CN114994826A - Light guide element and USB interface light-emitting structure thereof - Google Patents

Light guide element and USB interface light-emitting structure thereof Download PDF

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Publication number
CN114994826A
CN114994826A CN202210582459.1A CN202210582459A CN114994826A CN 114994826 A CN114994826 A CN 114994826A CN 202210582459 A CN202210582459 A CN 202210582459A CN 114994826 A CN114994826 A CN 114994826A
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CN
China
Prior art keywords
light guide
light
guide element
total reflection
incident
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Pending
Application number
CN202210582459.1A
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Chinese (zh)
Inventor
胡斌
宋慧贤
沈初杰
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Keboda Technology Co ltd
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Keboda Technology Co ltd
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Priority to CN202210582459.1A priority Critical patent/CN114994826A/en
Publication of CN114994826A publication Critical patent/CN114994826A/en
Pending legal-status Critical Current

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • 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
    • 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
    • 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]

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Light Guides In General And Applications Therefor (AREA)

Abstract

The invention discloses a light guide element and a USB interface light-emitting structure thereof, wherein the light guide element comprises a light guide element body and a plurality of light guide rings; the light guide element body is respectively connected with the plurality of light guide rings and is used for respectively guiding incident light beams emitted by the single light source into the plurality of light guide rings; the front end face and the rear end face of each light guide ring are respectively a light-emitting face and a pattern face. The invention has high light utilization efficiency, good light emitting uniformity and high light emitting efficiency.

Description

Light guide element and USB interface light-emitting structure thereof
Technical Field
The invention relates to a light-emitting structure of a USB interface.
Background
Fig. 1 shows an overall structural diagram of a conventional vehicle-mounted USB interface device, and fig. 2 shows a light-emitting structural diagram of a conventional vehicle-mounted USB interface, please refer to fig. 1 and fig. 2. The conventional vehicle-mounted USB interface device shown in fig. 1 includes a housing 90, two LED light sources 91, two light guide elements 92, a USB interface 93, and a PCB 94. The housing 90 is provided with a USB port for exposing the USB interface 93. The LED light source 91 and the USB interface 93 are both disposed on the same PCB board 94. The two LED light sources 91 and the two light guide elements 92 jointly form a light emitting structure of the vehicle-mounted USB interface, and when the vehicle-mounted USB interface works, direct light emitted by the two LED light sources 91 is respectively emitted into the two light guide elements 92 made of a diffusion (diffuse) light guide material, and the light is transmitted to the light emitting surface 921 located on the periphery of the USB interface 93 through the light guide elements 92, so that a lighting effect is achieved, and the peripheral boundary of the USB port is lighted.
The existing vehicle-mounted USB interface light-emitting structure needs a large number of LEDs, is poor in light-emitting uniformity and extremely low in efficiency. The USB interface light-emitting structure for lighting one USB port shown in FIG. 2 needs two LEDs respectively placed at the upper side and the lower side of the USB port, and for a USB product with two USB ports, four LEDs are needed to achieve an even lighting effect.
Disclosure of Invention
The technical problem to be solved by the present invention is to provide a light guide element and a USB interface light emitting structure thereof, which have high light utilization efficiency, good light emitting uniformity, and high light emitting efficiency.
According to one aspect of the present invention, there is provided a light guide element comprising a light guide element body and a plurality of light guide rings; the light guide element body is respectively connected with the plurality of light guide rings and is used for respectively guiding incident light beams emitted by the single light source into the plurality of light guide rings; the front end face and the rear end face of each light guide ring are respectively a light-emitting face and a pattern face.
Further, the light guide element body comprises a light incident surface and a total reflection surface; the light incident surface is used for receiving incident beams emitted by the light source, the total reflection surface is a reflection curved surface taking the center of the light source as a focus, and the total reflection surface is used for reflecting at least one part of the incident beams which enter the light guide element body through the light incident surface in a total reflection mode.
According to another aspect of the present invention, there is also provided a USB interface light emitting structure, which includes a single light source and the above light guide element; the plurality of light guide rings of the light guide element are used for respectively surrounding the plurality of USB interfaces in a one-to-one correspondence manner.
After the technical scheme is adopted, the invention at least has the following advantages and characteristics:
1. the invention realizes that a plurality of USB ports are lightened by a single light source, thereby greatly improving the utilization efficiency of light;
2. the patterned surface of the light guide ring can reflect light to the light emitting surface, so that the light emitting direction is ensured, the light emitting efficiency is improved, and the emitted light is more uniform;
3. by adopting a total reflection optical form, light can be gathered and conducted to a light emitting part, and the light emitting efficiency is improved.
Drawings
Fig. 1 is a schematic diagram illustrating an overall structure of a conventional vehicle-mounted USB interface device.
Fig. 2 shows a schematic view of a light-emitting structure of a conventional vehicle-mounted USB interface.
Fig. 3 shows a schematic diagram of a USB interface light-emitting structure according to a first embodiment of the present invention.
Fig. 4 shows a schematic structural diagram of a light guide element according to a first embodiment of the present invention.
Fig. 5 shows a schematic ray path diagram of the light guiding element according to the first embodiment of the present invention.
Fig. 6 is a schematic ray path diagram of the total reflection structure of the light guide element according to the first embodiment of the present invention, wherein the total reflection structure includes a spherical groove.
Fig. 7 is a schematic ray path diagram illustrating a total reflection structure of a light guide element according to a second embodiment of the present invention, wherein the total reflection structure does not include a spherical groove.
Fig. 8 shows a schematic diagram of a USB interface light-emitting structure according to a third embodiment of the present invention.
Detailed Description
The invention is described in detail below with reference to the figures and the specific embodiments.
Please refer to fig. 3 to 6. The USB interface light emitting structure according to the first embodiment of the present invention includes a light source 1 and a light guide element 2.
In the present embodiment, the number of the light sources 1 is one, and the light sources 1 are LED light sources.
The light guide element 2 includes a light guide element body 2a and a plurality of light guide rings 2 b. The light guide element body 2a is connected to the light guide rings 2b, respectively, and is configured to guide an incident light beam emitted by the light source 1 into the light guide rings 2b, respectively. The light guide rings 2b are used for respectively surrounding the plurality of USB interfaces in a one-to-one correspondence manner.
The light guide element 2 may be a member molded from a high molecular polymer or a member molded from optical glass. Preferably, the light guide element body 2a is made of a transparent material, and each light guide ring 2b is made of a diffusion material. In this embodiment, the light guide element body 2a is made of a PC transparent material, each light guide ring 2b is made of a PC diffusion (dispersion) material, and the light guide element body 2a and the light guide rings 2b are integrally injection-molded by two-shot molding.
In this embodiment, each light guide ring 2b is a rounded rectangular ring, which can improve the appearance, and further reduce the loss of light during propagation, thereby improving the light extraction efficiency. The shape of the light guide ring 2b can be adjusted according to actual requirements, and is not limited to a round-corner rectangular ring, but also can be a circular ring, a square ring or other irregular-shaped rings.
The front end surface 201 and the rear end surface 202 of each light guiding ring 2b are a light emitting surface and a patterned surface, respectively, and the patterned surface is used for reflecting at least a part of light emitted into the light guiding ring 2b to the light emitting surface. The rear end face opposite to the light-emitting surface is provided with patterns, so that the main irradiation direction of light can be adjusted, and most of light rays are irradiated along the direction of the light-emitting surface. Compared with the mode that the patterns are arranged on the side surface perpendicular to the light-emitting surface, the light-emitting efficiency can be improved by about 50% under the same condition that the patterns are arranged on the rear end surface opposite to the light-emitting surface. In addition, since the rear end face 202 is a plane, it is easier to machine a pattern on the plane, and the machining cost is lower.
The patterns on the pattern surface are mainly used for changing the light emitting direction. In this embodiment, the decorative pattern of decorative pattern face is the dot matrix decorative pattern, and the dot matrix decorative pattern has the light-emitting advantage such as even, the processing is easy, with low costs. In other embodiments, the lattice pattern may be replaced with other types of micro-patterns.
In the example shown in the figure, the number of light guiding rings 2b is two, and the light guiding element body 2a comprises a light guiding base 21 and two light guiding uprights 22. The bottom ends of the two light guide columns 22 are respectively connected with the light guide base 21, and the two light guide rings 2b are respectively connected with the top ends of the two light guide columns 22.
The light guide base 21 includes a total reflection structure, a first V-shaped reflection surface 213, a first reflection surface 214, and a second reflection surface 215. The total reflection structure is configured to totally reflect at least a portion of an incident light beam emitted from the light source 1 into the light guide base 21 to form a parallel light ray 3a, and reflect the parallel light ray 3a to the first V-shaped reflection surface 213. The first V-shaped reflecting surface 213 is configured to reflect the parallel light 3a from the total reflection structure to two sides, respectively, to form a first path of parallel light 3b and a second path of parallel light 3c with opposite propagation directions. The first reflecting surface 214 and the second reflecting surface 215 are respectively located at two sides of the first V-shaped reflecting surface 213, and are used for respectively reflecting the first path of parallel light 3b and the second path of parallel light 3c into the two light guiding columns 22. The two light guide columns 22 are used for respectively transmitting the first path of parallel light 3b and the second path of parallel light 3c to the two light guide rings 2 b.
Preferably, a V-shaped groove 216 is disposed at the intersection of each light guiding ring 2b and the light guiding element body 2a, and two side surfaces of the V-shaped groove 216 form a second V-shaped reflecting surface, so as to reflect the light rays incident from the light guiding columns 22 of the light guiding element body 2a to two sides respectively, thereby forming two parallel light beams entering the light guiding rings 2b respectively. The light guide ring enters in a parallel light mode, the path is single, the loss of light propagation is reduced, and because each path of parallel light only needs to be propagated in half of the perimeter of the light guide ring 2b, the length of the propagation path is reduced, and the uniformity of light emission is improved.
Each light guide ring 2b changes the light emitting direction through lattice patterns, and irradiates light to a USB port which is arranged on the shell and used for exposing the USB interface, so that the lighting effect is achieved.
In the first embodiment, the total reflection structure includes a total reflection surface 211 and a spherical groove 212 disposed on the light incident surface 210 of the light guide base 21. The total reflection surface 211 is a reflection curved surface with the center of the light source 1 as a focus, the spherical groove 212 is lower than the center of the light source 1 and takes the center of the light source 1 as a sphere center, the depth H of the spherical groove 212 needs to satisfy 0 & ltH & ltR, R is the radius of the spherical groove 212, and R is smaller than the focal length of the reflection curved surface.
Please refer to fig. 6. The spherical groove 212 allows an incident light beam from the light source 1 to enter the light guide element body 2a in a direction normal to the bottom surface of the spherical groove and to partially enter the curved reflective surface 211. Since the center of the spherical recess 212 is the center of the light source 1, the light passing through the spherical recess 212 is not refracted, and the light reaching the curved reflective surface 211 is still equivalent to a straight light emitted from the light source 1, and the focal point of the curved reflective surface 211 is the center of the light source 1, the light reflected by the curved reflective surface 211 is parallel light and is in accordance with the path direction.
The LED light source is characterized in that the spherical groove and the total reflection surface are arranged to form parallel light, the first V-shaped reflection surface, the first reflection surface, the second reflection surface and the second V-shaped reflection surface continuously reflect light in the form of parallel light, the back of the light-emitting surface of the light guide ring is provided with dot patterns, and the light guide ring is arranged in a rounded rectangular structure, so that the LED power can meet the same brightness requirement only by 1/8 of the LED power of the traditional scheme introduced in the background technology part of the application, the efficiency is improved by about 32 times in comparison, the light utilization is greatly improved, the integral uniformity can reach more than 90%, and the LED light source is more suitable for new energy vehicles sensitive to energy consumption.
In the first embodiment, the light guide base 21 has a T shape, and the T-shaped light guide base 21 includes a vertical side portion 21a and a horizontal side portion 21 b. The total reflection structure is disposed at one end of the vertical portion 21a, and the other end of the vertical portion 21a is connected to the first side of the horizontal portion 21 b. The first V-shaped reflecting surface 213 is formed by two side surfaces of a V-shaped groove provided on the second side of the lateral side portion 21b, the second side of the lateral side portion 21b being opposite to the first side of the lateral side portion 21 b. The first reflecting surface 214 and the second reflecting surface 215 are formed by inclined surfaces provided at both ends of the lateral side portion 21b, respectively. The bottom ends of the two light guide columns 22 are connected to the top ends of the lateral side portions 21b, respectively.
The total reflection structure improves the light utilization efficiency of the light source. The spherical groove 212 is provided in the total reflection structure in order to reduce the refraction of light, and the total reflection effect can be achieved without the groove, but the utilization efficiency of light is slightly reduced due to the deviation of the refraction. In the second embodiment of the present invention, the total reflection structure is not provided with a spherical groove, as shown in fig. 7, light is refracted after passing through the light incident surface 210, and the light is deflected, and at this time, the light is deflected after being reflected by the curved reflection surface 211, so that parallel light cannot be formed (but substantially parallel light can be emitted), which is not consistent with the path, and part of the light is leaked. Through setting up spherical recess, luminous efficiency promotes about 10%.
Fig. 8 shows a schematic diagram of a USB interface light-emitting structure according to a third embodiment of the present invention. The third embodiment is mainly different from the first embodiment in that the light guide element body 2a is provided in a cylindrical light guide strip structure, and light is guided to the respective light guide rings 2b through the light guide strips. Wherein, the light guide element body 2a comprises a main light guide strip 25 and a plurality of branch light guide strips 26; one end of the main light guide strip 25 is used for receiving an incident light beam emitted by a single light source 1, the other end of the main light guide strip 25 is respectively connected with one end of the plurality of branch light guide strips 26 so as to respectively transmit the incident light beam to the plurality of branch light guide strips 26, and the other ends of the plurality of branch light guide strips 26 are respectively connected with the plurality of light guide rings 2b in a one-to-one correspondence manner.
In the traditional vehicle-mounted USB interface light-emitting structure, two USB ports can be lighted by four LED light sources, and the USB interface light-emitting structure adopting the embodiment of the invention can be lighted by only one LED, so that the light utilization efficiency is improved. The invention is not only suitable for USB products with two USB ports, but also suitable for USB products with more USB ports. For products with more USB ports (such as three, four and the like), the number of the light guide rings is increased, and light is conducted to each light guide ring.
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 (18)

1. A light guide element, comprising a light guide element body and a plurality of light guide rings;
the light guide element body is respectively connected with the plurality of light guide rings and is used for respectively guiding incident light beams emitted by a single light source into the plurality of light guide rings;
the front end face and the rear end face of each light guide ring are respectively a light-emitting face and a pattern face.
2. The light guide element according to claim 1, wherein a V-shaped groove is formed at an intersection of each light guide ring and the light guide element body, and two side surfaces of the V-shaped groove are used for reflecting light rays incident from the light guide element body to two sides respectively to form two parallel light beams entering the light guide rings respectively.
3. A light guide element according to claim 1, wherein the light guide element body is provided with a plurality of light guide pillars, and the plurality of light guide rings are respectively connected to top ends of the plurality of light guide pillars.
4. A light-guiding element as claimed in claim 1, wherein each light-guiding ring is in the shape of a rounded rectangular ring.
5. A light guide element according to claim 1, wherein the light guide element body is made of a transparent material, and each light guide ring is made of a diffusing material.
6. The light guide element according to claim 1, wherein the light guide element body is made of a PC transparent material, and each light guide ring is made of a PC diffusing material;
the light guide element body and the light guide rings are integrally formed by double-shot injection molding.
7. A light-directing element according to claim 1, wherein the pattern of the patterned surface is a lattice pattern.
8. A light-directing element according to claim 1, wherein the single light source is a single LED light source.
9. A light guide element according to claim 1, wherein the light guide element body comprises a total reflection structure for totally reflecting at least a part of the incident light beam emitted from the single light source to form parallel light rays.
10. A light guide element according to claim 1, wherein the light guide element body comprises a light incident surface and a total reflection surface; the light incident surface is used for receiving incident beams emitted by the light source, the total reflection surface is a reflection curved surface which takes the center of the light source as a focus, and the total reflection surface is used for reflecting at least one part of the incident beams which enter the light guide element body through the light incident surface in a total reflection mode.
11. The light guide element according to claim 10, wherein the light guide element comprises a spherical groove disposed on the light incident surface of the light guide element body, the spherical groove uses the center of the light source as a spherical center, the depth H of the spherical groove is 0 < H < R, R is a radius of the spherical groove, and R is smaller than the focal length of the reflective curved surface; the spherical groove is used for enabling incident light beams emitted by the light source to enter the light guide element body along the normal direction of the bottom surface of the spherical groove and partially enter the reflecting curved surface.
12. A light-guiding element according to any one of claims 1 to 8, wherein the number of light-guiding rings is two;
the light guide element body comprises a light guide base and two light guide stand columns; the bottom ends of the two light guide upright columns are respectively connected with the light guide base, and the two light guide rings are respectively connected with the top ends of the two light guide upright columns;
the light guide base comprises a total reflection structure, a first V-shaped reflecting surface, a first reflecting surface and a second reflecting surface; the total reflection structure is used for reflecting at least one part of incident light beams emitted into the light guide base by the single light source to the first V-shaped reflecting surface in a total reflection mode; the first V-shaped reflecting surface is used for reflecting the light rays from the total reflection structure to two sides respectively to form a first path of parallel light and a second path of parallel light with opposite propagation directions; the first reflecting surface and the second reflecting surface are respectively positioned at two sides of the first V-shaped reflecting surface and are used for respectively reflecting the first path of parallel light and the second path of parallel light into the two light guide columns; the two light guide upright columns are used for respectively transmitting the first path of parallel light and the second path of parallel light to the two light guide rings.
13. A light guide element according to claim 12, wherein the total reflection structure comprises a total reflection surface, the total reflection surface is a curved reflection surface with a center of the light source as a focus, and the total reflection surface is configured to reflect at least a portion of the incident light beam incident into the light guide base to the first V-shaped reflection surface in a total reflection manner.
14. A light guide element according to claim 13, wherein the total reflection structure includes a spherical recess disposed on the light incident surface of the light guide base, the spherical recess has a center of sphere as a center of the light source, a depth H of the spherical recess satisfies 0 < H < R, R is a radius of the spherical recess, and R is smaller than a focal length of the reflective curved surface; the spherical groove is used for enabling incident beams emitted by the light source to enter the light guide base along the normal direction of the bottom surface of the spherical groove and partially enter the reflecting curved surface.
15. A light guide element according to claim 12, wherein the light guide base is T-shaped, the T-shaped light guide base comprising a vertical edge portion and a lateral edge portion;
the total reflection structure is arranged at one end of the vertical edge part, and the other end of the vertical edge part is connected with the first side of the transverse edge part; the first V-shaped reflecting surface is formed by two side surfaces of a V-shaped groove arranged on the second side of the transverse edge part, and the second side is opposite to the first side; the first reflecting surface and the second reflecting surface are formed by inclined surfaces respectively arranged at two ends of the transverse edge part;
the bottom ends of the two light guide upright columns are respectively connected with the top ends of the transverse edge parts.
16. A light-guiding element as claimed in any one of claims 1 to 8 wherein the light-guiding element body comprises a main light bar and a plurality of branch light bars;
one end of the main light guide strip is used for receiving incident light beams emitted by the single light source, the other end of the main light guide strip is connected with one end of each of the plurality of branch light guide strips respectively so as to conduct the incident light beams into the plurality of branch light guide strips respectively, and the other ends of the plurality of branch light guide strips are connected with the plurality of light guide rings in a one-to-one correspondence mode respectively.
17. A USB interface lighting structure, comprising a single light source and a light guide element according to any one of claims 1 to 16;
the plurality of light guide rings of the light guide element are used for respectively surrounding the plurality of USB interfaces in a one-to-one correspondence manner.
18. The USB interface lighting structure according to claim 17, wherein the USB interface is a vehicle-mounted USB interface.
CN202210582459.1A 2022-05-26 2022-05-26 Light guide element and USB interface light-emitting structure thereof Pending CN114994826A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210582459.1A CN114994826A (en) 2022-05-26 2022-05-26 Light guide element and USB interface light-emitting structure thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210582459.1A CN114994826A (en) 2022-05-26 2022-05-26 Light guide element and USB interface light-emitting structure thereof

Publications (1)

Publication Number Publication Date
CN114994826A true CN114994826A (en) 2022-09-02

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202210582459.1A Pending CN114994826A (en) 2022-05-26 2022-05-26 Light guide element and USB interface light-emitting structure thereof

Country Status (1)

Country Link
CN (1) CN114994826A (en)

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