Light emitting device
By employing a design with two short light guides and one control unit in the vehicle's light-emitting device, the difficulties of installation and injection molding in scenarios with long light guides are solved, achieving uniform light output and high-efficiency optical performance, suitable for multiple locations inside and outside the vehicle.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANGHAI YANFENG JINQIAO AUTOMOTIVE TRIM SYSTEMS CO LTD
- Filing Date
- 2025-08-06
- Publication Date
- 2026-06-26
AI Technical Summary
Existing vehicle lighting devices suffer from problems such as the inability to install LED light sources at both ends of the light guide in long light guide scenarios, difficulty in injection molding, and poor optical performance, especially in space-constrained and long-distance transmission scenarios where the effect is not ideal.
Two shorter light guides and a control unit are installed at both ends of the light guides respectively. They are connected by a cross-connection bridge with an adjustable distance to achieve the effect of a long light guide, thus avoiding the difficulties of installing and injection molding a long light guide.
It achieves uniform light output in space-constrained scenarios, improves optical performance and luminescence effect, reduces costs and increases yield.
Smart Images
Figure CN224414949U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of vehicle parts technology, and more specifically to a light-emitting device. Background Technology
[0002] With the increasing demand for intelligent and personalized vehicles, vehicle lighting devices have evolved from traditional functional lighting (such as headlights and taillights) to decorative and interactive features.
[0003] In existing technologies, vehicle lighting devices typically employ a single light guide coupled with LED light sources at both ends. This structure is sufficient for short-distance light guide scenarios (such as interior reading lights and small decorative lights), but in long light guide scenarios (such as body waistline ambient lights, continuous taillights, or long strip instrument backlights), the following problems exist: 1) Vehicle structural limitations prevent the simultaneous installation of LED light sources at both ends of the light guide (e.g., narrow door sheet metal space, complex rear styling, etc.), making it difficult for a single-end light source to achieve uniform light output; 2) Long light guides (length exceeding 500mm) are difficult to inject into the mold. During the injection molding process, uneven melt flow and differences in cooling rates can easily lead to surface shrinkage, warping, or internal stress concentration, affecting optical performance (such as light transmittance and total internal reflection efficiency), and resulting in a low yield (usually below 60%). Utility Model Content
[0004] The purpose of this invention is to provide a light-emitting device to solve the aforementioned problems of existing light-emitting devices.
[0005] To achieve the above objectives, this utility model provides a light-emitting device, which includes a first light guide, a second light guide, a first light source assembly, and a second light source assembly. The first light source assembly is disposed at one end of the first light guide, and the second light source assembly is disposed at one end of the second light guide. The first light source assembly includes a control unit and a first light source, and the second light source assembly includes a second light source. The control unit is connected to the first light source and the second light source respectively to control the light emission of the first light source and the second light source. The first light guide is used to conduct the light emitted by the first light source, and the second light guide is used to conduct the light emitted by the second light source.
[0006] Optionally, the first light guide and the second light guide are arranged in an alternating manner.
[0007] Optionally, the end of the first light guide with the first light source component is adjacent to the end of the second light guide with the second light source component, and the end of the first light guide away from the first light source component and the end of the second light guide away from the second light source component extend in opposite directions.
[0008] Optionally, the first light source assembly further includes a first circuit board, and the second light source assembly further includes a second circuit board. The control unit and the first light source are both disposed on the first circuit board, and the second light source is disposed on the second circuit board; the first circuit board and the second circuit board are electrically connected.
[0009] Optionally, the first light source is located on the side of the first circuit board closer to the first light guide, the control unit is located on the side of the first circuit board away from the first light guide, and the second light source is located on the side of the second circuit board closer to the second light guide.
[0010] Optionally, the first light source assembly further includes a first housing, the second light source assembly further includes a second housing, the first circuit board is disposed in the first housing, the second circuit board is disposed in the second housing, one end of the first light guide with the first light source assembly extends into the first housing, and one end of the second light guide with the second light source assembly extends into the second housing.
[0011] Optionally, the first circuit board and the second circuit board are connected by a conductive medium.
[0012] Optionally, one end of the conductive medium is connected to the first circuit board via a connector or soldering on the first board, and the other end of the conductive medium is connected to the second circuit board via a connector or soldering on the second board.
[0013] Optionally, the conductive medium is a ribbon cable, a flexible circuit board, or a wire harness.
[0014] Optionally, the light-emitting device includes a connecting bridge, which is fixedly connected to the first light source assembly and the second light source assembly respectively.
[0015] Optionally, the connecting bridge is detachably connected to the first light source assembly and the second light source assembly, and the fixed position of the first light source assembly on the connecting bridge and / or the fixed position of the second light source assembly on the connecting bridge is set to be adjustable, so that the distance between the first light source assembly and the second light source assembly is adjustable.
[0016] The light-emitting device of this invention replaces a long light guide with two shorter first and second light guides, thereby avoiding the problems of existing long light guides being unable to be installed and difficult to inject mold in space-constrained scenarios. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the structure of the light-emitting device according to an embodiment of the present utility model;
[0018] Figure 2 for Figure 1Exploded view of the light-emitting device;
[0019] Figure 3 This is a schematic diagram of the structure of the first circuit board and the first surface of the second circuit board of the light-emitting device according to an embodiment of the present invention;
[0020] Figure 4 This is a schematic diagram of the structure of the second side of the first circuit board and the second circuit board of the light-emitting device according to an embodiment of the present invention;
[0021] Figure 5 This is a schematic diagram of the structure of a light-emitting device with decorative strips according to an embodiment of the present invention;
[0022] Figure 6 This is a schematic diagram of a light-emitting device with a connecting bridge according to an embodiment of the present invention;
[0023] Figure 7 for Figure 6 A schematic diagram of its decomposed structure. Detailed Implementation
[0024] The preferred embodiments of this utility model are given below with reference to the accompanying drawings and described in detail.
[0025] It should be noted that in this utility model, "set on / properly placed on" can refer to one component directly on another component, or one component indirectly on another component; "set on / properly placed on" can refer to a fixed connection between two components, or it can refer to the relative movement between two components.
[0026] Unless otherwise explicitly stated and limited, the terms “connected” and “linked” should be interpreted broadly, including but not limited to physical contact connections (such as welding, riveting, and snap-fit connections), non-contact connections (such as wireless communication, electromagnetic induction, and optical coupling), electrical connections (such as wires and circuit board traces), and indirect connections achieved through an intermediate medium.
[0027] In this invention, the terms "first," "second," etc., are used only to distinguish different components, steps, or features, and do not indicate any order, priority, importance, or quantity limitation.
[0028] like Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, this utility model embodiment provides a light-emitting device, including a first light guide 100, a second light guide 200, a first light source assembly 300, and a second light source assembly 400. The first light source assembly 300 is disposed at one end of the first light guide 100, and the second light source assembly 400 is disposed at one end of the second light guide 200. The first light source assembly 300 includes a control unit 310 and a first light source 320, and the second light source assembly 400 includes a second light source 410. Both the first light source 320 and the second light source 410 are used to emit light. The control unit 310 is connected to the first light source 320 and the second light source 410 respectively, and is used to control the emission of light from the first light source 320 and the second light source 410. The first light guide 100 is used to conduct the light emitted by the first light source 320, and the second light guide 200 is used to conduct the light emitted by the second light source 410.
[0029] Since the light-emitting device includes two light guides, when applied to scenarios requiring long light guides, two short light guides can achieve the effect of one long light guide (equivalent to dividing the long light guide into two short light guides), thus overcoming the technical drawback of difficult injection molding of long light guides in existing technologies. Furthermore, the light-emitting device includes only one control unit 310, which controls both light sources, saving costs.
[0030] The control unit 310 can be any suitable control device, including but not limited to microcontroller units (MCUs), system-on-a-chip, processors, etc.
[0031] In some embodiments, the first light guide 100 and the second light guide 200 can be arranged in a cross configuration, which can save installation space and enable the light-emitting device to be used in space-constrained scenarios.
[0032] Furthermore, the end of the first light guide 100 with the first light source component 300 is adjacent to the end of the second light guide 200 with the second light source component 400 (i.e., the two light source components are adjacent), while the end of the first light guide 100 away from the first light source component 300 and the end of the second light guide 200 away from the second light source component 400 extend in opposite directions; that is, the first light source component 300 and the second light source component 400 are located between the end of the first light guide 100 away from the first light source component 300 and the end of the second light guide 200 away from the second light source component 400; in this way, the first light guide 100 and the second light guide 200 are equivalent to forming a longer light guide (approximately equal to the sum of the lengths of the first light guide 100 and the second light guide 200), and the first light source component 300 and the second light source component 400 are located in the middle of the long light guide, rather than at both ends of the long light guide. Therefore, even in space-constrained scenarios where light source components cannot be installed at both ends of the long light guide, the application can still be realized. Furthermore, because the light intensity of the light source is significantly attenuated during the transmission process due to the excessively long transmission distance of the long light guide, it will affect the light emission effect. However, the light emission device of this utility model embodiment uses two short light guides instead of one long light guide, which results in a shorter transmission distance and thus achieves a better light emission effect.
[0033] like Figure 2 , Figure 3 and Figure 4 As shown, in some embodiments, the first light source assembly 300 may further include a first circuit board 330, and the second light source assembly 400 may further include a second circuit board 420. The control unit 310 and the first light source 320 (which can be connected via circuit board traces) are both disposed on the first circuit board 330, and the second light source 410 is disposed on the second circuit board 420. The first circuit board 330 and the second circuit board 420 are electrically connected, thereby enabling an electrical connection between the control unit 310 and the second light source 410. The first circuit board 330 and the second circuit board 420 are provided with the necessary circuitry for control and light emission, allowing the control unit 310 to control the light emission of the first light source 320 and the second light source 410. The necessary circuitry for control and light emission on the circuit boards is well known in the art and will not be described in detail here.
[0034] like Figure 3 and Figure 4 As shown, the first light source 320 can be located on the first side of the first circuit board 330, the second light source 410 can be located on the first side of the second circuit board 420, and the control unit 310 is located on the second side of the first circuit board 330. The first side is the side closer to the first light guide 100 or the second light guide 200, and the second side is the side farther away from the first light guide 100 or the second light guide 200. This arrangement allows the light emitted by the light source to smoothly enter the light guide, thereby achieving the desired light emission effect.
[0035] like Figure 2As shown, in some embodiments, the first light source assembly 300 may further include a first housing 340, and the second light source assembly 400 may further include a second housing 430. The first circuit board 330 is disposed within the first housing 340, and the second circuit board 420 is disposed within the second housing 430. One end of the first light guide 100 extends into the first housing 340 (this end is the end where the first light source assembly 300 is disposed, used to receive light emitted by the first light source 320), and one end of the second light guide 200 extends into the second housing 430 (this end is the end where the second light source assembly 400 is disposed, used to receive light emitted by the second light source 410). This allows the control unit 310 and the first light source 320 to be located within the first housing 340, while the second light source 410 is located within the second housing 430. This provides protection and aesthetics, and also prevents light leakage from the light source, allowing as much light as possible to enter the light guide, thereby achieving a better light emission effect.
[0036] The first housing 340 may include a first upper housing 341 and a first lower housing 342, which are detachably connected. The first lower housing 342 is connected to the first light guide 100. The second housing 430 may include a second upper housing 431 and a second lower housing 432, which are detachably connected. The second lower housing 432 is connected to the second light guide 200. In this way, the circuit board can be conveniently installed in its respective housing.
[0037] In some embodiments, the first circuit board 330 and the second circuit board 420 may be connected by a conductive medium 500 to achieve an electrical connection between the first circuit board 330 and the second circuit board 420. The conductive medium 500 may be a ribbon cable, a flexible circuit board, a wire harness, or any other suitable conductive element.
[0038] The two ends of the conductive medium 500 can be connected to the first circuit board 330 and the second circuit board 420 respectively through board connectors or soldering. That is, one end of the conductive medium 500 is connected to the first circuit board 330 through board connectors or soldering, and the other end of the conductive medium 500 is connected to the second circuit board 420 through board connectors or soldering.
[0039] like Figure 5 As shown, in some embodiments, a first decorative strip 110 may be provided on the outer side of the first light guide 100, and a second decorative strip 210 may be provided on the outer side of the second light guide 200, for decorative purposes.
[0040] like Figure 6 and Figure 7As shown, in some embodiments, the light-emitting device may further include a connecting bridge 600, which is fixedly connected to the first light source assembly 300 and the second light source assembly 400, respectively, for example, fixedly connected to the first housing 340 and the second housing 430, thereby preventing relative movement between the first light source assembly 300 and the second light source assembly 400. This can make the light-emitting device more stable on the one hand, and also avoid damage to the conductive medium 500 due to the relative movement between the two.
[0041] In some embodiments, the connecting bridge 600 is detachably fixed to the first light source assembly 300 and the second light source assembly 400, and the fixed position of the first light source assembly 300 on the connecting bridge 600 and / or the fixed position of the second light source assembly 400 on the connecting bridge 600 is set to be adjustable. This allows the distance between the first light source assembly 300 and the second light source assembly 400 to be adjustable. In this way, before fixing the two light source assemblies through the connecting bridge 600, the distance between the two light source assemblies can be adjusted so that the conductive medium 500 is in a suitable state (e.g., it is neither subjected to tension nor pressure due to bending). Then, both are fixed to the connecting bridge 600. After fixing, the distance between the two light source assemblies will not change, thereby protecting the conductive medium 500 and making it less prone to damage.
[0042] For example, the connecting bridge 600 may be provided with a plurality of first slots 610 arranged in sequence, and the first light source assembly 300 (e.g., the first housing 340) may be provided with a first buckle 350 that matches the first slot 610. The first buckle 350 can be inserted into the first slot 610 to achieve fixation. By inserting the first buckle 350 into the first slot 610 at different positions, the first light source assembly 300 can be fixed at different positions of the connecting bridge 600. Similarly, the second light source assembly 400 can also be fixed at different positions of the connecting bridge 600 through a similar structure. Of course, the second light source assembly 400 can also be fixed at a specific position of the connecting bridge 600 (this position cannot be changed) through a specific buckle and slot design, while only the fixed position of the first light source assembly 300 is adjustable, so that the distance between the two light source assemblies can also be adjusted.
[0043] It is understandable that, in addition to the snap-fit and slot method, the first light source assembly 300 and / or the second light source assembly 400 can also be fixed to different positions of the connecting bridge 600 by any other suitable method. For example, the connecting bridge 600 may have multiple screw holes, and the first light source assembly 300 and / or the second light source assembly 400 may have screws. By screwing the screws into the screw holes at different positions, the first light source assembly 300 and / or the second light source assembly 400 can be fixed to different positions of the connecting bridge 600. Alternatively, magnetic elements may be provided at different positions of the connecting bridge 600, and the first light source assembly 300 and / or the second light source assembly 400 may also have magnetic elements. By the attraction between the magnetic elements on the first light source assembly 300 and / or the second light source assembly 400 and the magnetic elements at different positions of the connecting bridge 600, the first light source assembly 300 and / or the second light source assembly 400 can be fixed to different positions of the connecting bridge 600. Or, adhesive elements may be used to fix the first light source assembly 300 and / or the second light source assembly 400 to different positions of the connecting bridge 600. And so on.
[0044] The first light source 100 and the second light source 200 can be any device capable of generating visible light or light of a specific wavelength, including but not limited to LED lamps, halogen lamps, xenon lamps, OLEDs (organic light-emitting diodes), incandescent lamps, electroluminescent sheets, laser light sources, etc. The specific type of light source can be selected or combined according to the actual application scenario, energy efficiency requirements, cost budget, or optical performance requirements.
[0045] The light-emitting device of this utility model embodiment can be applied to any suitable location in a vehicle, such as the roof, door panels, seats, dashboard, etc. inside the vehicle, or the bumper, waistline, etc. on the exterior of the vehicle. The specific application can be selected according to actual needs.
[0046] The light-emitting device of this utility model replaces a long light guide with two shorter first light guides 100 and second light guides 200, thereby avoiding the problems of existing long light guides being unable to be installed and difficult to inject mold in space-constrained scenarios.
[0047] It should be noted that the present invention (e.g., a utility model concept, etc.) has been described in the specification and / or illustrated in the figures of this patent document according to exemplary embodiments; the embodiments of the present invention are presented by way of example only and are not intended to limit the scope of the present invention. The structure and / or arrangement of the elements of the utility model concept embodied in the present invention as described in the specification and / or illustrated in the figures are merely illustrative. Although exemplary embodiments of the present invention have been described in detail in this patent document, it will be readily understood by those skilled in the art that equivalents, modifications, variations, etc., of the subject matter of the exemplary and alternative embodiments are possible and are considered to be within the scope of the present invention; all such subject matter (e.g., modifications, variations, embodiments, combinations, equivalents, etc.) are intended to be included within the scope of the present invention. It should also be noted that various modifications, variations, substitutions, equivalents, alterations, omissions, etc., may be made in the configuration and / or arrangement of the exemplary embodiments (e.g., in terms of concept, design, structure, device, form, assembly, construction, means, function, system, process / method, steps, sequence of process / method steps, operation, operating conditions, performance, materials, composition, combination, etc.) without departing from the scope of this utility model; all such subject matter (e.g., modifications, variations, embodiments, combinations, equivalents, etc.) is intended to be included within the scope of this utility model. The scope of this utility model is not intended to be limited to the subject matter (e.g., details, structure, function, materials, behavior, steps, sequence, system, result, etc.) described in the specification and / or figures of this patent document. Considering that the claims of this patent document will be properly interpreted to cover the full scope of the subject matter of this utility model (e.g., including any and all such modifications, variations, embodiments, combinations, equivalents, etc.), it should be understood that the terminology used in this patent document is for the purpose of providing a description of the subject matter of exemplary embodiments and not as a limitation on the scope of this utility model.
[0048] It should also be noted that, according to exemplary embodiments, the present invention may include conventional techniques (e.g., techniques implemented and / or integrated in exemplary embodiments, modifications, variations, combinations, equivalents, etc.), or may include any other applicable techniques (now and / or in the future) with the ability to perform the functions and processes / operations described in the specification and / or illustrated in the figures. All such techniques (e.g., techniques implemented in the manner of embodiments, modifications, variations, combinations, equivalents, etc.) are considered to be within the scope of the present invention of this patent document.
Claims
1. A light-emitting device, characterized in that, The device includes a first light guide, a second light guide, a first light source assembly, and a second light source assembly. The first light source assembly is disposed at one end of the first light guide, and the second light source assembly is disposed at one end of the second light guide. The first light source assembly includes a control unit and a first light source, and the second light source assembly includes a second light source. The control unit is connected to the first light source and the second light source respectively to control the emission of light from the first light source and the second light source. The first light guide is used to conduct light emitted by the first light source, and the second light guide is used to conduct light emitted by the second light source.
2. The light-emitting device according to claim 1, characterized in that, The first optical guide and the second optical guide are arranged in an intersecting manner.
3. The light-emitting device according to claim 2, characterized in that, The end of the first light guide with the first light source component is adjacent to the end of the second light guide with the second light source component, and the end of the first light guide away from the first light source component and the end of the second light guide away from the second light source component extend in opposite directions.
4. The light-emitting device according to claim 1, characterized in that, The first light source assembly further includes a first circuit board, and the second light source assembly further includes a second circuit board. The control unit and the first light source are both disposed on the first circuit board, and the second light source is disposed on the second circuit board; the first circuit board and the second circuit board are electrically connected.
5. The light-emitting device according to claim 4, characterized in that, The first light source is located on the side of the first circuit board closer to the first light guide, the control unit is located on the side of the first circuit board away from the first light guide, and the second light source is located on the side of the second circuit board closer to the second light guide.
6. The light-emitting device according to claim 4, characterized in that, The first light source assembly further includes a first housing, and the second light source assembly further includes a second housing. The first circuit board is disposed inside the first housing, and the second circuit board is disposed inside the second housing. One end of the first light guide with the first light source assembly extends into the first housing, and one end of the second light guide with the second light source assembly extends into the second housing.
7. The light-emitting device according to claim 4, characterized in that, The first circuit board and the second circuit board are connected by a conductive medium.
8. The light-emitting device according to claim 7, characterized in that, One end of the conductive medium is connected to the first circuit board via a connector or soldering on the first board, and the other end of the conductive medium is connected to the second circuit board via a connector or soldering on the second board.
9. The light-emitting device according to claim 7, characterized in that, The conductive medium is a ribbon cable, a flexible circuit board, or a wire harness.
10. The light-emitting device according to claim 1, characterized in that, The light-emitting device includes a connecting bridge, which is fixedly connected to the first light source component and the second light source component respectively.
11. The light-emitting device according to claim 10, characterized in that, The connecting bridge is detachably connected to the first light source assembly and the second light source assembly, and the fixed position of the first light source assembly on the connecting bridge and / or the fixed position of the second light source assembly on the connecting bridge is set to be adjustable so that the distance between the first light source assembly and the second light source assembly is adjustable.