Optical lens module and light-emitting device thereof

Abstract

The utility model relates to the technical field of semiconductor luminescence, and discloses an optical lens module and a luminescent device thereof. The optical lens module comprises a lens and a supporting part. The lens is a convergent lens, and light can form a focus area under the action of the lens. The supporting part is arranged below the lens and used for supporting the lens. A cavity structure used for containing and light propagation is arranged in the supporting part. The supporting part is of a telescopic structure and is used for compensating migration of the focus area caused by temperature changes. The lens and the supporting part are made of different materials and are formed separately, the telescopic structure of the supporting part can compensate the influence of temperature on the refractive index of the lens, the problem of migration of a focus area can be solved, and high-precision measurement of a response area L is guaranteed. Meanwhile, the light-emitting device is stable and simple in overall structure, simple in manufacturing process and low in production cost.

Description

Technical Field

[0001] The utility model belongs to the technical field of semiconductor light emitting, and in particular relates to an optical lens module and a light emitting device thereof. Background Art

[0002] There are generally two methods of focusing light sources on the market:

[0003] Existing technology 1: A copper tube TO package solution, including a copper base, threaded focuser, lens, and copper cap. The lens is usually glass, and the entire structure provides relatively stable optical performance. However, the high cost of the package due to the high number of packaging materials and complex structure.

[0004] Existing technology 2: integrated lens solution, refer to Figure 5 , including a bracket 4, a light-emitting chip 3, a gold wire 5 and a lens 1. The optical function part and the support part (Holder) of the lens 1 are integrally molded by mold casting. On the one hand, the linear expansion of the entire structure of the lens 1 is large, which causes the surface of the optical function area to be easily deformed and fail under the influence of high temperature. On the other hand, the refractive index of the integrally molded resin material changes greatly under the influence of temperature, that is, the refractive index at high temperature, room temperature and low temperature are n1, n2 and n3 respectively, with n1 <n2<n3的特点。在高温或者低温条件下,出现焦点迁移现象,即焦点高于或者低于常温时焦点区S的高度,导致影响响应区L测量效果。

[0005] Based on the above, the current problem to be solved is: to provide an optical lens module and a light-emitting device thereof that can solve the focus migration problem caused by temperature changes, have accurate measurement and low cost. Utility Model Content

[0006] The purpose of the present invention is to provide an optical lens module and a light-emitting device thereof, aiming to solve the problems in the prior art of inaccurate measurement caused by focus migration of a converging light source due to temperature changes, as well as complex structure and high production cost.

[0007] The utility model is implemented as follows: an optical lens module, comprising:

[0008] A lens, which is a converging lens, through which light forms a focal area;

[0009] A support portion is provided below the lens for supporting the lens; a cavity structure for accommodating and transmitting light is provided inside the support portion; the support portion is a retractable structure for compensating for the migration of the focal area caused by temperature changes.

[0010] Further, the heights of the support part at high temperature, normal temperature, and low temperature are H1, H2, and H3 respectively, satisfying H1 > H2 > H3; the refractive indices of the lens at high temperature, normal temperature, and low temperature are n1, n2, and n3 respectively, satisfying n1 < n2 < n3; the height of the focal area is the same at low temperature, normal temperature, and high temperature.

[0011] Further, the focal length of the lens is 1 - 5 mm, and the diameter of the lens is less than 10 mm.

[0012] Further, the thermal expansion coefficient of the lens is less than that of the support part.

[0013] Further, the material of the support part is silicone resin; the material of the lens is one of silicone resin, epoxy resin, polycarbonate, acrylic, and glass.

[0014] Further, the lens includes an optical functional area in the middle and connecting ribs around it; the top of the support part (2) is provided with a groove matching the size of the connecting ribs, and the connecting ribs are connected to the groove.

[0015] Further, the inner wall of the support part is provided with an extension end, the extension end is connected to the bottom around the lens, and the extension end includes an anti-overflow groove on the top surface and a first inclined surface on the side surface.

[0016] Further, a second inclined surface is provided below the inner wall of the support part and the extension end, and the cross-section surrounded by the second inclined surface gradually becomes larger in the direction away from the extension end.

[0017] A light-emitting device, adopting any one of the above optical lens modules, further includes a bracket and a light-emitting chip arranged on the bracket; the bottom of the support part is connected to the bracket, and the light-emitting chip is arranged in the cavity structure.

[0018] Further, the side surfaces of the lens, the support part, and the bracket are parallel.

[0019] Compared with the prior art, the optical lens module and the light-emitting device provided by the present utility model have the following beneficial effects:

[0020] 1. In the prior art II, the lens 1 is integrally formed, while in the present invention, the lens 1 and the support portion 2 are made of different materials and are formed separately, so that the lens 1 and the support portion 2 have different characteristics. The support portion 2 is telescopic. Since the support portion 2 is not integrally provided with the lens 1, the expansion and contraction of the support portion 2 will not affect the surface shape of the lens 1, and the lens 1 has a stable optical shaping effect. The telescopic height of the support portion 2 can compensate for the influence of temperature on the refractive index of the lens 1, thereby solving the problem of the migration of the focal region S. The focal region S after the light acts on the lens 1 is not affected by temperature and is always in the response region L, ensuring high precision of the test.

[0021] 2. The extension end 23 of the present invention is provided with an anti-overflow groove 231 and a first inclined surface 232, which makes the combination of the lens 1 and the support portion 2 more firm and has better sealing performance. The first inclined surface 232 effectively prevents the excess adhesive medium from contaminating the lower optical interface of the lens 1 during the bonding process. The setting of the second inclined surface 24 is beneficial to demolding in the demolding process of forming the support portion 2.

[0022] 3. Compared with the prior art I, the present invention has the advantages of simple structure, simple manufacturing process and low production cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a three-dimensional structural schematic diagram of the light-emitting device provided by the present invention;

[0024] Figure 2 is a front view of the light-emitting device of the present invention;

[0025] Figure 3 is Figure 2 a sectional structural schematic diagram of the light-emitting device in the B-B direction;

[0026] Figure 4 is a light path comparison diagram of the light-emitting device of the present invention under high temperature, normal temperature and low temperature conditions;

[0027] Figure 5 a light path comparison diagram of the light-emitting device of the prior art II under high temperature, normal temperature and low temperature conditions;

[0028] In the figure: 1 - lens; 11 - optical functional area; 12 - connecting rib; 2 - support portion; 21 - cavity structure; 22 - groove; 23 - extension end; 231 - anti-overflow groove; 232 - first inclination; 24 - second inclined surface; 25 - protrusion; 26 - connecting surface; 3 - light-emitting chip; 4 - bracket; 5 - gold wire; S - focal region; L - response region; H - support portion reference line; K - lens reference line. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0029] In order to make the objectives, technical solutions and advantages of the present utility model more clearly understood, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0030] The implementation of the present utility model will be described in detail below with reference to specific embodiments.

[0031] In the accompanying drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components; in the description of the present utility model, it should be understood that if there are terms such as "upper", "lower", "left", "right", etc. indicating the orientation or positional relationship, they are based on the orientation or positional relationship shown in the accompanying drawings. This is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the positional relationship in the accompanying drawings are only for illustrative purposes and cannot be understood as a limitation of this patent. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0032] Refer to Figures 1-5 as shown, which is a preferred embodiment provided by the present utility model.

[0033] The optical lens module includes a lens 1 and a support portion 2. Refer to Figure 1 . The lens 1 is a converging lens 1, and light passing through the lens 1 will form a focal area S. The application scenario can be set with a response area L to detect the focal area S.

[0034] The support portion 2 is provided below the lens 1 and is used to support the lens 1 and connect to the bracket 4. The interior of the support portion 2 is provided with a cavity structure 21 for accommodating the light-emitting chip 3 and light propagation. The height of the support portion 2 is telescopable and is used to compensate for the migration of the focal area S caused by temperature changes.

[0035] The refractive index of the lens 1 changes with temperature, that is, the higher the temperature, the smaller the refractive index. Let the refractive indices at high temperature, normal temperature, and low temperature be n1, n2, and n3 respectively, and n1 < n2 < n3. Due to the change in refractive index, under the condition that the overall height of the lens 1 remains unchanged, the focal area S will migrate, that is, the focal area S at high temperature and low temperature will be higher or lower than the height of the focal area S formed at normal temperature respectively, and the response area L for testing the focal area S is set at the focal area S at normal temperature, so the test effect is not good at high temperature and low temperature.

[0036] The lens 1 and the support 2 of the present utility model are formed separately and then combined, and the support 2 is a telescopic structure. At high temperatures, the height of the support part 2 rises, and at low temperatures, the height of the support 2 drops, so as to compensate for the influence of temperature changes on the refractive index of the lens 1, so that the focal area S is always at the response area L, ensuring accurate test results. Preferably, the lens 1 is made of a material with a low coefficient of thermal expansion, and the support part 2 is made of a material with a high coefficient of thermal expansion, that is, the coefficient of thermal expansion of the lens 1 is less than that of the support part 2. The material of the support part 2 is preferably silicone resin. The material of the lens 1 is preferably one of silicone resin, epoxy resin, polycarbonate, acrylic and glass, and the refractive index of the lens 1 is preferably 1.45-1.65.

[0037] Specifically, referring to Figure 4 , the refractive indices of the lens 1 at high temperature, normal temperature and low temperature are: n1, n2, n3 respectively, satisfying n1 < n2 < n3. The material of the support part 2 is affected by temperature, that is, it expands at high temperature and contracts at low temperature. The heights at high temperature, normal temperature and low temperature are: H1, H2, H3 respectively, satisfying H1 > H2 > H3. At high temperature, the heights of the lens 1 and the support part 2 are respectively higher than the lens reference line K and higher than the support part reference line H. At low temperature, the heights of the lens 1 and the support part 2 are respectively lower than the lens reference line K and higher than the support part reference line H. The lens reference line K and the support part reference line H are based on the heights of the lens 1 and the support part 2 at normal temperature. The support part 2 can compensate for the change in refractive index caused by temperature, ensuring that the height of the focal area S is within the test range of the response area L at high temperature, normal temperature and low temperature, and the detection is accurate. Preferably, the focal length of the lens 1 is 1-5 mm, and the diameter of the lens 1 is less than 10 mm.

[0038] In a further optimized solution, the lens 1 includes an optical functional area 11 in the middle and connecting ribs 12 around it, referring to Figures 2-3 . The optical functional area 11 is used for optical shaping of light, including a lower optical interface for inputting light and an upper optical interface for outputting light. The connecting ribs 12 are used to connect with the support part 2 to make the bonding more firm. The support part 2 includes side walls around it and a cavity structure 21 surrounded by the side walls. At the top of the side walls of the support part 2, there are grooves 22 with dimensions matching those of the connecting ribs 12, and the connecting ribs 12 are bonded to the grooves 22. A number of grooves 22 and connecting ribs 12 can be provided, and preferably 4 are symmetrically arranged.

[0039] Furthermore, the inner wall of the support part 2 is provided with an extension end 23. The extension end 23 is connected to the bottom around the lens 1. The extension end 23 includes an anti-overflow groove 231 on the top surface and a first inclined surface 232 on the side surface. The anti-overflow groove 231 is used to increase the bonding area and improve airtightness. The first inclined surface 232 is used to guide the excess bonding medium to the bottom of the support part 2 to prevent contamination of the lower optical interface of the lens 1.

[0040] The inner wall of the support portion 2 and the lower part of the extension end 23 are provided with a second inclined surface 24. The cross-section surrounded by the second inclined surface 24 gradually becomes larger in the direction away from the extension end 23. When the support portion 2 is formed by a mold, the structure of the second inclined surface 24 is easy to demold.

[0041] Furthermore, the bottom of the support portion 2 includes an inner protrusion 25 and an outer connection surface 26. The connection surface 26 is connected to the top surface of the bracket 4. The protrusion 25 extends into the inner side of the bracket 4, and the protrusion 25 can increase the bonding area between the support portion 2 and the bracket 4 and improve the airtightness.

[0042] The light-emitting device using the optical lens module of the present invention further includes a bracket 4 and a light-emitting chip 3 provided on the bracket 4. According to the needs of the application scenario, the light-emitting chip 3 can be set singly or in several. When several light-emitting chips 3 are combined, the light-emitting colors of the light-emitting chips 3 can be the same or different. The types of the light-emitting chips 3 can be the same or different. The bottom of the support portion 2 is connected to the bracket 4, and the lens 1, the support portion 2 and the bracket 4 encapsulate the light-emitting chip 3 in the cavity structure 21. There is also a gold wire 5 for electrically connecting the light-emitting chip 3 and the bracket 4. Preferably, the sides of the lens 1, the support portion 2 and the bracket 4 are parallel, which is easy to cut, install and store.

[0043] It is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An optical lens module, characterized in that, Comprising: A lens (1), which is a converging lens (1), and light passing through the action of the lens (1) will form a focal region (S); A support portion (2), which is provided below the lens (1) for supporting the lens (1); a cavity structure (21) for accommodating and light propagation is provided inside the support portion (2); the support portion (2) is a telescopic structure for compensating for the migration of the focal region (S) caused by temperature changes.

2. The optical lens module according to claim 1, characterized in that, The heights of the support portion (2) at high temperature, normal temperature, and low temperature are H1, H2, and H3 respectively, satisfying H1 > H2 > H3; the refractive indices of the lens (1) at high temperature, normal temperature, and low temperature are n1, n2, and n3 respectively, satisfying n1 < n2 < n3; the height of the focal region (S) is the same at low temperature, normal temperature, and high temperature.

3. The optical lens module according to claim 1, wherein, The focal length of the lens (1) is 1 - 5 mm, and the diameter of the lens (1) is less than 10 mm.

4. The optical lens module according to claim 1, wherein The thermal expansion coefficient of the lens (1) is less than that of the support portion (2).

5. The optical lens module according to claim 4, wherein The material of the support portion (2) is silicone resin; the material of the lens (1) is one of silicone resin, epoxy resin, polycarbonate, acrylic, and glass.

6. The optical lens module according to claim 1, wherein, The lens (1) includes an optical functional region (11) in the middle and connecting ribs (12) around; a groove (22) matching the size of the connecting ribs (12) is provided at the top of the support portion (2), and the connecting ribs (12) are connected to the groove (22).

7. The optical lens module according to claim 1, wherein An extension end (23) is provided on the inner wall of the support portion (2), and the extension end (23) is connected to the bottom around of the lens (1). The extension end (23) includes an anti-overflow groove (231) on the top surface and a first inclined surface (232) on the side surface.

8. The optical lens module according to claim 7, wherein, A second inclined surface (24) is provided below the inner wall of the support portion (2) and the extension end (23), and the cross-section surrounded by the second inclined surface (24) gradually becomes larger in the direction away from the extension end (23).

9. A light-emitting device, characterized in that, Adopting the optical lens module according to any one of claims 1 - 8, further comprising a bracket (4) and a light-emitting chip (3) provided on the bracket (4); the bottom of the support portion (2) is connected to the bracket (4), and the light-emitting chip (3) is provided inside the cavity structure (21).

10. The light-emitting device according to claim 9, wherein, The side surface of the lens (1), the side surface of the support portion (2), and the side surface of the bracket (4) are parallel.

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