Liquid crystal display device and a method for driving thereof
View Patent ↗A liquid crystal display (LCD) may be described. The LCD can include a source driver; data lines electrically connected to the source driver; switches; connecting lines; a charge share line connecting each switch; a charge share connecting signal emitter that turns each switch on or off via the charge share line; and a thermal sensor that is secured to the LCD apparatus and detects a temperature. Each data line electrically connects to at least one of an LCD pixel, each connecting line electrically connects each pair of the data lines and each connecting line is switched on or off by each switch, the charge share connecting signal emitter turns each switch on and off in each horizontal period when the thermal sensor detects that the temperature is lower than a first predetermined temperature, and the source driver inputs a writing voltage to the plurality of data lines by column inversion.
1. A liquid crystal display (LCD) apparatus comprising:
a source driver;
a plurality of data lines electrically connected to the source driver;
a plurality of switches;
a plurality of connecting lines;
a charge share line connecting the plurality of switches;
a charge share connecting signal emitter that turns the plurality of switches on or off via the charge share line; and
a thermal sensor that is secured to the LCD apparatus and detects a temperature,
wherein each data line of the plurality of data lines electrically connects to at least one of an LCD pixel among a plurality of LCD pixels,
wherein each connecting line of the plurality of connecting lines electrically connects at least two corresponding data lines and each connecting line is switched on or off by each switch of the plurality of switches,
wherein, when the thermal sensor detects that the temperature is lower than the first predetermined temperature, the charge share connecting signal emitter turns on each switch of the plurality of switches during a first period in each horizontal period, and
wherein, when the thermal sensor detects that the temperature is higher than the first predetermined temperature, the charge share connecting signal emitter turns on each switch of the plurality of switches during a second period in each horizontal period, the second period being shorter than the first period.
2. The apparatus of claim 1 , wherein each pair of the data lines comprises a first data line and a second data line, the source driver inputs the writing voltage to the first data line and the second data line, and polarities of the writing voltages in the first data line and the second data line are different from each other.
3. The apparatus of claim 1 , wherein, when the thermal sensor detects that the LCD temperature is lower than the first predetermined temperature, the source driver inputs a white writing voltage corresponding to a white image to the plurality of data lines when the LCD is normally a black type irrespective of an external input image data, and the source driver inputs a black writing voltage corresponding to a black image to the plurality of data lines when the LCD is normally a white type irrespective of an external input image data.
4. The apparatus of claim 3 , wherein the source driver inputs at least one of the white writing voltage and the black writing voltage until the thermal sensor detects that the temperature is higher than the first predetermined temperature.
5. The apparatus of claim 1 , wherein the source driver inputs a writing voltage to the plurality of data lines by column inversion.
6. A method for driving a liquid crystal display (LCD) comprising:
inputting, by a source driver, a writing voltage to a plurality of LCD pixels via a plurality of data lines by column inversion:
detecting, by a thermal sensor secured to the LCD, an temperature; and
turning on, during a first period in a horizontal period by a charge share connecting signal emitter, a plurality of switches via a charge share line when the thermal sensor detects that the temperature is lower than a first predetermined temperature, and turning on, during a second period in a horizontal period by the charge share connecting signal emitter, the plurality of switches via the charge share line when the thermal sensor detects that the temperature is higher than a first predetermined temperature, the second period being shorter than the first period,
wherein the charge share line electrically connects the plurality of switches, and
wherein each connecting line of a plurality of connecting lines electrically connects at least two corresponding data lines and each connecting line is switched on or off by the each switch of the plurality of switches.
7. The method of claim 6 , further comprising, when inputting the writing voltage, the source driver inputs different polarities of the writing voltages to a first data line and a second data line of each pair of the data lines.
8. A liquid crystal display (LCD) apparatus comprising:
a source driver;
a plurality of data lines electrically connected to the source driver;
a plurality of switches;
a plurality of connecting lines;
a charge share line connecting the plurality of switches;
a charge share connecting signal emitter that turns the plurality of switches on or off via the charge share line; and
a thermal sensor that is secured to the LCD apparatus and detects a temperature,
wherein each data line of the plurality of data lines electrically connects to at least one of an LCD pixel among a plurality of LCD pixels,
wherein each connecting line of the plurality of connecting lines electrically connects at least two corresponding data lines and each connecting line is switched on or off by each switch of the plurality of switches,
wherein, when the thermal sensor detects that the temperature is lower than the first predetermined temperature, the charge share connecting signal emitter turns on the plurality of switches m times in one frame,
when the thermal sensor detects that the temperature is higher than the first predetermined temperature, the charge share connecting signal emitter turns on the plurality of switches n times in one frame, where n and m are integer and n is less than m.
9. The apparatus of claim 8 , wherein each pair of the data lines comprises a first data line and a second data line, the source driver inputs the writing voltage to the first data line and the second data line, and polarities of the writing voltages in the first data line and the second data line are different from each other.
10. The apparatus of claim 8 , wherein, when the thermal sensor detects that the LCD temperature is lower than the first predetermined temperature, the source driver inputs a white writing voltage corresponding to a white image to the plurality of data lines when the LCD is normally a black type irrespective of an external input image data, and the source driver inputs a black writing voltage corresponding to a black image to the plurality of data lines when the LCD is normally a white type irrespective of an external input image data.
11. The apparatus of claim 10 , wherein the source driver inputs at least one of the white writing voltage and the black writing voltage until the thermal sensor detects that the temperature is higher than the first predetermined temperature.
12. The apparatus of claim 8 , wherein the source driver inputs a writing voltage to the plurality of data lines by column inversion.