Apparatus and method for driving liquid crystal display device
View Patent ↗An apparatus and method for driving a liquid crystal display device are disclosed. The apparatus includes a liquid crystal panel with pixels defined by data and gate lines. A gate driver provides different gate pulses to the odd-column pixels than to the even-column pixels. The gate pulses have different voltages and/or widths. Data drivers provide data voltages having a positive or negative polarity to the data lines. A timing controller controls the gate and data drivers and supplies gate clock pulses that have different voltages and/or widths to the gate driver.
1. An apparatus for driving a liquid crystal display device, comprising:
a liquid crystal panel comprising an image display including a plurality of data lines, a plurality of gate lines, a plurality of pixels having odd-column pixels each of which is connected to a first side of one of the data lines and connected to an associated odd gate line, and even-column pixels each of which is connected to a second side of one of the data lines and connected to an associated even gate lines;
a gate driver that provides different gate pulses to the odd-column pixels than to the even-column pixels, wherein the gate driver provides gate pulses of different widths to the odd-column pixels and the even-column pixels;
a plurality of data drivers that provide data voltages having a positive or negative polarity to the data lines; and
a timing controller that controls the gate driver and the data driver, wherein the timing controller repeatedly generates first and third gate shift clocks having a first width and a first phase delay for one horizontal period, repeatedly generates second and fourth gate shift clocks having a second width different from the first width and a second phase delay for one horizontal period, and supplies the first to fourth gate shift clocks to the gate driver;
wherein the gate driver comprises a first gate driver circuit that provides gate pulses, which have the first width, to the gate lines connected to the odd-column pixels using the first and the third gate shift clocks; and a second gate driver circuit that provides gate pulses, which have the second width, to the gate lines connected to the even-column pixels using the second and the fourth gate shift clocks;
wherein the first width of the gate pulses provided to the odd-column pixels is wider than the second width of the gate pulses provided to the even-column pixels; and
wherein the ratio of the first width to the second width is about 10:7.
2. The apparatus as set forth in claim 1 , wherein the gate pulses provided to the odd-column pixels and the even-column pixels overlap each other.
3. The apparatus as set forth in claim 1 , wherein the data driver reverses the polarity of the data voltages for every horizontal period.
4. The apparatus as set forth in claim 1 , wherein the gate driver is formed on the liquid crystal panel.
5. A method for driving a liquid crystal display device which comprises an image display including a plurality of data lines, a plurality of gate lines, a plurality of pixels having odd-column pixels each of which is connected to a first side of one of the data lines and connected to an associated odd one of the gate lines, and even-column pixels each of which is connected to a second side of one of the data lines and connected to an associated even one of the gate lines, the method comprising:
providing different gate pulses to the odd-column pixels than to the even-column pixels, wherein gate pulses provided to the odd-column pixels have different widths from gate pulses provided to the even-column pixels;
providing data voltages having a positive or negative polarity to each of the data lines in synchronization with the gate pulses;
repeatedly generating first and third gate shift clocks having a first width and a first phase delay for one horizontal period; and
repeatedly generating second and fourth gate shift clocks having a second width different from the first width and a second phase delay for one horizontal period;
wherein supplying the gate pulses having the different widths comprises supplying the gate pulses, which have the first width, to the gate lines connected to the odd-column pixels using the first and the third gate shift clocks; and supplying the gate pulses, which have the second width, to the gate lines connected to the even-column pixels using the second and the fourth gate shift clocks;
wherein the first width of the gate pulses provided to the odd-column pixels is wider than the second width of the gate pulses provided to the even-column pixels; and
wherein the ratio of the first width to the second width is about 10:7.
6. The method as set forth in claim 5 , wherein the gate pulses of the first width overlap the gate pulses of the second width.
7. The method as set forth in claim 5 , wherein the polarity of the data voltage is reversed for every horizontal period.