Driving system of display screen and driving method thereof

1. A driving system for a display screen, comprising:

a temperature detection circuit, for detecting a temperature of a display area of the display screen;

a compensation calculation circuit, coupled to the temperature detection circuit, for calculating a display voltage compensation control signal based on the temperature and a change relation between the temperature and brightness of the display screen; and

a data driving circuit, coupled to the compensation calculation circuit, for generating a display voltage signal matching the display voltage compensation control signal and transmitting to the display screen, wherein the compensation calculation circuit comprises a sequentially coupled a timing control (TCON) circuit, a gamma selection circuit, and a gamma generating circuit, and the timing control (TCON) circuit is coupled to the temperature detection circuit, and the gamma generating circuit is coupled to the data driving circuit;

wherein the gamma selection circuit comprises:

an association storage, for storing a corresponding relation between a pre-divided temperature range and a gamma voltage associated with the temperature range; and

a voltage searcher, coupled to the timing control (TCON) circuit and the association storage, for searching the temperature range matching the temperature within the association storage, and then searching out the gamma voltage corresponding to the temperature range;

simultaneously, the gamma generating circuit being coupled to the voltage searcher, for generating the gamma voltage as the display voltage compensation control signal;

wherein the gamma voltage corresponding to 40-60° C. is set to a low value; the gamma voltage corresponding to 20-40° C. is set to a median value larger than the low value; and the gamma voltage corresponding to 0-20° C. is set to a high value larger than the median value.

2. The driving system according to claim 1 , wherein the temperature detection circuit measures a temperature value of at least one of pixels on the display screen and calculates an average value of the temperature of the at least one of pixels.

3. The driving system according to claim 1 , wherein the display voltage signal generated to match the display voltage compensation control signal means that the temperature is inversely proportional to the display voltage signal.

4. A method for driving a display screen, comprising:

detecting a temperature of a display area;

calculating a display voltage compensation control signal based on the temperature and a change relation between the temperature and brightness of the display screen; and

generating a display voltage signal matching the display voltage compensation control signal and transmitting to the display screen;

wherein the method for calculating the display voltage compensation control signal of the temperature comprises:

generating a timing control signal;

searching a temperature range matching the temperature within a pre-stored temperature range;

searching out a gamma voltage corresponding to the temperature range, wherein the temperature range and the gamma voltage corresponding to the temperature range are pre-divided and set; and

generating the gamma voltage as the display voltage compensation control signal;

wherein the gamma voltage corresponding to 40-60° C. is set to a low value; the gamma voltage corresponding to 20-40° C. is set to a median value larger than the low value; and the gamma voltage corresponding to 0-20° C. is set to a high value larger than the median value.

5. The method according to claim 4 , wherein the method for detecting the temperature of the display area of the display screen comprises:

measuring a temperature value of at least one of pixels on the display screen;

calculating an average value of the temperature of the at least one of pixels.

6. The method according to claim 4 , wherein the display voltage signal generated to match the display voltage compensation control signal means that the temperature is inversely proportional to the display voltage signal.