Optical assembly, lighting device and vehicle
By setting optical microstructures on the front and rear surfaces of the light guide unit and using the back plate to reflect and leak light, the problems of light uniformity and increased device size in the prior art are solved, thereby improving light uniformity and reducing costs.
Patent Information
- Application Number
- CN202422965165.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-03
- Publication Date
- 2026-01-20
- Estimated Expiration
- 2034-12-03
AI Technical Summary
In the prior art, in order to improve the light uniformity of the light-emitting device, a diffuser plate or film is usually added in front of the light guide unit, which leads to complex assembly, increased cost and larger device size.
Optical microstructures, including optical teeth, are set on the front and rear surfaces of the light guide unit. The orientation of the optical teeth is set to improve the uniformity of light, and the back plate is used to reflect the leaked light, which simplifies the assembly process and reduces costs.
This improved light uniformity, reduced the thickness and volume of the light-emitting device, lowered costs, and increased the utilization rate of wide-angle light.
Smart Images
Figure CN223814584U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of car light, specifically relates to an optical assembly, lighting device and vehicle. BACKGROUND
[0002] The lighting device is used for providing light for lighting and / or optical indication function, is widely used in each field, for example, in the vehicle, utilizes the lighting device such as car light to ensure safe driving.But on the vehicle, various types of car light are often needed to realize different functions, including automobile headlamp, fog lamp, tail light, turn signal, brake light, side marker light, parking light and the like.
[0003] For the uniformity of light emitted by the light emitting device, the current measure to improve uniformity is usually to increase diffusion plate or film in front of the light guide unit, but this will make assembly complex, and will increase the volume of the light emitting device, and will also lead to increased cost. SUMMARY
[0004] Therefore, the purpose of the utility model is to provide an optical assembly, lighting device and vehicle, which can at least partially solve the above-mentioned problems.
[0005] The utility model discloses an optical assembly, comprising: light source, it is configured to emit light rays;Light guide unit, the light guide unit is the plate light guide of surface light emission, it includes the front surface of emitting light rays, the back surface opposite with the front surface and the end surface connected with the front surface and the back surface, wherein, light source is arranged at one end face;And backboard, it is configured to provide support to the light guide unit, wherein, at least one of the front surface and the back surface of the light guide unit is provided with optical microstructure.
[0006] In one embodiment, the back surface of the light guide unit is formed with first optical microstructure.
[0007] In one embodiment, the first optical microstructure formed on the back surface of the light guide unit is optical tooth, and the direction of the optical tooth of the first optical microstructure is transverse to the propagation direction of the light rays in the light guide unit.
[0008] In one embodiment, the front surface of the light guide unit is formed with second optical microstructure.
[0009] In one embodiment, the second optical microstructure formed on the front surface of the light guide unit is optical tooth, and the direction of the optical tooth of the second optical microstructure is parallel to the propagation direction of the light rays in the light guide unit.
[0010] In one embodiment, the width of the optical tooth is less than 1 millimeter.
[0011] In one embodiment, the height of the optical teeth is less than 500 microns.
[0012] In one embodiment, the back plate is provided with a white plating or layer on the surface close to the light guide unit.
[0013] According to another aspect of the present application, there is also provided a lighting device comprising any one of the optical assemblies as described above.
[0014] According to yet another aspect of the present application, there is also provided a vehicle comprising the lighting device as described above.
[0015] According to the optical assembly of the present application, by providing optical microstructures on the front and back surfaces of the light guide element, the uniformity of the light emitted by the light guide element can be improved, the thickness and volume of the lighting device can be reduced, the assembly process can be simplified, and the cost can be reduced. By setting the arrangement direction of the optical teeth on the front and back surfaces of the light guide element, the utilization rate of the large-angle light can be improved, and the light efficiency can be improved. BRIEF DESCRIPTION OF DRAWINGS
[0016] The above-mentioned features, technical characteristics, advantages and implementation manners of the present application will be further described in a clear and understandable manner below by describing the preferred embodiments and in conjunction with the drawings, in which,
[0017] Figure 1 a cross-sectional view of an optical assembly according to an embodiment of the present application is shown;
[0018] Figure 2 a cross-sectional view of an optical assembly according to an embodiment of the present application is shown; Figure 1 a cross-sectional view of an optical assembly according to an embodiment of the present application is shown;
[0019] Figure 3 a cross-sectional view of an optical assembly according to an embodiment of the present application is shown; Figure 1 a cross-sectional view of an optical assembly according to an embodiment of the present application is shown;
[0020] Figure 4 a cross-sectional view of an optical assembly according to an embodiment of the present application is shown;
[0021] Figure 5 a cross-sectional view of an optical assembly according to an embodiment of the present application is shown. DETAILED DESCRIPTION
[0022] Embodiments of the present application are described herein below by way of example only. As the skilled person will appreciate, the embodiments described can be modified in various ways without departing from the inventive concept. The drawings and the description are therefore to be regarded as being illustrative in nature rather than restrictive. In the following, like reference signs generally denote functionally similar or identical elements.
[0023] The optical assembly 100 can be used for one or more of the functions of turn signal, brake light, side marker light, parking light, back-up light, daytime running light, position light, grille light, etc., and can be particularly suitable for tail light function, without particular limitation to the light function.
[0024] The lighting device can include at least one optical assembly 100 according to the present application, each optical assembly 100 being used to implement a specific light function, and they can be arranged staggered to achieve a specific styling, and it is of course understood that the lighting device can include any number of optical assemblies 100 and these optical assemblies 100 can be arranged arbitrarily according to the styling requirements.
[0025] As shown in Figure 1 , the optical assembly 100 includes a light source 101, a light guide unit 102, and a back plate 103. Among them, the light source 101 is mounted on the printed circuit board 200 to emit light towards the light guide unit 102, which is for example but not limited to an LED light source. As shown in Figures 1-3 , the light guide unit 102 is generally plate-shaped, with a front surface 1021, a back surface 1022, and an end surface 1023 connecting the front surface 1021 and the back surface 1022. The light from the light source 101 is incident from one of the end surfaces into the interior of the light guide unit 102, and propagates between the front surface 1021 and the back surface 1022 of the light guide unit 102 towards the opposite end of the end surface, during which the light exits from the front surface 1021 of the light guide unit 102 along the main light exit direction H, that is, the front surface 1021 serves as the light exit surface of the light guide unit 102, thereby achieving a surface light emitting effect.
[0026] According to the embodiments of the present application, by cooperating the light source 101 and the light guide unit 102 to achieve a surface light emitting effect, the cost can be greatly reduced compared to the OLED solution.
[0027] In addition, for the light guide unit 102, there can also be part of the light leaking out from the back surface 1022 of the light guide unit 102, thereby reducing the optical efficiency. Therefore, as shown in Figure 1 and 4 , the optical assembly 100 further includes a back plate 103, which is disposed close to the back surface 1022 of the light guide unit 102 and is configured to reflect the light leaking out from the back surface 1022 towards the front surface 1021. In the embodiments of the present application, by providing the back plate 103 on the back side of the light guide unit 102 to reflect the light leaking out from the light guide unit 102, it is beneficial to improve the optical efficiency and the uniformity of the light emitting effect. In an alternative example, the back plate 103 is disposed close to the back surface of the light guide unit 102 and is configured to support the light guide unit 102 without providing a reflection function (for example, but not limited to, in the case that the light of the light guide unit 102 does not leak out from the back surface).
[0028] In one example, for example but not limited to, the backplate 103 may be selected from reflective colors and / or materials, such as a white backplate or other suitable colors. In another example, the backplate 103 may have a white plating or layer on the surface near the light guide unit 102 to improve light efficiency.
[0029] In one example, such as Figure 2 As shown, light from light source 101 enters the light guide unit 102 and propagates through total internal reflection. To allow the light to exit from the front surface 1021 of the light guide unit 102, the light guide unit 102 may include scattering particles. The light from light source 101 can be scattered in different directions by the scattering particles, thereby breaking the total internal reflection condition and allowing the light to exit from the front surface of the light guide unit 102. This light guide unit with scattering particles has excellent light diffusion characteristics and can achieve a very uniform light illumination effect. As a non-limiting example, this type of light guide unit can, for example, be made of polymethyl methacrylate (PMMA), such as LED 8N LD12, LD24, LD48, LD96, or it can be made of polycarbonate (PC), such as EL2245. The color can be selected as needed, for example, but not limited to, colorless, light red, red, etc.
[0030] In an alternative example, optical decoupling elements may be provided on the rear surface 1022 of the light guide unit 102 to disrupt the total internal reflection condition of light. Examples of optical decoupling elements include, but are not limited to, protrusions, depressions, serrations, textures, stripes, squares, etc.
[0031] In one example, such as Figure 1 and 3 As shown, a first optical microstructure 1028 is disposed on the rear surface of the light guide unit 102. The first optical microstructure 1028 can also achieve the effect of optical decoupling, and at the same time improve the uniformity of the light output effect. Since the feature size of the first optical microstructure 1028 is smaller than the resolution of the naked eye, the visual impression of the emitted beam can be guaranteed to be more uniform no matter how far away the external observer's line of sight is, without the need to add an additional diffusion element in front of the light guide unit, thereby reducing the size of the light-emitting device.
[0032] The first optical microstructure 1028 can be similar to optical decoupling elements, including but not limited to, protrusions, depressions, serrations, textures, stripes, squares, etc.
[0033] In one example, the first optical microstructure 1028 formed on the rear surface 1022 of the light guide unit 102 is an optical tooth, the direction of which is transverse to the propagation direction of light in the light guide unit 102. The propagation direction of light in the light guide unit 102 refers to the direction in which light propagates from the incident light end towards the opposite end.
[0034] Specifically, such as Figure 5 As shown, the optical teeth are a V-shaped structure formed by a first surface and a second surface. The first surface is the light-receiving surface, where light from the light source 101 undergoes total internal reflection, thus changing its direction to be emitted along the main light-emitting direction. Orienting the optical teeth laterally to the direction of light propagation in the light guide unit 102 facilitates the first surface, as the light-receiving surface, receiving light from the light source and reflecting it towards the main light-emitting direction, i.e., the front surface 1021 of the light guide unit 102, thereby improving light efficiency. Of course, the optical teeth can also be arranged in other directions; no specific restrictions are imposed without application.
[0035] In one example, at least a portion of the rear surface 1022 of the light guide unit 102 is inclined toward the front surface 1021 of the light guide unit 102. Light rays incident from the end face of the light guide unit 102 reach the rear surface 1022 and are reflected toward the front surface 1021, thereby exiting through the front surface 1021. This can improve both optical efficiency and the uniformity of the lighting effect.
[0036] In one example, such as Figures 1-5 As shown, the light guide unit 102 has a gradually decreasing thickness in the light-incident direction (thickness is the dimension of the light guide unit 102 in the main light-out direction). Since the light from the light source 101 is gradually lost as it propagates along the light-incident direction E (for example, due to light absorption, light leakage, etc. of the light guide unit 102), the light guide unit 102 has a gradually decreasing thickness in the light-incident direction E. This reduces the light loss at smaller thicknesses, making the overall loss more uniform, thereby giving the light guide unit 102 a more uniform surface light emission effect.
[0037] In one example, such as Figure 4 As shown, a second optical microstructure 1029 is formed on the front surface 1021 of the light guide unit 102. The formation of the second optical microstructure 1029 on the front surface 1021 can diffuse the light emitted through the front surface 1021, further improving the uniformity of the light emission effect. Since the feature size of the second optical microstructure 1029 is smaller than the resolving power of the naked eye, the visual impression of the emitted beam can be ensured to be more uniform regardless of the distance of the external observer's line of sight, without the need to add an additional diffusion element in front of the light guide unit, thereby reducing the size of the light-emitting device.
[0038] The second optical microstructure 1029 formed on the front surface 1021 can also receive the large-angle light from the light source 101 and reflect it back into the light guide unit 102 and be utilized, thereby improving the light efficiency.
[0039] The first optical microstructure 1029 can be formed as, but not limited to, a protrusion, a recess, a sawtooth, a skin texture, a stripe, a square block, etc.
[0040] In one example, the second optical microstructure 1029 formed on the front surface 1021 of the light guide unit 102 is an optical tooth, and the direction of the optical tooth is parallel to the propagation direction of the light in the light guide unit 102, thereby diffusing the light in the transverse direction and improving the uniformity of the light emission effect.
[0041] In one example, the width of the optical tooth is less than 1 mm. The size less than 1 mm can ensure the uniformity of the light emission effect while not affecting the appearance of the light guide unit 102, and is also easy to manufacture. Preferably, the width of the optical tooth is less than 500 microns, and in another example, the width of the optical tooth can also be less than 300 microns.
[0042] The height of the optical tooth is less than 500 microns. Preferably, the height of the optical tooth is less than 300 microns, and in another example, the height of the optical tooth can also be less than 200 microns.
[0043] The optical microstructure is preferably formed integrally with the light guide unit 102 to simplify the process and assembly.
[0044] In one embodiment, as shown in Figure 1 and 4 The optical assembly 100 also includes a transparent front plate 105 disposed on the front side of the light guide unit 102 and configured to transmit the light from the front surface. The transparent front plate 105 can serve to protect the light guide unit 102, which can avoid damage, scratches, and wear of the optical microstructure on the light guide unit 102, etc. The color of the transparent front plate can be selected as needed, such as red, pink, colorless, etc., which is not specifically limited by the present application.
[0045] According to the optical assembly of the present application, by providing the optical microstructure on the front and rear surfaces of the light guide element, the uniformity of the light emitted by the light guide element can be improved, the thickness and volume of the light emitting device can be reduced, the assembly process can be simplified, and the cost can be reduced. By setting the arrangement direction of the optical tooth on the front and rear surfaces of the light guide element, the utilization rate of the large-angle light can be improved, and the light efficiency can be improved.
[0046] According to the embodiments of the present application, there is also provided a lighting device comprising any one of the optical assemblies described above.
[0047] According to the embodiment of the present application, a vehicle is further included, which comprises the lighting device as described above.
[0048] The present application is not limited to the above structure, and various modifications can be made. Although the present application has been described by means of the limited number of embodiments, those skilled in the art will be able to design many alternative embodiments without departing from the scope of the present application disclosed herein. Therefore, the scope of the present application should be defined only by the appended claims.
Claims
1. An optical component (100), characterized in that, include: A light source (101) is configured to emit light; A light guide unit (102) is a plate-shaped light guide that emits light from a surface. It includes a front surface (1021) for emitting light, a rear surface (1022) opposite to the front surface (1021), and an end face (1023) connecting the front surface (1021) and the rear surface (1022). The light source (101) is arranged at one of the end faces (1023). A backplate (103) is configured to provide support for the light guide unit (102); wherein An optical microstructure is provided on at least one of the front surface (1021) and the rear surface (1022) of the light guide unit (102).
2. The optical component (100) according to claim 1, characterized in that, A first optical microstructure (1028) is formed on the rear surface (1022) of the light guide unit (102).
3. The optical component (100) according to claim 2, characterized in that, The first optical microstructure (1028) formed on the rear surface (1022) of the light guide unit (102) is an optical tooth, and the direction of the optical tooth of the first optical microstructure (1028) is transverse to the direction of light propagation in the light guide unit (102).
4. The optical component (100) according to claim 3, characterized in that, A second optical microstructure (1029) is formed on the front surface (1021) of the light guide unit (102).
5. The optical component (100) according to claim 4, characterized in that, The second optical microstructure (1029) formed on the front surface (1021) of the light guide unit (102) is an optical tooth, and the direction of the optical tooth of the second optical microstructure (1029) is parallel to the propagation direction of light in the light guide unit (102).
6. The optical component (100) according to claim 3 or 5, characterized in that, The width of the optical teeth is less than 1 millimeter.
7. The optical component (100) according to claim 6, characterized in that, The height of the optical teeth is less than 500 micrometers.
8. The optical component (100) according to any one of claims 1-5, characterized in that, The backplate (103) has a white plating or coating on its surface near the light guide unit (102).
9. A lighting device, characterized in that, Includes the optical component (100) as described in any one of claims 1 to 8.
10. A vehicle, characterized in that, Includes the optical components as described in any one of claims 1 to 8 or the lighting device as described in claim 9.