CN112984419A - Lighting decoration device and light guide element - Google Patents
Lighting decoration device and light guide element Download PDFInfo
- Publication number
- CN112984419A CN112984419A CN202110413941.8A CN202110413941A CN112984419A CN 112984419 A CN112984419 A CN 112984419A CN 202110413941 A CN202110413941 A CN 202110413941A CN 112984419 A CN112984419 A CN 112984419A
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- China
- Prior art keywords
- light
- guide element
- convex lens
- light guide
- light emitting
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S8/00—Lighting devices intended for fixed installation
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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
- F21V5/048—Refractors for light sources of lens shape the lens being a simple lens adapted to cooperate with a point-like source for emitting mainly in one direction and having an axis coincident with the main light transmission direction, e.g. convergent or divergent lenses, plano-concave or plano-convex lenses
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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
- F21V2200/00—Use of light guides, e.g. fibre optic devices, in lighting devices or systems
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
- F21W2106/00—Interior vehicle lighting devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
- F21W2107/00—Use or application of lighting devices on or in particular types of vehicles
- F21W2107/10—Use or application of lighting devices on or in particular types of vehicles for land vehicles
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
- F21Y2115/00—Light-generating elements of semiconductor light sources
- F21Y2115/10—Light-emitting diodes [LED]
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Illuminated Signs And Luminous Advertising (AREA)
- Planar Illumination Modules (AREA)
Abstract
The invention discloses an illumination decoration device and a light guide element. The lighting decoration device comprises a light source and a light guide element, wherein the light source comprises at least one light emitting unit, and the light guide element is provided with a light incoming surface, a light outgoing surface and at least one group of light beam diffusion structures which are in one-to-one correspondence with the at least one light emitting unit. Each group of light beam diffusion structures comprises a first beam expansion structure and a second beam expansion structure, wherein the first beam expansion structures are arranged on the light inlet surface and are used for refracting and diffusing light incident from the corresponding light emitting units into first diffused light beams to the second beam expansion structures; the second beam expanding structure is arranged in the light guide element and used for refracting and diffusing the first diffused light beam into a second diffused light beam which is emitted to the light emitting surface. The illumination decoration device can ensure that the brightness and the color uniformity of all positions in the length direction of the light-emitting surface are good, and the dark areas are clear.
Description
Technical Field
The present invention relates to illuminated trim apparatus, and more particularly to apparatus for illuminating and trimming the interior of a vehicle.
Background
Components for vehicle interior lighting and trim, such as mood lights and the like, may be used for combined contour lighting and ambient lighting in a motor vehicle interior. Fig. 1 schematically shows a structure of a conventional illuminated decoration apparatus, and as shown in fig. 1, the illuminated decoration apparatus includes a light source 91 for emitting light and a strip-shaped light guide element 92. The light source 91 includes one or more LEDs 911, and the LEDs 911 are disposed on a circuit board 912. The light guide element 92 has a light incident surface 92a and a light emitting surface 92 b. By using the structure, animation effects can be realized, such as selectively controlling the turning-on or turning-off of partial light sources to form the effects of bright-dark intervals and scrolling.
In the prior art, in order to meet the requirement of uniform light emission and sufficient mixing of multicolor light, a larger-sized light guide element is usually selected to provide a sufficient light guide path, or a dual-component or multi-component light guide is formed by multicolor injection molding, or a light emitting part or a light incident part of the light guide element is made of a light diffusion and guide material. The method has the advantages of large required structural space, complex production process, multiple processing procedures and high cost. In addition, since the diffusion of light is not controlled (or difficult to control accurately), the emergent light of a single LED can be diffused sufficiently at the light-emitting surface, and a large light spot is formed. When the animation effect is realized (such as the bright-dark interval and the rolling effect), because the light spot is large, the inevitable overlap between the light spot and the brightness of the dark area are too high (namely, the dark area is not dark enough), the bright-dark interval is not obvious, the rolling effect is poor, and the animation display effect cannot meet the requirement. If the size of the light guide member or the size of the diffusing member is changed to reduce the spot diffusion size, the brightness uniformity when all the light sources are lit up becomes poor when the dark area is sufficiently dark.
In addition, the prior art still exhibits poor optical effects at the end of the light-emitting region, such as much lower brightness than the middle portion, or incomplete mixing of multiple colors of light, with some single color appearing at the end of the mixed color, resulting in a poor optical experience for the user.
Disclosure of Invention
The technical problem to be solved by the invention is to provide an illumination decoration device, which can ensure good brightness and color uniformity at each position in the length direction of a light-emitting surface, clear dark areas, small required structural space and simple part processing.
Another object of the present invention is to provide a light guide element.
The embodiment of the invention provides an illumination decoration device, which comprises a light source and a light guide element, wherein the light source comprises at least one light emitting unit; the light guide element is provided with at least one group of light beam diffusion structures which are in one-to-one correspondence with the at least one light emitting unit; each group of light beam diffusion structures comprises a first beam expansion structure and a second beam expansion structure, wherein the first beam expansion structures are arranged on the light inlet surface and used for refracting and diffusing light incident from the corresponding light emitting units into first diffused light beams to the second beam expansion structures; the second beam expanding structure is arranged in the light guide element and used for refracting and diffusing the first diffused light beam into a second diffused light beam which is emitted to the light emitting surface.
The embodiment of the invention also provides a light guide element, which is provided with a light incident surface and a light emergent surface; it is characterized in that the light guide element is provided with at least one group of light beam diffusion structures; each light beam diffusion structure comprises a first beam expansion structure and a second beam expansion structure, wherein the first beam expansion structure is arranged on the light inlet surface and is used for refracting and diffusing light incident from an external light emitting unit into a first diffused light beam to the second beam expansion structure; the second beam expanding structure is arranged in the light guide element and used for refracting and diffusing the first diffused light beam into a second diffused light beam which is emitted to the light emitting surface.
The light guide element comprises a main body part, a first side part and a second side part; the first side part and the second side part are respectively positioned at the left side and the right side of the main body part and are respectively connected with the main body part; the main body part is opposite to the light source, and the length of the main body part is equal to that of the light source; the first side part and the second side part are internally provided with a first side convex lens and a second side convex lens respectively, the first side convex lens is used for refracting light emitted by the light source to the left side surface of the light guide element to the light emitting surface, and the second side convex lens is used for refracting light emitted by the light source to the right side surface of the light guide element to the light emitting surface.
The invention has at least the following technical effects:
1. the embodiment of the invention respectively arranges the beam expanding structures on the light incident surface and the light propagation path to change and control the width of light spots of light emitted by the light source on the light emergent surface, thereby ensuring the optical uniformity and the light mixing effect, ensuring the formation of clear dark areas and realizing the effect of controllable dark areas during animation display;
2. the embodiment of the invention refracts the light emitted by the light-emitting unit for multiple times so as to improve the light-emitting width and optical intersection, shorten the large optical path required by the design of the traditional light guide element, and keep the overall size of the illumination decoration device smaller, thereby being suitable for more vehicle types;
3. according to the light guide element disclosed by the embodiment of the invention, the convex lenses are respectively arranged on the two sides, so that light rays originally emitted on the side walls are refracted onto the light-emitting surface, the optical effect of the end part of the light-emitting surface is improved, and the light utilization rate is improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 shows a schematic view of a conventional illuminated decoration apparatus.
Fig. 2 shows a schematic configuration of an illuminated decorative apparatus according to a first embodiment of the present invention.
Fig. 3 shows a schematic structural diagram of a light guiding element according to a first embodiment of the present invention.
Fig. 4 shows a schematic configuration of an illuminated decorative apparatus according to a second embodiment of the present invention.
Fig. 5 and 6 show light intensity distribution diagrams of the light exit surface along the length direction when the existing illumination decoration device and the illumination decoration device of the first embodiment of the invention perform bright and dark interval display, respectively.
Fig. 7 shows a schematic configuration of an illuminated decorative apparatus according to a third embodiment of the present invention.
Detailed Description
The invention is described in detail below with reference to the figures and specific embodiments.
Please refer to fig. 2 and fig. 3. The illuminated decorative device according to the first embodiment of the present invention includes a light source 1 and a light guiding element 2.
The light source 1 comprises at least one light emitting unit 11. In the present embodiment, the light source 1 includes a plurality of light emitting units 11, and the light emitting units 11 are LEDs (light emitting diodes). The LEDs 11 are disposed on a circuit board 12, which circuit board 12 may be a rigid or flexible circuit board. In the case of a light source 1 with a plurality of LEDs 11, the LEDs may emit monochromatic or polychromatic light, and the light source 1 is a color-variable light-emitting module. The plurality of LEDs 11 may produce mixed light, such as mixed white light.
The light guide element 2 has a light incident surface 2a, a light emitting surface 2b, and at least one set of light beam diffusion structures corresponding to the at least one light emitting unit 11. The light guide element may be a member formed of a high molecular polymer or a member formed of optical glass. The light guiding element may be a transparent or single component light guide with a diffusing function.
Each group of light beam diffusion structures includes a first beam expansion structure 31 and a second beam expansion structure 32, the first beam expansion structure 31 is disposed on the light incident surface 2a, and is configured to refract and diffuse light incident from the corresponding light emitting unit 11 into a first diffused light beam 41, which is transmitted to the second beam expansion structure 32; the second beam expanding structure 32 is disposed inside the light guide element 2, and is used for refracting and diffusing the first diffused light beam 41 into a second diffused light beam 42, and outputting the second diffused light beam to the light output surface 2 b.
In the present embodiment, the first and second beam expanding structures 31 and 32 and the corresponding light emitting unit 11 are coaxially disposed, that is, the central axes of the first and second beam expanding structures 31 and 32 and the corresponding light emitting unit 11 are located on the same straight line.
In the present embodiment, the first beam expanding structure 31 is a concave lens formed by inwardly recessing the light incident surface at a position corresponding to the light emitting unit; the second beam expanding mechanism 32 is a convex lens, and the refractive index of the convex lens 32 is smaller than that of the light guide element. Optionally, the convex lens 32 is an air convex lens, that is, the convex lens 32 is in a hole shape, and the light-transmitting medium in the hole is air. In another embodiment, as shown in fig. 4, a material having a refractive index smaller than that of the light guide material may also be selected as the filling portion of the convex lens 32.
Optionally, the convex lens 32 is a plano-convex lens, the planar side of which faces the concave lens 31.
As shown in fig. 2, the light emitted from the light emitting unit 11 passes through the concave lens 31 at the light incident position, and the arc light incident surface of the concave lens 31 makes the light undergo the first refraction and diffusion when entering the light guiding element 2, and can prevent the light from undergoing the total reflection at the light incident surface 2 a. The first diffused light beam 41 passes through the plano-convex lens 32 (in the example of fig. 2) in the propagation path, the light incident surface of the plano-convex lens 32 is a plane surface, so that the light is refracted out of the medium more (further diffused) instead of total reflection, and after further diffused by the plano-convex lens, the light emitting width of the second diffused light beam 42 is obviously increased, and the uniformity is optimized. Meanwhile, as the optics are refracted in the air and the medium for many times, the multicolor light rays are more mutually inserted, and the light mixing effect is better.
The above-mentioned structure of this embodiment utilizes the combination of medium concave lens and air convex lens, utilizes the control effect of lens to light, and the homogeneity of luminance when both can realizing full bright display can guarantee the controllable effect of dark space when the animation shows again, and required structure space is little, part processing is simple. Namely: when all the light emitting units 11 are fully lit, the light is diffused and mixed for three times through the combination of the medium concave lens and the air convex lens, compared with other types of lens combinations, the light of a single light emitting unit can be more effectively diffused and mixed, the light utilization rate is high, and therefore the brightness/color uniformity of all the positions on the light emitting surface along the length direction of the light emitting surface is good. When displaying animation effect (for example, the light-emitting units are selectively lighted to form light and dark interval and rolling effect), because the air convex lens controls the light (namely, the diffusion is limited in a certain angle range by the lens), the light emitted by the light-emitting units cannot form a light spot connected into a whole at the emergent surface because of excessive diffusion, so that clear dark area (namely, the dark area is dark enough) can be ensured to be formed. In addition, since the light spot of the light emitting unit is expanded by the diffusion of the convex lens, the size of the dark area between the bright areas can be controlled to a smaller range than that of other types of lenses when the bright and dark intervals are displayed, thereby more facilitating the effect of continuous scrolling when the state (on/off, brightness or color) of the light emitting unit is changed over time, and if the bright area and the dark area are close in size, the continuity of scrolling observed by the user when the scrolling effect is displayed is poor. The embodiment has better application in the interior lighting/atmosphere decoration device with animation effect, such as common charging mode: the light and dark intervals are scrolled.
The shape of the light guide element 2 is not limited to a straight line, and may be other shapes, such as an arc shape, according to the space and the effect.
FIGS. 5 and 6 are graphs showing the light intensity distribution of the light-emitting surface along the length direction when the conventional illumination decoration device and the illumination decoration device according to the first embodiment of the present invention are displayed with a light and dark interval, respectively, and the unit cd/m of the vertical axis in the graphs2. As can be seen from fig. 5 and 6, the dark regions of fig. 5 are brighter and less sharp than fig. 6, while the dark regions of fig. 6 are darker and more sharp than fig. 5.
In this embodiment, the light incident surface 2a and the light emitting surface 2b are respectively located at two opposite sides of the light guiding element 2. Furthermore, in order to match with a better optical effect, a dermatoglyph or a fine optical pattern may be added on the light incident surface 2a or the light emitting surface 2 b.
In this embodiment, one side of the light guide element 2 facing the light source 1 is provided with at least one arc protrusion 21 corresponding to the at least one light emitting unit 11 one to one, and the light incident surface 2a is formed by the top of the at least one arc protrusion 21.
In other embodiments, the surface of the convex lens 32 facing the concave lens 31 is an inwardly concave (i.e., concave toward the light emitting surface 2 b) arc surface, and the radius of curvature of the arc surface is larger than that of the surface of the convex lens 32 facing away from the concave lens 31.
In the first embodiment, the length of the light guiding element 2 is equal to the length of the light source 1. Referring to fig. 4 and 7, in the second and third embodiments, the length of the light guide element 2 is greater than that of the light source 1, and the light guide element 2 includes a main body 200, a first side 201 and a second side 202; the first side portion 201 and the second side portion 202 are respectively located at the left and right sides of the main body portion 200 and are respectively connected to the main body portion 200. The main body 200 faces the light source 1, and the length of the main body 200 is equal to the length L of the light source 1. Neither the first side 201 nor the second side 202 is sufficient to accommodate one more LED 11. The first side portion 201 and the second side portion 202 are respectively provided with a first side convex lens 51 and a second side convex lens 52, the first side convex lens 51 is used for refracting the light emitted from the light source 1 to the left side surface of the light guide element 2 to the light emitting surface 2b, and the second side convex lens 52 is used for refracting the light emitted from the light source 1 to the right side surface of the light guide element 2 to the light emitting surface 2 b.
The second and third embodiments use the convex lens principle, so that the light rays originally emitted to the side wall are reflected to the light emitting surface after being refracted by a large angle, the two ends of the light guide element are not dark, and the brightness and color uniformity of the end part are ensured.
The lighting decoration device of the embodiment can be a lighting decoration device on a lower instrument panel of a windshield in an automobile, and can also be a lighting decoration device on a door panel and a floor in the automobile.
The illumination decoration device of the embodiment of the invention realizes the diffusion of light and controls the diffusion direction of the light by adjusting the sizes (such as length, width and focal length) of the concave lens 31 and the convex lens 32, ensures the optical uniformity and the light mixing effect, controls the size of light spots of light emitted by a single LED on the light emitting surface, ensures that the light is controllable, has clear dark areas, and can meet the light emitting requirement of complex animation.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (12)
1. A lighting decoration device comprises a light source and a light guide element, wherein the light source comprises at least one light emitting unit, and the light guide element is provided with a light incoming surface and a light outgoing surface; the light guide element is provided with at least one group of light beam diffusion structures which are in one-to-one correspondence with the at least one light emitting unit;
each group of the light beam diffusion structures comprises a first beam expansion structure and a second beam expansion structure, and the first beam expansion structures are arranged on the light incident surface and used for refracting and diffusing light incident from the corresponding light emitting units into first diffused light beams which are transmitted to the second beam expansion structures; the second beam expanding structure is arranged inside the light guide element and used for refracting and diffusing the first diffused light beam into a second diffused light beam which is emitted from the light emitting surface.
2. The illuminated trim apparatus according to claim 1, wherein the first beam expanding structure, the second beam expanding structure and the corresponding light emitting unit are coaxially arranged.
3. An illuminated decoration apparatus according to claim 1 or 2 wherein, the first beam expanding structure is a concave lens formed by the light entering surface being inwardly concave;
the second beam expanding mechanism is a convex lens, and the refractive index of the convex lens is smaller than that of the light guide element.
4. The illuminated decoration device of claim 3 wherein the convex lens is an air convex lens.
5. The illuminated decoration device of claim 3 wherein, the convex lens is a plano-convex lens, the plane side of the plano-convex lens facing the concave lens;
or, the surface of the convex lens facing the concave lens is an inward concave arc surface, and the curvature radius of the arc surface is greater than that of the surface of the convex lens facing away from the concave lens.
6. The lighting decoration device of claim 1 or 2, wherein the light incident surface and the light emergent surface are respectively located at two opposite sides of the light guide element.
7. The illuminated decoration apparatus according to claim 1, wherein a side of the light guide element facing the light source is provided with at least one arc-shaped protrusion corresponding to the at least one light emitting unit one by one, and the light incident surface is formed by a top of the at least one arc-shaped protrusion.
8. The illuminated ornamental device according to claim 1 or 7, wherein the light guiding member comprises a main body portion, a first side portion and a second side portion; the first side part and the second side part are respectively positioned at the left side and the right side of the main body part and are respectively connected with the main body part;
the main body part is opposite to the light source, and the length of the main body part is equal to that of the light source; the first side part and the second side part are internally provided with a first side convex lens and a second side convex lens respectively, the first side convex lens is used for refracting light emitted by the light source to the left side surface of the light guide element to the light emitting surface, and the second side convex lens is used for refracting light emitted by the light source to the right side surface of the light guide element to the light emitting surface.
9. The illuminated decoration apparatus according to claim 1 wherein, the light emitting unit is an LED.
10. A light guide element is provided with a light incident surface and a light emergent surface; the light guide element is characterized in that at least one group of light beam diffusion structures are arranged on the light guide element;
each light beam diffusion structure comprises a first beam expansion structure and a second beam expansion structure, and the first beam expansion structure is arranged on the light incoming surface and is used for refracting and diffusing light incident from an external light emitting unit into a first diffused light beam and transmitting the first diffused light beam to the second beam expansion structure; the second beam expanding structure is arranged inside the light guide element and used for refracting and diffusing the first diffused light beam into a second diffused light beam which is emitted from the light emitting surface.
11. The light guide element of claim 10, wherein the first beam expanding structure, the second beam expanding structure and the light emitting unit are coaxially arranged.
12. A light-guiding element as claimed in claim 10 or 11 wherein the first beam expanding structure is a concave lens;
the second beam expanding structure is a convex lens, and the refractive index of the convex lens is smaller than that of the light guide element.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110413941.8A CN112984419A (en) | 2021-04-16 | 2021-04-16 | Lighting decoration device and light guide element |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110413941.8A CN112984419A (en) | 2021-04-16 | 2021-04-16 | Lighting decoration device and light guide element |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112984419A true CN112984419A (en) | 2021-06-18 |
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ID=76340944
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110413941.8A Pending CN112984419A (en) | 2021-04-16 | 2021-04-16 | Lighting decoration device and light guide element |
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| Country | Link |
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| CN (1) | CN112984419A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114034020A (en) * | 2021-11-30 | 2022-02-11 | 重庆惠科金扬科技有限公司 | Light assembly and display device |
| WO2024109828A1 (en) * | 2022-11-25 | 2024-05-30 | 法雷奥照明公司 | Light guide, lighting device and vehicle |
-
2021
- 2021-04-16 CN CN202110413941.8A patent/CN112984419A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114034020A (en) * | 2021-11-30 | 2022-02-11 | 重庆惠科金扬科技有限公司 | Light assembly and display device |
| CN114034020B (en) * | 2021-11-30 | 2024-05-14 | 重庆惠科金扬科技有限公司 | Light assembly and display device |
| WO2024109828A1 (en) * | 2022-11-25 | 2024-05-30 | 法雷奥照明公司 | Light guide, lighting device and vehicle |
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