BACK LIGHT DRIVING-GEAR, DISPLAY DEVICE EQUIPPED THEREWITH, LIQUID CRYSTAL TELEVISION RECEIVER, AND METHOD FOR DRIVING BACK LIGHT

摘要

PROBLEM TO BE SOLVED: To make it possible to display moving pictures with a high grade while suppressing luminance unevenness and a cost increase.;SOLUTION: The display region of a liquid crystal panel 1 is divided to a plurality of blocks with a plurality of adjacent scanning line groups as one block and the presence or absence of the moving picture by each of the blocks in the images of one vertical period inputted to the liquid crystal panel 1 is detected by a comparison circuit 6, a comparison result storage circuit 7 and a BL waveform control circuit 8. The BL waveform control circuit 8 regulates the wavelength and phase of the driving voltage of the back light 10 within the one vertical period according to the appearance state of the moving picture presence block in the one vertical period. As a result, the moving pictures can be displayed with the high grade while the luminance unevenness and the cost increase are suppressed.;COPYRIGHT: (C)2005,JPO&NCIPI