CN116105095A

CN116105095A - LED lens and light-emitting device thereof

Info

Publication number: CN116105095A
Application number: CN202310223535.4A
Authority: CN
Inventors: 周华; 赵靖
Original assignee: Shenzhen Zhaochi Guangyuan Technology Co ltd
Current assignee: Shenzhen Zhaochi Guangyuan Technology Co ltd
Priority date: 2023-02-28
Filing date: 2023-02-28
Publication date: 2023-05-12

Abstract

The invention provides a light-emitting diode lens and a light-emitting device thereof, wherein the light-emitting diode lens comprises an incidence part and an emergent part covered on the incidence part, the incidence part is covered on the light source device and is of an aspheric structure, the emergent part comprises a first emergent surface protruding away from the incidence part, a second emergent surface surrounding the first emergent surface and a third emergent surface connecting the first emergent surface and the second emergent surface, the first emergent surface and the second emergent surface adopt a convex structure, the third emergent surface adopts a plane structure, the second emergent surface extends towards the light-emitting unit to form a side emergent part, and the incidence part extends towards the side emergent part in an inclined way to form a bottom transmitting part.

Description

LED lens and light-emitting device thereof

Technical Field

The present invention relates to the field of optical lenses, and more particularly, to a light emitting diode lens and a light emitting device thereof.

Background

Along with the development of technology and the improvement of the living standard of substances, the pursuit experience of people on television sets is higher and higher, and the thin design and the good display effect are the necessary trend of the development of backlight sources. As a core device of a backlight source, mini LEDs have the advantages of ultrahigh contrast, wide color gamut, dynamic region dimming and the like, and have wide market prospect, and television head enterprises in 2022 have issued Mini LED televisions. The cost of the current Mini LED backlight television is higher than that of a common backlight television, and the cost of the current Mini LED backlight television is a key for popularizing the Mini LED backlight in the face of a price-sensitive consumer market. According to the research of the authority organization, the cost of the Mini LED backlight source accounts for over 60 percent in the Mini LED display product, and the light-emitting device accounts for a larger proportion in the cost of the Mini LED backlight source.

The main schemes in the market at present are Mini COB and Mini SMD schemes, and the problems of large number of LED components, small lamp spacing, high cost and the like exist.

Disclosure of Invention

Based on this, the main objective of the present invention is to provide a light emitting diode lens and a light emitting device thereof, which are mainly applied to Mini LED backlight modules, and can provide a light type with a light emitting angle greater than 140 °, and compared with COB and SMD schemes, the present invention can realize a larger lamp spacing, reduce the number of LED components of the backlight modules, and greatly reduce the backlight cost.

The utility model provides a light emitting diode lens for cover is established on the light source device, includes incident portion and cover locates the emergent portion on the incident portion, incident portion cover is located on the light source device, just the incident portion is aspheric structure, emergent portion is including keeping away from the first emergent face that the direction arch of incident portion set up, encircle the second emergent face that first emergent face set up and connect first emergent face and the third emergent face of second emergent face, first emergent face with the second emergent face adopts the convex structure, the third emergent face adopts planar structure, the second emergent face orientation the light-emitting unit extends to form the side transmission portion, incident portion orientation side transmission portion slope extends to form the bottom transmission portion, the emergent portion side transmission portion and the bottom transmission portion encloses into the light transmission face at no dead angle, the light that the light-emitting device sent is transmitted through incident portion side transmission portion and bottom transmission portion diverges.

Compared with the prior art, the invention has the beneficial effects that:

the LED lens adopts a multi-face light control design structure, the emergent part, the side-emergent part and the bottom-transparent part are approximately enclosed together to form a circle of circumference dead-angle-free light emergent surface, the light emergent surface is enlarged to realize larger lamp spacing, the number of LED components of the backlight module is reduced, and the backlight cost is greatly reduced.

Further, a column base is annularly arranged between the side injection part and the bottom penetration part.

Further, the bottom recess of the column base surrounds the column base to form a glue containing groove.

Further, a plurality of heat dissipation grooves are formed in the bottom penetrating portion of the column base, the heat dissipation grooves are arranged at intervals, and the depth of each heat dissipation groove is larger than that of the corresponding glue containing groove.

Furthermore, the incident part and the emergent part are arranged in a hollow way.

Furthermore, the whole light-emitting diode lens is of a rotationally symmetrical structure.

The invention also provides a light-emitting device which comprises a light source device and the light-emitting diode lens.

Further, the light source device comprises a substrate, a wafer arranged on the substrate and silica gel covered on the wafer, wherein the silica gel adopts an aspheric symmetrical structure.

Furthermore, the silica gel and the incidence part are arranged in a hollow mode.

Drawings

FIG. 1 is a cross-sectional view of a light emitting device of the present invention;

FIG. 2 is a bottom perspective view of the LED lens of FIG. 1;

FIG. 3 is a cross-sectional view of the toe in FIG. 1;

FIG. 4 is a cross-sectional view of the light source device of FIG. 1;

FIG. 5 is a light propagation path diagram of the light emitting device of FIG. 1;

main structural symbol description:

40. an incidence part; 10. an emission unit; 11. a first exit surface; 12. a third exit surface; 13. a second exit surface; 20. a side-emitting part; 30. a bottom penetration part; 50. a light source device; 51. a substrate; 52. wafer, 53, silica gel; 70. column feet; 75. a glue containing groove; 76. a heat sink.

The invention will be further described in the following detailed description in conjunction with the above-described figures.

Detailed Description

In order that the invention may be readily understood, a more complete description of the invention will be rendered by reference to the appended drawings. Several embodiments of the invention are presented in the figures. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "mounted" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1 to 3, a light emitting device according to an embodiment of the present invention includes a light emitting diode lens 60 and a light source device 50, wherein the light emitting diode lens 60 is configured to cover the light source device 50, and includes an incident portion 40 and an emitting portion 10 covered on the incident portion 40, the incident portion 40 is covered on the light source device 50, and the incident portion 40 has an aspheric structure, the emitting portion 10 includes a first emitting surface 11 protruding away from the incident portion 40, a second emitting surface 13 surrounding the first emitting surface 11, and a third emitting surface 12 connecting the first emitting surface 11 and the second emitting surface 13, the first emitting surface 11 and the second emitting surface 13 have a convex structure, the third emitting surface 12 has a planar structure, the second emitting surface 13 extends toward the light emitting unit to form a side emitting portion 20, the incident part 40 extends obliquely towards the side-emitting part 20 to form a bottom transmission part 30, the emergent part 10, the side-emitting part 20 and the bottom transmission part 30 enclose a dead-angle-free light transmission surface, light rays emitted by the light emitting device are emitted to the emergent part 10, the side-emitting part 20 and the bottom transmission part 30 through the incident part 40 to diverge, the light emitting diode lens 60 adopts a multi-surface light control design structure, the emergent part 10, the side-emitting part 20 and the bottom transmission part 30 enclose a circle of dead-angle-free light emission surface together approximately, a larger lamp distance can be realized by enlarging the light emission surface, the number of LED components of the backlight module is reduced, the backlight cost is greatly reduced, most of the light rays can be refracted out through the emergent part 10, a small part of the light rays can be reflected to the bottom transmission part 30, the light rays pass through the bottom transmission part 30, part will be refracted out, and part will be reflected to the emergent part 10, and this design structure is favorable to increasing the intensity of light, and the insufficient light intensity caused by increasing the emergent angle is prevented.

The emergent portion 10 adopts a convex, flat and convex three-section aspheric design structure, so that free diffusion of light can be realized.

The incident portion 40 and the emitting portion 10 are symmetrically designed, and a uniform and approximately symmetrical light pattern can be formed when the light source passes through the incident portion 40 and the emitting portion 10.

A post 70 is disposed between the side-emitting portion 20 and the bottom transparent portion 30, and the post 70 is used for supporting the led lens 60.

The bottom of the post 70 is recessed to form a glue containing groove 75 around the post 70, the glue containing grooves 75 are uniformly equal, the glue containing groove 75 is placed on glue in the process of attaching the lens after dispensing, and the post 70 on two sides of the glue containing groove 75 can guide the glue to flow so as to prevent the glue from overflowing.

The bottom penetrating portion 30 of the column base 70 is provided with a plurality of heat dissipation grooves 76, the heat dissipation grooves 76 are arranged at intervals, the depth of each heat dissipation groove 76 is greater than that of the corresponding glue containing groove 75, the heat dissipation grooves 76 are used for dissipating heat of the light-emitting diode lens 60 and serve as thimble positions of a lens mold, and the depth of each heat dissipation groove 76 is greater than that of the corresponding glue containing groove 75, so that glue caused by too shallow heat dissipation grooves 76 is prevented from filling the heat dissipation grooves 76, and heat dissipation efficiency is prevented from being affected.

The incident portion 40 and the emitting portion 10 are arranged in a hollow manner, so that the light source can emit light to any point of the emitting portion 10, the side emitting portion 20 and the bottom transmitting portion 30 through the incident portion 40, and a light type with a light emitting angle greater than 140 ° can be provided.

The light emitting diode lens 60 is integrally in a rotationally symmetrical structure, compared with a traditional lens, the lens adopts an ear-free design and is matched with a three-section column foot 70, after glue is injected in the lens pasting process, the glue containing groove 75 is aligned with the glue for placement, the direction of the column foot 70 is not required to be identified, and the lens can be directly pasted in any direction, so that blind pasting is realized.

Referring to fig. 4, the light source device 50 is disposed in the incident portion 40 and includes a substrate 51 disposed below, a wafer 52 disposed on an upper surface of the substrate 51, and a silica gel 53 disposed on the upper surface of the substrate 51 and surrounding the wafer 52, wherein a circuit is embedded in the substrate 51, the wafer 52 is used for emitting light, the silica gel 53 is used for emitting light, and the silica gel 53 adopts an aspheric symmetrical structure, so as to realize free diffusion of the light path.

The silica gel 53 and the incident portion 40 are arranged in a hollow manner, so that the light source emitted from the wafer 52 can be emitted to any point of the incident portion 40 through the silica gel 53, and the light source can be emitted to any point of the emergent portion 10, the side-emitting portion 20 and the bottom-transmitting portion 30 through the incident portion 40.

When the light emitting device is installed, the light source device 50 is placed at a predetermined position, the substrate 51 is fixed, then glue is dispensed at the position of the glue containing groove 75 according to the size of the light emitting diode lens 60, the post 70 of the light emitting diode lens 60 faces downwards, the glue containing groove 75 is aligned to the glue for placement, the light emitting diode lens 60 adopts a centrosymmetric design structure, so that blind attachment can be realized without identifying the position of the post 70, and the post 70 adopts a three-section design, when the glue dispensing position deviates from the predetermined position, the post 70 can guide the glue to flow, prevent the glue from overflowing, and have optical influence on the light emitting device.

Referring to fig. 5, when in use, the light source device 50 emits light through the wafer 52, and diverges toward the incident portion 40 through the silica gel 53, and the light source diverges toward the emitting portion 10, the side emitting portion 20 and the bottom transmitting portion 30 through the incident portion 40, and finally diverges from the surface of the led lens 60, because the light source device 50 and the led lens 60 are both of aspheric design structures, free diffusion of the light path can be achieved.

Because the surface of the silica gel 53 is hollow with the incident portion 40, the light source emitted from the wafer 52 can be emitted to any point of the incident portion 40 through the silica gel 53, and the surface of the incident portion 40 is hollow with the surfaces of the emitting portion 10, the side emitting portion 20 and the bottom transmitting portion 30, so that the light source can be emitted to any point of the emitting portion 10, the side emitting portion 20 and the bottom transmitting portion 30 through the incident portion 40.

Since the side light emitting portion 20 is inclined toward the bottom light transmitting portion 30, the bottom light transmitting portion 30 is inclined toward the light emitting portion 10, so that the light emitting surface can cover the shadow surface that shields the light due to the presence of the post 70, that is, the light emitting diode lens 60 can emit light without dead angle from the center of the central light emitting portion 10 to the end of the bottom light transmitting portion 30 connected to the light incident portion 40.

The light is emitted from the wafer and is refracted toward the emitting portion 10 by the incident portion 40, most of the light at the emitting portion 10 is refracted, a small part of the light is reflected to the bottom transmitting portion 30, the light is refracted toward the side emitting portion 20 and the bottom transmitting portion 30 from the incident portion 40, the light passing through the bottom transmitting portion 30 is refracted, and some of the light is reflected to the emitting portion 10.

The LED lens adopts a multi-surface light control design structure, can realize a light type with a light emitting angle larger than 140 degrees, enlarges a light emitting surface to realize larger lamp spacing, reduces the number of LED components of a backlight module, and greatly reduces backlight cost; because the light source device and the LED lens are both in symmetrical design structures, light patterns with uniform and approximately symmetrical light emission can be formed, compared with the traditional lens with the ear, the light emission is more uniform, and the light mixing effect between the LED components is better; the LED lens adopts a central symmetrical design structure, so that the direction does not need to be identified in the lens pasting process, the lens pasting efficiency can be greatly improved, and the manufacturing cost is reduced; finally, the LED lens adopts a three-section column base design, so that the problem of glue overflow can be solved, the optical influence of the glue on the light-emitting device is reduced, an effective way is provided for the cost reduction of Mini LED backlight, and the backlight requirement of the terminal market is met.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The foregoing examples illustrate only a few embodiments of the invention and are described in detail herein without thereby limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.

Claims

1. The utility model provides a light emitting diode lens for cover is established on the light source device, its characterized in that includes incident portion and cover locates the emergent portion on the incident portion, incident portion cover locates on the light source device, just incident portion is aspheric structure, emergent portion includes keeping away from the protruding first emergent face that sets up of direction of incident portion, encircle the second emergent face that first emergent face set up and connect first emergent face and the third emergent face of second emergent face, first emergent face and second emergent face adopt convex structure, the third emergent face adopts planar structure, the second emergent face towards the luminescence unit extends to form the side transmission portion, incident portion towards the slope of side transmission portion extends to form the bottom transmission portion, emergent portion side transmission portion and bottom transmission portion enclose into the light transmission face at no dead angle, the light that the light emitting device sent is transmitted to the emergent portion is transmitted to emergent portion, side transmission portion and bottom transmission portion carries out the divergence.

2. The led lens of claim 1, wherein a post is disposed annularly between the side emitter and the bottom transmitter.

3. The led lens of claim 2, wherein the bottom recess of the post forms a glue groove around the post.

4. A light emitting diode lens according to claim 3, wherein a plurality of heat dissipation grooves are formed in the bottom surface of the column base, the heat dissipation grooves are arranged at intervals, and the depth of the heat dissipation grooves is greater than that of the glue containing grooves.

5. The led lens of claim 1, wherein the entrance portion and the exit portion are hollow.

6. The led lens of claim 1, wherein the led lens is rotationally symmetrical as a whole.

7. A light-emitting device comprising a light source device and the light-emitting diode lens according to any one of claims 1 to 6.

8. The light-emitting device according to claim 7, wherein the light source device comprises a substrate, a wafer disposed on the substrate, and a silicone covering the wafer, and the silicone has an aspheric symmetrical structure.

9. The light-emitting device according to claim 8, wherein the silica gel is provided in a hollow space between the incident portion and the silica gel.