Driving method of lcd device and driving system

Abstract

A driving method of a liquid crystal display (LCD) device includes a step A and a step B. In the step A, using frequency conversion on a received source image signal when a type of the received source image signal is different from a preset target frequency, and converting a display frequency of the received source image signal into a target frequency, generating a target image signal based on the target frequency. In the step B, performing an overvoltage drive output using an overvoltage driving table matching with the target frequency of the target image signal.

We claim: 
     
         1 . A driving method of a liquid crystal display (LCD) device, comprising:
 A: using frequency conversion on a received source image signal when a type of the received source image signal is different from a preset target frequency, and converting a display frequency of the received source image signal into a target frequency of 65 Hz, generating a target image signal based on the target frequency of 65 Hz; and   B: performing an overvoltage drive output using an overvoltage driving table matching with the target frequency of the target image signal;   in the step A,   if frequency of the received source image signal is lower than the target frequency, generating a new frame picture, evenly inserting the new frame pictures among frame pictures of the source image signal in a frequency cycle to generate a new image signal, wherein a frequency of the new image signal being same as the target frequency;   if the frequency of the source image signal is greater than the target frequency, selecting partial pictures from the source image signal, and discarding the selected partial pictures, wherein the selected discarded partial pictures are evenly extracted from the frame pictures of the source image signal in one frequency cycle of the source image signal.   
     
     
         2 . A driving method of a liquid crystal display (LCD) device, comprising:
 A: using frequency conversion on a received source image signal when a type of the received source image signal is different from a preset target frequency, and converting a display frequency of the received source image signal into a target frequency, generating a target image signal based on the target frequency; and   B: performing an overvoltage drive output using an overvoltage driving table matching with the target frequency of the target image signal.   
     
     
         3 . The driving method of the liquid crystal display (LCD) device of  claim 2 , wherein the target frequency is greater than 45 Hz. 
     
     
         4 . The driving method of the liquid crystal display (LCD) device of  claim 3 , wherein the target frequency is greater than 60 Hz. 
     
     
         5 . The driving method of the liquid crystal display (LCD) device of  claim 4 , wherein the target frequency is 65 Hz. 
     
     
         6 . The driving method of the liquid crystal display (LCD) device of  claim 2 , wherein in the step A, if frequency of the received source image signal is lower than the target frequency, generating a new frame picture, and inserting the new picture into the source image signal to generate a new image signal, wherein a frequency of the new image signal being same as the target frequency. 
     
     
         7 . The driving method of the liquid crystal display (LCD) device of  claim 6 , wherein in the step A, the new frame pictures are evenly inserted among frame pictures of the source image signal in one frequency cycle of the source image signal. 
     
     
         8 . The driving method of the liquid crystal display (LCD) device of  claim 6 , wherein the new frame pictures inserted into the source image signal are a totally black picture, a totally white picture, an action detection compensation picture generated by computation, a previous-frame picture, or a next-frame picture. 
     
     
         9 . The driving method of the liquid crystal display (LCD) device of  claim 2 , wherein in the step A, if frequency of the source image signal is greater than the target frequency, selecting partial pictures from the source image signal, and discarding the selected partial pictures. 
     
     
         10 . The driving method of the liquid crystal display (LCD) device of  claim 9 , wherein in the step A, the selected discarded partial pictures are evenly extracted from the frame pictures of the source image signal in one frequency cycle. 
     
     
         11 . A driving system of a liquid crystal display (LCD) device, comprising:
 a conversion module converting a source image signal having a different frequency from a target frequency into a preset target frequency, wherein the driving system of the LCD device uses one overvoltage driving table matching with the target frequency.   
     
     
         12 . The driving system of the liquid crystal display (LCD) device of  claim 11 , wherein the conversion module comprises a buffering module and a picture compensation module connected with the buffering module. 
     
     
         13 . The driving system of the liquid crystal display (LCD) device of  claim 12 , wherein the buffering module is configured with a buffer controller of two pictures, a buffering memory connected with the buffer controller, and a fixed frequency clock. 
     
     
         14 . The driving system of the liquid crystal display (LCD) device of  claim 12 , wherein the compensation module comprises a compensator, a static buffering memory connected with the compensator, a buffer, a compensation picture counter, and a data output port respectively connected with the buffer, the compensator, and the compensation picture counter. 
     
     
         15 . The driving system of the liquid crystal display (LCD) device of  claim 11 , wherein the driving system further comprises an image signal determination module determining a type of the source image signal.