CN219867529U

CN219867529U - Automobile headlight projection system

Info

Publication number: CN219867529U
Application number: CN202321218921.6U
Authority: CN
Inventors: 岳德举; 饶钦和; 王智锋
Original assignee: Lianhui Intelligent Technology Zhongshan Co ltd
Current assignee: Lianhui Intelligent Technology Zhongshan Co ltd
Priority date: 2023-05-19
Filing date: 2023-05-19
Publication date: 2023-10-20
Anticipated expiration: 2033-05-19

Abstract

The utility model discloses an automobile headlight projection system, which comprises a light source module, a collimation assembly, a dodging assembly, a convergence assembly, a DMD imaging chip, an imaging lens group and a far-near light switching device which are sequentially arranged along the light direction; the light source module is a white light source, and the converging assembly sequentially comprises a first converging lens, a second converging lens and a light path conversion structure for converging and reversing light rays; the DMD imaging chip is connected with the automobile control chip and imaging is controlled by the automobile control chip. The utility model has the advantages of high resolution, capability of projecting various pictures, simple light path design and lower cost.

Description

Automobile headlight projection system

Technical Field

The utility model relates to the technical field of projection equipment, in particular to an automobile headlight projection system.

Background

Along with the development of intelligence, the intelligent demands of people on automobiles are also increasing, and the automobile headlight is not only required to be illuminated, but also hopes to present prompt expressions of some graphic languages and the like when encountering pedestrians or navigation.

The existing automobile headlights on the market adopt LED matrix pixel headlights, an LED lamp matrix array is used as pixels, and different patterns or marks are displayed by controlling different LEDs to be bright and dark through imaging of a lens module. The illumination projection system directly uses the LED array as a light source and a pixel, is limited by the size of the LED, has low resolution and is not fine in display pattern.

In addition, there are some automotive headlight projection systems (for example, CN 106439673 a) using laser light sources, and this projection system has the problems of high cost of the laser light source, complex light path, many components, for example, the need of using a color wheel, a DLP chip, etc. to convert the light source, and large volume.

The present utility model has been made based on such a situation.

Disclosure of Invention

The utility model aims to overcome the defects of the prior art and provide the automobile headlight projection system which has high resolution, can project various pictures, has simple light path design and lower cost.

The utility model is realized by the following technical scheme:

in order to solve the technical problems, the utility model provides an automobile headlight projection system, which comprises a light source module, a collimation assembly, a dodging assembly, a convergence assembly, a DMD imaging chip, an imaging lens group and a far-near light switching device which are sequentially arranged along the light direction; the light source module is a white light source, and the converging assembly sequentially comprises a first converging lens, a second converging lens and a light path conversion structure for converging and reversing light rays; the DMD imaging chip is connected with the automobile control chip and imaging is controlled by the automobile control chip.

In order to further solve the technical problem to be solved, the utility model provides an automobile headlight projection system, wherein the light path conversion structure sequentially comprises a reflector and a third converging lens.

In order to further solve the technical problem to be solved, the utility model provides an automobile headlight projection system, wherein the light path conversion structure comprises a reflector, and the reflector and a second converging lens are respectively arranged on two sides of the same surface of a DMD imaging chip.

In order to further solve the technical problem, the utility model provides an automobile headlight projection system, wherein the light path conversion structure comprises a TIR prism structure arranged right in front of a DMD imaging chip, the TIR prism structure comprises two triangular prisms which are spliced together, and an air gap is arranged between the two triangular prisms.

In order to further solve the technical problem to be solved, the utility model provides an automobile headlight projection system, wherein the light homogenizing component is a light pipe or a compound eye module.

In order to further solve the technical problem, the utility model provides an automotive headlight projection system, wherein the collimation assembly comprises one or more collimation lenses.

In order to further solve the technical problem to be solved, the utility model provides an automobile headlight projection system, wherein the far and near light switching device comprises a rotatable baffle plate and a drive thereof.

In order to further solve the technical problem to be solved, the utility model provides an automobile headlight projection system, wherein the imaging lens group comprises a plurality of imaging lenses.

Compared with the prior art, the utility model has the following advantages:

1. the light path of the utility model adopts white light as a light source, adopts the DMD imaging chip to modulate light to serve as pixels, the light source and the pixels are different, and the DMD imaging chip consists of hundreds of thousands or even millions of micromirrors, so that the automobile headlight projection system can project patterns with high resolution. In addition, the DMD imaging chip is connected with the automobile control chip, and the shape of the projected pattern can be controlled by the automobile control chip. The utility model is more intelligent, and the DMD imaging chip is combined with the automobile control chip, so that navigation, turning indication, sidewalk indication and the like can be realized.

2. Compared with a laser light source, the white light source adopted by the utility model has lower cost, and the structure such as a color wheel and the like is not required to be arranged in the light path to convert the color of light.

3. The convergence component adopts a first convergence lens, a second convergence lens and an optical path conversion structure, wherein the optical path conversion structure can be a lens and a reflector, a reflector or a TIR prism structure. The convergence component can converge and reflect the light of the light source for many times so as to well focus the light on the DMD imaging chip, the light can be fully utilized, and the light path volume is smaller.

Drawings

The utility model is described in further detail below with reference to the attached drawing figures, wherein:

FIG. 1 is a schematic diagram of an embodiment of the present utility model;

FIG. 2 is a schematic diagram of a second embodiment of the present utility model;

FIG. 3 is a schematic diagram of a third principle of the embodiment of the present utility model;

FIG. 4 is a schematic structural view of a TIR prism structure;

FIG. 5 is a schematic diagram of a compound eye module;

fig. 6 is a schematic diagram of a compound eye module.

Detailed Description

In order to make the technical scheme of the present utility model better understood by those skilled in the art, the present utility model will be further described in detail with reference to the accompanying drawings and the detailed description.

An automotive headlamp projection system as shown in fig. 1 to 6 comprises a light source module 1, a collimation assembly 2, a dodging assembly 3, a convergence assembly 4, a DMD imaging chip 5, an imaging lens group 6 and a far and near light switching device 7 which are sequentially arranged along the light direction. The white light source generated by the light source module 1 sequentially passes through collimation of the collimation component 2, light homogenization of the light homogenization component 3 and convergence of the convergence component 4 to reach the DMD imaging chip 5; the DMD imaging chip 5 can perform light and signal processing, and can modulate incident light into light and images; finally, the imaging lens group 6 projects the light and the image modulated by the DMD imaging chip 5 to irradiate the road surface for night illumination or displaying the required image. The high beam and low beam switching device 7 is used for switching the high beam and the low beam.

The light path of the utility model adopts white light as a light source, the DMD imaging chip 5 is adopted to modulate light to serve as pixels, the light source and the pixels are different, and the DMD imaging chip 5 consists of hundreds of thousands or even millions of micromirrors, so that the automobile headlight projection system can project patterns with high resolution.

In addition, the DMD imaging chip 5 is connected with an automobile control chip, and the shape of the projected pattern can be controlled by the automobile control chip. The utility model is more intelligent, and the DMD imaging chip 5 is combined with the automobile control chip, so that navigation, turning indication, sidewalk indication and the like can be realized.

Further, the light source module 1 is a white light source, that is, the light source module 1 is usually a white light source such as a white LED or a halogen lamp. Compared with a laser light source, the white light source adopted by the utility model has lower cost, and the structure such as a color wheel and the like is not required to be arranged in the light path to convert the color of light.

Furthermore, the light source module 1 may be a white light source or a plurality of parallel white light sources.

More specifically, the light homogenizing component 3 is a light pipe 31 or a compound eye module 32. The light guide 31 or the compound eye module 32 has the function of light homogenizing, and can be replaced with each other. As shown in fig. 1-3, the light guide 31 is adopted in the light path, as shown in fig. 5 and 6, the compound eye module 32 is provided with array lenses on both sides of the compound eye module 32, and the base material of the compound eye module 32 can be glass or resin.

More specifically, the collimation assembly 2 comprises at least one collimation lens 21. The collimator lens 21 is preferably a convex lens. The collimating component 2 may be one collimating lens 21, or may be a collimating lens group formed by a plurality of collimating lenses 21.

More specifically, the high-low beam switching device 7 includes a rotatable shutter 71 and its drive. The drive is preferably an electric motor. The baffle 71 can rotate within a certain angle range to shield light at different positions, thereby realizing switching between far and near light.

More specifically, the imaging lens group 6 includes a plurality of imaging lenses 61, that is, the imaging lens group 6 is a lens group composed of a plurality of lenses, mainly for imaging.

Several specific embodiments of convergence assembly 4 are described in detail below:

embodiment one:

as shown in fig. 1, there is a first embodiment of the present utility model in which: the converging assembly 4 comprises, in order, a first converging lens 41, a second converging lens 42, and an optical path switching structure 43 for converging and reversing the light rays. The optical path conversion structure 43 includes a reflective mirror 431 and a third converging lens 432 in this order. The light from the light homogenizing component 3 is relatively uniform, and the uniform light sequentially passes through the first converging lens 41, the second converging lens 42, the reflecting mirror 431 and the third converging lens 432 to converge and reflect for multiple times, so that the light is focused on the DMD imaging chip 5, and the light is fully utilized.

Embodiment two:

as shown in fig. 2, a second embodiment of the present utility model is different from the first embodiment in that, in this embodiment: the light path conversion structure 43 includes a reflector 433, and the reflector 433 and the second converging lens 42 are arranged on two sides of the same surface of the DMD imaging chip 5. In the embodiment, the reflector 433 replaces the reflector 431 and the third converging lens 432, so that the parts are fewer, the light path volume can be effectively reduced, and flattening and high efficiency are realized.

Embodiment III:

as shown in fig. 3, an embodiment of the present utility model is a third embodiment, which differs from the first embodiment in that in this embodiment: the light path conversion structure 43 includes a TIR prism structure disposed directly in front of the DMD imaging chip 5, the TIR prism structure includes two triangular prisms 434 that are spliced together, and an air gap is provided between the two triangular prisms 434. I.e., light rays are incident from the first triangular prism 434 and reach the interface of the first triangular prism 434 and the second triangular prism 434. An air gap is formed between the first triangular prism 434 and the second triangular prism 434, and incident light reaches a total internal reflection condition on the surface of the first triangular prism 434, is not transmitted from the prism, but is reflected to the DMD imaging chip 5, and after being reflected by the DMD imaging chip 5, passes through the first triangular prism 434 and the second triangular prism 434 in sequence, and finally exits. The light path structure is incident to the DMD imaging chip 5 and is a circle center light path, so that the brightness uniformity is good, and the resolution is improved.

It is to be understood that the above examples of the present utility model are provided for clarity of illustration only and are not limiting of the embodiments of the present utility model. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the utility model are desired to be protected by the following claims.

Claims

1. An automotive headlamp projection system, characterized by: the device comprises a light source module (1), a collimation assembly (2), a dodging assembly (3), a convergence assembly (4), a DMD imaging chip (5), an imaging lens group (6) and a far-near light switching device (7) which are sequentially arranged along the light direction; the light source module (1) is a white light source, and the convergence assembly (4) sequentially comprises a first convergence lens (41), a second convergence lens (42) and a light path conversion structure (43) for converging and reversing light rays; the DMD imaging chip (5) is connected with the automobile control chip and is used for controlling imaging.

2. An automotive headlamp projection system according to claim 1, wherein: the light path conversion structure (43) sequentially comprises a reflecting mirror (431) and a third converging lens (432).

3. An automotive headlamp projection system according to claim 1, wherein: the light path conversion structure (43) comprises a reflector (433), and the reflector (433) and the second converging lens (42) are arranged on two sides of the same surface of the DMD imaging chip (5) in a separated mode.

4. An automotive headlamp projection system according to claim 1, wherein: the light path conversion structure (43) comprises a TIR prism structure arranged right in front of the DMD imaging chip (5), the TIR prism structure comprises two triangular prisms (434) which are spliced together, and an air gap is reserved between the two triangular prisms (434).

5. An automotive headlamp projection system according to any one of claims 1-4, wherein: the light homogenizing component (3) is a light pipe (31) or a compound eye module (32).

6. An automotive headlamp projection system according to any one of claims 1-4, wherein: the collimation assembly (2) comprises one or more collimation lenses (21).

7. An automotive headlamp projection system according to any one of claims 1-4, wherein: the high-low beam switching device (7) comprises a rotatable baffle (71) and a drive thereof.

8. An automotive headlamp projection system according to any one of claims 1-4, wherein: the imaging lens group (6) comprises a plurality of imaging lenses (61).