CN114675479B

CN114675479B - Light guide, projection system, vehicle lamp, vehicle, optical system and operation method thereof

Info

Publication number: CN114675479B
Application number: CN202011546749.8A
Authority: CN
Inventors: 桑鹏鹏; 张恩鑫; 樊坚; 潘红响; 王佩瑶; 聂艳斌; 郎海涛; 杨佳
Original assignee: Ningbo Sunny Automotive Optech Co Ltd
Current assignee: Ningbo Sunny Automotive Optech Co Ltd
Priority date: 2020-12-24
Filing date: 2020-12-24
Publication date: 2024-06-14
Anticipated expiration: 2040-12-24
Also published as: CN114675479A

Abstract

The application relates to the technical field of optical transmission, in particular to a light guide, a projection system, a car lamp, a car, an optical system and an operation method thereof; a light guide for placement in a light passing region of an optical system, the light guide comprising: the light-transmitting port is used for enabling light rays of the first light source to pass through the light guide; the light incident surface is used for receiving the light of the second light source so as to enable the light to be incident into the light guide; the reflecting surface is used for reflecting the light rays which are emitted into the light guide from the light incident surface; the light emitting surface is used for enabling the light rays reflected by the reflecting surface to pass through the light guide to continue to transmit in the light transmitting area; thereby leading the light of the second light source into the light-transmitting area, and increasing the light-emitting range of the light-transmitting area of the optical system.

Description

Light guide, projection system, vehicle lamp, vehicle, optical system and operation method thereof

Technical Field

The application relates to the technical field of optical transmission, in particular to a light guide, a projection system, a car lamp, a car, an optical system and an operation method thereof.

Background

Automobiles are one of the important vehicles in today's society. With the advancement of technology, requirements of intellectualization, automation, safety and the like of automobiles are also increasing, for example, research on adaptive high Beam (ADB) systems is performed. The ADB system can automatically start or withdraw the far-reaching beam for a driver according to the running state, the environment state and the road vehicle state of the vehicle, or adaptively change the far-reaching beam according to the vehicle position in the front visual field of the vehicle, so that glaring is avoided, the use is more convenient and comfortable, and the visual field illumination is enlarged on the basis of ensuring the running safety of the road.

With the development of the automotive lighting technology, the automotive headlamp is developed from the traditional lighting to the pixel headlamp with both the ADB function and the ground projection function. On the one hand, the ADB function can be performed during night driving. On the other hand, different marks can be projected in front of the automobile to play the purpose of human-automobile interaction. One of the implementations of the pixel headlight is to use a multi-LED integrated pixel chip as an image source and to project an image by means of a lens assembly.

However, as the requirements of people on the flattened appearance of the car lamp are more and more, when the conventional pixel headlight is used, the brightness range of the light emitting surface is small, and then a great hidden danger is left for traffic safety.

Disclosure of Invention

The application mainly aims to provide a light guide with a large light emitting range, a projection system, a car lamp, a car, an optical system and an operation method thereof.

An embodiment of the present application provides a light guide for being placed in a light-transmitting region of an optical system, the light guide including:

the light-transmitting port is used for allowing light rays of the first light source to pass through the light guide;

the light incident surface is used for receiving the light of the second light source so as to enable the light to be incident into the light guide;

the reflecting surface is used for reflecting the light rays which are emitted into the light guide by the light incident surface; and

And the light emitting surface is used for enabling the light rays reflected by the reflecting surface to pass through the light guide to continue to transmit in the light transmitting area.

In one embodiment, the second light source is formed by light rays of the first light source located at the edge of the light passing area, and the light incident surface is located on the inner peripheral edge of the light passing opening.

In one embodiment, the light incident surface is annular.

In one embodiment, the second light source is a light source independent of the first light source, the light incident surface is disposed on an outer edge of the light guide, and the second light source is disposed opposite to the light incident surface.

In one embodiment, the number of the light incident surfaces is two, the two light incident surfaces are respectively arranged on two side edges of the light guide, and the number of the second light sources corresponds to the number of the light incident surfaces.

In one embodiment, the cross section of the light incident surface is arc-shaped, sawtooth-shaped or array arc-shaped.

In one embodiment, the light incident surface is provided with a first pattern or a second pattern.

In one embodiment, the second light source comprises a first light unit and at least one second light unit, the first light unit is composed of light rays of which the first light source is positioned at the edge of the light passing area, and the second light unit is a light source independent of the first light source;

the light incident surface comprises a first light incident surface and a second light incident surface, the first light incident surface is arranged on the inner peripheral edge of the light passing opening, the second light incident surface is arranged on the outer side edge of the light guide, and the second light unit and the second light incident surface are oppositely arranged.

In one embodiment, the first light incident surface is annular, the number of the second light incident surfaces is two, the two second light incident surfaces are respectively arranged on two side edges of the light guide, and the number of the second light units corresponds to the number of the second light incident surfaces.

In one embodiment, the cross sections of the first light incident surface and the second light incident surface are respectively arc-shaped, zigzag-shaped or array arc-shaped.

In one embodiment, the first light incident surface and the second light incident surface are respectively provided with a first pattern or a second pattern.

In one embodiment, the reflective surface is stepped, saw tooth or wave shaped.

In one embodiment, the light emitting surface is a scale type.

In one embodiment, the light rays which are not totally reflected on the reflecting surface pass out of the light guide from the light emitting surface.

In one embodiment, the reflective surface is for totally reflecting light, and the light exit surface is for totally reflecting light and directing light out of the light guide.

In one embodiment, light rays meeting the total reflection condition are capable of total reflection transmission between the reflective surface and the light-emitting surface.

An embodiment of the present application also provides an optical system including:

the lens assembly is internally provided with a light transmission area;

The light guide device according to any one of the embodiments, wherein the light guide device is disposed in the light-transmitting region;

The light of the first light source passes through the light guide device from the light-passing port and is transmitted in the light-passing area; and

The light of the second light source is emitted into the light guide from the light incident surface, reflected to the light emergent surface by the reflecting surface, and then passes out of the light guide from the light emergent surface so as to be continuously transmitted in the light passing area.

In one embodiment, the lens assembly includes a first optic positioned between the first light source and the light guide;

the edge of one side of the first lens opposite to the light guide corresponds to the light incident surface.

In one embodiment, the lens assembly further comprises a second optic disposed on a side of the light guide remote from the first optic;

the second lens is arranged opposite to the light emitting surface of the light guide, and the size and the shape of the projection of the light emitting surface on the plane where the second lens is positioned correspond to the size and the shape of the second lens respectively.

An embodiment of the present application further provides a projection system, including the optical system according to any one of the embodiments, where the first light source includes an image generating unit, and the image generating unit is DMD, MEMS, LCOS or an array LED chip.

An embodiment of the present application further provides a vehicle lamp, including the optical system according to any one of the embodiments, where the first light source is an LED.

An embodiment of the present application further provides a vehicle lamp, including the projection system according to any one of the embodiments.

The embodiment of the application also provides a vehicle, which comprises the vehicle lamp in any embodiment.

An embodiment of the present application further provides a method for operating an optical system, where the optical system is the optical system according to any one of the above embodiments, and the method includes:

The light rays of the first light source pass through the light guide from the light-passing port and are transmitted in the light-passing area;

The light of the second light source is emitted into the light guide from the light incident surface, reflected to the light emergent surface from the reflecting surface, and then passes out of the light guide from the light emergent surface so as to be continuously transmitted in the light passing area.

In one embodiment of the optical system operation method, the second light source is composed of light rays of the first light source located at the edge of the light passing area, and the light incident surface is located on the inner peripheral edge of the light passing opening.

In one embodiment of the optical system operation method, the second light source is a light source independent of the first light source, the light incident surface is disposed on an outer edge of the light guide, and the second light source is disposed opposite to the light incident surface.

The light guide device provided by the application comprises a light-passing opening, a light-in surface, a reflecting surface and a light-out surface, wherein the light-passing opening is used for allowing light rays of a first light source to pass through the light guide device, the light-in surface is used for receiving light rays of a second light source so as to enable the light rays to be emitted into the light guide device, the reflecting surface is used for reflecting the light rays emitted into the light guide device from the light-in surface, and the light-out surface is used for allowing the light rays reflected by the reflecting surface to pass through the light guide device so as to continue to be transmitted in a light-passing area, so that the light rays of the second light source are guided into the light-passing area, and the light-out range of the light-passing area of the optical system is increased.

Drawings

The advantages of the foregoing and/or additional aspects of the present invention will become apparent and readily appreciated from the description of the embodiments, taken in conjunction with the accompanying drawings, wherein:

FIG. 1 is a perspective view of an optical system according to an embodiment of the present application;

FIG. 2 is a top view of an optical system according to an embodiment of the present application;

FIG. 3 is a schematic perspective view of the light guide shown in FIG. 2;

Fig. 4 is a schematic perspective view of another view of the light guide shown in fig. 2

FIG. 5 is a schematic diagram illustrating a light guide of an optical system according to an embodiment of the present application;

FIG. 6 is a cross-sectional view of a light incident surface of a light guide according to an embodiment of the present application;

FIG. 7 is a cross-sectional view of a light incident surface of a light guide according to an embodiment of the present application;

FIG. 8 is a cross-sectional view of a light incident surface of a light guide according to an embodiment of the present application;

FIG. 9 is a flow chart of a method for operating an optical system according to an embodiment of the application;

FIG. 10 is a schematic diagram of a light guide according to an embodiment of the present application;

FIG. 11 is a top view of an optical system according to an embodiment of the present application;

FIG. 12 is a schematic view of a light guide of an optical system according to an embodiment of the present application;

FIG. 13 is a cross-sectional view of a light incident surface of a light guide according to an embodiment of the present application;

FIG. 14 is a cross-sectional view of a light incident surface of a light guide according to another embodiment of the present application;

FIG. 15 is a cross-sectional view of a light incident surface of a light guide according to another embodiment of the present application;

FIG. 16 is a schematic diagram of a light guide according to an embodiment of the present application;

Fig. 17 is a top view of an optical system according to an embodiment of the present application.

The correspondence between the reference numerals and the component names in fig. 1 to 17 is:

10. A light guide; 11. a light-transmitting port; 12. a light incident surface; 121. a first pattern; 122. a second texture; 13. a reflecting surface; 14. a light-emitting surface; 15. a light incident surface; 16. a light incident surface; 161. a first light incident surface; 162. a second light incident surface; 20. a light-transmitting region; 30. a first light source; 40. a second light source; 50. a lens assembly; 51. a first lens; 52. a second lens; 80. a second light source; 90. a second light source; 91. a first light unit; 92. and a second light unit.

Detailed Description

In order that the above-recited objects, features and advantages of the present application will be more clearly understood, a more particular description of the application will be rendered by reference to the appended drawings and appended detailed description. It should be noted that, without conflict, the embodiments of the present application and features in the embodiments may be combined with each other.

It is pointed out that the embodiments shown in the drawings are only for the purpose of illustrating and explaining the inventive concept in detail and image, which are not necessarily drawn to scale in terms of size and structure nor are they to be construed as limiting the inventive concept. In the drawings, light rays are represented by solid lines to clearly illustrate the proposed technical solution.

The optical system on a vehicle lamp in the prior art comprises a light source and a lens assembly, and the light source provides light for the lens assembly. The lens assembly comprises a plurality of lenses, and light rays emitted by the light source sequentially pass through the lenses, are amplified and optimized through the lenses, and are imaged at a distance. While the transmission of light between the plurality of lenses creates a light passing region within the lens assembly.

In the prior art, the light rays emitted from the edge of the lens (i.e. the light rays located at the edge of the light passing area 20) are weak or divergent, and often cannot be well transmitted to the next lens, so that light loss is caused, and finally, the light emitting range of the optical system is small.

Based on the above technical problems, the present application provides a light guide, a projection system, a vehicle lamp, a vehicle, an optical system and an operation method thereof, and the detailed description thereof is given below by specific embodiments.

Example 1

Fig. 1 is a perspective view of an optical system according to an embodiment of the present application, fig. 2 is a top view of the optical system shown in fig. 1, fig. 3 is a schematic perspective view of the light guide shown in fig. 1, and fig. 4 is a schematic perspective view of another view of the light guide shown in fig. 1.

As shown in fig. 1 to 4, the present embodiment provides a light guide 10 for being placed in a light-passing region 20 of an optical system. The light guide includes:

A light-passing port 11 for passing the light of the first light source 30 through the light guide 10;

The light incident surface 12 is configured to receive the light of the second light source 40 and make the light of the second light source 40 enter the light guide 10;

a reflection surface 13 for reflecting the light incident into the light guide 10 from the light incident surface 12; and

The light emitting surface 14 is used for transmitting the light reflected by the reflecting surface 13 out of the light guide 10 to continue to transmit in the light transmitting area 20.

The light guide 10 provided in this embodiment includes a light-passing opening 11, a light-entering surface 12, a reflecting surface 13 and a light-exiting surface 14, wherein the light-passing opening 11 is used for allowing light of the first light source 30 to pass through the light guide 10, the light-entering surface 12 is used for receiving light of the second light source 40 so as to make the light enter the light guide 10, the reflecting surface 13 is used for reflecting light entering the light guide 10 from the light-entering surface 12, and the light-exiting surface 14 is used for allowing the light reflected by the reflecting surface 13 to pass through the light guide 10 so as to continue to be transmitted in the light-passing area 20, thereby guiding the light of the second light source 40 into the light-passing area 20 and increasing the light-exiting range of the light-passing area 20.

Specifically, as shown in fig. 3 and 4, the light guide 10 provided in this embodiment is substantially funnel-shaped with two open ends, and the light-transmitting opening 11 is opened at one small open end. The first light source 30 is disposed opposite to the light-transmitting port 11 side of the light guide 10. The reflecting surface 13 is located on the outer peripheral surface of the funnel, and the light emitting surface 14 is located on the inner peripheral surface of the funnel.

As shown in fig. 2 and 3, the second light source 40 is composed of light rays of the first light source 30 located at the edge of the light passing region 20, and the light incident surface 12 is provided on the inner peripheral edge of the light passing opening 11. Specifically, the light beam that is not totally reflected on the reflection surface 13 passes through the light guide 10 from the light exit surface 14.

Fig. 5 is a schematic light guiding diagram of a light guide of an optical system according to an embodiment of the application.

As shown in fig. 2 and 5, the light of the first light source 30 located in the non-edge region of the light-passing region 20 passes through the light guide 10 from the light-passing port 11 to continue to be transmitted in the light-passing region 20. Light rays of the first light source 30 located at the edge of the light passing region 20 enter the light guide 10 from the light entering surface 12. After the light enters the light guide 10, the light meeting the condition of total reflection on the reflecting surface 13 and/or the light-emitting surface 14 is transmitted in a total reflection way on the reflecting surface 13 and/or the light-emitting surface 14, and the light not meeting the condition of total reflection on the reflecting surface 13 and/or the light-emitting surface 14 passes out of the light guide 10 from the light-emitting surface 14 to continue to be transmitted in the light-transmitting area 20. Specifically, when the included angle θ between the light ray and the perpendicular to the reflecting surface 13 or the light emitting surface 14 is equal to or greater than arcsin (n) (n is the refractive index of the optical/optical dense medium), total reflection occurs.

The light guide provided in this embodiment guides light into the light guide 10, the light meeting the total reflection condition can be transmitted between the reflecting surface 13 and the light emitting surface 14 by matching the reflecting surface 13 and the light emitting surface 14 in the light guide 10, and the light not meeting the total reflection condition is emitted from the light emitting surface 14, because the light guide 10 is approximately funnel-shaped, the light emitting surface 14 of the light guide 10 gradually increases radially outwards, and the light is emitted from the light emitting surface 14 after being totally reflected several times between the reflecting surface 13 and the light emitting surface 14, thereby achieving the purpose of increasing the light emitting range, that is, the light guide 10 increases the light emitting range by the function of transmitting light.

The size of the light-transmitting opening 11 corresponds to the size of the light-transmitting area 20 of the light path before the light guide 10, and the size of the light-emitting surface 14 corresponds to the size of the light-transmitting area 20 of the light path behind the light guide 10, i.e. the radiation range of the light-emitting surface 14 corresponds to the light-emitting range of the optical system.

In this embodiment, as shown in fig. 3 and 4, the light-transmitting port 11 is arranged in the middle of the light guide 10 and is circular, so that the light-transmitting effect and the light-guiding effect are good. In other embodiments, it will be apparent to those skilled in the art that other positions where the light-transmitting port 11 is opened in the light guide 10 are also within the scope of the present application. And in other embodiments, the light-transmitting opening 11 may be elliptical, rectangular or other irregular shape, which is not specifically limited herein.

The light incident surface 12 of the light guide 10 provided in this embodiment is disposed on the inner peripheral edge of the light passing opening 11, so as to be used for receiving the light ray of the first light source 30 located at the edge of the light passing area 20, guiding the light ray of the first light source 30 located at the edge of the light passing area 20 into the light guide 10, and guiding the light ray into the light passing area 20 after reflection so as to continue to transmit in the light passing area 20.

Fig. 6 to 8 are cross-sectional views of a light incident surface of a light guide according to an embodiment of the application.

Further, the cross section of the light incident surface 12 is arc-shaped (as shown in fig. 6), zigzag-shaped (as shown in fig. 7) or array arc-shaped (as shown in fig. 8), so as to increase the effect of receiving light by the light incident surface 12, thereby increasing the light emitting range of the whole optical system. Specifically, the cross section of the light incident surface 12 may be made to be circular arc, saw tooth or array circular arc by forming a plurality of grooves on the light incident surface 12.

The light incident surface 12 is provided with a first stripe 121 (as shown in fig. 7) or a second stripe 122 (as shown in fig. 8), and the inclination angles of the first stripe 121 and the second stripe 122 are different. In this embodiment, the first grooves 121 are transverse grooves and the second grooves 122 are vertical grooves.

In summary, the cross section of the light incident surface 12 is in a circular arc shape, a zigzag shape or an array circular arc shape, and the microstructure arrangement of the first grains or the second grains is arranged on the light incident surface 12, so that the incident light is homogenized, the light uniformly comprises the light at all angles, and finally the outgoing light beam of the light guide 10 is better uniform. The cross section of the light incident surface 12 is set to be arc-shaped or saw-tooth-shaped, the number of reflection times on the reflecting surface 13 is increased under the same input light energy, the reflecting area is enlarged, the uniformity is improved, and the volume can be reduced.

Further, the number of microstructures within 1mm of the microstructure density of the light incident surface 12 and the reflecting surface 13 is not less than 5, so that the total reflection times on the reflecting surface 13 is increased, and the light is more uniform.

As shown in fig. 3, the reflecting surface 13 is of a step type, a zigzag type or a wave type, so that the total reflection effect is good, that is, the light guide effect of the light guide 10 is better, that is, the reflecting times can be increased by setting the reflecting surface to be of a step type, a zigzag type or a wave type under the same input light energy, the reflecting area is enlarged, the uniformity is higher, and meanwhile, the volume can be reduced.

As shown in fig. 4, the light-emitting surface 14 is of a scale shape, so that the light emitted from the light guide 10 is more uniform, and the light guide effect of the light guide 10 is better.

In this embodiment, as shown in fig. 1, 3 and 4, the upper and lower sides of the light guide 10 are flat, so that the light guide 10 is convenient to use and install.

As shown in fig. 1 to 4, the present embodiment also provides an optical system including:

A lens assembly 50, wherein a light passing region 20 is arranged in the lens assembly 50;

Light guide 10, light guide 10 is light guide 10 as described above and is disposed in light-transmitting region 20;

the first light source 30, the light of the first light source 30 is transmitted from the light-transmitting port 11 through the light guide 10 in the light-transmitting area 20; and

The light of the second light source 40 enters the light guide 10 from the light incident surface 12, is reflected to the light emergent surface 14 by the reflecting surface 13, and then passes out of the light guide 10 from the light emergent surface 14 so as to be continuously transmitted in the light transmitting area 20.

The specific working process and principle of the optical system provided in this embodiment are as follows:

As shown in fig. 2 and 5, the light of the first light source 30 located in the non-edge area of the light-passing area 20 passes through the light-passing opening 11 to continue to transmit in the light-passing area 20, so as to facilitate subsequent imaging. Referring to fig. 5, the light beam of the first light source 30 located at the edge of the light-transmitting area 20 is incident into the light guide 10 from the light incident surface 12. After the light enters the light guide 10, the light meeting the condition of total reflection on the reflecting surface 13 and/or the light-emitting surface 14 is totally reflected on the reflecting surface 13 and/or the light-emitting surface 14, so that the light propagates along the propagation direction, the light fills the whole light guide, and the light which does not meet the condition of total reflection on the reflecting surface 13 and/or the light-emitting surface 14 passes out of the light guide 10 from the light-emitting surface 14 to continue to be transmitted in the light-transmitting region 20. Specifically, when the included angle θ between the light ray and the perpendicular to the reflecting surface 13 or the light emitting surface 14 is equal to or greater than arcsin (n) (n is the refractive index of the optical/optical dense medium), total reflection occurs.

The optical system provided in this embodiment sets the light guide 10 in the lens assembly 50, and the light guide 10 is provided with the light-transmitting opening 11, the light-incident surface 12, the reflecting surface 13 and the light-emergent surface 14, the light of the first light source 30 passes through the light guide 10 from the light-transmitting opening 11 and is transmitted in the light-transmitting area 20, and the light of the second light source 40 is injected into the light guide 10 from the light-incident surface 12, reflected by the reflecting surface 13 to the light-emergent surface 14, and then passes out of the light guide 10 from the light-emergent surface 14 to continue to be transmitted in the light-transmitting area 20, thereby increasing the light-emergent range of the lens assembly 50.

In the present embodiment, as shown in fig. 1 and 2, the lens assembly 50 includes a first lens 51, and the first lens 51 is located between the first light source 30 and the light guide 10. The lens assembly 50 further includes a second lens 52, the second lens 52 being disposed on a side of the light guide 10 remote from the first lens 51. The second lens 52 is disposed opposite to the light-emitting surface 14 of the light guide 10, and the size and shape of the projection of the light-emitting surface 14 on the plane of the second lens 52 correspond to the size and shape of the second lens 52, respectively.

The light of the first light source 30 is incident on the first lens 51, and the light emitted from the non-edge area of the first lens 51 passes through the light-passing hole 11 and then is incident on the second lens 52, so as to be continuously transmitted in the light-passing area 20. The light emitted from the edge of the first lens 51 enters the light guide 10 from the light entrance surface 12. The light rays meeting the total reflection condition are transmitted through total reflection on the reflecting surface 13 and/or the light emitting surface 14, and the light rays not meeting the total reflection condition are reflected to the light emitting surface 14 by the reflecting surface 13, then are transmitted from the light emitting surface 14 and then are emitted to the second lens 52 so as to be continuously transmitted in the light transmitting area 20. Specifically, when the included angle θ between the light ray and the perpendicular to the reflecting surface 13 or the light emitting surface 14 is equal to or greater than arcsin (n) (n is the refractive index of the optical/optical dense medium), total reflection occurs.

The edge of the opposite side of the first lens 51 to the light guide 10 is disposed corresponding to the light incident surface 12, so that the light emitted from the edge of the first lens 51 can be incident on the light incident surface 12, so that the light guide 10 can diffuse and transmit the light.

In the present embodiment, the first lens 51 is a convex lens and has a circular shape, and the outer peripheral edges of the first lens 51 emit light. In order to better and more conveniently receive the light rays emitted from the edge of the first lens 51, the light incident surface 12 is connected with the light passing port 11, so that a main part of the light rays emitted from the first light source 30 passes through the light passing port 11, and meanwhile, the light rays emitted from the edge of the first lens 51 can be received by the light incident surface 12. In order to further receive the light emitted from the edge of the first lens 51, as shown in fig. 3, the light incident surface 12 is annular and has a size corresponding to the size of the first lens 51.

The size of the projection area of the light emitting surface 14 on the plane of the second lens 52 determines the size of the range of the light emitted from the light emitting surface 14, and further determines the light emitting range of the whole optical system. The size and shape of the projection of the light emitting surface 14 on the plane of the second lens 52 correspond to the size and shape of the second lens 52, so that the light guide 10 can effectively increase the light emitting range of the optical system without increasing the volume of the whole optical system.

As shown in fig. 1 and 2, the second lens 52 is larger in size than the first lens 51. Since the size of the light incident surface 12 corresponds to the size of the first lens 51, the size of the projection of the light emergent surface 14 on the plane of the second lens 52 corresponds to the size of the second lens 52, and the light guide 10 is substantially funnel-shaped.

One or more lenses may be further disposed between the first light source 30 and the first lens 51, and one or more lenses may be further disposed behind the second lens 52, which is not particularly limited herein.

The present embodiment also provides a projection system, including the optical system as described above, where the first light source 30 includes an image generating unit, and the image generating unit is a DMD (Digital Micromirror Device ), MEMS (Micro Electro MECHANICAL SYSTEM, micro Electro mechanical system), LCOS (Liquid Crystal on Silicon ), or an array LED chip, and the projection system provided in this embodiment has a large light emitting range. The first light source 30 may be a halogen lamp, a sodium lamp, an incandescent lamp, or the like.

The embodiment also provides a car lamp, which comprises the optical system, wherein the first light source is an LED, and the light emitting range of the car lamp is large.

The embodiment also provides a vehicle comprising the vehicle lamp. In this embodiment, the vehicle is an automobile. In other embodiments, the vehicle may be a non-motor vehicle.

Fig. 9 is a flowchart of an operation method of an optical system according to an embodiment of the application.

As shown in fig. 9, the present embodiment further provides an optical system operation method, where the optical system is the aforementioned optical system, and the optical system operation method includes:

Step 60, transmitting the light of the first light source 30 from the light-transmitting port 11 through the light guide 10 in the light-transmitting region 20;

In step 70, the light of the second light source 40 enters the light guide 10 from the light incident surface 12, is reflected from the reflecting surface 13 to the light emergent surface 14, and then passes out of the light guide 10 from the light emergent surface 14, so as to be continuously transmitted in the light passing region 20.

Example 2

Fig. 10 is a schematic structural diagram of a light guide according to an embodiment of the present application, and fig. 11 is a top view of an optical system according to an embodiment of the present application.

As shown in fig. 4, 10 and 11, the present embodiment provides a light guide 10 for placement in a light passing region 20 of an optical system. The light guide includes:

the light incident surface 15 is configured to receive the light of the second light source 80 and make the light of the second light source 80 enter the light guide 10;

a reflection surface 13 for reflecting light incident into the light guide 10 from the light incident surface 15; and

The light guide 10 provided in this embodiment includes a light-passing opening 11, a light-entering surface 15, a reflecting surface 13 and a light-exiting surface 14, wherein the light of the first light source 30 passing through the light guide 10 is used by the light-passing opening 11, the light-entering surface 15 is used by the light of the second light source 80 to be injected into the light guide 10, the reflecting surface 13 is used to reflect the light injected into the light guide 10 from the light-entering surface 15, the light-exiting surface 14 is used by the light reflected by the reflecting surface 13 to pass out of the light guide 10 to continue to be transmitted in the light-passing area 20, so that the light of the second light source 80 is guided into the light-passing area 20, and the light-exiting range of the light-passing area 20 is increased.

Specifically, the light guide 10 provided in this embodiment is approximately funnel-shaped with two open ends, the light-transmitting opening 11 is opened at one small open end, and the first light source 30 is disposed opposite to the light-transmitting opening 11 side of the light guide 10. The reflecting surface 13 is located on the outer peripheral surface of the funnel, and the light emitting surface 14 is located on the inner peripheral surface of the funnel.

In this embodiment, as shown in fig. 10, the light-transmitting port 11 is arranged in the middle of the light guide 10 and is circular, so that the light-transmitting effect and the light-guiding effect are good. In other embodiments, it will be apparent to those skilled in the art that other positions where the light-transmitting port 11 is opened in the light guide 10 are also within the scope of the present application. And in other embodiments, the light-transmitting opening 11 may be elliptical, rectangular or other irregular shape, which is not specifically limited herein.

In this embodiment, as shown in fig. 10 and 11, the second light source 80 is a light source independent from the first light source 30, the light incident surface 15 is disposed on the outer edge of the light guide 10, and the second light source 80 is disposed opposite to the light incident surface 15. Specifically, the light beam that is not totally reflected on the reflection surface 13 passes through the light guide 10 from the light exit surface 14. Further, the number of the light incident surfaces 15 is two, the two light incident surfaces 15 are respectively disposed on two side edges of the light guide 10, and the number of the second light sources 80 corresponds to the number of the light incident surfaces 15.

Fig. 12 is a schematic diagram of a light guide of an optical system according to an embodiment of the application.

As shown in fig. 10 to 12, the working principle of the light guide 10 provided in the present embodiment is as follows:

The light of the first light source 30 passes through the light-transmitting port 11 to continue to be transmitted in the light-transmitting region 20. The light of the second light source 80 enters the light guide 10 from the light incident surface 15. After the light enters the light guide 10, the light meeting the condition of total reflection on the reflecting surface 13 and/or the light-emitting surface 14 is transmitted in a total reflection way on the reflecting surface 13 and/or the light-emitting surface 14, and the light not meeting the condition of total reflection on the reflecting surface 13 and/or the light-emitting surface 14 passes out of the light guide 10 from the light-emitting surface 14 to continue to be transmitted in the light-transmitting area 20. Specifically, when the included angle θ between the light ray and the perpendicular to the reflecting surface 13 or the light emitting surface 14 is equal to or greater than arcsin (n) (n is the refractive index of the optical/optical dense medium), total reflection occurs.

The light incident surface 15 of the light guide 10 provided in the present embodiment is disposed on the outer edge of the light guide 10, so as to be used for receiving the light of the second light source 80 independent of the first light source 30, and the light guide 10 guides the additional light into the light passing area 20 by adding the additional light source (i.e. the second light source 80) to provide the light for the light guide 10, thereby increasing the light emitting range for the optical system using the light guide 10.

Further, the two light incident surfaces 15 are respectively disposed on the outer edges of the left and right sides of the light guide 10, the structure is simple and convenient, and the light emergent surface 14 of the light guide 10 has more uniform light emergent effect due to the symmetrical arrangement.

In other embodiments, the number of light incident surfaces 15 may be only one, and may be only one outer edge of the light guide 10, or may be any one of the upper, lower, left and right outer edges. The number of the light incident surfaces 15 may be two, and the light incident surfaces may be respectively disposed on the upper and lower outer edges. The number of light incident surfaces 15 may be three, and they may be respectively disposed on any three outer edges of the upper, lower, left and right sides of the light guide 10. In other embodiments, the light guide 10 is provided with the light incident surface 15 on the entire peripheral side edge, which is not limited herein.

The number of the second light sources 80 corresponds to the number of the light incident surfaces 15, so that each light incident surface 15 can receive light. For example, when the number of the light incident surfaces 15 is two, the number of the second light sources 80 is also two, and each second light source 80 is disposed opposite to the corresponding light incident surface 15. An increase in the number of second light sources 80 also increases the amount of light for the lens assembly 50, thereby increasing the light extraction range of the overall optical system.

By providing a second light source 80, e.g. an LED light source, a brighter and uniform lighting effect can be achieved by local light filling. In particular, by a rational setting of the number, position, power and/or rational setting of the microstructure density (the greater the density, the higher the illumination brightness) of the LED light sources, the brightness can be locally controlled, whereby special illumination effects are achieved, for example, in oblique illumination or projection, the brightness uniformity can be ensured on the projection surface.

Fig. 13 is a cross-sectional view of a light guide according to an embodiment of the present application, fig. 14 is a cross-sectional view of a light guide according to another embodiment of the present application, and fig. 15 is a cross-sectional view of a light guide according to yet another embodiment of the present application.

Further, the light incident surface 15 is curved, and the cross section of the light incident surface 15 is arc-shaped (as shown in fig. 13), zigzag-shaped (as shown in fig. 14) or array arc-shaped (as shown in fig. 15). The light incident surface 15 is provided with first or second grooves (similar to the first and second grooves 121 and 122 in embodiment 1), and the inclination angles of the first and second grooves are different. In this embodiment, the first lines are transverse lines and the second lines are vertical lines.

The cross section of the light incident surface 15 is in a circular arc shape, a zigzag shape or an array circular arc shape, and the microstructure arrangement of the first grains or the second grains is arranged on the light incident surface 12, so that the incident light is homogenized, the light uniformly comprises the light rays of all angles, and finally the outgoing light beam of the light guide 10 is better uniform. The cross section of the light incident surface 15 is set to be arc-shaped or saw-tooth-shaped, under the same light energy of input light, the number of reflection times on the reflecting surface 13 is increased, the reflecting area is enlarged, the uniformity is higher, and meanwhile, the volume can be reduced.

Further, the number of microstructures within 1mm at the light incident surface 15 and the reflecting surface 13 is not less than 5, so that the total reflection times on the reflecting surface 13 is increased, and the light is more uniform.

As shown in fig. 10, the reflecting surface 13 is of a step type, a zigzag type or a wave type, so that the total reflection effect is good, that is, the light guide effect of the light guide 10 is better, that is, the reflecting times can be increased, the reflecting area can be enlarged, the uniformity is better, and the volume can be reduced by arranging the reflecting surface into a step type, a zigzag type or a wave type under the same input light energy.

As shown in fig. 1, 4 and 10, in the present embodiment, the upper and lower sides of the light guide 10 are flat surfaces, so that the light guide 10 is convenient to use and install.

As shown in fig. 10 to 12, the present embodiment also provides an optical system including:

The light of the second light source 80 is emitted into the light guide 10 from the light incident surface 15, reflected to the light emergent surface 14 by the reflecting surface 13, and then passes out of the light guide 10 from the light emergent surface 14 so as to be continuously transmitted in the light transmitting area 20.

The light of the first light source 30 passes through the light-transmitting port 11 to continue to be transmitted in the light-transmitting region 20. The light of the second light source 80 enters the light guide 10 from the light incident surface 15. After the light enters the light guide 10, the light meeting the condition of total reflection on the reflecting surface 13 and/or the light emitting surface 14 is totally reflected on the reflecting surface 13 and/or the light emitting surface 14, and the light not meeting the condition of total reflection on the reflecting surface 13 and/or the light emitting surface 14 passes out of the light guide 10 from the light emitting surface 14 to continue to be transmitted in the light passing area 20. Specifically, when the included angle θ between the light ray and the perpendicular to the reflecting surface 13 or the light emitting surface 14 is equal to or greater than arcsin (n) (n is the refractive index of the optical/optical dense medium), total reflection occurs.

The optical system provided in this embodiment sets the light guide 10 in the lens assembly 50, and the light guide 10 is provided with the light-passing opening 11, the light-entering surface 15, the reflecting surface 13 and the light-exiting surface 14, the light of the first light source 30 passes through the light guide 10 from the light-passing opening 11 and is transmitted in the light-passing area 20, and the light guide 10 is provided with the light by setting the additional light source (i.e. the second light source 80), and the light guide 10 guides the additional light into the light-passing area 20 of the lens assembly 50, thereby increasing the light-exiting range for the whole optical system.

The light of the first light source 30 is transmitted through the first lens 51, and then passes through the light-passing hole 11 and then enters the second lens 52 to be transmitted in the light-passing area 20. The light of the second light source 80 enters the light guide 10 from the light entrance surface 15. The light rays meeting the total reflection condition are transmitted through total reflection on the reflecting surface 13 and/or the light emitting surface 14, and the light rays not meeting the total reflection condition are reflected to the light emitting surface 14 by the reflecting surface 13, then are transmitted from the light emitting surface 14 and then are emitted to the second lens 52 so as to be continuously transmitted in the light transmitting area 20. Specifically, when the included angle θ between the light ray and the perpendicular to the reflecting surface 13 or the light emitting surface 14 is equal to or greater than arcsin (n) (n is the refractive index of the optical/optical dense medium), total reflection occurs.

In the present embodiment, the first lens 51 is a convex lens and has a circular shape.

As shown in fig. 1 and 2, the second lens 52 is larger in size than the first lens 51. Since the size of the light incident surface 15 corresponds to the size of the first lens 51, the size of the projection of the light emergent surface 14 on the plane of the second lens 52 corresponds to the size of the second lens 52, and the light guide 10 is substantially funnel-shaped.

The present embodiment also provides a projection system, including the aforementioned optical system, where the first light source 30 includes an image generating unit, and the image generating unit is DMD, MEMS, LCOS or an array LED chip, and the light emitting range of the projection system provided in this embodiment is large. The first light source 30 may be a halogen lamp, a sodium lamp, an incandescent lamp, or the like.

In step 70, the light of the second light source 80 enters the light guide 10 from the light incident surface 15, is reflected from the reflecting surface 13 to the light emergent surface 14, and then passes out of the light guide 10 from the light emergent surface 14, so as to be continuously transmitted in the light passing region 20.

Example 3

Fig. 16 is a schematic structural diagram of a light guide according to an embodiment of the present application, and fig. 17 is a top view of an optical system according to an embodiment of the present application.

As shown in fig. 4, 16 and 17, the present embodiment provides a light guide 10 for placement in a light passing region 20 of an optical system. The light guide includes:

The light incident surface 16 is configured to receive the light of the second light source 90 and make the light of the second light source 90 enter the light guide 10;

A reflection surface 13 for reflecting light incident into the light guide 10 from the light incident surface 16; and

The light guide 10 provided in this embodiment includes a light-passing opening 11, a light-in surface 16, a reflective surface 13 and a light-out surface 14, wherein the light of the first light source 30 is passed through the light guide 10 through the light-passing opening 11, the light of the second light source 90 is injected into the light guide 10 through the light-in surface 16, the light of the light injected into the light guide 10 through the light-in surface 16 is reflected by the reflective surface 13, the light of the light-out surface 14 is passed through the light guide 10 through the light reflected by the reflective surface 13 to continue to be transmitted in the light-passing region 20, so that the light of the second light source 90 is guided into the light-passing region 20, and the light-out range of the light-passing region 20 is increased.

In this embodiment, the light-transmitting port 11 is arranged in the middle of the light guide 10 and is circular, so that the light-transmitting effect and the light-guiding effect are good. In other embodiments, it will be apparent to those skilled in the art that other positions where the light-transmitting port 11 is opened in the light guide 10 are also within the scope of the present application. And in other embodiments, the light-transmitting opening 11 may be elliptical, rectangular or other irregular shape, which is not specifically limited herein.

In the present embodiment, as shown in fig. 17, the second light source 90 includes a first light unit 91 and a second light unit 92, the first light unit 91 is formed by light rays of the first light source 30 located at the edge of the light passing area 20, and the second light unit 92 is a light source independent from the first light source 30.

As shown in fig. 16, the light incident surface 16 includes a first light incident surface 161 and a second light incident surface 162, the first light incident surface 161 is disposed on an inner peripheral edge of the light passing opening 11, the second light incident surface 162 is disposed on an outer edge of the light guide 10, the number of the second light incident surfaces 162 is two, the two second light incident surfaces 162 are respectively disposed on two side edges of the light guide 10, and the second light unit 92 is disposed opposite to the second light incident surface (162). The number of second light units 92 corresponds to the number of second light incident surfaces (162). Specifically, the light beam that is not totally reflected on the reflection surface 13 passes through the light guide 10 from the light exit surface 14.

In the light guide 10 provided in this embodiment, the light of the first light source 30 located in the non-edge area of the light-passing area 20 passes through the light-passing opening 11 to continue to be transmitted in the light-passing area 20. The light of the first light source 30 located at the edge of the light passing region 20, that is, the light of the first light unit 91, enters the light guide 10 from the first light incident surface 161. The light of the second light unit 92 enters the light guide 10 from the second light incident surface 162. Light entering the light guide 10 is transmitted by total reflection on the reflecting surface 13 and/or the light-emitting surface 14, and light which does not satisfy the condition of total reflection on the reflecting surface 13 and/or the light-emitting surface 14 passes through the light guide 10 from the light-emitting surface 14 to continue to be transmitted in the light-transmitting region 20. Specifically, when the included angle θ between the light ray and the perpendicular to the reflecting surface 13 or the light emitting surface 14 is equal to or greater than arcsin (n) (n is the refractive index of the optical/optical dense medium), total reflection occurs.

The light incident surface 16 of the light guide 10 provided in the present embodiment includes a first light incident surface 161 and a second light incident surface 162, the first light incident surface 161 is used for guiding the light at the edge of the light passing area 20 of the first light source 30 into the optical system to increase the light emitting range, and the second light incident surface 162 is used for guiding the light of the second light unit 92 independent from the first light source 30 into the optical system to increase the overall light emitting range of the optical system. The light incident surface 16 provided in this embodiment includes two light incident surfaces, and the area for receiving light is large, so that more light can be introduced into the optical system using the light guide, and the light emergent range of the whole optical system is larger.

Further, the two second light incident surfaces 162 are respectively disposed on the outer edges of the left and right sides of the light guide 10, the structure is simple and convenient, and the light emergent surface 14 of the light guide 10 has more uniform light emergent effect due to the symmetrical arrangement.

In other embodiments, the number of the second light incident surfaces 162 may be only one, and may be only one of the outer edges of the light guide 10, or may be any one of the upper, lower, left and right outer edges. The number of the second light incident surfaces 162 may be two, and the second light incident surfaces may be respectively disposed on the upper and lower outer edges. The number of the second light incident surfaces 162 may be three, and the second light incident surfaces may be respectively disposed on any three outer edges of the upper, lower, left and right sides of the light guide 10. In other embodiments, the second light incident surface 162 is disposed on the entire periphery side edge of the light guide 10, which is not limited herein.

The number of the second light units 92 corresponds to the number of the second light incident surfaces 162, so that each of the second light incident surfaces 162 can receive light. For example, when the number of the second light incident surfaces 162 is two, the number of the second light units 92 is also two, and each second light unit 92 is disposed opposite to the corresponding second light incident surface 162. An increase in the number of second light units 92 also increases the amount of light for the lens assembly 50, thereby increasing the light extraction range of the overall optical system.

Further, the first light incident surface 161 is annular. The cross sections of the first light incident surface 161 and the second light incident surface 162 are respectively arc-shaped (as shown in fig. 6 and 13), zigzag-shaped (as shown in fig. 7 and 14) or array arc-shaped (as shown in fig. 8 and 15), so that the effect of receiving light by the light incident surface 16 is increased, and the light emitting range of the whole optical system is increased. Specifically, the cross sections of the first light incident surface 161 and the second light incident surface 162 may be made to be circular arc, saw tooth or array circular arc by forming a plurality of grooves on the first light incident surface 161 and the second light incident surface 162.

The first light incident surface 161 and the second light incident surface 162 are respectively provided with first grooves or second grooves (similar to the first grooves 121 and the second grooves 122 in embodiment 1), and the inclination angles of the first grooves and the second grooves are different. In this embodiment, the first lines are transverse lines and the second lines are vertical lines.

The cross sections of the first light incident surface 161 and the second light incident surface 162 are circular arc, zigzag or array circular arc, and the first light incident surface 161 and the second light incident surface 162 are provided with the microstructure arrangement of the first lines or the second lines, so that the incident light is homogenized, the light uniformly comprises the light of all angles, and finally the outgoing light beam of the light guide 10 is better uniform. The cross section of the light incident surface 12 is set to be arc-shaped or saw-tooth-shaped, the number of reflection times on the reflecting surface 13 is increased under the same input light energy, the reflecting area is enlarged, the uniformity is improved, and the volume can be reduced.

As shown in fig. 16, the reflecting surface 13 is of a step type, a zigzag type or a wave type, so that the total reflection effect is good, that is, the light guide effect of the light guide 10 is better, that is, the reflecting times can be increased, the reflecting area can be enlarged, the uniformity is better, and the volume can be reduced by arranging the reflecting surface into a step type, a zigzag type or a wave type under the same input light energy.

In this embodiment, as shown in fig. 1, 4 and 16, the upper and lower sides of the light guide 10 are flat, so that the light guide 10 is convenient to use and install.

As shown in fig. 17, the present embodiment also provides an optical system including:

The light of the second light source 90 enters the light guide 10 from the light incident surface 16, is reflected to the light emergent surface 14 by the reflecting surface 13, and then passes out of the light guide 10 from the light emergent surface 14 so as to be continuously transmitted in the light transmitting area 20.

The light of the first light source 30 located in the non-edge area of the light-transmitting area 20 passes through the light-transmitting opening 11 to continue to transmit in the light-transmitting area 20. Light rays of the first light source 30 located at the edge of the light passing region 20 enter the light guide 10 from the first light incident surface 161. The light of the second light source 90 enters the light guide 10 from the second light incident surface 162. Light entering the light guide 10 is transmitted by total reflection on the reflecting surface 13 and/or the light-emitting surface 14, and light which does not satisfy the condition of total reflection on the reflecting surface 13 and/or the light-emitting surface 14 passes through the light guide 10 from the light-emitting surface 14 to continue to be transmitted in the light-transmitting region 20. Specifically, when the included angle θ between the light ray and the perpendicular to the reflecting surface 13 or the light emitting surface 14 is equal to or greater than arcsin (n) (n is the refractive index of the optical/optical dense medium), total reflection occurs.

The optical system provided in the present embodiment sets the light guide 10 in the lens assembly 50, and the light incident surface 16 of the light guide 10 includes a first light incident surface 161 and a second light incident surface 162, wherein the first light incident surface 161 is used for guiding the light at the edge of the light passing area 20 into the optical system to increase the light emitting range, and the second light incident surface 162 is used for guiding the light of the second light source 90 independent from the first light source 30 into the optical system to increase the overall light emitting range of the optical system. The light guide 10 provided in this embodiment includes two light incident surfaces, and has a large light receiving area, so that more light can be introduced into the optical system, and the light emitting range of the whole optical system is wider.

The light of the first light source 30 is incident on the first lens 51, and the light emitted from the non-edge area of the first lens 51 passes through the light-passing hole 11 and then is incident on the second lens 52, so as to be continuously transmitted in the light-passing area 20. The light emitted from the edge of the first lens 51 enters the light guide 10 from the first light incident surface 161. The light of the second light source 90 enters the light guide 10 from the second light incident surface 162. The light rays meeting the total reflection condition are transmitted through total reflection on the reflecting surface 13 and/or the light emitting surface 14, and the light rays not meeting the total reflection condition are reflected to the light emitting surface 14 by the reflecting surface 13, then are transmitted from the light emitting surface 14 and then are emitted to the second lens 52 so as to be continuously transmitted in the light transmitting area 20. Specifically, when the included angle θ between the light ray and the perpendicular to the reflecting surface 13 or the light emitting surface 14 is equal to or greater than arcsin (n) (n is the refractive index of the optical/optical dense medium), total reflection occurs.

The edge of the opposite side of the first lens 51 to the light guide 10 is disposed corresponding to the first light incident surface 161, so that the light emitted from the edge of the first lens 51 can be incident on the first light incident surface 161, so that the light guide 10 can diffuse and transmit the light.

In this embodiment, the first lens 51 is a convex lens and has a circular shape, and the peripheral edge of the first lens 51 has light outgoing, so that the first light incoming surface 161 is connected with the light passing opening 11 for better and more convenient receiving of the light outgoing from the edge of the first lens 51, so that the light outgoing from the edge of the first lens 51 can be received by the first light incoming surface 161 while the main part of the light emitted by the first light source 30 passes through the light passing opening 11. In order to further receive the light emitted from the edge of the first lens 51, as shown in fig. 3, the first light incident surface 161 is annular and has a size corresponding to the size of the first lens 51.

As shown in fig. 1 and 2, the second lens 52 is larger in size than the first lens 51. Since the size of the light incident surface 16 corresponds to the size of the first lens 51, the size of the projection of the light emergent surface 14 on the plane of the second lens 52 corresponds to the size of the second lens 52, and the light guide 10 is substantially funnel-shaped.

In step 70, the light of the second light source 90 enters the light guide 10 from the light incident surface 16, is reflected from the reflecting surface 13 to the light emergent surface 14, and then passes out of the light guide 10 from the light emergent surface 14, so as to be continuously transmitted in the light passing region 20.

In the description of the present invention, it should be noted that the azimuth or positional relationship indicated by the terms "upper", "lower", etc. are based on the azimuth or positional relationship shown in the drawings, and are merely for convenience of describing the present invention and simplifying the description, and are not indicative or implying that the apparatus or element in question must have a specific azimuth, be constructed and operated in a specific azimuth, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; the communication may be direct or indirect through an intermediate medium, or may be internal to two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art. Furthermore, in the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more.

The foregoing is only illustrative of the present invention and is not to be construed as limiting thereof, but rather as various modifications, equivalent arrangements, improvements, etc., within the spirit and principles of the present invention.

Claims

1. A light guide (10) for placement in a light passing region (20) of an optical system, the light guide (10) comprising:

a light-passing port (11) for passing the light of the first light source (30) through the light guide (10);

A light incident surface for receiving light of the second light source so as to make the light incident into the light guide (10);

a reflecting surface (13) for reflecting light rays entering the light guide (10) from the light incident surface; and

A light emitting surface (14) for allowing the light reflected by the reflecting surface (13) to pass through the light guide (10) to continue to transmit in the light passing region (20);

The light guide (10) is in a funnel shape with two open ends, the light-passing opening (11) is formed in one small-opening end, the first light source (30) is arranged opposite to the light-passing opening (11) side of the light guide (10), the reflecting surface (13) is positioned on the outer peripheral surface of the funnel, and the light-emitting surface (14) is positioned on the inner peripheral surface of the funnel;

The light incident surface is arranged on the inner peripheral edge of the light through opening (11) and/or the outer side edge of the light guide (10);

After entering the light guide (10), light rays meeting the condition of total reflection on the reflecting surface (13) and/or the light emitting surface (14) are transmitted in a total reflection mode on the reflecting surface (13) and/or the light emitting surface (14), and light rays not meeting the condition of total reflection on the reflecting surface (13) and/or the light emitting surface (14) pass through the light guide (10) from the light emitting surface (14) so as to continue to be transmitted in the light transmitting area (20).

2. The light guide (10) according to claim 1, wherein the second light source is constituted by light rays of the first light source (30) located at the edge of the light passing region (20), and the light incident surface is provided on the inner peripheral edge of the light passing opening (11).

3. The light guide (10) of claim 2, wherein the light entrance surface is annular.

4. The light guide (10) according to claim 1, wherein the second light source is a light source independent from the first light source (30), the light incident surface is disposed on an outer edge of the light guide (10), and the second light source is disposed opposite to the light incident surface.

5. The light guide (10) according to claim 4, wherein the number of light incident surfaces is two, the two light incident surfaces are respectively disposed on two side edges of the light guide (10), and the number of the second light sources corresponds to the number of the light incident surfaces.

6. The light guide (10) according to claim 2 or 4, wherein the cross section of the light entrance surface is circular arc, saw tooth or array circular arc.

7. The light guide (10) according to claim 6, wherein the light incident surface is provided with first grooves (121) or second grooves (122).

8. The light guide (10) according to claim 1, wherein the second light source comprises a first light unit (91) and at least a second light unit (92), the first light unit (91) being formed by light rays of the first light source (30) located at the edge of the light passing area (20), the second light unit (92) being a light source independent from the first light source (30);

The light incident surface comprises a first light incident surface (161) and a second light incident surface (162), the first light incident surface (161) is arranged on the inner peripheral edge of the light passing opening (11), the second light incident surface (162) is arranged on the outer side edge of the light guide (10), and the second light unit (92) and the second light incident surface (162) are oppositely arranged.

9. The light guide (10) according to claim 8, wherein the first light incident surface (161) is annular, the number of the second light incident surfaces (162) is two, the two second light incident surfaces (162) are respectively disposed on two side edges of the light guide (10), and the number of the second light units (92) corresponds to the number of the second light incident surfaces (162).

10. The light guide (10) according to claim 8, wherein the cross-section of the first light incident surface (161) and the second light incident surface (162) is circular-arc, zigzag, or array circular-arc, respectively.

11. The light guide (10) according to claim 10, wherein the first light incident surface (161) and the second light incident surface (162) are provided with first or second grooves, respectively.

12. The light guide (10) according to claim 1, characterized in that the reflecting surface (13) is stepped, zigzag or wavy.

13. The light guide (10) according to claim 1, wherein the light exit surface (14) is of a scale-type.

14. An optical system, comprising:

a lens assembly (50), wherein a light transmission area (20) is arranged in the lens assembly (50);

a light guide (10), the light guide (10) being a light guide (10) according to any one of claims 1-13 and being arranged in the light passing area (20);

A first light source (30), wherein light rays of the first light source (30) pass through the light guide (10) from the light-passing port (11) and are transmitted in the light-passing area (20); and

The light rays of the second light source are reflected to the light emitting surface (14) by the reflecting surface (13) and then pass out of the light guide (10) from the light emitting surface (14) so as to be continuously transmitted in the light passing area (20).

15. The optical system according to claim 14, wherein the lens assembly (50) comprises a first lens (51), the first lens (51) being located between the first light source (30) and the light guide (10);

the edge of the side of the first lens (51) opposite to the light guide (10) is arranged corresponding to the light incident surface.

16. The optical system according to claim 15, wherein the lens assembly (50) further comprises a second lens (52), the second lens (52) being provided at a side of the light guide (10) remote from the first lens (51);

The second lens (52) is arranged opposite to the light emitting surface (14) of the light guide (10), and the size and the shape of the projection of the light emitting surface (14) on the plane where the second lens (52) is positioned correspond to the size and the shape of the second lens (52) respectively.

17. A projection system comprising an optical system according to any of claims 14-16, wherein the first light source (30) comprises an image generation unit, which is DMD, MEMS, LCOS or an array LED chip.

18. A vehicle lamp, characterized in that it comprises an optical system according to any one of claims 14-16, said first light source (30) being an LED.

19. A vehicle lamp comprising the projection system of claim 17.

20. A vehicle comprising a lamp as claimed in claim 18 or 19.

21. A method of operating an optical system, wherein the optical system is as claimed in any one of claims 14 to 16, the method comprising:

Light rays of the first light source (30) pass through the light guide (10) from the light-passing port (11) and are transmitted in the light-passing area (20);

The light of the second light source is emitted into the light guide (10) from the light incident surface, reflected to the light emergent surface (14) from the reflecting surface (13), and then passes out of the light guide (10) from the light emergent surface (14) so as to continue to be transmitted in the light passing area (20).

22. The method of operation of an optical system according to claim 21, wherein the second light source is constituted by light rays of the first light source (30) located at the edge of the light passing region (20), and the light incident surface is provided on the inner peripheral edge of the light passing port (11).

23. The method according to claim 21, wherein the second light source is a light source independent from the first light source (30), the light incident surface is disposed on an outer edge of the light guide (10), and the second light source is disposed opposite to the light incident surface.