LED display brightness automatic adjustment system and method

Abstract

The invention discloses an automatic regulation system for the brightness of an LED display screen. The system comprises a brightness detection device which comprises a lens group, a multi-pixel sensor mounted on a focal plane of the lens group, as well as an image analysis and feature extraction unit connected with the multi-pixel sensor, wherein the screen brightness and the background brightness can be detected through the brightness detection device, the optimal comparison value of the screen brightness and the background brightness is calculated, and whether the brightness is required to regulate is determined; and a control signal is transmitted to a brightness controller, so that the brightness control is achieved. The automatic regulation system can improve visual comfort level and identification capacity of an observer effectively, can further save electrical quantity, and prolong the service life of the LED display screen. The invention further discloses an automatic regulation method for the brightness of the LED display screen. The method can achieve the mechanism for simulating human eye focusing and imaging, and achieve the detection of the display screen and environment brightness more accurately, thereby regulating the brightness accurately.

Description

technical field [0001] The invention relates to a technology for automatically adjusting the brightness of an LED display screen, in particular to a system and method for automatically adjusting the brightness of an LED display screen. Background technique [0002] When the large-screen LED display installed outdoors is in use, due to the constant changes in the external environment illumination, in order to ensure that observers can watch comfortably, it is necessary to dynamically adjust the brightness of the LED display. At present, there are usually the following two ways to automatically adjust the brightness of the LED display. [0003] Method 1: Set a schedule in the host computer, arrange several switching time points in the table, and each switching time point corresponds to the preset working brightness of an LED display. The host computer continuously reads the local time and compares the switching time point in the schedule. When the local time reaches the switc...

AI Technical Summary

Problems solved by technology

When using this method, although a wide-angle or multi-view illuminance sensor can be used for multi-point illuminance detection, since the illuminance sensor does not simulate the audience observing the screen, the acquired illuminance value is not the contrast of the screen brightness relative to the background brightness

Therefore, this adjustment method cannot directly reflect the audience's perception of the visual contrast of the screen, so the brightness of the adjusted LED display still cannot meet the audience's comfortable viewing requirements.

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