BRIGHTNESS CONTROL APPARATUS AND BRIGHTNESS CONTROL METHOD
First Claim
1. A brightness control apparatus for performing brightness control on backlights for a display screen based on an input image signal, comprising:
- an image information analysis unit configured to analyze information of at least one item of an average brightness level, brightness histogram information, color histogram information and frequency histogram information that are obtained from an image frame included in the image signal;
a block information obtaining unit configured to divide the image frame into blocks and to obtain image information for each of the blocks based on an analysis result of the image information analysis unit;
a brightness correction unit configured to perform brightness correction on backlights corresponding to each of the blocks divided by the block information obtaining unit; and
a backlight driving control unit configured to perform driving control of the backlights for each of the blocks based on correction information obtained by the brightness correction unit.
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Accused Products
Abstract
A brightness control apparatus for performing brightness control on backlights for a display screen based on an input image signal, includes: an image information analysis unit configured to analyze information of at least one item of an average brightness level, brightness histogram information, color histogram information and frequency histogram information that are obtained from an image frame included in the image signal; a block information obtaining unit configured to divide the image frame into blocks and to obtain image information for each of the blocks based on an analysis result of the image information analysis unit; a brightness correction unit configured to perform brightness correction on backlights corresponding to each of the blocks divided by the block information obtaining unit; and a backlight driving control unit configured to perform driving control of the backlights for each of the blocks based on correction information obtained by the brightness correction unit.
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Citations
8 Claims
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1. A brightness control apparatus for performing brightness control on backlights for a display screen based on an input image signal, comprising:
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an image information analysis unit configured to analyze information of at least one item of an average brightness level, brightness histogram information, color histogram information and frequency histogram information that are obtained from an image frame included in the image signal; a block information obtaining unit configured to divide the image frame into blocks and to obtain image information for each of the blocks based on an analysis result of the image information analysis unit; a brightness correction unit configured to perform brightness correction on backlights corresponding to each of the blocks divided by the block information obtaining unit; and a backlight driving control unit configured to perform driving control of the backlights for each of the blocks based on correction information obtained by the brightness correction unit. - View Dependent Claims (2, 3, 4)
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5. A brightness control method for performing brightness control on backlights for a display screen based on an input image signal, comprising:
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an image information analysis step of analyzing information of at least one item of an average brightness level, brightness histogram information, color histogram information and frequency histogram information that are obtained from an image frame included in the image signal; a block information obtaining step of dividing the image frame into blocks and obtaining image information for each of the blocks based on an analysis result of the image information analysis step; a brightness correction step of performing brightness correction on backlights corresponding to each of the blocks divided by the block information obtaining step; and a backlight driving control step of performing driving control of the backlights for each of the blocks based on correction information obtained by the brightness correction step. - View Dependent Claims (6, 7, 8)
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Specification