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US 7,023,414 B2Granted
Method and apparatus for driving liquid crystal display
AssigneeLG.Philips LCD Co., Ltd.
InventorYong Sung Ham
Life of this patent
Estimating the term…
Abstract
The present invention discloses a method and apparatus for driving a liquid crystal display device preventing a deterioration of picture quality. More specifically, in the method and apparatus, a difference between modulated data and normal input data is calculated, and the normal input data are modulated by using the difference data calculated.
Claims10
A method of driving a liquid crystal display, comprising steps of:
- setting a modulation data in the liquid crystal display;
- receiving an input data;
- delaying the input data;
- modulating the input data using the modulation data in accordance with the input data and the delayed input data;
- adding the modulated data to the input data;
- subtracting the modulated data from the input data;
- comparing the delayed input data with the input data;
- and
- selecting one of the added data and the subtracted data depending on the compared result.
6 more elements
A method of driving a liquid crystal display, comprising steps of:
- receiving an input data;
- dividing the input data into most significant bits and least significant bits;
- delaying the most significant bits for a frame period;
- modulating the most significant bits using the modulation data in accordance with the most significant bits and the delayed most significant bits;
- adding the modulated data to the non-delayed most significant bits;
- subtracting the modulated data from the non-delayed most significant bits;
- comparing the delayed most significant bits with the non-delayed most significant bits;
- and
- selecting one of the added data and the subtracted data depending on the compared result.
6 more elements
A method of driving a liquid crystal display, comprising:
- determining a data for driving video data normally;
- determining an output data for displaying on the liquid crystal display;
- acquiring a modulation data by calculating differences between the normal data and the output data;
- storing the modulation data in the liquid crystal display;
- and
- receiving an input data;
- dividing the input data into most significant bits and least significant bits;
- delaying the most significant bits for a frame period;
- modulating the most significant bits using the modulation data in accordance with the most significant bits and the delayed most significant bits;
- adding the modulated data to the non-delayed most significant bits;
- subtracting the modulated data from the non-delayed most significant bits;
- comparing the delayed most significant bits with the non-delayed most significant bits;
- and
- selecting one of the added data and the subtracted data depending on the compared result.
11 more elements
A driving apparatus for a liquid crystal display, comprising:
- an input line receiving an input data;
- a frame memory delaying the input data;
- a modulator modulating the input data using the delayed input data;
- an adder adding the modulated data to the input data;
- a subtracter subtracting the modulated data from the input data;
- a comparator comparing the input data with the delayed input data for a frame period;
- and
- a selector selecting one of the added data and the subtracted data depending on the compared result from the comparator.
5 more elements
A driving apparatus for a liquid crystal display, comprising:
- an input line receiving an input data;
- a frame memory delaying most significant bits of the input data;
- a modulator modulating the most significant bits using the delayed most significant bits and the non-delayed most significant bits;
- an adder adding the modulated data to the non-delayed most significant bits;
- a subtracter subtracting the modulated data from the non-delayed most significant bits;
- a comparator comparing the non-delayed most significant bits with the delayed most significant bits;
- and
- a selector selecting one of the added data and the subtracted data depending on the compared result from the comparator.
5 more elements
A driving apparatus for a liquid crystal display, comprising:
- a modulator storing a modulation data predetermined by calculating differences between a data for driving video data normally and an output data for displaying on the liquid crystal display;
- an input line receiving an input data;
- a frame memory delaying most significant bits of the input data;
- an adder adding a modulated data acquired by the modulator using the non-delayed most significant bits and the delayed most significant bits to the non-delayed most significant bits;
- a subtracter subtracting the modulated data from the non-delayed most significant bits;
- a comparator comparing the delayed most significant bits with the non-delayed most significant bits;
- and
- a selector selecting one of the added data and the subtracted data depending on the compared result.
5 more elements
Dependencies are inferred from the claim text.