CN214840603U

CN214840603U - Light guide plate capable of guiding light uniformly

Info

Publication number: CN214840603U
Application number: CN202121188083.3U
Authority: CN
Inventors: 黄祖安
Original assignee: Foshan Langqing Photoelectric Technology Co ltd
Current assignee: Foshan Langqing Photoelectric Technology Co ltd
Priority date: 2021-05-28
Filing date: 2021-05-28
Publication date: 2021-11-23
Anticipated expiration: 2031-05-28

Abstract

The utility model discloses a light guide plate with uniform light guide, which comprises a PCB (printed circuit board), an LED (light emitting diode) light source and a light guide plate body, wherein the LED light source is fixedly arranged on the PCB, the LED light source is arranged at the side edge of the light guide plate body, the light guide plate body is provided with a light inlet surface, a light outlet surface and a reflecting surface, the side edge of the light guide plate body is provided with a sawtooth-shaped light guide groove for absorbing light, optical recesses are distributed between the intervals of dots, the inner parts of the optical recesses are provided with light guide points, the front ends of the bulges are provided with inclination angles, and the reflecting direction of the reflecting film is aligned with the surface of the light guide plate body, so after the diffuse reflection of the printing ink dots, the light is stored through the optical recesses, meanwhile, part of the light is reflected to the reflecting film through the light guide points, and then the light is reflected to the end surface of the light guide plate body through the reflecting film, thereby the light emitting of the guide plate is uniform, the occurrence of dark areas is avoided.

Description

Light guide plate capable of guiding light uniformly

Technical Field

The utility model relates to a light guide plate technical field specifically is an even light guide plate of leaded light.

Background

The light guide plate is made by utilizing optical acrylic or PC plate materials and then printing light guide points on the material with extremely high refractive index and no light absorption, wherein the bottom surface of the optical acrylic plate material is engraved by laser, engraved by a V-shaped cross grid and printed by a UV screen printing technology, and the light guide plate can convert narrow light rays injected from the side surface of the light guide plate into a larger and more uniform light emitting surface, and the principle is as follows: when light rays irradiate to the light guide point from the side surface of the light guide plate, the light rays can be diffused towards all directions due to diffuse reflection, and the light rays reflected to the light emitting surface from different directions lose the condition of total reflection and can be emitted from the light emitting surface;

for the light guide plate, how to promote its play plain noodles light-emitting homogeneity is the key of improving its quality, because the length and the width of light guide plate are greater than its thickness far away, consequently generally adopt to install a plurality of small-size LED lamp as the light source at the side, in order to make the light energy that LED sent get into the light guide plate as much as possible, avoid energy loss, the LED lamp needs to be close to the light inlet face of light guide plate as far as possible, it is more to have LED the partial light that gets into just to the LED lamp in the light guide plate to have LED to, and the light that the interval part between two adjacent LED lamps just got into the inside part of light guide plate is less, even after the diffuse reflection of printing ink site, still lead to the shade uneven easily, and because the length of light guide plate is great a lot than thickness, often can take place the light-emitting inhomogeneous when adopting sidelight type backlight unit, there is the condition of dark space.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the prior art, the utility model provides an even light guide plate of leaded light.

The utility model provides a technical scheme that its technical problem adopted is: a light guide plate capable of guiding light uniformly comprises a PCB (printed Circuit Board), an LED (light emitting diode) lamp source and a light guide plate body, wherein the LED lamp source is fixedly arranged on the PCB and is arranged on the side edge of the light guide plate body;

the end face of the light guide plate body is provided with a mesh point and an optical recess for storing light energy;

the end face of the light guide plate body is provided with a group of protruding portions, and the side faces of the protruding portions are provided with reflecting films.

Preferably, the light guide groove is arranged on one side of the light incident surface, and the surface of the light guide groove is coated with a black ink coating.

Preferably, the optical cavities are distributed between the intervals of the dots.

Preferably, the optical recess is internally provided with a light guide point.

Preferably, the front end of the protruding portion has an inclination angle, and the light reflecting direction of the reflective film is aligned with the surface of the light guide plate body.

Compared with the prior art, the beneficial effects of the utility model are that:

the light guide plate body has the income plain noodles, go out plain noodles and plane of reflection, the side of light guide plate body is equipped with the cockscomb structure and is used for absorbing the light guide groove of light simultaneously, be equipped with the site on the terminal surface of light guide plate body and be used for storing the optics pocket of light energy, the optics pocket distributes between the interval of site, and the inside of optics pocket is equipped with the leaded light point, the front end of bellying has inclination, and the surface of light guide plate body is aimed at to the reflection of light direction of reflectance coating, consequently after the diffuse reflection of printing ink site has passed through, light is stored through the optics pocket, partial light reflects on the reflectance coating through the leaded light point simultaneously, reflect light on the terminal surface of light guide plate body via the reflectance coating again, thereby make the light-emitting of pipe board even, avoid appearing the condition emergence of dark space.

Drawings

Fig. 1 is a schematic structural view of the present invention;

fig. 2 is a schematic structural view of the protruding portion of the present invention.

Reference numbers in the figures:

the LED light source comprises a PCB (printed circuit board) 1, an LED light source 2, a light guide plate body 3, a light guide groove 4, an ink coating 5, a mesh point 6, an optical recess 7, a convex part 8, a reflecting film 9, a light incident surface 10, a reflecting surface 11 and a light emergent surface 12.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

As shown in fig. 1-2, the utility model provides a light guide plate with uniform light guide, which comprises a PCB 1, an LED light source 2 and a light guide plate body 3, wherein the LED light source 2 is fixedly mounted on the PCB 1, the LED light source 2 is arranged at the side of the light guide plate body 3, the light guide plate body 3 is provided with a light incident surface 10, a light emergent surface 12 and a reflecting surface 11, and the side of the light guide plate body 3 is provided with a sawtooth-shaped light guide groove 4 for absorbing light;

the end face of the light guide plate body 3 is provided with a mesh point 6 and an optical recess 7 for storing light energy;

the end face of the light guide plate body 3 is provided with a group of protruding parts 8, and the side faces of the protruding parts 8 are provided with reflecting films 9.

The light guide groove 4 is arranged on one side of the light incident surface 10, and the surface of the light guide groove 4 is coated with a black ink coating 5.

The optical cavities 7 are distributed between the intervals of the dots 6.

The optical cavity 7 is internally provided with a light guide point.

The front end of the protruding part 8 has an inclination angle, and the reflection direction of the reflection film 9 is aligned with the surface of the light guide plate body 3.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. The light guide plate capable of guiding light uniformly is characterized by comprising a PCB (printed circuit board), an LED (light emitting diode) lamp source and a light guide plate body, wherein the LED lamp source is fixedly arranged on the PCB, the LED lamp source is arranged on the side edge of the light guide plate body, the light guide plate body is provided with a light incoming surface, a light outgoing surface and a reflecting surface, and meanwhile, the side edge of the light guide plate body is provided with a sawtooth-shaped light guide groove for absorbing light;

2. The light guide plate of claim 1, wherein the light guide grooves are disposed on one side of the light incident surface, and the surfaces of the light guide grooves are coated with black ink.

3. The light guide plate of claim 1, wherein the optical cavities are distributed between the dot spacings.

4. The light guide plate of claim 1, wherein the optical cavities are provided with light guide points.

5. The light guide plate of claim 1, wherein the front ends of the protrusions have an inclination angle, and the reflection direction of the reflective film is aligned with the surface of the light guide plate body.