Driving device and display apparatus having the same
AssigneeSamsung Display Co., Ltd.
InventorWoo-Chul Kim
Life of this patent
Estimating the term…
Abstract
In a driving device and a display apparatus having the driving device, a converter converts input image data and outputs first and second sub-image data which have different values. A first compensator compensates the first sub-image data and outputs a first compensated image data, and a second compensator compensates the second sub-image data and outputs a second compensated image data. An output circuit controls output time of the first and second compensated image data. Accordingly, sub-image data for each sub-pixel may be exactly compensated by employing compensators to individually compensate for the sub-image data of each sub-pixel.
Claims21
A driving device for driving a liquid crystal display device, the liquid crystal display device including a pixel that includes a first sub-pixel and a second sub-pixel, the driving device comprising:
- a converter converting input image data for the pixel into first sub-image data for the first sub-pixel and second sub-image data for the second sub-pixel;
- a memory unit coupled to the converter and comprising:
- a first data memory storing first present sub-image data, which is first sub-image data of a present frame, and outputting first previous sub-image data, which is first sub-image data of a previous frame;
- and
- a second data memory storing second present sub-image data, which is second sub-image data of a present frame, and outputting second previous sub-image data, which is second sub-image data of a previous frame;
- a compensator unit coupled to the memory unit and compensating the first and second present sub-image data based on the first and second previous sub-image data and the first and second present sub-image data to generate first and second compensated sub-image data, the compensator unit comprising:
- a first compensator part compares a first reference value with a differential value between the first sub-image data and the first previous sub-image data and outputs the first compensated sub-image data based on a result of the comparison, and
- a second compensator part compares a second reference value with a differential value between the second sub-image data and the second previous sub-image data and outputs the second compensated sub-image data based on a result of the comparison;
- and
- an output circuit that controls at least one of an output time of the first compensated sub-image data and an output time of the second compensated sub-image data,
- wherein the first reference value is different from the second reference value.
A liquid crystal display device displaying an image, the liquid crystal display device comprising:
- a display panel including a pixel, the pixel including a first sub-pixel and a second sub-pixel;
- and
- a driving device for driving the display panel;
- the driving device comprising:
- a converter converting input image data for the pixel into first sub-image data for the first sub-pixel and second sub-image data for the second sub-pixel;
- a memory unit coupled to the converter and comprising:
- a first data memory storing first present sub-image data, which is first sub-image data of a present frame, and outputting first previous sub-image data, which is first sub-image data of a previous frame;
- and
- a second data memory storing second present sub-image data, which is second sub-image data of a present frame, and outputting second previous sub-image data, which is second sub-image data of a previous frame;
- a compensator unit coupled to the memory unit and compensating the first and second present sub-image data based on the first and second previous sub-image data and the first and second present sub-image data to generate first and second compensated sub-image data, the compensator unit comprising:
- a first compensator part compares a first reference value with a differential value between the first sub-image data and the first previous sub-image data and outputs the first compensated sub-image data based on a result of the comparison, and
- a second compensator part compares a second reference value with a differential value between the second sub-image data and the second previous sub-image data and outputs the second compensated sub-image data based on a result of the comparison;
- and
- an output circuit that controls at least one of an output time of the first compensated sub-image data and an output time of the second compensated sub-image data,
- wherein the first reference value is higher than the second reference value.
A method for driving a liquid crystal display device, the liquid crystal display device including a pixel, the pixel including a first sub-pixel and a second sub-pixel, the method comprising:
- converting previous input image data for the pixel into first previous sub-image data for the first sub-pixel and second previous sub-image data for the second sub-pixel in a previous frame;
- converting present input image data for the pixel into first present sub-image data for the first-sub pixel and second present sub-image data for the second sub-pixel in a present frame;
- compensating the first present sub-image data based on a result of comparison with a first reference value and a differential value between the first sub-image data and the first previous sub-image data to generate first compensated sub-image data;
- compensating the second present sub-image data based on a result of comparison with a second reference value and a differential value between the second sub-image data and the second previous sub-image data to generate second compensated sub-image data;
- outputting the first compensated sub-image data and the second compensated sub-image data;
- and
- controlling at least one of an output time of the first compensated sub-image data and an output time of the second compensated sub-image data,
- wherein the first reference value is higher than the second reference value.
Dependencies are inferred from the claim text.