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

A technology of backlight control and LCD screen, which is applied in the direction of TV, TV system components, electrical components, etc. It can solve the problems of not being able to improve the contrast between light and dark of the backlight partition and the layering of the picture, so as to ensure dynamic clarity and improve Layering, to achieve the effect of frame rate conversion

Active Publication Date: 2016-04-06
HISENSE VISUAL TECH CO LTD
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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 t

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

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Embodiment Construction

[0049]In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only some of the embodiments of the present invention, rather than all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0050] In the embodiment of the present invention, the brightness data of the N image partitions of the current image frame are calculated by the liquid crystal screen backlight control device including the FRC chip, the MCU chip and the backlight driver chip, and the brightness data of the N image partitions The backlight value converted into N backlight partitions is sent to the microcontroller MCU chip; the N backlight partitions are d...

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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...

Claims

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Application Information

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IPC IPC(8): G09G3/34G09G3/36
CPCG09G3/3426G09G2320/064G09G2320/0646G09G2330/021G09G2360/16G09G5/005G09G2340/0435H04N5/7408
Inventor 张玉欣黄顺明曹建伟乔明胜
Owner HISENSE VISUAL TECH CO LTD
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