Image display control device

Abstract

The invention provides an image display control device, which has the functions of rapidity (real-time performance), low power consumption and circuit scale increasing control, meanwhile, the image display control device can realize the adaptive light attenuation for lighting, and have high precise image correction technology to compensate the image quality worsening due to the light attenuation. The common arithmetic unit(218) is used for calculating the lighting brightness after the light attenuation and the correction coefficient for correctingimage. The common arithmetic unit(218) is regulated with the microcode memorized in the code table(216). In the image correction, the chroma correction is intensified, the chroma reduction causing by the light attenuation is controlled and the flash is prevented with tandem recursive IIR microwave processing. In addition, even the image has low average brightness and high chroma, the light attenuation of lighting is capable of being restricted and the reduction of chroma is able to be controlled.

Description

technical field [0001] The present invention relates to an image display control device and the like. In particular, it relates to an image display control device (image display control LSI) etc. which adaptively dims the brightness of display illumination according to a displayed image and corrects an image signal to compensate for the degradation of image quality caused by the dimming. Background technique [0002] Patent Document 1 discloses a technique of reducing the amount of light emitted from a backlight for power saving and adjusting image data so that the transmittance of a liquid crystal display screen can be increased as much as possible. [0003] Furthermore, Patent Document 2 describes an image correction device that uses a look-up table (LUT) to correct a luminance signal of a displayed image. [0004] Patent Document 1: Japanese Patent Application Laid-Open No. 11-65531 [0005] Patent Document 2: Japanese Patent Laid-Open No. 2004-310671 [0006] In order...

AI Technical Summary

Problems solved by technology

[0007] When a plurality of dedicated hardware is used to perform prescribed calculations in parallel, although fastness (real-time performance) can be ensured, the occupied area of ​​the circuit increases, and at the same time, the power consumption of the circuit also increases.

[0008] In addition, in the above-mentioned Patent Document 1, although only the correction of brightness is considered in the image correction for compensating for the degradation of image quality caused by the dimming of the illumination, the chromaticity of the image is damaged due to the dimming of the illumination. (The vividness of the color), the image quality is greatly reduced, so it is necessary to consider not only the brightness but also the chromaticity of the image correction

[0009] In addition, if control is performed to adaptively determine the dimming amount of the illumination in accordance with the brightness of the displayed image, when the brightness of the displayed image changes rapidly, the illumination brightness may change rapidly accordingly, causing flickering, resulting in degradation of the image quality of the displayed image.

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