CN110736075A - A car signal lamp with a focal length gradient reflection optical system - Google Patents

Abstract

The invention provides an automobile signal lamp with a focal length gradient reflection optical system, comprising at least one LED light source, a reflection system, an inner lens and an outer lens, the LED light source is arranged at the focal point of the reflection system, and the The inner lens is arranged in front of the reflection system, the outer lens is arranged in front of the inner lens, the LED light source emits light, reflected by the reflection system, transmitted through the inner lens, and finally transmitted through the outer lens. A sub-reflector is composed of strip-shaped parabolic sub-reflectors with different focal lengths and gradually changing, the focal length of the strip-shaped parabolic sub-reflector is from small to large or from large to small, and its focal length changes The trend is to minimize the stepped sub-surface area between every two parabolic sub-mirrors. The lighting effect of the reflective optical system car signal lights, especially in the side view angle, is optimized, and the overall lighting uniformity of the signal lights is improved.

Description

A car signal lamp with a focal length gradient reflection optical system

technical field

The invention relates to the field of automobile tail lamps, in particular to an automobile signal lamp with a focal length gradient reflection optical system.

Background technique

With the continuous improvement of consumers' requirements for automobile modeling innovation, the modeling of automobile signal lamp products has also changed with each passing day. The designer must consider improving the lighting effect of each function while meeting the regulatory requirements of each function of the signal light, so as to achieve the design of products with pleasing quality and excellent visual effect while matching the shape.

As we all know, LED light sources are widely used. Its advantages include energy saving, environmental protection, long life, shock resistance, safety, small size, flexible application, convenient working method, easy to match with compact and flexible design, and so on. It is still the current mainstream light source product.

Generally, the side wall of the reflector of the car signal lamp of the reflective optical system, that is, the step surface, is likely to form a dark area at the outer viewing angle when it is lit, and the uniformity of the lighting effect is poor. And to some extent, the size of the step surface directly determines the size of the dark area when it is lit. That is, the smaller the step surface, the smaller the dark area.

The technical solution described in the background patent "CN1401935A", the uniformity of the lighting effect of the side viewing angle is poor. The reason is that the stepped surface of the side viewing angle will cause a dark area to light up, and the dark area is obvious, which is easily subject to customers and consumers. Complaining is incompatible with the consumer demand for more beautiful and pleasing signal lights. The problems in this patent are generally found in general reflective optical system automotive signal lights, especially when illuminated from a side angle of view.

SUMMARY OF THE INVENTION

In order to solve the above problems, the purpose of the present invention is to provide an automobile signal lamp with a focal length gradient reflection optical system. The focal length changes from small to large or from large to small, and its focal length change trend minimizes the area of the stepped sub-surface between every two parabolic sub-reflectors, so the reflective optical system is optimized. The lighting effect improves the overall lighting uniformity of the signal lamp, and solves the problem of forming a dark area in the outer viewing angle when the ordinary reflector is lit.

The invention provides an automobile signal lamp with a focal length gradient reflection optical system, comprising at least one LED light source, a reflection system, an inner lens and an outer lens, the LED light source is arranged at the focal point of the reflection system, and the The inner lens is arranged in front of the reflection system, the outer lens is arranged in front of the inner lens, the LED light source emits light, reflected by the reflection system, then transmitted through the inner lens, and finally transmitted through the outer lens. A sub-reflector is composed of strip-shaped parabolic sub-reflectors with different focal lengths and gradually changing, the focal length of the strip-shaped parabolic sub-reflector is from small to large or from large to small, and its focal length changes The trend is to minimize the stepped sub-surface area between every two parabolic sub-mirrors. And the top of the strip-shaped parabolic sub-mirror at the front of the latter sub-mirror is connected with the top of the strip-shaped parabolic sub-mirror at the rear of the former sub-mirror, so that the distance between every two parabolic sub-mirrors is Minimize the sub-surface area of the steps between.

A further improvement is that: the reflection system is a mirror reflection optical system or a thick-walled reflection optical system.

A further improvement is that: the change increment of the focal length of the strip-shaped parabolic sub-reflector is fixed or gradually increased, and the increasing manner may be arbitrary, or may conform to a certain formula or algorithm.

A further improvement is that: when the reflection system is a thick-walled reflective optical system, the thick-walled material is plexiglass material or PC material.

A further improvement is that: the material of the reflection system is one of PC, PMMA or ABS, and the color of the material is not limited, it can be a white material reflection system, a red material reflection system, etc., the reflection system is aluminized, and Skin texture is added to further increase overall uniformity. The material of the reflector can also be a white PC material with a skin pattern.

A further improvement is that: the material of the inner lens is PC or PMMA, and the front side or the back side or both sides of the inner lens are provided with dermatoglyphics. It can also be a scattering material, and the color is not limited. It can also be a volume scattering material and the color is not limited.

A further improvement is that the focal length of the reflection system can vary from 1 mm to 50 mm.

Beneficial effects of the present invention: Since the sub-reflectors are composed of strip-shaped parabolic sub-reflectors with different focal lengths and gradually changing, the focal length of the strip-shaped parabolic sub-reflectors is from small to large or from large to small, and the focal length variation trend makes each The area of the stepped sub-surface between the two parabolic sub-reflectors is minimized, thus optimizing the lighting effect of the reflective optical system automobile signal lights, especially in the side viewing angle, improving the overall lighting uniformity of the signal lights, and solving the problem of ordinary reflection. The problem of forming dark areas from the outside viewing angle when the mirror is lit.

Description of drawings

FIG. 1 is a schematic diagram of an automobile signal lamp of the focal length gradient reflection optical system of the present invention.

FIG. 2 is a schematic structural diagram of an automobile signal lamp of the focal length gradient reflection optical system of the present invention.

FIG. 3 is a schematic diagram of a car signal lamp of a common mirror reflection optical system.

FIG. 4 is a schematic diagram of an automobile signal lamp of the focal length gradient mirror reflective optical system according to the first embodiment of the present invention.

FIG. 5 is a schematic diagram of an automobile signal lamp of the focal length gradient thick-walled member reflective optical system according to the second embodiment of the present invention.

FIG. 6 is a lighting effect diagram of Embodiment 1 and Embodiment 2 of the present invention.

Among them: 1-LED light source, 2-reflection system, 3-inner lens, 4-outer lens.

Detailed ways

In order to deepen the understanding of the present invention, the present invention will be described in further detail below with reference to the embodiments, which are only used to explain the present invention and do not constitute a limitation on the protection scope of the present invention.

Example 1

Figure 4 shows a car signal light with a focal length gradient reflector reflective optical system. The optical system includes nine LED light sources (LED1, LED2, LED3, LED4, LED5, LED6, LED7, LED8, LED9) and reflection system 2. The light is emitted by nine LED light sources (LED1, …, LED9) and reflected by the reflection system 2. The reflection system 2 includes nine sub-reflectors (2a, 2b, 2c, 2d, 2e, 2f, 2g, 2h, 2i). Each sub-mirror consists of a strip-shaped paraboloid with different focal lengths (focal lengths f1, f2, f3, f4, f5) and gradually changing (f1=10mm, f2 = 11mm, f3=12mm, f4 = 13mm, f5 = 14mm) Mirror composition. And the top of the strip-shaped parabolic sub-mirror at the front of the latter sub-mirror is connected with the top of the strip-shaped parabolic sub-mirror at the rear of the former sub-mirror, so that the distance between every two parabolic sub-mirrors is The area of the step subfaces (A, B, C, D, E, F, G, H) between them is minimized. The inevitable problem of this system is that there may be a small dark area. In this case, the dark area can be completely eliminated by adding an inner lens and adding dermatoglyphics on the inner lens. The lighting effect uniformity can be further optimized.

Embodiment 2

As shown in FIG. 5 , this embodiment provides an automobile signal lamp with a reflective optical system of a focal length gradient thick-walled member. The optical system of the car signal light of the focal length gradient thick-walled reflection optical system includes nine LED light sources (LED1, LED2, LED3, LED4, LED5, LED6, LED7, LED8, LED9) and a reflection system 2. The light is emitted by nine LED light sources (LED1, ..., LED9), after entering the incident surface of the thick-walled part, it is totally reflected by the 2-wave front of the thick-walled part reflection system, and exits through the exit surface of the thick-walled part. The thick-walled reflection system 2 includes nine sub-thickness reflection surfaces (2a, 2b, 2c, 2d, 2e, 2f, 2g, 2h, 2i). Each sub-mirror has different focal lengths (focal lengths f1, f2, f3, f4, f5) and gradually changes (f1=3.5mm, f2 = 3.6mm, f3=3.8mm, f4 = 4.1mm, f5 = 4.5mm) of strip parabolic sub-mirrors. And the top of the strip-shaped parabolic sub-reflector at the front of the latter sub-mirror is connected with the top of the strip-shaped parabolic sub-reflector at the rear of the former sub-mirror, so that the distance between every two parabolic sub-reflectors is The area of the step subfaces (A, B, C, D, E, F, G, H) between them is minimized. The inevitable problem of this system is that there may be a small dark area. In this case, the dark area can be completely eliminated by adding an inner lens and adding dermatoglyphics on the inner lens. The lighting effect uniformity can be further optimized.

Claims (7)

1. The automobile signal lamp with the focal length gradually-changing reflection type optical system is characterized by comprising at least LED light sources (1), a reflection system (2), an inner lens (3) and an outer lens (4), wherein the LED light sources (1) are arranged at the focus of the reflection system (2), the inner lens (3) is arranged in front of the reflection system (2), the outer lens (4) is arranged in front of the inner lens (3), the LED light sources (1) emit light, the light is reflected by the reflection system (2), then is transmitted by the inner lens (3), and finally is transmitted and emitted by the outer lens (4), the reflection system (2) is composed of at least sub-reflectors, each sub-reflector is composed of strip parabolic sub-reflectors with different and gradually-changed focal lengths, the focal lengths of the strip parabolic sub-reflectors are changed from small to large, and the change trend of the focal lengths of the strip parabolic sub-reflectors minimizes the area of a step between every two parabolic sub-reflectors.
2. 2. The signal lamp with gradually-varying focal length reflective optical system as claimed in claim 1, wherein the reflective system (2) is a reflective mirror system or a thick-walled reflective optical system.
3. 3. The signal lamp with gradually varying focal length reflective optical system as claimed in claim 1, wherein the increment of variation of the focal length of the strip-shaped parabolic sub-reflectors is fixed or gradually increased.
4. 4. The signal lamp with gradually-varying focal length reflective optical system as claimed in claim 2, wherein the reflective system (2) is a thick-walled reflective optical system made of plexiglass or PC.
5. 5. The signal lamp with gradually-changed focal length reflective optical system as claimed in claim 2, wherein the reflective system (2) is made of materials selected from PC, PMMA or ABS, and the reflective system (2) is plated with aluminum and added with dermatoglyph.
6. 6. The automobile signal lamp with gradually-changed focal length reflective optical system as claimed in claim 1, wherein the inner lens (3) is made of PC or PMMA with dermatoglyph on its front or back or both.
7. 7. The automotive signal lamp with a gradually focusing and reflecting optical system as claimed in any one of claims 2, 4 or 5 and , wherein the focal length of the reflecting system (2) varies from 1mm to 50 mm.

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