LED vehicle lamp with uniform light emission
The LED vehicle lamp with a frustum-shaped light guide column and concave conical surface ensures uniform light emission and improved distribution by ensuring total reflection and horizontal light rays, addressing non-uniformity and glare issues in conventional LED lamps.
Patent Information
- Application Number
- JP2025001480U
- Authority / Receiving Office
- JP · JP
- Patent Type
- Utility models
- Current Assignee / Owner
- Priority Date
- 2024-10-11
- Filing Date
- 2025-05-12
- Publication Date
- 2025-07-11
- Estimated Expiration
- 2035-05-12
AI Technical Summary
Conventional LED vehicle lamps suffer from non-uniform light emission, large light-emitting points, and poor light distribution, with significant dead angles and high-brightness glare.
The LED vehicle lamp employs a light guide column with a frustum-shaped end and a concave conical surface, featuring specific electroplating treatment areas to ensure total reflection and horizontal emission, combined with a housing structure for uniform light distribution and improved heat dissipation.
The solution achieves uniform light emission without dead angles, reduces the size of the light-emitting area, and enhances light distribution efficiency, while minimizing glare and manufacturing complexity.
Smart Images
Figure 0003251978000001_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the field of automotive parts, and more specifically, to an LED vehicle lamp with uniform light emission.
Background Art
[0002] LED vehicle lamps have the characteristics of low voltage, long life, instant lighting, and the ability to emit natural light. Compared with the current mainstream automotive light sources, halogen lamps and high-intensity discharge lamps (HID), they have obvious advantages. With higher driving safety, LED lamps have already been widely used in vehicle lamps.
[0003] However, most of the currently commercially available LED vehicle lamps are double-sided light-emitting types and have certain light-emitting dead angles. Although there are also four-sided light-emitting LED vehicle lamps, all of the above LED vehicle lamps have the problems that the size of the light-emitting point is large, the central light-emitting intensity of the light-emitting point is large, but the peripheral light-emitting intensity is not uniform and cannot match that of halogen lamps.
Summary of the Invention
Problems to be Solved by the Invention
[0004] In order to solve the problem that the light emission of conventional LED vehicle lamps is not uniform, the purpose of the present invention is to provide an LED vehicle lamp with uniform light emission.
Means for Solving the Problems
[0005] To achieve the above object of the present invention, the present invention provides an LED vehicle lamp with uniform light emission. The lamp includes a substrate provided with at least one LED chip. A light guide column is provided on the light emitting surface side of the LED chip. The surface of one end of the light guide column away from the LED chip is a concave conical surface recessed toward the LED chip. One end of the light guide column away from the LED chip is the first end. The first end of the light guide column is frustum-shaped. The included angle between the generatrix and the axis of the frustum body of the first end of the light guide column is (5°, 6°] (greater than 5° and less than or equal to 6°). The first electroplating treatment area is provided only on a part of the first end of the light guide column. The first electroplating treatment area is arranged close to the LED chip. The second electroplating treatment area is provided on the concave conical surface.
[0006] As is apparent from the above solutions, the light guide column of the LED vehicle lamp of the present invention is provided with a frustum of a cone structure, having a certain inclination degree. After the light rays are reflected multiple times by the frustum of a cone structure, the reflection angle gradually becomes smaller. When reaching the part where the first electroplating treatment area is not provided, the light rays are emitted in a substantially horizontal direction. By arranging the first electroplating treatment area, not only can the total reflection of the light rays be ensured, but also until the light rays are emitted horizontally in the horizontal lateral direction from the tip of the first electroplating area, some of the light rays that do not satisfy the total reflection generated by the chamfering of (5°, 6°) are forced to perform specular reflection, effectively shortening the length of the light-emitting area and reducing the size of the light-emitting area (closer to the light-emitting sizes of halogen filaments and HIDs), meeting the light distribution needs of the lamp and obtaining better light distribution data. By setting the included angle between the generatrix and the axis of the frustum of a cone body within the range of (5°, 6°), it is ensured that the incident angle at which the light rays contact the first end of the light guide column (i.e., the frustum of a cone structure) is greater than or equal to the critical angle at least once, so that total reflection can be realized. Then, by arranging the first electroplating treatment area, until reaching the part where the first electroplating treatment area is not provided, in the subsequent reflection process, it is ensured that the light rays continuously perform total reflection and the reflection angle continuously becomes smaller, realizing the substantially horizontal emission of the light rays. Preventing the influence on the final luminous efficiency of the LED vehicle lamp due to the incident angle at which the light rays contact the light guide column being smaller than the critical angle and unable to perform total reflection because the inclination angle is too large, and avoiding the influence on the luminous effect of the LED vehicle lamp because the height of the light guide column is too high and exceeds the focal length designed for the lamp, increasing the size of the LED vehicle lamp because the inclination angle is too small and it is necessary to ensure that the light rays are emitted substantially horizontally. By providing the second electroplating treatment area on the concave conical surface, after being reflected by the concave conical surface, the light rays are irradiated to the rear side or horizontally, making the spot more uniform, emitting light uniformly in 360°, and effectively improving the light distribution efficiency of the vehicle lamp, and effectively avoiding the problem that a high-brightness glare occurs on the front surface of the LED vehicle lamp.The frustum structure provided with the first electroplating treatment area and the concave conical surface provided with the second electroplating treatment area realize the redistribution of light rays, make the light rays evenly distributed, and furthermore, all the LED vehicle lamps can emit light evenly within the effective emission angle, without dead angles or dark areas. Also, the above structure can avoid the problem that the light emission size is too large, resulting in poor light distribution effect, by changing the large surface light source with a large LED chip size into similar small point light sources.
[0007] As a further solution, a first electroplating member is externally fitted outside the light guide column, a part of the first end of the light guide column is exposed to the first electroplating member, and the area of the light guide column built into the first electroplating member forms the first electroplating treatment area. A second electroplating member is provided on the concave conical surface. One end of the second electroplating member close to the concave conical surface is the first end of the second electroplating member, and the first end of the second electroplating member is bonded to the concave conical surface to form the second electroplating treatment area.
[0008] As is clear from the above solution, by arranging the first electroplating member and the second electroplating member, the difficulty and cost of directly performing the local electroplating treatment outside the concave conical surface and the light guide column are significantly reduced, and the structures of the first electroplating member and the second electroplating member are simple and easier to use.
[0009] As a further solution, the light guide column includes a first light guide member and a second light guide member that are bonded to each other. The first light guide member and the second light guide member are made of a light-transmitting material. The first light guide member is closer to the LED chip than the second light guide member. The first light guide member is cylindrical, and the second light guide member is frustum-shaped. One end of the second light guide member close to the first light guide member is located within the first electroplating member.
[0010] As a further solution, at least a part of the first light guide member enters into the first electroplating member.
[0011] As is apparent from the above solutions, by arranging the first light guide member and the second light guide member, the installation of the light guide column becomes easier and the manufacturing process becomes simpler.
[0012] As a further solution, the longitudinal section of the concave conical surface is an inverted triangle, and the apex angle of the inverted triangle is between 72° and 74°.
[0013] As is apparent from the above solutions, by setting the apex angle between 72° and 74°, the situation where the light ray is reflected through the concave conical surface and then returns to the light guide column and cannot be transmitted is avoided, and the utilization rate of the light ray becomes higher.
[0014] As a further solution, the LED vehicle lamp further includes a housing. A first through hole is provided in the housing. The portion of the first end of the light guide column where the first electroplating treatment area is not provided is located in the first through hole, and the housing portions on both sides of the first through hole are made of a light-transmitting material.
[0015] As is apparent from the above solutions, by arranging the housing, a good protection effect on the LED vehicle lamp is achieved, the service life of the LED vehicle lamp is guaranteed, and the housing portions on both sides of the first through hole are set to be of a light-transmitting material to ensure 360° uniform light emission.
[0016] As a further solution, the housing includes an upper housing and a lower housing that are connected to each other. The first through hole is provided in the upper housing. The upper housing includes a second through hole. The light guide column enters the upper housing through the second through hole, and the second end of the light guide column, the substrate, and the LED chip are all located in the lower housing.
[0017] As is apparent from the above solutions, by including the upper housing and the lower housing in the housing, the installation of the LED vehicle lamp becomes easier.
[0018] As a further solution, a chuck is externally fitted to the outside of the housing.
[0019] As a further solution, the LED vehicle lamp further includes a power supply unit, the power supply unit includes a driving substrate and a power connector, the power connector includes power pins, the driving substrate is electrically connected to the power connector, and the electrical connection between the driving substrate and the substrate is realized by a mounting post.
[0020] As a further solution, the LED vehicle lamp further includes a heat dissipation unit, the heat dissipation unit includes a fan and is electrically connected to the substrate.
Advantages of the Invention
[0021] As is clear from the above solutions, by arranging the chuck, the power supply unit and the heat dissipation unit, the normal operation of the LED vehicle lamp is guaranteed. In addition, the LED is close to the heat dissipation member and the fan, ensuring the heat dissipation effect of the LED vehicle lamp.
Brief Description of the Drawings
[0022]
Figure 1
Figure 2
Figure 3
Figure 4
Figure 5
Figure 6
Figure 7
Figure 8
Figure 9
Modes for Carrying Out the Invention
[0023] Referring to FIGS. 1 to 9, the light-emitting uniform LED vehicle lamp provided by this embodiment includes a housing. A heat dissipation unit, a power supply unit, a substrate 5, an LED chip set 6, and a light guide column are provided in the housing, and a chuck 10 is externally fitted to the outside of the housing.
[0024] Referring to FIGS. 2 to 7, the LED chip set 6 is provided on the substrate 5 and includes at least one LED chip. In this embodiment, the LED chip set 6 includes nine LED chips.
[0025] A light guide column is provided on the light emitting surface side of the LED chip set 6. The surface of one end of the light guide column away from the LED chip set 6 is a concave conical surface 81 that is concave toward the LED chip set 6. One end of the light guide column away from the LED chip set 6 is the first end. The first end of the light guide column is frustum-shaped. The included angle between the generatrix and the axis of the frustum body at the first end of the light guide column is in the range of (5°, 6°]. The first electroplating treatment area is provided only on a part of the first end of the light guide column. The first electroplating treatment area is arranged close to the LED chip. The second electroplating treatment area is provided on the concave conical surface 81. Referring to FIG. 6, the first end of the light guide column is installed as a frustum structure and has a certain inclination. After the light rays L1 and L2 are reflected multiple times by the side wall of the frustum, until they reach the part where the first electroplating treatment area is not provided, the reflection angle gradually becomes smaller, and substantially horizontal transmission can be realized. By arranging the first electroplating treatment area, total reflection of the light rays is guaranteed. By arranging the frustum structure, in the multiple reflection process, the incident angle becomes smaller and smaller. When it becomes smaller than the critical angle, the light rays are no longer completely reflected and are transmitted. By arranging the first electroplating treatment area, the light rays are forced to perform total reflection. After the light rays are reflected multiple times, until they become substantially horizontal (the reflection angle is about 6°), the reflection angle gradually becomes smaller. When the first electroplating treatment area is no longer provided, the effect of emitting the light rays substantially horizontally is achieved. By setting the included angle between the generatrix and the axis of the frustum body in the range of (5°, 6°], it is guaranteed that at least once, the incident angle at which the light rays contact the first end of the light guide column (i.e., the frustum structure) is greater than or equal to the critical angle, and total reflection can be realized. Then, by arranging the first electroplating treatment area, until it reaches the part where the first electroplating treatment area is not provided, in the subsequent reflection process, it is guaranteed that the light rays continuously perform total reflection and the reflection angle continuously becomes smaller, realizing the substantially horizontal emission of the light rays.Since the tilt angle is too large, the incident angle at which the light rays contact the light guide column is smaller than the critical angle, and total internal reflection cannot be performed. This not only prevents affecting the final light-emitting effect of the LED vehicle lamp, but also, since the tilt angle is too small, in order to ensure that the light rays are emitted substantially horizontally, the height of the light guide column is too high, increasing the size of the LED vehicle lamp and avoiding affecting the light-emitting effect of the LED vehicle lamp. The provision of the second electroplating treatment region on the concave conical surface 81 causes the light rays L3 and L4 to be irradiated rearwardly or horizontally after being reflected by the concave conical surface 81, making the spot more uniform, effectively improving the light distribution efficiency of the vehicle lamp, and effectively avoiding the problem of high-brightness glare occurring on the front face of the LED vehicle lamp.
[0026] In this embodiment, the light guide column includes a first light guide member 7 and a second light guide member 8 that are bonded to each other. The first light guide member 7 is closer to the LED chip set 6 than the second light guide member 8. At least the second light guide member 8 is made of a light-transmitting material. The first light guide member 7 is made of a cylindrical light-transmitting material. The second light guide member 8 is in the shape of a frustum of a cone, and the included angle α between the generatrix and the axis of the frustum of the cone is in the range of (5°, 6°]. In this embodiment, the included angle α between the generatrix and the axis of the frustum of the cone is 6°. The concave conical surface 81 is provided at one end of the second light guide member 8 that is away from the first light guide member 7.
[0027] The first electroplating treatment area and the second electroplating treatment area may be formed by local electroplating or by other processes. Specifically, in this embodiment, the outer walls of the first light guide member 7 and the second light guide member 8 are fitted into the first electroplating member 92. Specifically, one end of the first light guide member 7 away from the LED chip set 6 enters the first electroplating member 92, one end of the second light guide member 8 close to the first light guide member 7 enters the first electroplating member 92, and a part of the second light guide member 8 is exposed in the first electroplating member 92. The area where the second light guide member 8 and the first light guide member 7 are built in the first electroplating member 92 forms the first electroplating treatment area and realizes seamless butting and fixing of the first light guide member 7 and the second light guide member 8. The second electroplating member 91 is provided on the concave conical surface 81. The second electroplating member 91 includes a first end 911 and a second end 912. The first end 911 of the second electroplating member 91 is attached to the concave conical surface 81 to form the second electroplating treatment area. By arranging the first electroplating member 92 and the second electroplating member 91, the difficulty and cost of directly performing the local electroplating treatment outside the concave conical surface 81 and the light guide column are greatly reduced. The structures of the first electroplating member 92 and the second electroplating member 91 are simple, easier to use, and the mass production cost is low. Of course, the first light guide member 7 and the second light guide member 8 may be arranged integrally.
[0028] Referring to FIG. 5, in this embodiment, the longitudinal section of the concave conical surface 81 is an inverted triangle, and the angle of the apex angle β of the inverted triangle is 72° - 74°. In this embodiment, the apex angle β is 72°. With this angle setting, the problem that the light rays are reflected through the concave conical surface 81 and then return to the light guide column and cannot be transmitted through the light guide column is avoided. All the light rays emitted from the LED chip set 6 are effectively utilized, and the light output efficiency is higher.
[0029] Referring to FIGS. 1 to 9, in this embodiment, the housing includes an upper housing 1 and a lower housing 2, and the chuck 10 is externally fitted to the lower housing 2. A first protrusion 16 is provided on the outer wall of the upper housing 1, and a first concave groove 23 is provided on the inner peripheral wall of the lower housing 2. The first protrusion 16 and the first concave groove 23 are engaged with each other, and the upper housing 1 and the lower housing 2 are connected to each other by the first protrusion 16 and the first concave groove 23. Specifically, the upper housing 1 includes a first housing 11 and a second housing 12. A second concave groove 111 is provided in the first housing 11, and a second protrusion 121 is provided in the second housing 12. Thus, the joining of the first housing 11 and the second housing 12 is realized to form the upper housing 1 in a position-limiting manner. The lower housing 2 includes a third housing 21 and a fourth housing 22. A screw hole 24 is provided in the lower housing 2. Thus, the joining of the third housing 21 and the fourth housing 22 is realized, and further, the joining of the first housing 11 and the second housing 12 is realized.
[0030] The upper housing 1 is provided with a first through hole 13, a second through hole 14, and a third concave groove 15. The region of the second light guide member 8 that is exposed to the first electroplated member 92 is located within the first through hole 13, and the housing portions 17 on both sides of the first through hole 13 are made of a light-transmissive material. The light guide column and the first electroplated member 92 enter the upper housing 1 through the second through hole 14, and the second end 912 of the second electroplated member 91 is located in the third concave groove 15. One end of the first light guide member 7 close to the LED chip set 6, the substrate 5, and the LED chip set 6 are all located in the lower housing 2.
[0031] The lower housing 2 is provided with a cavity 25, and a heat dissipation unit and a power supply unit are provided in the cavity 25. The power supply unit includes a driving substrate 41 and a power connector 42. The power connector 42 includes a power pin 421, and the LED vehicle lamp is energized by the power pin 421. The driving substrate 41 is electrically connected to the power connector 42, and the electrical connection between the driving substrate 41 and the substrate 5 is realized by the mounting post 43. The heat dissipation unit includes a fan 31 and a fin-shaped heat radiator 32. The heat dissipation unit is electrically connected to the substrate, and the fan 31 communicates with the external air. The heat dissipation unit is close to the LED chip set 6, and the heat dissipation effect is better, solving the problem that in the conventional LED vehicle lamp, the light source is far from the heat dissipation structure and affects the heat dissipation effect.
[0032] The LED vehicle lamp of this embodiment realizes the redistribution of light rays and makes the light rays evenly distributed by the frustum structure provided with the first electroplating treatment area and the concave conical surface 81 provided with the second electroplating treatment area. Furthermore, all LED vehicle lamps can emit light evenly within the effective emission angle, without dead angles or dark areas. The above structure can avoid the problem that the light emission size is too large, so the light rays are dispersed and the light distribution effect of the lamp is poor by changing the large surface light source with a large LED chip size into a similar small point light source. In addition, the first electroplating member 92 and the second electroplating member 91 form the first electroplating treatment area and the second electroplating treatment area, and the difficulty and cost of directly performing the local electroplating treatment outside the concave conical surface and the light guide column are greatly reduced. The structures of the first electroplating member and the second electroplating member are simple and easier to use.
[0033] Finally, it should be emphasized that the above are only preferred embodiments of the present invention and do not limit the present invention. For those skilled in the art, various modifications and changes can be made to the present invention, and any corrections, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should all be included in the protection scope of the present invention.
Claims
1. An LED vehicle lamp with uniform light emission, comprising a substrate provided with at least one LED chip, a light guide column being provided on the light emitting surface side of the LED chip, the surface of one end of the light guide column away from the LED chip being a concave conical surface recessed towards the LED chip, one end of the light guide column away from the LED chip is the first end, the first end of the light guide column is frustum-shaped, and the included angle between the generatrix of the frustum body of the first end of the light guide column and the axis is (5°, 6°], a first electroplating treatment area is provided only on a part of the first end of the light guide column, and the first electroplating treatment area is arranged close to the LED chip, a second electroplating treatment area is provided on the concave conical surface, and the LED vehicle lamp with uniform light emission is characterized in that.
2. A first electroplating member is externally fitted outside the light guide column, a part of the first end of the light guide column is exposed to the first electroplating member, and the area of the light guide column built into the first electroplating member forms the first electroplating treatment area, a second electroplating member is provided on the concave conical surface, one end of the second electroplating member close to the concave conical surface is the first end of the second electroplating member, and the first end of the second electroplating member is fitted to the concave conical surface to form the second electroplating treatment area. The LED vehicle lamp with uniform light emission according to Claim 1 is characterized in that.
3. The light guide column includes a first light guide member and a second light guide member that are bonded to each other, the first light guide member and the second light guide member are made of a light-transmitting material, the first light guide member is closer to the LED chip than the second light guide member, the first light guide member is columnar, the second light guide member is frustum-shaped, and one end of the second light guide member close to the first light guide member is located within the first electroplating member. The LED vehicle lamp with uniform light emission according to Claim 2 is characterized in that.
4. At least a part of the first light guide member enters into the first electroplating member. The LED vehicle lamp with uniform light emission according to Claim 3 is characterized in that.
5. The longitudinal section of the concave conical surface is an inverted triangle, and the apex angle of the inverted triangle is between 72° and 74°. The LED vehicle lamp with uniform light emission according to Claim 1 is characterized in that.
6. The LED vehicle lamp further includes a housing, a first through hole is provided in the housing, a portion of the first end of the light guide column where the first electroplating treatment area is not provided is located in the first through hole, and housing portions on both sides of the first through hole are made of a light-transmitting material. The LED vehicle lamp with uniform light emission according to claim 1, characterized in that.
7. The housing includes an upper housing and a lower housing that are connected to each other. The first through hole is provided in the upper housing, the upper housing includes a second through hole, and the light guide column enters the upper housing through the second through hole. The LED vehicle lamp with uniform light emission according to claim 6, characterized in that the second end of the light guide column, the substrate, and the LED chip are all located in the lower housing.
8. The LED vehicle lamp with uniform light emission according to claim 6 or 7, characterized in that a chuck is externally fitted to the outside of the housing.
9. The LED vehicle lamp further includes a power supply unit, the power supply unit includes a drive substrate and a power supply connector, the power supply connector includes power supply pins, the drive substrate is electrically connected to the power supply connector. The LED vehicle lamp with uniform light emission according to any one of claims 1 to 7, characterized in that electrical connection between the drive substrate and the substrate is realized by a mounting post.
10. The LED vehicle lamp further includes a heat dissipation unit, the heat dissipation unit includes a fan, and is characterized in that it is electrically connected to the substrate. The LED vehicle lamp with uniform light emission according to any one of claims 1 to 7.