Light guide plate capable of uniformly emitting light

Abstract

The utility model belongs to the technical field of light guide plates, and particularly relates to a light guide plate capable of uniformly emitting light, which comprises a light emitting layer, a light transmitting layer and a light incident layer, the light-emitting layer, the light-transmitting layer and the light-entering layer are sequentially stacked from top to bottom; at least one mounting groove is formed in the bottom of the light incident layer; the mounting groove is used for mounting a light source body; the mounting groove comprises an arc-shaped light incident surface and a horizontal straight light incident surface which are connected with each other; and at least one light-emitting bulge is arranged on the light-emitting layer. According to the utility model, the light emitting uniformity is better, the light stability is stronger, and the irradiation effect and efficiency are improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of light guide plates, and in particular relates to a light guide plate with uniform light output. 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, the larger the size of most existing light guide plates, the more difficult it is to achieve light uniformity and the lower the light utilization rate. Utility Model Content

[0004] The purpose of the utility model is to provide a light guide plate with uniform light output in view of the deficiencies of the prior art, which can solve any of the above-mentioned technical problems.

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

[0006] A light guide plate with uniform light output, comprising a light output layer, a light transmissive layer and a light incident layer; the light output layer, the light transmissive layer and the light incident layer are stacked in sequence from top to bottom; and at least one mounting groove is provided at the bottom of the light incident layer; the mounting groove is used to install a light source body; the mounting groove comprises an arc-shaped light incident surface and a horizontal straight light incident surface connected to each other; and at least one light output protrusion is provided on the light output layer.

[0007] Preferably: the arc-shaped light incident surface is arranged around the side end of the horizontal straight light incident surface; and the arc-shaped light incident surface is arranged to be recessed toward the light incident layer body.

[0008] Preferably: the mounting groove comprises a square segment and an arc segment arranged in sequence; the arc-shaped light incident surface and the horizontal straight light incident surface are arranged on the inner wall of the arc-shaped segment; and the square segment is used to install the mounting seat of the light source body; the arc segment is used to install the irradiation part of the light source body.

[0009] Preferably: the light-emitting protrusion is a protrusion with a triangular cross section;

[0010] The angle between the two hypotenuses of the protrusion of the cross-sectional triangle is μ; μ satisfies: 30°≤μ≤60°.

[0011] Preferably: a groove penetrating the thickness of the light emitting protrusion is provided inside the light emitting protrusion.

[0012] Preferably: the surface of the light emitting layer is further provided with at least one light emitting straight area; the light emitting straight area and the light emitting convex straight lines are arranged alternately;

[0013] Furthermore, a projection of the straight light-emitting area toward the mounting groove is arranged to coincide with the horizontal straight light-incoming surface.

[0014] Preferably: a side end of the light-transmitting layer and / or the light-incident layer is provided with a reflective curved side surface; and a surface of the reflective curved side surface is provided with a reflective outer layer.

[0015] Preferably: the reflective curved side surface comprises a reflective oblique straight surface and a reflective arc surface which are arranged in sequence; the reflective arc surface is arranged close to the light incident layer relative to the reflective oblique straight surface.

[0016] Preferably, an inclination angle formed between the reflective oblique surface and a vertical surface corresponding to the reflective surface is α, and α satisfies: 5°≤α≤20°.

[0017] Preferably, the central angle corresponding to the reflective arc surface is β; β satisfies: 5°≤β≤40°.

[0018] The beneficial effect of the utility model is that the technical solution adopts the curved surface guidance of the arc-shaped light incident surface and the vertical guidance of the horizontal straight light incident surface to guide the light emitted by the light source, so as to adjust the irradiation direction of the light as effectively as possible, so that it can be irradiated as evenly as possible toward the light output layer; combined with the light output protrusion of the light output layer, the uniformity of the light output can be further improved, thereby achieving better light output uniformity, stronger light stability, and improved irradiation effect and efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] 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.

[0020] Figure 1 A cross-sectional view of a light guide plate with uniform light output according to an embodiment of the utility model;

[0021] Figure 2 This is a partial enlarged view of a light guide plate with uniform light output according to an embodiment of the utility model;

[0022] Figure 3 This is a partial enlarged view of a light guide plate with uniform light output according to an embodiment of the utility model;

[0023] Figure 4 This is a partial enlarged view of a light guide plate with uniform light output according to an embodiment of the utility model.

[0024] In the figure: 1-light emitting layer; 11-light emitting protrusion; 12-groove; 13-light emitting straight area; 2-light-transmitting layer; 3-light-entering layer; 31-mounting groove; 311-curved section; 312-square section; 313-arc-shaped light-entering surface; 314-horizontal straight light-entering surface; 4-reflective curved side surface; 41-reflective oblique straight surface; 42-reflective arc surface; 5-reflective outer layer; 6-positioning protrusion. DETAILED DESCRIPTION

[0025] 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.

[0026] 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.

[0027] 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.

[0028] 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.

[0029] 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.

[0030] 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.

[0031] like Figure 1 and 2 As shown, in one embodiment of the utility model, the light guide plate with uniform light output comprises a light output layer 1, a light transmission layer 2 and a light input layer 3; the light output layer 1, the light transmission layer 2 and the light input layer 3 are stacked in sequence from top to bottom; and at least one mounting groove 31 is provided at the bottom of the light input layer 3; the mounting groove 31 is used to install the light source body; the mounting groove 31 comprises an arc-shaped light input surface 313 and a horizontal straight light input surface 314 connected to each other; at least one light output protrusion 11 is provided on the light output layer 1.

[0032] The technical solution of the utility model adopts the curved surface guidance of the arc-shaped light incident surface 313 and the vertical guidance of the horizontal straight light incident surface 314 to guide the light emitted by the light source, so as to adjust the irradiation direction of the light as effectively as possible, so that it can be irradiated as evenly as possible toward the light emitting layer; combined with the light emitting protrusion 11 of the light emitting layer, the uniformity of the light can be further improved, thereby achieving better light uniformity, stronger light stability, and improved irradiation effect and efficiency.

[0033] Wherein, in some embodiments, Figure 1 As shown, the arc-shaped light-entering surface 313 is arranged around the side end of the horizontal straight light-entering surface 314; and the arc-shaped light-entering surface 313 is arranged concavely toward the main body of the light-entering layer 3. In other words, the light at the center of the light source body is straight, that is, it is kept straight through the horizontal straight light-entering surface 314; because the two ends of the light source body are divergently illuminated, the arc-shaped light-entering surface 313 that needs to be concavely arranged is used to adjust the oblique light to be transmitted as close to parallel as possible; thereby improving the uniformity of illumination.

[0034] Specifically, in some embodiments, Figure 1 and 2As shown, the mounting groove 31 includes a square segment 312 and an arc segment 311 arranged in sequence; an arc-shaped light-entering surface 313 and a horizontal straight light-entering surface 314 are arranged on the inner wall of the arc segment 311; and the square segment 312 is used to install the mounting seat of the light source body; the arc segment 311 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 312, and then irradiates toward the arc segment 311 through the irradiation part of the light source body, thereby ensuring the irradiation effect of the arc segment 311, reducing the light that is irradiated in the horizontal direction but cannot be reflected to the light-emitting layer, thereby improving the light reflection efficiency and amount, thereby improving the overall brightness, and improving the utilization rate of light.

[0035] Specifically, in some embodiments, Figure 1 and 3 As shown, the light-emitting protrusion 11 is a protrusion with a triangular cross section. Figure 3 As shown, the angle between the two hypotenuses of the protrusion of the cross-section triangle is μ; μ satisfies: 30°≤μ≤60°; preferably: 30°, 40°, 45° and 60°, etc. This structure refracts and guides the non-linear reverse light through the two hypotenuses of the triangle, which is beneficial to improve the uniformity of the light and improve the irradiation efficiency.

[0036] Specifically, in some embodiments, Figure 1 and 3 As shown, the light emitting protrusion 11 is provided with a groove 12 that runs through the thickness of the light emitting protrusion 11. This structure can make the surface of the light emitting layer 1 have grooves that are conducive to reflecting the light reflected by the oblique surface to emit forward, so that the brightness of the light emitted from the emission end of the light emitting layer 1 can be more uniform.

[0037] Specifically, in some embodiments, Figure 1 and 3 As shown, at least one straight light-emitting area 13 is further provided on the surface of the light-emitting layer 1; the straight light-emitting area 13 and the light-emitting protrusion 11 are arranged in a straight line and staggered; and the projection of the straight light-emitting area 13 toward the mounting groove 31 is arranged to coincide with the horizontal straight light-incoming surface 314. In other words, the straight light irradiated by the horizontal straight light-incoming surface 314 can stably and straightly emit from the straight light-emitting area 13 (one route of the light-emitting direction A), thereby ensuring the light-emitting stability and uniformity of the straight light.

[0038] Specifically, in some embodiments, Figure 1 and 2As shown, the side ends of the light-transmitting layer 2 and / or the light-incoming layer 3 are provided with a reflective curved side surface 4; and the surface of the reflective curved side surface 4 is provided with a reflective outer layer 5. Among them, the reflective outer layer 5 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 efficiency and amount of light reflection, reduce the light diverging to both sides, thereby improving the overall brightness and improving the utilization rate of light.

[0039] Specifically, in some embodiments, Figure 1 As shown, the reflective curved side surface 4 includes a reflective oblique straight surface 41 and a reflective arc surface 42 arranged in sequence; the reflective arc surface 42 is arranged closer to the light incident layer 3 relative to the reflective oblique straight surface 41. This structure can effectively increase the amount of light reflected to the light exiting layer by reflecting light from the curved surface of the bottom reflective arc surface 42 and reflecting light from the flat surface of the top reflective oblique straight surface 41, and reduce multiple reflections of light to the light incident layer 3, thereby improving the intensity and uniformity of the light exiting, and improving the utilization rate of light.

[0040] Specifically, in some embodiments, Figure 4 As shown, the inclination angle formed between the reflective oblique surface 41 and the vertical surface corresponding to the reflective surface 41 is α, and α satisfies: 5°≤α≤20°; preferably 5°, 8°, 15°, 18°, 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.

[0041] Specifically, in some embodiments, Figure 4 As shown, the central angle corresponding to the reflective arc surface 42 is β; β satisfies: 5°≤β≤40°; preferably 0°, 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.

[0042] Specifically, in some embodiments, Figure 1 As shown, a positioning protrusion 6 is provided at the side end of the light emitting layer 1 and / or the side end of the light incident layer 3. The convex assembly function of the positioning protrusion 6 is conducive to improving the assembly convenience between the light guide plate and the optical module.

[0043] 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.

[0044] 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 light guide plate with uniform light output, characterized in that: It includes a light emitting layer, a light transmitting layer and a light incident layer; the light emitting layer, the light transmitting layer and the light incident layer are stacked in sequence from top to bottom; and at least one mounting groove is provided at the bottom of the light incident layer; the mounting groove is used to install a light source body; the mounting groove includes an arc-shaped light incident surface and a horizontal straight light incident surface connected to each other; and at least one light emitting protrusion is provided on the light emitting layer.

2. The light guide plate with uniform light output according to claim 1, characterized in that: The arc-shaped light incident surface is arranged around the side end of the horizontal straight light incident surface; and the arc-shaped light incident surface is arranged to be recessed toward the light incident layer body.

3. The light guide plate with uniform light output according to claim 1 or 2, characterized in that: The mounting groove includes a square segment and an arc segment arranged in sequence; the arc-shaped light incident surface and the horizontal straight light incident surface are arranged on the inner wall of the arc segment; and the square segment is used to install the mounting seat of the light source body; the arc segment is used to install the irradiation part of the light source body.

4. The light guide plate with uniform light output according to claim 1, characterized in that: The light-emitting protrusion is a protrusion with a triangular cross section; The angle between the two hypotenuses of the convexity of the cross-sectional triangle is μ; μ satisfies: 30 º≤μ≤60º.

5. The light guide plate with uniform light output according to claim 1 or 4, characterized in that: A groove penetrating through the thickness of the light emitting protrusion is provided inside the light emitting protrusion.

6. The light guide plate with uniform light output according to claim 1 or 4, characterized in that: The surface of the light emitting layer is also provided with at least one straight light emitting area; the straight light emitting area and the light emitting protrusions are arranged in a staggered manner; Furthermore, a projection of the straight light-emitting area toward the mounting groove is arranged to coincide with the horizontal straight light-incoming surface.

7. The light guide plate with uniform light output according to claim 1, characterized in that: A reflective curved side surface is provided at a side end of the light-transmitting layer and / or the light-incident layer; and a reflective outer layer is provided on a surface of the reflective curved side surface.

8. The light guide plate with uniform light output according to claim 7, characterized in that: The reflective curved side surface includes a reflective oblique straight surface and a reflective arc surface which are arranged in sequence; the reflective arc surface is arranged close to the light incident layer relative to the reflective oblique straight surface.

9. The light guide plate with uniform light output according to claim 8, characterized in that: An inclination angle formed between the reflecting oblique straight surface and a vertical surface corresponding to the reflecting oblique straight surface is α, and α satisfies: 5°≤α≤20°.

10. The light guide plate with uniform light output according to claim 8 or 9, characterized in that: The central angle corresponding to the reflecting arc surface is β; β satisfies: 5°≤β≤40°.

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