DISPLAY DEVICE AND TELEVISION DEVICE

• US 20180188610A1
• Filed: 06/28/2016
• Published: 07/05/2018
• Est. Priority Date: 06/30/2015
• Status: Abandoned Application

• Current Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.), Siemens Corp. (Siemens AG)
• Original Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Application Number:
  US15/740,108
• Publication Number:
  US 20180188610A1
• Time in Patent Office: Days
• CPC Class Codes: F21Y 2113/10 of different colours
• CPC Class Codes: G02F 1/133514 Colour filters
• CPC Class Codes: G02F 1/133621 providing coloured light G02F1/133617, G02F1/133533 take precedence
• CPC Class Codes: G09F 13/04 Signs, boards or panels, illuminated from behind the insignia
• CPC Class Codes: G09G 2300/0452 Details of colour pixel setup, e.g. pixel composed of a red, a blue and two green components
• CPC Class Codes: G09G 2320/0242 Compensation of deficiencies in the appearance of colours
• CPC Class Codes: G09G 2320/0666 for control of colour parameters, e.g. colour temperature
• CPC Class Codes: G09G 3/20 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
• CPC Class Codes: G09G 3/34 by control of light from an independent source
• CPC Class Codes: G09G 3/3413 Details of control of colour illumination sources
• CPC Class Codes: G09G 3/3426 the different display panel areas being distributed in two dimensions, e.g. matrix
• CPC Class Codes: G09G 3/36 using liquid crystals
• CPC Class Codes: G09G 3/3607 for displaying colours or for displaying grey scales with a specific pixel layout, e.g. using sub-pixels display of colours in flat matrix panels other than liquid crystal displays G09G3/2003; grey scales specific for television H04N3/127

Abstract

A liquid crystal display device includes a backlight unit, a control circuit board, and a liquid crystal panel including pixel portions. The backlight unit is configured such that an amount of emitting light rays in a first color included in light rays in different colors is larger when an amount of emitting light rays in each color required to obtain reference white light is defined as a reference amount. The control circuit board is configured to perform control such that a gray level of red pixel portions is lower than gray levels of the pixel portions configured to exhibit other colors during white display, the gray levels of the pixel portions during red display are lower than the gray levels thereof during the white display, and the gray level of the red pixel portions during the red display is higher than the gray level thereof during the white display.

Claims

1. A display device comprising:

a display panel including a plurality of pixel portions configured to exhibit different colors;

a lighting device for applying illumination light including light rays in a plurality of colors exhibiting different colors to the display panel, the lighting device being configured such that an amount of emitting light rays in first color included in the light rays in the plurality of colors is larger when an amount of emitting light rays in each color required to obtain reference white light for the illumination light; and

a pixel controller configured to perform control such that a gray level of first pixel portions configured to exhibit the first color among the plurality of pixel portions is lower than a gray level of the pixel portions configured to exhibit another color during white display and such that during first color display, the gray level of the pixel portions configured to exhibit the other color is lower than the gray level thereof during the white display and the gray level of the first pixel portions is higher than the gray level thereof during the white display.

2. The display device according to claim 1, wherein

the display panel is configured such that the plurality of pixel portions include at least red pixel portions configured to exhibit a red color, green pixel portions configured to exhibit a green color, and blue pixel portions configured to exhibit a blue color,

the light rays in the plurality of colors applied by the lighting device include at least red light rays, green light rays, and blue light rays,

the light rays in first color are the red light rays, and

the pixel controller is configured to perform the control with the red pixel portions as the first pixel portions.

3. The display device according to claim 1, wherein the lighting device is configured such that the amount of the emitting tight rays in the first color is 107% or higher when the amount of the emitting light rays in each color required to obtain the reference white light for the illumination light is defined as 100%.

4. The display device according to claim 1, wherein the display panel is configured such that the plurality of pixel portions exhibit four or more different colors.

5. The display device according to claim 4, wherein the lighting device is configured such that the amount of the emitting light rays in the first color is in a range from 125% to 220% when the amount of the emitting light rays in each color required to obtain the reference white light for the illumination light is defined as 100%.

6. The display device according to claim 4, wherein

the display panel is configured such that the plurality of pixel portions include at least red pixel portions configured to exhibit a red color, green pixel portions configured to exhibit a green color, blue pixel portions configured to exhibit a blue color, and yellow pixel portions configured to exhibit a yellow color,

the light rays in the plurality of colors applied by the lighting device include at least red light rays, green light rays, and blue light rays,

the light rays in first color are the red light rays, and

the pixel controller is configured to perform the control with the red pixel portions as the first pixel portions.

7. The display device according to claim 1, wherein

the lighting device include light emitting components configured to emit light rays and phosphors for converting wavelengths of light from the light emitting components,

the phosphors include at least first phosphors configured to emit light rays in the first color, and

the lighting device is configured such that a content of the first phosphors is higher when a content of the phosphors required to obtain the reference white light for the illumination light is defined as a reference content.

8. The display device according to claim 7, wherein the lighting device includes at least light sources including the light emitting components, cases holding the light emitting components, and sealants sealing the light emitting components in the cases, respectively, the sealants containing the phosphors.

9. The display device according to claim 8, wherein the light sources are configured such that the first phosphors are potassium silicofluoride using manganese for an activator.

10. The display device according to claim 7, wherein the lighting device includes at least light sources including the light emitting components and a wavelength conversion member containing the phosphors and being disposed on an exit side of a light emitting path relative to the light sources, the wavelength conversion member being configured to convert wavelengths of light rays from the light sources.

11. The display device according to claim 10, wherein the phosphors are quantum dot phosphors.

12. The display device according to claim 1, wherein

the lighting device includes at least a plurality of light emitting components configured to emit light rays in a plurality of colors, and

the lighting device is configured such that an amount of emitting light rays emitted by the first light emitting components configured to emit light rays in the first color is larger when an amount of emitting light rays in each color emitted by the plurality of light emitting components required to obtain the reference white light for the illumination light is defined as a reference amount.

13. A television device comprising the display device according to claim 1.