Backlight brightness automatic adjusting system suitable for different liquid crystal panels and liquid crystal display with backlight brightness automatic adjusting system

Abstract

The invention provides a backlight brightness automatic adjusting system suitable for different liquid crystal panels and a liquid crystal display with the backlight brightness automatic adjusting system. The backlight brightness automatic adjusting system suitable for different liquid crystal panels performs data interaction with the liquid crystal panel (10) through a timing controller (20). The timing controller (20) detects the configuration or resolution information of the liquid crystal panel (10), and furthermore transmits the configuration or resolution information of the liquid crystal panel (10) to a microcontroller (30) in an instruction manner. The microcontroller (30) correspondingly outputs pulse signals with different duty ratios according to different instruction obtained from the timing controller (20) for controlling on degree of an MOS tube (Q), thereby automatically adjusting current which flows over an LED lamp strip (40) and brightness of the LED lamp strip (40), realizing automatic backlight brightness adjustment according to different liquid crystal panels which match the backlight, saving working hours and manpower consumed in replacing a rectifier or updating program codes of the microcontroller, and realizing automation.

Description

technical field [0001] The invention relates to the technical field of liquid crystal display, in particular to a backlight brightness automatic adjustment system and a liquid crystal display adapted to different liquid crystal panels. Background technique [0002] Liquid Crystal Display (LCD) has many advantages such as thin body, power saving, and no radiation, and has been widely used, such as: LCD TV, mobile phone, personal digital assistant (PDA), digital camera, computer screen or notebook computer screen etc. [0003] Most of the liquid crystal displays currently on the market are backlight liquid crystal displays, which include a liquid crystal panel and a backlight module (Backlight Module). The working principle of the liquid crystal panel is to apply a driving voltage on the thin film transistor array substrate (ThinFilmTransistorArraySubstrate, TFTArraySubstrate) and the color filter substrate (ColorFilter, CF) to control the rotation direction of the liquid cry...

AI Technical Summary

Problems solved by technology

[0007] At present, different types of LCD panels have different resolutions and light transmittances, so different LCD panels require different backlight brightness. When the backlight system corresponds to LCD panels with different resolutions and different light transmittances, it is necessary to replace the rectifier Or write new program codes to the microcontroller to obtain suitable optical brightness for matching with different LCD panels, which will undoubtedly increase the cost and make the quality control of LCD displays more cumbersome

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