WO2012164688A1 - 表示装置、表示方法 - Google Patents
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- WO2012164688A1 WO2012164688A1 PCT/JP2011/062502 JP2011062502W WO2012164688A1 WO 2012164688 A1 WO2012164688 A1 WO 2012164688A1 JP 2011062502 W JP2011062502 W JP 2011062502W WO 2012164688 A1 WO2012164688 A1 WO 2012164688A1
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- video signal
- luminance
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- backlight
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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
- G09G3/3406—Control of illumination source
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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
- G09G3/3406—Control of illumination source
- G09G3/3413—Details of control of colour illumination sources
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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
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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
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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
- G09G3/3406—Control of illumination source
- G09G3/342—Control of illumination source using several illumination sources separately controlled corresponding to different display panel areas, e.g. along one dimension such as lines
- G09G3/3426—Control of illumination source using several illumination sources separately controlled corresponding to different display panel areas, e.g. along one dimension such as lines the different display panel areas being distributed in two dimensions, e.g. matrix
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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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- 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
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- 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
- G09G2320/0242—Compensation of deficiencies in the appearance of colours
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- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/04—Maintaining the quality of display appearance
- G09G2320/043—Preventing or counteracting the effects of ageing
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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
- 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
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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
- G09G2320/00—Control of display operating conditions
- G09G2320/06—Adjustment of display parameters
- G09G2320/0686—Adjustment of display parameters with two or more screen areas displaying information with different brightness or colours
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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
- G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
- G09G2330/02—Details of power systems and of start or stop of display operation
- G09G2330/021—Power management, e.g. power saving
Definitions
- the present invention relates to a display device provided with a plurality of primary color backlights of different colors.
- the standard lighting environment is, for example, a color temperature of 5000K in the printing field and 6500K in HDTV (high-definition television), and varies depending on the field of use.
- a display device is required to simultaneously display a plurality of images with different white point settings in one screen.
- the brightness of the screen A corresponding to the first video signal is 80 cd / m 2, for example, and the brightness of the screen B corresponding to the second video signal is 70 cd / m 2, for example.
- An example of a display device that simultaneously displays a plurality of screens having luminance chromaticity in one screen will be described.
- the luminance chromaticity of the white point for example, luminance 80 cd / m2, color temperature 5000K
- the backlight is adjusted to the luminance chromaticity of the screen A having the highest setting luminance, and the screen group (screen B) having the low luminance is adjusted to darken the video signal.
- Patent Document 1 describes a technique for displaying two images on one screen based on a plurality of video signals.
- FIG. 6 is a diagram showing the relationship between the wavelength of the backlight and the light output when two screens are displayed by one display device.
- the backlight wavelength is shown in the case of three colors of blue (B), green (G), and red (R).
- B blue
- G green
- R red
- This figure shows a case where the luminance (here, green light output) is adjusted by adjusting the luminance chromaticity of the backlight to the screen A side and darkening the image on the screen B side.
- the ratio of the light output of R, G, B included in white displayed on the screen B is different from the white point setting value (screen B required luminance) of the user. That is, on the screen B, the user's white point setting value does not match the actual chromaticity.
- the light output state (references a, b, c) corresponding to the required luminance on the screen B and the light output state (references e, f, g) when the image actually displayed on the screen B is output. ) Does not match.
- FIG. 7 is a diagram showing the relationship between the wavelength of the backlight and the light output when the video signal is further adjusted from the state of FIG.
- the ratio of R, G, and B light outputs (symbols a, b, and c) included in white displayed on the screen B matches the white point setting value of the user.
- the light output (symbols d, e, f) of each color when displayed on B is largely insufficient and the luminance is lowered.
- FIG. 8 is a diagram illustrating the backlight required luminance for each screen.
- the back The light drives the backlight with a light output (symbols d, e, f) corresponding to the required luminance in the screen A.
- the luminance is insufficient.
- the problem to be solved is that when a screen corresponding to a plurality of video signals is displayed on the screen of one display device, a desired white spot cannot be displayed simultaneously.
- the present invention is a display device in which a plurality of backlights of different primary colors are provided, and a liquid crystal panel is illuminated from the back of the display by the backlights to display a color image, and includes a first video signal and a second video signal.
- a display unit that displays two images on one screen, a luminance color temperature setting unit that sets luminance and color temperature of a white point of the first video signal and the second video signal, the first video signal, For each of the second video signals, the required luminance according to the set luminance is calculated for each color of the backlight, and the required luminance corresponding to the first video signal and the first luminance are calculated based on the calculation result.
- a calculation unit that obtains a high required luminance among the required luminances corresponding to the two video signals as the target luminance for each color, and a backlight that drives the backlight of each color according to the target luminance of each color obtained by the calculation unit Driving A video signal lower than the target luminance among the required luminance corresponding to the first video signal and the required luminance corresponding to the second video signal.
- a detection unit that detects the required luminance for each color, and according to the detection result of the detection unit, the required luminance corresponding to the first video signal and the required luminance corresponding to the second video signal
- a brightness adjusting unit that adjusts each color so that an image corresponding to a video signal lower than the target luminance is darkened.
- the present invention is also a display method in a display device in which a plurality of backlights of different primary colors are provided, and a liquid crystal panel is illuminated from the back of the display by the backlight to display a color image.
- 2 receives an input for setting the brightness and color temperature of the white point of the video signal 2, and sets the requested brightness according to the set brightness for each of the first video signal and the second video signal to the backlight. For each color, and based on the calculation result, a higher required luminance among the required luminance corresponding to the first video signal and the required luminance corresponding to the second video signal is set as the target luminance for each color.
- the backlight of each color is driven according to the obtained target luminance of each color, the required luminance and the target luminance are compared, and the required luminance corresponding to the first video signal and the second video are compared.
- the required luminance corresponding to the video signal lower than the target luminance among the required luminance corresponding to the signal is detected for each color, and the required luminance corresponding to the first video signal and the second luminance are detected according to the detection result.
- adjustment is made for each color so that an image corresponding to the video signal lower than the target luminance is dark, and the first video signal and the second video are adjusted according to the adjustment result. Two images of the signal are displayed on one screen.
- Multiple images with different white spot luminance chromaticity settings can be displayed on the display screen of one display device according to the desired white point.
- FIG. 4 is a diagram illustrating an example of a screen displayed on the display device 1.
- FIG. It is a figure showing the multi-color required brightness
- FIG. 10 is a diagram illustrating a relationship between a light output corresponding to a required luminance on screen B and a light output on screen B displayed on display unit 19. It is a figure showing the relationship between the wavelength of a backlight, and the light output at the time of displaying two screens with one display apparatus. It is a figure showing the relationship between the wavelength of a backlight, and a light output when adjusting a video signal and adjusting chromaticity to a setting value. It is a figure showing the backlight request
- FIG. 1 is a schematic block diagram showing the configuration of the display device 1 in the present embodiment.
- the display device 1 is a display device that displays a color image by illuminating a liquid crystal panel with a backlight of primary colors of R (red), G (green), and B (blue) from the back of the display.
- the display device 1 has a function of displaying both tables of a screen corresponding to the first video signal and a screen corresponding to the second video signal on one display screen.
- FIG. 2 is a diagram illustrating an example of a screen displayed on the display device 1.
- a single display screen has a function of displaying both a screen based on the first video signal (reference A) and a screen based on the second video signal (reference B).
- This figure shows a case where a plurality of screens having different white spots are displayed on the same screen.
- On the screen based on the first video signal (reference A) an image is displayed with a luminance of 80 cd / m 2 and a color temperature of 5000 K, and on the screen based on the second video signal (reference B), the luminance is 70 cd.
- An image is displayed at a color temperature of 9300K / m 2 .
- the first screen white spot setting information storage unit 10 stores white setting information set for the first screen which is a screen corresponding to the first video signal.
- the second screen white spot setting information storage unit 11 stores white setting information set for the second screen that is a screen corresponding to the second video signal.
- the white setting information is stored in the first screen white spot setting information storage unit 10 and the second screen white spot setting information storage unit 11 in accordance with an instruction input by the user using the display device 1.
- the white setting information is information representing the white point luminance chromaticity.
- the first screen white point setting information storage unit 10 stores the luminance “80 cd / m 2” and the second screen white point setting information.
- the storage unit 11 stores the luminance “70 cd / m 2”.
- the color temperature “5000K” is stored in the first screen white spot setting information storage unit 10 and the color temperature “9300K” is stored in the second screen white spot setting information storage unit 11 as the white setting information.
- the white point setting receiving unit 12 includes white setting information (# 0) stored in the first screen white point setting information storage unit 10 and white setting information (# 1) stored in the second screen white point setting information storage unit 11. ) And.
- the multicolor luminance generation / comparison unit 13 receives the white setting information (# 0, # 1) read by the white setting reception unit 12 and, based on the input white setting information, white point setting information for each screen. Then, the required luminance (# 2) of multiple colors is converted, and the required luminance for each screen is compared.
- the multi-color required luminance is, for example, the RGB required luminance of the backlight.
- the required luminance is obtained for each screen and for each backlight color.
- FIG. 3 is a diagram illustrating the multi-color required luminance converted from the white setting information by the multi-color luminance generation comparing unit 13.
- the vertical axis represents the light output
- the horizontal axis represents the backlight wavelength (B, G, R).
- the multicolor luminance generation / comparison unit 13 converts the white setting information stored in the first screen white spot setting information storage unit 10 into the required luminance of the screen A.
- the multicolor luminance generation / comparison unit 13 calculates the required luminance according to the set luminance for each of the first video signal and the second video signal for each color of the backlight, and based on the calculation result, Of the required luminance corresponding to one video signal and the required luminance corresponding to the second video signal, a higher required luminance is obtained as a target luminance for each color.
- the multicolor luminance generation / comparison unit 13 compares the light output of the blue backlight (symbol a), the light output of the green backlight (symbol b), and the light output of the red backlight (symbol c). The value is obtained as the required brightness on screen A.
- the multicolor luminance generation / comparison unit 13 converts the white setting information stored in the second screen white spot setting information storage unit 11 into the required luminance of the screen B.
- the multicolor luminance generation / comparison unit 13 uses the values of the blue backlight light output (symbol d), the green backlight light output (symbol e), and the red backlight light output (symbol f) as the screen B. As the required brightness.
- the multicolor luminance generation / comparison unit 13 compares the required luminance obtained for each screen for each color, selects the highest luminance for each color, and uses this as the backlight target luminance, and the backlight luminance selecting unit 14 Output to.
- the multicolor luminance generation comparison unit 13 compares the required luminance of the screen A and the screen B for each color of blue, green, and red, and the light output corresponding to the required luminance is the screen. Compare which of A and Screen B is larger.
- the multi-color luminance generation / comparison unit 13 requires the required luminance (reference symbol d) of the screen B in blue, the required luminance (reference symbol b) of the screen A in green, and the required luminance (reference symbol in the red) in red It is determined that c) is large, and the determination result is output to the backlight luminance selection unit 14 as the backlight target luminance.
- the multicolor luminance generation comparison unit 13 compares the required luminance with the target luminance, and an image lower than the target luminance among the required luminance corresponding to the first video signal and the required luminance corresponding to the second video signal. The required luminance corresponding to the signal is detected for each color. In other words, the multicolor luminance generation comparing unit 13 compares the required luminance for each screen with the obtained backlight target luminance for each color, and detects a color whose required luminance is lower than the backlight target luminance.
- the multicolor luminance generation / comparison unit 13 detects the blue light output (symbol a) of the screen A, the green light output (symbol e) of the screen B, and the red light output (symbol f) of the screen B. To do.
- the multicolor luminance generation / comparison unit 13 outputs the detection result to the video color brightness calculation unit 16.
- the backlight luminance selection unit 14 obtains the backlight target luminance output from the multicolor luminance generation comparison unit 13 and outputs the backlight target luminance to the backlight driving circuit 15.
- the backlight drive circuit 15 drives each color (R, G, B) of the backlight so that the luminance corresponds to the backlight target luminance output from the backlight luminance selection unit 14.
- the required luminance of screen B (reference symbol d in FIG. 3) is used as the blue target luminance
- the required luminance of screen A (reference symbol b) in FIG. 3 is used as the green target luminance
- the red target luminance is Using the required luminance (symbol c) of the screen A, each color of R, G, and B is driven so as to achieve this target luminance.
- PWM pulse width modulation
- the backlight driven here is, for example, an LED (light emitting diode) corresponding to each color of R, G, and B.
- the video color brightness calculation unit 16 makes the video signal of the screen corresponding to the backlight color, which is lower than the backlight luminance, darker. Adjust the video signal for each color. For example, the video color brightness calculation unit 16 outputs the blue light output of the screen A (reference symbol a in FIG. 3), the green light output of the screen B (reference symbol e of FIG. 3), and the red light output of the screen B (reference symbol of FIG. 3). For f), the video signal is adjusted and displayed dark.
- FIG. 4 is a diagram showing the brightness of the video signal for each screen.
- the vertical axis represents the brightness, and here is the signal input / output ratio (gain).
- the horizontal axis represents the wavelength (blue, green, red) of the video signal.
- the backlight target luminance the required luminance of screen B in blue (reference symbol d in FIG. 3), the required luminance of screen B in green (reference symbol b in FIG. 3), and the required luminance of screen A in red (reference symbol c) Is used to drive the backlight.
- the brightness of the screen B, the brightness of the screen B in red is calculated, and according to the obtained brightness, the video signal of the screen A in blue, the video signal of the screen B in green, and the screen in red Brightness is calculated so that the image corresponding to the B video signal becomes dark.
- the light emission color is calculated based on the ratio of the light output of the backlights of the screen A and the screen B so that the image of the video signal becomes dark.
- the brightness adjustment unit 17 adjusts the brightness of the first video signal (for example, the signal video A) based on the calculation result of the video color brightness calculation unit 16. For example, when the calculation result that darkens the brightness of the blue color of the screen A is output from the video color brightness calculation unit 16, the brightness adjustment unit 17 displays the screen A (video image in blue according to the output calculation result. The video signal is adjusted so that the brightness of the signal A) becomes darker.
- the brightness adjustment unit 18 adjusts the brightness of the second video signal (for example, the signal video B) based on the calculation result of the video color brightness calculation unit 16. For example, when the calculation result that darkens the brightness for the green color of the screen B and the red color of the screen B is output from the video color brightness calculation unit 16, the brightness adjustment unit 18 outputs the screen A according to the output calculation result.
- the video signal is adjusted so that the green brightness and the red brightness of (video signal B) become darker.
- the brightness adjustment unit 17 and the brightness adjustment unit 18 adjust the video signal using a gamma LUT (LookUpTable), for example, for video signals corresponding to R, G, and B included in the video signal. In this way, image quality deterioration can be suppressed by performing gamma correction so that the target video signal becomes dark. It is also possible to use a circuit such as a video attenuator / brightness / contrast.
- the brightness adjustment unit 17 and the brightness adjustment unit 18 perform darkening correction on the video signal corresponding to the screen color that was not instructed to darken the brightness by the video color brightness calculation unit 16. It does not have to be.
- the display unit 19 is, for example, a liquid crystal panel, and displays an image corresponding to the video signal A adjusted by the brightness adjusting unit 17 and the video signal B adjusted by the brightness adjusting unit 18.
- both the screen A and the screen B can be displayed with a desired white point.
- FIG. 5 is a diagram showing the relationship between the light output corresponding to the required luminance on the screen B and the light output of the screen B displayed on the display unit 19.
- the light outputs of R, G, and B included in the white color of screen B are compared.
- the light output of the set value (required luminance) and the display state of the image actually displayed on the display unit 19 are substantially the same for each color. That is, among the multiple screens (screen A and screen B) having different white point settings, a screen having a low luminance can be correctly displayed.
- the higher backlight required luminance is set as the backlight target luminance, and the backlight is driven.
- the video signal corresponding to the lower required luminance of the backlight is adjusted to be dark.
- a plurality of screens having different white point settings for example, screen A has a luminance of 80 cd / m 2 and a color temperature of 5000 K, and screen B has a luminance of 70 cd / m 2 and a color temperature of 9300 K
- screen A has a luminance of 80 cd / m 2 and a color temperature of 5000 K
- screen B has a luminance of 70 cd / m 2 and a color temperature of 9300 K
- They can be displayed simultaneously on the screen (eg, FIG. 1).
- the backlight output can be minimized while maintaining the target image quality, so that the image quality, power consumption, and aging degradation characteristics of the display device can be improved.
- any color space including the number of colors can be selected for the above-described multicolor luminance.
- the same number of colors and color space as the backlight are suitable for eliminating redundancy, but the CIE1931XYZ color space may be used for simplification.
- the program for realizing the function of the display device 1 in FIG. 1 is recorded on a computer-readable recording medium, and the program recorded on the recording medium is read into a computer system and executed, thereby executing luminance chromaticity. Management may be performed.
- the “computer system” includes an OS and hardware such as peripheral devices.
- the “computer system” includes a homepage providing environment (or display environment) if a WWW system is used.
- the “computer-readable recording medium” refers to a storage device such as a flexible medium, a magneto-optical disk, a portable medium such as a ROM or a CD-ROM, and a hard disk incorporated in a computer system.
- the “computer-readable recording medium” includes a medium that holds a program for a certain period of time, such as a volatile memory inside a computer system serving as a server or a client.
- the program may be a program for realizing a part of the functions described above, and may be a program capable of realizing the functions described above in combination with a program already recorded in a computer system.
- the program may be stored in a predetermined server, and the program may be distributed (downloaded or the like) via a communication line in response to a request from another device.
- the present invention relates to a display device that performs high-precision color reproduction, and is particularly effective in the fields of graphic design, printing shops, medical displays, and the like.
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- Crystallography & Structural Chemistry (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Liquid Crystal Display Device Control (AREA)
- Liquid Crystal (AREA)
Abstract
Description
このような異なる利用分野における色味を確認するため、表示装置では白点設定の異なる複数の画像を1つの画面内において同時表示することが求められている。
図6は、2つの画面を1つの表示装置によって表示した場合におけるバックライトの波長と光出力との関係を表す図である。バックライトの波長としては、青色(B)、緑色(G)、赤色(R)の3色の場合について図示されている。
この図では、バックライトの輝度色度を画面A側にあわせ、画面B側の映像を暗くして輝度(ここでは緑光出力)を調節した場合を表す。このとき、画面Bに表示された白色に含まれるR、G、Bの光出力の比は、利用者の白点設定値(画面B要求輝度)と異なる。すなわち、画面Bにおいて利用者の白点設定値と実際の色度とが合っていない。ここでは、画面Bにおける要求輝度に対応する光出力の状態(符号a、b、c)と、実際に画面Bに表示された画像を出力した際の光出力の状態(符号e、f、g)とが一致していない。
表示装置1は、液晶パネルを表示背面からR(赤色)、G(緑色)、B(青色)の原色のバックライトによって照明し、カラー画像を表示する表示装置である。ここでは、表示装置1は、1つの表示画面上に、第1の映像信号に応じた画面と第2の映像信号に応じた画面との両表を表示する機能を有する。
多色輝度生成比較部13は、第1画面白点設定情報記憶部10に記憶された白色設定情報から、画面Aの要求輝度へ変換する。多色輝度生成比較部13は、第1の映像信号と第2の映像信号とのそれぞれに対し、設定輝度に従った要求輝度をバックライトの色毎に算出し、算出結果に基づいて、第1の映像信号に対応する要求輝度と第2の映像信号に対応する要求輝度とのうち高い要求輝度を色毎に目標輝度として得る。
また、多色輝度生成比較部13は、第2画面白点設定情報記憶部11に記憶された白色設定情報から、画面Bの要求輝度へ変換する。多色輝度生成比較部13は、青色のバックライトの光出力(符号d)、緑色のバックライトの光出力(符号e)、赤色のバックライトの光出力(符号f)の値を、画面Bにおける要求輝度として得る。
また、「コンピュータ読み取り可能な記録媒体」とは、フレキシブルディスク、光磁気ディスク、ROM、CD-ROM等の可搬媒体、コンピュータシステムに内蔵されるハードディスク等の記憶装置のことをいう。さらに「コンピュータ読み取り可能な記録媒体」とは、サーバやクライアントとなるコンピュータシステム内部の揮発性メモリのように、一定時間プログラムを保持しているものを含むものとする。また上記プログラムは、前述した機能の一部を実現するためのものであっても良く、さらに前述した機能をコンピュータシステムにすでに記録されているプログラムとの組み合わせで実現できるものであってもよい。また、上記のプログラムを所定のサーバに記憶させておき、他の装置からの要求に応じて、当該プログラムを通信回線を介して配信(ダウンロード等)させるようにしてもよい。
10 第1画面白点設定情報記憶部
11 第2画面白点設定情報記憶部
12 白点設定受信部
13 多色輝度生成比較部
14 バックライト輝度選択部
15 バックライト駆動回路
16 映像色明るさ計算部
17 明るさ調整部
18 明るさ調整部
19 表示部
Claims (2)
- 異なる原色のバックライトが複数設けられ、当該バックライトによって液晶パネルを表示背面から照射してカラー画像を表示する表示装置であって、
第1の映像信号と第2の映像信号の2つの画像を1画面に表示する表示部と、
第1の映像信号と第2の映像信号の白点の輝度及び色温度を設定する輝度色温度設定部と、
前記第1の映像信号と前記第2の映像信号とのそれぞれに対し、前記設定輝度に従った要求輝度を前記バックライトの色毎に算出し、算出結果に基づいて、前記第1の映像信号に対応する要求輝度と前記第2の映像信号に対応する要求輝度とのうち高い要求輝度を前記色毎に目標輝度として得る算出部と、
前記算出部によって得られた各色の目標輝度に従って当該各色のバックライトを駆動するバックライト駆動部と、
前記要求輝度と前記目標輝度とを比較し、前記第1の映像信号に対応する要求輝度と前記第2の映像信号に対応する要求輝度とのうち前記目標輝度より低い映像信号に対応する要求輝度を、前記色毎に検出する検出部と、
前記検出部の検出結果に従って、前記第1の映像信号に対応する要求輝度と前記第2の映像信号に対応する要求輝度とのうち前記目標輝度より低い映像信号に応じた画像が暗くなるように、各色に対して調整する明るさ調整部と、
を有することを特徴とする表示装置。 - 異なる原色のバックライトが複数設けられ、当該バックライトによって液晶パネルを表示背面から照射してカラー画像を表示する表示装置における表示方法であって、
第1の映像信号と第2の映像信号の白点の輝度及び色温度を設定する入力を受け付け、
前記第1の映像信号と前記第2の映像信号とのそれぞれに対し、前記設定輝度に従った要求輝度を前記バックライトの色毎に算出し、算出結果に基づいて、前記第1の映像信号に対応する要求輝度と前記第2の映像信号に対応する要求輝度とのうち高い要求輝度を前記色毎に目標輝度として得て、
前記得られた各色の目標輝度に従って当該各色のバックライトを駆動し、
前記要求輝度と前記目標輝度とを比較し、前記第1の映像信号に対応する要求輝度と前記第2の映像信号に対応する要求輝度とのうち前記目標輝度より低い映像信号に対応する要求輝度を、前記色毎に検出し、
前記検出結果に従って、前記第1の映像信号に対応する要求輝度と前記第2の映像信号に対応する要求輝度とのうち前記目標輝度より低い映像信号に応じた画像が暗くなるように、各色に対して調整し、
調整結果に応じて第1の映像信号と第2の映像信号の2つの画像を1画面に表示する
ことを特徴とする表示方法。
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Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2004159986A (ja) * | 2002-11-14 | 2004-06-10 | Fuji Photo Film Co Ltd | 液晶表示装置 |
JP2005521905A (ja) * | 2002-04-02 | 2005-07-21 | 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 | Lcディスプレイ用のウィンドウ輝度エンハンスメント |
JP2006145836A (ja) * | 2004-11-19 | 2006-06-08 | Alpine Electronics Inc | 液晶画面色調補正装置 |
JP2008090076A (ja) * | 2006-10-03 | 2008-04-17 | Sharp Corp | 液晶表示装置 |
JP2009116226A (ja) * | 2007-11-09 | 2009-05-28 | Denso Corp | 液晶表示装置 |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH11194736A (ja) * | 1998-01-07 | 1999-07-21 | Nec Corp | 液晶表示装置 |
JP3433406B2 (ja) * | 1999-10-18 | 2003-08-04 | インターナショナル・ビジネス・マシーンズ・コーポレーション | ホワイトポイント調整方法、カラー画像処理方法、ホワイトポイント調整装置、および液晶表示装置 |
JP4503250B2 (ja) | 2002-08-09 | 2010-07-14 | 株式会社半導体エネルギー研究所 | マルチウィンドウ表示装置 |
KR101144265B1 (ko) * | 2005-10-10 | 2012-05-11 | 삼성전자주식회사 | 밝기 보상 변환 기능을 구비한 색 온도 변환 방법 및 장치 |
US8872753B2 (en) * | 2006-08-31 | 2014-10-28 | Ati Technologies Ulc | Adjusting brightness of a display image in a display having an adjustable intensity light source |
US20100085297A1 (en) * | 2007-05-02 | 2010-04-08 | Nxp B.V. | Display system and method of controlling a display system |
CN101303839A (zh) | 2007-05-08 | 2008-11-12 | 日本胜利株式会社 | 液晶显示装置及用于该装置的影像显示方法 |
US7911442B2 (en) * | 2007-08-27 | 2011-03-22 | Au Optronics Corporation | Dynamic color gamut of LED backlight |
JP5284710B2 (ja) * | 2008-07-24 | 2013-09-11 | パナソニック株式会社 | 映像表示装置 |
JP5305884B2 (ja) * | 2008-12-17 | 2013-10-02 | 株式会社東芝 | 画像処理装置、画像処理方法、及び画像処理プログラム |
JP2011033985A (ja) * | 2009-08-05 | 2011-02-17 | Victor Co Of Japan Ltd | 液晶表示装置及びこれに用いる映像表示方法 |
JP5375517B2 (ja) * | 2009-10-23 | 2013-12-25 | ソニー株式会社 | 色温度調整装置、色温度調整方法、及びプログラム |
JP2011154174A (ja) * | 2010-01-27 | 2011-08-11 | Mitsubishi Electric Corp | マルチ画面表示装置 |
US9123303B2 (en) * | 2010-04-23 | 2015-09-01 | Nec Display Solutions, Ltd. | Display device, display method, and program |
-
2011
- 2011-05-31 JP JP2013517747A patent/JP5721196B2/ja active Active
- 2011-05-31 WO PCT/JP2011/062502 patent/WO2012164688A1/ja active Application Filing
- 2011-05-31 US US14/116,118 patent/US9047825B2/en active Active
- 2011-05-31 CN CN201180071333.8A patent/CN103562990B/zh active Active
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2005521905A (ja) * | 2002-04-02 | 2005-07-21 | 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 | Lcディスプレイ用のウィンドウ輝度エンハンスメント |
JP2004159986A (ja) * | 2002-11-14 | 2004-06-10 | Fuji Photo Film Co Ltd | 液晶表示装置 |
JP2006145836A (ja) * | 2004-11-19 | 2006-06-08 | Alpine Electronics Inc | 液晶画面色調補正装置 |
JP2008090076A (ja) * | 2006-10-03 | 2008-04-17 | Sharp Corp | 液晶表示装置 |
JP2009116226A (ja) * | 2007-11-09 | 2009-05-28 | Denso Corp | 液晶表示装置 |
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