TWI410588B - Light source module - Google Patents

Abstract

A light source module includes a number of light sources, a reflecting member and a collimating lens. The reflecting member has a circular ring reflecting surface and a top surface connected to the reflecting surface. A number of light sources are arranged around the reflecting surface. The reflecting surface is used for reflecting the light emitted from the light sources to the collimation lens. The collimating lens is positioned on the top surface and is used for collimated emitting the light reflected by the reflecting surface.

Description

Light source module

The present invention relates to the field of optical technologies, and in particular, to a light source module capable of emitting collimated light.

At present, Light Emitting Diode (LED) has been widely used in many fields due to its low power consumption, long life, small size and high brightness. Here, a novel light-emitting diode can be found in Illumination With Solid State Lighting Technology by Daniel A. Steigerwald et al., IEEE Journal on Selected Topics in Quantum Electronics, Vol. 8, No. 2, March/April 2002. .

The light emitting diode can be applied to a light source module such as a street light. The light-emitting diode has a large light-emitting angle, and the light intensity in the center is strong, and the surrounding light intensity is weak, resulting in uneven light emission of the entire light source module, and the light emitted by the light source is not collimated and dispersed, and the brightness of the light source is restricted. .

In view of this, it is necessary to provide a light source module capable of light collimation.

In the following, an embodiment of a light source collimating light source module will be described to improve the brightness of the light source module.

A light source module includes a plurality of light sources, a reflective element and a collimating lens, the reflective element having a circular reflecting surface and a top surface adjacent to the reflecting surface, the plurality of light sources being disposed around the reflecting surface, the reflecting surface being used for The light beam emitted by the plurality of light sources is reflected to the collimating lens, and the light incident side of the collimating lens is disposed on the top surface and is in contact with the top surface for collimating the light beam reflected by the reflecting surface into the collimating lens.

The light source module in the technical solution can enable the light emitted from the plurality of circularly arranged light sources to pass through the reflecting surface and the collimating lens, so that the light is emitted through the light emitting surface of the collimating lens, and the emitted light is parallel to the collimation. The central axis of the lens. Therefore, the light source module can increase the brightness of the light source, and the emitted light is collimated in parallel.

100,200‧‧‧Light source module

110‧‧‧ lamp holder

111, 212‧‧‧ Support

1111‧‧‧ first surface

1112‧‧‧ side wall

112, 211‧‧‧ Installation Department

1121‧‧‧ inner surface

1122‧‧‧ outer surface

1123‧‧‧ Plane

120, 220‧‧‧ light source

121‧‧‧Glossy

130, 230‧‧‧reflecting elements

131‧‧‧ bottom

132‧‧‧ top surface

133, 233‧‧ ‧ reflective surface

140, 240‧‧ ‧ collimating lens

141‧‧‧light side

1411‧‧‧Contact surface

1412‧‧‧ first light surface

1413‧‧‧Second entrance

142‧‧‧Lighting side

1420‧‧‧ dent

1421‧‧‧The first glazing

1422‧‧‧Second glazing

143‧‧‧ side

213‧‧‧Support column

FIG. 1 is a perspective view of a light source module according to a first embodiment of the present technical solution.

Figure 2 is a schematic cross-sectional view taken along line II-II of Figure 1.

FIG. 3 is a perspective view of a light source module according to a second embodiment of the present technical solution.

The embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

Referring to FIG. 1 and FIG. 2 , a light source module 100 according to a first embodiment of the present invention includes a socket 110 , a plurality of light sources 120 , a reflective component 130 , and a collimating lens 140 .

The socket 110 is made of metal or alloy, which may be aluminum, copper, silver or other metal having strong thermal conductivity. The socket 110 includes a support portion 111 and a mounting portion 112. The support portion 111 is a cylinder having a first surface 1111 and a side wall 1112, the first table The face 1111 is a circular plane, and the side wall 1112 is an annular surface perpendicular to the first surface 1111. The support portion 111 is for carrying the mounting portion 112 and the reflective member 130.

The mounting portion 112 has an annular shape that extends from the first surface 1111 in a direction away from the first surface 1111. The mounting portion 112 and the support portion 111 are in contact with each other. The mounting portion 112 has an inner surface 1121, an outer surface 1122 opposite the inner surface 1121, and a flat surface 1123 connected between the inner surface 1121 and the outer surface 1122. The sidewall 1112 is flush with the outer surface 1122 and the plane 1123 is parallel to the first surface 1111. In the present embodiment, the mounting portion 112 is integrally formed with the support portion 111. Of course, the support portion 111 and the mounting portion 112 can also be separately assembled and assembled.

The plurality of light sources 120 are arranged in a ring shape. In this embodiment, the plurality of light sources 120 are equally spaced on the inner surface 1121 of the mounting portion 112, and each of the light sources 120 has a light emitting surface 121. Of course, the plurality of light sources 120 can also be annularly arranged around the central axis of the reflective element 130 by other objects. The light exiting surface 121 of each light source 120 is opposite to the reflective surface 133. The light source 120 can be a light emitting diode or other light emitting elements such as a halogen lamp or the like. Preferably, the light exit surface 121 of the complex light source 120 is perpendicular to the first surface 1111 and opposite to the reflective element 130. In this embodiment, since the plurality of light sources 120 are embedded in the mounting portion 112 made of metal, and the mounting portion 112 is integrally formed with the supporting portion 111, the heat generated by the light source 120 can be dissipated by the mounting portion 112 and the supporting portion 111.

The reflective element 130 is generally in the shape of a truncated cone disposed in the center of the plurality of circular light sources 120 arranged in a ring. In this embodiment, the reflective element 130 is disposed coaxially with the mounting portion 112 on the first surface 1111. The reflective element 130 has a bottom surface 131, a top surface 132 opposite the bottom surface 131, and a reflective surface connected between the bottom surface 131 and the top surface 132. 133. The bottom surface 131 and the top surface 132 are circular planes that are parallel to each other. The bottom surface 131 is in close contact with the first surface 1111. The diameter of the bottom surface 131 is larger than the diameter of the top surface 132, the diameter of the reflective element 130 gradually decreases from the bottom surface 131 toward the top surface 132, and the plurality of light sources 120 are disposed around the central axis of the reflective surface 133. The reflecting surface 133 is used for reflecting light incident from the light source 120 to the reflecting surface 133, which is a multi-stage paraboloid such that the light reflected by the reflecting surface 133 is emitted substantially in a direction parallel to the central axis of the reflecting element 130. Preferably, the reflecting surface 133 is a total reflecting surface.

The reflective element 130 can be integrally formed with the socket 110. In this embodiment, the reflective element 130 and the socket 110 are separately formed and then assembled by welding or other means. The reflective member 130 may be made of a metal having high reflection properties such as aluminum, copper, silver, or the like, or may be formed by plating a reflective film from other materials.

The collimating lens 140 is generally cylindrical in shape having a diameter substantially equal to the diameter of the support portion 110, and the collimating lens 140 is disposed coaxially with the reflective member 130. The collimator lens 140 has a light incident side 141, a light exiting side 142 opposite to the light incident side 141, and a side surface 143 connected between the light incident side 141 and the light exiting side 142. The light incident side 141 is in contact with the top surface 132. The collimator lens 140 is made of a material that is transparent and has a low absorption of light, such as polymethyl methacrylate (PMMA), polycarbonate (PC), or polystyrene (PS).

The light incident side 141 includes a contact surface 1411 and a first light incident surface 1412 surrounding the contact surface 1411. The contact surface 1411 is in contact with the top surface 132. The first light incident surface 1412 is an annular plane perpendicular to the central axis of the collimating lens 140, and is coupled to the reflective surface 133. Preferably, in order to make the light of the light source 120 fully utilized, the size of the first light incident surface 1412 should be such that the light having the largest deflection angle away from the first surface 1111 within the range of the light exit angle of each light source 120 can be irradiated to the first light. The light incident surface 1412 is refracted, and the refracted light is deflected toward the central axis of the collimating lens 140.

In this embodiment, the light incident side 141 and the side surface 143 of the collimating lens 140 have a chamfer, and the light incident side 141 further includes a second light incident surface connected between the first light incident surface 1412 and the side surface 143. 1413. The second light incident surface 1413 smoothly transitions between the first light incident surface 1412 and the side surface 143. The second light incident surface 1413 causes the light that is incident on the second light incident surface 1413 to be deflected toward the central axis of the collimating lens 140 by a large angle.

The light exiting side 142 includes a first light emitting surface 1421 and a second light emitting surface 1422. The first light-emitting surface 1421 is a bottom surface of the recess 1420 formed in the middle of the light-emitting side 142. The recess 1420 has a shape similar to that of the convex lens, so that the first light-emitting surface 1421 is approximately a concave curved surface of a concave lens for diverging the concentrated light. In this manner, the concentrated light that is incident on the first light-emitting surface 1421 in the collimating lens 140 is refracted by the first light-emitting surface 1421, and the generated refracted light is emitted substantially in a direction parallel to the central axis of the collimating lens 140. The second light-emitting surface 1422 is adjacent to the first light-emitting surface 1421 , which is a circular plane perpendicular to the central axis of the collimating lens 140 and parallel to the first light-incident surface 1412 .

Preferably, in order to enable the light emitted by the light source 120 to be effectively collimated from the collimating lens 140, in the central axis direction of the collimating lens 140, the first light incident surface 1412 and the second light exit surface 1422 are both opposite to the reflective surface 133. Correspondingly, the first light-emitting surface 1421 corresponds to the contact surface 1411 of the light-incident side 141.

The light emitted by each of the light sources 120 is respectively irradiated to the reflecting surface 133, the first light incident surface 1412 and the second light incident surface 1413, and a portion of the light that is incident on the reflective surface 133 is L1, and is irradiated to the portion of the first light incident surface 1412. The light is L2, and part of the light that is incident on the second light incident surface 1413 is L3. Wherein, since the reflecting surface 133 is a paraboloid, the light L1 irradiated to the reflecting surface 133 is reflected by the reflecting surface 133, and is generated substantially parallel to the collimating lens 140. The reflected light L11 of the central axis, the reflected light L11 is incident substantially perpendicularly to the first light incident surface 1412, and forms an outgoing light L12 emerging from the second light exiting surface 1422 in a direction substantially parallel to the central axis of the collimating lens 140. The light ray L2 irradiated to the first light incident surface 1412 is refracted on the first light incident surface 1412, and the refracted light L21 which is deflected toward the central axis of the collimating lens 140 is generated. The refracted light L21 is again passed through the first light emitting surface 1421. Refraction occurs, that is, the emitted light L22 after divergence is generated. The exiting direction of the outgoing light L22 is also substantially parallel to the central axis of the collimating lens 140. The ray L3 irradiated to the second light incident surface 1413 is substantially similar to the refracting path of the light ray L2, and the light ray L3 is refracted on the second light incident surface 1413 to generate a refraction at a large angle to the center of the collimating lens 140. Light L31. The refracted ray L31 is again refracted through the first illuminating surface 1412, and a divergent outgoing ray L32 is generated. The outgoing direction of the outgoing ray L32 is also substantially parallel to the central axis of the collimating lens 140. Thus, the light rays L1, L2, and L3 emitted by each of the light sources 120 can be emitted substantially in a direction parallel to the central axis of the collimator lens 140.

In the light source module 100 of the present invention, the light emitted from the plurality of circularly arranged light sources 120 can be emitted through the light emitting side 142 of the collimating lens 140 through the reflecting surface 133 and the collimating lens 140, and the emitted light is basically Parallel to the central axis of the collimating lens 140. Therefore, the light source module 100 can increase the light emission brightness of the light source, and the emitted light rays are collimated in parallel.

Referring to FIG. 3 , a structure of a light source module 200 according to a second embodiment of the present invention is similar to the structure of the light source module 100 , and includes a plurality of light sources 220 , a reflective component 230 , and a collimating lens 240 . The support portion 212 includes a plurality of support columns 213, and the plurality of support columns 213 are equally spaced around the central axis of the mounting portion 211. The mounting portion 211 is away from one side of the collimating lens 240. In this embodiment, the heights of the light source 220 and the reflecting surface 233 can be adjusted by changing the height of the support portion 212.

In summary, the present invention has indeed met the requirements of the invention patent, and has filed a patent application according to law. However, the above description is only a preferred embodiment of the present invention, and it is not possible to limit the scope of the patent application of the present invention. Equivalent modifications or variations made by persons skilled in the art in light of the spirit of the invention are intended to be included within the scope of the following claims.

100‧‧‧Light source module

110‧‧‧ lamp holder

120‧‧‧Light source

130‧‧‧reflecting elements

140‧‧‧ collimating lens

142‧‧‧Lighting side

1421‧‧‧The first glazing

1422‧‧‧Second glazing

Claims (10)

A light source module comprising a plurality of light sources, a reflective element and a collimating lens, the reflective element having an annular reflective surface and a top surface adjacent to the reflective surface, the plurality of light sources being disposed around the reflective surface, the reflective surface being used for The light beam emitted by the plurality of light sources is reflected to the collimating lens, and the light incident side of the collimating lens is disposed on the top surface and is in contact with the top surface for collimating the light beam reflected by the reflecting surface into the collimating lens. The light source module of claim 1, wherein the collimating lens includes a light exiting side opposite to the light incident side, the light incident side having a contact surface and a first light incident surrounding the contact surface a light emitting side having a first light emitting surface and a second light emitting surface surrounding the first light emitting surface, wherein the contact surface is for contacting the top surface, the first light incident surface is for an incident light beam, and the first light emitting surface is The second light-emitting surface is opposite to the first light-incident surface, and the first light-emitting surface and the second light-emitting surface are both used to emit light beams. The light source module of claim 2, wherein the contact surface, the first light incident surface, and the second light exit surface are both planar and perpendicular to a central axis of the collimating lens. The light source module of claim 2, wherein the first light emitting surface is a concave curved surface for diverging the concentrated light. The light source module of claim 2, wherein the collimating lens further comprises a side surface connected between the light incident side and the light exiting side, and the collimating lens is formed between the first light incident surface and the side surface Chamfering. The light source module of claim 1, wherein the reflective element further has a bottom surface opposite to the top surface, the reflective surface being coupled between the top surface and the bottom surface, the reflection The cross-section of the element is circular and its diameter gradually decreases from the bottom to the top. The light source module of claim 1, wherein the reflective surface is a paraboloid. The light source module of claim 1, wherein the light source module further comprises a lamp holder, the lamp holder comprises a support portion and a mounting portion, the reflective element is disposed on the support portion, and the plurality of light sources are disposed on the light source module Installation department. The light source module of claim 8, wherein the mounting portion has a circular shape and has an inner surface opposite to the reflecting surface, and the plurality of light sources are equally spaced on the inner surface of the mounting portion. The light source module of claim 1, wherein each of the light sources has a light exiting surface, and each of the light exiting surfaces is opposite to the reflective surface.