Impulse driving method and apparatus for LCD
View Patent ↗There is provided an impulse driven LCD which comprises: an LCD drive controller for outputting normal data, adjust data for impulse generation, and a first control signal for controlling the output of the normal or adjust data, and for outputting a second control signal for controlling display of an image signal according to the normal or adjust data; the LCD drive controller includes a scan driver for sequentially outputting first and second scan signals for a 1H period according to application of the second control signal; and an LCD panel for charging the normal data signal to a storage capacitor according to application of the first scan signal, and for charging the adjust data signal to the storage capacitor according to application of the second scan signal.
1. A liquid crystal display (LCD) comprising:
an LCD panel including a plurality of switching devices and a plurality of liquid crystal capacitors;
an LCD drive controller for alternately outputting normal data representing image data and adjust data representing non-image data, and for outputting an output enable signal for selective application of the normal data and the adjust data to the switching devices; and
a gate driver for outputting gate-on signals to the switching devices to be turned-on, pulse width of the gate-on signals being defined by the output enable signal,
wherein the switching devices transmit the applied normal data or the adjust data to the liquid crystal capacitors and the liquid crystal capacitors periodically receive both the normal data and the adjust data.
2. The liquid crystal display of claim 1 , wherein the adjust data is either black data or white data.
3. The liquid crystal display of claim 1 , wherein the LCD drive controller outputs a start horizontal signal for controlling storage of the normal data or the adjust data, and a load signal for instructing to output the normal data or the adjust data.
4. The liquid crystal display of claim 1 , wherein the LCD drive controller outputs a gate clock signal for controlling generation of the gate-on signals and a start vertical signal for controlling starting of the gate-on signals.
5. The liquid crystal display of claim 1 , wherein the gate-on signals include a plurality of pairs of first and second gate-on signals alternately applied to the switching devices, the normal data are applied to the liquid crystal capacitors during the application of the first gate-on signals, the adjust data are applied to the liquid crystal capacitors during the application of the second gate-on signals,
the first gate-on signals and the second gate-on signals are separately applied to each liquid crystal capacitor.
6. The liquid crystal display of claim 5 , wherein the total duration of a pair of the first and second gate-on signals is 1H.
7. The liquid crystal display of claim 6 , wherein the application time of the normal data is about one half of the 1H and the application time of the adjust data is about one half of the 1H.
8. The liquid crystal display of claim 5 , wherein each second gate-on signal is simultaneously applied to a plurality of rows of the switching devices.
9. The liquid crystal display of claim 1 , wherein the LCD drive controller includes a line memory for storing the normal data.
10. The liquid crystal display of claim 9 , wherein the line memory comprises a first line memory for recording data, and a second line memory for outputting data.