Patent ID: 8194104
Filing Date: 2012-06-05
Classification: G09G

Abstract:
1. A liquid-crystal display device comprising: a liquid-crystal display panel in which each of pixels is divided into a first subpixel and a second subpixel; a driving circuit for driving the liquid-crystal panel; and a drive control circuit for controlling the driving of the liquid-crystal display panel by using the driving circuit, wherein the drive control circuit includes a first subpixel driving level converter for, on the basis of the gradation value of each pixel of an input video signal, obtaining a first gradation value for driving the first subpixel of the liquid-crystal display panel, a first luminance value converter for converting a gradation value for driving the first subpixel, the gradation value being converted by the first subpixel driving level converter, into a luminance value, a second luminance value converter for converting the gradation value of each pixel of the input video signal into a luminance value, a subtraction unit for calculating a difference between the luminance value converted by the second luminance value converter and the luminance value converted by the first luminance value converter, and a second subpixel driving level converter for converting the luminance value of the difference subtracted by the subtraction unit into a gradation value and obtaining a second gradation value for driving the second subpixel of the liquid-crystal display panel, the second gradation value for driving the second subpixel being obtained by selecting a subset of a plurality of multiplication circuits that perform distinct power calculations on the gradation value using a single value of n, the power calculations using powers of the single value of n, which is specified by a control signal from a processor, wherein at least the second gradation value is used to achieve a target characteristic for at least one of the pixels.