C (es) |
BR (1) | BR0200723A (es) |
DE (1) | DE60221600T2 (es) |
MX (1) | MXPA02002589A (es) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7119774B2 (en) * | 2001-03-09 | 2006-10-10 | Thomson Licensing | Reducing sparkle artifacts with low brightness filtering |
US7495640B2 (en) * | 2001-03-12 | 2009-02-24 | Thomson Licensing | Reducing sparkle artifacts with post gamma correction slew rate limiting |
US6961039B2 (en) * | 2002-02-19 | 2005-11-01 | Thomson Licensing S.A. | Method and apparatus for sparkle reduction by reactive and anticipatory slew rate limiting |
US7535450B2 (en) * | 2002-02-19 | 2009-05-19 | Thomson Licensing | Method and apparatus for sparkle reduction using a split lowpass filter arrangement |
US8400385B2 (en) * | 2007-12-21 | 2013-03-19 | Hong Kong Applied Science and Technology Research Institute Company Limited | Method for enhancing an image displayed on an LCD device |
CN101568956B (zh) * | 2008-01-11 | 2011-09-07 | 香港应用科技研究院有限公司 | 增强lcd设备上显示图像的方法和装置 |
US10613727B2 (en) | 2016-02-19 | 2020-04-07 | Ppg Industries Ohio, Inc. | Color and texture match ratings for optimal match selection |
CN111028768A (zh) * | 2019-12-27 | 2020-04-17 | 北京集创北方科技股份有限公司 | 信号产生装置、驱动芯片、显示系统与led显示的驱动方法 |
Family Cites Families (25)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4499497A (en) * | 1982-12-27 | 1985-02-12 | Rca Corporation | CCD Imager with improved low light level response |
GB8329109D0 (en) * | 1983-11-01 | 1983-12-07 | Rca Corp | Perceived signal-to-noise ratio of displayed images |
US4799105A (en) * | 1984-03-14 | 1989-01-17 | International Business Machines Corporation | Modified technique for suppression of flicker in interlaced video images |
JPH0758881B2 (ja) * | 1987-07-10 | 1995-06-21 | 日本放送協会 | スル−レ−ト制限フィルタ |
JPH0353687A (ja) * | 1989-07-21 | 1991-03-07 | Sony Corp | 映像信号記録装置の帯域制限器 |
US5019904A (en) * | 1989-12-04 | 1991-05-28 | Campbell Jack J | Scan converter with adaptive vertical filter for single bit computer graphics systems |
JP2558193B2 (ja) * | 1991-09-09 | 1996-11-27 | 池上通信機株式会社 | 被検体表面の撮像及び検査装置 |
JPH05314446A (ja) * | 1992-05-12 | 1993-11-26 | Victor Co Of Japan Ltd | アクチュエータ駆動回路 |
KR940008510A (ko) * | 1992-09-14 | 1994-04-29 | 김광호 | 고체촬상소자(ccd)형 컬러비디오카메라의 비디오신호처리회로 |
JPH07212645A (ja) * | 1994-01-25 | 1995-08-11 | Hitachi Denshi Ltd | テレビジョンカメラ |
US5442407A (en) * | 1994-03-22 | 1995-08-15 | Matsushita Electric Corporation Of America | Video signal noise reduction system using time-varying filter coefficients |
US6181368B1 (en) * | 1994-04-14 | 2001-01-30 | Asahi Kogaku Kogyo Kabushiki Kaisha | Electronic endoscope |
JPH0875602A (ja) * | 1994-09-01 | 1996-03-22 | Sharp Corp | フリッカ成分測定装置 |
DE69629423T2 (de) * | 1995-06-30 | 2004-06-17 | Mitsubishi Denki K.K. | Vorrichtung zur Flimmerreduzierung |
GB2305054B (en) * | 1995-08-29 | 2000-03-22 | British Broadcasting Corp | Blemish concealment in video signals |
US5786866A (en) * | 1996-10-15 | 1998-07-28 | Fairchild Semiconductor Corporation | Video color subcarrier signal generator |
KR19980079061A (ko) * | 1997-04-30 | 1998-11-25 | 배순훈 | 휘도 및 색 신호 분리 방법 및 이를 수행하기 위한 휘도 및 색 신호 분리 회로 |
JPH11260092A (ja) * | 1998-03-13 | 1999-09-24 | Samsung Japan Corp | サンプルホールド回路 |
WO2000010326A2 (en) * | 1998-08-12 | 2000-02-24 | Focus Enhancements, Inc. | Two-dimensional adjustable flicker filter |
JP3255129B2 (ja) * | 1998-12-10 | 2002-02-12 | 日本電気株式会社 | フリッカ低減装置及びフリッカ低減方法 |
JP3660830B2 (ja) * | 1999-07-02 | 2005-06-15 | 株式会社東芝 | フリッカ低減方法及びフリッカ低減回路 |
US6731257B2 (en) * | 2001-01-22 | 2004-05-04 | Brillian Corporation | Image quality improvement for liquid crystal displays |
US7071909B2 (en) * | 2001-03-09 | 2006-07-04 | Thomson Licensing | Reducing sparkle artifacts with low brightness processing |
US7119774B2 (en) * | 2001-03-09 | 2006-10-10 | Thomson Licensing | Reducing sparkle artifacts with low brightness filtering |
US7535450B2 (en) * | 2002-02-19 | 2009-05-19 | Thomson Licensing | Method and apparatus for sparkle reduction using a split lowpass filter arrangement |
-
2001
- 2001-03-09 US US09/803,248 patent/US20020126079A1/en not_active Abandoned
-
2002
- 2002-03-07 KR KR1020020012076A patent/KR20020072503A/ko active IP Right Grant
- 2002-03-08 MX MXPA02002589A patent/MXPA02002589A/es active IP Right Grant
- 2002-03-08 EP EP02290586A patent/EP1249817B1/en not_active Expired - Lifetime
- 2002-03-08 DE DE60221600T patent/DE60221600T2/de not_active Expired - Fee Related
- 2002-03-09 CN CNB021200882A patent/CN1315329C/zh not_active Expired - Fee Related
- 2002-03-11 JP JP2002066045A patent/JP2002366125A/ja not_active Withdrawn
- 2002-03-11 BR BR0200723-1A patent/BR0200723A/pt not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
CN1315329C (zh) | 2007-05-09 |
DE60221600T2 (de) | 2008-04-24 |
DE60221600D1 (de) | 2007-09-20 |
JP2002366125A (ja) | 2002-12-20 |
EP1249817A2 (en) | 2002-10-16 |
BR0200723A (pt) | 2003-01-07 |
CN1379596A (zh) | 2002-11-13 |
EP1249817A3 (en) | 2005-03-09 |
KR20020072503A (ko) | 2002-09-16 |
EP1249817B1 (en) | 2007-08-08 |
US20020126079A1 (en) | 2002-09-12 |
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Legal Events
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FG | Grant or registration |