Drive method for liquid crystal display device and drive circuit
AssigneesAlps Electric Co., Ltd., LG. Philips LCD Co., Ltd.
InventorTatsumi Fujiyoshi
Life of this patent
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Abstract
There is provided a drive method for a liquid crystal display device in which a line crawling phenomenon is not visually recognized when inversion driving is employed to a liquid crystal display device of a double scanning line system having a lateral-stripe color filter. Polarity inversion is performed every multiple-of-two pixel electrodes such as every two dots, every four dots, . . . , in a direction along a data line, and liquid crystal drive voltages subjected to polarity inversion every two dots controlled by the same data line in a direction along a gate line are applied to pixel electrodes, respectively.
Claims26
A circuit for driving a liquid crystal display coupled to a double scanning line system having a lateral stripe color filter, comprising:
- electrodes arranged in rows and columns;
- a plurality of data lines coupled to adjacent columns of the electrodes, the data lines separating pairs of the electrodes positioned in each row, each pair of the electrodes having gate terminals coupled together;
- a plurality of gate lines coupled to each row of the electrodes, the gate lines separating the pairs of the electrodes in one row from adjacent pairs of electrodes in adjacent rows;
- and
- a control circuit coupled to selected electrodes positioned in a common column, the selected electrodes being an even multiple of electrodes in the common column, the control circuit being configured to supply drains of the selected electrodes with drain voltages having drain polarities by driving an inverting signal through the common data line that alternates the drain polarity of the selected electrodes.
A circuit for driving a liquid crystal display coupled to a double scanning line system having a lateral stripe color filter, comprising:
- electrodes arranged in rows and columns;
- a color filter coupled to each electrode;
- a plurality of data lines coupled to adjacent columns of the electrodes, the data lines separating pairs of the electrodes positioned in each row, each pair of the electrodes having gate terminals coupled together, the electrodes being biased when the drains of the electrodes are supplied with a drain voltage having a drain polarity;
- a plurality of gate lines coupled to each row of the electrodes, the gate lines separating the pairs of the electrodes having biased drains in one row from adjacent pairs of electrodes having unbiased drains positioned in adjacent rows;
- and
- a control circuit coupled to selected electrodes positioned in a common column, the selected electrodes being an even multiple of electrodes in the common column, the control circuit being configured to bias drains of the selected electrodes by driving a signal having an alternating polarity through a common data line that alternates a drain polarity of adjacent selected electrodes.
A method of driving a liquid crystal display display coupled to a double scanning line system having a lateral stripe color filter comprising:
- coupling adjacent sources of electrodes to data lines;
- coupling adjacent gates of the electrodes to gate lines;
- arranging the electrodes into columns;
- and
- alternating a polarity of drains of selected electrodes that are positioned in one column and are coupled to a common data line by driving an inverting signal through the comman data line that alternates the drain polarity of the selected electrodes, the selected electrodes being an even multiple of electrodes along the one column;
- and
- biasing the gates of the selected electrodes by driving a second signal through the gate lines.
A method of driving a liquid crystal display comprising:
- coupling adjacent sources of electrodes to data lines;
- coupling adjacent gates of the electrodes to gate lines;
- arranging the electrodes into columns;
- and
- alternating a polarity of a voltage applied to drains of selected electrodes thereby biasing the selected electrodes, the selected electrodes being positioned in one column, coupled to a common data line, and separated by an electrode within the one column having an unbiased drain;
- wherein the liquid crystal display has a transmittance ratio comprising crest portions alternating between trough portions that traces through at least a single longitudinal axes passing through a plurality of the electrodes.
In a liquid crystal display device of a double scanning line system having a lateral-stripe color filter, comprising a control circuit configured to generate a driving signal coupled to a plurality of electrodes through a signal line, the driving signal having an inverting polarity every multiple-of-two electrodes in a direction of the signal line, the control circuit being further configured to generate a liquid crystal drive voltage having an inverting polarity every two pixel electrodes that bias a plurality of gates of the plurality of electrodes, the liquid crystal drive voltage being applied in a direction of a gate line.
A circuit for driving a liquid crystal display, comprising:
- electrodes arranged in rows and columns;
- a plurality of data lines coupled to adjacent columns of the electrodes, the data lines separating pairs of the electrodes positioned in each row, each pair of the electrodes having gate terminals coupled together;
- a plurality of gate lines coupled to each row of the electrodes, adjacent pairs of the electrodes connected with different gate lines;
- and
- a control circuit configured to supply a drive voltage to drains of diagonally adjacent electrodes connected to a common data line, the control circuit alternating a drain polarity of sets of the diagonally adjacent electrodes disposed an even number of electrodes along the common data line.
Dependencies are inferred from the claim text.