WO2000021303A1 - η CORRECTION CIRCUIT AND η CORRECTION METHOD - Google Patents
η CORRECTION CIRCUIT AND η CORRECTION METHOD Download PDFInfo
- Publication number
- WO2000021303A1 WO2000021303A1 PCT/JP1999/005472 JP9905472W WO0021303A1 WO 2000021303 A1 WO2000021303 A1 WO 2000021303A1 JP 9905472 W JP9905472 W JP 9905472W WO 0021303 A1 WO0021303 A1 WO 0021303A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- correction
- value
- correction circuit
- executing
- primary conversion
- Prior art date
Links
- 238000012937 correction Methods 0.000 title claims abstract description 135
- 238000000034 method Methods 0.000 title claims description 7
- 238000006243 chemical reaction Methods 0.000 claims abstract description 90
- 239000004973 liquid crystal related substance Substances 0.000 claims description 6
- 235000019557 luminance Nutrition 0.000 description 35
- 238000010586 diagram Methods 0.000 description 12
- 230000014509 gene expression Effects 0.000 description 7
- 239000003086 colorant Substances 0.000 description 2
- 241001270131 Agaricus moelleri Species 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
Classifications
-
- 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
- G09G3/2092—Details of a display terminals using a flat panel, the details relating to the control arrangement of the display terminal and to the interfaces thereto
- G09G3/2096—Details of the interface to the display terminal specific for a flat panel
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/64—Circuits for processing colour signals
- H04N9/68—Circuits for processing colour signals for controlling the amplitude of colour signals, e.g. automatic chroma control circuits
- H04N9/69—Circuits for processing colour signals for controlling the amplitude of colour signals, e.g. automatic chroma control circuits for modifying the colour signals by gamma correction
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/14—Picture signal circuitry for video frequency region
- H04N5/20—Circuitry for controlling amplitude response
- H04N5/202—Gamma control
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/66—Transforming electric information into light information
-
- 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
- G09G2320/0271—Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping
- G09G2320/0276—Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping for the purpose of adaptation to the characteristics of a display device, i.e. gamma correction
-
- 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
- G09G2320/06—Adjustment of display parameters
- G09G2320/066—Adjustment of display parameters for control of contrast
-
- 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
- G09G2320/06—Adjustment of display parameters
- G09G2320/0666—Adjustment of display parameters for control of colour parameters, e.g. colour temperature
-
- 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
Definitions
- a sixth aspect is a ⁇ correction circuit according to the first aspect, wherein the above mentioned secondary conversion means has a table denoting a relationship between pre- ⁇ 2 correction and post ⁇ 2 correction.
- the secondary conversion section 112 converts the primary conversion values Z1, Z2 and Z3 sent from the primary conversion section 111 to the secondary conversion values Y1, Y2 and Y3 respectively.
- the secondary conversion section 112 executes the conversion using the table 121 stored in the non-volatile storage device 120.
- the table 121 has ⁇ 2 characteristic data 121 on the display device, as shown in Fig. 5.
- ⁇ 2 conversion is executed on the representative luminance values which were reverse ⁇ 1 converted.
- the following calculation is executed by the primary conversion section 111.
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020007005877A KR100342964B1 (en) | 1998-10-06 | 1999-10-05 | γCORRECTION CIRCUIT AND γ CORRECTION METHOD |
EP99970243A EP1046307A1 (en) | 1998-10-06 | 1999-10-05 | Gamma correction circuit and gamma correction method |
AU60031/99A AU739565B2 (en) | 1998-10-06 | 1999-10-05 | Gamma correction circuit and gamma correction method |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP28369098 | 1998-10-06 | ||
JP10/283690 | 1998-10-06 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2000021303A1 true WO2000021303A1 (en) | 2000-04-13 |
Family
ID=17668826
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP1999/005472 WO2000021303A1 (en) | 1998-10-06 | 1999-10-05 | η CORRECTION CIRCUIT AND η CORRECTION METHOD |
Country Status (7)
Country | Link |
---|---|
US (1) | US6340996B1 (en) |
EP (1) | EP1046307A1 (en) |
KR (1) | KR100342964B1 (en) |
CN (1) | CN1277785A (en) |
AU (1) | AU739565B2 (en) |
TW (1) | TW454415B (en) |
WO (1) | WO2000021303A1 (en) |
Families Citing this family (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
TW508560B (en) * | 2001-04-03 | 2002-11-01 | Chunghwa Picture Tubes Ltd | Method for performing different anti-compensation processes by segments on image gray levels inputted to plasma flat display |
US7038721B2 (en) * | 2002-02-15 | 2006-05-02 | Koninklijke Philips Electronics N.V. | Gamma correction circuit |
KR100493293B1 (en) * | 2002-10-31 | 2005-06-02 | 엘지전자 주식회사 | Method for interpolating gamma of video signal using the nonlinear sampling |
US7042523B2 (en) * | 2003-06-30 | 2006-05-09 | Texas Instruments Incorporated | Video correction system and method using logarithmic conversion |
US7154562B1 (en) * | 2003-10-14 | 2006-12-26 | Cirrus Logic, Inc. | Methods and circuits for implementing programmable gamma correction |
KR100533727B1 (en) * | 2003-12-01 | 2005-12-06 | 엘지전자 주식회사 | Apparatus for Driving Plasma Display Panel |
EP1758075A1 (en) * | 2004-06-18 | 2007-02-28 | Kabushiki Kaisha Toshiba | Video display device and video display device luminance characteristic correction method |
CN100446464C (en) * | 2006-04-29 | 2008-12-24 | 华为技术有限公司 | Method for correcting video stream gamma characteristic |
US8614719B2 (en) * | 2006-07-12 | 2013-12-24 | Freescale Semiconductor, Inc. | Method for gamma correction and a device having gamma correction capabilities |
TWI315151B (en) | 2006-11-10 | 2009-09-21 | Ind Tech Res Inst | System and method of performing multi-scaled clocks for dynamic gamma correction |
JP4428389B2 (en) * | 2007-01-25 | 2010-03-10 | 船井電機株式会社 | Information output unit and electronic device |
KR101264718B1 (en) * | 2007-04-02 | 2013-05-16 | 엘지디스플레이 주식회사 | Method and Apparatus for Compensating Display Defect of Flat Display |
KR101517360B1 (en) * | 2008-12-05 | 2015-05-04 | 삼성전자주식회사 | Apparatus and method for enhancing image based on luminance information of pixel |
KR101349782B1 (en) * | 2011-12-08 | 2014-01-16 | 엘지디스플레이 주식회사 | Timing controller, liquid crystal display device comprising timing controller and driving method of liquid crystal display device |
KR102454423B1 (en) * | 2015-10-29 | 2022-10-17 | 삼성디스플레이 주식회사 | Display device |
Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5298915A (en) * | 1989-04-10 | 1994-03-29 | Cirrus Logic, Inc. | System and method for producing a palette of many colors on a display screen having digitally-commanded pixels |
US5303055A (en) * | 1991-12-05 | 1994-04-12 | Texas Instruments Incorporated | Method and apparatus to improve a video signal |
EP0606993A2 (en) * | 1993-01-11 | 1994-07-20 | Canon Kabushiki Kaisha | Colour gamut clipping |
US5483256A (en) * | 1993-01-05 | 1996-01-09 | Nec Corporation | LCD driving analog nonlinear operation circuit producing a composite drive voltage of function voltages of differential amplifiers |
EP0708433A2 (en) * | 1994-10-20 | 1996-04-24 | Canon Kabushiki Kaisha | Display control apparatus and method |
US5546101A (en) * | 1993-03-02 | 1996-08-13 | Fujitsu General Limited | Color display unit with plasma display panel |
US5610666A (en) * | 1994-12-19 | 1997-03-11 | Nec Corporation | Gamma correcting circuit |
EP0810778A2 (en) * | 1996-05-31 | 1997-12-03 | SANYO ELECTRIC Co., Ltd. | Digital still camera with a gamma correction circuit |
EP0831643A2 (en) * | 1996-09-18 | 1998-03-25 | Matsushita Electric Industrial Co., Ltd. | Plasma display panel and method of controlling brightness of the same |
EP0947975A1 (en) * | 1998-04-02 | 1999-10-06 | Hitachi, Ltd. | Gamma correction circuit |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2924079B2 (en) | 1990-05-14 | 1999-07-26 | ソニー株式会社 | Gamma correction circuit |
JPH04271577A (en) | 1991-02-27 | 1992-09-28 | Toshiba Corp | Gamma correction system for liquid crystal display device |
JPH07152347A (en) | 1993-11-29 | 1995-06-16 | Sanyo Electric Co Ltd | Gamma characteristic correcting method for liquid crystal display device and liquid crystal display device |
JPH0818826A (en) | 1994-06-27 | 1996-01-19 | Sharp Corp | Digital gamma correction circuit |
JP3766998B2 (en) | 1995-12-20 | 2006-04-19 | ソニー株式会社 | Gamma correction circuit |
JPH10145806A (en) | 1996-11-08 | 1998-05-29 | Fujitsu General Ltd | White balance adjustment circuit |
-
1999
- 1999-10-05 WO PCT/JP1999/005472 patent/WO2000021303A1/en not_active Application Discontinuation
- 1999-10-05 TW TW088117134A patent/TW454415B/en not_active IP Right Cessation
- 1999-10-05 CN CN99801527A patent/CN1277785A/en active Pending
- 1999-10-05 AU AU60031/99A patent/AU739565B2/en not_active Ceased
- 1999-10-05 EP EP99970243A patent/EP1046307A1/en not_active Ceased
- 1999-10-05 US US09/412,509 patent/US6340996B1/en not_active Expired - Fee Related
- 1999-10-05 KR KR1020007005877A patent/KR100342964B1/en not_active IP Right Cessation
Patent Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5298915A (en) * | 1989-04-10 | 1994-03-29 | Cirrus Logic, Inc. | System and method for producing a palette of many colors on a display screen having digitally-commanded pixels |
US5303055A (en) * | 1991-12-05 | 1994-04-12 | Texas Instruments Incorporated | Method and apparatus to improve a video signal |
US5483256A (en) * | 1993-01-05 | 1996-01-09 | Nec Corporation | LCD driving analog nonlinear operation circuit producing a composite drive voltage of function voltages of differential amplifiers |
EP0606993A2 (en) * | 1993-01-11 | 1994-07-20 | Canon Kabushiki Kaisha | Colour gamut clipping |
US5546101A (en) * | 1993-03-02 | 1996-08-13 | Fujitsu General Limited | Color display unit with plasma display panel |
EP0708433A2 (en) * | 1994-10-20 | 1996-04-24 | Canon Kabushiki Kaisha | Display control apparatus and method |
US5610666A (en) * | 1994-12-19 | 1997-03-11 | Nec Corporation | Gamma correcting circuit |
EP0810778A2 (en) * | 1996-05-31 | 1997-12-03 | SANYO ELECTRIC Co., Ltd. | Digital still camera with a gamma correction circuit |
EP0831643A2 (en) * | 1996-09-18 | 1998-03-25 | Matsushita Electric Industrial Co., Ltd. | Plasma display panel and method of controlling brightness of the same |
EP0947975A1 (en) * | 1998-04-02 | 1999-10-06 | Hitachi, Ltd. | Gamma correction circuit |
Also Published As
Publication number | Publication date |
---|---|
AU739565B2 (en) | 2001-10-18 |
KR20010024672A (en) | 2001-03-26 |
AU6003199A (en) | 2000-04-26 |
EP1046307A1 (en) | 2000-10-25 |
TW454415B (en) | 2001-09-11 |
CN1277785A (en) | 2000-12-20 |
US6340996B1 (en) | 2002-01-22 |
KR100342964B1 (en) | 2002-07-05 |
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