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
Application number
MXPA02002589A
Other languages
English (en)
Inventor
Alan Hague John
Original Assignee
Thomson Licensing Sa
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Thomson Licensing Sa filed Critical Thomson Licensing Sa
Publication of MXPA02002589A publication Critical patent/MXPA02002589A/es

Links

Classifications

    • 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

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • Theoretical Computer Science (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.
MXPA02002589A 2001-03-09 2002-03-08 Reduccion de artefactos de chispa con limitacion de velocidad de exploracion rapida de baja brillantez. MXPA02002589A (es)

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)

* Cited by examiner, † Cited by third party
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
US7535450B2 (en) * 2002-02-19 2009-05-19 Thomson Licensing Method and apparatus for sparkle reduction using a split lowpass filter arrangement
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
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
WO2009086742A1 (en) * 2008-01-11 2009-07-16 Hong Kong Applied Science and Technology Research Institute Co. Ltd Method and apparatus for enhancing an image displayed on an lcd device
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

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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
EP0751682B1 (en) * 1995-06-30 2003-08-13 Mitsubishi Denki Kabushiki Kaisha Flicker reduction apparatus
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
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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

Also Published As

Publication number Publication date
BR0200723A (pt) 2003-01-07
EP1249817A3 (en) 2005-03-09
EP1249817B1 (en) 2007-08-08
JP2002366125A (ja) 2002-12-20
US20020126079A1 (en) 2002-09-12
KR20020072503A (ko) 2002-09-16
CN1379596A (zh) 2002-11-13
DE60221600D1 (de) 2007-09-20
CN1315329C (zh) 2007-05-09
DE60221600T2 (de) 2008-04-24
EP1249817A2 (en) 2002-10-16

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