Driving method and device for flat panel display
AssigneeLG Electronics Inc.
InventorsHwan Yu Kim, Byung Soo Song
Life of this patent
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Abstract
The present invention relates to a driving device for a flat panel display and driving method of, capable of enhancing an image quality. In the present invention, a gray level of an original image is rearranged using the minimal distribution lower and upper gray levels determined using a histogram. The present invention provides the means to solve an excessive change of color that can be generated when rearranging the gray level of the original image, an image display deterioration due to the low gray level area and a saturation of the high gray level area.
Claims63
A driving method for a flat panel display, the driving method comprising the steps of:
- (a) removing a predetermined gray level area from an original image using a histogram;
- and
- (b) rearranging the original image using the remaining gray level areas except the removed gray level area.
A driving method for a flat panel display comprising the steps of:
- (a) determining minimal distribution lower and upper gray levels of an original image using a histogram;
- and
- (b) rearranging the original image using the minimal distribution lower and upper gray levels.
A driving method for a flat panel display, the driving method comprising the steps of:
- (a) determining minimal distribution lower and upper gray levels of an original image using a histogram;
- (b) calculating a motion amount using the original image and an one frame-delayed original image;
- and
- (c) rearranging a gray level of the one frame-delayed original image using the motion amount and the minimal distribution lower and upper gray levels.
A driving method for a flat panel display, the driving method comprising the steps of:
- (a) determining minimal distribution lower and upper gray levels for an original image using a histogram;
- (b) calculating a motion amount using the original image and a one frame-delayed original image;
- (c) detecting a degree of a same gray level distribution for an original image;
- (d) re-determining the minimal distribution lower and upper gray levels using the motion amount and the same gray level distribution;
- and
- (e) rearranging a gray level of the one frame-delayed original image using the minimal distribution lower and upper gray level.
A driving method for a flat panel display, the driving method comprising the steps of:
- (a) calculating a motion amount using the original image and a one frame-delayed original image;
- (b) determining minimal distribution lower and upper gray levels using a histogram;
- (c) determining whether the minimal distribution lower gray level is equal to or greater than an expressible critical value;
- and
- (d) rearranging a gray level of the one frame-delayed original image using a modified gamma table when the minimal distribution lower gray level is equal to or greater than the expressible critical value.
A driving method for a flat panel display, the driving method comprising the steps of:
- (a) determining minimal distribution lower and upper gray levels using a histogram;
- (b) rearranging a one frame-delayed original image using gray levels existing between the minimal distribution lower and upper gray levels;
- (c) performing a gamma correction to generate an output gray level with respect to a gray level of the rearranged original image;
- and
- (d) applying to a gamma output curve, a peak compensation value determined according to a comparison of a gamma compensated output gray level with an output gray level of a predetermined period delayed original image from the one frame-delayed original image.
A driving method for a flat panel display, the driving method comprising the steps of:
- (a) calculating an average brightness level of an original image;
- (b) selecting a gamma curve according to the average brightness level;
- and
- (c) correcting gray level of one frame-delayed original image using the selected gamma curve.
A driving device for a flat panel display, the driving device comprising:
- a gray level removing means for removing a predetermined gray level area of an original image using a histogram;
- and
- a rearranging means for rearranging the original image using the remaining gray level areas except for the removed gray level area.
A driving device for a flat panel display, the driving device comprising:
- a minimal distribution lower and upper gray level determining means for determining minimal distribution lower and upper gray levels of an original image using a histogram;
- and
- a rearranging means for rearranging a gray level of the original image using the minimal distribution lower and upper gray levels.
A driving device for a flat panel display, the driving device comprising:
- a minimal distribution lower and upper gray level determining means for determining minimal distribution lower and upper gray levels of an original image using a histogram;
- and
- a calculating means for calculating a motion amount using the original image and a one frame-delayed original image;
- and
- a rearranging means for rearranging a gray level of the one frame-delayed original image using the motion amount and the minimal distribution lower and upper gray levels.
A driving device for a flat panel display, the driving device comprising:
- a minimal distribution lower and upper gray level determining means for determining minimal distribution lower and upper gray levels of an original image using a histogram;
- a motion amount calculating means for calculating a motion amount using the original image and a one frame-delayed original image;
- a same gray level distribution detecting means for detecting a degree of a same gray level distribution for an original image;
- a minimal distribution lower and upper gray level re-determining means for re-determining the minimal distribution lower and upper gray levels using the motion amount and the same gray level distribution;
- and
- a rearranging means for rearranging a gray level of the one frame-delayed original image using the minimal distribution lower and upper gray levels.
A driving device for a flat panel display, the driving device comprising:
- a calculating means for calculating a motion amount using the original image and a one frame-delayed original image;
- a minimal distribution lower and upper gray level determining means for determining minimal distribution lower and upper gray levels using a histogram;
- a minimal distribution lower gray level determining means for determining whether the minimal distribution lower gray level is equal to or greater than an expressible critical value;
- and
- a rearranging means for rearranging a gray level of the one frame-delayed original image using a modified gamma table when the minimal distribution lower gray level is equal to or greater than the expressible critical value.
A driving device for a flat panel display, the driving device comprising:
- a minimal distribution lower and upper gray level determining means for determining minimal distribution lower and upper gray levels using a histogram;
- a rearranging means for rearranging a one frame-delayed original image using gray levels existing between the minimal distribution lower and upper gray levels
- a gamma correcting means for performing a gamma correction to generate output gray levels with respect to a gray level of the rearranged original image;
- and
- a peak compensating means for applying to a gamma output curve, a peak compensation value determined according to a comparison of a gamma compensated output gray level with an output gray level of a predetermined period delayed original image from the one frame-delayed original image.
A driving device for a flat panel display, the driving device comprising:
- a mean brightness level calculating means for calculating an average brightness level of an original image;
- a gamma curve selecting means for selecting a gamma curve according to the mean brightness level;
- and
- a gray level correcting means for correcting gray level of one frame-delayed original image using the selected gamma curve.
Dependencies are inferred from the claim text.