CN118031152A - Optical system for improving lighting uniformity and car lamp and car using same - Google Patents
Optical system for improving lighting uniformity and car lamp and car using same Download PDFInfo
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- CN118031152A CN118031152A CN202410445602.1A CN202410445602A CN118031152A CN 118031152 A CN118031152 A CN 118031152A CN 202410445602 A CN202410445602 A CN 202410445602A CN 118031152 A CN118031152 A CN 118031152A
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- 230000003287 optical effect Effects 0.000 title claims abstract description 39
- 238000009826 distribution Methods 0.000 abstract description 3
- 238000009792 diffusion process Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000003313 weakening effect Effects 0.000 description 2
- 238000003491 array Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 230000002093 peripheral effect Effects 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
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Abstract
The invention relates to the technical field of car lamps, in particular to an optical system for improving the lighting uniformity, a car lamp and a car using the same, wherein the optical system for improving the lighting uniformity comprises a light collimation part, the light collimation part collimates light emitted by a light source, and the light collimation part comprises at least one collimation unit; the light reversing part comprises at least one group of light reversing units, the light reversing units comprise light entering units and light exiting units, the light entering units are used for converging light from the light collimating part, the light exiting units are formed by multiple sections of refracting surfaces, and light cone angles formed by light passing through the end parts of each refracting surface are approximately equal. According to the optical system for improving the lighting uniformity, the emergent light is realized through the multi-section refraction surfaces, and the light cone angles of all the refraction surfaces are approximately equal, so that the light and shade contrast ratio can be weakened, the uneven light distribution is further improved, and the lighting uniformity is improved.
Description
Technical Field
The invention relates to the technical field of car lamps, in particular to an optical system for improving the lighting uniformity, a car lamp using the optical system and a car.
Background
The uniformity of lighting of the signal lamp is an important subjective evaluation direction of the car lamp and is one of the problems which are difficult to solve at present.
A common method for improving uniformity is to make a diffusion pattern on the surface of the light source receiver or make a pattern on other optical elements in the light emitting direction to improve the lighting uniformity. However, this method has a problem in that the optical efficiency is low, and many light rays are emitted at a large angle after initial diffusion, and cannot reach the optical element of the next stage, and the light rays cannot be effectively utilized, resulting in low efficiency. In addition, the effect of weakening the bright and dark areas by only ordinary light diffusion is relatively small, and the problem of uneven lighting still exists.
Therefore, based on the current situation, the inventors propose a solution capable of improving both optical efficiency and lighting uniformity.
Disclosure of Invention
The invention aims to solve the technical problems that: in order to solve the technical problems in the prior art, the invention provides an optical system for improving the lighting uniformity, and a car lamp and a vehicle using the optical system.
The technical scheme adopted for solving the technical problems is as follows: an optical system for improving lighting uniformity comprises a light collimation part, wherein the light collimation part collimates light emitted by a light source, and the light collimation part comprises at least one collimation unit; the light reversing part comprises at least one group of light reversing units, the light reversing units comprise light entering units and light exiting units, the light entering units are used for converging light from the light collimating part, the light exiting units are formed by multiple sections of refracting surfaces, and light cone angles formed by light passing through the end parts of each refracting surface are approximately equal.
According to the optical system for improving the lighting uniformity, the emergent light is realized through the multi-section refraction surfaces, and the light cone angles of all the refraction surfaces are approximately equal, so that the light and shade contrast ratio can be weakened, the uneven light distribution is further improved, and the lighting uniformity is improved.
Further, the optical system for improving the lighting uniformity further includes a light diffusing part that distributes the light from the light reversing part more uniformly.
Further, the light collimation portion, the light reversing portion and the light diffusion portion are sequentially arranged along the optical axis in the forward direction.
Furthermore, the light inlet unit of the light reversing unit is used for converging parallel light, and the converging area is positioned between the light inlet unit and the light outlet unit.
Further, two adjacent light reversing units are symmetrical along the optical axis of the collimating unit.
Further, the refraction surface is a plane or a curved surface.
Further, the light reversing unit is formed by extending the contour line along the normal direction of the plane.
Further, the collimating part adopts a condenser or a lens.
A car lamp comprises the optical system for improving the lighting uniformity.
A vehicle comprises the vehicle lamp.
The invention has the advantages that,
1. The emergent light is realized through the multi-section refraction surfaces, and the light cone angle of each refraction surface is approximately equal, so that the light-dark contrast ratio can be weakened, the uneven light distribution is further improved, and the lighting uniformity is improved;
2. The two adjacent reversing units are symmetrical in the horizontal direction along the collimating unit, so that light is divided into two parts after passing through the collimating unit and enters the two adjacent reversing units respectively, namely, light in the brightest area in the center is dispersed, one part of the light is refracted from the leftmost side of the left reversing unit, one part of the light is refracted from the rightmost side of the right reversing unit, and one part of the light is refracted from the middle sections of the two reversing units, and therefore, light in the brightest area in the middle is finally dispersed into multiple parts to be emitted, the brightness of the middle area is weakened, the brightness of the peripheral area is increased, and the overall lighting uniformity is further improved.
Drawings
The invention will be further described with reference to the drawings and examples.
Fig. 1 is a schematic diagram showing an exemplary structure of an optical system for improving lighting uniformity in the present invention.
Fig. 2 is a schematic plan view of an optical system embodying the present invention for improving the lighting uniformity.
Fig. 3 is a schematic view of light in a horizontal plane of an optical system for improving lighting uniformity in the present invention.
Fig. 4 is a schematic view showing the light cone angle when the refractive surface of the light unit is three-stage in the present invention.
Fig. 5 is a schematic diagram showing two refractive surfaces of a light unit according to the present invention.
In the figure, 1, a light collimation part; 2. a light reversing section; 21. a light-in unit; 22. a light emitting unit; 221. a refractive surface; 3. and a light diffusion section.
Detailed Description
The invention will now be described in further detail with reference to the accompanying drawings. The drawings are simplified schematic representations which merely illustrate the basic structure of the invention and therefore show only the structures which are relevant to the invention.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention. Furthermore, features defining "first", "second" may include one or more such features, either explicitly or implicitly. In the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more. 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 either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between 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.
The invention discloses an optical system for improving lighting uniformity, and a car lamp and a vehicle using the same.
Referring to fig. 1 to 5, an optical system for improving lighting uniformity includes a light collimating section 1, a light reversing section 2, and a light diffusing section 3; the light collimation part 1 is formed by at least one collimation unit array, the collimation unit can be a condenser, a lens, a reflecting mirror or other optical structures capable of collimating 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 is not more than +/-10 degrees.
The light reversing part 2 is formed by a plurality of groups of reversing unit arrays, the reversing units are composed of a light inlet unit 21 and a light outlet unit 22, and the contour line of the light inlet unit 21 in the horizontal plane can collect the light from the collimation part at one point or a certain area; the light-emitting units 22 are composed of a plurality of refractive surfaces 221, the contour line of the light-emitting units 22 in the horizontal plane is symmetrical along the center line of the light-entering units 21 in the horizontal plane, and each light-emitting unit 22 at least comprises two refractive surfaces 221. The contour lines of the light-emitting unit 22 and the light-entering unit 21 in the horizontal plane extend in the vertical direction, together constituting a reversing unit.
The contour line segment of the light-emitting unit 22 in the horizontal plane is defined as 3 segments, namely, a beam of parallel light is divided into A, B, C segments, meanwhile, the light passing through the light-entering unit 21 is defined to be converged at a point O, and after the light emitted from the point O reaches the light-emitting unit 22, the light exchange is realized, namely, the light of the segment A originally positioned at the left side of the center line is refracted from the right side of the center line, and the light of the segment C originally positioned at the right side of the center line is refracted from the left side of the center line. In addition, the cone angles formed by intersecting the reverse extension lines of the end refraction rays passing through each section of light-emitting contour line are respectively alpha, beta and gamma, and the three cone angles are almost equal and have deviation of not more than +/-10 degrees.
It should be noted that the number of the contour lines of the light emitting unit 22 in the horizontal plane may be more than 3, two or other, but the contour lines of the light emitting unit 22 in the horizontal plane need to be symmetric left and right along the contour line of the light entering unit 21, and the two adjacent reversing units need to be symmetric along the optical axis of the collimating unit itself in the horizontal direction.
The light diffusing unit enables a more uniform distribution of the light from the reversing unit.
Working principle: the light-emitting unit 22 of the collimator unit as a condenser and the light-emitting unit 22 of the reversing unit as a 3-segment refractive surface 221 will be specifically described.
The traditional condenser is lighted and has the inner ring which is bright, the outer ring is dark, and a circle of dark area is arranged between the inner ring and the outer ring, so that the lighting effect seen by human eyes is very uneven, in the scheme, two adjacent reversing units are symmetrical along the collimation unit in the horizontal direction, therefore, the light emitted from the center of the condenser is divided into two parts after passing through the collimation unit, and respectively enters the two adjacent reversing units, namely, the light in the brightest area in the center is dispersed, one part is refracted out from the leftmost side of the left reversing unit, one part is refracted out from the rightmost side of the right reversing unit, and one part is refracted out from the middle section of the two reversing units; therefore, the light in the middle brightest region is finally dispersed into multiple parts to be emitted, and the weakening effect is achieved.
In addition, the light cone emitted from the refraction unit of the reversing unit is almost at an angle and is emitted at a certain angle, so that the light and dark contrast ratio is further weakened compared with the light and dark contrast ratio; finally, the light diffusion unit is used for further uniformly lighting the effect.
In a second aspect, a vehicle lamp is disclosed.
A car lamp comprises the optical system for improving the lighting uniformity.
In a third aspect, the present disclosure is directed to a vehicle.
A vehicle comprises the vehicle lamp.
With the above-described preferred embodiments according to the present invention as an illustration, the above-described descriptions can be used by persons skilled in the relevant art to make various changes and modifications without departing from the scope of the technical idea of the present invention. The technical scope of the present invention is not limited to the description, but must be determined according to the scope of claims.
Claims (10)
1. An optical system for improving lighting uniformity, comprising
A light collimating part (1), the light collimating part (1) collimates light emitted by a light source, the light collimating part (1) comprising at least one collimating unit;
The light reversing part (2) comprises at least one group of light reversing units, the light reversing units comprise a light entering unit (21) and a light exiting unit (22), the light entering unit (21) gathers light from the light collimating part (1), the light exiting unit (22) is composed of a plurality of sections of refracting surfaces (221), and light cone angles formed by light rays passing through the end parts of each refracting surface (221) are approximately equal.
2. An optical system for improving lighting uniformity according to claim 1, characterized in that said optical system for improving lighting uniformity further comprises a light diffusing part (3), said light diffusing part (3) distributing the light from the light reversing part (2) more uniformly.
3. An optical system for improving lighting uniformity according to claim 2, characterized in that said light collimating part (1), light reversing part (2), light diffusing part (3) are arranged in order in forward direction along the optical axis.
4. An optical system for improving lighting uniformity according to claim 1, characterized in that the light entrance unit (21) of the light reversing unit implements a collection of parallel light, the collection area being located between the light entrance unit (21) and the light exit unit (22).
5. The optical system for improving lighting uniformity according to claim 1, wherein adjacent two of said light reversing units are symmetrical along the optical axis of the collimating unit itself.
6. An optical system for improving lighting uniformity as claimed in claim 1, characterized in that said refractive surface (221) is a plane or a curved surface.
7. The optical system for improving lighting uniformity according to claim 1, wherein said light reversing unit is formed by extending a contour line along a normal direction of a plane in which said contour line is located.
8. The optical system for improving lighting uniformity according to claim 1, wherein said collimating section employs a condenser or a lens.
9. A vehicle lamp comprising the optical system for improving lighting uniformity of any one of claims 1 to 8.
10. A vehicle comprising the vehicle lamp of claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410445602.1A CN118031152A (en) | 2024-04-15 | 2024-04-15 | Optical system for improving lighting uniformity and car lamp and car using same |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202410445602.1A CN118031152A (en) | 2024-04-15 | 2024-04-15 | Optical system for improving lighting uniformity and car lamp and car using same |
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| CN220269195U (en) * | 2023-08-28 | 2023-12-29 | 常州星宇车灯股份有限公司 | Optical coupling structure for improving lighting effect |
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