Apparatus and method for driving small-sized LCD device
First Claim
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1. An apparatus for driving a liquid crystal display (LCD) panel of an LCD device, the apparatus comprising:
- a compensation unit, which compensates for first image data with reference to a predetermined lookup table (LUT), which includes a plurality of sub-LUTs for a plurality of pixel data of the first image data, in response to a first input control signal in a first mode, the first image data being consecutively input to the apparatus, the compensation unit having a LUT unit, which stores the predetermined LUT, searches the predetermined LUT for a compensation value, by which the current frame of the first image data is to be compensated for, with reference to the current frame and a frame of the first image data previously input to the apparatus, and outputs the searched compensation value, the frame being referred to as a previous frame, and the LUT unit having a plurality of sub-LUT units, which store the plurality of sub-LUTs for the plurality of pixel data of the first image data, search the sub-LUTs for compensation values for the pixel data of the first image data with reference to pixel data of the current frame of the first image data and pixel data of the previous frame of the first image data, and output the searched compensation values;
a storage unit, which updates and then stores the first image data and second image data and outputs one of the first image data or the second image data in response to a second input control signal, the second image data being consecutively input to the apparatus;
an output unit, which outputs one of the first image data, the second image data, or the compensated first image data in response to an output control signal; and
a control unit, which generates the first input control signal, the second input control signal, and the output control signal in response to a predetermined control signal.
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Abstract
An apparatus and method for driving a small-sized or low-powered liquid crystal display (LCD) device are provided to reduce the amount of energy consumed in driving the LCD device while displaying a high-quality moving image on a small-sized LCD panel without distortion such as tailing or blurriness, where the apparatus includes a compensation unit, a storage unit, an output unit, and a control unit.
17 Citations
23 Claims
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1. An apparatus for driving a liquid crystal display (LCD) panel of an LCD device, the apparatus comprising:
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a compensation unit, which compensates for first image data with reference to a predetermined lookup table (LUT), which includes a plurality of sub-LUTs for a plurality of pixel data of the first image data, in response to a first input control signal in a first mode, the first image data being consecutively input to the apparatus, the compensation unit having a LUT unit, which stores the predetermined LUT, searches the predetermined LUT for a compensation value, by which the current frame of the first image data is to be compensated for, with reference to the current frame and a frame of the first image data previously input to the apparatus, and outputs the searched compensation value, the frame being referred to as a previous frame, and the LUT unit having a plurality of sub-LUT units, which store the plurality of sub-LUTs for the plurality of pixel data of the first image data, search the sub-LUTs for compensation values for the pixel data of the first image data with reference to pixel data of the current frame of the first image data and pixel data of the previous frame of the first image data, and output the searched compensation values; a storage unit, which updates and then stores the first image data and second image data and outputs one of the first image data or the second image data in response to a second input control signal, the second image data being consecutively input to the apparatus; an output unit, which outputs one of the first image data, the second image data, or the compensated first image data in response to an output control signal; and a control unit, which generates the first input control signal, the second input control signal, and the output control signal in response to a predetermined control signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. An apparatus for driving a liquid crystal display (LCD) panel of an LCD device, the apparatus comprising:
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a compensation unit, which compensates for first image data with reference to a predetermined lookup table (LUT), which includes a plurality of sub-LUTs for a plurality of pixel data of the first image data, in response to a first input control signal in a first mode, the first image data being consecutively input to the apparatus; a storage unit, which updates and then stores the first image data and second image data and outputs one of the first image data or the second image data in response to a second input control signal, the second image data being consecutively input to the apparatus; an output unit, which outputs one of the first image data, the second image data, or the compensated first image data in response to an output control signal; and a control unit, which generates the first input control signal, the second input control signal, and the output control signal in response to a predetermined control signal, wherein the compensation unit comprises; and input controller, which determines whether to receive a frame of the first image data currently being input to the apparatus in response to the first input control signal, the frame being referred to as a current frame; a LUT unit, which stores the predetermined LUT, searches the predetermined LUT for a compensation value, by which the current frame of the first image data is to be compensated for, with reference to the current frame and a frame of the first image data previously input to the apparatus, and outputs the searched compensation value, the frame being referred to as a previous frame; and a compensation calculator, which generates the compensated first image data based on the current frame, the previous frame, and the compensation value, wherein the compensation calculator comprises; a calculator, which performs a predetermined operation on the current frame of the first image data and the compensation value in response to a compensation control signal; and a compensation controller, which generates the compensation control signal based on the current frame and the previous frame of the first image data, wherein the calculator comprises a plurality of sub-calculators, which compensate for the pixel data of the current frame of the first image data by performing a predetermined operation on the pixel data of the current frame of the first image data with the respective compensation value. - View Dependent Claims (16, 17, 18)
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19. A method of driving a liquid crystal display (LCD) panel of a LCD device, the method comprising:
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storing a predetermined lookup table (LUT); storing first image data and second image data, which are consecutively input; searching the predetermined LUT for a LUT compensation value, by which a current frame of the first image data is to be compensated with reference to the current frame and a previous frame of the first image data previously input to the apparatus; outputting the searched LUT compensation value; compensating for the first image data with reference to LUT, which includes a plurality of sub-LUTs for a plurality of pixel data of the first image data, based on a result of comparing the current frame of the first image data with a previous frame of the first image data and delaying and then outputting the compensated first image data in a first mode; storing the plurality of sub-LUTs for the plurality of pixel data of the first image data; searching the sub-LUTs for sub-LUT compensation values for the pixel data of the first image data with reference to pixel data of the current frame of the first image data and pixel data of the previous frame of the first image data; outputting the searched sub-LUT compensation values; outputting the stored first image data in a second mode; outputting the stored second image data in a third mode; and delaying and then outputting the first image data in a fourth mode. - View Dependent Claims (20, 21, 22, 23)
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Specification