LED car lamps

Abstract

We provide LED car lamps with a wider beam angle and more uniform light output. [Solution] The LED car lamp comprises an LED chip assembly 3 and a light-transmitting member 1. The LED chip assembly includes a substrate 31 and an LED chip group 32. The LED chip group is provided on both sides of the substrate in the thickness direction, and each LED chip group contains an LED chip 321. The light-transmitting member is fitted to the outside of the LED chip assembly. Each light-transmitting member is provided with a light-transmitting window 11 at a position corresponding to the LED chip group. The inner walls of the light-transmitting window, which face each other along the length direction of the substrate, are the top inner wall and bottom inner wall of the light-transmitting window, respectively. Both the top inner wall and the bottom inner wall are provided with a first protrusion extending along the thickness direction of the substrate, and a second protrusion is provided on the outer surface of the top wall of the light-transmitting member. The direction of extension of the second protrusion is perpendicular to the direction of extension of the first protrusion. This disperses light in various directions to make the light emission more uniform.

Description

Technical Field

[0001] The present invention relates to the field of automotive lighting, and particularly to LED vehicle lamps.

Background Art

[0002] LED vehicle lamps are widely adopted in the field of automotive lighting due to advantages such as high efficiency, long lifespan, fast response speed, and high controllability. Currently, many commercially available LED vehicle lamps have LED chips arranged on both opposite sides of a circuit board. With such a structure, the vehicle lamp mainly emits light outward from these two opposite sides, forming two main light-emitting surfaces. However, due to such structural arrangement constraints, in the top region of the vehicle lamp, that is, the direction perpendicular to the circuit board surface, and the regions on both sides of the circuit board surface, that is, the side regions perpendicular to the two main light-emitting surfaces, light cannot be effectively emitted, resulting in light-emitting dark areas and weak light areas. Due to such limitations, the light output angle and illuminance distribution range of the LED vehicle lamp are relatively limited. For external signal lamps and lighting lamps of automobiles that require a large light-emitting angle and a uniform surface light-emitting effect, such as side marker lamps and number plate lights, the conventional double-sided light-emitting type LED vehicle lamps often have insufficient light emission at the top and both sides, making it difficult to meet their light distribution requirements.

Summary of the Invention

[0003] Therefore, how to realize an LED vehicle lamp with a wider light-emitting angle, more uniform light output, and particularly capable of meeting the application requirements such as side marker lamps and number plate lamps is an urgent technical problem to be solved in this field.

Problems to be Solved by the Invention

[0004] The objective of the present invention is to provide an LED vehicle lamp for solving the problems in conventional LED vehicle lamps, namely, the limited light-emitting angle and non-uniform light emission.

Means for Solving the Problems

[0005] To achieve the above objective, the present invention provides an LED car lamp comprising an LED chip assembly and a light-transmitting member, wherein the LED chip assembly includes a substrate and a group of LED chips, the LED chip groups are arranged on both sides of the substrate in the thickness direction, each LED chip group contains an LED chip, the light-transmitting member is fitted to the outside of the LED chip assembly, the light-transmitting member is provided with light-transmitting windows at positions corresponding to the LED chip groups, the inner walls on both sides of the light-transmitting window that face each other along the length direction of the substrate are the top inner wall and bottom inner wall of the light-transmitting window, both of which are provided with a first protrusion extending along the thickness direction of the substrate, and a second protrusion is provided on the outer surface of the top wall of the light-transmitting member, the direction of extension of the second protrusion is perpendicular to the direction of extension of the first protrusion.

[0006] As is clear from the above plan, in this invention, by providing a first protrusion on the inner wall of the top and bottom of the light-transmitting window and a second protrusion on the outer surface of the light-transmitting member, the direction of light is changed and diffuse reflection is achieved by emitting light from multiple angles, thereby enabling sufficient light to be irradiated to the dark areas around and at the top, solving the problem that conventional LED car lamps could only irradiate light toward two opposing surfaces and had a limited emission angle. At the same time, by having the extension direction of the first protrusion and the extension direction of the second protrusion perpendicular to each other, the light is dispersed in various directions, resulting in more uniform emission.

[0007] Furthermore, the outer periphery sidewall of the light-transmitting member is an outer periphery sidewall that has been treated with haze.

[0008] As is clear from the above plan, by hazing the outer perimeter sidewall, a diffuse reflection region can be formed, resulting in softer light compared to a convex structure. This is compatible with the characteristics of the outer perimeter sidewall, which originally has a constant light output, and the light source intensity emitted from the final LED lamp body becomes more uniform.

[0009] Furthermore, the top surface of the light-transmitting member has an arched structure, both ends of the second protrusion extend above the lowest end of the LED chip group, and the outer peripheral sidewall of the light-transmitting member, which is haze-treated, is located below the second protrusion.

[0010] As is clear from the above plan, the above structural arrangement is compatible with the light emission path of the LED chip, achieving uniformity of light emission.

[0011] Furthermore, the inner walls on both sides of the light-transmitting window that face each other along the width direction of the substrate are both side inner walls of the light-transmitting window, and a first inclined inner wall is provided on one side of each side inner wall that is closer to the group of LED chips, and the first inclined inner wall is inclined with respect to the side inner wall.

[0012] As is clear from the above plan, by arranging the light rays to pass through the first inclined side wall, the direction of light transmission is changed, and in cooperation with the first and second protrusions, a wider emission angle can be achieved.

[0013] Furthermore, a locking groove is provided inside the light-transmitting member, the LED chip group is located close to the first edge of the substrate, the first edge of the substrate is inserted into the locking groove, and the thickness of the locking groove matches the thickness of the substrate.

[0014] As is clear from the above plan, fixing the substrate in the locking groove ensures the stability of the light source, and allows for more stable installation of the LED car lamp.

[0015] Furthermore, a second inclined inner wall is connected to the lower end of the inner wall of the locking groove, and the second inclined inner wall is provided at an angle to the plane formed by the length and width of the substrate.

[0016] As is clear from the above plan, by providing a second inclined inner wall, a buffering effect is achieved when the substrate is mounted, and the second inclined inner wall can further change the direction of light and distribute the light rays.

[0017] Furthermore, there are multiple first-order protrusions, which are arranged in the width direction of the substrate, and there are also multiple second-order protrusions, which are arranged in the thickness direction of the substrate.

[0018] As is clear from the above plan, by providing multiple first convex ridges and multiple second convex ridges, the light dispersion efficiency and degree of dispersion can be improved.

[0019] Furthermore, a housing is connected to the lower end of the light-transmitting member, the LED chip group is separated from the second end of the substrate, the second end is inserted into the housing, and contact pins are provided on one end of the substrate that is separated from the LED chip group, the contact pins are provided on both sides in the thickness direction of the substrate, the housing has a notch, and the contact pins protrude from the inside of the housing through the notch to the outside.

[0020] As is clear from the above plan, providing a housing offers a certain level of protection to the substrate and further enhances the stability of the substrate's fixation.

[0021] Furthermore, the light-transmitting member is provided with a locking mounting hole, which is located below the light-transmitting window, and the housing is provided with a locking projection, which is detachably attached to the locking mounting hole.

[0022] As is clear from the above plan, the locking connection between the light-transmitting member and the housing improves assembly efficiency and ensures stability during installation.

[0023] Furthermore, a first ultrasonic welding surface is provided on one end of the housing facing the light-transmitting member, and a second ultrasonic welding surface is provided on one end of the light-transmitting member facing the housing, and when the housing and the light-transmitting member are connected, the first ultrasonic welding surface and the second ultrasonic welding surface come into contact.

[0024] As is clear from the above solution, by providing the first ultrasonic welding surface and the second ultrasonic welding surface, it becomes possible to further fixedly connect between the housing and the light-transmitting member by ultrasonic treatment, and the connection stability can be improved.

Brief Description of the Drawings

[0025] [Figure 1] It is a structural diagram of an LED vehicle lamp according to an embodiment of the present invention. [Figure 2] It is an exploded structural diagram of an LED vehicle lamp according to an embodiment of the present invention. [Figure 3] It is a structural diagram of a light-transmitting member included in an LED vehicle lamp according to an embodiment of the present invention from a first perspective. [Figure 4] It is a structural diagram of a light-transmitting member included in an LED vehicle lamp according to an embodiment of the present invention from a second perspective. [Figure 5] It is a structural diagram of a housing of an LED vehicle lamp according to an embodiment of the present invention.

Modes for Carrying Out the Invention

[0026] Hereinafter, the present invention will be further described with reference to the drawings and embodiments. Referring to FIGS. 1 to 5, the LED vehicle lamp provided in this embodiment includes a light-transmitting member 1, a housing 2, and an LED chip assembly 3. The light-transmitting member 1 is provided above the housing 2, the light-transmitting member 1 is connected to the housing 2, and the LED chip assembly 3 is disposed inside the light-transmitting member 1 and the housing 2.

[0027] Referring to Figures 1 and 2, the LED chip assembly 3 includes a substrate 31, an LED chip group 32, and contact pins 33. The substrate 31 is a circuit board, and both the LED chip group 32 and the contact pins 33 are provided on the substrate 31. The LED chip group 32 is provided on both sides of the substrate 31 in the thickness direction, and each LED chip group 32 includes multiple LED chips 321, each LED chip being a light source. The contact pins 33 are provided at one end of the substrate 31 away from the LED chip group 32, and the contact pins 33 are provided on both sides of the substrate 31 in the thickness direction. In this embodiment, there are multiple first protrusions 113, and the multiple first protrusions 113 are arranged side by side in the width direction of the substrate 31. There are multiple second protrusions 12, and the multiple second protrusions 12 are arranged side by side in the thickness direction of the substrate 31.

[0028] Referring to Figures 1 to 4, the light-transmitting member 1 is fitted to the outside of the LED chip assembly 3, and the light-transmitting member 1 is manufactured from a light-transmitting material well known to those skilled in the art. The light-transmitting member 1 is provided with light-transmitting windows 11 at positions corresponding to the LED chip groups, and the inner walls on both sides of the light-transmitting window 11 that face each other along the length direction of the substrate 31 are the top inner wall 111 and the bottom inner wall 112, respectively, and both the top inner wall 111 and the bottom inner wall 112 are provided with a first protrusion 113 that extends along the thickness direction of the substrate 31. A second protrusion 12 is provided on the outer surface of the top wall of the light-transmitting member 1, and the direction of extension of the second protrusion 12 is perpendicular to the direction of extension of the first protrusion 113. In addition, the outer peripheral side wall 13 of the light-transmitting member 1 is haze-treated. Haze treatment is a treatment method generally known to those skilled in the art, and by haze treatment, the outer surface of the outer peripheral side wall 13 of the light-transmitting member 1 becomes a rough surface with fine indentations.

[0029] In this embodiment, the top surface of the light-transmitting member 1 has an arched structure, and both ends of the second protrusion 12 extend above the lowest end of the LED chip group 32. The outer peripheral side wall 13 of the light-transmitting member 1, which has been treated with haze, is located below the second protrusion 12.

[0030] The inner walls on both sides of the light-transmitting window 11 that face each other along the width direction of the substrate 31 are both side inner walls 114 of the light-transmitting window. A first inclined inner wall 14 is provided on the side of each side inner wall 114 that is closer to the LED chip group 32, and the first inclined inner wall 14 is inclined with respect to the side inner wall 114.

[0031] A locking groove 15 is provided inside the light-transmitting member 1, and the LED chip group 32 is close to the first end 311 of the substrate 31, with the first end 311 being inserted into the locking groove 15. The thickness of the locking groove 15 matches the thickness of the substrate 31. In this embodiment, the locking groove 15 is located in the center. The LED chip group 32 does not extend into the locking groove 15; that is, the distance between the side of the LED chip group 32 closer to the upper end of the substrate 31 and the upper end of the substrate 31 is greater than the depth of the locking groove 15. A second inclined inner wall 16 is connected to the lower end of the inner wall of the locking groove 15, and the second inclined inner wall 16 is provided at an angle to the plane formed by the length and width of the substrate 31.

[0032] Referring to Figures 1 to 5, the LED chip group 32 is separated from the second end 312 of the substrate 31, and the first end 311 and the second end 312 face each other along the length of the substrate 31. The second end 312 is inserted into the housing 2. The housing 2 is provided with a notch 24, and the contact pins 33 protrude from the inside of the housing 2 through the notch 24 to the outside.

[0033] The light-transmitting member 1 is provided with a locking mounting hole 17 and a corresponding projection 18. The locking mounting hole 17 is located below the light-transmitting window 11, and the corresponding projection 18 is formed to extend downward along the circumferential direction of the light-transmitting member 1.

[0034] The housing 2 is provided with a locking projection 21 and a corresponding groove 23. The locking projection 21 is removably mounted in a locking mounting hole 17, and the corresponding projection 18 is provided to fit into the corresponding groove 23, and the corresponding projection 18 is insertable into the corresponding groove 23. In this embodiment, a first ultrasonic welding surface 22 is provided on one end of the housing 2 facing the light-transmitting member 1, and a second ultrasonic welding surface 19 is provided on one end of the light-transmitting member 1 facing the housing 2. When connecting the housing 2 and the light-transmitting member 1, the first ultrasonic welding surface 22 and the second ultrasonic welding surface 19 come into contact, further fixing the connection between the housing 2 and the light-transmitting member 1 through ultrasonic treatment, thereby improving the stability of the connection.

[0035] In this embodiment, the longitudinal direction of the substrate 31 is considered the reference direction, and the first end 311 of the substrate 31 is positioned above the second end 312 of the substrate 31.

[0036] In this embodiment, by providing a first protrusion 113 on the top inner wall 111 and the bottom inner wall 112 of the light-transmitting window 11, and a second protrusion 12 on the outer surface of the light-transmitting member 1, the direction of light emitted from the LED chip group 32 is changed, and diffuse reflection is achieved by emitting light from multiple angles, thereby enabling sufficient light to be irradiated to the dark areas around and at the top, solving the problem that conventional LED lamps could only irradiate towards two opposing surfaces, limiting the emission angle. At the same time, by making the extension direction of the first protrusion 113 and the extension direction of the second protrusion 12 perpendicular, the light is dispersed in various directions, resulting in more uniform emission. Furthermore, by hazing the outer peripheral side wall 13, it is possible to form a diffuse reflection region, resulting in softer light compared to the protrusion structure, which matches the characteristics of the outer peripheral side wall 13, a region that originally has a constant light output, and the light source intensity emitted from the final LED lamp body becomes more uniform.

[0037] The above-described details are merely more preferred specific embodiments of the present invention, and the scope of protection of the present invention is not limited thereto. Any expert in the art should understand that, within the technical scope disclosed by the present invention, equivalent substitutions or modifications based on the technical scheme and concept of the present invention are all included within the scope of protection of the present invention.

Claims

1. LED car lamps, The device comprises an LED chip assembly and a light-transmitting member, the LED chip assembly includes a substrate and a group of LED chips, the group of LED chips is provided on both sides of the substrate in the thickness direction, each of the group of LED chips includes an LED chip, and the light-transmitting member is fitted to the outside of the LED chip assembly. The light-transmitting member is provided with light-transmitting windows at positions corresponding to the LED chip group, and the inner walls on both sides of the light-transmitting window that face each other along the length direction of the substrate are the top inner wall and the bottom inner wall of the light-transmitting window, respectively, and both the top inner wall and the bottom inner wall are provided with a first protrusion extending along the thickness direction of the substrate. An LED car lamp characterized in that a second protrusion is provided on the outer surface of the top wall of the light-transmitting member, and the extension direction of the second protrusion is perpendicular to the extension direction of the first protrusion.

2. The LED car lamp according to claim 1, characterized in that the outer peripheral side wall of the light-transmitting member is an outer peripheral side wall that has been subjected to haze treatment.

3. The top surface of the light-transmitting member has an arched structure, and both ends of the second protrusion extend above the lowest end of the LED chip group. The LED car lamp according to claim 2, characterized in that the outer peripheral side wall of the light-transmitting member, which has been subjected to haze treatment, is located below the second protrusion.

4. The LED car lamp according to claim 1, characterized in that the inner walls on both sides of the light-transmitting window that face each other along the width direction of the substrate are side inner walls of the light-transmitting window, and a first inclined inner wall is provided on the side of each side inner wall that is closer to the group of LED chips, and the first inclined inner wall is inclined with respect to the side inner wall.

5. The LED car lamp according to claim 1, characterized in that a locking groove is provided inside the light-transmitting member, the group of LED chips is close to the first end of the substrate, the first end of the substrate is inserted into the locking groove, and the thickness of the locking groove is the same as the thickness of the substrate.

6. The LED car lamp according to claim 5, characterized in that a second inclined inner wall is connected to the lower end of the inner wall of the locking groove, and the second inclined inner wall is provided inclined to the plane formed by the length and width of the substrate.

7. The number of the first protrusions is multiple, and the multiple first protrusions are arranged side by side in the width direction of the substrate. The LED car lamp according to any one of claims 1 to 6, characterized in that the number of the second protrusions is multiple, and the multiple second protrusions are arranged in the thickness direction of the substrate.

8. A housing is connected to the lower end of the light-transmitting member, the LED chip group is separated from the second end of the substrate, and the second end is inserted into the housing. An LED car lamp according to any one of claims 1 to 6, characterized in that a contact pin is provided at one end of the substrate away from the group of LED chips, the contact pin is provided on both sides in the thickness direction of the substrate, a notch is provided in the housing, and the contact pin protrudes from the inside of the housing through the notch to the outside.

9. The light-transmitting member is provided with a locking mounting hole, and the locking mounting hole is located below the light-transmitting window. The LED car lamp according to claim 8, characterized in that the housing is provided with a locking projection, and the locking projection is detachably mounted in the locking mounting hole.

10. A first ultrasonic welding surface is provided at one end of the housing facing the light-transmitting member, and a second ultrasonic welding surface is provided at the other end of the light-transmitting member facing the housing. The LED car lamp according to claim 9, characterized in that when the housing is connected to the light-transmitting member, the first ultrasonic welding surface is in contact with the second ultrasonic welding surface.

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