Driving method, compensation processor and driver device for liquid crystal display

摘要

The invention relates to a driving method, compensation processor and driver device for liquid crystal display. The driving method includes steps of receiving data signal of a present frame; obtaining an average brightness value of the present frame; comparing the previous frame with the present frame, and when the difference between the average brightness values is larger than or equal to a set threshold, generating at least two back light driver pulse signals of which the duty ratios gradually changing, and outputting them to drive the back lights. The compensation processor includes a data analysis module, a data compensation module, a back light linear filtering module and a pulse generator module. The driver device employs the compensation processor of the present invention. The present invention employs the technical means of generating a plurality of back light driver pulse signals, realizes the gradual changing of the brightness of the back lights, and overcomes the picture flickering problem due to the sudden changing of the brightness of the back lights, thus improving the display effect of the LCD.

主权项

1. A driving method for LCD, characterized in that comprising:
Step 1 of receiving data signal of a present frame, making spectrum analysis on the data signal, and obtaining and recording an average brightness value of the present frame; Step 2 of acquiring the average brightness value of the present frame, and querying an average brightness value of the previous frame to compare with the average brightness value of the present frame; Step 3 of when the result of the comparison is that the difference between the average brightness value of the previous frame and the average brightness value of the present frame is larger than or equal to a set threshold, generating a pulse generation instruction indicating to generate, during the present frame, at least two back light driver pulse signals in sequence, wherein the relation between the duty ratios of the respective back light driver pulse signals in the at least two back light driver pulse signals to be generated during the present frame is a unidirectional gradual changing relative to time, and the direction of the unidirectional gradual changing relative to time is the same as the direction of the gradual changing of the average brightness value of the previous frame relative to the average brightness value of the present frame; and Step 4 of generating the at least two back light driver pulse signals during the present frame according to the pulse generation instruction, and outputting each of the at least two back light driver pulse signals in sequence during the present frame to drive the back lights.