Automatic brightness regulating method for aviation airborne liquid crystal display

Abstract

The invention relates to an automatic brightness regulating method for an aviation airborne liquid crystal display. By the automatic brightness regulating method, the brightness of the airborne display can be regulated automatically in an all-weather variable light environment. The automatic brightness regulating method for the aviation airborne liquid crystal display comprises the following steps of judging ambient light variation of the display according to the output value of a low-illumination-level photosensitive sensor and the output value of a high-illumination-level photosensitive sensor on the display; secondly, determining objective brightness of the display according to ambient light variation of the display; and regulating the current brightness of the display according to difference between the objective brightness and the current brightness of the display by brightness change rate meeting requirements of human vision. By the brightness adaptation characteristic and the dark adaptation characteristic of eyes of human bodies, the brightness of the airborne display can be reasonably regulated in the all-weather variable light environment, and the shortcoming that luminous environments such as a cloud environment and a cloud-free environment cannot be handled by the existing display brightness regulating method is overcome.

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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