Luminance correction circuit and video display monitor thereof
AssigneeMatsushita Electric Industrial Co., Ltd.
InventorsTetsuro Shiota, Hiroshi Miyai
Life of this patent
Estimating the term…
Abstract
A luminance correction circuit to correct areas of unevenness in luminance or color of a video image and smoothes gaps between correction blocks. The luminance correction circuit comprises a memory for storing correction data for correcting unevenness in luminance or color of video image, a timing generator for controlling read timing of the correction data from the memory, and an analog processor for processing the video signal using the correction data from the memory. A display area is divided to an appropriate number of blocks and the video signal is corrected in each block and the boundary between corrected blocks is smoothed by controlling the correction timing.
Claims14
A luminance correction circuit for use with a video signal corresponding to a video image, said luminance correction circuit comprising:
- means for dividing a display screen into a plurality of areas;
- a correction data generator for generating correction data in each of said areas for correcting at least one of luminance and color level of the video image;
- a timing generator for generating a timing signal for shifting a timing in each field, by shifting the timing of the correction data to read the correction data in each of said areas from said correction data generator;
- and
- a processor for correcting said video image using the correction data from said correction data generator.
A video display monitor for displaying a video signal corresponding to a video image, said video display monitor comprising:
- a luminance correction circuit including;
- means for dividing a display screen into a plurality of areas:
- a correction data generator for generating correction data for correcting at least one of luminance and color level of the video image in each of said areas;
- a timing generator for generating a timing signal for shifting a timing in each field by shifting the timing of the correction data to read the correction data in each of said areas from said correction data generator;
- and
- a processor for correcting said video image using the correction data from said correction data generator,
- wherein said video display monitor displays said video image output from said luminance correction circuit.
A luminance correction circuit for use with a video signal corresponding to a video image, said luminance correction circuit comprising:
- means for dividing a display screen into a plurality of areas:
- a correction data generator for generating correction data in each of said areas for correcting at least one of luminance and color level of the video image;
- a timing generator for generating a timing signal for shifting a timing of at least one of a vertical synchronizing signal and a horizontal synchronizing signal in each field to read the correction data in each of said areas from said correction data generator;
- and
- a processor for correcting said video image using the correction data from said correction data generator based on the timing signal from said timing generator.
A video display monitor for displaying a video signal corresponding to a video image, said video display monitor comprising:
- a luminance correction circuit including;
- means for dividing a display screen into a plurality areas;
- a correction data generator for generating correction data for correcting at least one of luminance and color level of the video image in each of said areas;
- a timing generator for generating a timing signal for shifting a timing of at least one of a vertical synchronizing signal and a horizontal synchronizing signal in each field to read the correction data in each of said areas from said correction data generator;
- and
- a processor for correcting said video image using the correction data from said correction data generator based on the timing signal from said timing generator,
- wherein said video display monitor displays said video image output from said luminance correction circuit.
Dependencies are inferred from the claim text.