TWI575189B - Lens structure and light-emitting module using the same - Google Patents

Description

Lens structure and light-emitting module using the same

The present invention relates to a lens and a lighting module using the same, and more particularly to a lens structure and a lighting module that can be zoomed using the lens structure.

With the rising awareness of global environmental protection, energy-saving and electronic products have become the trend today. Taking the lighting industry as an example, the luminous efficiency and life of the Light Emitting Diode (LED) are improved, and the characteristics of low energy consumption, low pollution, high efficiency, high reaction speed, small size and light weight are combined. Advantages, so gradually occupy a place in the market.

In general, the process of the LED package structure requires two optical designs to meet the needs of commercial applications. Specifically, in the packaging process, the current light-emitting diode needs to be optically designed to optimize the light-emitting diode, the light flux, the light intensity distribution, and the color temperature distribution range. Then, by adding an optical lens, a diffusion plate or the like to the light-emitting path of the light-emitting diode package structure The optical component is used for secondary optical design to alter the optical properties of the LED package structure (eg, changing the exit angle and increasing color uniformity). In other words, the purpose of the primary optical design is to maximize the light extraction efficiency of the LED package structure, and the secondary optical design aims to make the light emitted by the entire lamp system meet the needs of the design end. However, the central portion and the edge of the light-emitting module may cause uneven illuminance due to poor design.

The present invention provides a lens structure that can be used to increase the light extraction efficiency of light.

The invention provides a light-emitting module which has good light type and light color uniformity and high light-emitting efficiency.

The lens structure of the present invention includes a body, a first light guiding structure, and a second light guiding structure. The body has a light incident surface, wherein the light incident surface is a plane. The first light guiding structure is coupled to the body. The second light guiding structure is respectively connected to the body and the first light guiding structure, wherein the second light guiding structure surrounds the first light guiding structure, and the first light guiding structure and the second light guiding structure define a light emitting surface with respect to the light incident surface .

In an embodiment of the invention, the light exiting surface includes a light exiting surface on the first light guiding structure.

In an embodiment of the invention, the light exiting surface comprises a light exiting plane and a light exiting ramp on the second light guiding structure. The light exiting slopes are respectively connected to the light curved surface and the light exiting plane, and the light exiting plane is parallel to the light incident surface.

In an embodiment of the invention, the second light guiding structure is parallel to The cross-section width on any section of the entrance surface is equal.

In an embodiment of the invention, the second light guiding structure has a cross-sectional width on any section close to the body and parallel to the light incident surface, and is larger than any of the second light guiding structure away from the body and parallel to the light incident surface. The width of the section on a section.

The light emitting module of the present invention comprises a reflective cup, a light emitting element and a lens structure. The reflector cup has a bottom and an opening opposite the bottom. The illuminating element is disposed on the bottom and is adapted to emit light. The lens structure is disposed at the opening and is located on the light emitting element and has a distance from the light emitting element. The lens structure includes a body, a first light guiding structure, and a second light guiding structure. The body has a light incident surface, wherein the light incident surface is a plane. The first light guiding structure is coupled to the body. The second light guiding structure is respectively connected to the body and the first light guiding structure, wherein the second light guiding structure surrounds the first light guiding structure, and the first light guiding structure and the second light guiding structure define the light output relative to the light incident surface surface. The light enters the body from the light surface and is emitted from the light surface after passing through the first light guiding structure or the second light guiding structure.

In an embodiment of the invention, the lens structure described above is movable relative to the light emitting element to change the distance between the lens structure and the light emitting element.

In an embodiment of the invention, the sidewall surface of the body and the sidewall of the second light guiding structure have an external thread, and the inner wall of the reflector cup has an internal thread matched with the external thread, and the external thread and the internal thread The lens structure is movable relative to the light emitting element.

In an embodiment of the invention, the light emitted from the light exit surface through the body and the first light guiding structure is perpendicular to the light incident surface.

In an embodiment of the invention, the body, the first light guiding structure and the second light guiding structure are integrally formed.

Based on the above, the light-emitting module of the present invention is provided with a lens structure on the reflective cup for controlling the light type and the light color uniformity of the light emitted by the light-emitting element, so as to avoid illuminance at the center and the edge of the light-emitting module. Uneven spot phenomenon while maintaining high light output efficiency. In addition, moving the lens structure relative to the light-emitting element to adjust the distance between the light-emitting element and the light-incident surface allows the focal length of the light-emitting module to be changed, thereby achieving the desired light-type effect.

The above described features and advantages of the invention will be apparent from the following description.

100‧‧‧Lighting module

110‧‧‧Reflection Cup

110s‧‧‧ inner wall

111‧‧‧ bottom

112‧‧‧ openings

120‧‧‧Lighting elements

130, 130a, 130b‧‧‧ lens structure

131, 131a, 131b‧‧‧ ontology

131s, 134s‧‧‧ side wall

132, 132a, 132b‧‧‧ into the glossy surface

133, 133a, 133b‧‧‧ first light guiding structure

134, 134a, 134b‧‧‧ second light guiding structure

135‧‧‧Glossy

135a‧‧‧Light surface

135b‧‧‧ light plane

135c, 135c1‧‧‧ light slant

D1‧‧‧First distance

D2‧‧‧Second distance

L‧‧‧Light

W, W1, W2‧‧‧ section width

1 is a schematic diagram of a light emitting module according to an embodiment of the present invention.

2 is a schematic view of the lens module of FIG. 1 after the lens structure and the light-emitting element are relatively moved.

3 is a schematic view of a lens structure according to still another embodiment of the present invention.

4 is a schematic view of a lens structure according to another embodiment of the present invention.

1 is a schematic diagram of a light emitting module according to an embodiment of the present invention. 2 is a schematic view of the lens module of FIG. 1 after the lens structure and the light-emitting element are relatively moved. Please refer to 1 and 2, in this embodiment, the light emitting module 100 includes a reflective cup 110, a light emitting element 120, and a lens structure 130. The reflective cup 110 is generally made of a material having a reflectance greater than 90%, such as a metal material. . Preferably, it is composed of silver (Au) or aluminum (Al). The reflector cup 110 has a bottom portion 111 and an opening 112 opposite to the bottom portion 111. The light-emitting element 120 is, for example, a light-emitting diode or a laser diode or other light-emitting element suitable for emitting monochromatic light, and is disposed on the bottom portion 111.

The lens structure 130 is disposed in the opening 112 and is opposite to the light emitting element 120 and covers the light emitting element 120. Here, the lens structure 130 includes a body 131, a first light guiding structure 133, and a second light guiding structure 134, and the body 131, the first light guiding structure 133, and the second light guiding structure 134 may be integrally formed. In general, the lens structure 130 may be made of glass, silicone, acryl or other materials having a light transmittance greater than 50%.

On the other hand, the body 131 has a light incident surface 132, wherein the light incident surface 132 is a flat surface, and the light emitting element 130 and the light incident surface 132 have a first distance D1 as shown in FIG. In the present embodiment, the lens structure 130 is movable relative to the light emitting element 120 to modulate the distance between the light emitting element 130 and the light incident surface 132. For example, the sidewall surface 131s of the body 131 and the sidewall surface 134s of the second light guiding structure 134 may be provided with external threads (not shown), and the inner wall surface 110s of the reflector cup 110 may be provided with internal threads (not shown). The external thread (not shown) on the sidewall surface 131s of the body 131 and the sidewall surface 134s of the second light guiding structure 134 can cooperate with internal threads (not shown) on the inner wall surface 110s of the reflector cup 110, so that the lens Structure 130 is movable relative to light emitting element 120.

As shown in FIG. 2, after the lens structure 130 is moved relative to the light emitting element 120, the light emitting element 130 and the light incident surface 132 may have a second distance D2, wherein the second distance D2 is, for example, greater than the first distance D1. At this time, the first light guiding structure 133 and the second light guiding structure 134 may protrude outside the opening 112, and only the side wall surface 131s of the body 131 may abut the inner wall surface 110s of the reflective cup 110. In other words, moving the lens structure 130 relative to the light-emitting element 120 to adjust the distance between the light-emitting element 120 and the light-incident surface 132 allows the distance between the light-emitting elements 120 of the light-emitting module 100 and the focal length of the lens structure 130 to change. To achieve the desired light type effect.

Although the present embodiment is provided with a thread (not shown) for the side wall surface 131s of the main body 131 and the side wall surface 134s of the second light guiding structure 134, the present invention is not limited thereto. In other possible embodiments, the lens structure 130 and the reflective cup 110 can also be designed to pass through other mechanical components, such as tracks or cassettes, to move the lens structure 130 relative to the light emitting element 120. More specifically, for example, the lens structure 130 is clamped through a cylindrical body (not shown), so that the lens structure 130 can be driven by the movement of the cylinder (not shown) to modulate the light-emitting element 130 and the light-incident surface. The distance between 132 is not limited as long as the design of the distance between the light-emitting element 130 and the lens structure 130 can be changed.

With reference to FIG. 1 and FIG. 2 , the first light guiding structure 133 is connected to the body 131 , and the second light guiding structure 134 is respectively connected to the body 131 and the first light guiding structure 133 , wherein the second light guiding structure 134 surrounds the first light guiding structure. 131, and the first light guiding structure 133 and the second light guiding structure 134 define a light emitting surface 135 with respect to the light incident surface 132. In detail, the light-emitting surface 135 includes a light-emitting surface 135a on the first light guiding structure 133. The light exiting plane 135b and the light exiting slope 135c are respectively disposed on the second light guiding structure 134, wherein the light exiting slope 135c is respectively connected to the light curved surface 135a and the light exiting plane 135b, and the light exiting plane 135b is substantially parallel to the light incident surface 132. On the other hand, the second light guiding structure 134 has the same section width W on any section parallel to the light incident surface 132.

In this embodiment, the body 131, the first light guiding structure 133 and the second light guiding structure 134 are located between the opening 112 and the bottom 111, for example, wherein the light emitting plane 135b is substantially in line with the opening 112 and lies in the same plane. The light emitting element 120 is opposite to the light incident surface 132. Therefore, the light L emitted from the light-emitting element 120 is incident on the body 131 from the light-incident surface 132. A part of the light L is emitted from the light-emitting surface 135a after passing through the first light-guiding structure 133, and the other portion of the light is emitted. L will be emitted from the light exiting plane 135b or the light exiting ramp 135c after passing through the second light guiding structure 134.

It should be noted that, in the embodiment not shown, after the light L emitted from the light-emitting element 120 enters the body 131 from the light-incident surface 132, a part of the light L is also passed through the first light-guiding structure 133. Then, it is emitted from the side wall surface 134s of the second light guiding structure 134.

In detail, the light L emitted from the light-emitting surface 135a through the main body 131 and the first light guiding structure 133 is perpendicular to the light-incident surface 132, so that the light type L is more concentrated from the lens structure 130. It has the effect of collecting light. On the other hand, the light L emitted from the light exiting plane 135b or the light exiting slope 135c through the body 131 and the second light guiding structure 134 in sequence will be scattered, so that the light L emitted from the lens structure 130 has a more uniform light pattern. And light color. In this way, it is possible to avoid the occurrence of uneven illuminance in the center and the edge of the light-emitting module 100, and At the same time, it maintains high light efficiency and meets the demand for high lighting quality.

Other embodiments are listed below for illustration. It is to be noted that the following embodiments use the same reference numerals and parts of the above-mentioned embodiments, and the same reference numerals are used to refer to the same or similar elements, and the description of the same technical content is omitted. For the description of the omitted portions, reference may be made to the foregoing embodiments, and the following embodiments are not repeated.

Figure 3 is a schematic illustration of a lens structure in accordance with another embodiment of the present invention. Referring to FIG. 3, the lens structure 130a is substantially similar to the lens structure 130, except that the main difference between the two is that in the present embodiment, the second light guiding structure 134a is adjacent to the body 131a and parallel to the light incident surface 132a. The section width W1 in the cross section is greater than the section width W2 of the second light guiding structure 134a on any section away from the body 131a and parallel to the light incident surface 132a. For example, the light emitting module 100 can also adopt the lens structure 130a, wherein the light L emitted from the first light guiding structure 133a of the lens structure 130a can have the effect of collecting light, and the light emitted from the second light guiding structure 134a. L will be scattered to have a uniform light pattern and light color to avoid uneven illuminance at the center and edge of the light-emitting module 100, and at the same time maintain high light-emitting efficiency and achieve high illumination quality.

4 is a schematic view of a lens structure according to another embodiment of the present invention. Referring to FIG. 4, the lens structure 130b is substantially similar to the lens structure 130a, but the main difference is that in the present embodiment, the second light guiding structure 134b is substantially triangular in cross section perpendicular to the light incident surface 132b. That is, the second light guiding structure 134b may have two light-emitting inclined surfaces 135c1 connected thereto, and one light-emitting inclined surface 135c1 is connected to the first The light guiding structure 131b and the other light exiting slope 135c1 are connected to the body 131b. For example, the light emitting module 100 can also adopt the lens structure 130b, wherein the light L emitted from the first light guiding structure 133b of the lens structure 130b can have the effect of collecting light, and the light emitted from the second light guiding structure 134b. L will be scattered to have a uniform light pattern and light color to avoid uneven illuminance at the center and edge of the light-emitting module 100, and at the same time maintain high light-emitting efficiency and achieve high illumination quality.

In summary, the light emitting module of the present invention is provided with a lens structure on the reflective cup, wherein the lens structure comprises a first light guiding structure and a second light guiding structure, which can be used to control the light type and light of the light emitted by the light emitting element. Color uniformity, wherein the light emitted from the first light guiding structure may have the effect of collecting light, and the light emitted from the second light guiding structure will be scattered to have uniform illuminance and light chromaticity to avoid illuminating The center and the edge of the module produce uneven spot illuminance, and at the same time maintain high light output efficiency and achieve high illumination quality. In addition, moving the lens structure relative to the light-emitting element to adjust the distance between the light-emitting element and the light-incident surface allows the focal length of the light-emitting module to be changed, thereby achieving the desired light-type effect.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention, and any one of ordinary skill in the art can make some changes and refinements without departing from the spirit and scope of the present invention. The scope of the invention is defined by the scope of the appended claims.

100‧‧‧Lighting module

110‧‧‧Reflection Cup

110s‧‧‧ inner wall

111‧‧‧ bottom

112‧‧‧ openings

120‧‧‧Lighting elements

130‧‧‧Lens structure

131‧‧‧Ontology

131s, 134s‧‧‧ side wall

132‧‧‧Into the glossy surface

133‧‧‧First light guiding structure

134‧‧‧Second light guiding structure

135‧‧‧Glossy

135a‧‧‧Light surface

135b‧‧‧ light plane

135c‧‧‧lighting bevel

D1‧‧‧First distance

L‧‧‧Light

W‧‧‧ section width

Claims (14)

A lens structure includes: a body having a light incident surface, wherein the light incident surface is a tangential plane; a first light guiding structure connecting the body; and a second light guiding structure respectively connecting the body and the The first light guiding structure surrounds the first light guiding structure, and the first light guiding structure and the second light guiding structure define a light emitting surface with respect to the light incident surface. The lens structure of claim 1, wherein the light exiting surface comprises a light exiting surface on the first light guiding structure. The lens structure of claim 2, wherein the light exiting surface comprises a light exiting plane and a light exiting slope on the second light guiding structure, wherein the light exiting slope is respectively connected to the light exiting curved surface and the light exiting plane, and The light exiting plane is parallel to the light incident surface. The lens structure of claim 1, wherein the second light guiding structure has an equal cross-sectional width on any section parallel to the light incident surface. The lens structure of claim 1, wherein a cross-sectional width of the second light guiding structure on any section adjacent to the body and parallel to the light incident surface is greater than the second light guiding structure is away from the body And parallel to the cross-sectional width of any section of the light incident surface. A lighting module includes: a reflecting cup having a bottom and an opening opposite to the bottom; a light emitting element disposed on the bottom and adapted to emit a light; a lens structure, at least partially disposed in the opening, and opposite to the light-emitting element and having a distance from the light-emitting element, the lens structure comprising: a body having a light-incident surface, wherein the light-incident surface is aligned a first light guiding structure connecting the body; and a second light guiding structure respectively connecting the body and the first light guiding structure, wherein the second light guiding structure surrounds the first light guiding structure, and the The first light guiding structure and the second light guiding structure define a light emitting surface opposite to the light incident surface, wherein the light enters the body from the light incident surface, and passes through the first light guiding structure or the The second light guiding structure is then emitted from the light exiting surface. The light emitting module of claim 6, wherein the light emitting surface comprises a light emitting surface on the first light guiding structure. The light-emitting module of claim 7, wherein the light-emitting surface comprises a light-emitting plane and a light-emitting slope on the second light-guiding structure, and the light-emitting slope is respectively connected to the light-emitting surface and the light-emitting plane, and The light exiting plane is parallel to the light incident surface. The illuminating module of claim 6, wherein the second light guiding structure has the same cross-sectional width on any section parallel to the light incident surface. The illuminating module of claim 6, wherein the second light guiding structure has a section width closer to the body and parallel to the light incident surface than the second light guiding structure is away from the body And parallel to the cross-sectional width of the other section of the light incident surface. The lighting module of claim 6, wherein the lens junction The structure is movable relative to the light emitting element to vary the distance between the lens structure and the light emitting element. The illuminating module of claim 11, wherein the side wall surface of the body and the side wall surface of the second light guiding structure have an external thread, and the inner wall surface of the reflecting cup has a fit with the external thread. a thread through which the lens structure is movable relative to the light-emitting element. The light-emitting module of claim 6, wherein the light emitted from the light-emitting surface through the body and the first light-guiding structure is perpendicular to the light-incident surface. The light emitting module of claim 6, wherein the body, the first light guiding structure and the second light guiding structure are integrally formed.