Method for Improving Night Vision Compatible with Infrared Touch Screen Night Vision Performance

Abstract

The invention provides a method for improving the night vision performance of a night vision compatible infrared touch screen. The method is characterized in that three optical filters are arranged in front of an LED (light emitting diode) infrared light source for forming an optical filter alignment system, the angle effect of the optical filters is utilized for realizing the collimation on the LED infrared light source, the divergence angle of the LED infrared light source is controlled to be within a range being + / -15 degrees, and the near infrared light smaller than 930n is filtered away for improving the night vision compatible performance of the infrared touch screen; the three optical filters can respectively realize the fast drifting of center wavelengths along with the change of the incidence angle, and in addition, at least two optical filters have different center wavelengths; the three optical filters need to be in laminated placement, and in addition, the deviation directions of the second optical filter and the third optical filter relative to the first optical filter are opposite. The method provided by the invention has the advantages that the structure is simple, the scheme is flexible, and the application range is wide.

Description

technical field [0001] The invention relates to a liquid crystal display technology, in particular to an anti-interference display technology of an infrared touch screen under night vision conditions, in particular to a method for improving the night vision performance of a night vision compatible infrared touch screen. Background technique [0002] As we all know, as the cockpit display module of airborne and shipboard, the LCD reinforced display should strictly meet the index requirements for its night vision compatibility. The LED light of the infrared touch screen used in it will radiate light waves that can be detected by the photocathode in the image intensifier, which will interfere with the overall performance of NVIS, and in severe cases will cause glare and other effects on the pilot. It is urgent to improve the night vision compatibility performance of infrared touch screen. In order to improve the night vision compatibility performance of the infrared touch scre...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to invent a method that can greatly improve the night vision performance of night vision compatible infrared touch screens in view of the problems of high cost or poor effect of existing night vision infrared touch screens, and the widespread interference of light waves near 930nm

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