CN108916805B - Car light lens - Google Patents
Car light lens Download PDFInfo
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- CN108916805B CN108916805B CN201710171979.2A CN201710171979A CN108916805B CN 108916805 B CN108916805 B CN 108916805B CN 201710171979 A CN201710171979 A CN 201710171979A CN 108916805 B CN108916805 B CN 108916805B
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- light
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V5/00—Refractors for light sources
- F21V5/04—Refractors for light sources of lens shape
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
Abstract
A car lamp lens is suitable for transmitting light rays of a light emitting piece and comprises a light incident surface, a light emergent surface and a reflecting surface, wherein the light incident surface faces the light emitting piece. The light emergent surface and the light incident surface are arranged at intervals along the optical axis. The reflecting surface extends from the light incident surface to the light emergent surface and surrounds the optical axis, the reflecting surface is provided with a plurality of reflecting sections capable of totally reflecting incident light and a plurality of optical structures for destroying the light to generate total reflection, and a break difference exists between any two adjacent reflecting sections. The optical structure is arranged on the reflecting surface, so that the total reflection of light rays can be damaged, the light rays which are not needed are prevented from being emitted from the light emitting surface, the residual light can be reduced, and the influence of glare on passers-by can be avoided, thereby improving the driving safety.
Description
Technical Field
The invention relates to a lens, in particular to a lens for a vehicle lamp.
Background
A vehicle lamp is known, which reflects a light source of a light source forward mainly through a lamp cover of the vehicle lamp. The lamp cover has a reflective surface, which is usually formed by a vacuum coating process. However, the temperature of the vacuum coating process is high, so the material selection of the lampshade is greatly limited, and the bonding between the coating and the lampshade body must be considered. In addition, the vacuum coating is prone to the problem of uneven coating film thickness, so that the precision of optical reflection is affected, errors exist between the light shape after light is emitted and the light shape of the original design, the reflectivity is also affected, and then high light loss is caused. Therefore, there is a car light lens design that uses the Total Internal Reflection (TIR) principle to make light pass through the car light lens, then be totally reflected by a reflecting surface of the car light lens, and then be emitted from a light-emitting surface of the car light lens. At present, theoretical calculation is carried out, the reflectivity theoretical value of the car lamp lens can reach 100%, so that the design of the TIR car lamp lens can reduce the light loss rate and improve the optical precision compared with the reflection of a lampshade adopting a vacuum coating film.
For example, taiwan patent certificate number I491833 provides a vehicular lighting lamp lens, which includes a lighting source and a collimating lens, wherein the collimating lens guides light of the lighting source out through TIR principle. However, it is found in practice that the light projected by the TIR lens forms unwanted residual light in a partial area on the illumination plane, which causes glare and affects safety of passers-by, and for example, in a near light, residual light is generated in an area above a cut-off line (cut-off line), which is a problem to be improved.
Disclosure of Invention
The invention aims to provide a vehicle lamp lens capable of reducing residual light and improving driving safety.
The lens for the vehicle lamp is suitable for transmitting light rays of a light-emitting piece, and comprises a light incident surface, a light emergent surface and a reflecting surface, wherein the light incident surface faces the light-emitting piece. The light incident surface comprises a light incident surrounding surface part surrounding an optical axis extending from front to back, and a light incident end surface part connected to the front end of the light incident surrounding surface part and positioned on the optical axis, the light emergent surface is arranged at intervals along the optical axis and the light incident surface, the reflecting surface extends from the light incident surface to the light emergent surface and surrounds the optical axis, the reflecting surface is provided with a plurality of reflecting sections capable of totally reflecting incident light, and a plurality of optical structures used for destroying the light to generate total reflection, and a break difference is formed between any two adjacent reflecting sections.
The reflecting surface of the lens for the vehicle lamp comprises two first reflecting parts which are spaced from each other at left and right, and a second reflecting part which is connected between the bottom edges of the first reflecting parts, wherein the optical structure is formed on the second reflecting part.
According to the vehicle lamp lens, the optical structures are arranged in front and back and extend in the left-right longitudinal direction, and each optical structure defines a groove extending in the left-right direction.
Each optical structure of the vehicle lamp lens is provided with a light facing surface facing backwards and allowing light rays of the light-emitting piece to pass through, and a forward backlight surface, wherein the light facing surface of one optical structure is adjacent to the backlight surface of the other optical structure between any two adjacent optical structures.
According to the vehicle lamp lens, an acute included angle between the extending direction of the light facing surface of each optical structure and the extending direction of the optical axis is larger than 18 degrees.
The optical structure of the lens for a vehicle lamp of the present invention is a texture for diffusing the light of the light emitting member.
The light-emitting surface comprises an annular surface part and a central surface part, wherein the annular surface part is connected with the reflecting surface and surrounds the optical axis, the central surface part is positioned on the optical axis and is surrounded by the annular surface part, the central surface part is a curved surface, the annular surface part can be used for light rays entering from the light-entering annular surface part of the light-entering surface and reflected by the reflecting surface to pass through, and the central surface part can be used for light rays entering from the light-entering end surface part of the light-entering surface to pass through.
According to the vehicle lamp lens, the annular surface part of the light-emitting surface is a plane.
The invention has the beneficial effects that: the optical structure is arranged on the reflecting surface, so that the total reflection of light rays can be damaged, the light rays which are not needed are prevented from being emitted from the light emitting surface, the residual light can be reduced, and the influence of glare on passers-by can be avoided, thereby improving the driving safety.
Drawings
Other features and effects of the present invention will become apparent from the following detailed description of the embodiments with reference to the accompanying drawings, in which:
FIG. 1 is a perspective view of one embodiment of a lens for a vehicle lamp according to the present invention;
FIG. 2 is a bottom perspective view of the embodiment;
FIG. 3 is a side view of the embodiment;
FIG. 4 is a side cross-sectional view illustrating the path of light;
fig. 5 is a top cross-sectional view taken along line 5-5 of fig. 3 illustrating the light path.
Detailed Description
Referring to fig. 1 to 4, an embodiment of the lens for a vehicle lamp according to the present invention is suitable for transmitting light of a light emitting element 9 of a vehicle lamp, where the light emitting element 9 is, for example, a Light Emitting Diode (LED). The lens for the car light is made of a light-permeable resin material and comprises a light incident surface 1, a light emergent surface 2 and a reflecting surface 3.
The light incident surface 1 faces the light emitting element 9, and includes a light incident surrounding surface portion 11 surrounding an optical axis L extending in a front-back direction, and a light incident end surface portion 12 connected to a front end of the light incident surrounding surface portion 11 and located on the optical axis L, wherein the light incident end surface portion 12 and the light incident surrounding surface portion 11 together define a light conduction space 10.
The light emitting surface 2 and the light incident surface 1 are arranged at intervals along the optical axis L. The light-emitting surface 2 includes an annular surface portion 21 connected to the front end of the reflecting surface 3 and surrounding the optical axis L, and a central surface portion 22 located on the optical axis L and surrounded by the annular surface portion 21. The annular surface portion 21 is a smooth surface without any pattern on the surface, and the annular surface portion 21 is a plane. The top of the central surface 22 is concave toward the light incident surface 1 relative to the annular surface 21, the bottom of the central surface 22 is convex forward relative to the annular surface 21, and the central surface 22 is a curved surface with an arc and has a plurality of blocks with different curvatures.
The reflection surface 3 extends from the light incident surface 1 to the light emitting surface 2 and surrounds the optical axis L, and includes two first reflection portions 31 spaced left and right, a second reflection portion 32 connected between bottom edges of the first reflection portions 31, and a third reflection portion 33 connected between top edges of the first reflection portions 31. Each first reflection portion 31 has a plurality of reflection segments 311 capable of totally reflecting incident light, and there is a break between any two adjacent reflection segments 311 on each first reflection portion 31. The second reflecting portion 32 has two first bottom segments 321 spaced from each other at left and right sides, a second bottom segment 322 located between the first bottom segments 321 and having a height lower than that of the first bottom segment 321, two third bottom segments 323 extending from the left and right sides of the second bottom segment 322 to the first bottom segment 321 at the same side, and a plurality of optical structures 34 for breaking light rays to generate total reflection.
The optical structures 34 are arranged in a front-back manner and extend in the left-right longitudinal direction, and each optical structure 34 defines a groove 35 extending in the left-right longitudinal direction. Each optical structure 34 extends over the first bottom section 321, the second bottom section 322 and the third bottom section 323, and has a light facing surface 341 facing backward and allowing light of the light emitting element 9 to pass through, and a back light facing surface 342 facing forward. Between any two adjacent optical structures 34, the light-facing surface 341 of one is adjacent to the backlight surface 342 of the other. The light-facing surface 341 of each optical structure 34 is gradually inclined upward from back to front, and an acute angle θ between the extending direction of the light-facing surface 341 and the extending direction of the optical axis L is preferably greater than 18 degrees, so as to generate a better function of total reflection destruction, and if the angle is less than or equal to 18 degrees, the effect of total reflection destruction is slightly poor, so that a dark area above a cut-off line of light and shade may still generate glare.
Referring to fig. 1, 4 and 5, when the present invention is used, part of the light emitting element 9 enters the lens of the vehicle lamp from the light incident peripheral surface portion 11 (as shown by the path of arrow A, B), and part of the light enters the lens of the vehicle lamp from the light incident end portion 12 (as shown by the path of arrow C). The light emitted to the light-entering end portion 12 can generate a light-gathering effect by the design of the light-entering end portion 12 being curved backward, and go forward toward the light-exiting surface 2 in a direction substantially parallel to the optical axis L, and then be emitted forward through the central portion 22 of the light-exiting surface 2. The part of the light is substantially the light which is not reflected and is emitted forwards.
On the other hand, the light emitted from the light emitting element 9 through the light entrance surface 11 and entering the lens of the vehicular lamp can be divided into the first reflecting portion 31 and the third reflecting portion 33 (arrow a) which are directed to the reflecting surface 3 and the second reflecting portion 32 (arrow B). The light rays of the arrow a can be reflected (mostly totally internally reflected) by the first reflection portion 31 and the third reflection portion 33 and then emitted out through the light emitting surface 2, and the light rays of this portion are substantially emitted out from the annular surface portion 21 of the light emitting surface 2, so as to form uniform light emitting rays. In the present invention, the light emitted from the central portion 22 and the light emitted from the annular portion 21 by reflection can be matched with each other, so as to form a light shape conforming to the regulations on a projection surface in front of the lens of the vehicular lamp, and a cut-off line (cut-off line) is formed at a proper position.
Furthermore, since the reflecting surface 3 of the present invention is provided with the optical structure 34, and the structure, surface design, arrangement, etc. of the optical structure 34 can be used to destroy the total reflection of light, the light (as indicated by arrow B) emitted by the light emitting element 9 toward the optical structure 34 is reflected by the light facing surface 341 and most of the light is reflected by the light facing surface 341 after being emitted to the light facing surface 341 of the optical structure 34, and this design is intended to ensure that if the optical structure 34 is not provided, most of the light emitted to the second reflecting portion 32 is totally reflected and emitted toward the light emitting surface 2, and the light emitting angle is slightly upward, so that the residual light is generated in the area above the cut-off line, which can be glare and affect passers-by. The light is refracted and emitted through the optical structure 34, even if some light is still reflected by the optical structure 34 and emitted toward the light emitting surface 2, the intensity of the residual light emitted from the light emitting surface 2 can be reduced because of the non-total reflection.
It should be noted that the optical structure 34 of the present embodiment can be formed by machining with an NC machine, and the optical structure 34 formed by such machining refracts the incident light out of the lens through the light-facing surface 341, thereby achieving the effect of reducing the excessive light. On the other hand, the optical structure 34 of the present invention can be made by other methods, for example, by using a texture which can diffuse the light of the light emitting member 9, thereby achieving the purpose of destroying the total reflection of the light and reducing the residual light. The texture is mainly formed by wet etching the second reflection portion 32 of the reflection surface 3 to form a rough surface on the second reflection portion 32, and the wet etched surface is substantially white fog. The optical structure 34 formed by the NC machine shows the distinct groove 35, and the second reflection portion 32 still shows the original clear color of the lens. In addition, the present invention does not need to limit the optical structure 34 to be located in the second reflection portion 32, and the optical structure 34 may be provided in other positions on the reflection surface 3 as well as in an area where the excessive light is reduced as needed.
It should be noted that the curvature of each reflection section 311 of the reflection surface 3 is different, and can provide a proper reflection function by matching with the light rays with different incident angles, so that various different light reflection angles and paths can be increased to obtain a light shape with uniform diffusion, and the reflected light rays emitted from the ring surface portion 21 can be projected below the cutoff line, thereby preventing the upper side of the cutoff line from being too bright to meet the regulations. In addition, the curvature design of the reflecting segment 311 can be used to adjust the horizontal extension range of the optical field, so that the optical field can be stretched and enlarged to the left and right.
In addition, by changing the curvature of the central surface 22 of the light output surface 2, the left and right sides of the light range can be stretched more, which is also helpful for adjusting the position of the cutoff line. It is found through experiments that if the central surface portion 22 is designed to be a plane rather than a curved surface, there is an excessive light generated at the position of the cutoff line, which results in the projected light shape not meeting the requirements of the regulations, so the central surface portion 22 must be designed to be a curved surface. The invention can effectively adjust the paths of the reflected light and the direct light by matching various curvatures of the reflecting section 311 with the curvatures of the central face part 22, and control the light saturation, the uniformity, the light shape and the light and dark cut-off line position of the emergent light, thereby improving the optical precision. It should be noted that in the design spirit of the light emitting surface 2 of the present invention, the central surface portion 22 and the annular surface portion 21 have different curvatures, or the two portions are in tandem, so that the light emitting surface 2 can form two different blocks (i.e., the annular surface portion 21 and the central surface portion 22).
In summary, by disposing the optical structure 34 on the reflective surface 3, total reflection of light can be destroyed, and unwanted light can be prevented from being emitted from the light-emitting surface 2, so as to reduce residual light and prevent pedestrians from being affected by glare, thereby improving driving safety.
The above description is only an example of the present invention, and the scope of the present invention should not be limited thereby, and the invention is still within the scope of the present invention by simple equivalent changes and modifications made according to the claims and the contents of the specification.
Claims (6)
1. A car light lens is suitable for transmitting light of a light-emitting piece and comprises a light-in surface, a light-out surface and a reflecting surface, wherein the light-in surface comprises a light-in surrounding surface part surrounding an optical axis extending from front to back, and a light-in end surface part connected to the front end of the light-in surrounding surface part and positioned on the optical axis, the light-out surface and the light-in surface are arranged at intervals along the optical axis, the reflecting surface extends from the light-in surface to the light-out surface and surrounds the optical axis, the reflecting surface is provided with a plurality of reflecting sections capable of totally reflecting the incident light and a plurality of optical structures for destroying the light to generate total reflection, a break difference is formed between any two adjacent reflecting sections, the reflecting surface comprises two first reflecting parts spaced from left to right and a second reflecting part connected between the bottom edges of the first reflecting parts, the optical structures are formed on the second reflection part, each first reflection part is provided with a plurality of reflection sections capable of totally reflecting incident light, each optical structure is provided with a light facing surface facing backwards and allowing the light of the light-emitting piece to pass through, and a light facing surface facing forwards, and between any two adjacent optical structures, the light facing surface of one optical structure is connected with the light facing surface of the other optical structure.
2. The vehicular lamp lens according to claim 1, characterized in that: the optical structures are arranged in a front-back mode and extend in the left-right direction, and each optical structure defines a groove extending in the left-right direction.
3. The vehicular lamp lens according to claim 1, characterized in that: an acute included angle between the extending direction of the light-facing surface of each optical structure and the extending direction of the optical axis is larger than 18 degrees.
4. The vehicular lamp lens according to claim 1, characterized in that: the optical structure is a texture for diffusing light of the light emitting member.
5. The vehicular lamp lens according to claim 1, characterized in that: the light exit surface comprises an annular surface part and a central surface part, the annular surface part is connected with the reflecting surface and surrounds the optical axis, the central surface part is positioned on the optical axis and is surrounded by the annular surface part, the central surface part is a curved surface, the annular surface part can be used for light entering from the light entrance surrounding surface part of the light entrance surface and reflected by the reflecting surface to pass through, and the central surface part can be used for light entering from the light entrance end surface part of the light entrance surface to pass through.
6. The vehicular lamp lens according to claim 5, characterized in that: the annular surface part of the light-emitting surface is a plane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710171979.2A CN108916805B (en) | 2017-03-22 | 2017-03-22 | Car light lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710171979.2A CN108916805B (en) | 2017-03-22 | 2017-03-22 | Car light lens |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108916805A CN108916805A (en) | 2018-11-30 |
| CN108916805B true CN108916805B (en) | 2021-03-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710171979.2A Active CN108916805B (en) | 2017-03-22 | 2017-03-22 | Car light lens |
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| CN (1) | CN108916805B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113339748B (en) * | 2020-02-18 | 2023-07-28 | 堤维西交通工业股份有限公司 | Car light device |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102006053020A1 (en) * | 2006-11-10 | 2008-05-15 | Hella Kgaa Hueck & Co. | Lens for vehicle headlight, has lens body with light input face for feeding light emitted by light source, where arc-shaped light output face is provided for decoupling of light |
| CN102901043A (en) * | 2012-07-10 | 2013-01-30 | 华南理工大学 | Optical lens with free-form surfaces for LED dipped headlight of motorcycle |
| CN103511978A (en) * | 2012-06-29 | 2014-01-15 | 欧司朗股份有限公司 | Lens, illuminating device and light box |
| CN103672664A (en) * | 2012-09-26 | 2014-03-26 | 中强光电股份有限公司 | Lighting device for vehicle |
| CN105299558A (en) * | 2014-06-11 | 2016-02-03 | 齐扎拉光系统有限责任公司 | Illumination device for vehicles |
| TWM524427U (en) * | 2015-10-19 | 2016-06-21 | Tyc Brother Ind Co Ltd | Multiple reflection surface TIR lens optical structure for high-low beam lamp |
| CN205859852U (en) * | 2016-08-02 | 2017-01-04 | 法雷奥照明湖北技术中心有限公司 | Photo-patterning device and illumination and/or signal designation equipment |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4825140B2 (en) * | 2007-01-15 | 2011-11-30 | 株式会社小糸製作所 | Vehicle lighting |
| JP5445923B2 (en) * | 2009-09-04 | 2014-03-19 | スタンレー電気株式会社 | Vehicle lighting |
| CN102606977B (en) * | 2012-03-31 | 2014-05-07 | 华南理工大学 | Optical lens with free-form surfaces for LED automobile headlight |
| JP2014032174A (en) * | 2012-07-13 | 2014-02-20 | Ricoh Co Ltd | Imaging device, attachment detection device, apparatus control system for transfer device, and transfer device |
| DE102014205994B4 (en) * | 2014-03-31 | 2023-02-02 | Automotive Lighting Reutlingen Gmbh | Light module with semiconductor light source and attachment optics and motor vehicle headlight with such a light module |
| CN204100133U (en) * | 2014-08-11 | 2015-01-14 | 敏翔股份有限公司 | Lens of car light structure |
-
2017
- 2017-03-22 CN CN201710171979.2A patent/CN108916805B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102006053020A1 (en) * | 2006-11-10 | 2008-05-15 | Hella Kgaa Hueck & Co. | Lens for vehicle headlight, has lens body with light input face for feeding light emitted by light source, where arc-shaped light output face is provided for decoupling of light |
| CN103511978A (en) * | 2012-06-29 | 2014-01-15 | 欧司朗股份有限公司 | Lens, illuminating device and light box |
| CN102901043A (en) * | 2012-07-10 | 2013-01-30 | 华南理工大学 | Optical lens with free-form surfaces for LED dipped headlight of motorcycle |
| CN103672664A (en) * | 2012-09-26 | 2014-03-26 | 中强光电股份有限公司 | Lighting device for vehicle |
| CN105299558A (en) * | 2014-06-11 | 2016-02-03 | 齐扎拉光系统有限责任公司 | Illumination device for vehicles |
| TWM524427U (en) * | 2015-10-19 | 2016-06-21 | Tyc Brother Ind Co Ltd | Multiple reflection surface TIR lens optical structure for high-low beam lamp |
| CN205859852U (en) * | 2016-08-02 | 2017-01-04 | 法雷奥照明湖北技术中心有限公司 | Photo-patterning device and illumination and/or signal designation equipment |
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| Publication number | Publication date |
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| CN108916805A (en) | 2018-11-30 |
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