CN106641750B

CN106641750B - Light mixing system

Info

Publication number: CN106641750B
Application number: CN201610926653.1A
Authority: CN
Inventors: 刘国旭
Original assignee: Shineon Beijing Technology Co Ltd
Current assignee: Shineon Beijing Technology Co Ltd
Priority date: 2016-10-31
Filing date: 2016-10-31
Publication date: 2023-10-13
Anticipated expiration: 2036-10-31
Also published as: CN106641750A

Abstract

The invention relates to a light mixing system, comprising: the LED lamp comprises a PCB, lamp beads, a main lens and an auxiliary part; the lamp beads are arranged on the PCB; the main lens is arranged above the lamp beads; the auxiliary part is arranged on the bottom periphery of the main lens on the PCB board, and the main lens and the auxiliary part are matched for use. The invention solves the problem of lamp bead side light leakage, reduces the risk of thermal deformation of the optical lens, and is favorable for thinning the backlight source.

Description

Light mixing system

Technical Field

The invention relates to the field of illumination, in particular to a light mixing system.

Background

The miniaturized LED packages, i.e., CSPs, are increasingly replacing the conventional 2835, 3030, 3014 and COB packages, and are increasingly used in lcd backlights and conventional lighting applications. CSP (Chip Scale Package) is a chip scale package, and the maximum external dimension of the package form is only 1.2 times of the chip size, so that gold wires and brackets in the traditional package are omitted, and the cost is greatly reduced while the package structure is optimized.

The CSP has small package size, the height is not more than 0.5mm, and the CSP emits light on five sides, and the light emitting mode increases the difficulty for matching the CSP with the design of the secondary optical lens: the bottom surface of the optical lens is required not to be higher than the light emitting surface of the CSP, otherwise, part of the light leaks out to generate stray light, as shown in fig. 1. Therefore, some people adopt a mode of surrounding white glue around CSP to change five-side light emission into one-side light emission, so that leakage detection is avoided when a secondary lens is used. However, as four sides of light are shielded, only one side emits light, the brightness and the light efficiency are reduced, meanwhile, the packaging step is added, the absorption and shielding of the white glue to light are incomplete, and part of stray light is still detected to leak.

Disclosure of Invention

The invention aims to provide a light mixing system, which solves the difficulty of lens design and the problem of lamp bead side light leakage.

The invention relates to a light mixing system, comprising:

a PCB board;

the lamp beads are arranged on the PCB;

the main lens is arranged above the lamp beads;

the auxiliary part is arranged on the PCB and at the periphery of the bottom of the main lens, and the main lens and the auxiliary part are matched for use, so that the leakage of the side light of the lamp bead is avoided.

Preferably, the main lens includes:

the annular bottom surface is the bottom of the main lens and is parallel to the upper surface of the PCB;

the annular concave free optical surface is arranged on the inner edge of the annular bottom surface;

the free optical curved surface of the annular bulge is arranged on the outer edge of the annular bottom surface;

and the cylinder is arranged below the annular bottom surface and is used for connecting the main lens and the PCB.

Preferably, the auxiliary part is an auxiliary lens comprising:

the auxiliary annular bottom surface is arranged parallel to the surface of the PCB;

the incidence free optical surface is arranged at the inner edge of the auxiliary annular bottom surface and is in an upward bulge shape;

the emergent free optical curved surface is arranged at the outer edge of the auxiliary annular bottom surface and is in an upward bulge shape;

the auxiliary cylinder is arranged below the auxiliary annular bottom surface and used for connecting the auxiliary lens with the PCB.

Preferably, the main lens is made of optical material, and the auxiliary lens is made of optical material or reflective material which is the same as or different from the main lens.

Preferably, the lamp beads, the main lenses and the auxiliary parts are the same in number and are installed in a one-to-one correspondence.

Preferably, the auxiliary part is an auxiliary light reflecting cup.

Preferably, the lamp beads are CSP lamp beads or LED lamp beads.

Preferably, the main lens receives the light beam ranging from-80 ° to 80 ° emitted from the lamp bead, and the auxiliary portion receives the light beam ranging from-80 ° to-90 ° and from 80 ° to 90 ° emitted from the lamp bead, with an upward direction perpendicular to the PCB board being 0 °.

The present invention has the advantage that,

1. the main lens and the auxiliary lens adopted by the light mixing system are matched for use, so that the problem of side light leakage caused by CSP five-sided light emission is avoided;

2. the refraction and reflection design mode of the auxiliary lens is adopted, so that the beam angle of the system is enlarged;

3. the main lens and the auxiliary lens are matched for use, so that the light mixing distance of the system is reduced, and the backlight source is thinned. Conventional 25mm can be reduced to 15mm or even lower.

4. The distance between the bottom of the main lens and the PCB is increased, and the risk of thermal deformation of the optical lens caused by overhigh heat is avoided.

5. The light mixing system has compatibility, the main lens and the auxiliary lens can be used separately, so that the re-mold opening and processing cost of other systems are avoided, and the cost is saved.

Drawings

FIG. 1 is a schematic view of the auxiliary lens structure of the auxiliary part of the present invention;

FIG. 2 is a schematic view of an auxiliary reflector cup according to the present invention;

FIG. 3 is a schematic diagram of an embodiment of the present invention;

FIG. 4 is a diagram of the overall optical effect of an embodiment of the present invention.

Detailed Description

As shown in fig. 1, a light mixing system of the present invention includes: PCB 003, lamp beads 005, main lens 001, and auxiliary part; the lamp beads 005 are arranged on the PCB 003; the main lens 001 is arranged above the lamp beads 005; the auxiliary part sets up the bottom periphery of main lens 001 on PCB board 003, and main lens 001 and auxiliary part cooperation are used, avoid lamp pearl 005 side light to leak outward.

The main lens 001 includes: an annular bottom surface 007, an annular concave free optical surface 003, an annular convex free optical curved surface 004, and a cylinder 006; the annular bottom surface 007 is the bottom of the main lens 001 and is parallel to the upper surface of the PCB 003; an annular concave free optical surface 003 disposed on an inner edge of annular bottom surface 007; an annular raised free optical curved surface 004 is provided on the outer edge of annular bottom surface 007; the cylinder 006 is disposed below the annular bottom surface 007 for connecting the main lens 001 to the PCB 003.

As shown in fig. 1, the auxiliary unit is an auxiliary lens 002 including: an auxiliary annular bottom surface 010, an incident free optical surface 009, an exit free optical curved surface 011, and an auxiliary cylinder 008; the auxiliary annular bottom surface 010 is arranged parallel to the surface of the PCB 003, and the incidence free optical surface 009 is arranged at the inner edge of the auxiliary annular bottom surface 010 and is in an upward convex shape; the emergent free optical curved surface 011 is arranged at the outer edge of the auxiliary annular bottom surface 010 and is in an upward bulge shape; the auxiliary cylinder 008 is disposed below the auxiliary annular bottom surface 010 for connecting the auxiliary portion with the PCB 003. The number of the lamp beads 005, the main lenses 001 and the auxiliary lenses 002 can be the same and are arranged in a one-to-one correspondence.

With the upward direction perpendicular to the PCB board being 0 °, the main lens 001 receives a light beam ranging from-80 ° to 80 ° from the lamp bead. The auxiliary portion receives light beams in the range of-90 DEG to-80 DEG and 80 DEG to 90 DEG from the CSP. The auxiliary part is an auxiliary lens 002, and the main lens 001 and the auxiliary lens 002 are used in combination. The main lens 001 is located in the inner space of the auxiliary lens 002, and expands the beam angle of the main lens by means of refraction and reflection. The main lens 001 and the auxiliary lens 002 are made of the same optical material, or two different optical materials, or the main lens is made of an optical material, and the auxiliary lens is made of a reflective material. The main lens 001 can also be used alone in combination with larger LED beads.

In the present invention, the lamp beads 005 may be CSP lamp beads or LED lamp beads.

As shown in fig. 2, the auxiliary part may also be an auxiliary light reflecting cup 012.

In a specific embodiment, as shown in fig. 3, the light mixing system is applied to a 32inch TV direct backlight. The light mixing system composed of 5 main lenses 001, 5 auxiliary lenses 002 and 5 CSP lamp beads is selected to be used, and 2 groups are adopted, namely 2 rows of 5 main lenses, 10 auxiliary lenses and 10 CSP lamp beads are adopted in each row. The overall optical effect is shown in fig. 4.

The main lens and the auxiliary lens adopted by the light mixing system are matched for use, so that the problem of side light leakage caused by the five-sided light emission of CSP lamp beads is avoided; the refraction and reflection design mode of the auxiliary lens is adopted, so that the beam angle of the system is enlarged; the main lens and the auxiliary lens are matched for use, so that the light mixing distance of the system is reduced, the thinning of the backlight source is facilitated, and the conventional 25mm can be reduced to 15mm or even lower.

Through the cylinder support, increased the distance of main lens bottom and PCB panel, avoided leading to the risk of optical lens thermal deformation because of the heat is too high.

The light mixing system has compatibility, the main lens and the auxiliary lens can be used separately, so that the re-mold opening and processing cost of other systems are avoided, and the cost is saved.

The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A light mixing system, comprising:

a PCB board;

the lamp beads are arranged on the PCB;

the main lens is arranged above the lamp beads;

the auxiliary part is arranged on the bottom periphery of the main lens on the PCB, and the main lens and the auxiliary part are matched for use, so that the leakage of the side light of the lamp bead is avoided;

the main lens includes:

the cylinder is arranged below the annular bottom surface and used for connecting the main lens with the PCB;

the main lens receives the light beams ranging from-80 degrees to 80 degrees emitted by the lamp beads, and the auxiliary part receives the light beams ranging from-80 degrees to-90 degrees and from 80 degrees to 90 degrees emitted by the lamp beads, wherein the upward direction perpendicular to the PCB is 0 degrees.

2. The light mixing system of claim 1 wherein the auxiliary portion is an auxiliary lens comprising:

3. A light mixing system as recited in claim 2 wherein the primary lens is an optical material and the secondary lens is an optical material or a reflective material that is the same as or different from the primary lens.

4. The light mixing system of claim 1 wherein the number of light bulbs, primary lenses, and auxiliary portions are the same and are mounted in a one-to-one correspondence.

5. The light mixing system of claim 1 wherein the auxiliary portion is an auxiliary reflector cup.

6. The light mixing system of any one of claims 1-5, wherein the beads are CSP beads or LED beads.