WO2007122825A1 - 表示パネル駆動装置、表示パネルの駆動方法、表示装置、テレビジョン受像機 - Google Patents
表示パネル駆動装置、表示パネルの駆動方法、表示装置、テレビジョン受像機 Download PDFInfo
- Publication number
- WO2007122825A1 WO2007122825A1 PCT/JP2007/050393 JP2007050393W WO2007122825A1 WO 2007122825 A1 WO2007122825 A1 WO 2007122825A1 JP 2007050393 W JP2007050393 W JP 2007050393W WO 2007122825 A1 WO2007122825 A1 WO 2007122825A1
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- Prior art keywords
- gradation
- display panel
- frame
- gradations
- subframe
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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
- G09G3/34—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
- G09G3/3648—Control of matrices with row and column drivers using an active matrix
-
- 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
- G09G3/2007—Display of intermediate tones
- G09G3/2018—Display of intermediate tones by time modulation using two or more time intervals
- G09G3/2022—Display of intermediate tones by time modulation using two or more time intervals using sub-frames
-
- 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
- G09G2320/0252—Improving the response speed
-
- 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
- G09G2320/0261—Improving the quality of display appearance in the context of movement of objects on the screen or movement of the observer relative to the screen
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2340/00—Aspects of display data processing
- G09G2340/16—Determination of a pixel data signal depending on the signal applied in the previous frame
Definitions
- Display panel drive device display panel drive method, display device, and television receiver
- the present invention relates to a method for driving a display panel in consideration of gradation transition.
- An overshoot (OS) drive can be cited as a method for driving a display panel in consideration of gradation transitions.
- the conventional OS drive uses an OS table (LUT) as shown in Fig. 24.
- the input gradation of the frame immediately before the current frame is 0 gradation
- the input gradation of the current frame (hereinafter referred to as the subsequent frame) is 224 gradations ( If the target gradation is), 239 OS gradations are output in the subsequent frame (see Fig. 14).
- a response waveform (change in transmittance) as shown in FIG. 15 can be obtained on the display panel side.
- OTn in the graph indicates the transmittance corresponding to n gradations.
- the display changes from 224 gradations to 32 gradations in one frame, and in the area Y adjacent to the area, from 128 gradations to 32 gradations in one frame. Even when the display is changed, it is visually recognized as a rough image edge (moving image edge) in the unnatural transient state moving image as shown in FIG.
- Patent Document 1 in order to increase the response speed of the liquid crystal display device, three consecutive frames are defined as (n-2) frame to n-th frame, and (n-2) frame gradation and A method of correcting the gradation of the middle (n ⁇ l) frame based on the gradation of n frames is disclosed. That is, as shown in FIG. 25, if the input gradations of (n-2) frame to n frame are black gradation, black gradation, and white gradation in order, (n-1) frame is black gradation. The tone is corrected to a slightly raised tone, and by giving the maximum tone in n frames, the response of the n frames is accelerated and the white tone display is enhanced.
- Patent Document 1 Japanese Published Patent Publication “Japanese Patent Laid-Open No. 2004-310113 (Publication Date: January 4, 2004)”
- the present invention has been made in view of the above problems, and an object of the present invention is to provide a display panel driving device capable of improving the moving image display quality of the display panel.
- the display panel driving apparatus generates gradations corresponding to the first to n-th subframes obtained by dividing one frame, and displays based on the gradations!
- a display panel drive device that drives a panel the gradation of the previous frame is Tf, and the rear frame
- the gray level generated corresponding to the first subframe of the subsequent frame corresponds to Tl and any one of the second to ⁇ subframes of the subsequent frame
- T1 and ⁇ 2 satisfy Tl ⁇ Tf, T2 ⁇ Tr, and Tl-Tf ⁇ T2-Tl.
- the above configuration forms an intermediate state in the first subframe that is not much different from the previous frame end state, and this intermediate state force also reaches the end state of the rear frame.
- the response waveform within one frame on the display panel side can be aligned to some extent regardless of the tone transition (combination of Tf and Tr) of the previous and subsequent frames, reducing the roughness of the video edges. can do.
- the moving image display quality in the display panel can be improved.
- the above T2 may be generated as a gradation corresponding to the second subframe.
- Tl—Tf (Tr-Tf) X O. 1 is satisfied.
- the state at the end of the first subframe (intermediate state) is almost the same as the end state of the previous frame.
- the response speed in the second subframe can be increased while maintaining the same. As a result, the response waveforms within one frame are aligned, and the roughness of the moving image edge can be further reduced.
- the display panel driving device of the present invention includes the first to nth obtained by dividing one frame.
- a display panel driving device that generates gradations corresponding to each subframe and drives the display panel using the gradations, wherein the gradation of the previous frame is Tf and the gradation of the rear frame is Tr
- the gradation generated corresponding to the first subframe of the subsequent frame is T1
- the gradation generated corresponding to any one of the second to nth subframes of the subsequent frame T1 and T2 satisfy Tl ⁇ Tf, T2 ⁇ Tr, and Tf—Tl ⁇ T1— ⁇ 2, where T2 is T2.
- the above configuration forms an intermediate state in the first subframe that is not much different from the previous frame end state, and this intermediate state force also reaches the end state of the rear frame.
- This makes it possible to align the response waveforms within one frame on the display panel side, regardless of the tone transition (combination of Tf and Tr) in the previous and subsequent frames, and reduce the roughness of the video edges. it can. Thereby, the moving image display quality in the display panel can be improved.
- T2 may be generated as a gradation corresponding to the second subframe.
- Tf-Tl ⁇ (Tf Tr) X O. 1 is also satisfied.
- the gradient for tilt given in the first subframe less than 10% of the gradation transition amount
- the state at the end of the first subframe is almost the same as the end state of the previous frame.
- the response speed in the second subframe can be increased while maintaining the same. As a result, the response waveforms within one frame are aligned, and the roughness of the moving image edge can be further reduced.
- the display panel may be a VA mode liquid crystal panel.
- gradations corresponding to the first to n-th subframes obtained by dividing one frame are generated, and the display panel is displayed using the gradations.
- This is a display panel drive method that drives the display frame, and is generated corresponding to the first subframe of the subsequent frame in the rise response where the gradation of the previous frame is Tf and the gradation of the subsequent frame is Tr.
- T1 and T2 are Tl ⁇ Tf and T2 ⁇ Tr And Tl-Tf ⁇ T2-Tl.
- the display panel driving method of the present invention generates gradations corresponding to each of the first to nth subframes obtained by dividing one frame, and uses the gradations to display the display panel.
- a display panel drive method for driving the display frame which is generated corresponding to the first subframe of the subsequent frame in the decay response in which the gradation of the previous frame is Tf and the gradation of the subsequent frame is Tr T1 and T2 are 0 ⁇ Tf, T2 ⁇ , where T1 is the gradation to be generated and T2 is the gradation generated corresponding to one of the 2nd to nth subframes of the subsequent frame. Tr and Tf Tl ⁇ T1 ⁇ 2 are satisfied!
- a display device for example, a liquid crystal display device of the present invention includes a display panel and the display panel driving device.
- a television receiver of the present invention is characterized by including the display device and a tuner unit for receiving a television broadcast.
- the display panel driving device of the present invention forms an intermediate state in the first subframe that is not significantly different from the previous frame end state, and from this intermediate state to the end state of the rear frame. It is what makes it reach.
- the response waveforms within one frame on the display panel can be aligned to some extent regardless of the gradation transition (combination of Tf and Tr) in the previous and subsequent frames, and the roughness of the moving image edge can be reduced. .
- the moving image display quality in the display panel can be improved.
- FIG. 1 is a graph showing the gradation of each subframe when a rise response of 0 ⁇ 224 gradations is performed in the present embodiment.
- FIG. 2 is a graph showing a response waveform (transmission change) on the liquid crystal panel side when a rise response of 0 ⁇ 224 gradations is performed in the present embodiment.
- FIG. 3 is a graph showing the gradation of each subframe when a rise response of 64 ⁇ 224 gradations is performed in the present embodiment.
- FIG. 4 is a graph showing a response waveform (transmission change) on the liquid crystal panel side when a rise response of 64 ⁇ 224 gradations is performed in the present embodiment.
- FIG. 5 is a block diagram showing a configuration of a liquid crystal display device according to the present embodiment.
- FIG. 6 is a table showing a first subframe data LUT according to the present embodiment.
- FIG. 7 is a table showing a second LUT for subframe data according to the present embodiment.
- FIG. 8 is a schematic diagram for explaining the effect of this embodiment (reducing the roughness of the moving image edge during the rise response).
- FIG. 9 is a graph showing the gradation of each subframe when a decay response of 128 ⁇ 32 gradations is performed in the present embodiment.
- FIG. 10 is a graph showing a response waveform (transmission change) on the liquid crystal panel side when a decay response of 128 ⁇ 32 gradations is performed in the present embodiment.
- FIG. 11 is a graph showing the gradation of each subframe when a decay response of 224 ⁇ 32 gradations is performed in the present embodiment.
- FIG. 12 is a graph showing a response waveform (transmission change) on the liquid crystal panel side when a decay response of 224 ⁇ 32 gradations is performed in the present embodiment.
- FIG. 13 is a schematic diagram for explaining the effect of this embodiment (reducing the roughness of the moving image edge during decay response).
- ⁇ 14 This is a graph showing the output gradation when performing a rise response from 0 to 224 gradations in the conventional OS drive.
- FIG. 15 is a graph showing a response waveform (transmission change) on the liquid crystal panel side when a rise response from 0 to 224 gradations is performed in a conventional OS drive.
- FIG. 17 is a graph showing a response waveform (transmission change) on the liquid crystal panel side when a rise response of 64 ⁇ 224 gradations is performed in a conventional OS drive.
- FIG. 20 is a graph showing a response waveform (transmission change) on the liquid crystal panel side when a decay response of 224 ⁇ 0 gradation is performed in the conventional OS drive.
- FIG. 22 is a graph showing a response waveform (transmission change) on the liquid crystal panel side when a 224 ⁇ 64 gradation decay response is performed in a conventional OS drive.
- FIG. 23 is a schematic diagram for explaining the roughness of a moving image edge (during decay response), which is a conventional problem.
- FIG. 24 is a table showing LUTs used for conventional OS drive.
- FIG. 25 is a graph showing a response waveform (transmission change) on the liquid crystal panel side in a conventional OS drive.
- FIG. 26 is a block diagram showing a configuration of a television receiver according to the present embodiment. Explanation of symbols
- FIG. 5 is a block diagram showing the configuration of the present liquid crystal display device.
- the liquid crystal display device 20 includes a VA mode liquid crystal panel 10 and a liquid crystal panel driving device (not shown) including a signal processing unit 9 and a source driver 3.
- the liquid crystal panel 10 and the source driver 3 may be integrated.
- the gamma of the LCD panel 10 is assumed to be 2.2.
- the signal processing unit 9 includes a memory (storage unit) 6, a subframe data generation unit 22, a subframe data selection unit 25, and a field counter unit 35.
- the memory 6 includes a first subframe data LUT 18, a second subframe data LUT 19, a previous frame memory 30, and a rear frame memory 40.
- Frame data (input gradation) DF is input to the signal processing unit 9 at 60 [Hz].
- the previous frame memory 30 stores the frame data DF (n ⁇ l) of the previous frame for one frame
- the rear frame memory 40 stores the frame data DFn force S i frames of the subsequent frame (current frame). Stored.
- the sub-frame data generation unit 22 reads the frame data DF (n-1) of the previous frame and the frame data DFn of the subsequent frame at double speed (120Hz) from each frame memory (30 ⁇ 40). Then, the first subframe data DSFnl is generated with reference to the first subframe data LUT 18, and the second subframe data DSFn2 is generated with reference to the second subframe data LUT19.
- the first sub-frame data DSFnl and the second sub-frame data DSFn2 are input to the sub-frame data selection unit 25.
- the data DSFnl 'DSFn2 are replaced at 120Hz.
- the field counter unit 35 watches the output from the post-frame memory 30 to determine whether it is the timing of the first subframe or the timing of the second subframe, and the determination result is sent to the subframe data selection unit 25. Output to.
- the subframe data selection unit 25 Based on the determination result of the field counter unit 35, the subframe data selection unit 25 outputs the first subframe data DSFnl to the source driver 3 at the start timing of the first subframe, and starts the second subframe.
- the second subframe data DSFn2 is output to source driver 3 at the timing.
- the source driver 3 converts each subframe data (DSFnl, DSFn2) into an analog potential signal, and drives each source line (data signal line) of the liquid crystal panel 10 by this potential signal.
- FIG. 6 shows an example of the first subframe data LUT 18
- FIG. 7 shows an example of the second subframe data LUT19.
- the first subframe data LUT 18 includes frame data DF (n-1) (input gradation Tf) of the previous frame and frame data DFn (input gradation Tr) of the subsequent frame.
- the first subframe data DSFnl (generation gradation T1) corresponding to the combination is written.
- the second subframe data LUT 19 includes the frame data DF (n ⁇ l) (input gradation Tf) of the previous frame and the frame data DFn (input gradation) of the subsequent frame.
- Second sub-frame data DSFn2 (generated gradation T2) corresponding to the combination with (Tr) is written. For combinations other than those listed in each table, for example, linear interpolation is used.
- Tl Tr Tr rise response
- Tl—Tf ⁇ (Tr -Tf) X O. 1 is satisfied.
- Tf is in the low gradation (0 to 64 gradation) region
- T1 increases as Tr increases
- Tf increases to the intermediate gradation or high gradation (64 gradation to 255 steps).
- Tl Tf regardless of Tr.
- the input gradation Tf of the previous frame is 0 gradation and the input gradation Tr of the subsequent frame is 224 gradations
- 7 gradations are generated as the gradations of the first subframe
- 255 gradations are generated as frame gradations.
- the input gradation Tf of the previous frame is 64 gradations and the input gradation Tr of the rear frame is 224 gradations
- 68 gradations are generated as the gradations of the first subframe
- 248 gradations are generated as gradations.
- the gradation of the rear frame is lower than the previous frame, and the decay response (T For f> Tr), Tl ⁇ Tf, T2 ⁇ Tr, and Tf—T1 ⁇ T1—T2, and Tf—Tl ⁇ (Tf-Tr) XO.1 are satisfied.
- the input gradation of the previous frame is 224 gradations and the input gradation of the subsequent frame is 32 gradations
- 222 gradations are generated as the gradations of the first subframe
- 0 gradation is generated as the gradation.
- 128 gradations are generated as the gradations of the first subframe and the gradations of the second subframe are Four gradations are generated.
- the gradation of the subsequent frame is generated as the gradation of the first subframe and the gradation of the second subframe.
- the signal processing unit according to the present embodiment includes the first and second subframe data LUTs, the moving image display quality of the liquid crystal panel can be improved as follows.
- region X a display that changes from 64 gradations to 224 gradations in one frame is displayed, and in region Y adjacent to region X, 0 gradations in one frame are displayed.
- ⁇ In the case of display that changes to 224 gradations, in area X, 68 gradations are output as the gradation of the first subframe and 248 gradations are output as the gradation of the second subframe (see Fig. 3).
- area Y 7 gradations are output as the gradation of the first subframe and 255 gradations are output as the gradation of the second subframe (see Fig. 1).
- the response waveform (transmission change) on the liquid crystal panel side is as shown in FIG. 4 in the region X and as shown in FIG. 2 in the region Y. Both waveforms can be made uniform.
- OTn indicates the transmittance [%] corresponding to n gradations.
- the first subframe gives 7 gradations (tilting gradation)
- the second subframe gives 255 gradations (overshoot gradation) higher than the gradation of the subsequent frame.
- the response waveform (transmission change) on the liquid crystal panel side is as shown in FIG. 10 in the region X and as shown in FIG. 12 in the region Y. Both waveforms can be made uniform.
- the first subframe gives 222 gradations (tilting gradation)
- the second subframe gives 0 gradations (overshoot gradations) less than the gradation of the subsequent frame.
- the response speed of 2 subframes is increased. That is, according to the present embodiment, as shown in FIG. 13, an intermediate state is formed at the intermediate point of one frame in the X region and the Y region, which is hardly different from the previous frame end state. It is possible to reach the end state of the later frame at once (at high speed).
- each unit (subframe data generation unit 22, subframe data selection unit 25, etc.) of signal processing unit 9 in FIG. 5 can be realized by, for example, an ASIC or CPU.
- the television receiver (liquid crystal television) of the present embodiment includes the present liquid crystal display device 20 and a tuner unit 70 that receives a television broadcast and outputs a video signal. Prepare. That is, in the television receiver 90, the video signal output from the tuner unit 70 is displayed.
- the liquid crystal display device 20 displays an image (image) based on the number.
- the liquid crystal panel driving device of the present invention and the display device including the same are suitable for a liquid crystal television, for example.
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- Crystallography & Structural Chemistry (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
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Abstract
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Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
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CN2007800100934A CN101405788B (zh) | 2006-04-14 | 2007-01-15 | 显示面板驱动装置、显示面板的驱动方法、显示装置、电视接收机 |
JP2008511974A JP4824087B2 (ja) | 2006-04-14 | 2007-01-15 | 表示パネル駆動装置、表示パネルの駆動方法、表示装置、テレビジョン受像機 |
US12/224,856 US8212756B2 (en) | 2006-04-14 | 2007-01-15 | Display panel driving apparatus, display panel driving method, display apparatus, and television receiver |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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JP2006112782 | 2006-04-14 | ||
JP2006-112782 | 2006-04-14 |
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WO2007122825A1 true WO2007122825A1 (ja) | 2007-11-01 |
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PCT/JP2007/050393 WO2007122825A1 (ja) | 2006-04-14 | 2007-01-15 | 表示パネル駆動装置、表示パネルの駆動方法、表示装置、テレビジョン受像機 |
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US (1) | US8212756B2 (ja) |
JP (1) | JP4824087B2 (ja) |
CN (1) | CN101405788B (ja) |
WO (1) | WO2007122825A1 (ja) |
Cited By (3)
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JP2010276987A (ja) * | 2009-05-29 | 2010-12-09 | Tpo Displays Corp | 表示制御装置 |
WO2011142152A1 (ja) * | 2010-05-14 | 2011-11-17 | シャープ株式会社 | 立体映像表示方法および立体映像表示装置 |
WO2014208383A1 (ja) * | 2013-06-28 | 2014-12-31 | 堺ディスプレイプロダクト株式会社 | 表示装置、及び表示装置の制御方法 |
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US20120242650A1 (en) * | 2011-03-24 | 2012-09-27 | Yu-Yeh Chen | 3d glass, 3d image processing method, computer readable storage media can perform the 3d image processing method |
CN113936613B (zh) * | 2020-06-29 | 2023-07-07 | 京东方科技集团股份有限公司 | 显示面板的驱动方法及驱动装置、显示设备和存储介质 |
KR20240009578A (ko) * | 2022-07-13 | 2024-01-23 | 삼성디스플레이 주식회사 | 표시 장치 및 그의 구동방법 |
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- 2007-01-15 WO PCT/JP2007/050393 patent/WO2007122825A1/ja active Application Filing
- 2007-01-15 JP JP2008511974A patent/JP4824087B2/ja not_active Expired - Fee Related
- 2007-01-15 CN CN2007800100934A patent/CN101405788B/zh not_active Expired - Fee Related
- 2007-01-15 US US12/224,856 patent/US8212756B2/en not_active Expired - Fee Related
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JP2003241721A (ja) * | 2002-02-20 | 2003-08-29 | Fujitsu Display Technologies Corp | 液晶パネルの表示制御装置および液晶表示装置 |
JP2004310113A (ja) * | 2003-04-07 | 2004-11-04 | Samsung Electronics Co Ltd | 表示装置、駆動装置及び駆動方法 |
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JP2010276987A (ja) * | 2009-05-29 | 2010-12-09 | Tpo Displays Corp | 表示制御装置 |
US8421809B2 (en) | 2009-05-29 | 2013-04-16 | Chimei Innolux Corporation | Display control device |
WO2011142152A1 (ja) * | 2010-05-14 | 2011-11-17 | シャープ株式会社 | 立体映像表示方法および立体映像表示装置 |
CN102845070A (zh) * | 2010-05-14 | 2012-12-26 | 夏普株式会社 | 立体视频显示方法和立体视频显示装置 |
JP5405660B2 (ja) * | 2010-05-14 | 2014-02-05 | シャープ株式会社 | 立体映像表示方法および立体映像表示装置 |
RU2517696C1 (ru) * | 2010-05-14 | 2014-05-27 | Шарп Кабусики Кайся | Способ отображения стереоскопического видеоизображения и устройство отображения стереоскопического видеоизображения |
CN102845070B (zh) * | 2010-05-14 | 2015-01-14 | 夏普株式会社 | 立体视频显示方法和立体视频显示装置 |
WO2014208383A1 (ja) * | 2013-06-28 | 2014-12-31 | 堺ディスプレイプロダクト株式会社 | 表示装置、及び表示装置の制御方法 |
JPWO2014208383A1 (ja) * | 2013-06-28 | 2017-02-23 | 堺ディスプレイプロダクト株式会社 | 表示装置、及び表示装置の制御方法 |
Also Published As
Publication number | Publication date |
---|---|
JP4824087B2 (ja) | 2011-11-24 |
US20090201238A1 (en) | 2009-08-13 |
CN101405788A (zh) | 2009-04-08 |
JPWO2007122825A1 (ja) | 2009-09-03 |
US8212756B2 (en) | 2012-07-03 |
CN101405788B (zh) | 2011-04-13 |
US20120119981A2 (en) | 2012-05-17 |
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