CN114935867A - Light emitting device and lens structure - Google Patents
Light emitting device and lens structure Download PDFInfo
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- CN114935867A CN114935867A CN202210618469.6A CN202210618469A CN114935867A CN 114935867 A CN114935867 A CN 114935867A CN 202210618469 A CN202210618469 A CN 202210618469A CN 114935867 A CN114935867 A CN 114935867A
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- light
- light emitting
- optical axis
- lens structure
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B15/00—Special procedures for taking photographs; Apparatus therefor
- G03B15/02—Illuminating scene
- G03B15/03—Combinations of cameras with lighting apparatus; Flash units
- G03B15/05—Combinations of cameras with electronic flash apparatus; Electronic flash units
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B3/00—Simple or compound lenses
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- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Led Device Packages (AREA)
- Electroluminescent Light Sources (AREA)
Abstract
The invention discloses a light-emitting device and a lens structure. The light emitting device includes at least one light emitting element and a lens structure. The lens structure is provided with an optical axis, a light incoming surface and a light outgoing surface, the optical axis penetrates through the light incoming surface and the light outgoing surface, the light incoming surface is arranged opposite to the light outgoing surface, the light incoming surface faces at least one light emitting element, the light incoming surface is provided with a protruding portion, a first concave portion and a first flat portion, the protruding portion corresponds to the optical axis, the first concave portion surrounds the protruding portion, and the first flat portion surrounds the first concave portion. Therefore, the light-emitting device and the lens structure can improve the uniformity of the brightness of the light shape.
Description
Technical Field
The present invention relates to a light emitting device and a lens structure applied to the technical field of flash lamps, and more particularly, to a light emitting device and a lens structure capable of improving uniformity of brightness of light shape.
Background
As technology has evolved and developed rapidly, many portable electronic devices have been equipped with a camera lens and a Light Emitting Diode (LED) flash. For light weight and improvement of uniformity of brightness of light shape, Fresnel Lens (Fresnel Lens) is commonly used in LED flash lamps. The Fresnel lens can block the lens according to the characteristics of the LED to construct a continuous curved surface so as to improve the effect of uniformity.
The brightness of the light form projected by a general plane lens is still insufficient in uniformity, as shown in fig. 1; and if the Fresnel lens is used, the processing technology is difficult.
Therefore, how to overcome the above-mentioned drawbacks by improving the structural design has become one of the important issues to be solved in the art.
Disclosure of Invention
The present invention provides a light emitting device and a lens structure for simplifying the prior art.
In order to solve the above technical problem, one technical solution of the present invention is to provide a light emitting device, which includes at least one light emitting element and a lens structure. The lens structure has optical axis, income plain noodles and goes out the plain noodles, the optical axis passes go into the plain noodles and go out the plain noodles, go into the plain noodles with it sets up relatively to go out the plain noodles, it is facing at least one to go into the plain noodles light emitting component, it has bellying, first depressed part and first flat portion to go into the plain noodles, the bellying corresponds to the optical axis, first depressed part centers on the bellying, just first flat portion centers on first depressed part.
In order to solve the above technical problem, another technical solution adopted by the present invention is to provide a lens structure, which includes an optical axis, a light incident surface and a light emitting surface, wherein the optical axis passes through the light incident surface and the light emitting surface, the light incident surface is opposite to the light emitting surface, the light incident surface includes a protrusion, a first recess, and a first flat portion, the protrusion corresponds to the optical axis, the first recess surrounds the protrusion, and the first flat portion surrounds the first recess.
The light-emitting device provided by the invention has the beneficial effects that the lens structure is provided with the optical axis, the light-in surface and the light-out surface, the optical axis penetrates through the light-in surface and the light-out surface, the light-in surface and the light-out surface are arranged oppositely, the light-in surface faces at least one light-emitting element, the light-in surface is provided with the convex part, the first concave part and the first flat part, the convex part corresponds to the optical axis, the first concave part surrounds the convex part, and the first flat part surrounds the first concave part, so that the uniformity of light shape brightness is improved.
One of the other effects of the present invention is that the lens structure provided by the present invention can improve the uniformity of light shape brightness by using the technical scheme that "the lens structure has an optical axis, a light incident surface and a light emitting surface, the optical axis passes through the light incident surface and the light emitting surface, the light incident surface is opposite to the light emitting surface, the light incident surface has a protrusion, a first recess and a first flat portion, the protrusion corresponds to the optical axis, the first recess surrounds the protrusion, and the first flat portion surrounds the first recess".
For a better understanding of the features and technical content of the present invention, reference should be made to the following detailed description of the invention and accompanying drawings, which are provided for purposes of illustration and description only and are not intended to limit the invention.
Drawings
Fig. 1 is a graph of the illuminance of a typical flat lens flash device.
Fig. 2 is a schematic structural diagram of a light-emitting device according to a first embodiment of the invention.
Fig. 3 is a light distribution graph of the light emitting element of the light emitting device according to the first embodiment of the present invention.
Fig. 4 is a schematic view illustrating a usage state of the light emitting device according to the first embodiment of the present invention.
Fig. 5 is a luminance graph of the light emitting device according to the first embodiment of the present invention.
Fig. 6 is a first partial schematic view of a light-emitting device according to a first embodiment of the invention.
Fig. 7 is a second partial schematic view of a light-emitting device according to a first embodiment of the invention.
Fig. 8 is a schematic structural diagram of a lens structure of a light emitting device according to a second embodiment of the invention.
Detailed Description
The following description is provided for the embodiments of the "light emitting device and lens structure" disclosed in the present application by specific embodiments, and those skilled in the art can understand the advantages and effects of the present invention from the disclosure in the present application. The invention is capable of other and different embodiments and its several details are capable of modifications and various changes in detail, all without departing from the spirit and scope of the present invention. The drawings of the present invention are for illustrative purposes only and are not drawn to scale. The following embodiments will further explain the related art of the present invention in detail, but the disclosure is not intended to limit the scope of the present invention.
It will be understood that, although the terms first, second, third, etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are used primarily to distinguish one element from another. In addition, the term "or" as used herein should be taken to include any one or combination of more of the associated listed items as the case may be.
First embodiment
Fig. 2 to 7 are a schematic structural diagram, a light distribution graph, a usage state diagram, an illuminance diagram (or a light distribution diagram), a first partial diagram, and a second partial diagram of a light emitting device according to a first embodiment of the invention. As shown in the figure, the first embodiment of the present invention provides a light emitting device Z, which includes at least one light emitting element 1 and a lens structure 2. For example, the light emitting device Z of the present invention can be a flash structure, and can be applied to an electronic device (for example, but not limited to, a mobile phone, a flash device for a camera, or a handheld flash device).
As shown in fig. 2 to 7, the light-emitting element 1 of the present invention can be a light-emitting diode (LED), and the light intensity right in front of the light-emitting element 1 is the strongest (as shown in fig. 3); the light emitting device 1 may be a light emitting device with a primary lens, but not limited thereto. The light emitting element 1 may have a central axis 10 and a light emitting surface 11. The central axis 10 is perpendicular to the light-emitting surface 11. The light emitting surface 11 has a surface center point 11a, and the surface center point 11a is located on the central axis 10. In the present embodiment, one light emitting element 1 is taken as an example, but the present invention is not limited to this, and a plurality of light emitting elements 1 may be arranged in the light emitting device Z of the present invention in actual implementation.
Next, as shown in fig. 2, 4, 5 and 6, the lens structure 2 may have an optical axis 20, a light incident surface 21 and a light emitting surface 22. The optical axis 20 passes through the light incident surface 21 and the light emitting surface 22. The light incident surface 21 and the light emitting surface 22 are disposed opposite to each other, the light incident surface 21 faces at least one light emitting device 1, the light incident surface 21 may have a protrusion 210, a first recess 211 and a first flat portion 212, the protrusion 210 corresponds to the optical axis 20, the first recess 211 surrounds the protrusion 210, and the first flat portion 212 surrounds the first recess 211.
For example, with reference to fig. 2, 4, 6 and 7, the lens structure 2 can be a transparent lens structure with a top-bottom symmetry; the lens structure 2 may be a circular, square or other geometric bi-planar lens, and the thickness of the lens structure 2 may be 1mm, but not limited thereto. The body 23 of the lens structure 2 has a left and right surface (or a top and bottom surface), and a top and bottom surface (or a left and right surface), one surface of the body 23 is a light incident surface 21, and the other surface of the body 23 is a light emitting surface 22. The light incident surface 21 of the lens structure 2 faces the light emitting device 1, and the light emitting surface 22 faces away from the light emitting device 1. The optical axis 20 of the lens structure 2 is perpendicular to the light incident surface 21 and the light emitting surface 22 and corresponds to the center positions of the light incident surface 21 and the light emitting surface 22, and the optical axis 20 passes through the convex center position 210a of the convex portion 210. The optical axis 20 of the lens structure 2 overlaps the central axis 10 of the light-emitting element 1. In the present embodiment, the light emitting surface 22 of the lens structure 2 may be a plane, but not limited thereto.
Further, as shown in fig. 2 and 6, the first recess 211 may have a decreasing surface 211a and an increasing surface 211b, one end of the decreasing surface 211a is connected to the protrusion 210, the other end of the decreasing surface 211 is connected to one end of the increasing surface 211b with a joint 211c therebetween, and the other end of the increasing surface 211b is connected to the first flat portion 212. Also, the decreasing surface 211a may have a first curvature, and the increasing surface 211b has a second curvature, the first curvature being different from the second curvature; the first curvature and the second curvature may also be opposite to each other, for example, the first curvature is a positive curvature, and the second curvature is a negative curvature, but not limited thereto.
Therefore, as shown in fig. 2 to 5, when the light emitting surface 11 of the light emitting device 1 emits light, the light beam generated by the light emitting surface 11 is projected to the light incident surface 21 of the lens structure 2. At this time, the lens structure 2 can increase the incident angle of the light beam through the protrusion 210 structure of the light incident surface 21, so that the incident light quantity of the protrusion 210 is reduced, and the reflected light quantity of the protrusion 210 is increased; in addition, the lens structure 2 can reduce the incident angle of the large-angle light beam through the first concave portion 211 structure of the light incident surface 21, so as to increase the incident light amount of the first concave portion 211 and reduce the reflected light amount of the first concave portion 211. Then, the light beam generated by the light emitting device 1 passes through the light incident surface 21, the body 23 and the light emitting surface 22 of the lens structure 2 in sequence, and then is projected out from the light emitting surface 22 of the lens structure 2, and a light shape with uniform brightness is generated (as shown in fig. 5).
Further, referring to fig. 1 and 5, in fig. 1, the brightness percentages of the light pattern of the conventional flashlight device at the upper left, upper right, lower left, lower right, and center positions are 34%, 31%, 34%, 32%, and 100%, respectively; in a reverse view of fig. 5, the luminance percentages of the light pattern of the light-emitting device Z of the present invention at the positions of upper left, upper right, lower left, lower right, and center are 52%, 46%, 49%, 100% in this order. Therefore, as can be seen from fig. 1 and 5, the light shape generated by the lens structure 2 of the light emitting device Z of the present invention has more uniform brightness than the conventional flash lamp device using a general plane lens.
Therefore, according to the light emitting device Z of the present invention, through the above technical solution, the light incident angle is increased by using the structural design of the protruding portion 210 of the light incident surface 21 of the lens structure 2, so that the incident light amount is reduced, and the reflected light amount is increased; meanwhile, the incident angle of the large-angle light source can be reduced by the structural design of the first concave part 211, so that the incident light quantity is increased, the reflected light quantity is reduced, the divergence angle is facilitated, and better uniformity is obtained. More specifically, the lens structure 2 of the present invention has at least two curvature changes, so that the light output amount of the middle portion of the lens structure 2 is reduced, and conversely, the light output amount of the outer side (portion other than the middle portion) is increased and the angle is increased.
It is noted that in one of the preferred embodiments, the light-emitting device Z of the present invention may be provided with only one light-emitting element 1 and one lens structure 2.
Further, the junction 211c of the decreasing surface 211a and the increasing surface 211b is located within a light emitting angle range LR of the center point 11a, and the light emitting angle range LR may be between 0 degree and 30 degrees.
For example, in the embodiment shown in fig. 2 and fig. 6, in which the light emitting device 1 is a light emitting device with a primary lens, the surface center 11a of the light emitting surface 11 of the light emitting device 1 can generate a plurality of light beams L0, L1, L2, L3, and L4; the light beam L0 may be a light beam with an angle of 0, the light beam L1 is a light beam with an angle of 10 degrees, the light beam L2 is a light beam with an angle of 20 degrees, the light beam L3 is a light beam with an angle of 30 degrees, the light beam L4 is a light beam with an angle of 60 degrees, and the light beam L0 may be parallel to the optical axis 20 of the lens structure 2 and the central axis 10 of the light emitting device 1.
Moreover, the junction 211c of the decreasing surface 211a and the increasing surface 211b is located within the light emitting angle range LR formed by the two light beams L0, L3; preferably, the junction 211c is located in a light emitting angle range LR formed by the two light beams L1 and L2, i.e., the light emitting angle range LR may be between 10 degrees and 20 degrees. Therefore, through the structural design of the first concave part 211, the incident angle of the large-angle light source can be accurately reduced, the incident light quantity of the first concave part 211 is increased, the reflected light quantity is reduced, and better uniformity is obtained.
Furthermore, in another embodiment, the at least one light emitting element 1 of the present invention may further have a plurality of cell boundaries 12, the plurality of cell boundaries 12 being located on the same surface of the at least one light emitting element 1 as the face center point 11 a; one of the cell boundaries 12 has a projection angle range PR in which the incremental surface 211b is located, and the projection angle range PR may be between 0 degrees and 30 degrees.
For example, in the embodiment of fig. 2 and 7, the light emitting device 1 is a general light emitting diode (i.e. the light emitting device 1 does not have a primary lens); the cell boundary 12 may be an edge position of the light emitting surface 11, and thus, the cell boundary 12 and the surface center point 11a are located on the light emitting surface 11. When the light emitting device 1 is square, the cell boundary 12 may be a corner point of the light emitting device 1, or may be any position on an edge of one side of the light emitting device 1, but not limited thereto. The cell boundary 12 may have a plurality of virtual projected beams B0, B1, B2, B3, B4 with respect to the light incident surface 21 of the lens structure 2, the virtual projected beam B0 may be a virtual beam with an angle of 0, the virtual projected beam B1 is a virtual beam with 10 degrees, the virtual projected beam B2 is a virtual beam with 20 degrees, the virtual projected beam B3 is a virtual beam with 30 degrees, and the virtual projected beam B4 is a beam with 60 degrees; the virtual projected light beam B0 may be parallel to the optical axis 20 of the lens structure 2 and the central axis 10 of the light emitting device 1.
Moreover, the junction 211c of the decreasing surface 211a and the increasing surface 211B of the lens structure 2 can be located in the light emitting angle range LR formed by the two light beams L1, L2 of the light emitting element 1, and the increasing surface 211B is located in the projection angle range PR formed by the two virtual projected light beams B0, B3 of the light emitting element 1; preferably, the incremental surface 211B is included in a projection angle range PR formed by the two virtual projection beams B1, B2, i.e. the projection angle range PR may be between 10 degrees and 20 degrees. Therefore, through the structural design of the first concave part 211, the incident angle of the large-angle light source can be accurately reduced, the incident light quantity of the first concave part 211 is increased, the reflected light quantity is reduced, and better uniformity is obtained.
However, the above-mentioned example is only one possible embodiment and is not intended to limit the present invention.
Second embodiment
Fig. 8 is a schematic structural diagram of a lens structure of a light emitting device according to a second embodiment of the invention, and fig. 2 to 7 are also referred to. As shown in the drawings, the light emitting device Z of the present embodiment is substantially similar to the light emitting device Z of the previous embodiment, and therefore, the arrangement or operation of the same elements is not described herein again. The difference between the light emitting device Z of the present embodiment and the light emitting device Z of the first embodiment is that in the present embodiment, the light emitting surface 22 of the lens structure 2 may have a second concave portion 220 and a second flat portion 221, and the second flat portion 221 surrounds the second concave portion 220; the optical axis 20 passes through a recessed center 220a of the second recessed portion 220; wherein the first flat portion 212 and the second flat portion 221 are parallel to each other.
For example, as shown in fig. 2 and 8, the light-emitting surface 22 of the lens structure 2 may be non-planar. The central part of the light-emitting surface 22 may be a concave surface, and the periphery of the concave surface is a plane; that is, the central portion of the light emitting surface 22 is a second concave portion 220, the second concave portion 220 is connected to the second flat portion 221, and the second concave portion 220 corresponds to the convex portion 210. The recess center position 220a of the second recess 220 is located on the optical axis 20.
Therefore, the lens structure 2 of the present invention can increase the effect of dispersing the light beam by forming the second concave portion 220 on the light emitting surface 22.
However, the above-mentioned example is only one possible embodiment and is not intended to limit the present invention.
Advantageous effects of the embodiments
One of the benefits of the present invention is that the light emitting device Z provided by the present invention can improve the uniformity of light shape brightness by the technical scheme that "the lens structure 2 has the optical axis 20, the light incident surface 21 and the light emitting surface 22, the optical axis 20 passes through the light incident surface 21 and the light emitting surface 22, the light incident surface 21 faces at least one light emitting element 1, the light incident surface 21 has a protrusion 210, a first recess 211 and a first flat portion 212, the protrusion 210 corresponds to the optical axis 20, the first recess 211 surrounds the protrusion 210, and the first flat portion 212 surrounds the first recess 211".
One of the advantages of the present invention is that the lens structure 2 provided by the present invention can improve the uniformity of light shape brightness by the technical scheme that "the lens structure 2 has the optical axis 20, the light incident surface 21 and the light emitting surface 22, the optical axis 20 passes through the light incident surface 21 and the light emitting surface 22, the light incident surface 21 is disposed opposite to the light emitting surface 22, the light incident surface 21 has the protrusion 210, the first recess 211 and the first flat portion 212, the protrusion 210 corresponds to the optical axis 20, the first recess 211 surrounds the protrusion 210, and the first flat portion 212 surrounds the first recess 211".
Furthermore, according to the light emitting device Z of the present invention, by using the above technical solution, the light incident angle is increased by using the structural design of the protrusion 210 of the light incident surface 21 of the lens structure 2, so that the incident light amount is reduced, and the reflected light amount is increased; meanwhile, the incident angle of the large-angle light source can be reduced by the structural design of the first concave part 211, so that the incident light quantity is increased, the reflected light quantity is reduced, the divergence angle is facilitated, and better uniformity is obtained. More specifically, the lens structure 2 of the present invention has at least two curvature changes, so that the light output amount of the middle portion of the lens structure 2 is reduced, and conversely, the light output amount of the outer side (portion other than the middle portion) is increased and the angle is increased. In addition, the lens structure 2 of the present invention can further form the second concave portion 220 on the light emitting surface 22 to increase the effect of dispersing the light beam.
The disclosure is only a preferred embodiment of the invention, and is not intended to limit the scope of the claims, so that all technical equivalents and modifications using the contents of the specification and drawings are included in the scope of the claims.
Claims (10)
1. A light-emitting device, comprising:
at least one light emitting element; and
lens structure, lens structure has optical axis, income plain noodles and goes out the plain noodles, the optical axis passes go into the plain noodles and go out the plain noodles, go into the plain noodles with it sets up relatively to go out the plain noodles, it faces at least one to go into the plain noodles light emitting component, it has bellying, first depressed part and first flat portion to go into the plain noodles, the bellying corresponds to the optical axis, first depressed part centers on the bellying, just first flat portion centers on first depressed part.
2. The light-emitting device according to claim 1, wherein the first recess has a decreasing surface connected to the protrusion and the increasing surface, and an increasing surface connected to the first flat portion; wherein the decreasing surface has a first curvature and the increasing surface has a second curvature, the first curvature being different from the second curvature.
3. The lighting device of claim 2, wherein at least one of said light emitting elements has a face center point, said face center point being located on said optical axis; wherein the joint of the decreasing surface and the increasing surface is positioned in a light-emitting angle range of the center point of the surface, and the light-emitting angle range is between 0 degree and 30 degrees.
4. The lighting device as claimed in claim 3, wherein at least one of the light emitting elements has a plurality of cell boundaries, and the plurality of cell boundaries and the face center point are located on the same surface of at least one of the light emitting elements; one of the cell boundaries has a projection angle range, the incremental surface is located in the projection angle range, and the projection angle range is between 0 degrees and 30 degrees.
5. The light-emitting device according to claim 1, wherein the optical axis is perpendicular to the light incident surface and the light emitting surface, and the optical axis passes through a center of the protrusion.
6. The light-emitting device according to claim 3, wherein the light-emitting surface has a second recess and a second flat portion, the second flat portion surrounding the second recess; the optical axis penetrates through the concave center of the second concave part; wherein the first and second flat portions are parallel to each other.
7. The utility model provides a lens structure, its characterized in that, lens structure has optical axis, goes into plain noodles and goes out the plain noodles, the optical axis passes go into the plain noodles and go out the plain noodles, go into the plain noodles with it sets up relatively to go out the plain noodles, it has bellying, first depressed part and first flat portion to go into the plain noodles, the bellying corresponds to the optical axis, first depressed part centers on the bellying, first flat portion centers on first depressed part.
8. The lens structure of claim 7, wherein the first recess has a decreasing surface connected to the protrusion and the increasing surface, and an increasing surface connected to the first flat portion; wherein the decreasing surface has a first curvature and the increasing surface has a second curvature, the first curvature being different from the second curvature.
9. The lens structure of claim 8, wherein the optical axis is perpendicular to the light incident surface and the light emitting surface, and the optical axis passes through a center of the protrusion.
10. The lens structure of claim 7, wherein the light emitting surface has a second concave portion and a second flat portion, the second flat portion surrounding the second concave portion; the optical axis penetrates through the center of the second sunken part; wherein the first and second flat portions are parallel to each other.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210618469.6A CN114935867A (en) | 2022-06-01 | 2022-06-01 | Light emitting device and lens structure |
| TW111122107A TWI813336B (en) | 2022-06-01 | 2022-06-15 | Light-emitting device and lens structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210618469.6A CN114935867A (en) | 2022-06-01 | 2022-06-01 | Light emitting device and lens structure |
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| Publication Number | Publication Date |
|---|---|
| CN114935867A true CN114935867A (en) | 2022-08-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210618469.6A Pending CN114935867A (en) | 2022-06-01 | 2022-06-01 | Light emitting device and lens structure |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN114935867A (en) |
| TW (1) | TWI813336B (en) |
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Also Published As
| Publication number | Publication date |
|---|---|
| TW202349097A (en) | 2023-12-16 |
| TWI813336B (en) | 2023-08-21 |
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