CN210860974U - Light mixing lens - Google Patents

Light mixing lens Download PDF

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Publication number
CN210860974U
CN210860974U CN201920825502.6U CN201920825502U CN210860974U CN 210860974 U CN210860974 U CN 210860974U CN 201920825502 U CN201920825502 U CN 201920825502U CN 210860974 U CN210860974 U CN 210860974U
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China
Prior art keywords
light
concave
edge
mixing lens
section
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CN201920825502.6U
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Chinese (zh)
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唐德龙
彭柏崴
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LEDINK OPTICS Inc
Dongguan Ledlink Optics Inc
Ledlink Optics Inc
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LEDINK OPTICS Inc
Dongguan Ledlink Optics Inc
Ledlink Optics Inc
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Abstract

A light mixing lens comprises a light incident side, a light emergent side and an annular side wall. The annular side wall is provided with a concave upper section and a concave lower section, and the first lower edge of the concave upper section is connected with the light inlet side. The second upper edge and the second lower edge of the concave lower section are respectively connected with the light-emitting side and the first upper edge of the concave upper section. The first inner reflecting surface of the concave upper section and the second inner reflecting surface of the concave lower section are provided with side concave parts, the side concave parts extend from the first lower edge to the second upper edge, and the side concave parts are provided with a first side edge, a second side edge and a reflecting concave surface connecting the first side edge and the second side edge. In a cross section of the side concave part, the length of a straight line between the first side edge and the second side edge is 2a, the distance between two different points on the straight line is L1, the distances from the two different points to one point on the reflection concave surface are L2 and L3 respectively, the sum of L2 and L3 is 2a, and 2a is larger than L1.

Description

Light mixing lens
Technical Field
The utility model relates to a lens especially relates to a mixed light lens.
Background
When the total internal reflection lens is designed for a wide illumination area, the light paths are crossed to achieve a larger illumination half angle by controlling the incident angle of the total internal reflection surface. The light mixing lens is designed in such a way that lights with different wavelengths are superposed to form white light, so that the light paths are designed to be focused towards the same position, and the lights with different wavelengths are focused at the same position. Due to the difference between the wide illumination area and the basic design principle of light mixing, the total internal reflection lens in the prior art can cause the problem of uneven light mixing due to too much light path crossing when designing for the wide illumination area of a multi-chip light source or a red, green, blue and white type color light source. Therefore, the prior art has not provided a lens that can satisfy both the requirements of light mixing and wide illumination area.
The background section is provided to aid in understanding the invention and therefore it is intended that all matter contained in the background section or disclosed herein may be interpreted to include any material that is not necessarily known to persons of ordinary skill in the art. Furthermore, the disclosure of the "background" is not intended to represent that item or the problem sought to be solved by one or more embodiments of the present invention, nor is it intended to be construed as being known or recognized by those of ordinary skill in the art prior to the filing of the present application.
SUMMERY OF THE UTILITY MODEL
The utility model provides a mixed light lens can compromise the mixed light and the wide area of illumination's demand to multi-chip light source or red green blue white type glory light source.
The utility model provides a mix light lens is including going into light side, light-emitting side and annular lateral wall. The annular side wall is connected between the light inlet side and the light outlet side and is provided with a concave upper section and a concave lower section, the concave upper section is provided with a first upper edge, a first lower edge and a first internal reflection surface connected between the first upper edge and the first lower edge, and the first lower edge is connected with the light inlet side. The concave lower section is provided with a second upper edge, a second lower edge and a second internal reflection surface connected between the second upper edge and the second lower edge, the second upper edge is connected with the light-emitting side, and the second lower edge is connected with the first upper edge. The first internal reflection surface and the second internal reflection surface are provided with a plurality of side concave parts, each side concave part extends from the first lower edge to the second upper edge, and each side concave part is provided with a first side edge, a second side edge and a reflection concave surface connected between the first side edge and the second side edge. In a cross section of each side concave part, a straight line with the length of 2a is formed between the first side edge and the second side edge, the distance between two different points on the straight line is L1, the distances from the two different points to one point on the reflection concave surface are L2 and L3 respectively, the sum of L2 and L3 is 2a, and 2a is larger than L1.
By the concave upper segment, concave lower segment and the side concave part of annular lateral wall, the light that multichip light source or red green blue white type glory light source sent is passing through the utility model discloses a can form the misce bene behind the mixed light lens and have wide irradiation area's the light-emitting. Therefore, the utility model discloses a mixed light lens can compromise the mixed light and the wide area of illumination's demand to multichip light source or red green blue white type glory light source.
The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical means of the present invention more clearly understood, the present invention may be implemented according to the content of the description, and in order to make the above and other objects, features, and advantages of the present invention more obvious and understandable, the following preferred embodiments are described in detail with reference to the accompanying drawings.
Drawings
Fig. 1 is a schematic perspective view of a light mixing lens according to an embodiment of the present invention;
fig. 2 is a schematic side plan view of a light mixing lens according to an embodiment of the present invention;
FIG. 3 is an enlarged view of area C of FIG. 2;
fig. 4 is a schematic bottom plan view of a light mixing lens according to an embodiment of the present invention;
FIG. 5 is a cross-sectional view taken along line D-D of FIG. 2;
FIG. 6 is an enlarged view of area E of FIG. 5;
fig. 7 is a schematic view illustrating a use of a light mixing lens according to an embodiment of the present invention; and
fig. 8 is a schematic top plan view of a light mixing lens according to an embodiment of the present invention.
Detailed Description
The foregoing and other features, aspects and utilities of the present invention will be apparent from the following more particular description of a preferred embodiment of the invention as illustrated in the accompanying drawings. Directional terms as referred to in the following examples, for example: upper, lower, top, bottom, side, etc. are referred to only in the orientation of the attached figures. Accordingly, the directional terminology is used for purposes of illustration and is in no way limiting.
Fig. 1 is a schematic perspective view of a light mixing lens according to an embodiment of the present invention. Fig. 2 is a schematic side view of a light mixing lens according to an embodiment of the present invention. Fig. 3 is an enlarged view of the region C in fig. 2. Fig. 4 is a schematic bottom plan view of a light mixing lens according to an embodiment of the present invention. Fig. 5 is a cross-sectional view taken along line D-D of fig. 2. Fig. 6 is an enlarged view of the region E in fig. 5. Fig. 7 is a schematic view illustrating a use of a light mixing lens according to an embodiment of the present invention. Referring to fig. 1 to 7, the light mixing lens 10 of the present embodiment includes a light incident side 110, a light emergent side 120 and an annular sidewall 130. The annular sidewall 130 is connected between the light incident side 110 and the light exiting side 120, and has a concave upper section 131 and a concave lower section 132. The concave upper section 131 has a first upper edge, a first lower edge and a first internal reflection surface 1311 connected between the first upper edge and the first lower edge, and the first lower edge is connected to the light incident side 110. The concave lower section 132 has a second upper edge, a second lower edge and a second internal reflection surface 1321 connected between the second upper edge and the second lower edge, the second upper edge is connected to the light-emitting side 120, and the second lower edge is connected to the first upper edge. The first inner reflective surface 1311 and the second inner reflective surface 1321 are provided with a plurality of side recesses 133, each side recess 133 extends from a first lower edge to a second upper edge, and each side recess 133 has a first side edge 1331, a second side edge 1332, and a concave reflective surface 1333 connected between the first side edge 1331 and the second side edge 1332. In the cross section of each side concave 133, the first side edge 1331 and the second side edge 1332 are connected to form a straight line, the length of the straight line is 2a, the distance between two different points A, B on the straight line is L1 (not shown in the figure), the distances between two different points A, B and a point P on the concave reflection surface 1333 are L2 (not shown in the figure) and L3 (not shown in the figure), the sum of L2 and L3 is 2a, and 2a is greater than L1; that is, in the cross section of each undercut 133, the relationship between the straight line formed by the connection between the first side edge 1331 and the second side edge 1332 and the concave reflection surface 1333 corresponds to the elliptic equation, and in the cross section of each undercut 133, the straight line formed by the connection between the first side edge 1331 and the second side edge 1332 and the concave reflection surface 1333 form a semielliptic shape. The first internal reflection surface 1311, the second internal reflection surface 1321, and the concave reflection surface 1333 are total reflection surfaces. In addition, the material of the light mixing lens 10 can be glass or plastic.
The light incident side 110 and the light emitting side 120 may be arranged along a first axis Z, the first axis Z, a second axis X and a third axis Y intersect at an intersection point and are perpendicular to each other, and a plane X-Y formed by the second axis X and the third axis Y intersects with each side concave portion 133 to form a cross section of each side concave portion 133. Further, a distance L1 between the first side edge 1331 and the second side edge 1332 of each side recess 133 gradually increases from the light exit side 120 toward the light entrance side 110.
The light incident side 110 may further include a bottom recess 111, and the bottom recess 111 extends from the light incident side 110 to the light exit side 120. The cross-section of the bottom recess 111 may be rectangular, circular, trapezoidal, triangular, etc. geometric or non-geometric. In the present embodiment, the bottom recess 111 may include a top surface 1111 and a ring side surface 1112, the ring side surface 1112 has two opposite ends, one end of the ring side surface 1112 is connected to the top surface 1111, the other end of the ring side surface 1112 surrounds a bottom opening 1113, and an aperture R1 of the bottom opening 1113 is larger than a diameter D1 of the top surface 1111. The aperture R1 of the bottom opening 1113 may be, for example, 9 millimeters (mm), and the diameter D1 of the top surface 1111 may be, for example, 8mm, but is not limited thereto.
The light-emitting side 120 may further include a top recess 121 and a light-emitting surface 122, the top recess 121 extends from the light-emitting side 120 to the light-entering side 110, and the light-emitting surface 122 is disposed around the top recess 121, the cross section of the top recess 121 may be a geometric shape or a non-geometric shape such as a rectangle, a circle, a trapezoid, a triangle, etc., in addition, the top recess 121 may further include a bottom surface 1211 and a ring side surface 1212, the ring side surface 1212 has opposite ends, one end of the ring side surface 1212 is connected to the bottom surface 1211, and the other end of the ring side surface 1212 surrounds to form a top opening 1213.
When the light mixing lens 10 of the present embodiment is used, the light source 20 can be disposed in the bottom concave portion 111, and the light emitted from the light source 20 enters the light mixing lens 10 from the light incident side 110 to generate a first refracted light that is refracted and forms a first refracted light heading towards the annular sidewall 130, and the first refracted light is totally reflected by the concave upper segment 131 and the concave lower segment 132 of the annular sidewall 130, so as to form a cross, a collimation, a divergence and the like, and is emitted from the light emitting surface 122. When the first refracted light on the plane YZ formed by the first axis Z and the third axis Y reaches the annular sidewall 130, the first refracted light is reflected in a direction parallel to the second axis X by the total reflection action of the side concave portion 133, and finally exits from the light exit surface 122. Therefore, through the action of the concave upper segment 131, the concave lower segment 132 and the side concave portion 133, after the light emitted from the multi-chip light source 20 or the red, green, blue and white color light source 20 enters the light mixing lens 10 of the present embodiment from the light incident side 110, different types of light advancing in different directions, such as crossing, collimating and diverging light, can be formed. Accordingly, the light emitted from the multi-chip light source 20 or the red, green, blue and white color light source 20 can form an emitting light (emitted from the light emitting side 122) with a wide emitting area and uniform mixing after passing through the light mixing lens 10 of the present embodiment. Therefore, the light mixing lens 10 of the present embodiment can satisfy both the light mixing and the wide illumination area requirements of the multi-chip light source 20 or the red, green, blue and white color light source 20. In addition, the total weight and the raw material of the light mixing lens 10 of the present embodiment can be reduced by the top concave portion 121. In addition, when the material of the light mixing lens 10 of the present embodiment is plastic, the molding cycle can be reduced.
Fig. 8 is a schematic top plan view of a light mixing lens according to an embodiment of the present invention. Referring to fig. 1, 7 and 8, the light mixing lens 10 of the present embodiment may further include a plurality of light diffusing microstructures 140 disposed on the light emitting side 120. The light diffusing microstructures 140 may be formed by printing or laser etching the light emitting side 120, but not limited thereto, the light diffusing microstructures 140 may also be formed on the light emitting side 120 by injection molding. The light diffusing microstructure 140 may have, for example, a hemispherical bump, a spherical crown bump, a rectangular parallelepiped bump, a hexagonal cube bump, a hemispherical pit, a spherical crown pit, a rectangular parallelepiped pit, a hexagonal cube pit, or the like, but the present invention is not limited thereto. In detail, in the present embodiment, the light diffusing microstructure 140 is disposed on the light emitting surface 122 of the light emitting side 120. In addition, the light diffusing microstructures 140 may be arranged in a honeycomb manner, but not limited thereto. The light diffusing microstructures 140 can destroy the total reflection of the light on the light emitting surface of the light mixing lens 10, increase the ratio of the light emitted from the light emitting side 120 of the light mixing lens 10, thereby increasing the brightness of the light emitting side 120, and simultaneously the light diffusing microstructures 140 can change the incident angle and the refraction angle of the light entering the air from the light emitting surface of the light mixing lens 10, thereby achieving the effects of re-diffusion and angle expansion.
To sum up, the utility model discloses mixed light lens, by concave upper segment, concave lower segment and undercut, can improve mixed light homogeneity and the area of shining of the light that multi-chip light source or red, green, blue and white type colored light source sent.
The above description is only a preferred embodiment of the present invention, and the present invention is not limited to the above description, and although the present invention has been disclosed with reference to the preferred embodiment, it is not limited to the present invention, and any skilled person in the art can make many modifications or equivalent variations by using the above disclosed method and technical contents without departing from the technical scope of the present invention, but all the simple modifications, equivalent variations and modifications made by the technical spirit of the present invention to the above embodiments are within the scope of the technical solution of the present invention.

Claims (10)

1. A light mixing lens, comprising:
a light incident side;
a light-emitting side; and
the annular side wall is connected between the light inlet side and the light outlet side and is provided with a concave upper section and a concave lower section, the concave upper section is provided with a first upper edge, a first lower edge and a first internal reflection surface connected between the first upper edge and the first lower edge, the first lower edge is connected with the light inlet side, the concave lower section is provided with a second upper edge, a second lower edge and a second internal reflection surface connected between the second upper edge and the second lower edge, the second upper edge is connected with the light outlet side, and the second lower edge is connected with the first upper edge;
a plurality of side concave parts are arranged on the first internal reflection surface and the second internal reflection surface, each side concave part extends from the first lower edge to the second upper edge, and each side concave part is provided with a first side edge, a second side edge and a reflection concave surface connected between the first side edge and the second side edge; and on a cross section of each of the plurality of side recesses, a straight line is formed between the first side edge and the second side edge, the length of the straight line is 2a, the distance between two different points on the straight line is L1, the distances from the two different points to one point on the reflecting concave surface are respectively L2 and L3, the sum of L2 and L3 is 2a, and 2a is greater than L1.
2. The light-mixing lens of claim 1, wherein the light-incident side and the light-exiting side are arranged along a first axis, the first axis, a second axis and a third axis intersect at an intersection point and are perpendicular to each other, and a plane formed by the second axis and the third axis intersects with each of the plurality of side concave portions to form the cross section of each of the plurality of side concave portions.
3. The light-mixing lens of claim 1, wherein a distance between the first side edge and the second side edge of each of the plurality of side concave portions gradually increases from the light-exiting side toward the light-entering side.
4. The light-mixing lens of claim 1, wherein the first internal reflection surface, the second internal reflection surface and the concave reflection surface are total reflection surfaces.
5. The light-mixing lens of claim 1, wherein the light-incident side further comprises a bottom recess extending from the light-incident side toward the light-exit side.
6. The light-mixing lens of claim 5, wherein the bottom concave portion further comprises a top surface and a ring side surface, the ring side surface has two opposite ends, one end of the ring side surface is connected to the top surface, the other end of the ring side surface surrounds a bottom opening, and the diameter of the bottom opening is larger than the diameter of the top surface.
7. The light-mixing lens of claim 1, wherein the light-exiting side further comprises a top concave portion and a light-exiting surface, the top concave portion extends from the light-exiting side to the light-entering side, and the light-exiting surface is disposed around the top concave portion.
8. The light-mixing lens of claim 7, wherein the top concave portion further includes a bottom surface and a ring side surface, the ring side surface has two opposite ends, one end of the ring side surface is connected to the bottom surface, the other end of the ring side surface surrounds a top opening, the aperture of the top opening is larger than the diameter of the bottom surface, and the light-emitting surface is disposed around the top opening of the top concave portion.
9. The light-mixing lens of claim 1, further comprising a plurality of light-diffusing microstructures disposed on the light-emitting side.
10. The light-mixing lens of claim 9, wherein the plurality of light-diffusing microstructures are arranged in a honeycomb pattern.
CN201920825502.6U 2019-06-03 2019-06-03 Light mixing lens Active CN210860974U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201920825502.6U CN210860974U (en) 2019-06-03 2019-06-03 Light mixing lens

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201920825502.6U CN210860974U (en) 2019-06-03 2019-06-03 Light mixing lens

Publications (1)

Publication Number Publication Date
CN210860974U true CN210860974U (en) 2020-06-26

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN201920825502.6U Active CN210860974U (en) 2019-06-03 2019-06-03 Light mixing lens

Country Status (1)

Country Link
CN (1) CN210860974U (en)

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