JP2009058656A - 画像表示装置 - Google Patents
画像表示装置 Download PDFInfo
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- JP2009058656A JP2009058656A JP2007224515A JP2007224515A JP2009058656A JP 2009058656 A JP2009058656 A JP 2009058656A JP 2007224515 A JP2007224515 A JP 2007224515A JP 2007224515 A JP2007224515 A JP 2007224515A JP 2009058656 A JP2009058656 A JP 2009058656A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/44—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream, rendering scenes according to MPEG-4 scene graphs
- H04N21/4402—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream, rendering scenes according to MPEG-4 scene graphs involving reformatting operations of video signals for household redistribution, storage or real-time display
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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
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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
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/005—Projectors using an electronic spatial light modulator but not peculiar thereto
-
- 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
- G09G3/001—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes using specific devices not provided for in groups G09G3/02 - G09G3/36, e.g. using an intermediate record carrier such as a film slide; Projection systems; Display of non-alphanumerical information, solely or in combination with alphanumerical information, e.g. digital display on projected diapositive as background
- G09G3/002—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes using specific devices not provided for in groups G09G3/02 - G09G3/36, e.g. using an intermediate record carrier such as a film slide; Projection systems; Display of non-alphanumerical information, solely or in combination with alphanumerical information, e.g. digital display on projected diapositive as background to project the image of a two-dimensional display, such as an array of light emitting or modulating elements or a CRT
-
- 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
- G09G3/3406—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
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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
- G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
- G09G5/02—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators characterised by the way in which colour is displayed
- G09G5/06—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators characterised by the way in which colour is displayed using colour palettes, e.g. look-up tables
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/44—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream, rendering scenes according to MPEG-4 scene graphs
- H04N21/44008—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream, rendering scenes according to MPEG-4 scene graphs involving operations for analysing video streams, e.g. detecting features or characteristics in the video stream
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
- H04N5/57—Control of contrast or brightness
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/12—Picture reproducers
- H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
- H04N9/3141—Constructional details thereof
- H04N9/315—Modulator illumination systems
- H04N9/3155—Modulator illumination systems for controlling the light 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
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0238—Improving the black level
-
- 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
- G09G2320/0626—Adjustment of display parameters for control of overall brightness
- G09G2320/0646—Modulation of illumination source brightness and image signal correlated to each other
-
- 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
- G09G2320/0673—Adjustment of display parameters for control of gamma adjustment, e.g. selecting another gamma curve
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2360/00—Aspects of the architecture of display systems
- G09G2360/16—Calculation or use of calculated indices related to luminance levels in display data
Abstract
【解決手段】入力映像信号Dinにおける輝度情報に基づいて、光源11からの光の光量が減少するように、可変絞り16によって光量調整を行う。その光量調整量に応じて入力映像信号Dinの輝度レベルが高くなるように、映像信号処理部23によって画像補正を行う。また、液晶素子14R,14G,14Bにより変調された光の輝度状態に対応する最終表示輝度状態が所定の輝度状態よりも明るい状態のときには、特徴情報処理部22によって、光量制御信号S2および映像制御信号S1のうちの少なくとも一方を、設定された調整方向または補正方向とは逆方向に再設定する。
【選択図】図1
Description
Claims (12)
- 光源と、
前記光源からの光を映像信号に基づいて変調する空間光変調素子と、
前記映像信号における輝度情報に基づいて、前記光源からの光の光量が減少するように調整を行う光量調整手段と、
前記光量調整手段による光量調整量に応じて前記映像信号の輝度レベルが高くなるように補正を行い、補正後の映像信号を前記空間光変調素子へ供給する画像補正手段と、
前記空間変調素子により変調された光の輝度状態に対応する最終表示輝度状態が所定の輝度状態よりも明るい状態のときに、前記光量調整手段による調整後の光量および前記画像補正手段による補正後の映像信号の輝度レベルのうちの少なくとも一方を、前記光量調整手段による調整方向または前記画像補正手段による補正方向とは逆方向に再設定する再設定手段と
を備えたことを特徴とする画像表示装置。 - 前記再設定手段は、前記調整後の光量が所定の光量閾値よりも大きい一定の範囲内となるときに、この調整後の光量が前記光量調整手段により設定される値よりも大きくなるように、調整後の光量を再設定する
ことを特徴とする請求項1に記載の画像表示装置。 - 前記再設定手段は、表示画面内の全画素のうち、前記補正後の映像信号の輝度レベルが所定の輝度閾値よりも大きくなる画素の割合が、所定の画素閾値よりも大きくなるときに、前記補正後の映像信号の輝度レベルが前記画像補正手段により設定される値よりも大きくなるように、補正後の映像信号の輝度レベルを再設定する
ことを特徴とする請求項1に記載の画像表示装置。 - 前記再設定手段は、前記最終表示輝度状態が前記所定の輝度状態よりも明るい状態のとき、前記調整後の光量および前記補正後の映像信号の輝度レベルをそれぞれ、調整前の光量および補正前の映像信号の輝度レベルに再設定する
ことを特徴とする請求項1に記載の画像表示装置。 - 前記所定の輝度状態が、調整可能となっている
ことを特徴とする請求項1に記載の画像表示装置。 - 前記所定の輝度状態が、前記映像信号に基づく映像の絵柄に応じて、調整可能となっている
ことを特徴とする請求項5に記載の画像表示装置。 - 前記再設定手段は、再設定した後の前記調整後の光量または前記補正後の映像信号の輝度レベルをそれぞれの目標値とすることにより、前記光量調整手段による前記光源からの光の光量調整または前記画像補正手段による前記映像信号の輝度レベルの補正を、フレーム単位で漸近的に行わせる
ことを特徴とする請求項1に記載の画像表示装置。 - 前記映像信号における輝度情報が、表示領域における輝度ヒストグラム分布である
ことを特徴とする請求項1に記載の画像表示装置。 - 前記空間変調素子により変調された光をスクリーンに投射する投射手段を備え、
前記光量調整手段が、前記光源からの光を絞ることにより光量調整を行う可変絞りである
ことを特徴とする請求項1に記載の画像表示装置。 - 前記空間変調素子が液晶素子であり、液晶プロジェクタとして構成されている
ことを特徴とする請求項9に記載の画像表示装置。 - 前記空間光変調素子が液晶素子であると共に前記光源が前記液晶素子のバックライト光源であり、液晶表示装置として構成されている
ことを特徴とする請求項1に記載の画像表示装置。 - 前記バックライト光源が発光ダイオード(LED)を含んで構成され、
前記光量調整手段は、前記映像信号における輝度情報に基づいて前記発光ダイオードへの供給電圧を変化させることにより、前記バックライト光源からの光の光量を調整する
ことを特徴とする請求項11に記載の画像表示装置。
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2007224515A JP4552985B2 (ja) | 2007-08-30 | 2007-08-30 | 画像表示装置 |
US12/229,320 US8228351B2 (en) | 2007-08-30 | 2008-08-21 | Image display apparatus featuring improved contrast |
KR1020080085090A KR20090023275A (ko) | 2007-08-30 | 2008-08-29 | 화상 표시 장치 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2007224515A JP4552985B2 (ja) | 2007-08-30 | 2007-08-30 | 画像表示装置 |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2009058656A true JP2009058656A (ja) | 2009-03-19 |
JP4552985B2 JP4552985B2 (ja) | 2010-09-29 |
Family
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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JP2007224515A Expired - Fee Related JP4552985B2 (ja) | 2007-08-30 | 2007-08-30 | 画像表示装置 |
Country Status (3)
Country | Link |
---|---|
US (1) | US8228351B2 (ja) |
JP (1) | JP4552985B2 (ja) |
KR (1) | KR20090023275A (ja) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2012023195A1 (ja) * | 2010-08-19 | 2012-02-23 | Necディスプレイソリューションズ株式会社 | 投射型表示装置およびその制御方法 |
JP5884060B2 (ja) * | 2010-08-26 | 2016-03-15 | パナソニックIpマネジメント株式会社 | 映像表示制御装置 |
EP2811481B1 (en) * | 2012-02-03 | 2017-07-12 | Panasonic Intellectual Property Management Co., Ltd. | Video display control device |
US9483982B1 (en) * | 2015-05-05 | 2016-11-01 | Dreamscreen Llc | Apparatus and method for television backlignting |
KR102528532B1 (ko) * | 2018-08-23 | 2023-05-04 | 삼성전자주식회사 | 디스플레이 장치 및 그 휘도 제어 방법 |
Citations (11)
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JPH07129113A (ja) * | 1993-10-29 | 1995-05-19 | Sharp Corp | 表示輝度を調整する表示装置 |
JPH08106090A (ja) * | 1993-12-27 | 1996-04-23 | Toshiba Corp | 表示装置 |
JP2004311461A (ja) * | 2003-04-01 | 2004-11-04 | Hunet Inc | Ledの駆動電圧設定装置及びその方法 |
JP2006003586A (ja) * | 2004-06-17 | 2006-01-05 | Seiko Epson Corp | 映像表示装置および映像表示方法ならびにそのプログラム |
JP2006243687A (ja) * | 2005-02-03 | 2006-09-14 | Nikon Corp | 表示装置 |
JP2006267140A (ja) * | 2005-03-22 | 2006-10-05 | Hitachi Ltd | 映像処理装置および携帯端末装置 |
JP2006276677A (ja) * | 2005-03-30 | 2006-10-12 | Toshiba Corp | 表示装置と表示装置の駆動方法 |
JP2006284982A (ja) * | 2005-04-01 | 2006-10-19 | Seiko Epson Corp | 調光情報生成装置、その方法、そのプログラム、そのプログラムを記録した記録媒体、および画像表示装置 |
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JP2007179001A (ja) * | 2005-11-29 | 2007-07-12 | Sony Corp | 液晶表示装置組立体の駆動方法 |
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US7220006B2 (en) * | 2003-08-08 | 2007-05-22 | Allen Eddie E | Method and apparatus for increasing effective contrast ratio and brightness yields for digital light valve image projectors |
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JP2006235157A (ja) * | 2005-02-24 | 2006-09-07 | Seiko Epson Corp | 画像表示装置、画像表示方法、およびプログラム |
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2007
- 2007-08-30 JP JP2007224515A patent/JP4552985B2/ja not_active Expired - Fee Related
-
2008
- 2008-08-21 US US12/229,320 patent/US8228351B2/en not_active Expired - Fee Related
- 2008-08-29 KR KR1020080085090A patent/KR20090023275A/ko active IP Right Grant
Patent Citations (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH07129113A (ja) * | 1993-10-29 | 1995-05-19 | Sharp Corp | 表示輝度を調整する表示装置 |
JPH08106090A (ja) * | 1993-12-27 | 1996-04-23 | Toshiba Corp | 表示装置 |
JP2007164208A (ja) * | 2001-04-25 | 2007-06-28 | Matsushita Electric Ind Co Ltd | 映像表示装置 |
JP2004311461A (ja) * | 2003-04-01 | 2004-11-04 | Hunet Inc | Ledの駆動電圧設定装置及びその方法 |
JP2006003586A (ja) * | 2004-06-17 | 2006-01-05 | Seiko Epson Corp | 映像表示装置および映像表示方法ならびにそのプログラム |
JP2006243687A (ja) * | 2005-02-03 | 2006-09-14 | Nikon Corp | 表示装置 |
JP2006267140A (ja) * | 2005-03-22 | 2006-10-05 | Hitachi Ltd | 映像処理装置および携帯端末装置 |
JP2006276677A (ja) * | 2005-03-30 | 2006-10-12 | Toshiba Corp | 表示装置と表示装置の駆動方法 |
JP2006284982A (ja) * | 2005-04-01 | 2006-10-19 | Seiko Epson Corp | 調光情報生成装置、その方法、そのプログラム、そのプログラムを記録した記録媒体、および画像表示装置 |
WO2007029420A1 (ja) * | 2005-09-08 | 2007-03-15 | Sharp Kabushiki Kaisha | 画像表示装置 |
JP2007179001A (ja) * | 2005-11-29 | 2007-07-12 | Sony Corp | 液晶表示装置組立体の駆動方法 |
Also Published As
Publication number | Publication date |
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KR20090023275A (ko) | 2009-03-04 |
US8228351B2 (en) | 2012-07-24 |
US20090135208A1 (en) | 2009-05-28 |
JP4552985B2 (ja) | 2010-09-29 |
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