APPARATUS AND METHOD FOR CONTROLLING LIQUID CRYSTAL DISPLAY BRIGHTNESS, AND LIQUID CRYSTAL DISPLAY DEVICE
First Claim
1. An apparatus for controlling liquid crystal display brightness, the apparatus comprising a memory and one or more processors, wherein one or more computer readable program codes are stored in the memory, and the one or more processors are configured to execute the one or more computer readable program codes to perform:
- determining grayscale value of pixels in a zone image data block under a predetermined rule according to a received image signal;
pre-obtaining a zone backlight value corresponding to the zone image data block according to the grayscale values in the zone image data block;
multiplying the pre-obtained zone backlight value with a backlight value gain coefficient to obtain a backlight value, to which a gain is applied, of a backlight zone corresponding to the zone image data block, wherein the backlight value gain coefficient is more than 1; and
outputting the zone backlight value to a driver circuit of backlight source in the backlight zone to control brightness of the backlight source in the backlight zone as a result of driving.
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Accused Products
Abstract
The disclosure provides an apparatus and method for controlling liquid crystal display brightness, and a liquid crystal display device, where the method includes: determining grayscale values of pixels in a zone image data block under a predetermined rule according to a received image signal; pre-obtaining a zone backlight value corresponding to the zone image data block according to the grayscale values in the zone image data block; multiplying the pre-obtained a zone backlight value with a backlight value gain coefficient to obtain a backlight value to which a gain is applied of a backlight zone, wherein the backlight value gain coefficient is more than 1; and mapping the respective zone backlight values to driver circuits of backlight sources in the corresponding backlight zones.
22 Citations
19 Claims
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1. An apparatus for controlling liquid crystal display brightness, the apparatus comprising a memory and one or more processors, wherein one or more computer readable program codes are stored in the memory, and the one or more processors are configured to execute the one or more computer readable program codes to perform:
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determining grayscale value of pixels in a zone image data block under a predetermined rule according to a received image signal; pre-obtaining a zone backlight value corresponding to the zone image data block according to the grayscale values in the zone image data block; multiplying the pre-obtained zone backlight value with a backlight value gain coefficient to obtain a backlight value, to which a gain is applied, of a backlight zone corresponding to the zone image data block, wherein the backlight value gain coefficient is more than 1; and outputting the zone backlight value to a driver circuit of backlight source in the backlight zone to control brightness of the backlight source in the backlight zone as a result of driving. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method for controlling liquid crystal display brightness, the method comprising:
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determining grayscale values of pixels in a zone image data block under a predetermined rule according to a received image signal; pre-obtaining a zone backlight value corresponding to the zone image data block according to the grayscale value in the zone image data block; multiplying the pre-obtained zone backlight value with a backlight value gain coefficient to obtain a backlight value, to which a gain is applied, of a backlight zone corresponding to the zone image data block, wherein the backlight value gain coefficient is more than 1; and outputting the zone backlight value to a driver circuit of backlight source in the backlight zone to control brightness of the backlight source in the backlight zone as a result of driving. - View Dependent Claims (8, 9, 10, 11, 12, 13)
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14. A liquid crystal display device, comprising:
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a memory configured to store programs and various preset lookup table data; an apparatus for controlling liquid crystal display brightness configured to execute the programs in the memory, and to invoke the various lookup table data according to the executed programs;
to receive an image signal, to process data, and to output image data to a timing controller so that the timing controller generates a driver signal according to the image data to control a liquid crystal panel to display an image; and
to output zone backlight values to a backlight processing component according to the image signal;the backlight processing component configured to determine duty ratios of corresponding PWM signals according to the zone backlight values, and to output the duty ratios to a PWM driver component; and the PWM driver component configured to generate PWM control signals to control backlight sources in backlight zones; wherein the apparatus for controlling liquid crystal display brightness includes a memory and one or more processors, wherein one or more computer readable program codes are stored in the memory, and the one or more processors are configured to execute the one or more computer readable program codes to perform; determining grayscale values in a zone image data block under a predetermined rule according to a received image signal; pre-obtaining a zone backlight value corresponding to the zone image data block according to the grayscale value in the zone image data block; multiplying the pre-obtained zone backlight value with a backlight value gain coefficient to obtain a backlight value, to which a gain is applied, of a backlight zone corresponding to the zone image data block, wherein the backlight value gain coefficient is more than 1; and outputting the zone backlight value to a driver circuit of backlight source in the backlight zone to control brightness of the backlight source in the backlight zone as a result of driving. - View Dependent Claims (15, 16, 17, 18, 19)
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Specification