Backlight module

Abstract

The invention relates to a backlight module which comprises a first light guiding plate and a second light guiding plate which are mutually arranged in an iterative way, wherein the first light guiding plate comprises a first plate body, a first extension part and a first light source; the first plate body is provided with a first internal surface and a first external surface which are opposite; the first internal surface faces the second light guiding plate; the first extension part is arranged at the edge of the first internal surface and is extended to one side surface of the second light guiding plate at a direction from the first plate body to the second light guiding plate; the first extension part and the first plate body form a first light incoming surface; the first extension part is also provided with a first reflecting surface which is at least connected with one of the first incoming surface and the first internal surface; the first light source is arranged at one side of the first light incoming surface and casts light rays towards the first light incoming surface; the first reflecting surface guides the light rays of the first light source to the first external surface; and the light emitting surface with a large light emitting area can be effectively received.

Description

technical field [0001] The invention relates to a backlight module, in particular to the structure of the backlight module. Background technique [0002] Backlight modules can be roughly divided into "side-light" and "direct-light" designs according to the position of the light source. The "side-light" design of the backlight module is to place light sources such as light-emitting diodes (LEDs) on the side of the light guide plate, and then use the light guide The light panel controls the direction of the light beam to provide a uniform surface light source. [0003] With the demands and restrictions of modern trends, many light-emitting products are developing towards short, light and thin shapes, which makes the light guide plate of the backlight module in the light-emitting product gradually thinner, reducing the thickness of the light guide plate; even, the light incident surface on the side of the light guide plate The area is also smaller than the effective light outp...

AI Technical Summary

Problems solved by technology

[0003] With the demands and restrictions of modern trends, many light-emitting products are developing towards short, light and thin shapes, which makes the light guide plate of the backlight module in the light-emitting product gradually thinner, reducing the thickness of the light guide plate; even, the light incident surface on the side of the light guide plate The area is also smaller than the effective light output area of ​​the light source (such as a light emitting diode), which instead causes the light incident surface of the light guide plate to be unable to effectively receive all the light output from the light source, thereby attenuating the light output efficiency of the light guide plate

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