Wedge-shaped light guide plate for collimating backlight module and collimating backlight module thereof

A technology of backlight module and light guide plate, which is applied in light guides, planar/plate light guides, light guides of lighting systems, etc., and can solve the problems that the collimation of light output needs to be improved.
CN113238314AActive Publication Date: 2021-08-10苏州晶智铱锘光电科技有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
苏州晶智铱锘光电科技有限公司
Publication Date
2021-08-10

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Abstract

The invention discloses a wedge-shaped light guide plate for collimating a backlight module and a collimating backlight module thereof. The wedge-shaped light guide plate is defined by a light incident surface at a thick end, a first light emergent surface, a second light emergent surface and two side surfaces, a wedge angle is formed between the first light emergent surface and the second light emergent surface, and the wedge-shaped light guide plate is characterized in that a light incident microprism structure is arranged on the light incident surface; the collimation backlight module is composed of at least one wedge-shaped light guide plate, a strip-shaped light source arranged on one side of a light inlet face of the wedge-shaped light guide plate, an inverse prism film arranged on one side of a first light outlet face and a reflecting film arranged on one side of a second light outlet face, the strip-shaped light source extends from one side face of the wedge-shaped light guide plate to the other side face of the wedge-shaped light guide plate, and one side of the inverse prism film provided with a micro prism structure faces the first light emitting surface. The wedge-shaped light guide plate is advantaged in that a purpose of controlling the light emitting angle can be achieved so as to adapt to the requirements of different application occasions; the half-width distribution of the light emitting angle of the collimation backlight module can reach + / -25 degrees, and the peep-proof angle of the collimation backlight module is superior to that of most peep-proof films in the current market.
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Description

technical field

[0001] The invention relates to a collimating backlight module used for a liquid crystal display, and relates to a wedge-shaped light guide plate used for the collimating backlight module and the collimating backlight module. Background technique

[0002] In recent years, as people have higher and higher requirements for the confidentiality of electronic data, people's demand for anti-peep screens is increasing, and the terminal market demand is strong. The current solutions to the anti-peeping performance of the display screen are mainly divided into two categories: ① adding an anti-peeping film to the original display module. ②Use a backlight module with anti-peep feature to achieve the purpose of anti-peep.

[0003] As for the collimated backlight module belonging to the second application scenario, the collimation of the emitted light in the dimension perpendicular to the light transmission direction still needs to be improved. Contents of the inventio...

Claims

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