Unlock instant, AI-driven research and patent intelligence for your innovation.

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.

Active Publication Date: 2021-08-10
苏州晶智铱锘光电科技有限公司
View PDF4 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

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

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Wedge-shaped light guide plate for collimating backlight module and collimating backlight module thereof
  • Wedge-shaped light guide plate for collimating backlight module and collimating backlight module thereof
  • Wedge-shaped light guide plate for collimating backlight module and collimating backlight module thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0030] Example: such as figure 1 As shown, a new collimation backlight module includes a wedge-shaped light guide plate 01, a strip light source 02, an inverse prism film 03 and a reflective film 04. The structure of the wedge-shaped light guide plate 01 is as follows figure 2 and image 3 As shown, it is surrounded by the light incident surface 003, the first light exit surface 001, the second light exit surface 002 and two side surfaces of the thick end, the first light exit surface 001 and the second light exit surface 002 of the wedge-shaped light guide plate 01 form a wedge angle α, and A light-emitting surface 001 is provided with a first light-emitting microprism structure; a second light-emitting surface 002 is provided with a second light-emitting microprism structure; The two light-emitting microprism structures are composed of multiple light-emitting microprism strips or light-emitting microprism grooves extending from the thick end to the thin end of the wedge-sh...

Embodiment 2

[0040] Embodiment two: if Figure 8 and Figure 9As shown, there are two superimposed light guide plates 011 and 012 from top to bottom. In this embodiment, two layers of light guide plates are taken as an example to describe the process of light propagating in a multilayer light guide plate.

[0041] like Figure 9 As shown, the light 18 propagates from the light incident surface 003 to the first light exit surface 001 of the wedge-shaped light guide plate 011. Since the total reflection condition is not met at this time, it enters the air after being refracted by the first light exit surface 001, and propagates to the reverse prism film On one edge of the microprism structure of 03, light 18 enters the interior of the microprism structure after being refracted. Since light 18 is close to a bottom angle of the microprism structure at this time, the light propagates straight to the top boundary of the reverse prism film 03, and directly Outgoing, because the light 18 is not ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
angleaaaaaaaaaa
Login to View More

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.

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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G02B6/00G02F1/13357
CPCG02B6/0016G02B6/0036G02B6/0058G02B6/0076G02F1/133606G02B6/0038G02B6/0053G02B6/0046G02B6/0055G02B6/0025
Inventor 陈玉雷武鹏周淑金
Owner 苏州晶智铱锘光电科技有限公司