Method of providing data, liquid crystal display device and driving method thereof
AssigneeLG Display Co., Ltd.
InventorJu Young Lee
Life of this patent
Estimating the term…
Abstract
A method of providing data, an LCD and a driving method are disclosed. An image data voltage is inverted. A charge share voltage between the inverted image data voltages is used as a black data. The image data voltage and the black data voltage are applied in sequence, wherein the charge share voltage between the inverted image data voltages is applied as the black data voltage. Thus, motion blurring may be suppressed and manufacturing cost may be reduced because it is unnecessary to generate the black data voltage separately. Also, the typical driving frequency is used even if the black data voltage is used, to reduce cost.
Claims24
A liquid crystal display device comprising:
- a liquid crystal panel comprising a plurality of gate lines and a plurality of data lines crossing each other;
- a data driver that selectively applies image data and charge share voltage data;
- a gate driver that supplies a first scan signal to display the image data and a second scan signal to display the charge share voltage data on the liquid crystal panel;
- and
- a timing controller for generating a first control signal including a gate shift control signal, a gate start pulse and a gate output enable signal and a second control signal including a source shift control signal, a source start pulse and a source output enable signal,
- wherein the data driver comprises a data voltage generator operable to generate the image data and a selection unit operable to select one of the image data or the charge share voltage data,
- wherein the charge share voltage data is generated by shorting the adjacent data lines and has an average voltage value based on the image data,
- wherein the one of the image data or the charge share voltage data is selectable by the source output enable (SOE) signal that controls an output of the data driver,
- wherein the selection unit comprises first switches disposed between the plurality of data lines and second switches different from the first switches disposed along the plurality of data lines, each switch of the first switches respectively coupled with two adjacent data lines of the plurality of data lines and each switch of the second switches respectively coupled in series with each data line of the plurality of data lines, and the first and second switches conversely operate with each other and are controlled by the source output enable (SOE) signal,
- wherein the first scan signal and the second scan signal are sequentially supplied respectively to one gate line among the plurality of gate lines and to another gate line among the plurality of gate lines other than the one gate line.
A method for providing data in a liquid crystal display device including at least a liquid crystal panel and a selection unit, the liquid crystal panel including a plurality of gate lines and a plurality of data lines crossing each other, the selection unit including first switches disposed between the plurality of data lines and second switches different from the first switches disposed along the plurality of data lines, the first and second switches conversely operating with each other, comprising:
- generating image data corresponding to a video signal;
- generating a first control signal including a gate shift control signal, a gate start pulse and a gate output enable signal and a second control signal including a source shift control signal, a source start pulse and a source output enable (SOE) signal;
- generating a first scan signal and a second scan signal by using the first control signal;
- sequentially supplying a first scan signal to one gate line among a plurality of gate lines for displaying the image data and a second scan signal to another gate line other than the one gate line for displaying the charge share voltage data;
- opening the first switches and closing the second switches in response to a low level of the source output enable signal to select the image data;
- closing the first switches and opening the second switches in response to a high level of the source output enable signal to select a charge share voltage data, the charge share voltage data generated by shorting the adjacent data lines and having an average value based on the image data;
- and
- supplying a common voltage to a liquid crystal display panel, wherein an average voltage of all data lines is substantially equal to the common voltage,
- wherein generating the image data comprises inverting the image data at every frame.
A method for driving a liquid crystal display device including at least a liquid crystal panel and a selection unit, the liquid crystal panel including a plurality of gate lines and a plurality of data lines crossing each other, the selection unit including first switches disposed between the plurality of data lines and second switches different from the first switches disposed along the plurality of data lines, the first and second switches conversely operating with each other, comprising:
- supplying a common voltage to a liquid crystal display panel, wherein an average voltage of image data is substantially equal to the common voltage;
- generating a first control signal including a gate shift control signal, a gate start pulse and a gate output enable signal and a second control signal including a source shift control signal, a source start pulse and a source output enable signal;
- generating a first scan signal and a second scan signal by using the first control signal;
- and
- sequentially supplying a first scan signal to one gate line among a plurality of gate lines for displaying the image data and a second scan signal to another gate line other than the one gate line for displaying the charge share voltage data,
- opening the first switches and closing the second switches in response to a low level of the source output enable signal to select the image data;
- closing the first switches and opening the second switches in response to a high level of the source output enable signal to select a charge share voltage data, the charge share voltage data generated by shorting the adjacent data lines and having an average value based on the image data,
- wherein the charge share voltage data comprises a black data and exists between a positive image data and a negative image data.
Dependencies are inferred from the claim text.