Backlight module, display device, and method of manufacturing light guide plate

Abstract

The disclosure discloses a backlight module, a display device, and a method of manufacturing a light guide plate. The backlight module comprises the following parts of a first dielectric layer havinga plurality of first optical structures; a second dielectric layer disposed on the first dielectric layer and having a plurality of second optical structures; a first light source for providing a first incident light, wherein the first incident light is converted into a first outgoing light by the light guiding surfaces of the plurality of first optical structures, and the first outgoing light isemitted toward the light emitting side of the backlight module sequentially through the first dielectric layer and the second dielectric layer; and a second light source configured to provide a secondincident light, wherein the second incident light is converted into a second outgoing light by the light guiding surface of the plurality of second optical structures, the second outgoing light is emitted toward the light emitting side of the backlight module through the second dielectric layer, and the radian of the light guiding surfaces of the first optical structures facing toward the first light source is greater than that of the light guiding surfaces of the second optical structures facing toward the second light source, so that the range of the emitting angle of the first outgoing light is greater than the range of the emitting angle of the second light.

Description

technical field [0001] The present invention relates to the field of display technology, and more specifically, to a backlight module, a display device and a manufacturing method of a light guide plate. Background technique [0002] Liquid Crystal Display (LCD) has the advantages of good image quality, small size, light weight, low driving voltage, low power consumption, no radiation and relatively low manufacturing cost, and occupies a dominant position in the field of flat panel display. [0003] With the continuous advancement of liquid crystal display technology, the viewing angle of the display can be switched between wide and narrow viewing angles. While enjoying the visual experience brought by the large viewing angle, people can also effectively protect business secrets and personal privacy to avoid leakage of screen information. [0004] In the prior art, a CBL backlight module is used to control the wide and narrow viewing angles of the backlight module by control...

AI Technical Summary

Problems solved by technology

[0006] 1. When the PDLCs are arranged in disorder, the wide viewing angle outgoing light is emitted from the display module, and the display module displays a wide viewing angle state, but due to the characteristics of the CBL backlight module, the directivity of the outgoing light is relatively high, compared with ordinary backlight In terms of narrowing the exit angle of the wide viewing angle exit light, the display of the wide viewing angle screen is not good

[0007] 2. When the orderly / disordered arrangement of liquid crystal molecules in PDLC is used to control the switching between wide and narrow viewing angles, in the actual production and use of PDLC, there will be problems of liquid leakage due to poor sealing, which will make the PDLC function invalid, so it cannot be compared. Good realization of switching between wide and narrow viewing angles

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