Liquid crystal display module for double-seat cockpit

Abstract

The invention discloses a liquid crystal display module for a double-seat cockpit. A Fresnel lens is arranged in an optical cavity, anti-reflection treatment is conducted on the surface of a liquid crystal panel, a high-power tricolor LED light source and a low-power tricolor LED light source are adopted, and a driving circuit controls light intensities of high-power LEDs and low-power LEDs of allarea separately. The liquid crystal display module has the advantages that different requirements of users using a night-vision device and users using naked eyes can be met simultaneously, the nightvision compatible requirements can be met, the requirements of watching with naked eyes can be met, on the condition that in the day, midday sunshine directly shines the display screen, the requirements of the users can be met at low power consumption, and energy conservation is better achieved.

Description

technical field [0001] The application relates to the field of liquid crystal display technology, especially a night vision compatible liquid crystal display module used in a two-seater cockpit and meeting the needs of two users at the same time. Background technique [0002] Liquid crystal display has become the mainstream display technology. Displays used in special occasions, such as display modules in aircraft cockpits, have some special requirements. Mainstream display modules cannot meet these special requirements and need further improvement. [0003] In the two-seat cockpit of an aircraft, there are often two operators working at the same time. In the night environment, one user not only needs to observe the environment outside the cockpit through the head-mounted night vision device, but also often watches the content of the display module; the other The user operates with naked eyes and mainly watches the display content of the display module. If a common display...

AI Technical Summary

Problems solved by technology

If a common display module is used, the naked eye user can see the correct image, but the red light and infrared light emitted by the display module interfere with the work of the night vision device, and the user wearing the night vision device cannot see the correct image

In the Chinese patent with the application number CN201510608423.6 and the name "a display device", in order not to interfere with the night vision device, the red light and infrared light emitted by the display module are suppressed. Although this display module will make the night vision device user Satisfied, but naked-eyed users can’t see the correct image, and users can’t get the correct information, which may lead to misoperation and accidents

[0004] In order to enable users to see the content on the display screen under direct sunlight at noon, more than 4,000 LED light sources are used in the Chinese patent application number CN201610089489.3 titled "An Outdoor High-Brightness LCD Screen". Increase the maximum brightness of the display screen, but when a large number of LEDs work at the same time, it will generate a lot of heat, and it is difficult to dissipate heat. Especially in the case of high ambient temperature, the LED itself generates a lot of heat, which makes the internal temperature of the display screen Higher, resulting in a decrease in LED luminous efficiency, shortening the life of the LED, and increasing the failure rate of the circuit

[0005] Currently, the liquid crystal display module used in the two-seat cockpit of an aircraft mainly has the following problems: under the use environment at night, the existing liquid crystal display module of the two-seat cockpit cannot simultaneously meet the needs of the head-mounted night vision device user and the naked-eye user; In the environment of direct sunlight during the day, the power of the liquid crystal display module is too large, it is difficult to dissipate heat, the temperature inside the liquid crystal display module is too high, and the failure rate is high

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