LIGHT GUIDE PLATE AND DISPLAY DEVICE

Abstract

A light guide plate including a main body of the light guide plate, and a buffer layer and a reflective layer integrally formed on a lower surface of the main body in sequence, and an upper surface of the main body is provided with a plurality of scattering netted dots. The present disclosure further provides a display device.

Claims

1. A light guide plate, comprising: a main body of the light guide plate; and a buffer layer and a reflective layer integrally formed on a lower surface of the main body in sequence, wherein an upper surface of the main body is provided with a plurality of scattering netted dots.

2. The light guide plate of claim 1, wherein the main body of the light guide plate is glass.

3. The light guide plate of claim 1, wherein the buffer layer is one of aluminum oxide, nickel or chromium.

4. The light guide plate of claim 1, wherein the reflective layer comprises a first reflective layer adhering closely to the lower surface of the buffer layer, and the first reflective layer is a metal layer.

5. The light guide plate of claim 4, wherein the reflective layer further comprises a second reflective layer adhering closely to lower surface of the first reflective layer, and the second reflective layer comprises a plurality of dielectric layers made of a material having two different refractive indexes.

6. The light guide plate of claim 5, wherein the dielectric layer of the second reflective layer is formed by alternately stacking a SiO.sub.2 layer and a TiO.sub.2 layer.

7. The light guide plate of claim 5, wherein the dielectric layer of the second reflective layer is formed by alternately stacking a MgF.sub.2 layer and a ZnS layer.

8. The guide light plate of claim 4, wherein the light guide plate further comprises a protective layer adhering closely to the lower surface of the reflective layer.

9. The light guide plate of claim 8, wherein the protective layer is made of SiO.sub.2 material.

10. A display device, comprising: an optical film set; a display panel; and a light guide plate, comprising a main body, and a buffer layer and a reflective layer integrally formed on a lower surface of the main body in sequence, and on an upper surface of the main body is provided with a plurality of scattering netted dots.

11. The display device of claim 10, wherein the main body of the light guide plate is made of glass.

12. The display device of claim 10, wherein the buffer layer is made of one of aluminum oxide, nickel or chromium.

13. The display device of claim 10, wherein the reflective layer comprises a first reflective layer adhering closely to the lower surface of the buffer layer, and the first reflective layer is a metal layer.

14. The display device of claim 13, wherein the reflective layer further comprises a second reflective layer adhering closely to a lower surface of the first reflective layer, and the second reflective layer comprises a plurality of dielectric layers made of materials having two different refractive indexes.

15. The display device of claim 14, wherein the dielectric layer of the second reflective layer is formed by alternately stacking a SiO.sub.2 layer and a TiO.sub.2 layer.

16. The display device of claim 14, wherein the dielectric layer of the second reflective layer is formed by alternately stacking a MgF.sub.2 layer and a ZnS layer.

17. The display device of claim 13, wherein the guide light plate further comprises a protective layer adhering closely to the lower surface of the reflective layer.

18. The display device of claim 17, wherein the protective layer is made of SiO.sub.2 material.

19. A display device, comprising an optical film set, a display panel and a light guide plate, wherein the light guide plate comprises a main body of the light guide plate and a buffer layer and a reflective layer integrally formed on a lower surface of the main body in sequence, and an upper surface of the main body is provided with a plurality of scattering netted dots; and the reflective layer comprises a first reflective layer adhering closely to a lower surface of the buffer layer, and the first reflective layer is a metal layer.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0018] FIG. 1 is a schematic diagram of a structure of a display device according to an embodiment of the present disclosure.

[0019] FIG. 2 is a software simulation result diagram of reflectivity of incident light having different wavelengths of the light guide plate at an incident angle of 0° according to an embodiment of the present disclosure.

[0020] FIG. 3 is a software simulation result diagram of reflectivity of incident light having different wavelengths of the light guide plate at an incident angle of 30° according to an embodiment of the present disclosure.

[0021] FIG. 4 is a software simulation result diagram of reflectivity of incident light having different wavelengths of the light guide plate at an incident angle of 70° according to an embodiment of the present disclosure.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0022] In order for a clearer understanding of the purpose, technical solutions and the advantages of the present disclosure, the present disclosure will be explained in detail by referring to the drawings and exemplary embodiments. It should be understood that the certain exemplary embodiments described herein are only used to explain the present disclosure, but are not limited thereto.

[0023] Referring to FIG. 1, the light guide plate of the present disclosure includes a main body 11 of the light guide plate, and buffer layer 12, a reflective layer 13 and a protective layer 14 integrally formed on a lower surface of the main body 11 in sequence from top to bottom, and an upper surface of the main body 11 is provided with a plurality of scattering netted dots.

[0024] The main body 11 of the light guide plate is a glass, several scattering netted dots 100 are formed on an upper surface of the glass in an array through laser drilling, and the light emitted through the upper surface as a light exiting surface and scattered by the scattering netted dots 100 may have uniform light emitting and good consistency.

[0025] The buffer layer 12 is one of aluminum oxide, nickel or chromium, and the reflective layer 13 includes a first reflective layer 13a and a second reflective layer 13b adhering closely to the lower surface of the buffer layer 12. The first reflective layer 13a is a metal layer, and the second reflective layer 13b is a dielectric layer. Preferably, the first reflective layer 13a is a sliver reflective layer coated or plated on the lower surface of the buffer layer 12, and due to the existence of the buffer layer, the first reflective layer 13a can be adhered on the main body 11 of the light guide plate so as to avoid releasing. The second reflective layer 13b includes a plurality of dielectric layers made of materials having two different refractive indexes, and the dielectric layer is formed by stacking two materials having high and low refractive indexes. Due to an existence of the first reflective layer, the number of the dielectric layers may be relatively small, preferably is 3-20 layers, such as 3 layers, 8 layers, 16 layers, 20 layers or the like. The dielectric layer of the second reflective layer 13b is made of combination of reflective layers with high/low refraction indexes, such as a combination of SiO.sub.2 layer and TiO.sub.2 layer, and a combination of MgF.sub.2 layer and ZnS layer. Through the above configuration, the high refractive index material and the low refractive index material are arranged alternately in sequence from top to bottom to form a composite reflection structure, thus the light passed through the first reflective layer 13a can be reflected back from the second reflective layer 13b, thereby greatly enhancing the overall brightness and optical utilization of the light guide plate 10.

[0026] Furthermore, the protective layer 14 is made of SiO.sub.2 material with ½ wavelength and is coated on the bottom of the second reflective layer 13b, thus can be used to protect the reflective layer from being damaged.

[0027] The light guide plate 10 of the embodiment of the present disclosure can be applied to various display devices with ultra-thin size. In particular, the display device includes a light guide plate 10, an optical film set 20, a display panel 30, a middle frame 40, a front frame 50 and a light source module 60. The light source module 60 is a LED light source, and is integrated with a heat sink panel and placed at a side of light incident side of the light guide plate 10. The middle frame 40 receives the light guide plate 10 and the light source module 60 therein. The optical film set 20 is a multi-layer composite optical film and is tightly fitted to the upper surface of the middle frame 40 to scatter and deflect the light emitted from the light exiting surface of the light guide plate, to thereby forming a predetermined light extraction effect. The front frame 50 covers the middle frame 40 to protect the middle frame 40 and the components in the middle frame. The display panel 30 is mounted on the upper surface of the front frame 50 by dispensing, pasting or the like. More particularly, the upper surface close to the inner side of the middle frame 40 is provide with a round of steps having the same height as that of the optical film set 20, and an end of the optical film set 20 is embedded in and tightly fitted to the steps, and the inner surface of the front frame 50 is tightly fitted to the upper surfaces of the optical film set 20 and the middle frame 40, such that the entire structure of the display device is more compact and thinner in size.

[0028] FIGS. 2-4 are refraction index comparison diagrams of a light guide plate having three dielectric layers (Sample A in the figures) and a light guide plate composed of coating sliver on bottom of the glass (Sample B in the figures) at different incident angles and under conditions of different incident wavelength according to embodiments of the present disclosure. The incident light source is a LED light source, and the incident surface is the glass surface on top of the guide light plate.

[0029] As shown in FIG. 2, when the incident angle is 0°, the average reflective index of the light of Sample A within a wavelength range of 435 nm-680 nm reaches to 99.28%, while under the same condition, the average reflective index of light of Sample B is 97.76%, thus it can be seen that the reflective index of the light guide plate (i.e. Sample A) is increased by 1.52% compared with the sliver coated light guide plate (i.e. Sample B).

[0030] As shown in FIG. 3, when the incident angle is 30°, the average reflective index of the light of Sample A within a wavelength range of 435 nm-680 nm reaches to 99.23%, while under the same condition, the average reflective index of light of Sample B is 96.11%, thus it can be seen that the reflective index of the light guide plate (i.e. Sample A) is increased by 3.12% compared with the sliver coated light guide plate (i.e. Sample B).

[0031] As shown in FIG. 4, when the incident angle is 70°, the average reflective index of the light of Sample A within a wavelength range of 435 nm-680 nm reaches to 98.85%, while under the same condition, the average reflective index of light of Sample B is 97.29%, thus it can be seen that the reflective index of the light guide plate (i.e. Sample A) is increased by 1.56% compared with the sliver coated light guide plate (i.e. Sample B).

[0032] Therefore, the light guide plate according to the embodiment of the present disclosure achieves better reflection effect compared with common light guide plate and the reflective layer of which the glass surface is coated with sliver, and it is not only good for ultra-thin of the display device, also can improve light utilization and brightness of the light guide plate obviously, and the display effect of the display device may be more excellent.

[0033] The above statements are only the specific embodiments of the present application, it should be noted that, to those ordinary skilled in the art, several improvements and modifications can be made without departing from the principle of the present application, also those improvements and modifications polish should be considered as being within protection scope of the present application.