JP4594510B2 - Transmission type image display device and driving method of transmission type image display device - Google Patents

Transmission type image display device and driving method of transmission type image display device Download PDF

Info

Publication number
JP4594510B2
JP4594510B2 JP2000336453A JP2000336453A JP4594510B2 JP 4594510 B2 JP4594510 B2 JP 4594510B2 JP 2000336453 A JP2000336453 A JP 2000336453A JP 2000336453 A JP2000336453 A JP 2000336453A JP 4594510 B2 JP4594510 B2 JP 4594510B2
Authority
JP
Japan
Prior art keywords
color
light source
shutter
signal
unit
Prior art date
Legal status (The legal status 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 status listed.)
Active
Application number
JP2000336453A
Other languages
Japanese (ja)
Other versions
JP2002140038A (en
Inventor
和博 石口
盛毅 高橋
Original Assignee
三菱電機株式会社
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 三菱電機株式会社 filed Critical 三菱電機株式会社
Priority to JP2000336453A priority Critical patent/JP4594510B2/en
Publication of JP2002140038A publication Critical patent/JP2002140038A/en
Application granted granted Critical
Publication of JP4594510B2 publication Critical patent/JP4594510B2/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20Control 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
    • G09G3/34Control 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
    • G09G3/3406Control of illumination source
    • G09G3/3413Details of control of colour illumination sources
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00Control of display operating conditions
    • G09G2320/06Adjustment of display parameters
    • G09G2320/0626Adjustment of display parameters for control of overall brightness
    • G09G2320/0646Modulation of illumination source brightness and image signal correlated to each other
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00Control of display operating conditions
    • G09G2320/06Adjustment of display parameters
    • G09G2320/0666Adjustment of display parameters for control of colour parameters, e.g. colour temperature
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2360/00Aspects of the architecture of display systems
    • G09G2360/16Calculation or use of calculated indices related to luminance levels in display data

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a transmissive image display device that displays a color image by having a plurality of color filters for each display pixel.
[0002]
[Prior art]
As shown in FIG. 6, the transmissive image display device generally includes a light source 1, a shutter 2 for generating an image, and a shutter control unit 3 that controls the shutter 2. The shutter 2 can be opened and closed for each fine area corresponding to each pixel constituting the display image, and a display image is obtained by controlling the light transmittance in each pixel.
[0003]
In the case of a transmissive image display device that performs color display, as shown in FIG. 5, each pixel is further divided into sub-pixels corresponding to the three color filters 7 of RGB, and the shutter 2 uses each sub-pixel. Control light transmission. Since each sub-pixel and each pixel are made sufficiently fine, a mixed color of three colors of RGB displayed on each sub-pixel is observed by the user of the display device as a display color of the pixel.
[0004]
In a conventional transmissive image display device, color display is performed by combining the three color filters 7 and the shutter 2 with a single color light source 1. Therefore, the color reproduction range that can be displayed depends on the color filter characteristics and the light emission color of the light source. For example, the color reproduction range is limited to the inside of the region 100 in the chromaticity diagram of FIG. . Therefore, it has been difficult to obtain a display with high saturation in the conventional transmissive image display device.
[0005]
Although a method of providing a color conversion calculation unit 8 to convert an input image signal by calculation and displaying it as a color with higher saturation is also considered, an apparently viable color is considered. Since the reproduction range is constant in the region 100 in the chromaticity diagram of FIG. 4, color collapse due to saturation occurs on the high saturation side.
[0006]
[Problems to be solved by the invention]
In a conventional transmissive image display device having a color filter for each pixel, an image is displayed within the color reproduction range determined by the color of the light source and the color filter. In general, in a transmissive image display device such as a liquid crystal display device, the color reproduction range is narrower than that of a display device such as a CRT.
[0007]
In addition, the method of converting the input image signal by calculation to make the colors appear brilliantly has a drawback that the emphasized color is crushed due to saturation because the actual displayable color reproduction range is constant. there were.
[0008]
The present invention provides a method for dynamically brightening a specific color according to an input image and realizing a color reproduction range equivalent to that of a display device such as a CRT without discomfort when displaying a moving image.
[0009]
[Means for Solving the Problems]
Transmissive image display device of the present invention, sends a plurality of different light sources emission colors, and the light source control unit capable of controlling the respective light source independently a by computing the input image signal signal to the light source controller An image detection unit; a shutter unit having a color filter composed of a plurality of colors; and a shutter control unit for controlling the shutter unit, and the light transmittance of the shutter unit is set according to the input image signal. A transmission-type image display device that displays an image by controlling, wherein the image detection unit detects a color to be emphasized from the input image signal , and the light emission ratio of each light source is determined by the color to be emphasized. A signal for controlling the light emission ratio is input so as to be more vivid, and the input video signal is corrected so as to suppress a change in a color other than the color to be emphasized according to the change in the light emission ratio. Color correction Has a calculation unit, and controlling the light transmittance of the in accordance with the corrected input image signal the shutter unit.
[0010]
In addition, the correction of the input video signal in the color correction calculation unit is correction for suppressing a change in white chromaticity coordinates .
[0011]
Further, the light source control section, so as to suppress a change in white luminance by the correction of the input video signal in the color correction calculation unit, and controls the light emission amount of the entire light source.
[0012]
The transmission method of the transmissive image display device according to the present invention includes a plurality of light sources having different emission colors, a light source control unit that controls each of the light sources, and an image detection that calculates an input image signal and sends the signal to the light source control unit. And a shutter unit provided with a color filter composed of a plurality of colors, and a shutter control unit for controlling the shutter unit, and controls the light transmittance of the shutter unit in accordance with the input image signal. In the driving method of the transmissive image display device that performs the display, the image detection unit detects the color to be emphasized from the input image signal and the light emission ratio of each light source is the color to be enhanced. An operation for changing the input video signal so as to suppress a change in a color other than the color to be emphasized according to the change in the light emission ratio, and the corrected input image. Trust And having a an operation of controlling the light transmittance of the shutter unit in accordance with.
[0013]
Further, the correction of the input video signal is correction for suppressing a change in white chromaticity coordinates.
[0014]
The light source control unit further includes an operation of controlling a light emission amount of the entire light source so as to suppress a change in white luminance due to correction of the input video signal.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Embodiment 1
FIG. 1 is a block diagram of a transmissive image display device according to this embodiment. The transmissive image display apparatus according to the present embodiment includes a plurality of types of light sources 1a, 1b, 1c,... That have different emission colors, a light source control unit 4 that controls light emission of these light sources, and a color filter for each pixel. The shutter 2 and the shutter control unit 3 are provided, and the image detection unit 5 detects an input image. In the present embodiment, three types of light sources whose emission colors are R (red), G (green), and B (blue) are used. Further, the color filter having the RGB stripe configuration shown in FIG. 5 is used, and a matrix type TFT liquid crystal is used as a shutter.
[0016]
The input image signal is input to the shutter control unit 3, controls the shutter 2 to form a display image, and is input to the image detection unit 5. The image detection unit 5 detects the emphasized color of the input image signal for each frame. For example, for each coordinate {x, y} on the screen, the data of each color of the input image signal is {R x, y , G x, y , B x, y } over one frame period.
[Expression 1]
[0018]
Is calculated, it is possible to detect the most frequently used color on the screen of one frame by using these ratios. This detection result is sent to the light source control unit 4 to change the light emission ratios of the plurality of light sources 1a, 1b, and 1c having different colors to emphasize a specific color more vividly. The light emission ratio may be changed by changing the light emission amount of each light source or by changing the ratio of the light emission time of each light source per unit time.
[0019]
In the detection of the emphasized color by the image detection unit 5, not only a simple sum of data as in (Expression 1) but also a square sum or other image detection methods can be used. Further, such an operation may be performed over several frames to detect the emphasized color as an average of several frames.
[0020]
According to this method, for example, on a reddish screen, a display in which red is emphasized can be obtained by increasing the light emission ratio of the red light source. That is, the coordinate 101 in the conventional color reproduction range shown in FIG. 4 can be moved to a more vivid color with respect to a specific color direction on the chromaticity diagram, that is, to the coordinate 201.
[0021]
In the conventional color conversion technique by converting the input signal, the color reproduction range itself does not change and is limited to the inside of the region 100. Of course, the display color after conversion is also limited to this region 100. It was. In this embodiment, since the color reproduction range itself can be changed from the region 100 to the region 200, a display with higher saturation can be obtained. Also in this embodiment, the color reproduction range does not actually widen, only the color reproduction range moves. However, the movement of the color reproduction range is dynamic, that is, the direction and amount of movement of the color reproduction range are determined for each frame based on the input image signal. Perceived as widened.
[0022]
Embodiment 2
FIG. 2 shows a block diagram of a transmissive image display apparatus according to another embodiment of the present invention. The transmissive image display apparatus according to the present embodiment includes a plurality of types of light sources 1a, 1b, and 1c having different emission colors, a light source control unit 4 that controls light emission of each of these light sources, a shutter 2 that includes a color filter in each pixel, and The shutter control unit 3 includes an image detection unit 5 that detects an input image and a color correction calculation unit 6.
[0023]
As in the first embodiment, the image detection unit 5 analyzes the ratio of each color of RGB in the input image signal and sends the light emission ratio signal to the light source control unit 4 to change the light emission ratio of each light source 1a, 1b, 1c. To do. At the same time, the light emission ratio signal is also sent to the color correction calculation unit 6. The color correction calculation unit 6 performs color correction on the input image signal other than the emphasized color according to the light emission ratio of the light source determined by the image detection unit 5.
[0024]
In Embodiment 1, since the saturation of the emphasized color is increased by changing the light emission ratio of the light source, the chromaticity coordinates of the colors other than the emphasized color also change at the same time. In the present embodiment, the color correction calculation unit 6 can convert a signal input to the shutter control unit 3 to prevent a color change other than the emphasized color. Color conversion can be performed with high accuracy by using a look-up table using the light emission ratio of the light source and the input image signal as parameters for signal conversion in the color correction calculation unit 6. Alternatively, performing color correction by matrix calculation has the effect of reducing the number of components, although the accuracy is slightly reduced.
[0025]
For example, when the color at the coordinate 101 in FIG. 4 is further emphasized in red, the color reproduction range is moved from the region 100 to the region 200 by changing the light emission ratio of the light source, as in the first embodiment. By moving the coordinate 101 to the coordinate 201, a bright red color can be displayed. However, in this state, the white chromaticity coordinate is also moved from the coordinate 102 to the coordinate 202 and displayed as reddish white.
[0026]
Therefore, in the present embodiment, the color correction calculation unit 6 performs color correction by signal conversion for display colors other than the emphasized color based on the light emission ratio of the changed light source. For example, when the emission ratio of the red light source is increased, signal conversion is performed to reduce the R (red) component of the image signal. Further, instead of reducing the R (red) component, the G (green) and B (blue) components may be increased. Increasing the G (green) and B (blue) components while reducing the R (red) component is preferable because the overall luminance does not change.
[0027]
As described above, in the transmissive image display device according to the present embodiment, the color correction by signal conversion is performed on the display colors other than the emphasized color, so that the white chromaticity coordinate moves to the coordinate 202. Instead, it is displayed at the position of the original coordinate 102. Therefore, it is possible to display the emphasized color more vividly, suppress color changes other than the emphasized color, and obtain a natural display without a sense of incongruity.
[0028]
Embodiment 3
FIG. 3 is a block diagram of a transmissive image display device according to another embodiment of the present invention. The transmissive image display apparatus according to the present embodiment includes a plurality of types of light sources 1a, 1b, and 1c having different emission colors, a light source control unit 4 that controls light emission of each of these light sources, a shutter 2 that includes a color filter in each pixel, and The shutter control unit 3 includes an image detection unit 5 that detects an input image and a color correction calculation unit 6.
[0029]
As in the second embodiment, the image detection unit 5 analyzes the ratio of each color of RGB in the input image signal and sends the light emission ratio signal to the light source control unit 4 to change the light emission ratio of each light source 1a, 1b, 1c. To do. At the same time, according to the light emission ratio of each light source determined by the image detection unit 5, the color correction calculation unit 6 performs color correction for the input image signal other than the emphasized color. Further, in the present embodiment, the change in white luminance is suppressed by sending the white luminance change information accompanying the color correction from the color correction calculation unit 6 to the light source control unit 4 and changing the light emission amount of the entire light source.
[0030]
When color correction is performed by converting the input image signal, the transmittance of any of RGB must be reduced at the maximum gradation of white. Accordingly, the displayed white color after color conversion becomes dark.
[0031]
In order to prevent this, a signal corresponding to a change in white luminance is sent from the color correction calculation unit 6 to the light source control unit 4 so that the white luminance is not changed. For example, the image detection unit 5 designates a ratio of L R : L G : L B (L R , L G , and L B are emission luminances of R, G, and B light sources, respectively), and a color correction calculation unit You may specify a value of L R + L G + L B from 6.
[0032]
For example, when red is emphasized more vividly, an operation is performed so that white is color corrected to the cyan side and returned to the original chromaticity coordinate position so that white does not move in the red direction. When white is corrected to the cyan side, the white image signal that is actually input to the shutter control unit 3 has a reduced red transmittance, and the luminance is lowered as it is. In the present embodiment, a signal corresponding to a change in white luminance is sent from the color correction calculation unit 6 to the light source control unit 3, and the light emission amount of the entire light source increases, so that display can be performed with the same luminance as the original white. it can. Further, not only white but also almost all colors other than the emphasized color, basically the same luminance reduction occurs because the red transmittance is reduced by the shutter portion by color correction. Therefore, the luminance correction effect similar to that of white can be obtained by the light source control for white luminance correction according to the present embodiment. Further, since the color correction is not performed for the emphasized color, the luminance increases as the light emission amount of the light source increases, and there is an effect of further enhancing the color.
[0033]
【The invention's effect】
According to the present invention, it is possible to provide a transmissive image display device having a wide color reproduction range and vivid display.
[Brief description of the drawings]
FIG. 1 is a block diagram illustrating a transmissive image display device according to a first embodiment of the present invention.
FIG. 2 is a block diagram illustrating a transmissive image display device according to a second embodiment of the present invention.
FIG. 3 is a block diagram illustrating a transmissive image display device according to a third embodiment of the present invention.
FIG. 4 is a CIE x, y chromaticity diagram for explaining the effect of the present invention.
FIG. 5 is a diagram illustrating a color filter provided in a shutter.
FIG. 6 is a block diagram illustrating a conventional transmissive image display device.
[Explanation of symbols]
1a, 1b, 1c Light source
2 Shutter
3 Shutter controller
4 Light source controller
5 Image detector
6 color correction calculator
7 color filters
8 color conversion operation part
100 Color reproduction range by conventional technology
200 Color reproduction range according to the present invention

Claims (6)

  1. A plurality of different light sources emission colors, and the light source control unit capable of controlling the respective light source independently, and an image detecting unit to send the by computing the input image signal signal to the light source control unit, comprising a plurality of color transmission performed a shutter unit having a color filter, and a shutter control unit for controlling the shutter, the display of the image by controlling the light transmittance of the shutter unit in accordance with the input image signal Type image display device,
    The image detection unit detects a color to be enhanced from the input image signal , and changes a light emission ratio of each light source so that the color to be enhanced becomes more vivid .
    A signal for controlling the light emission ratio is input, and a color correction calculation unit that corrects the input video signal so as to suppress a change in color other than the color to be emphasized according to the change in the light emission ratio,
    A transmissive image display device, wherein the light transmittance of the shutter unit is controlled in accordance with the corrected input image signal .
  2. The transmissive image display device according to claim 1, wherein the correction of the input video signal in the color correction calculation unit is correction for suppressing a change in white chromaticity coordinates.
  3. The light source control section, so as to suppress the correction changes in the white brightness due to the input video signal in the color correction operation unit, according to claim 1 or 2, wherein the controlling the light emission amount of the entire light source Transmissive image display device.
  4. A plurality of light sources having different emission colors, a light source control unit that controls each of the light sources, an image detection unit that calculates an input image signal and sends the signal to the light source control unit, and a color filter composed of a plurality of colors A driving method of a transmissive image display apparatus that includes a shutter unit and a shutter control unit that controls the shutter unit, and controls the light transmittance of the shutter unit according to the input image signal to display an image. There,
      In the image detection unit, an operation of detecting a color to be emphasized from the input image signal;
      An operation for changing the light emission ratio of each light source so that the color to be emphasized becomes more vivid,
      An operation of correcting the input video signal so as to suppress a change in a color other than the color to be emphasized according to a change in the light emission ratio;
      An operation of controlling the light transmittance of the shutter unit in accordance with the corrected input image signal.
  5. The correction of the input video signal is a correction that suppresses a change in white chromaticity coordinates.
    The method of driving a transmissive image display device according to claim 4.
  6. The transmissive image display device according to claim 4, further comprising an operation of controlling a light emission amount of the entire light source so as to suppress a change in white luminance due to the correction of the input video signal in the light source control unit. Driving method.
JP2000336453A 2000-11-02 2000-11-02 Transmission type image display device and driving method of transmission type image display device Active JP4594510B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2000336453A JP4594510B2 (en) 2000-11-02 2000-11-02 Transmission type image display device and driving method of transmission type image display device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2000336453A JP4594510B2 (en) 2000-11-02 2000-11-02 Transmission type image display device and driving method of transmission type image display device

Publications (2)

Publication Number Publication Date
JP2002140038A JP2002140038A (en) 2002-05-17
JP4594510B2 true JP4594510B2 (en) 2010-12-08

Family

ID=18812019

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2000336453A Active JP4594510B2 (en) 2000-11-02 2000-11-02 Transmission type image display device and driving method of transmission type image display device

Country Status (1)

Country Link
JP (1) JP4594510B2 (en)

Families Citing this family (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE60237440D1 (en) 2001-02-27 2010-10-07 Dolby Lab Licensing Corp Image display devices with large dynamic range
CN1643565B (en) 2002-03-13 2013-09-04 杜比实验室特许公司 High dynamic range display devices
JP3858850B2 (en) 2003-05-06 2006-12-20 セイコーエプソン株式会社 Display device, display method, and projector
JP2005107211A (en) * 2003-09-30 2005-04-21 Olympus Corp Image projector
KR100985859B1 (en) 2004-04-27 2010-10-08 삼성전자주식회사 Liquid crystal display apparatus and control method thereof
KR100565810B1 (en) 2004-06-16 2006-03-29 삼성전자주식회사 Color signal processing apparatus and method of using the same
CN101116133B (en) 2004-12-23 2014-02-05 杜比实验室特许公司 Wide color gamut displays
US8310442B2 (en) 2005-02-23 2012-11-13 Pixtronix, Inc. Circuits for controlling display apparatus
US9158106B2 (en) 2005-02-23 2015-10-13 Pixtronix, Inc. Display methods and apparatus
US8519945B2 (en) 2006-01-06 2013-08-27 Pixtronix, Inc. Circuits for controlling display apparatus
US8526096B2 (en) 2006-02-23 2013-09-03 Pixtronix, Inc. Mechanical light modulators with stressed beams
CA2817616A1 (en) * 2005-02-23 2006-08-31 Pixtronix, Inc. A display utilizing a control matrix to control movement of mems-based light modulators
US20070205969A1 (en) 2005-02-23 2007-09-06 Pixtronix, Incorporated Direct-view MEMS display devices and methods for generating images thereon
US7999994B2 (en) 2005-02-23 2011-08-16 Pixtronix, Inc. Display apparatus and methods for manufacture thereof
US9261694B2 (en) 2005-02-23 2016-02-16 Pixtronix, Inc. Display apparatus and methods for manufacture thereof
US9229222B2 (en) 2005-02-23 2016-01-05 Pixtronix, Inc. Alignment methods in fluid-filled MEMS displays
KR101133572B1 (en) 2005-06-21 2012-04-05 삼성전자주식회사 Color gamut reproducing apparatus having wide color gamut and color signal processing method the same
JP4701863B2 (en) * 2005-06-24 2011-06-15 株式会社日立製作所 Signal conversion method and signal conversion apparatus
WO2007032054A1 (en) * 2005-09-12 2007-03-22 Fujitsu Limited Displaying method and display
US8451391B2 (en) 2006-09-26 2013-05-28 Sharp Kabushiki Kaisha Liquid crystal display device achieving predetermined color temperature while preventing a shift in color tone by correcting blue luminance
US9176318B2 (en) 2007-05-18 2015-11-03 Pixtronix, Inc. Methods for manufacturing fluid-filled MEMS displays
JP4837009B2 (en) * 2008-09-12 2011-12-14 ミツミ電機株式会社 Liquid crystal display
US8169679B2 (en) 2008-10-27 2012-05-01 Pixtronix, Inc. MEMS anchors
US9082353B2 (en) 2010-01-05 2015-07-14 Pixtronix, Inc. Circuits for controlling display apparatus
KR101798312B1 (en) 2010-02-02 2017-11-15 스냅트랙, 인코포레이티드 Circuits for controlling display apparatus
US9134552B2 (en) 2013-03-13 2015-09-15 Pixtronix, Inc. Display apparatus with narrow gap electrostatic actuators

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003532154A (en) * 2000-05-04 2003-10-28 コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ Display device and irradiation system assembly

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11296127A (en) * 1998-04-07 1999-10-29 Hitachi Ltd Liquid crystal display device
JP2001135118A (en) * 1999-11-02 2001-05-18 Toshiba Corp Panel light source device and flat display using the same
JP3636979B2 (en) * 2000-09-20 2005-04-06 埼玉日本電気株式会社 Color correction method for RGB LED light emission

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003532154A (en) * 2000-05-04 2003-10-28 コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ Display device and irradiation system assembly

Also Published As

Publication number Publication date
JP2002140038A (en) 2002-05-17

Similar Documents

Publication Publication Date Title
WO2018120609A1 (en) Liquid crystal display device and driving method therefor
US20150062144A1 (en) Device, system and method for color display
JP5140206B2 (en) Color signal processing device
US8411022B2 (en) Multiprimary color display with dynamic gamut mapping
CN102667904B (en) Method and system for backlight control using statistical attributes of image data blocks
US8139021B2 (en) Histogram-based dynamic backlight control systems and methods
US8059082B2 (en) Display device comprising an ajustable light source
TWI476753B (en) A method of processing image data for display on a display device, which comprising a multi-primary image display panel
US8026953B2 (en) Method for processing color image data
JP4175485B2 (en) Driving device and driving method for liquid crystal display device
JP4979776B2 (en) Image display device and image display method
JP5436647B2 (en) Display device and control method
EP1844462B1 (en) Driving a display comprising a RGBW color space
US8325198B2 (en) Color gamut mapping and brightness enhancement for mobile displays
JP5863925B2 (en) Control apparatus and control method
JP5963933B2 (en) Signal conversion apparatus and method, program, and recording medium
US7839418B2 (en) Apparatus and method for driving liquid crystal display device
US7859499B2 (en) Display apparatus
US7956823B2 (en) Color display device, color compensation method, color compensation program, and storage medium readable by computer
US9953590B2 (en) Color display devices and methods with enhanced attributes
TWI343218B (en) Systems and methods for implementing improved gamut mapping algorithms
US7167214B2 (en) Signal processing unit and liquid crystal display device
KR101007714B1 (en) INput Gamma Dithering Systems and Methods
JP3679060B2 (en) Color display device
US7843414B2 (en) Liquid crystal display driver and method thereof

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20061208

A711 Notification of change in applicant

Free format text: JAPANESE INTERMEDIATE CODE: A711

Effective date: 20071106

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20100330

RD03 Notification of appointment of power of attorney

Free format text: JAPANESE INTERMEDIATE CODE: A7423

Effective date: 20100528

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20100528

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20100608

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A821

Effective date: 20100528

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20100720

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20100825

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20100914

A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

R150 Certificate of patent or registration of utility model

Ref document number: 4594510

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R150

Free format text: JAPANESE INTERMEDIATE CODE: R150

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20130924

Year of fee payment: 3

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20100917

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250