Display device and driving method thereof according to capturing conditions of an image
AssigneeLG Display Co., Ltd.
InventorsJunwoo Jang, Heeeun Lee
Life of this patent
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Abstract
A display device and a driving method thereof are proposed, the display device including an image conversion apparatus receiving a first image signal from the outside and outputting a second image signal by converting a luminance of the received first image signal; a controller generating image data based on the second image signal; a source driver outputting data signals based on the image data; a display panel including a plurality of sub-pixels that emit light based on the data signals; and a memory, wherein the image conversion apparatus generates the second image signal by converting the luminance of the first image signal in such a manner a to satisfy a reference maximum luminance value stored in the memory.
Claims14
A display device, comprising:
- an image conversion apparatus receiving a first image signal from outside the display device and outputting a second image signal by converting a luminance of the received first image signal;
- a controller generating image data based on the second image signal;
- a source driver outputting data signals based on the image data;
- a display panel including a plurality of sub-pixels that emit light based on the data signals;
- and
- a memory that stores a reference maximum luminance value,
- wherein the image conversion apparatus generates the second image signal by converting the luminance of the first image signal in such a manner to satisfy the reference maximum luminance value,
- wherein the image conversion apparatus calculates a contrast ratio using a first maximum luminance value and a first minimum luminance value, and calculates a conversion coefficient based on the contrast ratio, to convert the luminance of the first image signal according to the conversion coefficient.
A display device, comprising:
- an image conversion apparatus receiving a first image signal from outside the display device and outputting a second image signal by converting a luminance of the received first image signal;
- a controller generating image data based on the second image signal;
- a source driver outputting data signals based on the image data;
- a display panel including a plurality of sub-pixels that emit light based on the data signals;
- and
- a memory that stores a reference maximum luminance value,
- wherein the image conversion apparatus generates the second image signal by converting the luminance of the first image signal in such a manner to satisfy the reference maximum luminance value,
- wherein the image conversion apparatus detects at least one edge from the first image signal and applies a blur mask to the first image signal to relieve the at least one edge,
- wherein the image conversion apparatus converts the first image signal to a gray scale signal and applies a Sobel mask to the gray scale signal to generate boundary data composed of edges for the first image signal,
- wherein the image conversion apparatus detects the at least one edge by projecting the boundary data in a horizontal or vertical direction, and
- wherein the image conversion apparatus applies the blur mask to the first image signal when edges having a length equal to or greater than a predetermined length in the boundary data are repeatedly present within a predetermined distance.
An image conversion method performed in an image conversion apparatus, the method comprising:
- calculating a contrast ratio for a first image signal received from outside the image conversion apparatus;
- converting a luminance of the first image signal in such a manner as to satisfy a reference maximum luminance value while maintaining the contrast ratio;
- and
- generating and outputting a second image signal having the converted luminance,
- wherein the reference maximum luminance value is determined according to characteristic information of a camera capturing an image displayed according to the second image signal.
Dependencies are inferred from the claim text.