3results about How to "Reduce backlight brightness" patented technology

The invention relates to a high-efficiency and energy-saving vehicle-mounted LED backlight source and a control method, and the method comprises the steps: determining the target environment illumination intensity according to the illumination intensity, determining the distortion ratio of a display image according to the product of the driving speed and the target environment illumination intensity, and determining the distortion ratio of the display image according to the distortion ratio and the initial gray value corresponding to each pixel point. Determining a minimum clamping gray value and a maximum clamping gray value, generating a clamping gray value of a first target pixel point, expanding gray value distribution of the image to a preset gray range through linear mapping, determining an expanded gray value of each pixel point in the image, and generating a second target pixel point; and calculating a ratio between the initial gray value of each pixel point and the extended gray value corresponding to each pixel point, and taking a value obtained by performing weighted summation on a product of the ratio corresponding to each pixel point and preset initial LED backlight brightness as target LED backlight brightness. Therefore, the backlight brightness of the LED backlight source is reduced, and the technical effect that the vehicle-mounted display screen is efficient and energy-saving is achieved.

This invention provides a backlight module and a display device, relating to the display field, for improving the display brightness of a display panel in privacy mode. The backlight module includes: a first backlight structure, comprising a first light-emitting structure and a dimming layer located on the side of the first light-emitting structure facing the light-emitting surface of the backlight module; wherein the dimming layer includes multiple microstructures and a reflective barrier, the microstructures including reflective sidewalls, and adjacent microstructures being spaced apart; the reflective barrier being located between the microstructures and the first light-emitting structure, and the orthographic projections of the reflective barrier and the reflective sidewalls overlapping in a direction perpendicular to the plane of the backlight module; and a second backlight structure located on the side of the first backlight structure facing the light-emitting surface of the backlight module.

The application discloses an ambient light self-adaptive liquid crystal display module, which comprises a shell and a panel, and further comprises a sliding rheostat arranged in the shell and used for controlling backlight brightness, a photosensitive resistor arranged on the panel and used for receiving external ambient light, and a comparison controller arranged in the shell and used for controlling the sliding rheostat, which is electrically connected with the sliding rheostat through a first sensor and electrically connected with the photosensitive resistor through a second sensor. The photosensitive resistor, the comparison controller and the two sensors are arranged, the effective resistances of the sliding rheostat and the photosensitive resistor are collected by the sensors in real time, and are converted into electric signals and sent into the comparison controller for comparison. When the difference between the two electric signals is positive, the resistance of the sliding rheostat is controlled to increase the backlight brightness; when the difference between the two electric signals is negative, the resistance of the sliding rheostat is controlled to reduce the backlight brightness, so that the self-adaptive adjustment of the backlight brightness to the ambient light is realized.