High-brightness and high-luminance light guide plate

Abstract

The utility model discloses a high-brightness and high-brightness light guide plate, which comprises a body, a reflecting film and a diffusion layer, the body is provided with a light-in surface, a light-reflecting surface and a light-out surface; the reflective film is attached to the reflective surface; and the diffusion layer is attached to the light incident surface. The conical groove is formed in the reflective surface, the inner diameter of the conical groove is sequentially reduced from bottom to top, compared with a traditional round diffusion point, the design of the conical groove changes the angle of the refracting surface of light, the light is refracted by the conical groove, reflected by the reflective film and refracted by the conical groove in sequence and finally emitted out from the light emitting surface, the refracting angle of the light is reduced, and the light emitting efficiency is improved. A plurality of prism structures are arranged on the light emitting face in a matched mode, the prism structures have the light gathering function, light is evenly emitted out, the distribution rate of the light is improved, the reflection brightness of the light is further improved, a plurality of cavities are formed in the light emitting face, the optical path of the light on the light guide plate is reduced, light loss is reduced, and the light emitting efficiency is improved. And the light utilization rate is improved.

Description

Technical Field

[0001] The utility model relates to the field of light guide plates, in particular to a light guide plate with high brightness and high brilliance. Background Art

[0002] A liquid crystal display module is a non-self-luminous display device, and its display is mainly achieved by controlling the passage or non-passage of a light beam emitted by an external light source. Therefore, a corresponding backlight or frontlight module is usually required. The backlight or frontlight module can guide the light beam emitted by the external light source to the display panel to achieve the display function.

[0003] 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 reflective surface. The incident surface receives the light beam emitted by the light source opposite to it and guides the light beam into the interior of the light guide plate. The reflective surface reflects and scatters the introduced light beam to form a scattered light beam that is evenly dispersed in all directions. The light exit surface guides the evenly dispersed light beam out of the light guide plate. In order to improve light utilization efficiency and light output uniformity, a plurality of evenly distributed circular diffusion points are usually provided on the reflective surface. However, the design of the circular diffusion points results in a large refraction angle between the light emitted from the light exit surface and the light guide plate after reflection and refraction, which reduces the brightness of the light reflected by the light guide plate. At the same time, since the light emitted by the light source enters the light guide plate from the light incident surface, part of the light needs to pass through the middle of the light guide plate. The optical path is long and multiple reflections are required, which will cause light loss, thereby reducing the light utilization efficiency of the light guide plate. Therefore, it is necessary to improve the existing light guide plate. Utility Model Content

[0004] In view of this, the present invention aims to address the deficiencies in the prior art, and its main purpose is to provide a high-brightness and high-luminance light guide plate, which can effectively solve the problems of insufficient brightness of light reflected by the existing light guide plate, large light loss, and low light utilization.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] A high-brightness and high-luminance light guide plate includes a body, a reflective film, and a diffusion layer; the body has a light incident surface, a light reflecting surface, and a light emitting surface; the light reflecting surface is provided with a tapered groove, the inner diameter of the tapered groove decreases from bottom to top; the light emitting surface is provided with multiple cavities, and multiple prism structures are arranged on the light emitting surface; the reflective film is attached to the light reflecting surface; the diffusion layer is attached to the light incident surface, and multiple diffusion particles are evenly distributed in the diffusion layer.

[0007] As a preferred solution, a plurality of the tapered grooves are arranged at intervals on the left and right.

[0008] As a preferred solution, the prism structure is a quadrangular pyramid protrusion, and the multiple prism structures are arranged on the light-emitting surface at intervals on the left and right.

[0009] As a preferred solution, the multiple cavities are arranged on the light emitting surface at intervals on the left and right sides.

[0010] As a preferred solution, the plurality of cavities are all obliquely opened on the light emitting surface, and an angle formed between the cavity and the light emitting surface is α, and 0<α<180°.

[0011] As a preferred solution, the multiple cavities all extend up and down.

[0012] As a preferred solution, the cross-sections of the multiple cavities are all triangular, which reduces the number of light refraction and reflection and reduces light loss.

[0013] Compared with the prior art, the present invention has obvious advantages and beneficial effects. Specifically, it can be seen from the above technical solution that:

[0014] By opening a conical groove on the reflective surface, the inner diameter of the conical groove decreases from bottom to top. Compared with the traditional circular diffusion point, the design of the conical groove changes the refraction angle of the light. The light is refracted by the conical groove, reflected by the reflective film, and refracted by the conical groove in sequence, and finally emitted from the light-emitting surface. The refraction angle of the light is reduced, so that the brightness of the light reflected by the light guide plate is greater. In addition, multiple prism structures are arranged on the light-emitting surface. The prism structure has a focusing effect, so that the light is emitted evenly, the distribution rate of light is improved, and the reflected brightness of light is further improved. In addition, multiple cavities are opened on the light-emitting surface to reduce the optical path of light on the light guide plate, reduce light loss, and improve light utilization.

[0015] In order to more clearly illustrate the structural features and effects of the present invention, the present invention is described in detail below with reference to the accompanying drawings and specific embodiments: BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a cross-sectional view of a preferred embodiment of the present utility model.

[0017] Description of the accompanying drawings:

[0018] 10. Main body 101. Light incident surface

[0019] 102, reflective surface 103, light emitting surface

[0020] 11. Conical groove 12. Cavity

[0021] 13. Prism structure 20. Reflective film

[0022] 30. Diffusion layer. DETAILED DESCRIPTION

[0023] Please refer to Figure 1 As shown, it shows the specific structure of a preferred embodiment of the present invention, including a body 10, a reflective film 20 and a diffusion layer 30.

[0024] The body 10 has a light incident surface 101, a light reflecting surface 102 and a light emitting surface 103. The light reflecting surface 102 is provided with a tapered groove 11, the inner diameter of which decreases from bottom to top. The light emitting surface 103 is provided with a plurality of cavities 12. The design of the cavities 12 can provide multiple reflection and refraction surfaces for the incident light. After the light enters the light guide plate, the light can be reflected and refracted by the multiple cavities 12 to the light emitting surface 103, thereby avoiding light loss caused by a long optical path and multiple reflections. In addition, a plurality of prism structures 13 are provided on the light emitting surface 103. In this embodiment, The multiple cavities 12 are arranged at intervals on the light-emitting surface 103, and the multiple cavities 12 extend up and down; in addition, the multiple cavities 12 are all inclined on the light-emitting surface 103, and the angle formed by the cavity 103 and the light-emitting surface 103 is α, and 0<α<180°; the cross-sections of the multiple cavities 12 are all triangular, which reduces the number of light refraction and reflection and reduces light loss; and the multiple conical grooves 11 are arranged at intervals on the left and right, and the prism structure 13 is a quadrangular pyramid protrusion, and the multiple prism structures 13 are arranged at intervals on the left and right on the light-emitting surface 103.

[0025] The reflective film 20 is attached to the reflective surface 102 to effectively improve the reflective function of the reflective surface 102 .

[0026] The diffusion layer 30 is attached to the light incident surface 101 , and a plurality of diffusion particles are evenly distributed in the diffusion layer 30 . The diffusion layer 30 allows the incident light to enter the light guide plate evenly.

[0027] The design focus of the present invention is that a conical groove is provided on the reflective surface, and the inner diameter of the conical groove decreases from bottom to top. Compared with the traditional circular diffusion point, the design of the conical groove changes the refraction angle of the light. The light is refracted by the conical groove, reflected by the reflective film, and refracted by the conical groove in sequence, and finally emitted from the light-emitting surface, and the refraction angle of the light is reduced, so that the brightness of the light reflected by the light guide plate is greater. In addition, a plurality of prism structures are provided on the light-emitting surface. The prism structure has a focusing effect, so that the light is emitted evenly, the distribution rate of the light is improved, and the reflected brightness of the light is further improved. In addition, a plurality of cavities are provided on the light-emitting surface to reduce the optical path of the light on the light guide plate, reduce light loss, and improve the utilization rate of light.

[0028] The above description is merely a preferred embodiment of the present invention and does not limit the technical scope of the present invention. Therefore, any minor modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A high-brightness and high-luminance light guide plate, characterized by: The invention comprises a main body, a reflective film and a diffusion layer; the main body has a light incident surface, a light reflecting surface and a light emitting surface; the reflective surface is provided with a tapered groove, the inner diameter of the tapered groove decreases from bottom to top; the light emitting surface is provided with multiple cavities, and multiple prism structures are arranged on the light emitting surface; the reflective film is attached to the light reflecting surface; the diffusion layer is attached to the light incident surface, and multiple diffusion particles are evenly distributed in the diffusion layer.

2. The high-brightness and high-luminance light guide plate according to claim 1, characterized in that: The tapered grooves are arranged in a plurality of intervals on the left and right sides.

3. The high-brightness and high-luminance light guide plate according to claim 1, characterized in that: The prism structure is a quadrangular pyramid protrusion, and the multiple prism structures are arranged on the light-emitting surface at intervals on the left and right.

4. The high-brightness and high-luminance light guide plate according to claim 1, characterized in that: The plurality of cavities are arranged on the light emitting surface at intervals on the left and right sides.

5. The high-brightness and high-luminance light guide plate according to claim 1, characterized in that: The plurality of cavities are all obliquely opened on the light emitting surface, and an angle formed between the cavity and the light emitting surface is α, and 0<α<180°.

6. The high-brightness and high-luminance light guide plate according to claim 1, characterized in that: The multiple cavities all extend up and down.

7. The high-brightness and high-luminance light guide plate according to claim 1, characterized in that: The cross sections of the multiple cavities are all triangular.

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