CHROMATICITY CORRECTION DEVICE, CHROMATICITY CORRECTION METHOD, AND DISPLAY DEVICE

摘要

A chromaticity correction device corrects chromaticity of a video signal displayed on a display panel of a display device to correspond to a change in a luminance value of the display panel. The chromaticity correction device includes a luminance detection unit which detects the luminance value, a backlight driving level detection unit which detects a backlight driving level, a temperature detection unit which detects an internal device temperature or an ambient temperature, a reference luminance value calculation unit which estimates a reference luminance value in a characteristic of an initial state, a chromaticity calculation unit which obtains a chromaticity change amount of white point chromaticity and estimated white point chromaticity that is an estimated value of current white point chromaticity, a chromaticity correction value calculation unit which obtains a chromaticity correction value and a chromaticity correction circuit which corrects the chromaticity of the video signal.

主权项

1. A chromaticity correction device that corrects chromaticity of a video signal displayed on a display panel of a display device to correspond to a change in a luminance value of the display panel, the chromaticity correction device comprising:
a luminance detection unit configured to detect the luminance value; a backlight driving level detection unit configured to detect a backlight driving level which is controlling the luminance value; a temperature detection unit configured to detect an internal device temperature or an ambient temperature corresponding to a temperature of the backlight; a reference luminance value calculation unit configured to estimate a reference luminance value in a characteristic of an initial state in the backlight driving level and the temperature; a chromaticity calculation unit configured to obtain a chromaticity change amount of white point chromaticity from the reference luminance value and the luminance value detected by the luminance detection unit and estimated white point chromaticity that is an estimated value of current white point chromaticity from the chromaticity change amount and initial white point chromaticity which is white point chromaticity in the initial state measured in advance; a chromaticity correction value calculation unit configured to obtain a chromaticity correction value from the estimated white point chromaticity and target white point chromaticity set in advance; and a chromaticity correction circuit configured to correct the chromaticity of the video signal using the chromaticity correction value.