ADAPTIVE FEEDBACK CONTROL METHOD OF FSC DISPLAY
First Claim
1. An adaptive feedback control method of a field sequential color (FSC) display, comprising:
- a rearrangement step, wherein gray-scale values of a three primary color field of an input image are converted into gray-scale values of a new three primary color field and a dominated color field (D-field);
a sampling step, wherein a pixel sampling is performed on a resolution of the input image in a sampling interval;
a feedback control step, wherein a pixel by pixel sum operation is performed for each separated color on a color break-up (CBU) color value and a color value of the input image in a Lu′
v′
color space to obtain a color difference sum, and a feedback control is performed at a bit precision on the color difference sum, thereby obtaining a minimum color difference sum; and
a liquid crystal/backlight synchronization step, wherein a liquid crystal signal (LC signal) and a backlight grayscale value of the input image are synchronized according to the minimum color difference sum.
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Abstract
An adaptive feedback control method of a field sequential color display includes: a rearrangement step of converting gray-scale values of a three primary color field of an input image into gray-scale values of a new three primary color field and a dominated color field; a sampling step of performing a pixel sampling on a resolution of the input image in a sampling interval; a feedback control step of performing a pixel by pixel sum operation for each separated color on a color break-up value and a color value of the input image in a Lu′v′ color space to obtain a color difference sum, and performing a feedback control at a bit precision on the color difference sum; and a liquid crystal/backlight synchronization step of synchronizing a liquid crystal signal and a backlight grayscale value of the input image according to the minimum color difference sum.
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Citations
10 Claims
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1. An adaptive feedback control method of a field sequential color (FSC) display, comprising:
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a rearrangement step, wherein gray-scale values of a three primary color field of an input image are converted into gray-scale values of a new three primary color field and a dominated color field (D-field); a sampling step, wherein a pixel sampling is performed on a resolution of the input image in a sampling interval; a feedback control step, wherein a pixel by pixel sum operation is performed for each separated color on a color break-up (CBU) color value and a color value of the input image in a Lu′
v′
color space to obtain a color difference sum, and a feedback control is performed at a bit precision on the color difference sum, thereby obtaining a minimum color difference sum; anda liquid crystal/backlight synchronization step, wherein a liquid crystal signal (LC signal) and a backlight grayscale value of the input image are synchronized according to the minimum color difference sum. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An adaptive feedback control method of a field sequential color (FSC) display, comprising a color difference sum acquisition step and a signal synchronization step, wherein:
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the color difference sum acquisition step comprises; converting an image of a nth frame into a Lu′
v′
color space;sampling on 8 groups of 1-bit backlights and sub-images in a 2×
4 sampling interval to include a CBU image, and performing 8 groups of color break-up (CBU) color difference sum operations synchronously through comparing with an input image;filtering the color difference sums and determining a bit number of a next frame; and considering to be the minimum color difference sum of new 7 sets of 2-bit groups from each two adjacent 1-bit groups of color backlight having minimum a color difference sum respectively; and the signal synchronization step comprises; processing a liquid crystal signal (LC signal) of the input image by a frame buffer, so as to obtain a LC signal of a (n−
1)th frame;processing a minimum CBU color difference sum of a color backlight by a backlight buffer (BL buffer), so as to obtain a backlight gray-scale value of the (n−
1)th frame; andusing a lookup table (LUT) to generate a new LC gray-scale value through using the synchronized LC signal and backlight gray-scale value of the (n−
1)th frame. - View Dependent Claims (8, 9, 10)
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Specification