CN114675479A

CN114675479A - Light guide, projection system, vehicle lamp, vehicle, optical system and method for operating the same

Info

Publication number: CN114675479A
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: 2022-06-28
Anticipated expiration: 2040-12-24
Also published as: CN114675479B

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 inlet is used for allowing the light 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 emitted into the light guide from the light incident surface; the light-emitting surface is used for allowing the light reflected by the reflecting surface to penetrate out of the light guide to be continuously transmitted in the light-transmitting area; thereby, the light of the second light source is guided into the light-passing region, and the light-emitting range of the light-passing region of the optical system is increased.

Description

Light guide, projection system, vehicle lamp, vehicle, optical system and method for operating the same

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

In today's society, automobiles are one of the important vehicles. With the progress of science and technology, people have higher and higher requirements on intellectualization, automation, safety and the like of automobiles, for example, people research on an Adaptive Driving Beam (ADB) system. The ADB system can automatically turn on or quit the high beam for the driver according to the driving state of the vehicle, the environmental state and the state of the road vehicle, or adaptively change the high beam light type according to the vehicle position in the field of view in front of the vehicle, thereby avoiding dazzling the driver, being more convenient and comfortable to use, and expanding the field of view illumination on the basis of ensuring the driving safety of the road.

With the development of the automobile lighting technology, the automobile headlamp is developed from the traditional lighting direction to the pixel headlamp which has both the ADB function and the ground projection function. On the one hand, the ADB function can be performed when the vehicle is driving at night. On the other hand, different logos may be projected in front of the vehicle for human-vehicle interaction purposes. One of the implementations of the pixel headlight is to project an image by means of a lens assembly by means of a pixel chip integrated with multiple LEDs as an image source.

However, as people have more and more requirements on the flattened appearance of the car lamp, when the conventional pixel headlamp is used, the brightness range of the light-emitting surface is very small, and great hidden troubles are left for driving 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 area of an optical system, the light guide including:

the light inlet is used for allowing the light 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 emitted 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; and

and the light emergent surface is used for enabling the light reflected by the reflecting surface to penetrate out of the light guide so as to be continuously transmitted in the light passing 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-transmitting area, and the light incident surface is arranged at the inner peripheral edge of the light-transmitting opening.

In one embodiment, the light incident surface is annular.

In one embodiment, the second light source is independent from 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 disposed 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 a circular arc shape, a sawtooth shape or an array circular arc shape.

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

In one embodiment, the second light source comprises a first light unit and at least one second light unit, the first light unit is formed by light rays of the first light source which are positioned at the edge of the light-transmitting area, and the second light unit is a light source which is independent from 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 through port, 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 arranged oppositely.

In one embodiment, the first light incident surfaces are annular, the number of the second light incident surfaces is two, the two second light incident surfaces are respectively disposed on edges of two sides 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 grain or a second grain.

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

In one embodiment, the light emitting surface is scaly.

In one embodiment, the light rays that are not totally reflected on the reflection surface pass out of the light guide from the light exit surface.

In one embodiment, the reflection surface is used for totally reflecting light, and the light emitting surface is used for totally reflecting light and guiding the light out of the light guide.

In one embodiment, the light rays meeting the total reflection condition can be transmitted in a total reflection manner between the reflection surface and the light emitting surface.

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

the lens component is provided with a light transmission area;

the light guide is the light guide of any one of the embodiments and is arranged in the light transmission area;

a first light source, wherein 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; and

and the light rays of the second light source enter the light guide from the light incident surface, are reflected to the light emergent surface by the reflecting surface, and penetrate out of the light guide from the light emergent surface so as to be continuously transmitted in the light transmitting area.

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

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

In one embodiment, the lens assembly further comprises a second lens, wherein the second lens is arranged on one side of the light guide away from the first lens;

the second lens is 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 located correspond to the size and the shape of the second lens respectively.

An embodiment of the present application further provides a projection system, including any of the above embodiments of the optical system, the first light source includes an image generating unit, and the image generating unit is a DMD, a MEMS, an 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 above embodiments, wherein 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 above embodiments.

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

An embodiment of the present application further provides an optical system operating method, where the optical system is the optical system described in any of the above embodiments, and the method includes:

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

the light of the second light source enters the light guide from the light incident surface, is reflected to the light emergent surface from the reflecting surface, and then penetrates out of the light guide from the light emergent surface to continue to be transmitted in the light transmitting area.

In an embodiment of the method for operating an optical system, the second light source is formed by light rays of the first light source located at an edge of the light-transmitting region, and the light incident surface is located at an inner peripheral edge of the light-transmitting opening.

In an embodiment of the method for operating an optical system, the second light source is a light source that is independent from 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 application provides a light guide is including leading to the light mouth, go into the plain noodles, plane of reflection and play plain noodles, it passes the light guide to lead to the light that the light mouth is used for first light source, it is used for receiving the light of second light source so that light jets into in the light guide to go into the plain noodles, the plane of reflection is used for the reflection to be jetted out the light guide in order continuing to transmit in the light guide area by going into by the plain noodles, thereby lead to the light of second light source in the light guide area, increase optical system's the light-emitting scope in light guide area.

Drawings

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

fig. 1 is a perspective view of an optical system provided in an embodiment of the present application;

FIG. 2 is a top view of an optical system provided in 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 angle of the light guide shown in FIG. 2

Fig. 5 is a schematic light guide diagram of a light guide of an optical system according to an embodiment of the present disclosure;

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

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

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

fig. 9 is a schematic flow chart illustrating an operation method of an optical system according to an embodiment of the present disclosure;

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

FIG. 11 is a top view of an optical system provided in 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 disclosure for guiding light;

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

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 yet another embodiment of the present application;

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

fig. 17 is a top view of an optical system provided in an embodiment of the present application.

Wherein, the correspondence between the reference numbers and the part names in fig. 1 to 17 is:

10. a light guide; 11. a light-through port; 12. a light incident surface; 121. a first pattern; 122. a second pattern; 13. a reflective 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 area; 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. a second light unit.

Detailed Description

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

It is to be noted that the embodiments shown in the drawings are only for the purpose of illustration and description of the inventive concept in a concrete and tangible manner, and are not necessarily to scale nor constitute a limitation of the inventive concept in terms of their dimensional structure. In the drawings, the light rays are indicated by solid lines to clearly illustrate the proposed solution.

The optical system of the prior art vehicle lamp includes a light source and a lens assembly, and the light source provides light to the lens assembly. The lens assembly includes a plurality of lenses through which light emitted from the light source passes in sequence, is magnified and optimized by the plurality of lenses, and is thereby imaged at a distance. And the light rays are transmitted among the plurality of lenses to form a light passing area in the lens assembly.

In the prior art, the light emitted from the edge of the lens (i.e. the light at the edge of the light-passing region 20) is not well transmitted to the next lens due to weak or relatively divergent light, so that the light loss is caused, and finally the light-emitting range of the optical system is small.

In view of the above technical problems, the present application provides a light guide, a projection system, a vehicle light, a vehicle, an optical system and an operation method thereof, and the following detailed description is provided by specific embodiments.

Example 1

Fig. 1 is a perspective view of an optical system according to an embodiment of the present disclosure, fig. 2 is a top view of the optical system shown in fig. 1, fig. 3 is a schematic perspective view of a light guide shown in fig. 1, and fig. 4 is a schematic perspective view of another view angle 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 transmission region 20 of an optical system. The light guide includes:

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

a light incident surface 12 for receiving the light of the second light source 40 and injecting the light of the second light source 40 into the light guide 10;

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

and the light emergent surface 14 is used for allowing the light reflected by the reflecting surface 13 to pass through the light guide 10 to continue to be transmitted in the light passing area 20.

The light guide 10 provided by this embodiment includes a light-passing port 11, a light-entering surface 12, a reflecting surface 13 and a light-exiting surface 14, where the light-passing port 11 is used for the light of the first light source 30 to pass through the light guide 10, the light-entering surface 12 is used for receiving the 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 the light entering the light guide 10 from the light-entering surface 12, and the light-exiting surface 14 is used for the light reflected from the reflecting surface 13 to pass through the light guide 10 to continue to be transmitted in the light-passing area 20, so that the light of the second light source 40 is guided into the light-passing area 20, and the light-exiting range of the light-passing area 20 is increased.

Specifically, as shown in fig. 3 and 4, the light guide 10 provided in this embodiment is substantially in the shape of a funnel with openings at both ends, and the light-passing opening 11 is provided at the end with the smaller opening. The first light source 30 is disposed opposite to the light inlet 11 side of the light guide 10. The reflecting surface 13 is located on the outer circumferential surface of the funnel, and the light emitting surface 14 is located on the inner circumferential surface of the funnel.

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

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

As shown in fig. 2 and 5, the light of the first light source 30 in the non-edge region of the light transmission region 20 passes through the light guide 10 from the light transmission port 11 to continue to be transmitted in the light transmission region 20. The light rays of the first light source 30 located at the edge of the light transmission region 20 enter the light guide 10 from the light incident surface 12. After the light enters the light guide 10, the light that satisfies the conditions of total reflection on the reflection surface 13 and/or the light-emitting surface 14 is transmitted by total reflection on the reflection surface 13 and/or the light-emitting surface 14, and the light that does not satisfy the conditions of total reflection on the reflection surface 13 and/or the light-emitting surface 14 passes out of the light guide 10 from the light-emitting surface 14 to be transmitted continuously in the light-transmitting area 20. Specifically, the light will be totally reflected when the included angle θ between the light and the perpendicular line of the reflection surface 13 or the light emitting surface 14 is greater than or equal to arcsin (n) (n is the refractive index of the optically thinner/optically denser medium).

The light guide provided in this embodiment guides light into the light guide 10, and the light guide 10 cooperates with the light-emitting surface 14 through the reflective surface 13 and the light-emitting surface 14 in the light guide 10, so that the light that satisfies the total reflection condition can be transmitted by total reflection between the reflective surface 13 and the light-emitting surface 14, and the light that does not satisfy the total reflection condition is emitted from the light-emitting surface 14.

The size of the light admission opening 11 corresponds to the size of the light admission area 20 of the light path before the light guide 10, while the size of the light exit surface 14 corresponds to the size of the light admission area 20 of the light path after the light guide 10, i.e. the radiation range of the light exit surface 14 corresponds to the light exit range of the optical system.

In this embodiment, as shown in fig. 3 and 4, the light-passing opening 11 is opened in the middle of the light guide 10 and is circular, so that the light-passing effect and the light-guiding effect are good. In other embodiments, those skilled in the art can easily understand that other positions of the light guide 10 where the light passing port 11 opens should be within the protection scope of the present application. And in other embodiments, the light passing opening 11 may be an oval, a rectangle or other irregular shape, which is not 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 receive the light of the first light source 30 located at the edge of the light-passing region 20, guide the light of the first light source 30 located at the edge of the light-passing region 20 into the light guide 10, and guide the light into the light-passing region 20 after being reflected so as to continue to be transmitted in the light-passing region 20.

Fig. 6 to 8 are cross-sectional views of a light incident surface of a light guide provided in an embodiment of the present 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 that the effect of receiving light by the light incident surface 12 is increased, and the light emitting range of the whole optical system is increased. Specifically, the cross section of the light incident surface 12 may be arc-shaped, zigzag-shaped, or array arc-shaped 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 first stripe 121 and the second stripe 122 have different inclination angles. In this embodiment, the first stripe 121 is a horizontal stripe, and the second stripe 122 is a vertical stripe.

In summary, the cross section of the light incident surface 12 is arc-shaped, zigzag-shaped or array arc-shaped, and the micro-structure arrangement of the first pattern or the second pattern on the light incident surface 12 performs homogenization processing on the incident light, so that the light uniformly includes light rays at various angles, and finally the emergent light beam of the light guide 10 is more uniform. The cross section of the light incident surface 12 is arc-shaped or sawtooth-shaped, so that under the same input light energy, the reflection times on the reflecting surface 13 are increased, the reflecting area is enlarged, the uniformity is better, and the volume can be reduced.

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

As shown in fig. 3, the reflective surface 13 is stepped, saw-toothed or wavy, and has good total reflection effect, and the light guide 10 has better light guiding effect, i.e. under the same input light energy, the reflective surface is set to be stepped, saw-toothed or wavy to increase the reflective frequency, enlarge the reflective area, have better uniformity, and reduce the volume.

As shown in fig. 4, the light emitting surface 14 is of a scale-nail 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 the present embodiment, as shown in fig. 1, 3 and 4, the upper and lower sides of the light guide 10 are flat surfaces, which facilitates the installation and use of the light guide 10.

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

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

a light guide 10, the light guide 10 being the light guide 10 as described above and disposed in the light-transmitting region 20;

a first light source 30, wherein light rays of the first light source 30 are transmitted in the light transmission area 20 from the light transmission opening 11 through the light guide 10; and

and a second light source 40, wherein light rays of the second light source 40 enter the light guide 10 from the light incident surface 12, 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 to continue to be transmitted in the light transmitting region 20.

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

as shown in fig. 2 and 5, light rays of the first light source 30 located at a non-edge region of the light transmission region 20 pass through the light transmission port 11 to continue to be transmitted in the light transmission region 20 for subsequent imaging. Referring to fig. 5, the light rays of the first light source 30 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 total reflection condition on the reflection surface 13 and/or the light-emitting surface 14 is totally reflected on the reflection 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 total reflection condition on the reflection 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, the light will be totally reflected when the included angle θ between the light and the perpendicular line of the reflection surface 13 or the light emitting surface 14 is greater than or equal to arcsin (n) (n is the refractive index of the optically thinner/optically denser medium).

In the optical system provided in this embodiment, the light guide 10 is disposed in the lens assembly 50, and the light guide 10 is provided with a light-passing opening 11, a light-entering surface 12, a reflecting surface 13 and a light-exiting surface 14, wherein 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 of the second light source 40 enters the light guide 10 from the light-entering surface 12, is reflected to the light-exiting surface 14 by the reflecting surface 13, and then passes out of the light guide 10 from the light-exiting surface 14 to continue to be transmitted in the light-passing area 20, so that the light-exiting range of the lens assembly 50 is enlarged.

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 comprises 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 where the second lens 52 is located correspond to the size and shape of the second lens 52, respectively.

The light from the first light source 30 enters the first lens 51, and the light emitted from the non-edge area of the first lens 51 passes through the light-transmitting opening 11 and then enters the second lens 52 to continue to be transmitted in the light-transmitting area 20. The light rays emitted from the edge of the first lens 51 enter the light guide 10 from the light entrance surface 12. The light rays meeting the total reflection condition are transmitted on the reflection surface 13 and/or the light emitting surface 14 in a total reflection manner, and the light rays not meeting the total reflection condition are reflected to the light emitting surface 14 by the emission surface 13, penetrate out of the light emitting surface 14 and enter the second lens 52 to be transmitted in the light transmission area 20 continuously. Specifically, the light will be totally reflected when the included angle θ between the light and the perpendicular line of the reflection surface 13 or the light emitting surface 14 is greater than or equal to arcsin (n) (n is the refractive index of the optically thinner/optically denser medium).

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

In the present embodiment, the first lens 51 is a convex lens and is circular, and light is emitted from the peripheral edge of the first lens 51. For better and more convenient receiving of the light emitted from the edge of the first lens 51, the light incident surface 12 is connected to the light passing port 11, so that the light emitted from the first light source 30 can be received by the light incident surface 12 while the main portion of the light passes through the light passing port 11. In order to receive more light rays 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 where the second lens 52 is located determines the size of the range of the light emitted from the light-emitting surface 14, and thus determines the light-emitting range of the entire optical system. Further, the size and shape of the projection of the light-emitting surface 14 on the plane where the second lens 52 is located correspond to the size and shape of the second lens 52, respectively, so that the light guide 10 can effectively increase the light-emitting range of the optical system without increasing the volume of the entire 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 disposed between the first light source 30 and the first lens 51, and one or more lenses may be disposed after the second lens 52, which is not particularly limited herein.

The present embodiment further provides a projection System, which includes the optical System as described above, the first light source 30 includes an image generating unit, the image generating unit is a DMD (Digital Micro mirror Device), an MEMS (Micro Electro Mechanical System), an LCOS (Liquid Crystal on Silicon) or an array LED chip, and the projection System provided in the present embodiment has a wide light emitting range. The first light source 30 may be a halogen lamp, a sodium lamp, an incandescent lamp, or the like.

The embodiment further provides a vehicle lamp, which includes the optical system as described above, the first light source is an LED, and the light-emitting range of the vehicle lamp provided by the embodiment 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-motorized vehicle.

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

As shown in fig. 9, this embodiment further provides an optical system operating method, where the optical system is the aforementioned optical system, and the optical system operating 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 area 20;

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 reflection surface 13 to the light emitting surface 14, and then passes out of the light guide 10 from the light emitting surface 14 to continue to be 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 being placed in a light transmission region 20 of an optical system. The light guide includes:

a light incident surface 15 for receiving the light of the second light source 80 and making the light of the second light source 80 enter the light guide 10;

a reflection surface 13 for reflecting the 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 port 11, a light-entering surface 15, a reflecting surface 13 and a light-exiting surface 14, where the light-passing port 11 is used for the light of the first light source 30 to pass through the light guide 10, the light-entering surface 15 is used for the light of the second light source 80 to enter into the light guide 10, the reflecting surface 13 is used for reflecting the light entering into the light guide 10 from the light-entering surface 15, and the light-exiting surface 14 is used for the light reflected from the reflecting surface 13 to pass through the light guide 10 to continue to be transmitted in the light-passing region 20, so that the light of the second light source 80 is guided into the light-passing region 20, and the light-exiting range of the light-passing region 20 is increased.

Specifically, the light guide 10 provided in this embodiment is substantially in a funnel shape with openings at both ends, the light opening 11 is opened at one end with a small opening, and the first light source 30 is disposed opposite to the side of the light opening 11 of the light guide 10. The reflecting surface 13 is located on the outer circumferential surface of the funnel, and the light emitting surface 14 is located on the inner circumferential surface of the funnel.

In this embodiment, as shown in fig. 10, the light-passing opening 11 is formed in the middle of the light guide 10 and is circular, so that the light-passing effect and the light-guiding effect are good. In other embodiments, those skilled in the art can easily understand that other positions of the light guide 10 where the light passing port 11 opens should be within the protection scope of the present application. And in other embodiments, the light passing opening 11 may be an oval, a rectangle or other irregular shape, which is not limited herein.

In the present 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 that is not totally reflected on the reflection surface 13 passes out of the light guide 10 through 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 the 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 view of a light guide of an optical system according to an embodiment of the present disclosure.

As shown in fig. 10 to 12, the light guide 10 provided in the present embodiment operates as follows:

the light of the first light source 30 passes through the light-passing port 11 to continue to be transmitted within the light-passing region 20. The light rays of the second light source 80 enter the light guide 10 from the light entrance surface 15. After the light enters the light guide 10, the light that satisfies the conditions of total reflection on the reflection surface 13 and/or the light-emitting surface 14 is transmitted by total reflection on the reflection surface 13 and/or the light-emitting surface 14, and the light that does not satisfy the conditions of total reflection on the reflection 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, the light will be totally reflected when the included angle θ between the light and the perpendicular line of the reflection surface 13 or the light emitting surface 14 is greater than or equal to arcsin (n) (n is the refractive index of the optically thinner/optically denser medium).

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

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

In other embodiments, the number of the light incident surface 15 may be only one, and the light incident surface is only disposed on one outer edge of the light guide 10, and may be any one of upper, lower, left, and right outer edges. The number of the light incident surfaces 15 may also be two, and the two light incident surfaces are respectively disposed on the upper and lower outer edges. The number of the light incident surfaces 15 may also be three, and the three light incident surfaces are respectively arranged on any three outer edges of the upper edge, the lower edge, the left edge and the right edge of the light guide 10. In other embodiments, the light guide 10 has a light incident surface 15 on the entire peripheral edge thereof, which is not limited herein.

The number of second light sources 80 corresponds to the number of light entry surfaces 15 such that each light entry surface 15 has light to receive. 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. The increase in the number of the second light sources 80 also increases the amount of light to be emitted from the lens assembly 50, thereby increasing the light emitting range of the whole optical system.

Through setting up second light source 80, for example the LED light source, can realize brighter and even illuminating effect through local light filling. In particular, by appropriately setting the number, position, power of the LED light sources and/or the appropriately set microstructure density (the higher the density, the higher the illumination brightness), the brightness can be locally controlled, so that special illumination effects are achieved, for example, in oblique illumination or projection, a uniform brightness can be ensured on the projection surface.

Fig. 13 is a sectional view of a light guide provided in an embodiment of the present application, fig. 14 is a sectional view of a light guide provided in another embodiment of the present application, and fig. 15 is a sectional view of a light guide provided in yet another embodiment of the present application.

Further, the light incident surface 15 is a curved surface, and the cross section of the light incident surface 15 is an arc shape (as shown in fig. 13), a sawtooth shape (as shown in fig. 14), or an array arc shape (as shown in fig. 15). The light incident surface 15 is provided with first or second stripes (similar to the first or

second stripes

121 and 122 in embodiment 1), and the first and second stripes have different inclination angles. In this embodiment, the first lines are horizontal lines, and the second lines are vertical lines.

The cross section of the light incident surface 15 is arc-shaped, saw-tooth-shaped or array arc-shaped, and the light incident surface 12 is provided with a microstructure of first grains or second grains, so that the incident light is homogenized, the light uniformly contains light rays at various angles, and finally the emergent light beam of the light guide 10 is more uniform. The cross section of the light incident surface 15 is arc-shaped or sawtooth-shaped, so that under the same input light energy, the reflection times on the reflecting surface 13 are increased, the reflecting area is enlarged, the uniformity is better, and the volume can be reduced.

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

As shown in fig. 10, the reflective surface 13 is stepped, saw-toothed or wavy, and has a good total reflection effect, and the light guide 10 has a better light guide effect, i.e. under the same input light energy, the reflective surface is set to be stepped, saw-toothed or wavy to increase the reflective frequency, enlarge the reflective area, have a better uniformity, and reduce the volume.

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, which facilitates the installation and use of the light guide 10.

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

a lens unit 50, wherein the light transmission region 20 is arranged in the lens unit 50;

the light of the second light source 80 enters the light guide 10 from the light incident surface 15, is reflected to the light emitting surface 14 by the reflecting surface 13, and then passes out of the light guide 10 from the light emitting surface 14 to continue to be transmitted in the light transmitting area 20.

the light of the first light source 30 passes through the light-passing port 11 to continue to be transmitted within the light-passing region 20. The light rays of the second light source 80 enter the light guide 10 from the light entrance surface 15. After the light enters the light guide 10, the light that satisfies the conditions of total reflection on the reflection surface 13 and/or the light-emitting surface 14 is totally reflected on the reflection surface 13 and/or the light-emitting surface 14, and the light that does not satisfy the conditions of total reflection on the reflection 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, the light will be totally reflected when the included angle θ between the light and the perpendicular line of the reflection surface 13 or the light emitting surface 14 is greater than or equal to arcsin (n) (n is the refractive index of the optically thinner/optically denser medium).

In the optical system provided in this embodiment, the light guide 10 is disposed in the lens assembly 50, the light guide 10 is provided with a light-passing opening 11, a light-entering surface 15, a reflecting surface 13 and a 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, an additional light source (i.e., the second light source 80) is disposed to provide light for the light guide 10, and the light guide 10 guides the additional light into the light-passing area 20 of the lens assembly 50, so as to increase the light-exiting range of the entire optical system.

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. Lens assembly 50 further includes a second lens 52, and second lens 52 is disposed on a side of light guide 10 away from 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 where the second lens 52 is located correspond to the size and shape of the second lens 52, respectively.

The light of the first light source 30 is transmitted out through the first lens 51, and the light is transmitted through the light-passing port 11 and then enters the second lens 52 to continue to be transmitted in the light-passing region 20. The light rays of the second light source 80 enter the light guide 10 from the light entrance surface 15. The light rays meeting the total reflection condition are transmitted on the reflection surface 13 and/or the light emitting surface 14 in a total reflection manner, and the light rays not meeting the total reflection condition are reflected to the light emitting surface 14 by the emission surface 13, penetrate out of the light emitting surface 14 and enter the second lens 52 to be transmitted in the light transmission area 20 continuously. Specifically, the light will be totally reflected when the included angle θ between the light and the perpendicular line of the reflection surface 13 or the light emitting surface 14 is greater than or equal to arcsin (n) (n is the refractive index of the optically thinner/optically denser medium).

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, and the size of the projection of the light emergent surface 14 on the plane where the second lens 52 is located corresponds to the size of the second lens 52, the light guide 10 is approximately funnel-shaped.

One or more lenses may be disposed between the first light source 30 and the first lens 51, and one or more lenses may be disposed after the second lens 52, which is not limited in particular.

The present embodiment further provides a projection system, which includes the optical system as described above, and the first light source 30 includes an image generating unit, where the image generating unit is a DMD, a MEMS, an LCOS, or an array LED chip. The first light source 30 may be a halogen lamp, a sodium lamp, an incandescent lamp, or the like.

The embodiment further provides a vehicle lamp, which includes the optical system, the first light source is an LED, and the light-emitting range of the vehicle lamp provided by the embodiment is large.

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 reflection surface 13 to the light emitting surface 14, and then passes out of the light guide 10 from the light emitting surface 14 to continue to be 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 disclosure, and fig. 17 is a top view of an optical system according to an embodiment of the present disclosure.

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

a light incident surface 16 for receiving the light of the second light source 90 to make the light of the second light source 90 incident into the light guide 10;

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

The light guide 10 provided by this embodiment includes a light-passing port 11, a light-entering surface 16, a reflecting surface 13 and a light-exiting surface 14, where the light-passing port 11 is used for the light of the first light source 30 to pass through the light guide 10, the light-entering surface 16 is used for the light of the second light source 90 to enter into the light guide 10, the reflecting surface 13 is used for reflecting the light entering into the light guide 10 from the light-entering surface 16, and the light-exiting surface 14 is used for the light reflected from the reflecting surface 13 to pass through the light guide 10 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-exiting range of the light-passing region 20 is increased.

In this embodiment, the light-passing opening 11 is opened in the middle of the light guide 10 and is circular, so that the light-passing effect and the light-guiding effect are good. In other embodiments, those skilled in the art can easily understand that other positions of the light guide 10 where the light passing port 11 opens should be within the protection scope of the present application. And in other embodiments, the light passing opening 11 may be an oval, a rectangle or other irregular shape, which is not 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 the light of the first light source 30 located at the edge of the light transmission region 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 two second light incident surfaces 162, the first light incident surface 161 is disposed on an inner peripheral edge of the light passing port 11, the second light incident surfaces 162 are disposed on an outer peripheral 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 and the second light incident surface (162) are disposed opposite to each other. The number of the second light units 92 corresponds to the number of the second light incident surfaces (162). Specifically, the light that is not totally reflected on the reflection surface 13 passes out of the light guide 10 through the light exit surface 14.

In the light guide 10 provided in the present embodiment, the light of the first light source 30 in the non-edge region of the light transmission region 20 passes through the light transmission port 11 to continue to be transmitted in the light transmission region 20. The light rays of the first light source 30 located at the edge of the light transmission region 20, i.e., the light rays of the first light unit 91, enter the light guide 10 from the first light incident surface 161. The light rays of the second light unit 92 enter the light guide 10 from the second light incident surface 162. The light entering the light guide 10, which satisfies the conditions of total reflection on the reflection surface 13 and/or the light-emitting surface 14, is transmitted by total reflection on the reflection surface 13 and/or the light-emitting surface 14, and the light which does not satisfy the conditions of total reflection on the reflection 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, the light will be totally reflected when the included angle θ between the light and the perpendicular line of the reflection surface 13 or the light emitting surface 14 is greater than or equal to arcsin (n) (n is the refractive index of the optically thinner/optically denser medium).

The light incident surface 16 of the light guide 10 provided in this 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 rays at the edge of the light transmitting region 20 of the first light source 30 into the optical system to increase the light emergent range, and the second light incident surface 162 is used for guiding the light rays of the second light unit 92 independent from the first light source 30 into the optical system to increase the overall light emergent 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 rays can be guided into the optical system using the light guide, and the light emitting range of the whole optical system is larger.

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

In other embodiments, the number of the second light incident surface 162 may be only one, and the second light incident surface is only disposed on one outer edge of the light guide 10, and may be any one of upper, lower, left, and right outer edges. The number of the second light incident surfaces 162 may also be two, and the two second light incident surfaces are respectively disposed on the upper and lower outer edges. The number of the second light incident surfaces 162 can also be three, and the three second light incident surfaces are respectively disposed on any three outer edges of the upper edge, the lower edge, the left edge and the right edge of the light guide 10. In other embodiments, the entire peripheral edge of the light guide 10 is provided with the second light incident surface 162, 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 has light rays to receive. 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. The increase in the number of the second light units 92 also increases the light output range of the whole optical system by adding more light to the lens assembly 50.

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 arc-shaped, zigzag-shaped, or array arc-shaped 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 a first grain or a second grain (similar to the first grain 121 and the second grain 122 in embodiment 1), and the inclination angles of the first grain and the second grain are different. In this embodiment, the first lines are horizontal 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 arc-shaped, saw-toothed or array arc-shaped, and the first light incident surface 161 and the second light incident surface 162 are provided with microstructures having first grains or second grains, so that the incident light is homogenized, the light uniformly contains light at various angles, and finally the emergent light beam of the light guide 10 is more uniform. The cross section of the light incident surface 12 is arc-shaped or sawtooth-shaped, so that under the same input light energy, the reflection times on the reflecting surface 13 are increased, the reflecting area is enlarged, the uniformity is better, and the volume can be reduced.

As shown in fig. 16, the reflective surface 13 is stepped, saw-toothed or wavy, so that the total reflection effect is good, and the light guide 10 has a better light guide effect, i.e. under the same input light energy, the reflective surface is set to be stepped, saw-toothed or wavy, so that the reflective frequency can be increased, the reflective area is enlarged, the uniformity is better, and the volume can be reduced.

In the present embodiment, as shown in fig. 1, 4 and 16, the upper and lower sides of the light guide 10 are flat surfaces, which facilitates the installation and use of the light guide 10.

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

in the second light source 90, the light of the second light source 90 enters the light guide 10 from the light incident surface 16, is reflected to the light emitting surface 14 by the reflecting surface 13, and then passes out of the light guide 10 from the light emitting surface 14 to continue to be transmitted in the light passing region 20.

light rays of the first light source 30 located at a non-edge region of the light transmission region 20 pass through the light transmission port 11 to continue to be transmitted within the light transmission region 20. The light rays of the first light source 30 located at the edge of the light transmission region 20 enter the light guide 10 from the first light incident surface 161. The light rays of the second light source 90 enter the light guide 10 from the second light incident surface 162. The light entering the light guide 10, which satisfies the conditions of total reflection on the reflection surface 13 and/or the light-emitting surface 14, is transmitted by total reflection on the reflection surface 13 and/or the light-emitting surface 14, and the light which does not satisfy the conditions of total reflection on the reflection 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, the light will be totally reflected when the included angle θ between the light and the perpendicular line of the reflection surface 13 or the light emitting surface 14 is greater than or equal to arcsin (n) (n is the refractive index of the optically thinner/optically denser medium).

In the optical system provided in this embodiment, the light guide 10 is disposed 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, the first light incident surface 161 is used for guiding the light at the edge of the light transmission region 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 by this embodiment includes two light incident surfaces, and the area for receiving light is large, so that more light can be guided into the optical system, and the light emitting range of the optical system is larger.

The light from the first light source 30 enters the first lens 51, and the light emitted from the non-edge area of the first lens 51 passes through the light-transmitting opening 11 and then enters the second lens 52 to continue to be transmitted in the light-transmitting area 20. The light outgoing from the edge of the first lens 51 enters the light guide 10 from the first light incident surface 161. The light rays of the second light source 90 enter the light guide 10 from the second light incident surface 162. The light rays meeting the total reflection condition are transmitted on the reflection surface 13 and/or the light emitting surface 14 in a total reflection manner, and the light rays not meeting the total reflection condition are reflected to the light emitting surface 14 by the emission surface 13, penetrate out of the light emitting surface 14 and enter the second lens 52 to be transmitted in the light transmission area 20 continuously. Specifically, the light will be totally reflected when the included angle θ between the light and the perpendicular line of the reflection surface 13 or the light emitting surface 14 is greater than or equal to arcsin (n) (n is the refractive index of the optically thinner/optically denser medium).

The edge of the first lens 51 on the side opposite 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 enter the first light incident surface 161, and the light guide 10 can diffuse and transmit the light.

In this embodiment, the first lens 51 is a convex lens and is circular, light rays are emitted from the peripheral edge of the first lens 51, and for better and more conveniently receiving the light rays emitted from the edge of the first lens 51, the first light incident surface 161 is connected to the light through port 11, so that the main portion of the light rays emitted from the first light source 30 passes through the light through port 11 and the light rays emitted from the edge of the first lens 51 can be received by the first light incident surface 161. In order to receive more light rays 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.

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 reflection surface 13 to the light emitting surface 14, and then passes out of the light guide 10 from the light emitting surface 14 to continue to be transmitted in the light passing region 20.

In the description of the present invention, it should be noted that the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" 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 otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; the communication may be direct, indirect via an intermediate medium, or internal to both elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art. In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified.

The present invention is not limited to the above preferred embodiments, and any modifications, equivalent replacements, improvements, etc. within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

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

a light opening (11) for the light of the first light source (30) to pass through the light guide (10);

the light incident surface (12) is used for receiving the light rays of the second light source (40) so as to enable the light rays to be incident into the light guide (10);

a reflecting surface (13) for reflecting the light rays incident into the light guide (10) from the light incident surface (12); and

and the light emitting surface (14) is used for enabling the light rays reflected by the reflecting surface (13) to pass through the light guide (10) so as to be continuously transmitted in the light passing region (20).

2. The light guide (10) according to claim 1, wherein the second light source (40) is formed by light rays of the first light source (30) at the edge of the light transmitting region (20), and the light incident surface (12) is arranged at the inner peripheral edge of the light transmitting opening (11).

3. The light guide (10) of claim 2, wherein the light incident surface (12) is annular.

4. The light guide (10) of claim 1, wherein the second light source (80) is independent of the first light source (30), the light entrance surface (15) is disposed on an outer edge of the light guide (10), and the second light source (80) is disposed opposite the light entrance surface (15).

5. The light guide (10) according to claim 4, wherein 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).

6. The light guide (10) according to claim 2 or 4, wherein the cross section of the light incident surface (12, 15) is a circular arc, a sawtooth or an array circular arc.

7. The light guide (10) according to claim 6, wherein the light incident surface (12, 15) is provided with a first texture (121) or a second texture (122).

8. The light guide (10) of claim 1, wherein the second light source (90) comprises a first light unit (91) and at least a second light unit (92), the first light unit (91) is formed by light rays of the first light source (30) at the edge of the light-transmitting region (20), and the second light unit (92) is a light source independent of the first light source (30);

the light incident surface (16) 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 through port (11), the second light incident surface (162) is arranged on the outer edge of the light guide (10), and the second light unit (92) and the second light incident surface (162) are arranged oppositely.

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) of claim 8, wherein the first light incident surface (161) and the second light incident surface (162) have a cross section of an arc shape, a zigzag shape, or an array arc shape, respectively.