TW202022417A - Optical lens and light source module - Google Patents

Abstract

An optical lens and a light source module are provided. The optical lens includes a light incident portion and a light guiding portion. The light incident portion includes two back optical surfaces, a first light incident surface, and two second light incident surfaces. The light guiding portion has a plurality of light guiding branches and the light guiding branches extend along different extending directions, wherein each of the light guiding branches has a main light emitting surface, and the first light incident surface and the second light incident surface face the main light emitting surfaces of the light guiding branches, respectively.

Description

Optical lens and light source module

The present invention relates to an optical lens and a light source module, and particularly relates to an optical lens and a light source module with multiple light emitting points.

In recent years, with the improvement of the luminous efficiency and lifespan of Light Emitting Diode (LED), coupled with low energy consumption, low pollution, high efficiency, high response speed, small size, light weight and can be used on various surfaces Features and advantages of components such as settings, light-emitting diodes have also been actively used in various optical fields. Taking the application of light-emitting diodes for lighting purposes as an example, many applications of light-emitting diode packaging structures for light sources (such as bulbs, street lamps, flashlights, etc.) or related lighting equipment have been developed.

However, since the light-emitting diode is a directional light source, the light will only be emitted in a specific direction in the form of a point light source. Therefore, when the light-emitting diode is used in existing outdoor lighting equipment, such as street lamps and the like , It is easy to cause dazzling glare due to the concentrated light energy on one point in the light-emitting axis. Moreover, since the light provided by the light-emitting diode is also limited in energy distribution, when the light-emitting diode is applied to the existing outdoor lighting equipment, there is an urgent need for a design solution that can make the light-emitting diode The provided light can be guided from a single spot to multiple surfaces, and combined with a controllable light structure to effectively distribute the light energy on the surface of the road to be illuminated.

The present invention provides an optical lens which can guide light to form a plurality of scattered light emitting points.

The present invention provides a light source module, which has multiple light emitting points, eliminates glare, and can achieve good light distribution characteristics.

An optical lens of the present invention includes a light incident part and a light guide part. The light incident part includes two rearward optical surfaces, a first light incident surface, and two second light incident surfaces. Each second light incident surface has a first side and a second side opposite to each other. The first light-incident surface is connected to each second light-incident surface via the first side of each second light-incident surface. Each rearward optical surface is connected to each second light incident surface via a second side edge of each second light incident surface. The light guide portion has a plurality of light guide part branches which extend along different extension directions, wherein each light guide part branch has a main light exit surface, the first light entrance surface and the second light entrance surfaces respectively Face the main light-emitting surfaces of the light guide parts.

In an embodiment of the present invention, the above-mentioned optical lens has a top surface, a bottom surface, and a plurality of side surfaces, wherein the top surface is opposite to the bottom surface, and the top surface is connected to the bottom surface via these side surfaces, and the top surface The surface has a plurality of top surface branches, and the bottom surface has a plurality of bottom surface branches. The bottom surface branches correspond to the top surface branches, and the surface of one of the light guide parts is branched from one of the top surface branches corresponding to each other It is formed by branching from the bottom surface and part of these side surfaces.

In an embodiment of the present invention, the contours of the orthographic projection of the top surface and the bottom surface on a reference plane are similar to each other, and the contour area of the orthographic projection of the top surface on the reference plane is smaller than that of the bottom surface on the reference plane. The area of the contour of the orthographic projection.

In an embodiment of the present invention, the above-mentioned top surface and bottom surface both have a T-shaped profile.

In an embodiment of the present invention, the above-mentioned side surface facing the first light incident surface or each second light incident surface is the main light output surface of each light guide part, and the main light output surface of each light guide part is trapezoidal.

In an embodiment of the present invention, the aforementioned bottom surface is connected with the rearward optical surfaces, the first light incident surface, and the second light incident surfaces, and forms an accommodating space.

In an embodiment of the present invention, the aforementioned backward optical surface is perpendicular to the bottom surface.

In an embodiment of the present invention, there is a first included angle between the first light incident surface and the bottom surface, and the first included angle is between 90° and 160°.

In an embodiment of the present invention, each of the aforementioned side surfaces and the bottom surface has a second included angle, and the second included angle is between 20° and 90°.

A light source module of the present invention includes at least one light emitting unit, and each light emitting unit includes the aforementioned optical lens and a light emitting element. The light emitting element is adapted to provide a light beam, wherein the light beam enters the optical lens through the first light entrance surface and the second light entrance surfaces of the optical lens, and the light beam leaves the optical lens from the main light exit surface branched from the light guide part.

In an embodiment of the present invention, the number of the above-mentioned at least one light-emitting unit is multiple, and the light-emitting units are arranged in a staggered manner to form an array.

Based on the above, the light source module of the present invention can control the axis and position of the light exit by the arrangement of the light entrance part of the optical lens and the light guide part of the light guide part, thereby achieving the purpose of dispersing the light. In addition, the light source module can also control and adjust the light shape of the light, so that the light provided by the light-emitting diode can be guided and distributed to the outside world effectively, thereby eliminating glare and achieving good The light distribution characteristics, and is beneficial to be used in outdoor lighting equipment such as street lamps and the like.

In order to make the above-mentioned features and advantages of the present invention more obvious and understandable, the embodiments are specifically described below and described in detail in conjunction with the accompanying drawings.

FIG. 1A is a perspective view of a light source module according to an embodiment of the invention. FIG. 1B is a schematic diagram of the structure of the light incident part of the light source module of FIG. 1A. 1A and 1B, the light source module 300 includes at least one light emitting unit 200, and each light emitting unit 200 includes an optical lens 100 and a light emitting element 210. For example, in this embodiment, the light-emitting element 210 may be a light-emitting diode, which is suitable for providing a light beam.

Specifically, as shown in FIGS. 1A and 1B, in this embodiment, the optical lens 100 includes a light incident portion 110 and a light guide portion 120. The light incident portion 110 includes two rear optical surfaces S113 for achieving total reflection, a first light incident surface S111, and two second light incident surfaces S112. Each second light incident surface S112 has a first side S112a and a second side S112b opposite to each other. The first light incident surface S111 is connected to each second light incident surface S112 via a first side S112a of each second light incident surface S112. Each rearward optical surface S113 is connected to each second light incident surface S112 via a second side S112b of each second light incident surface S112. As shown in FIG. 1A, in this embodiment, the light beam provided by the light emitting element 210 mainly passes through the first light incident surface S111 and these second light incident surfaces S112 of the optical lens 100, or part of the light beam also passes through the backward direction. The optical surface S113 enters the optical lens 100.

On the other hand, as shown in FIG. 1A, in this embodiment, the light guide portion 120 has a plurality of light guide partial branches 121, 122, 123, and these light guide partial branches 121, 122, 123 extend along different extension directions. . For example, in this embodiment, the light guide portion 120 includes a first light guide part branch 121, a second light guide part branch 122, and a third light guide part branch 123. Extending in a first direction D1, the second light guide portion 122 extends along a second direction D2, and the third light guide portion 123 extends along a third direction D3. In this embodiment, the first direction D1 is, for example, parallel to the Y direction, and the second direction D2 and the third direction D3 are, for example, parallel to the X direction. In more detail, in this embodiment, the first direction D1 faces the +Y direction, the second direction D2 faces the +X direction, and the third direction D3 faces the −X direction. In other words, the first direction D1 is perpendicular to the second direction D2 or the third direction D3, and the directions of the second direction D2 and the third direction D3 are parallel and opposite to each other, but the present invention is not limited thereto.

In addition, as shown in FIG. 1A, in this embodiment, each light guide portion 121, 122, 123 respectively has a main light-emitting surface MS, and the first light-incident surface S111 and the second light-incident surfaces S112 are connected to the light guides respectively. The main light emitting surfaces MS of the light branches 121, 122, 123 face each other. In this way, when the light beam provided by the light emitting element 210 enters the light guide portion 120, it will be transmitted along the first direction D1, the second direction D2, and the third direction D3 in the light guide parts 121, 122, 123, respectively. In this way, the light beam provided by the light-emitting element 210 mainly travels to the main light-emitting surface MS of each light guide section 121, 122, 123 and then leaves the optical lens 100, while a small part of the light beam leaves the optical lens 100 via the side surface SS.

In this way, the light source module 300 can control the axis and position of the light outgoing light by the arrangement of the light entrance portion 110 of the optical lens 100 and the light guide portions 121, 122, and 123 of the light guide portion 120, thereby achieving The purpose of dispersing light. In addition, the light source module 300 can also control and adjust the light shape of the outgoing light, so that the point light source light provided by the light-emitting diode can be guided and thereby effectively and evenly distributed into a surface light source to the outside world. Eliminate glare and achieve good light distribution characteristics, which is beneficial to be used in outdoor lighting equipment such as street lamps and the like. The following will further explain in conjunction with FIGS. 2A to 4B.

FIG. 2A is a top view of the light source module of FIG. 1A. FIG. 2B is a front view of the light source module of FIG. 1A. FIG. 2C is a side view of the light source module of FIG. 1A. 3A is a cross-sectional view of the light source module of FIG. 2A along the line A-A. 3B is a cross-sectional view of the light source module of FIG. 2A along the line B-B. 3C is a cross-sectional view of the light guide part of the light source module of FIG. 2B along the line C-C. As shown in FIGS. 2A to 3C, in this embodiment, the optical lens 100 has a top surface TS, a bottom surface BS, and a plurality of side surfaces SS. The top surface TS is opposite to the bottom surface BS, and the top surface TS passes through These side surfaces SS are connected to the bottom surface BS.

Specifically, as shown in FIGS. 2A to 3C, in this embodiment, the bottom surface BS is connected to the rearward optical surface S113, the first light incident surface S111, and these second light incident surfaces S112 of the light incident portion 110 , And form an accommodating space, which can be used to accommodate the light-emitting element 210. And, for example, in this embodiment, as shown in FIG. 2C and FIG. 3A, the rearward optical surface S113 is perpendicular to the bottom surface BS. In this way, when the light beam provided by the light emitting element 210 is refracted by penetrating the rearward optical surface S113, it will be reflected at the vertical surface behind the optical lens 100 at a total reflection angle. In this way, through the above-mentioned angle design and configuration, the optical lens 100 can control and reduce the proportion of the light beam provided by the light-emitting element 210 that emits light backward (ie, the -Y direction).

On the other hand, as shown in FIG. 2A, the top surface TS of the optical lens 100 has a plurality of top surface branches TS1, TS2, TS3, and the bottom surface BS has a plurality of bottom surface branches BS1, BS2, BS3, and these bottom surface branches BS1, BS2, BS3 correspond to the top surface branches TS1, TS2, TS3, respectively, and the surface of the first light guide portion 121 is composed of one of the top surface branch TS1 and the bottom surface branch BS1 corresponding to each other, and part of these side surfaces SS Formed. Similarly, the surface of the second light guide portion 122 is also formed by one of the top surface branches TS2, the bottom surface branch BS2 and some of these side surfaces SS corresponding to each other, and the surface of the third light guide portion 123 is also formed It is formed by one of the top surface branch TS3 and the bottom surface branch BS3 corresponding to each other and part of these side surfaces SS.

In more detail, as shown in FIG. 2A, in this embodiment, the contours of the orthographic projection of the top surface TS and the bottom surface BS on a reference plane are similar to each other. For example, in this embodiment, the reference plane is, for example, an XY plane, and both the top surface TS and the bottom surface BS have a T-shaped profile. And, as shown in FIG. 2A, in this embodiment, the area of the contour of the orthographic projection of the top surface TS on the reference plane is smaller than the area of the contour of the orthographic projection of the bottom surface BS on the reference plane. In other words, as shown in FIGS. 2A to 2C, in this embodiment, the contours of the light guide portions 121, 122, and 123 of the light guide portion 120 are tapered toward the +Z direction.

On the other hand, as shown in FIG. 1A and FIG. 2A, in this embodiment, the side surface SS facing the first light incident surface S111 or each second light incident surface S112 is the side surface SS of each light guide portion 121, 122, 123 The main light-emitting surface MS. Specifically, as described above, in this embodiment, the light entering the optical lens 100 from the first light incident surface S111 or each second light incident surface S112 will branch 121, 122, 123 from these light guide parts. The main light-emitting surface MS emits light. For example, as shown in FIG. 2A, in this embodiment, the main light-emitting surface MS of each light guide portion 121, 122, 123 is trapezoidal. Moreover, in this embodiment, as shown in FIGS. 2C and 3A, there is a first angle θ1 between the first light incident surface S111 and the bottom surface BS, and the first angle θ1 is between 90° and 160°. On the other hand, as shown in FIGS. 2B and 2C, in this embodiment, there is a second included angle θ2 between each side surface SS and the bottom surface BS, and the second included angle θ2 is between 20° and 90°. Moreover, as shown in FIGS. 2B and 2C, in this embodiment, each side surface SS and the corresponding top surface branch TS1, TS2, TS3 respectively have a third included angle θ3. In this embodiment, the third included angle θ3 is, for example, 130 degrees, but the present invention is not limited to this. In other embodiments, the third included angle θ3 can also be other angles between 90° and 175° .

In this way, with the above configuration, the optical lens 100 can control and adjust the left and right (ie ±X direction) and forward (ie +Y direction) illumination angles of the light beam provided by the light-emitting element 210, and can be used to control and adjust the light source. The light shape distribution of the module 300.

4A is a light distribution diagram of the light source module of FIG. 1A in the X direction, and FIG. 4B is a light distribution diagram of the light source module of FIG. 1A in the Y direction, where the radial directions in FIGS. 4A and 4B represent The physical quantity is candlelight, and the circumferential direction is the angle of each azimuth on the XY plane, where the azimuth angle in the +X direction is 0°. As shown in FIG. 4A, in this embodiment, the angular range shown in the circumferential direction of FIG. 4A is 0° to 180°, so the light distribution shown in FIG. 4A is that the light source module 300 is on the left and right sides (ie ± X direction) of the light shape distribution. On the other hand, as shown in FIG. 4B, in this embodiment, the angular range shown in the circumferential direction of FIG. 4B is 90° to 270°. Therefore, the light distribution shown in FIG. The light distribution on the side (ie ±Y direction). As shown in Figs. 4A and 4B, in this embodiment, the proportion of the light shape distribution of the optical lens 100 toward the rear (ie -Y direction) can be greatly reduced, and concentrated to the left and right (ie ±X direction) and forward ( That is, the +Y direction) emits light. Moreover, as mentioned above, the light source module 300 can also be controlled and adjusted by the angle design of the optical lens 100 to adjust the light distribution on the left and right (ie ±X direction) and front (ie +Y direction), so that the light source model The lighting angle of the group 300 meets the requirements.

In this way, the light source module 300 can control the axis and position of the light outgoing light by the arrangement of the light entrance portion 110 of the optical lens 100 and the light guide portions 121, 122, and 123 of the light guide portion 120, thereby achieving The purpose of dispersing light. In addition, the light source module 300 can also control and adjust the light shape of the light, so that the light provided by the light-emitting diode can be guided and distributed to the outside world effectively, thereby eliminating glare and achieving Good light distribution characteristics, and is beneficial to be used in outdoor lighting equipment such as street lamps and the like.

5A to 5C are schematic structural diagrams of another light source module according to an embodiment of the invention. The light source module 400 of FIGS. 5A to 5C is similar to the light source module 300 of FIG. 1A, but the differences are as follows. As shown in FIGS. 5A to 5C, in this embodiment, the number of at least one light emitting unit 200 of the light source module 400 is multiple, and the light emitting units 200 are arranged in a staggered manner to form an array. In more detail, as shown in FIG. 5C, the light-emitting units 200 are arranged in multiple rows, and the positions of the light-emitting units 200 in two adjacent rows are alternately shifted to form a staggered arrangement. In this way, the arrangement of the light-emitting units 200 can be completed by matching the outline of the light-emitting units 200 in a tighter and economical manner, but the invention is not limited thereto. In other embodiments, the light emitting unit 200 can also be formed in other arrangements.

Moreover, since the light source module 400 of FIGS. 5A to 5C is similar to the light source module 300 of FIG. 1A, it can be supported by the light incident portion 110 of the optical lens 100 and the light guide portions 121, 122, and 120 of the light guide portion 120. The configuration of 123 achieves the same function, so the light source module 400 can achieve similar effects and advantages to the aforementioned light source module 300, which will not be repeated here.

In summary, the light source module of the present invention can control the axis and position of the light exiting light by the arrangement of the light entrance part of the optical lens and the light guide part of the light guide part, thereby achieving the purpose of dispersing light. In addition, the light source module can also control and adjust the light shape of the light, so that the light provided by the light-emitting diode can be guided and distributed to the outside world effectively, thereby eliminating glare and achieving good The light distribution characteristics, and is beneficial to be used in outdoor lighting equipment such as street lamps and the like.

Although the present invention has been disclosed as above by the embodiments, it is not intended to limit the present invention. Any person with ordinary knowledge in the technical field can make some changes and modifications without departing from the spirit and scope of the present invention. The scope of protection of the present invention shall be subject to the scope defined in the appended patent application.

100: optical lens 110: light incident part 120: light guide part 121: first light guide part 122: second light guide part 123: third light guide part 200: light-emitting unit 210: light-emitting elements 300, 400: Light source module BS: bottom surface BS1, BS2, BS3: bottom surface branch D1: first direction D2: second direction D3: third direction MS: main light exit surface S111: first light entrance surface S112: second light entrance surface S112a: first side S112b: second side S113: rearward optical surface SS: side surface TS: top surface TS1, TS2, TS3: top surface branch θ1: first included angle θ2: second included angle θ3: third included angle X, Y, Z: direction

FIG. 1A is a perspective view of a light source module according to an embodiment of the invention. FIG. 1B is a schematic diagram of the structure of the light incident part of the light source module of FIG. 1A. FIG. 2A is a top view of the light source module of FIG. 1A. FIG. 2B is a front view of the light source module of FIG. 1A. FIG. 2C is a side view of the light source module of FIG. 1A. 3A is a cross-sectional view of the light source module of FIG. 2A along the line A-A. 3B is a cross-sectional view of the light source module of FIG. 2A along the line B-B. 3C is a cross-sectional view of the light guide part of the light source module of FIG. 2B along the line C-C. 4A is a light distribution diagram of the light source module of FIG. 1A in the X direction. 4B is a light distribution diagram of the light source module in FIG. 1A in the Y direction. 5A to 5C are schematic structural diagrams of another light source module according to an embodiment of the invention.

100: optical lens

110: Light incident

120: Light guide

121: The first light guide part

122: The second light guide part

123: The third light guide part

200: light-emitting unit

210: light-emitting element

300: light source module

D1: First direction

D2: Second direction

D3: Third direction

MS: Main light emitting surface

X, Y, Z: direction

Claims (11)

An optical lens comprising: a light incident part, comprising; two rearward optical surfaces; a first light incident surface; and two second light incident surfaces, wherein each of the second light incident surfaces has a first side edge opposite to each other With a second side, the first light-incident surface is connected to each of the second light-incident surfaces via the first side of each of the second light-incident surfaces, and each of the rearward optical surfaces is connected via each of the second light-incident surfaces The second side edge of the surface is connected to each of the second light-incident surfaces; and a light guide portion having a plurality of light guide part branches, the light guide part branches extend along different extension directions, and each of the light guide parts The partial branches respectively have a main light-emitting surface, and the first light-incident surface and the second light-incident surfaces respectively face the main light-emitting surfaces of the light-guiding partial branches. The optical lens described in claim 1 has a top surface, a bottom surface and a plurality of side surfaces, wherein the top surface is opposite to the bottom surface, and the top surface passes through the side surfaces and the bottom surface Are connected, and the top surface has a plurality of top surface branches, the bottom surface has a plurality of bottom surface branches, the bottom surface branches are respectively corresponding to the top surface branches, and one of the surface of the light guide part branch is It is formed by one of the top surface branch and the bottom surface branch and part of the side surfaces corresponding to each other. The optical lens described in item 2 of the scope of patent application, wherein the contours of the orthographic projection of the top surface and the bottom surface on a reference plane are similar to each other, and the area of the contour of the orthographic projection of the top surface on the reference plane Smaller than the area of the contour of the orthographic projection of the bottom surface on the reference plane. The optical lens described in item 2 of the scope of patent application, wherein the top surface and the bottom surface both have a T-shaped profile. The optical lens according to item 2 of the scope of patent application, wherein the side surfaces facing the first light-incident surface or each of the second light-incident surfaces are the main light-emitting surfaces of the light guide portions, and each of the The main light emitting surface of the light guide part is trapezoidal. The optical lens described in item 2 of the scope of patent application, wherein the bottom surface is connected with the rearward optical surfaces, the first light incident surface and the second light incident surfaces to form an accommodating space. The optical lens described in item 2 of the scope of patent application, wherein the rearward optical surfaces are perpendicular to the bottom surface. According to the optical lens described in item 2 of the scope of patent application, there is a first included angle between the first light incident surface and the bottom surface, and the first included angle is between 90° and 160°. The optical lens described in item 2 of the scope of patent application, wherein each of the side surfaces and the bottom surface has a second included angle, and the second included angle is between 20° and 90°. A light source module includes at least one light-emitting unit, and each light-emitting unit includes: an optical lens as described in any one of items 1 to 9 in the scope of the patent application; and a light-emitting element suitable for providing a Light beam, wherein the light beam enters the optical lens through the first light entrance surface and the second light entrance surfaces of the optical lens, and the light beam leaves the optical lens from the main light exit surfaces branched from the light guide parts. According to the light source module of claim 10, the number of the at least one light-emitting unit is multiple, and the light-emitting units are arranged in a staggered manner to form an array.

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