CN211653203U - High-brightness composite light guide plate - Google Patents

Abstract

The utility model discloses a high-brightness composite light guide plate, which comprises a light guide plate main body, a reflecting layer, a shielding layer, a positioning layer and a reflecting shell, wherein the front side surface of the light guide plate main body is a light incident surface, and the reflecting layer is laminated on the upper surface of the light guide plate main body; the shielding layer is adhered to the lower surface of the light guide plate body; the positioning layer is adhered to the lower surface of the shielding layer; the front side surface of the light guide plate body is concavely provided with a plurality of rhombic light guide grooves capable of dispersing incident light, the rhombic light guide grooves can uniformly disperse the incident light, the side surface of the light guide plate is provided with the light reflecting shell, the inner side surface of the light reflecting shell is a light reflecting surface, and the light reflecting surface can reflect the light in the light guide plate into the light guide plate, so that the light can be dispersed more uniformly; meanwhile, a hollow refraction cavity is arranged in the middle of the reflecting layer, so that light can be dispersed again when entering the reflecting layer, and the light guide plate can effectively provide uniform light emitting brightness.

Description

High brightness composite light guide plate

technical field

The utility model relates to the technology in the field of light guide plates, in particular to a high-brightness composite light guide plate.

Background technique

The liquid crystal display module is a non-self-luminous display device, and its display is mainly realized by controlling the passing or non-passing of the light beam emitted by the external light source, so a corresponding backlight or front light module is usually required. The light beam emitted by the light source is directed to the display panel to realize the display function.

The prior art backlight module is mainly composed of a light source, a light guide plate, a diffuser plate and a prism plate. The light guide plate includes an incident surface, a light exit surface and a bottom surface, wherein the incident surface receives the light beam emitted by the opposite light source, and guides the light beam into the light guide plate, and the bottom surface reflects and scatters the introduced light beam to form The scattered light beams are uniformly dispersed in all directions, and the light emitting surface leads the uniformly dispersed light beams out of the light guide plate.

The reflection and scattering of the light beam by the bottom are realized by the dots. The bottom surface of the light guide plate is distributed with a plurality of evenly arranged dots, which reflect and scatter the light beams introduced from the incident surface. However, since the light emitted by the light source enters through the incident surface of the light guide plate, the part of the light guide plate close to the light source has high brightness, while the part far from the light source has low brightness, so the dot design cannot effectively provide uniform luminous brightness.

Utility model content

In view of this, the main purpose of the present invention is to provide a high-brightness composite light guide plate, which can effectively solve the problem that the existing light guide plate cannot effectively provide uniform luminous brightness. .

To achieve the above object, the present invention adopts the following technical scheme:

A high-brightness composite light guide plate, comprising a light guide plate body, a reflective layer, a shielding layer, a positioning layer and a reflective shell, the front side of the light guide plate body is a light incident surface, and the front side of the light guide plate body is concavely provided with A plurality of diamond-shaped light guide grooves that can disperse incident light, the reflection layer is arranged on the upper surface of the light guide plate body, and a hollow refraction cavity is arranged in the middle of the reflection layer; the shielding layer is pasted on the lower surface of the light guide plate body, The shielding layer includes, from top to bottom, a pure quartz glass layer, a mixed layer of fluorine-quartz glass and a mixed layer of germanium and fluorine-quartz glass; the positioning layer is adhered to the lower surface of the shielding layer; there is an accommodating space in the middle of the reflective shell , the main body of the light guide plate, the reflective layer, the shielding layer and the positioning layer are all arranged in the accommodating space, and the inner side of the reflective casing is a reflective surface that can reflect light.

As a preferred solution: a plurality of diamond-shaped light guide grooves are arranged at equal distances in a line.

As a preferred solution: the depth of the diamond-shaped light guide groove is 0.5-0.8 cm.

As a preferred solution: the cross section of the refraction cavity is in the shape of an 8-pointed star.

As a preferred solution: the positioning plate is made of resin.

Compared with the prior art, the present utility model has obvious advantages and beneficial effects. Specifically, it can be known from the above technical solutions:

The front side of the light guide plate is provided with a plurality of diamond-shaped light guide grooves that can disperse the incident light, the diamond-shaped light guide grooves can evenly disperse the incident light, and a reflective shell is arranged on the side of the light guide plate. The inner side of the reflective shell is a reflective surface, which can reflect the light in the light guide plate into the light guide plate, so that the light can be dispersed more evenly; at the same time, a hollow refraction cavity is arranged in the middle of the reflective layer, The light will be dispersed again when entering the reflective layer, so that the light guide plate can effectively provide uniform luminous brightness.

In order to illustrate the structural features and functions of the present invention more clearly, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

Description of drawings

Fig. 1 is the horizontal sectional view of the preferred embodiment of the present utility model;

Fig. 2 is the vertical sectional view of the preferred embodiment of the present utility model;

3 is a cross-sectional view of the shielding layer of the preferred embodiment of the present invention.

Description of drawings:

10. Main body of light guide plate 101. Light incident surface

102. Diamond light guide groove 20. Reflective layer

201. Refraction cavity 30. Shielding layer

31, pure quartz glass layer 32, fluorine quartz glass mixed layer

33. Germanium fluorine quartz glass mixed layer 40. Positioning layer

50. Reflective shell 501. Reflective surface

502, accommodating space 60, light source.

Detailed ways

Please refer to FIG. 1 to FIG. 3 , which show the specific structure of the preferred embodiment of the present invention, including a light guide plate body 10 , a reflective layer 20 , a shielding layer 30 , a positioning layer 40 and a reflective casing 50 .

The front side of the light guide plate body is a light incident surface 101 , and the light incident surface 101 is a surface irradiated by light. The front side of the light guide plate body is recessed with a plurality of diamond-shaped light guide grooves 102 that can disperse the incident light. The diamond-shaped light guide grooves 102 can refract the external light into the light guide plate at multiple angles, so that the light is dispersed More uniformly, the reflective layer 20 is stacked on the upper surface of the light guide plate body, and a hollow refraction cavity 201 is arranged in the middle of the reflective layer 20 . The reflective layer 20 will disperse the light again to make the light more uniform; the shielding layer 30 is pasted on the lower surface of the light guide plate body, and the shielding layer 30 includes a pure quartz glass layer 31, a fluoroquartz glass layer from top to bottom The mixed layer 32 and the germanium fluorine quartz glass mixed layer 33 make the light guide plate have a larger effective refractive index difference through the shielding layer 30, thereby reducing crosstalk; the positioning layer 40 is adhered to the lower surface of the shielding layer 30, the positioning The layer 40 is mainly used to provide protection for the shielding layer 30; the reflective shell 50 has an accommodating space 502 in the middle, and the aforementioned light guide plate body 10, the reflective layer 20, the shielding layer 30 and the positioning layer 40 are all arranged in the accommodating space 502, The inner side of the reflective casing 50 is a reflective surface 501 that can reflect light, and the reflective casing 50 can reflect the light refracted on the side of the light guide plate, so that the light enters the interior of the reflective plate again.

In this embodiment, the plurality of diamond-shaped light guide grooves 102 are arranged in a line at equal distances. The positioning plate is made of resin material, and can also be one of epoxy resin, phenolic resin, polyacrylic resin, and polyvinyl chloride resin.

Further, the depth of the diamond-shaped light guide groove 102 is 0.5-0.8 cm. The cross section of the refraction cavity 201 is in the shape of an 8-pointed star, and the cross section of the refraction cavity 201 may also be in other shapes.

The working principle of this embodiment is described in detail as follows:

When in use, the light source 60 is located on the right side of the light guide plate main body 10. The light generated by the light source 60 first enters the light guide plate main body 10 from the light incident surface 101 through the diamond light guide groove 102, and then passes through the reflective layer 20, the shielding layer 30 and the reflective shell. Under the cooperative action of , it is ejected upward, and finally, it is evenly ejected through the positioning layer 40 .

The design focus of this utility model is:

The front side of the light guide plate is provided with a plurality of diamond-shaped light guide grooves that can disperse the incident light, the diamond-shaped light guide grooves can evenly disperse the incident light, and a reflective shell is arranged on the side of the light guide plate. The inner side of the reflective shell is a reflective surface, which can reflect the light in the light guide plate into the light guide plate, so that the light can be dispersed more evenly; at the same time, a hollow refraction cavity is arranged in the middle of the reflective layer, The light will be dispersed again when entering the reflective layer, so that the light guide plate can effectively provide uniform luminous brightness.

The above descriptions are only preferred embodiments of the present invention, and do not limit the technical scope of the present invention. Therefore, any minor modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present invention , all still belong to the scope of the technical solution of the present invention.

Claims (5)

1. A high-brightness composite light guide plate is characterized in that: the light guide plate comprises a light guide plate main body, a reflecting layer, a shielding layer, a positioning layer and a reflecting shell, wherein the front side surface of the light guide plate main body is a light incoming surface, a plurality of rhombic light guide grooves capable of dispersing incident light rays are concavely arranged on the front side surface of the light guide plate main body, the reflecting layer is arranged on the upper surface of the light guide plate main body in a stacking manner, and a hollow refraction cavity is arranged in the middle of the reflecting layer; the shielding layer is adhered to the lower surface of the light guide plate body and comprises a pure quartz glass layer, a fluorite glass mixed layer and a germanium-fluorite glass mixed layer from top to bottom; the positioning layer is adhered to the lower surface of the shielding layer; the middle of the reflecting shell is provided with an accommodating space, the light guide plate main body, the reflecting layer, the shielding layer and the positioning layer are all arranged in the accommodating space, and the inner side surface of the reflecting shell is a reflecting surface capable of reflecting light.

2. The high-luminance composite light guide plate according to claim 1, wherein: the plurality of rhombic light guide grooves are arranged in a straight line at equal intervals.

3. The high-luminance composite light guide plate according to claim 1, wherein: the depth of the rhombic light guide groove is 0.5-0.8 cm.

4. The high-luminance composite light guide plate according to claim 1, wherein: the cross section of the refraction cavity is 8-pointed star shape.

5. The high-luminance composite light guide plate according to claim 1, wherein: the positioning layer is made of resin.

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