DYNAMIC RANGE ADJUSTING METHOD FOR LIQUID CRYSTAL DISPLAY DEVICE, LIQUID CRYSTAL DISPLAY DEVICE, AND ELECTRONIC EQUIPMENT

摘要

PROBLEM TO BE SOLVED: To suppress variation of a dynamic range caused by a gamma compensation characteristic when digital picture data is compensated is compensated by a digital gamma compensation circuit. ;SOLUTION: Digital picture data is compensated by a digital gamma compensation circuit 32, and is made digital picture data being suitable for an applied voltage - transmission characteristic in a liquid crystal display section 50R. Next, the digital picture data is converted into analog picture data by a DA converter 38, further, the analog picture data is amplified by an amplifier 40. And a picture is displayed on the liquid crystal display section 50R based on the analog picture data. At the time, in a digital gamma compensation characteristic, when a gradation value of input digital picture data to the gamma compensation circuit 32 is the maximum and a gradation value of output digital picture data from the gamma compensation circuit 32 is less than the maximum value, an amplitude factor of the amplifier 40 is changed and a dynamic range of a display picture is widened.;COPYRIGHT: (C)1998,JPO