LIQUID CRYSTAL DISPLAY DEVICE AND METHOD FOR CONTROLLING DISPLAY OF LIQUID CRYSTAL DISPLAY DEVICE
First Claim
1. A liquid crystal display device, comprising:
- a liquid crystal panel including pixels arranged in a matrix; and
a backlight that irradiates the liquid crystal panel with light,the pixels each including a plurality of picture elements that are different from one another in color,the picture elements each being provided with a color filter corresponding to a color of the picture element,the liquid crystal display device further comprising;
an aperture ratio converting section that, in order to reduce light which has a wavelength of a color different from the color of the picture element and which is transmitted through the color filter with which the picture element is provided, decreases an aperture ratio of a picture element, the aperture ratio being included in inputted image data, and outputs data of the decreased aperture ratio; and
a backlight luminance control section that, in order to supplement the aperture ratio decreased by the aperture ratio converting section, increases a backlight luminance as compared to a case in which the aperture ratio is not decreased,the liquid crystal display device carrying out an intended gray scale display on a basis of (i) backlight luminances determined by the backlight luminance control section and (ii) aperture ratios of the respective picture elements in the liquid crystal panel, said aperture ratios having been obtained through an aperture ratio conversion process by the aperture ratio converting section.
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Accused Products
Abstract
An embodiment of a liquid crystal display device includes: a liquid crystal panel including pixels arranged in a pixel; and a backlight that irradiates it with light. In at least one example embodiment, the pixels included in the liquid crystal panel each include picture elements different in color. The picture elements are each provided with a color filter corresponding to the color of the picture element. The liquid crystal display device includes: an aperture ratio converting section that, to reduce optical cross talk, decreases an aperture ratio for inputted image data and outputs data of the aperture ratio; and a backlight data converting section that, to supplement the aperture ratio for the image data which is decreased by the aperture ratio converting section, converts data to increase a backlight luminance. This backlight luminance control prevents or reduces optical or electrical cross talk.
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Citations
9 Claims
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1. A liquid crystal display device, comprising:
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a liquid crystal panel including pixels arranged in a matrix; and a backlight that irradiates the liquid crystal panel with light, the pixels each including a plurality of picture elements that are different from one another in color, the picture elements each being provided with a color filter corresponding to a color of the picture element, the liquid crystal display device further comprising; an aperture ratio converting section that, in order to reduce light which has a wavelength of a color different from the color of the picture element and which is transmitted through the color filter with which the picture element is provided, decreases an aperture ratio of a picture element, the aperture ratio being included in inputted image data, and outputs data of the decreased aperture ratio; and a backlight luminance control section that, in order to supplement the aperture ratio decreased by the aperture ratio converting section, increases a backlight luminance as compared to a case in which the aperture ratio is not decreased, the liquid crystal display device carrying out an intended gray scale display on a basis of (i) backlight luminances determined by the backlight luminance control section and (ii) aperture ratios of the respective picture elements in the liquid crystal panel, said aperture ratios having been obtained through an aperture ratio conversion process by the aperture ratio converting section. - View Dependent Claims (2, 3, 4, 5)
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6. A liquid crystal display device, comprising:
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a liquid crystal panel including pixels arranged in a matrix; and a backlight that irradiates the liquid crystal panel with light, the pixels each including a plurality of picture elements that are different from one another in color, the picture elements each being provided with a color filter corresponding to a color of the picture element, the backlight including light sources having respective colors that correspond to picture elements having a plurality of colors, the liquid crystal display device further comprising; an aperture ratio converting section that, in order to reduce a gray scale difference between the picture elements in a pixel, converts aperture ratios, included in inputted image data, of said picture elements in the pixel and outputs data of the converted aperture ratios; and a backlight luminance control section that, in order to correct the gray scale difference between said picture elements in the pixel which gray scale difference has been reduced by the aperture ratio converting section, (i) increases, over a luminance of a light source having a color identical to a color of a picture element of which an aperture ratio is not changed by the aperture ratio converting section, a luminance of a light source having a color identical to a color of a picture element of which an aperture ratio is decreased by the aperture ratio converting section and (ii) decreases, against the luminance of the light source having the color identical to the color of the picture element of which the aperture ratio is not changed by the aperture ratio converting section, a luminance of a light source having a color identical to a color of a picture element of which an aperture ratio is increased by the aperture ratio converting section, the liquid crystal display device carrying out an intended gray scale display on a basis of (i) backlight luminances determined by the backlight luminance control section and (ii) aperture ratios of the respective picture elements in the liquid crystal panel, said aperture ratios having been obtained through an aperture ratio conversion process by the aperture ratio converting section. - View Dependent Claims (7)
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8. A method for controlling display of a liquid crystal display device including:
- a liquid crystal panel including pixels arranged in a matrix; and
a backlight that irradiates the liquid crystal panel with light, the pixels each including a plurality of picture elements that are different from one another in color, the picture elements each being provided with a color filter corresponding to a color of the picture element,the method comprising; an aperture ratio converting step for, in order to reduce light which has a wavelength of a color different from the color of the picture element and which is transmitted through the color filter with which the picture element is provided, decreasing an aperture ratio, included in inputted image data, of a picture element and outputting data of the decreased aperture ratio; and a backlight luminance control step for, in order to supplement the aperture ratio decreased in the aperture ratio converting step, increasing a backlight luminance as compared to a case in which the aperture ratio is not decreased, the liquid crystal display device carrying out an intended gray scale display on a basis of (i) backlight luminances determined in the backlight luminance control step and (ii) aperture ratios of the respective picture elements in the liquid crystal panel, said aperture ratios having been obtained through an aperture ratio conversion process in the aperture ratio converting step.
- a liquid crystal panel including pixels arranged in a matrix; and
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9. A method for controlling display of a liquid crystal display device including:
- a liquid crystal panel including pixels arranged in a matrix; and
a backlight that irradiates the liquid crystal panel with light, the pixels each including a plurality of picture elements that are different from one another in color, the picture elements each being provided with a color filter corresponding to a color of the picture element, the backlight including light sources having respective colors that correspond to picture elements having a plurality of colors,the method comprising; an aperture ratio converting step for, in order to reduce a gray scale difference between the picture elements in a pixel, converting aperture ratios of said picture elements in the pixel for inputted image data and outputting data of the converted aperture ratios; and a backlight luminance control step for, in order to correct the gray scale difference between said picture elements in the pixel which gray scale difference has been reduced in the aperture ratio converting step, (i) increasing, over a luminance of a light source having a color identical to a color of a picture element of which an aperture ratio is not changed in the aperture ratio converting step, a luminance of a light source having a color identical to a color of a picture element of which an aperture ratio is decreased in the aperture ratio converting step and (ii) decreasing, against the luminance of the light source having the color identical to the color of the picture element of which the aperture ratio is not changed in the aperture ratio converting step, a luminance of a light source having a color identical to a color of a picture element of which an aperture ratio is increased in the aperture ratio converting step, the method causing the liquid crystal display device to carry out an intended gray scale display on a basis of (i) backlight luminances determined in the backlight luminance control step and (ii) aperture ratios of the respective picture elements in the liquid crystal panel, said aperture ratios having been obtained through an aperture ratio conversion process in the aperture ratio converting step.
- a liquid crystal panel including pixels arranged in a matrix; and
Specification