Backlight module for limiting visual angles of LCD (Liquid Crystal Display) screen
A backlight module, LCD screen technology, applied in optics, light guides, light sources, etc., can solve the problems of energy consumption, interference with the pilot's line of sight, and the large angle of light of the LCD display, so as to prevent the interference of the line of sight, improve safety, and save energy. Effect
Active Publication Date: 2015-05-27
常州天禄显示科技有限公司
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Problems solved by technology
[0003] However, the current liquid crystal display technology field still cannot control the light emission angle of the liquid crystal screen, and the light emission angle of the existing liquid crystal display is very large.
In some special applications, such as in the cockpit of an aircraft, the LCD screen will be placed in a narrow cockpit, and the light output angle of the LCD screen should not be too large. If the light output angle is too large, it will not only consume energy, but also illuminate the The reflected light on nearby instruments will interfere with the pilot's sight, especially when driving at night, which will bring certain operational difficulties and potential dangers, so it is necessary to control the lighting angle of the LCD screen
Method used
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Embodiment Construction
[0015] Embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings.
[0016] A backlight module that limits the viewing angle of a liquid crystal screen, uses an angle to control a light guide plate module and an LED light source module, stipulates that the side of the light guide plate close to the liquid crystal layer is the outer surface, and the side corresponding to it is the inner surface, and the angle controls the light guide plate module Including light guide plate 1 and light guide plate 2, the outer surface of light guide plate 1 is pasted with a triangular prism array, the inner surface of light guide plate 2 is pasted with an enhancement sheet, and the outer surface is embedded with a lens array; the triangular prism array uses periodically arranged triangular prisms The long edges are parallel to each other and the boundary of the light guide plate. The triangle angle of the main section of the trian...
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The invention belongs to the technical field of LCD (Liquid Crystal Display) display, and discloses a backlight module for limiting visual angles of an LCD screen. The backlight module comprises an angle control light guide plate module and an LED (Light-Emitting Diode) light source module; two light guide plates are respectively adhered with a triangular prism array and an elliptical lens array which are periodically arranged; the long shafts of ellipses are in parallel to each other, and the basic angles of triangular prisms are asymmetric. The backlight module for limiting the visual angles of the LCD screen has the following beneficial effects that the light emitting angles of the LCD screen are accurately controlled, so that the backlight module is suitably applied to occasions with special requirements on viewing angles of the LCD screen.
Description
technical field [0001] The invention relates to the technical field of liquid crystal display, in particular to a backlight module capable of limiting the viewing angle of a liquid crystal screen. Background technique [0002] At present, some progress has been made in the research of liquid crystal display technology at home and abroad. In the 1990s, with the popularization of notebook computers, liquid crystal display technology began to develop rapidly. [0003] However, in the current liquid crystal display technology field, it is still impossible to control the light emission angle of the liquid crystal screen, and the light emission angles of the existing liquid crystal displays are all very large. In some special applications, such as in the cockpit of an aircraft, the LCD screen will be placed in a narrow cockpit, and the light output angle of the LCD screen should not be too large. If the light output angle is too large, it will not only consume energy, but also ill...
Claims
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Patent Timeline
Login to View More IPC IPC(8): F21S8/00F21V13/00G02F1/13357F21Y101/02
CPCG02B6/0036G02F1/133606G02F1/133607
Inventor 邢晓雨杨宏运朱向冰
Owner 常州天禄显示科技有限公司