Special filter plate and night viewing compatible backlight optical membrane group

An optical film group and filter technology, applied in the fields of filter, optics, nonlinear optics, etc., can solve the problems of increasing the thickness and weight of the LCD system, reduce the difficulty of design and manufacture, improve work performance, and simplify design. Effect

Active Publication Date: 2009-11-18
中航华东光电有限公司
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AI Technical Summary

Problems solved by technology

Infrared absorption and reflection combined filters are usually combined with infrared absorption and infrared high reflection filters respectively, which increases the thickness and weight of the LCD system

Method used

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  • Special filter plate and night viewing compatible backlight optical membrane group
  • Special filter plate and night viewing compatible backlight optical membrane group
  • Special filter plate and night viewing compatible backlight optical membrane group

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Experimental program
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Embodiment Construction

[0018] The present invention will be further described below in conjunction with specific embodiments and accompanying drawings.

[0019] The first step is to select a commercially available glass substrate 1 that absorbs infrared light and is highly transparent to visible light, such as the KG series glass from SCHOTT or the corresponding glass from Kopper, etc., cut it into the required size, and place it in a coating machine after ultrasonic cleaning. In the vacuum chamber, the designed multilayer interference film 2 can be plated by electron beam evaporation plus ion assist or magnetron sputtering. The glass substrate 1 and the multilayer film 2 together form a special filter 3 . When designing the film system, it can be realized by superimposing the short-wave pass and long-wave pass, and the cut-off area can be determined according to the type of backlight and the specific needs of night vision compatibility. Taking the LED backlight conforming to Class B compatibility (...

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Abstract

The invention discloses a special filter plate and a night viewing compatible backlight optical membrane group. The substrate of the special filter plate is infrared absorption and visible light highly transparent glass, multiple layers of interference films with less number are plated on the filter plate so as to cause the infrared light to be absorbed and reflected simultaneously, furthermore, the color closely approximating to neutral color is kept. To LED backlight and CCFL backlight, the special filter plate can be selected to be close to a backlight and a liquid crystal screen according to needs, thus obtaining the night viewing compatibility with good color consistency within the range with low radiation brightness and wider angle of view; furthermore, the brightness and color of the day and night modes of the LCD can both conform with the use requirement of aviation.

Description

technical field [0001] The invention relates to the field of aviation liquid crystal display, especially a special filter and night vision compatible backlight optical film group, the film group adopts a special infrared cut-off filter, and by adjusting its relative position in the film group The location can get excellent night vision compatibility performance, making the LCD monitor better compatible with the night vision imaging system. Background technique [0002] As an important information display terminal in the aviation field, liquid crystal displays usually emit a large amount of infrared radiation without any processing, which interferes with the normal use of the night vision imaging system (NVIS), and also reduces the contrast or resolution of the NVIS. Pilots experience halos or photoblindness similar to the spotlight effect. [0003] There are usually two ways to achieve night vision compatibility of liquid crystal displays. One is to suppress the generation ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B5/20G02F1/1335
Inventor 吴华夏沈健董戴汪显波史新刚张涛杨新军
Owner 中航华东光电有限公司
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