Method and device for controlling backlight during entering or quitting wide-screen film display mode

Abstract

The invention discloses a method and a device for controlling backlight during entering or quitting a wide-screen film display mode. The method comprises the steps of determining the first backlight state of a backlight subarea in a display screen when an image to be displayed is displayed on the display screen, determining whether the first backlight state of the backlight subarea is the same with a second backlight state of the backlight subarea when an image one frame prior to the image to the displayed is displayed, and if the first backlight state is different from the second backlight state, setting the backlight luminance value of the backlight subarea according to the first backlight state and the second backlight state so that the backlight luminance value monotonously changes when continuous N frames of images starting from the image to be displayed are displayed in the backlight subarea, wherein N is a positive integer greater than 0. The method for controlling the backlight during entering or quitting the wide-screen film display mode is capable of avoiding backlight blinking occurring when the backlight states are switched a plurality of times.

Description

technical field [0001] The invention relates to the field of backlight source control, in particular to a backlight source control method and device when entering or exiting a wide-screen movie display mode. Background technique [0002] Due to the assembly and fixation of the LCD screen, the frame squeezes the LCD panel, resulting in changes in the arrangement of the four-corner liquid crystal molecules; or the partial unevenness of the display due to the optical film; The decrease in flatness will lead to the light leakage of the liquid crystal when viewing the image content in a black screen or low-brightness scene under weak ambient light viewing conditions, which will damage the image quality. Especially when playing movies with certain ratio formats, such as wide-screen movies, there are black areas in itself; The black area, such as the aspect ratio of the display screen of LCD TV is 16:9, and the aspect ratio of widescreen movie is approximately 21:9, specifically a...

AI Technical Summary

Problems solved by technology

[0005] Embodiments of the present invention provide a backlight control method and device when entering or exiting wide-screen movie display mode, so as to solve the problem in the prior art when images displayed in backlight partitions meet the conditions for turning on and off the backlight multiple times in a short period of time. Issue that causes the display's backlight to flicker

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