Light guide plate and area light source structure
Through the light guide groove and light guide tooth structure of the light guide plate, multiple reflections are achieved using a single LED, which solves the high cost problem of multiple LEDs in the existing technology, achieves efficient and uniform lighting effects and reduces product costs.
Patent Information
- Application Number
- CN202422553769.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-22
- Publication Date
- 2025-09-26
- Estimated Expiration
- 2034-10-22
AI Technical Summary
Existing surface light source products require multiple LEDs to achieve uniform illumination, which is very costly.
The light guide plate design, including light guide grooves and light guide tooth structures, is adopted to achieve multiple reflections of light through a single LED light source. The light guide grooves and reflective surfaces are used to distribute the light to the entire luminous surface, reducing the number of LEDs and improving light efficiency.
The entire luminous surface can be illuminated by a single LED, which reduces the number of LEDs and PCBA area, reduces costs, and at the same time improves light utilization efficiency and ensures uniformity of the luminous effect.
Smart Images
Figure CN223388459U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of luminescence, in particular to a light guide plate and a surface light source structure, and in particular to a light guide plate and a single-lamp surface light source structure. Background Art
[0002] See also Figure 1 ,like Figure 1 As shown, existing surface light source products usually use an array of multiple LEDs 100 arranged on one side of a light guide plate 200, and then light up the entire light-emitting surface through the light guide teeth 201 to achieve a uniform lighting effect on the entire surface. This solution requires the arrangement of multiple LEDs to achieve a uniform illumination effect, which is relatively costly.
[0003] Therefore, it is necessary to provide a new technical solution. Utility Model Content
[0004] To solve the technical problems existing in the prior art, the present invention discloses a light guide plate and a surface light source structure, which can effectively reduce the number of LEDs, reduce costs, and achieve a uniform lighting effect. The specific technical solution is as follows:
[0005] In one aspect, the present invention provides a light guide plate, which includes a light guide plate body,
[0006] The light guide plate body is a flat plate having a first surface, a second surface, and a side surface connecting the first surface and the second surface, wherein the first surface and the second surface are opposite to each other.
[0007] A light guide groove and a plurality of light guide teeth are formed on the first surface. The light guide groove is formed concavely from the first surface to the second surface. The light guide groove is close to a side surface of the light guide plate body.
[0008] Light enters the light guide plate body through the second surface and irradiates the light guide groove. The light guide groove reflects part of the light to the light guide teeth, and the light guide teeth reflect the light to the second surface.
[0009] Furthermore, the light guide plate body further has a reflective surface, the reflective surface is formed on a side surface of the light guide plate body, and the light guide groove is close to the reflective surface.
[0010] The light enters the light guide plate body through the second surface and irradiates the light guide groove. The light guide groove reflects part of the light to the reflection surface, and the reflection surface reflects the light twice to the light guide teeth.
[0011] Furthermore, the reflective surface protrudes outward from one side of the light guide plate body in an arc shape.
[0012] Furthermore, the light guide groove is a tapered groove, the depth of the tapered groove is greater than the depth of the light guide tooth, and the opening size of the tapered groove is greater than the opening size of the light guide tooth.
[0013] Furthermore, the shape of the light guide teeth is one or more combinations of circular, semicircular, elliptical, triangular prism, conical, quadrangular pyramid and rhombus; or
[0014] The shape of the light guide teeth is a micro-pattern shape; or
[0015] The light guide teeth are in the shape of long strips, are arranged in parallel, and penetrate the light guide plate body along the width direction of the light guide plate body.
[0016] Furthermore, the light guide teeth are in the shape of long strips, the long strips of light guide teeth are arranged in parallel, and the long strips of light guide teeth penetrate the light guide plate body along the width direction of the light guide plate body.
[0017] Furthermore, the plurality of light guide teeth are distributed in an array.
[0018] Furthermore, the light guiding groove is a semi-conical groove formed in a cross section from the first surface to the second surface.
[0019] On the other hand, the present invention also provides a surface light source structure, which includes a light source and the light guide plate described in the above aspect, wherein the light source is a single point light source, and the light source faces the light guide groove from one side of the second surface.
[0020] Furthermore, the central axis of the light source coincides with the central axis of the light guide groove.
[0021] Furthermore, the light source is a single LED.
[0022] The utility model has the following beneficial effects:
[0023] (1) The light guide plate and surface light source structure of the present invention can illuminate the entire light output panel by arranging light guide teeth, by arranging only one LED, effectively reducing the number of LEDs without increasing the number of parts, while reducing the size of the PCBA area and greatly reducing the cost of the product.
[0024] (2) The light guide plate and surface light source structure of the present invention is such that the LED light is irradiated on the conical groove formed by the rotating parabola of the light guide plate and is reflected once, wherein a part of the light directly reaches the position of the light guide teeth and illuminates the entire surface through the micro pattern formed by the light guide teeth, and the other part of the light reaches the position of the reflecting surface and is reflected twice by the reflecting surface, and the secondary reflected light reflected by the reflecting surface also reaches the position of the light guide teeth and illuminates the entire surface through the light guide teeth, thereby distributing the light emitted by the LED to the entire light-emitting surface, thereby realizing the luminescence of the surface light source.
[0025] (3) The light guide plate and surface light source structure of the present invention, wherein the light emitted by the LED is divided into primary reflected light and secondary reflected light, the primary reflected light directly reaching the light guide teeth accounts for half of the luminous flux of the LED, and the secondary reflected light reaching the light guide teeth also accounts for half of the luminous flux of the LED, thereby realizing efficient utilization of LED light.
[0026] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS
[0027] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.
[0028] Figure 1 It is a schematic diagram of a surface light source structure in the prior art;
[0029] Figure 2 This is a perspective schematic diagram of the surface light source structure of the utility model in the first embodiment;
[0030] Figure 3 for Figure 2 Schematic top view of
[0031] Figure 4 for Figure 2 A side view schematic diagram of
[0032] Figure 5 This is a schematic diagram of the direction of light in the light guide plate in the first embodiment of the present utility model;
[0033] Figure 6 This is a schematic diagram of the direction of light after being reflected by the reflective surface of the light guide plate in the first embodiment of the present utility model;
[0034] Figure 7 This is a schematic structural diagram of the surface light source structure of the utility model in the second embodiment;
[0035] Figure 8 This is a schematic structural diagram of the surface light source structure of the utility model in the third embodiment.
[0036] Among them, 1-light guide plate body, 2-light source, 11-first surface, 12-second surface, 13-side surface, 14-reflection surface, 3-light guide groove, 31-light guide groove surface, 4-light guide tooth, 5-long strip light guide tooth, 6-semi-conical groove. DETAILED DESCRIPTION
[0037] The following describes in detail embodiments of the present invention, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present invention, and should not be construed as limiting the present invention.
[0038] In the description of this utility model, it should be understood that the terms "upper," "lower," "top," "bottom," "inner," "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In the description of this utility model, "plurality" means two or more, unless otherwise expressly and specifically defined.
[0039] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, the connection may be fixed, detachable, or integrated; it may be mechanical or electrical; it may be directly connected or indirectly connected through an intermediate medium; it may refer to internal communication between two components or interaction between two components. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to the specific circumstances.
[0040] See also Figures 2 to 8 , Figure 2 This is a perspective schematic diagram of the surface light source structure of the utility model in the first embodiment; Figure 3 for Figure 2 Schematic top view of Figure 4 for Figure 2 A side view schematic diagram of Figure 5 This is a schematic diagram of the direction of light in the light guide plate in the first embodiment of the present utility model; Figure 6 This is a schematic diagram of the direction of light after being reflected by the reflective surface of the light guide plate in the first embodiment of the present utility model; Figure 7 This is a schematic structural diagram of the surface light source structure of the utility model in the second embodiment; Figure 8 This is a schematic structural diagram of the surface light source structure of the third embodiment of the present invention.
[0041] See also Figures 2 to 4In this embodiment, the light guide plate includes a light guide plate body 1. The light guide plate body 1 is a flat plate having a first surface 11, a second surface 12, and a side surface 13 connecting the first surface 11 and the second surface 12. The first surface 11 and the second surface 12 are opposite to each other.
[0042] A light guide groove 3 and a plurality of light guide teeth 4 are formed on the first surface 11. The light guide groove 3 is formed concavely from the first surface 11 to the second surface 12 and is close to a side surface of the light guide plate body 1. The plurality of light guide teeth 4 are distributed in an array.
[0043] A reflective surface 14 is formed on one side of the light guide plate body 1. The reflective surface 14 protrudes outward from one side of the light guide plate body 1 in an arc shape, and the light guide groove 3 is close to the reflective surface 14. The arc-shaped reflective surface 14 of the present invention can reflect light reflected from the light guide groove into more parallel light that reaches the light guide teeth, thereby improving the overall luminous effect of the light guide plate.
[0044] In the first embodiment of the light guide plate, the light guide groove 3 is a conical groove, the depth of the conical groove is greater than the depth of the light guide tooth 4, and the opening size of the conical groove is greater than the opening size of the light guide tooth 4, so that the light guide groove surface 31 can receive more light for reflection, thereby improving the overall luminous effect of the light guide plate.
[0045] In this first embodiment, the light guide teeth 4 are semicircular in shape. In other embodiments, the light guide teeth may be shaped in a shape including, but not limited to, a circle, a semicircle, an ellipse, a triangular prism, a cone, a quadrangular pyramid, and a rhombus, or a combination thereof. In other embodiments, the light guide teeth may also be shaped in other micro-patterns.
[0046] See also Figure 5 and Figure 6 . Figure 5 The dotted line in represents the path along which part of the light emitted by the light source propagates on the surface of the light guide groove 31 . Figure 6 The dotted line in the figure represents the propagation path of the light reflected from the light guide groove surface 31 to the reflective surface 14, and the solid line represents the propagation path of the partially parallel light after the light is reflected from the reflective surface. The light emitted by the light source 2 enters the light guide plate body 1 through the second surface 12 and irradiates the light guide groove 3. The light guide groove surface 31 reflects part of the light once to the light guide teeth 4. The light guide groove 3 reflects part of the light once to the reflective surface 14. The reflective surface 14 reflects the light twice to the light guide teeth 4. The light guide teeth 4 reflect the light to the second surface 12, thereby lighting up the entire second surface 12. The light emitted by the LED of the present invention is reflected once on the conical groove formed by the rotating parabola on the light guide plate body 1 (as Figure 5As shown), part of the light will directly reach the position of the light guide tooth 4, and the entire surface will be illuminated by the light guide tooth 4, and the other part of the light will reach the position of the reflective surface 14, and will be reflected twice by the reflective surface 14 (as shown). Figure 6 (As shown), secondary reflected light from the reflective surface also reaches the light guide teeth 4, illuminating the entire surface through the light guide teeth 4, thereby distributing the light emitted by the LED to the entire second surface, achieving surface light emission. In this utility model, the light emitted by the LED is divided into primary reflected light and secondary reflected light. The primary reflected light directly reaching the light guide teeth accounts for half of the LED's luminous flux, and the secondary reflected light reaching the light guide teeth also accounts for half of the LED's luminous flux, thus achieving efficient utilization of LED light.
[0047] like Figure 7 As shown, the difference between this second embodiment and the first embodiment is that the light guide teeth are in the shape of elongated strips, the elongated light guide teeth 5 are arranged in parallel, and the elongated light guide teeth 5 extend through the width of the light guide plate body 1. In this embodiment, by arranging the elongated light guide teeth 5 along the width of the light guide plate body 1, light reflected from the light guide grooves 3 directly strikes the elongated surfaces of the elongated light guide teeth 5. As a result, more light reflected from the light guide grooves 3 is received by the elongated surfaces of the elongated light guide teeth 5, achieving efficient utilization of LED light and improving the luminous effect of the entire light guide plate.
[0048] See also Figure 8 The difference between the third embodiment and the first embodiment is that the reflective surface is eliminated, and the light guide groove is a semi-conical groove 6 formed in a cross-section from the first surface 11 to the second surface 12. In this embodiment, although the light efficiency is reduced by about 50% after the reflective surface is eliminated, the entire light-emitting surface of the light guide plate can be evenly illuminated due to the dense distribution of light guide teeth 4 over a certain area on the first surface 11. Compared with the existing illumination effect of multiple LEDs, the lighting effect of the present invention is better and the cost is lower.
[0049] Please continue reading Figures 2 to 8 The present invention also provides a surface light source structure, comprising a light source 2 and the aforementioned light guide plate, wherein the light source 2 is a single point light source, preferably a single LED, but not limited to an LED, and the light source 2 faces the light guide groove 3 from one side of the second surface 12. The central axis of the light source 2 coincides with the central axis of the light guide groove 3.
[0050] Compared to existing light guide plate solutions, this new design effectively reduces the number of LEDs by adding a structural design to the light guide plate, while also reducing the PCBA footprint and significantly lowering product costs. Furthermore, this design utilizes LED light more efficiently, ensuring that light reaches the light-emitting area of the light guide teeth after both primary and secondary reflections.
[0051] In the description of this specification, the reference terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification.
[0052] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are illustrative and cannot be understood as limitations of the present invention. Ordinary technicians in this field can change, modify and modify the above embodiments within the scope of the present invention.
Claims
1. A light guide plate, characterized in that: It includes a light guide plate body (1), The light guide plate body (1) is a flat plate, and has a first surface (11), a second surface (12), and a side surface (13) connecting the first surface (11) and the second surface (12), wherein the first surface (11) and the second surface (12) are opposite to each other. A light guide groove (3) and a plurality of light guide teeth (4) are formed on the first surface (11). The light guide groove is formed inwardly from the first surface (11) to the second surface (12). The light guide groove (3) is close to a side surface of the light guide plate body. Light enters the light guide plate body through the second surface and irradiates the light guide groove. The light guide groove reflects part of the light to the light guide teeth, and the light guide teeth reflect the light to the second surface.
2. The light guide plate according to claim 1, wherein The light guide plate body (1) further comprises a reflective surface (14), the reflective surface (14) being formed on a side surface of the light guide plate body, and the light guide groove (3) being close to the reflective surface (14). The light enters the light guide plate body through the second surface and irradiates the light guide groove. The light guide groove reflects part of the light to the reflection surface, and the reflection surface reflects the light twice to the light guide teeth.
3. The light guide plate according to claim 2, wherein: The reflecting surface (14) protrudes outward from one side of the light guide plate body (1) in an arc shape.
4. The light guide plate according to claim 2, wherein: The light guide groove (3) is a tapered groove, the depth of the tapered groove is greater than the depth of the light guide tooth (4), and the opening size of the tapered groove is greater than the opening size of the light guide tooth (4).
5. The light guide plate according to claim 1, wherein The shape of the light guide teeth (4) is one or more combinations of circular, semicircular, elliptical, triangular prism, conical, quadrangular pyramid and rhombus; or The shape of the light guide teeth is a micro-pattern shape; or The light guide teeth are in the shape of long strips, the long strip light guide teeth (5) are arranged in parallel, and the long strip light guide teeth (5) penetrate the light guide plate body along the width direction of the light guide plate body. The light guide plate according to claim 1 , wherein: A plurality of light guide teeth (4) are distributed in an array.
7. The light guide plate according to claim 1, wherein The light guide groove (3) is a semi-conical groove (6) formed in a cross section from the first surface (11) to the second surface (12).
8. A surface light source structure, characterized in that: It comprises a light source (2) and the light guide plate according to any one of claims 1 to 7, wherein the light source is a single point light source, and the light source (2) faces the light guide groove (3) from one side of the second surface (12).
9. The surface light source structure according to claim 8, characterized in that: The central axis of the light source (2) coincides with the central axis of the light guide groove (3).
10. The surface light source structure according to claim 8, characterized in that: The light source is a single LED.