High-brightness light guide plate

Abstract

The utility model belongs to the technical field of light guide plates, and particularly relates to a high-brightness light guide plate, which comprises a light guide main body and at least one side reflection part, the side reflection part is connected to at least one side surface of the light guide main body; a reflecting curved surface is arranged on one side surface, facing the light guide main body, of the side reflecting part; at least one mounting groove is formed in the light guide main body; and the mounting groove is used for mounting a light source body. The brightness value of the light guide plate can be improved, and the utilization rate of light is guaranteed.

Description

Technical Field

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

[0002] With the development of electronic information technology, the overall trend of electronic circuits is towards integration and planarization, which puts forward requirements for electronic components in terms of chip-type, miniaturization, high precision, consistency, reliability and adaptability to surface assembly. Liquid crystal display devices (TFT-LCD) have replaced cathode displays due to their low radiation, thin and small size, and low power consumption, and have become the mainstream of the market. Mobile phones, tablets, televisions, computer monitors, control display devices, 3C products, etc., all use liquid crystal display devices as display tools. The composition of liquid crystal displays mainly includes two parts: liquid crystal panel and backlight module. Among them, the backlight module is an important component of liquid crystal display, and the most critical part of the entire backlight module is the light guide plate. The technical principle of the light guide plate comes from the total reflection of light, and the light propagating inside it will undergo total reflection.

[0003] However, when most of the existing light guide plates are input with light from the light source, part of the light will irradiate from the side end of the light guide plate into the shell of the backlight module and cannot be reflected back to the light emitting part of the light guide plate, thus causing partial light loss and reducing the overall brightness value and reducing the utilization rate of the light. Utility Model Content

[0004] The purpose of the utility model is to provide a high-brightness light guide plate to address the deficiencies of the prior art, and to solve the technical problem that part of the light passing through the light guide plate is lost and the overall brightness value is reduced.

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

[0006] A high-brightness light guide plate comprises a light guide body and at least one side reflection portion; the side reflection portion is connected to at least one side surface of the light guide body; and the side reflection portion is provided with a reflective curved surface facing a side surface of the light guide body; at least one mounting groove is provided in the light guide body; the mounting groove is used to mount a light source body.

[0007] Preferably: the light guide body comprises a light incident layer, a light transmissive layer and a light emitting layer which are sequentially connected from bottom to top; and the mounting groove is connected to the bottom of the light incident layer; the side reflector is connected to at least one part of the light incident layer, the light transmissive layer and the light emitting layer.

[0008] Preferably: the mounting groove comprises a square segment and an arc segment which are arranged in sequence; and the square segment is used to mount a mounting seat of the light source body; and the arc segment is used to mount an irradiation portion of the light source body.

[0009] Preferably: the surface of the light emitting layer is provided with continuously arranged light guiding protrusions; the light guiding protrusions are arranged outwardly away from the light transmitting layer.

[0010] Preferably: the reflective curved surface is arranged toward the light-transmitting layer;

[0011] And / or the lowest point of the reflective arc surface extends to the lowest point of the arc segment.

[0012] Preferably, the distance between two adjacent installation grooves is L; L satisfies: 0.5 cm ≤ L ≤ 1.2 cm.

[0013] Preferably: a reflective layer is provided on the surface of the reflective curved surface.

[0014] Preferably: the reflective curved surface comprises a reflective straight surface and a reflective arc surface connected to each other; and the reflective arc surface is arranged close to the light incident layer relative to the reflective straight surface; and the reflective straight surface is arranged close to the light emitting layer relative to the reflective arc surface.

[0015] Preferably, an inclination angle formed between the reflecting straight surface and a vertical surface corresponding to the reflecting straight surface is α, and α satisfies: 0°≤α≤35°.

[0016] Preferably, the central angle corresponding to the reflective arc surface is β; β satisfies: 5°≤β≤40°.

[0017] The beneficial effect of the utility model is that the technical solution can reflect the light of the light source body in the installation groove to the desired direction as much as possible through the reflective curved surface in the side reflection part of the side end, increase the amount of light irradiation, thereby improving the brightness value of the light guide plate and ensuring the utilization rate of the light. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The following will refer to the attached Figures 1 to 4 To describe the features, advantages and technical effects of exemplary embodiments of the present utility model.

[0019] Figure 1 A cross-sectional view of a high-brightness light guide plate according to an embodiment of the utility model;

[0020] Figure 2 This is a schematic structural diagram of a side reflective portion of a high-brightness light guide plate according to an embodiment of the utility model;

[0021] Figure 3 This is a schematic structural diagram of a side reflective portion of a high-brightness light guide plate according to an embodiment of the utility model;

[0022] Figure 4 The figure is a structural schematic diagram of a light guide body of a high-brightness light guide plate according to an embodiment of the utility model.

[0023] In the figure: 1-light guide body; 11-light emitting layer; 111-light guide protrusion; 12-light transmitting layer; 13-light entering layer; 131-installation groove; 1311-arc segment; 1312-square segment; 14-positioning block; 2-side reflection part; 21-reflection curved surface; 211-reflection straight surface; 212-reflection arc surface; 22-reflection layer; 23-positioning groove; 3-adhesive component. DETAILED DESCRIPTION

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0025] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0026] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0027] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there may be three relationships. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and multiple situations exist alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0028] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0029] The following is combined with Figure 1 to Figure 4 The utility model is further described in detail, but it is not intended to limit the utility model.

[0030] like Figure 1 As shown, in one embodiment of the utility model, the high-brightness light guide plate comprises a light guide body 1 and at least one side reflection part 2; the side reflection part 2 is connected to at least one side surface of the light guide body 1; and the side reflection part 2 is provided with a reflection curved surface 21 facing a side surface of the light guide body 1; the side reflection part 2 is used to be connected to the shell of the backlight module; at least one installation groove 131 is provided in the light guide body 1; the installation groove 131 is used to install the light source body.

[0031] The technical solution of the utility model can reflect the light of the light source body in the installation groove 131 to the desired direction as much as possible through the reflective curved surface 21 in the side reflective part 2 at the side end, increase the amount of light irradiation, thereby improving the brightness value of the light guide plate and ensuring the utilization rate of light.

[0032] In some embodiments, the side reflector 2 is disposed around the side end of the light guide body 1. That is, the light irradiated from the light source to the edge can be reflected as much as possible through the side reflector 2 disposed around the periphery, reducing the irradiation into the housing of the backlight module, thereby increasing the amount of light output, improving the overall brightness, and improving the utilization rate of light.

[0033] Specifically, in some embodiments, Figure 1 As shown, the light guide body 1 includes a light incident layer 13, a light transmissive layer 12 and a light emitting layer 11 which are sequentially connected from bottom to top; and the mounting groove 131 is connected to the bottom of the light incident layer 13; the side reflector 2 is connected to at least one part of the light incident layer 13, the light transmissive layer 12 and the light emitting layer 11. Among them, the light incident layer 13, the light transmissive layer 12 and the light emitting layer 11 are fixedly formed as a whole. In other words, through the irradiation of multiple light sources of the light incident layer 13, the light passing through the light transmissive layer 12 and the light emitting layer 11, and the side reflector 2, the light transmissive layer 12 and the light emitting layer 11 can converge the light to the light emitting layer as much as possible, thereby improving the overall brightness and improving the utilization rate of light.

[0034] Specifically, in some embodiments, Figure 1 and 2As shown, the reflective curved surface 21 includes a reflective straight surface 211 and a reflective arc surface 212 connected to each other; and the reflective arc surface 212 is close to the light incident layer 13 relative to the reflective straight surface 211; the reflective straight surface 211 is set close to the light emitting layer 11 relative to the reflective arc surface 212. That is, the light directly irradiated to its surface is reflected to the light emitting layer 11 as much as possible through the reflective arc surface 212 relative to the bottom. If the upper half is also set as an arc-shaped reflective surface, a certain range of dead angles will appear, so it is necessary to avoid the appearance of dead angles through the reflective straight surface 211, so as to converge the light to the light emitting layer as much as possible, thereby improving the overall brightness and improving the utilization rate of light.

[0035] Specifically, in some embodiments, Figure 2 and 3 As shown, the inclination angle formed between the reflective surface 211 and the vertical surface corresponding to the reflective surface 211 is α, and α satisfies: 0°≤α≤35°; preferably 0°, 10°, 20° and 30°, etc. This structure can focus the light to the light-emitting layer as much as possible through a relatively small range of inclination angles, thereby improving the overall brightness and the utilization rate of light.

[0036] Specifically, in some embodiments, Figure 2 and 3 As shown, the central angle corresponding to the reflective arc surface 212 is β; β satisfies: 5°≤β≤40°; preferably 5°, 10°, 20°, 30°, and 35°. This structure can converge light to the light-emitting layer as much as possible through a relatively small range of central angles, thereby improving the overall brightness and the utilization rate of light. When the central angle is too large, reflection will occur in the direction of the light source itself during the reflection process, resulting in a decrease in the amount of reflection; when the central angle is too small, reflection will not be able to be reflected in the direction of the light-emitting layer during the reflection process, resulting in a decrease in the amount of reflection.

[0037] Specifically, in some embodiments, Figure 1 and 2 As shown, the reflective curved surface 21 is provided with a reflective layer 22. The reflective layer 22 is a reflective aluminum sheet or a reflective coating material (the reflective coating material can be a conventional coating spray paint with reflective light, etc., which is not limited here). The reflective aluminum sheet or the reflective coating material can improve the light reflection efficiency and amount, thereby improving the overall brightness and improving the utilization rate of light.

[0038] Specifically, in some embodiments, Figure 3 and 4 As shown, an adhesive component 3 is provided between the light guide body 1 and the side reflector 2. The adhesive component 3 is solid glue or fixing glue, etc. This structure can improve the assembly stability between the light guide body 1 and the side reflector 2, thereby ensuring the stability of use.

[0039] Specifically, in some embodiments, Figure 3 and 4 As shown, a positioning block 14 is provided at one side end of the light guide body 1 facing the side reflector 2; a positioning groove 23 corresponding to the positioning block 14 is provided in the side reflector 2. The positioning block 14 can be a cylindrical positioning block or a square positioning block, which is not limited here. In other words, after solid glue or fixed glue is assembled between the light guide body 1 and the side reflector 2, the positioning block 14 is clamped in the positioning groove 23, so that the dual assembly function between the light guide body 1 and the side reflector 2 can be achieved, thereby improving the assembly stability between the light guide body 1 and the side reflector 2, thereby ensuring the stability of use.

[0040] Specifically, in some embodiments, Figure 4 As shown, the distance between two adjacent mounting grooves 131 is L; L satisfies: 0.5cm≤L≤1.2cm. The mounting grooves 131 with a gap between 0.5cm and 1.2cm can effectively reduce the black spot area (i.e., the blind area) of the light guide plate, thereby improving the light guide efficiency of the light guide plate.

[0041] Specifically, in some embodiments, Figure 4 As shown, the mounting groove 131 includes a square segment 1312 and an arc segment 1311 which are sequentially arranged from the light incident layer 13 toward the light transmission layer 12; and the square segment 1312 is used to install the mounting seat of the light source body; the arc segment 1311 is used to install the irradiation part of the light source body. In other words, the structure assembles the mounting seat of the light source body to the inside through the square segment 1312, and then irradiates toward the arc segment 1311 through the irradiation part of the installed light source body, thereby ensuring the irradiation effect of the arc segment 1311, reducing the light that is irradiated in the horizontal direction but cannot be reflected to the light exiting layer, thereby improving the light reflection efficiency and amount, thereby improving the overall brightness, and improving the utilization rate of light.

[0042] Specifically, in some embodiments, Figure 1 and 4 As shown, the reflective curved surface 21 is disposed toward the light-transmitting layer 12, and the lowest point of the reflective arc surface 212 in the reflective curved surface 21 extends to the lowest point of the arc segment 1311 in the mounting groove 131. In other words, by extending the reflective arc surface 212 to the arc segment 1311, as much light scattered from the mounting groove 131 as possible can be reflected to the light-emitting layer 11, thereby reducing the light consumption.

[0043] Specifically, in some embodiments, Figure 4 As shown, the surface of the light emitting layer 11 is provided with continuously arranged light guiding bumps 111 ; the light guiding bumps 111 are arranged outwardly away from the light transmitting layer 11 .

[0044] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode includes only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

[0045] According to the disclosure and teaching of the above description, the technicians in the field of the utility model can also change and modify the above implementation. Therefore, the utility model is not limited to the above specific implementation, and any obvious improvement, replacement or modification made by the technicians in this field on the basis of the utility model belongs to the protection scope of the utility model. In addition, although some specific terms are used in this specification, these terms are only for the convenience of explanation and do not constitute any limitation to the utility model.

Claims

1. A high brightness light guide plate, characterized in that: It includes a light guide body and at least one side reflection part; the side reflection part is connected to at least one side surface of the light guide body; and the side reflection part is provided with a reflection curved surface on a side surface facing the light guide body; at least one installation groove is provided in the light guide body; the installation groove is used to install the light source body.

2. The high brightness light guide plate according to claim 1, characterized in that: The light-guiding body comprises a light-entering layer, a light-transmitting layer and a light-emitting layer which are sequentially connected from bottom to top; and the mounting groove is connected to the bottom of the light-entering layer; and the side reflection portion is connected to at least one part of the light-entering layer, the light-transmitting layer and the light-emitting layer.

3. The high brightness light guide plate according to claim 2, characterized in that: The mounting groove comprises a square segment and an arc segment which are arranged in sequence; and the square segment is used to mount a mounting seat of the light source body; and the arc segment is used to mount an irradiation portion of the light source body.

4. The high brightness light guide plate according to claim 2, characterized in that: The surface of the light emitting layer is provided with continuously arranged light guiding protrusions; the light guiding protrusions are arranged outwardly away from the light transmitting layer.

5. The high brightness light guide plate according to claim 3, characterized in that: The reflective curved surface is arranged toward the light-transmitting layer.

6. The high brightness light guide plate according to claim 1, characterized in that: The distance between two adjacent installation grooves is L; L satisfies: 0.5cm≤L≤1.2cm.

7. The high brightness light guide plate according to claim 1, characterized in that: A reflective layer is provided on the surface of the reflective curved surface.

8. The high brightness light guide plate according to claim 3, characterized in that: The reflective curved surface includes a reflective straight surface and a reflective arc surface connected to each other; and the reflective arc surface is arranged close to the light incident layer relative to the reflective straight surface; and the reflective straight surface is arranged close to the light exiting layer relative to the reflective arc surface; The lowest point of the reflective arc surface extends to the lowest point of the arc segment.

9. The high brightness light guide plate according to claim 8, characterized in that: An inclination angle formed between the reflection straight surface and a vertical surface corresponding to the reflection straight surface is α, and α satisfies: 0°≤α≤35°.

10. The high brightness light guide plate according to claim 8, characterized in that: The central angle corresponding to the reflective arc surface is β; β satisfies: 5°≤β≤40°.

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