A thick-walled part for eliminating bright spots on thick-walled parts

Abstract

The present invention provides a thick-walled part for eliminating bright spots, which includes a main body. The main body is a two-color injection molded thick-walled part, with a black material structure at the top and a transparent material at the bottom. The upper surface of the transparent material is a horizontal light incident surface, and above the horizontal light incident surface is an LED light source. The rear surface of the main body is a parabolic light concentrating surface, and the front part of the main body is a light emitting surface with diffusion patterns. Most of the light rays of the LED light source enter the main body through the horizontal light incident surface of the main body, are reflected by the parabolic light concentrating surface on the rear surface of the main body, and are totally reflected inside the main body and finally exit from the light emitting surface with diffusion patterns at the front part of the main body. Through two-color injection molding, the black material structure for eliminating bright spots is combined with a common transparent thick-walled part. The structure is simple and convenient without an additional shielding structure, saving a large amount of space, so as to solve the problem of optical bright spots of the thick-walled part.

Description

Technical Field

[0001] The present invention relates to the field of automotive optical thick-wall parts, and particularly to a thick-wall part for eliminating bright spots on thick-wall parts. Background Art

[0002] With the rapid development of automotive headlight technology, in addition to strictly meeting regulatory requirements for the designed headlights, vehicle customers are paying more and more attention to the appearance requirements of headlights, especially the lighting effect. To some extent, a beautiful headlight appearance can quickly enhance the visual perception of a vehicle. For automotive headlights, customers like headlights with novel designs and perfect lighting effects. Therefore, more and more thick-wall parts are used in automotive headlights to meet the requirements of transparency, uniformity, and diverse shapes. On the other hand, due to the transparent effect of thick-wall parts, many customers like the floating thick-wall part shape.

[0003] Although existing thick-wall parts can meet the requirements of vehicle customers for the shape and appearance of the vehicle, most traditional thick-wall parts will have many unexpected bright spots once used in floating shapes, including primary bright spots, secondary bright spots, and even tertiary bright spots. These bright spots are mainly caused by LED light sources and are emitted from the surface of the shape after multiple total reflections in the thick-wall parts, which can be directly observed by observers and greatly affect the aesthetics. Summary of the Invention

[0004] Aiming at the deficiencies of the prior art, the purpose of the present invention is to provide a thick-wall part for eliminating bright spots on thick-wall parts, which combines a black material structure for eliminating bright spots with a common transparent thick-wall part. The structure is simple and convenient without an additional shielding structure, saving a large amount of space, so as to solve the problem of optical bright spots on thick-wall parts.

[0005] The present invention provides a thick-wall part for eliminating bright spots on thick-wall parts, including a body. The body is a two-color injection molded thick-wall part, with a black material structure at the top and a transparent material at the bottom. The upper surface of the transparent material is a horizontal light incident surface, and an LED light source is located above the horizontal light incident surface. The rear surface of the body is a parabolic light collecting surface, and the front part of the body is a light emitting surface with diffusion patterns. Most of the light rays of the LED light source enter the body through the horizontal light incident surface of the body, are reflected by the parabolic light collecting surface on the rear surface of the body, and are totally reflected inside the body and finally exit from the light emitting surface with diffusion patterns at the front part of the body.

[0006] A further improvement lies in that: some of the light rays of the LED light source enter the body, are reflected by the parabolic light collecting surface on the rear surface and reach the black material structure at the top, and are absorbed by the black material structure at the top, eliminating the generation of secondary optical bright spots.

[0007] A further improvement lies in that: part of the light rays of the LED light source are incident into the body, directly reaching the bottom of the body, and after being reflected by the bottom, they reach the black material structure at the top. Through the absorption of the black material structure at the top, the generation of secondary optical bright spots is eliminated.

[0008] A further improvement lies in that: part of the light rays two of the LED light source reach the black material structure at the top. The part of the light rays two are large-angle light rays outside the 120-degree light emission of the LED light source and are directly absorbed by the black material structure at the top, thereby eliminating the generation of primary bright spots.

[0009] A further improvement lies in that: the number of the LED light sources is at least one, and the color of the LED light source is red for the tail light brake or position light system; or yellow for the turn signal system; or white for the headlight daytime running light or headlight position light system; or other colors for other design requirements.

[0010] A further improvement lies in that: the black material structure is fixed outside the 120-degree light emission angle of the LED light source, and the starting position of the black material structure is at the end of the 120-degree line of the LED light source.

[0011] A further improvement lies in that: the height of the black material structure is determined by the thickness of the LED light source and is 0.5 mm higher than the LED light-emitting center.

[0012] The material of the body can be polycarbonate (i.e., PC), can be polymethyl methacrylate (i.e., PMMA), or can be other materials for other design requirements.

[0013] The beneficial effects of the present invention are as follows: By two-color injection molding, the black material structure for eliminating bright spots is combined with an ordinary transparent thick-walled part. The structure is simple and convenient without an additional shielding structure, saving a large amount of space to eliminate the optical bright spot problem of the thick-walled part. It has general versatility and is applicable to most thick-walled part shapes, making the thick-walled part more suitable for various shapes, especially for suspended shapes without any optical bright spots affecting the aesthetics, and enhancing the transparent and clear visual effect of the thick-walled part. Description of the Drawings

[0014] Figure 1 is the front view of the present invention.

[0015] Figure 2 is the left view of the present invention.

[0016] Figure 3 is the top view of the present invention.

[0017] Figure 4 is the Figure 1 cross-sectional view of the A-A plane in the present invention.

[0018] Figure 5It is a schematic diagram of the LED emission angle and the position of the black material structure of the present invention.

[0019] Wherein: 1 - body, 2 - horizontal light incident surface of the body, 3 - black material structure, 4 - LED light source, 5 - parabolic condenser surface on the rear surface of the body, 6 - part of light ray one, 7 - part of light ray two, 8 - part of light ray three, 9 - light-emitting surface with diffusion pattern. Specific embodiments

[0020] To deepen the understanding of the present invention, the following will further elaborate on the present invention in conjunction with embodiments. These embodiments are only used to explain the present invention and do not constitute a limitation to the protection scope of the present invention.

[0021] Figure 1 、 2 、3 are respectively the front view, left view and top view of this embodiment, Figure 4 For Figure 1 the longitudinal sectional view of the body, Figure 5 is Figure 4 the partial enlarged view of Figure 1 As shown, this embodiment provides a method for eliminating optical bright spots, including 15 LED light sources. If the LED light source is red, then this embodiment can be used as a tail light brake or position light system; if the LED light source is yellow, then this embodiment can be used as a turn signal system; if the LED light source is white, then this embodiment can be used as a front headlight daytime running light system or a front headlight position light system. Figure 4 is a section taken from Figure 1 the optical system corresponding to one LED light source in

[0022] Most of the light rays of the LED light source 4 enter the body 1 through the horizontal light incident surface 2 of the body 1, are reflected by the parabolic condenser surface 5 on the rear surface of the body 1, and are totally reflected inside the body 1 and finally exit from the light-emitting surface 9 with diffusion pattern at the front of the body 1 to achieve an efficient and uniform lighting effect.

[0023] Part of the light ray one 6 of the LED light source 4 is incident into the body 1, is reflected by the parabolic condenser surface 5 on the rear surface and reaches the upper surface of the transparent material structure. This part of the light does not meet the total reflection condition. Without the black material structure, the light will directly transmit through the upper surface of the transparent material structure, forming a secondary optical bright spot; through the absorption of the black material structure, the generation of the secondary optical bright spot is directly eliminated.

[0024] Part of the light rays of the LED light source 4, namely the light rays 8, reach the bottom structure of the main body 1 directly through the refraction of the horizontal light incident surface 2. This part of the light also does not meet the total reflection condition and will directly transmit out from the upper surface of the transparent material to form a secondary optical bright spot. After being absorbed by the black material structure, the generation of the secondary optical bright spot is directly eliminated.

[0025] The LED light source 4 is a Lambertian body that emits light at 120 degrees. In fact, there is still light outside the 120 degrees. Since this part of the light is large-angle light and is easily overlooked, but when the thick-walled part is in a suspended shape, this part of the light refracts and reflects at the air-to-medium surface, and the reflected light forms the primary LED bright spot seen by the observer. In order to eliminate the bright spot emitted by the LED light source, the top black material structure 3 in the main body 1 plays a great role. The top black material structure 3 is located outside the 120-degree light-emitting angle of the LED light source, such as Figure 5 shown. The starting position of the black material structure is at the end of the 120-degree line of the LED light source. Part of the light rays 7 of the LED light source 4 reach the top black material structure 3, and the part of the light rays 7 is large-angle light outside the 120-degree light emission of the LED light source 4 and is directly absorbed by the top black material structure, thereby eliminating the generation of the primary bright spot. The height of the black material is determined by the thickness of the LED, and it only needs to exceed the LED light-emitting center by 0.5 mm.

[0026] The material of the main body 1 is polymethyl methacrylate (i.e., PMMA).

[0027] The main body 1 can obtain an efficient and uniform lighting effect, and effectively solves the problem of optical bright spots that cannot be avoided in traditional thick-walled parts. No additional structural parts are required, saving a lot of space and cost.

Claims

1. A thick-walled part for eliminating bright spots of a thick-walled part, including a body (1), characterized in that: The body (1) is a two-color injection molded thick-walled part, the top is a black material structure (3), the bottom is a transparent material, the upper surface of the transparent material is a horizontal light incident surface (2), above the horizontal light incident surface (2) is an LED light source (4), the rear surface of the body (1) is a parabolic light collecting surface (5), and the front part of the body (1) is a light emitting surface (9) with diffusion patterns; Part of the light ray one (6) of the LED light source (4) is incident into the body (1), reflected by the parabolic light collecting surface (5) on the rear surface and reaches the black material structure (3) at the top, and is absorbed by the black material structure (3) at the top, eliminating the generation of secondary optical bright spots; The height of the black material structure (3) is determined by the thickness of the LED light source (4), and is 0.5 mm higher than the LED light emitting center; Part of the light ray three (8) of the LED light source (4) is incident into the body (1), directly reaches the bottom of the body (1), is reflected by the bottom and reaches the black material structure (3) at the top, and is absorbed by the black material structure (3) at the top, eliminating the generation of secondary optical bright spots; Part of the light ray two (7) of the LED light source (4) reaches the black material structure (3) at the top. The part of the light ray two (7) is a large-angle light ray outside the 120-degree light emission of the LED light source (4), and is directly absorbed by the black material structure (3) at the top, thereby eliminating the generation of primary bright spots.

2. The thick-walled part for eliminating bright spots of a thick-walled part according to claim 1, characterized in that: The number of the LED light sources (4) is at least one, and the color of the LED light source (4) is red or yellow or white.

3. The thick-walled part for eliminating bright spots of a thick-walled part according to claim 1, characterized in that: The black material structure (3) is fixed outside the 120-degree light emission angle of the LED light source (4), and the starting position of the black material structure (3) is at the end of the 120-degree line of the LED light source (4).

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