Automatic Brightness Adjustment Method of Airborne Liquid Crystal Display

Abstract

The invention relates to an automatic adjustment method for the brightness of an airborne liquid crystal display in an automatic light adjustment system for an aircraft cockpit. The present invention automatically adjusts the brightness of the airborne display under the all-weather changing light environment. In this method, firstly, the change of the ambient light on the display is judged according to the output value of the low-illuminance and high-illuminance photosensitive sensors on the display; Determine the target brightness of the display, and adjust the current brightness with a brightness change rate that meets the visual requirements of the human eye according to the difference between the target brightness of the display and the current brightness. The invention makes full use of the light and dark adaptability of the human eye to realize the reasonable adjustment of the brightness of the airborne display under the all-weather changing light environment, and makes up for the deficiency that the current display brightness adjustment method cannot well handle light environments such as entering clouds and exiting clouds.

Description

technical field [0001] The invention belongs to the field of aircraft cockpit lighting, in particular to a method for automatically adjusting the brightness of an aircraft-mounted liquid crystal display. Background technique [0002] The task functions of modern large aircraft are continuously strengthened. Correspondingly, the display information related to flight tasks has increased sharply. In order to meet the needs of information display, multiple integrated electronic displays are integrated in the cockpit. During the voyage, it is affected by changes in the dynamic and static light environment such as high-altitude multi-angle high-intensity light irradiation, glare reflected by clouds, and direct horizontal light at dawn / dusk. Including axis rolling, horizontal rolling, vertical rolling or cutting into thick clouds, etc., the brightness of the ambient light irradiated on the display changes in a large span and the speed is very fast. It can be seen that the light env...

AI Technical Summary

Problems solved by technology

However, for occasions where the ambient light brightness varies widely such as entering the cloud, exiting the cloud, and rolling, the existing automatic brightness adjustment method does not perform well, and the ambient light suddenly becomes dark when entering the cloud, and the brightness of the display also suddenly dims. ; When the ambient light suddenly brightens when leaving the cloud, the brightness of the display will also suddenly brighten. The flickering change of the display brightness does not take into account the light and dark adaptation characteristics of the human eye, resulting in the inability to clearly see the display when the ambient light changes significantly. information

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