Liquid crystal screen backlight control device, liquid crystal television and micro control unit (MCU) chip

Abstract

The invention discloses a liquid crystal screen backlight control device, a liquid crystal television and a micro control unit (MCU) chip. The liquid crystal screen backlight control device mainly comprises the components of a frame rate conversion (FRC) chip, the MCU chip which is connected with the FRC chip, and a backlight driving chip which is connected with the MCU chip. The operation process of the liquid crystal screen backlight control device comprises the steps of calculating brightness data of N image sub-areas of a current image frame, converting the brightness data of the N image sub-areas to backlight values of N backlight sub-areas and transmitting the backlight values to the MCU chip; dividing N backlight sub-areas into M backlight areas, searching the gain value which corresponds with each backlight area according to the average value of the backlight values of the backlight sub-areas contained in each backlight area and a preset gain curve, and adjusting the backlight values of the N backlight sub-areas by means of the searched M gain values. Therefore the liquid crystal screen backlight control device, the liquid crystal television and the MCU chip have advantages of searching different gain values for different backlight areas, realizing different-degree light modulation control on the backlight sub-areas, and improving brightness contrast of video data in a displaying process and improving gradation of a displayed picture.

Description

technical field [0001] The invention relates to the technical field of liquid crystal display, in particular to a liquid crystal screen backlight control device, a liquid crystal television and an MCU chip. Background technique [0002] 4K resolution is 4096×2160 pixel resolution, which is 4 times the resolution of 2K projectors and high-definition TVs, and belongs to ultra-high-definition resolution. 4K TV is a TV with 4K resolution. As a new generation of TV products, 4K TV uses a new generation of high-definition 4K technology and a super large screen to clearly and completely show every detail and close-up of the display screen to users. [0003] 4K LCD TVs in 4K TVs usually use Frame Rate Conversion (FRC) technology to achieve resolution and frame rate conversion. However, because the FRC chip is a dedicated video processing chip, its function is relatively simple. Moreover, because the diversity of backlight models determines the diversity of LED drive circuits, if FR...

AI Technical Summary

Problems solved by technology

[0004] The embodiment of the present invention provides a liquid crystal screen backlight control device and a liquid crystal television, which are used to solve the problems existing in the prior art that cannot improve the light and dark contrast of the backlight partition and the layering of the picture.

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