Vehicle-mounted light guide plate and light guide system

Abstract

The utility model provides a vehicle-mounted light guide plate and a light guide system, the light guide plate comprises a flat plate, a light inlet and at least one light emitting port, the light inlet and the light emitting port are arranged on the flat plate, the light inlet is provided with a light inlet surface, microstructures are distributed on the surface of the flat plate, and a plurality of reflecting surfaces are distributed on the side edge of the flat plate. The light incident surface is configured to refract incident light and then enter the flat plate, the plurality of reflecting surfaces are configured to reflect the light entering the flat plate, a part of light beams reflected by the reflecting surfaces are emitted from the light emitting port, the other part of light beams reach the microstructure, and the microstructure is configured to refract the received part of light. According to the utility model, two LEDs are adopted to emit light, so that double-port and icon lightening is realized, the LED cost is saved, and the utilization rate of light is improved.

Description

Technical Field

[0001] This utility model relates to the field of light emission, specifically to a vehicle-mounted light guide plate and light guide system. Background Technology

[0002] Currently, there are two main types of illumination methods for in-vehicle USB products with icons. For example... Figure 1 As shown, in the first scheme, multiple LEDs 10 are distributed on one PCB board 40, and the USB port 50 is connected to another PCB board 60. The multiple LEDs 10 directly illuminate the front cover 20, and the light is emitted directly from the laser-engraved light-emitting area 30 of the front cover through the diffuser material of the front cover body. The light path is as follows. Figure 2 As shown. Figure 3 The second type of light emission uses a light guide ring 100 scheme. Two LEDs 200 are mounted on the same PCB. The light emitted by the LEDs 200 is transmitted through the light guide ring 100 to the laser-engraved light-emitting area of ​​the front cover 20, and then emitted from the laser-engraved light-emitting area 30 through the diffuser material of the front cover (e.g., ...). Figure 3 (As shown). For Scheme 1, the luminous efficacy of the LED directly shining onto the diffuse material is low, and the large number of LEDs increases the cost. Scheme 1 also requires an additional PCB to mount the LEDs, leading to an increased number of PCBs and higher costs. Furthermore, the addition of two PCBs in actual production reduces efficiency. Additionally, the forward-facing LED emission method in Scheme 1 causes significant light leakage between the USB port 50 and the front cover 20. For Scheme 2, due to the small size of the USB product and the thinner light guide ring 100, the small size of the side light guide teeth requires high processing precision, and the optical effect is highly susceptible to the size of the light guide teeth.

[0003] Therefore, it is necessary to provide a new technical solution. Utility Model Content

[0004] To address the technical problems existing in the prior art, this utility model discloses a vehicle-mounted light guide plate and light guide system, the specific technical solution of which is as follows:

[0005] On the one hand, this utility model provides a vehicle-mounted light guide plate, which includes a flat plate and a light inlet and at least one light outlet formed on the flat plate.

[0006] The light inlet has a light-inlet surface.

[0007] The surface of the plate has microstructures, and the sides of the plate have several reflective surfaces.

[0008] The incident light surface is configured to refract the incident light into the plate. Several reflective surfaces are configured to reflect the light entering the plate. A portion of the light beam reflected by the reflective surfaces exits from the light-emitting port, while another portion of the light beam reaches the microstructure. The microstructure is configured to refract the received portion of the light beam.

[0009] Furthermore, there are at least two light-emitting ports, which are located on opposite sides of the light-inlet port.

[0010] There are two light-incident surfaces, which are located on the inner wall of the light-incident port and are arranged opposite to each other.

[0011] Furthermore, the incident surface is a plane and / or a curved surface.

[0012] Furthermore, the microstructure corresponds to the icon to be displayed, and the light refracted by the microstructure directly illuminates the area to be displayed.

[0013] Furthermore, the microstructure includes one or more of prism-tooth microstructures, spherical microstructures, and pyramidal microstructures.

[0014] Furthermore, the light guide plate is a transparent PC light guide plate or a transparent PMMA light guide plate.

[0015] On the other hand, this utility model also provides a light guiding system, which includes a light source, a light guiding structure, and the light guiding plate described in one aspect above.

[0016] The light guide plate is fixed in the light guide structure.

[0017] The light source is housed in the light inlet, and the incident light emitted by the light source enters the light guide plate after being refracted by the light inlet surface.

[0018] The light guide structure is configured to receive the emitted light beam from the light guide plate, and the light guide structure is illuminated by the emitted light beam.

[0019] Furthermore, the light guide structure includes a front cover with an icon to be displayed on its outer surface. The light guide plate is fixed to the front cover, and the inner surface of the front cover faces the side of the flat plate that is away from the microstructure. The light beam refracted by the microstructure can directly illuminate the icon to be displayed.

[0020] Furthermore, the front cover is a diffusion material front cover.

[0021] Furthermore, the light source is two LED light sources, which are coaxial and back-to-back, with one light source facing one of the light-incident surfaces and the other light source facing the other light-incident surface.

[0022] This utility model has the following beneficial effects:

[0023] (1) This utility model uses two LEDs to emit light, realizes the lighting of dual ports and icons, saves LED costs and improves the utilization rate of light.

[0024] (2) The LED of this utility model adopts upward light emission, which solves the light leakage problem and saves PCB and process costs compared with forward light emission.

[0025] (3) The present invention adopts a more stable light guide plate structure, which is more stable than the slender ring structure.

[0026] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of a light-emitting structure in a USB product in the prior art;

[0029] Figure 2 for Figure 1 Schematic diagram of the combined structure;

[0030] Figure 3 This is a schematic diagram of another light-emitting structure for a USB product in the prior art;

[0031] Figure 4 This is a schematic diagram of the structure of the light guide plate of this utility model in one embodiment;

[0032] Figure 5 This is a schematic diagram of the light guide plate of this utility model in one embodiment;

[0033] Figure 6 This is a schematic diagram of the structure of the light guide plate of this utility model in another embodiment;

[0034] Figure 7 This is a schematic diagram of the structure of the light guide plate of this utility model in another embodiment;

[0035] Figure 8 This is an exploded structural diagram of the light guiding system of this utility model;

[0036] Figure 9 for Figure 8 A schematic diagram showing the data port engaging with the light guide plate;

[0037] Figure 10(a) is a structural schematic diagram of one combination of the USB interface and icon shown on the front cover of this utility model;

[0038] Figure 10(b) is a schematic diagram of another combination of the USB interface and icon shown on the front cover of this utility model;

[0039] Figure 10(c) is a schematic diagram of another combination of the USB interface and icon shown on the front cover of this utility model.

[0040] Among them, 1-light guide plate, 2-light source, 3-light guide structure, 4-PCB, 5-data port, 11-flat plate, 12-light inlet, 121-first light inlet surface, 122-second light inlet surface, 13-light emission port, 14-microstructure, 141-edge area of ​​light emission port, 142-area between flat plate side plate and light emission port, 111-first reflective surface, 112-second reflective surface, 113-third reflective surface, 114-fourth reflective surface, 115-fifth reflective surface, 116-sixth reflective surface, 117-seventh reflective surface, 118-eighth reflective surface, 31-front cover, 311-icon to be displayed, 312-opening. Detailed Implementation

[0041] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0042] In the description of this utility model, it should be understood that the terms "upper," "lower," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0043] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0044] Please see Figures 4 to 9 , Figure 4 This is a schematic diagram of the structure of the light guide plate of this utility model in one embodiment; Figure 5 This is a schematic diagram of the light guide plate of this utility model in one embodiment;

[0045] Figure 6 This is a schematic diagram of the structure of the light guide plate of this utility model in another embodiment; Figure 7 This is a schematic diagram of the structure of the light guide plate of this utility model in another embodiment; Figure 8 This is an exploded structural diagram of the light guiding system of this utility model; Figure 9 for Figure 8 A schematic diagram showing the data port engaging with the light guide plate.

[0046] like Figure 4 and Figure 5 As shown, the light guide plate 1 of this utility model includes a flat plate 11 and a light inlet 12 and a light outlet 13 formed on the flat plate 11. The light guide plate is a transparent polycarbonate (PC) light guide plate or a transparent polymethyl methacrylate (PMMA) light guide plate.

[0047] The inner wall of the light inlet 12 has two opposing light-incident surfaces. In this embodiment, the light-incident surfaces are planar, as shown in... Figure 6 In other embodiments shown, the light-incident surface formed by the inner wall of the light-incident port is not limited to a plane, and can be adjusted to a parabolic surface, a free light-incident surface, etc., depending on the layout of the USB dual ports and LEDs. For ease of description, this utility model refers to the two light-incident surfaces as including a first light-incident surface 121 and a second light-incident surface 122. The light-incident port 12 accommodates a light source 2, preferably two light sources, with one light source facing the first light-incident surface and the other light source facing the second light-incident surface.

[0048] exist Figure 4 and Figure 5 In the illustrated embodiment, there are two light-emitting ports 13, located on either side of the light-inlet port 12. In other embodiments, there is at least one light-emitting port, the specific number depending on the number of USB data ports.

[0049] Please continue reading. Figure 4 and Figure 5 The side of the plate 11 has several reflective surfaces, which surround the side of the plate 11. In this invention, the reflective surfaces are preferentially distributed at the corners of the side of the light guide plate, which can maximize the distribution of the light beam across the entire plate 11, thereby ensuring that the reflective surfaces can reflect more light, and further ensuring that more collimated light is reflected to the light emission port 13.

[0050] In this embodiment, for ease of description, the reflective surfaces are sequentially labeled as first reflective surface 111, second reflective surface 112, third reflective surface 113, fourth reflective surface 114, fifth reflective surface 115, sixth reflective surface 116, seventh reflective surface 117, and eighth reflective surface 118. The first reflective surface 111, second reflective surface 112, third reflective surface 113, and fourth reflective surface 114 are located on one side of the plate and primarily reflect the light beam refracted into the plate by the first light-incident surface 121. The fifth reflective surface 115, sixth reflective surface 116, seventh reflective surface 117, and eighth reflective surface 118 are located on the other side of the plate and primarily reflect the light beam refracted into the plate by the second light-incident surface 122. In this embodiment, all reflective surfaces are inclined reflective surfaces. By changing the light propagation path through the inclined reflective surfaces, the angle and size of the inclined reflective surfaces can be adjusted according to the product design to control the light emission direction. In other embodiments, the reflective surfaces may also be one or more combinations of toothed reflective surfaces and inclined reflective surfaces. In other embodiments, the number and shape of the reflective surfaces may also be determined according to the light emission requirements of the actual product.

[0051] Please continue reading. Figure 4 and Figure 5 The surface of the plate 11 is provided with microstructures 14. In this embodiment, the microstructures 14 are distributed on one surface of the plate 11, and the distribution area of ​​the microstructures 14 corresponds to the icon to be displayed on the front cover 31 of the light guide structure 2 (see...). Figure 8The light beam refracted by the microstructure 14 can be directly projected onto the icon to be displayed through the other surface of the plate 11, thereby illuminating the icon. The position, number, size, and depth of the microstructure 14 distributed on the surface of the plate can be adjusted according to actual conditions to achieve uniform light emission. In this embodiment, the microstructure 14 is distributed on the back of the plate, mainly in the area 141 between the side of the plate and the light-emitting port, and the edge area 142 of the light-emitting port. The microstructure in the area 141 between the side of the plate and the light-emitting port corresponds to the icon of the data port on the front cover 31. The light beam refracted by the microstructure in this area can directly illuminate the icon of the data port on the front cover of the light guide structure, thereby illuminating the icon of the data port. The light beam refracted by the microstructure in the edge area 142 of the light-emitting port can directly illuminate the edge of the opening on the front cover 31 where the data port is installed, thereby illuminating the edge of the opening. In other embodiments, the distribution position of the microstructure is not limited and can be adjusted according to actual needs.

[0052] In this embodiment, the microstructure 14 is prismatic in shape. In other embodiments, such as... Figure 7 The microstructure has a combination of spherical and prismatic tooth-like shapes. The prismatic tooth-like microstructures are distributed in the edge region 141 of the light-emitting port, while the spherical microstructures are distributed in the region 142 between the flat side plate and the light-emitting port. The light distribution is adjusted by changing the width, depth, and angle of the microstructures, achieving the effects of light emission and optimized uniformity. In other embodiments, the microstructure includes one or more combinations of prismatic tooth-like, spherical, pyramidal, and other patterns. The light distribution is adjusted by changing the density and size distribution of these patterns, achieving the effect of optimized uniformity.

[0053] like Figure 5 and Figure 8As shown in the figure, the dashed lines represent part of the light path. The light emitted by the light source 2 towards the first light-incident surface 121 is split as much as possible after passing through the first light-incident surface 121, illuminating the first reflective surface 111 and the third reflective surface 113 adjacent to the first reflective surface 111. The light undergoes total internal reflection through these two surfaces and continues to propagate to a distance. The light passing through the microstructure 14 in the optical path changes its transmission direction and is directly emitted onto the display area 311, i.e., the laser-engraved icon area, on the front cover 21 of the diffuse light guide structure 3, or emitted onto the light guide ring (not shown). The icon on the front cover of the diffuse light guide is illuminated by the light transmitted through it, lighting up the icon or the light-emitting ring. The part of the light unaffected by the microstructure 14 is transmitted to the second reflective surface 112 and the fourth reflective surface 114. After two total internal reflections by the second reflective surface 112 and the fourth reflective surface 114, it is refracted through the microstructure 14 in the optical path to the light-emitting port 13, thereby illuminating the far end of the data interface installed in the light-emitting port 13. The light emitted from the light source 2 facing the second light-incident surface 122 propagates along the same path to the fifth, sixth, seventh, and eighth reflective surfaces 115, 116, 117, and 118 on the other side of the flat plate. The light output of the laser-engraved Type opening and icon on the front of the front cover is achieved by adjusting the luminous flux ratio of the upper and lower light sources. Uniform light output is achieved by adjusting the angle of the reflective surfaces and the size or depth of the microstructure on the back.

[0054] Please see Figure 8 and Figure 9 ,like Figure 8 and Figure 9 As shown, this utility model also provides a light guiding system, which includes a light source 2, a light guiding structure 3 and a light guiding plate 1 as described above.

[0055] The light guide plate 1 is fixed in the light guide structure 3.

[0056] The light source 2 is housed in the light inlet 12. Incident light emitted from the light source 2 is refracted through the light-inlet surface and enters the light guide plate 1. There are two light sources 2, coaxially arranged and facing away from each other. The light sources 2 are LED light sources, with one light source facing the first light-inlet surface 121 and the other facing the second light-inlet surface 122. By using two light sources, this invention maximizes the amount of light emitted from each light source projected onto the corresponding light-inlet surface, allowing more light to enter the flat plate and improving the luminous effect.

[0057] Several reflective surfaces are configured to partially reflect the light beam entering the plate 11 to the light-emitting port 13 and the microstructure 14. The microstructure 14 is configured to refract the received light to the light-emitting port 13 and the light guide structure 3. The light guide structure 3 is configured to receive the emitted light beam and is illuminated by the emitted light beam.

[0058] Further, the light guide structure 3 includes a front cover 31, the light guide plate 1 is fixed to the front cover 31, the front cover 31 is a milky white diffusion material front cover, the front cover 31 has an opening 312 corresponding to the data port, the outer surface of the front cover is sprayed with a black coating layer, and the icon to be displayed 311 is engraved by laser engraving the coating layer. In this embodiment, the icon to be displayed 311 is located at the periphery of the opening and the upper side of the opening, respectively. The light beam refracted by the microstructure illuminates the icon to be displayed 311, thereby illuminating the icon to be displayed 311. In other embodiments, the shape and position of the icon to be displayed are not limited. In this embodiment, the inner surface of the front cover 31 faces the front of the flat plate 11, that is, the side facing away from the microstructure 14, and the light-emitting port 13 corresponds one-to-one with the opening 312. The distal end of the data port 5 extends through the light-emitting port 13 to the opening 312. The data port 5 and the light source 2 are both connected to the PCB 4. Figure 8 and Figure 9 The diagram shows two data ports, a Type-A port and a Type-B port. In other embodiments, the number of data ports is not limited and can be different USB interfaces.

[0059] This invention is applicable to products with different USB data interfaces and illuminated icons; only the layout and size of the microstructure on the back need to be changed. For example... Figures 10(a) to 10(c) A structural diagram showing different combinations of USB data interfaces and icons.

[0060] This invention uses two LEDs for light emission, enabling dual-port and icon illumination, saving LED costs and improving light utilization. Furthermore, the LEDs employ upward-firing light emission, which, compared to forward-firing, solves the light leakage problem and saves on PCB and manufacturing costs. This invention also utilizes a more stable light guide plate structure, which is more stable than a slender ring structure.

[0061] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0062] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications and variations to the above embodiments within the scope of the present invention.

Claims

1. A vehicle-mounted light guide plate, characterized in that, It includes a flat plate (11) and a light inlet (12) and at least one light outlet (13) formed on the flat plate. The light inlet (12) has a light-inlet surface. The surface of the plate (11) is covered with microstructures (14), and the sides of the plate (11) are covered with a plurality of reflective surfaces. The incident light surface is configured to refract the incident light into the plate (11), and several reflective surfaces are configured to reflect the light entering the plate (11). A portion of the light beam reflected by the reflective surfaces exits from the light-emitting port (13), and another portion of the light beam reaches the microstructure (14). The microstructure is configured to refract the received portion of the light.

2. The vehicle-mounted light guide plate according to claim 1, characterized in that, There are at least two light-emitting ports (13), and the two light-emitting ports are located on both sides of the light-inlet port (12). There are two light-incident surfaces, which are located on the inner wall of the light-incident port (12) and are arranged opposite to each other.

3. The vehicle-mounted light guide plate according to claim 2, characterized in that, The incident light surface is a plane and / or a curved surface.

4. The vehicle-mounted light guide plate according to claim 1, characterized in that, The microstructure (14) corresponds to the icon to be displayed, and the light refracted by the microstructure directly illuminates the area to be displayed.

5. The vehicle-mounted light guide plate according to claim 4, characterized in that, The microstructure (14) includes one or more of the following: prismatic tooth microstructure, spherical microstructure and pyramidal microstructure.

6. The vehicle-mounted light guide plate according to claim 1, characterized in that, The light guide plate (1) is a transparent PC light guide plate or a transparent PMMA light guide plate.

7. A light guiding system, characterized in that, It includes a light source (2), a light guide structure (3), and a vehicle-mounted light guide plate (1) as described in any one of claims 1 to 6. The light guide plate (1) is fixed in the light guide structure (3). The light source (2) is housed in the light inlet (12), and the incident light emitted by the light source enters the light guide plate after being refracted by the light inlet surface. The light guide structure (3) is configured to receive the emitted light beam from the light guide plate, and the light guide structure (3) is illuminated by the emitted light beam.

8. The light guiding system according to claim 7, characterized in that, The light guide structure (3) includes a front cover (31), the outer surface of which has an icon (311) to be displayed, and the light guide plate (1) is fixed on the front cover (31). The inner surface of the front cover faces the side of the plate that is away from the microstructure, and the light beam refracted by the microstructure can directly illuminate the icon to be displayed.

9. The light guiding system according to claim 8, characterized in that, The front cover (31) is a diffusion material front cover.

10. The light guiding system according to claim 7, characterized in that, The light source (2) consists of two LED light sources, which are coaxial and back-to-back. One light source faces one of the light-incident surfaces, and the other light source faces the other light-incident surface.

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