Intensity compensation method and display control device and image display device applying the same
AssigneesNovatek (Shanghai) Co., Ltd., Novatek Microelectronics Corp.
InventorsMin Wei, Heng Yu, Jiande Jiang
Life of this patent
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Abstract
An intensity compensation method for a display control device includes steps of obtaining a plurality of backlight duties of a plurality of backlights according to an image data; calculating a plurality of compensation gains according to the plurality of backlight duties and a non-uniform backlight profile, wherein the non-uniform backlight profile indicates a plurality of respective actual intensity distributions of the plurality of backlights; and compensating a plurality of first image intensities corresponding to a plurality of pixels of the image data according to the plurality of compensation gains, to obtain a plurality of second image intensities.
Claims16
An intensity compensation method for a display control device of an image display device, comprising:
- obtaining a plurality of backlight duty cycles, or a plurality of backlight intensities, of a plurality of backlight sources according to a plurality of image intensities for an image data;
- obtaining a plurality of compensation gains for a plurality of pixels with respect to the image data, according to a plurality of respective actual backlight intensities, wherein each respective actual backlight intensity is corresponding to one of the pixels of the image data and is determined based on:
- at least two of the backlight duty cycles, which are respectively corresponding to a first backlight source and a second backlight source at least, of the backlight sources, and
- a plurality of backlight intensities corresponding to the pixels, which are measured when the first and the second backlight sources are respectively turned on with corresponding backlight duty cycles;
- and
- compensating a plurality of first image intensities corresponding to the plurality of pixels of the image data according to the plurality of compensation gains, to obtain a plurality of second image intensities.
An image display device, comprising:
- a plurality of backlight sources;
- a backlight driving circuit, configured to control the plurality of backlight sources with a plurality of backlight duty cycles;
- a display control device, coupled to the backlight driving circuit, and configured to:
- obtaining the plurality of backlight duty cycles, or a plurality of backlight intensities, of the plurality of backlight sources according to a plurality of image intensities for an image data;
- obtaining a plurality of compensation gains for a plurality of pixels with respect to the image data, according to a plurality of respective actual backlight intensities, wherein each respective actual backlight intensity is corresponding to one of the pixels of the image data and is determined based on:
- at least two of the backlight duty cycles, which are respectively corresponding to a first backlight source and a second backlight source at least, of the backlight sources, and
- a plurality of backlight intensities corresponding to the pixels, which are measured when the first and the second backlight sources are respectively turned on with corresponding backlight duty cycles;
- and
- compensating a plurality of first image intensities corresponding to the plurality of pixels of the image data according to the plurality of compensation gains, to obtain a plurality of second image intensities;
- and
- a panel, for displaying the image data with the plurality of second image intensities.
Dependencies are inferred from the claim text.