LIQUID CRYSTAL DISPLAY DEVICE AND IMAGE PROCESSING METHOD IN LIQUID CRYSTAL DISPLAY DEVICE
First Claim
1. A liquid crystal display device which causes an image to be displayed on a display panel in response to an image signal including first image data for displaying information of high importance and second image data for displaying information other than the information of high importance,the first image data having a gradation value exclusively used for the first image data,said liquid crystal display device, comprising:
- an image data identification section which determines whether image data to be processed is the first image data or the second image data by judging whether or not the image data has the gradation value exclusively used for the first image data; and
a gradation conversion section which carries out gradation conversion processing with respect to the image data so that luminance of a displayed image is reduced in a case where ambient brightness declines,the gradation conversion section carrying out the gradation conversion processing with respect to image data, which has been determined to be the second image data by the image identification section, so as to reduce the luminance of the image data.
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Abstract
A liquid crystal display device of at least one embodiment of the present invention causes an image to be displayed on a display panel in response to an image signal including image data (first image data) for warning display and image data (second image data) for general display. The image data for warning display has a gradation value exclusively used for the image data for warning display. The liquid crystal display device of at least one embodiment includes an image data identification section which identifies a type of image data by judging whether or not the image data has the gradation value exclusively used for the image data for warning display; and a gradation calculator (gradation conversion section) which carries out a conversion of gradation value with respect to the image data so that luminance of a displayed image is reduced in a case where ambient brightness declines.
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Citations
17 Claims
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1. A liquid crystal display device which causes an image to be displayed on a display panel in response to an image signal including first image data for displaying information of high importance and second image data for displaying information other than the information of high importance,
the first image data having a gradation value exclusively used for the first image data, said liquid crystal display device, comprising: -
an image data identification section which determines whether image data to be processed is the first image data or the second image data by judging whether or not the image data has the gradation value exclusively used for the first image data; and a gradation conversion section which carries out gradation conversion processing with respect to the image data so that luminance of a displayed image is reduced in a case where ambient brightness declines, the gradation conversion section carrying out the gradation conversion processing with respect to image data, which has been determined to be the second image data by the image identification section, so as to reduce the luminance of the image data. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. An image processing method for use in a liquid crystal display device which causes an image to be displayed on a display panel in response to an image signal including first image data for displaying information of high importance and second image data for displaying information other than the information of high importance,
the first image data having a gradation value exclusively used for the first image data, said image processing method comprising the steps of: -
(a) determining whether image data to be processed is the first image data or the second image data by judging whether or not the image data has the gradation value exclusively used for the first image data; and (b) carrying out gradation conversion processing with respect to the image data so that luminance of a displayed image is reduced in a case where ambient brightness declines, in the step (b), the gradation conversion processing is carried out with respect to image data, which has been determined to be the second image data in the step (a), so as to reduce the luminance of the image data. - View Dependent Claims (13, 14, 15, 16, 17)
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Specification