Optical system for improving lighting uniformity and vehicle lamp and vehicle using the same

Abstract

This utility model relates to the field of automotive lighting technology, and more particularly to an optical system for improving illumination uniformity, and automotive lights and vehicles using the same. The optical system for improving illumination uniformity includes a collimator that collimates light emitted from a light source, and the collimator includes at least one collimating unit; and a light commutation unit, including at least one set of light commutation units, each light commutation unit including an incident light unit and an exiting light unit. The incident light unit converges light from the collimator, and the exiting light unit is composed of multiple refractive surfaces, with the light cone angle formed by the light rays passing through the ends of each refractive surface being approximately equal. This optical system for improving illumination uniformity achieves light emission through multiple refractive surfaces. Because the light cone angle of each refractive surface is approximately equal, it can weaken the contrast between light and dark areas, thereby improving uneven light distribution and enhancing illumination uniformity.

Description

Technical Field

[0001] This utility model relates to the field of vehicle lighting technology, and in particular to an optical system for improving the uniformity of illumination, as well as vehicle lights and vehicles using the same. Background Technology

[0002] The uniformity of signal light illumination is an important subjective evaluation aspect of vehicle lights, and it is also one of the more difficult problems to solve at present.

[0003] A common method to improve uniformity is to create diffusion patterns on the surface of the light source receiver or on other optical elements in the light emission direction. However, this method has the problem of low optical efficiency. Many rays, after initial diffusion, exit at large angles and fail to reach the next stage of optical elements, resulting in inefficient light utilization and low efficiency. Furthermore, ordinary light diffusion alone has limited effect on weakening bright and dark areas, and uneven illumination still exists.

[0004] Therefore, based on the current situation, the inventor has proposed a solution that can improve both optical efficiency and illumination uniformity. Utility Model Content

[0005] The technical problem to be solved by this utility model is: in order to solve the technical problems in the prior art, this utility model provides an optical system for improving the uniformity of illumination and vehicle lights and vehicles using the same.

[0006] The technical solution adopted by this utility model to solve its technical problem is: an optical system for improving the uniformity of illumination, including a light collimation section, which collimates the light emitted by the light source, and the light collimation section includes at least one collimation unit; and a light switching section, including at least one set of light switching units, the light switching unit including an input light unit and an output light unit, the input light unit converging the light from the light collimation section, and the output light unit being composed of multiple refractive surfaces, the light cone angle formed by the light rays passing through the ends of each refractive surface being approximately equal.

[0007] The optical system for improving illumination uniformity of this invention achieves light emission through multiple refractive surfaces. Since the light cone angle of each refractive surface is approximately equal, it can weaken the contrast between light and dark, thereby improving uneven light distribution and enhancing illumination uniformity.

[0008] Furthermore, the optical system for improving illumination uniformity also includes a light diffusion section, which makes the light from the light reversal section more evenly distributed.

[0009] Furthermore, the optical collimation section, the optical reversal section, and the optical diffusion section are arranged sequentially along the positive direction of the optical axis.

[0010] Furthermore, the incident light unit of the optical switching unit realizes the convergence of parallel light, and the convergence region is located between the incident light unit and the output light unit.

[0011] Furthermore, two adjacent optical commutation units are symmetrical along the optical axis of the collimation unit itself.

[0012] Furthermore, the refracting surface is either a plane or a curved surface.

[0013] Furthermore, the light commutation unit is formed by extending the contour line along the normal of the plane in which it is located.

[0014] Furthermore, the collimation section employs a condenser or a lens.

[0015] A vehicle headlight, including the aforementioned optical system for improving illumination uniformity.

[0016] A vehicle including the aforementioned headlights.

[0017] The beneficial effects of this utility model are:

[0018] 1. Light is emitted through multiple refractive surfaces. Since the light cone angle of each refractive surface is approximately equal, the contrast between light and dark can be weakened, thereby improving the uneven distribution of light and enhancing the uniformity of illumination.

[0019] 2. This application adopts an optical structure that is used in pairs along the optical path. Because the light-incident part is not uniform, after passing through the optical structure of this application, the energy distribution of the corresponding area can be improved by energy exchange, so that the strong parts are reduced and the weak parts are enhanced. At the same time, this application disperses the light of the brightest area in the middle into multiple parts, which reduces the brightness of the middle area and increases the brightness of the outer area, thereby improving the overall lighting uniformity.

[0020] 3. The two adjacent commutation units are symmetrical in the horizontal direction along the collimation unit. Therefore, after the light passes through the collimation unit, it is divided into two parts and enters the two adjacent commutation units respectively. That is, the light in the brightest central region is dispersed. One part is refracted from the leftmost side of the left commutation unit, one part is refracted from the rightmost side of the right commutation unit, and one part is refracted from the middle section of the two commutation units. Therefore, the light in the brightest central region is finally dispersed into multiple parts, which reduces the brightness of the central region and increases the brightness of the outer region, thereby improving the overall lighting uniformity. Attached Figure Description

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0022] Figure 1 This is a schematic diagram of a typical structure of an optical system that embodies the improvement of illumination uniformity in this utility model.

[0023] Figure 2This is a planar schematic diagram of the optical system that embodies the improvement of illumination uniformity in this utility model.

[0024] Figure 3 This is a schematic diagram of the light principle of the optical system for improving illumination uniformity in the horizontal plane.

[0025] Figure 4 This is a schematic diagram illustrating the light cone angle when the refractive surface of the light unit is in three segments, as described in this utility model.

[0026] Figure 5 This is a schematic diagram illustrating that the refractive surface of the optical unit is divided into two segments in this utility model.

[0027] In the diagram: 1. Light collimation section; 2. Light reversal section; 21. Entrance light unit; 22. Exit light unit; 221. Refraction surface; 3. Light diffusion section. Detailed Implementation

[0028] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0029] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more. In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0030] This utility model discloses an optical system for improving illumination uniformity, as well as vehicle lights and vehicles using the same.

[0031] Reference Figures 1 to 5 An optical system for improving illumination uniformity includes a light collimation section 1, a light reversal section 2, and a light diffusion section 3. The light collimation section 1 is formed by an array of at least one collimation unit. The collimation unit can be a condenser, a lens, a mirror, or other optical structure that can collimate the light emitted by the light source into parallel light or approximately parallel light, and the deviation angle between the approximately parallel light and the parallel light does not exceed ±10°.

[0032] The light commutation unit 2 is formed by an array of multiple commutation units. Each commutation unit consists of an input light unit 21 and an output light unit 22. The outline of the input light unit 21 in the horizontal plane can converge the light from the collimator to a point or a certain area. The output light unit 22 is composed of multiple refractive surfaces 221. The outline of the output light unit 22 in the horizontal plane is symmetrical along the center line of the input light unit 21 in the horizontal plane. Each output light unit 22 includes at least two refractive surfaces 221. The outlines of the output light unit 22 and the input light unit 21 in the horizontal plane extend in the vertical direction, together forming the commutation unit.

[0033] The outline of the light-emitting unit 22 in the horizontal plane is defined as three segments, that is, a beam of parallel light is divided into three segments A, B, and C. Simultaneously, the light rays passing through the incident light unit 21 converge at point O. The light rays emanating from point O reach the light-emitting unit 22, where an exchange of light occurs: segment A, originally located to the left of the center line, is refracted to the right of the center line, and segment C, originally located to the right of the center line, is refracted to the left of the center line. Furthermore, the light cone angles formed by the intersection of the backward extensions of the refracted light rays at the ends of each light-emitting outline segment are defined as α, β, and γ, respectively. These three light cone angles are approximately the same, with a deviation not exceeding ±10°.

[0034] This application divides the light-emitting surface unit 22 into several refractive surfaces 221. Each refractive surface 221 has a focal point, and the light rays from each refractive surface 221 are emitted along the main light-emitting direction. Thus, each refractive surface 221 has light rays emitted from the observation angle, which fully ensures uniformity and improves the energy utilization rate of the main light-emitting direction.

[0035] It should be noted that the number of contour segments of the light-emitting unit 22 in the horizontal plane can be more than three; it can also be two or other segments. However, in the horizontal plane, the contour line of the light-emitting unit 22 needs to be symmetrical about the contour line of the light-incident unit 21, and two adjacent reversing units need to be symmetrical about the optical axis of the collimating unit itself in the horizontal direction. By dividing the light-emitting unit 22 into two or three equal regions, and ensuring that their respective main emission directions remain unchanged, approximately equal lateral diffusion is achieved. After superposition, the energy distribution in each direction will be more consistent, and the uniformity will be significantly improved, resulting in better uniformity in all observation directions.

[0036] The light diffusion unit enables a more uniform distribution of light from the commutation unit.

[0037] Working principle: Taking the collimation unit as a concentrator and the light-emitting unit 22 of the commutation unit as a three-segment refractive surface 221 as an example, the working principle will be explained in detail.

[0038] Traditional condensers exhibit uneven illumination, with the inner ring brighter than the outer ring, and a dark area between them. This results in a highly uneven lighting effect as perceived by the human eye. In this design, adjacent commutation units are symmetrically positioned horizontally along the collimation unit. Consequently, the light emitted from the center of the condenser is split into two parts after passing through the collimation unit, entering the two adjacent commutation units respectively. This disperses the light from the brightest central area, with one part refracting from the far left of the left commutation unit, one part from the far right of the right commutation unit, and one part from the middle section between the two commutation units. Therefore, the light from the brightest central area is ultimately dispersed into multiple parts, achieving a light reduction effect.

[0039] In addition, the light cone angle emitted from the refraction unit of the commutation unit is approximately the same, and it is emitted at a certain angle, thus further weakening the contrast between light and dark compared to the above; finally, through the light diffusion unit, the lighting effect is further uniform.

[0040] Secondly, this utility model discloses a vehicle lamp.

[0041] A vehicle headlight, including the aforementioned optical system for improving illumination uniformity.

[0042] Thirdly, this utility model discloses a vehicle.

[0043] A vehicle including the aforementioned headlights.

[0044] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. An optical system for improving illumination uniformity, characterized in that, include The light collimation unit (1) collimates the light emitted by the light source, and the light collimation unit (1) includes at least one collimation unit; The light switching section (2) includes at least one set of light switching units, the light switching unit includes an input light unit (21) and an output light unit (22). The input light unit (21) converges the light from the light collimator (1), and the output light unit (22) is composed of multiple refractive surfaces (221). The light cone angle formed by the light rays passing through the ends of each refractive surface (221) is approximately equal.

2. The optical system for improving illumination uniformity according to claim 1, characterized in that, The optical system for improving illumination uniformity also includes a light diffusion section (3), which makes the light from the light reversal section (2) more evenly distributed.

3. The optical system for improving illumination uniformity according to claim 2, characterized in that, The optical collimation section (1), optical reversal section (2), and optical diffusion section (3) are arranged sequentially along the positive direction of the optical axis.

4. The optical system for improving illumination uniformity according to claim 1, characterized in that, The light-incident unit (21) of the light-commutation unit realizes the convergence of parallel light, and the convergence area is located between the light-incident unit (21) and the light-outcident unit (22).

5. The optical system for improving illumination uniformity as described in claim 1, characterized in that, The two adjacent optical commutation units are symmetrical along the optical axis of the collimation unit itself.

6. The optical system for improving illumination uniformity as described in claim 1, characterized in that, The refractive surface (221) is either a plane or a curved surface.

7. The optical system for improving illumination uniformity as described in claim 1, characterized in that, The optical commutation unit is formed by extending the contour line along the normal of the plane it is located in.

8. The optical system for improving illumination uniformity as described in claim 1, characterized in that, The collimation section employs a condenser or a lens.

9. A vehicle light, characterized in that, The optical system for improving illumination uniformity as described in any one of claims 1-8.

10. A vehicle, characterized in that, Includes the vehicle lights as described in claim 9.

Images