TWI416046B - Light distribution structure for led light source - Google Patents

Abstract

A light distribution structure for a LED light source includes a lens, a light distribution member and a reflection member. The lens is fixed to the light distribution member. The reflection member is fixed to the lens and positioned between the lens and the light distribution member. The reflection member is formed with a protrusion on a side opposite to the lens. The light distribution member defines a through hole for receiving the LED light source. The light distribution member is formed with a plurality of donut shaped reflection portions on a side face to the lens. The reflection portions are oblique relative to the light distribution member bottom. The protrusion is configured for totally reflecting the incident light thereon into the lens.

Description

LED light source light distribution device

The invention relates to a light distribution device, in particular to an LED light source light distribution device.

Compared with traditional light sources, LED light sources have the advantages of low energy consumption, high luminous efficiency, long life, and environmental protection. They have been widely used in lighting fixtures such as roads, tunnels, and landscapes. The smaller light-emitting point of the LED light source and the more concentrated light intensity make the illumination range smaller. Therefore, the existing LED lamp is equipped with a lens in front of the LED light source, and the light is distributed through the lens to astigmatize the light, expand the illumination range, and increase the uniformity of the light. However, the LED light source has a narrow illumination angle, and the light distribution through the lens can only expand the illumination range in a small range, and the illumination is not uniform enough.

In view of this, the present invention provides an LED light source light distribution device to solve the above problems.

An LED light source light distribution device includes a lens, and further includes a light emitting member and a reflecting member. The lens is fixed on the light emitting member, the reflecting member is fixed on the lens and located between the lens and the light emitting member, and the reflecting member faces away from the end surface of the lens. There is a protrusion, the light-emitting member is formed with a through hole for accommodating the LED light source, and the end surface of the light-emitting member facing the lens is recessed to form a plurality of annular reflection portions inclined with respect to the bottom surface of the light-emitting member, the protrusions for ordering from the LED light source The light of the incident angle is reflected to the reflecting portion for totally reflecting the light incident to the reflecting portion onto the lens.

The LED light source light distribution device reflects the light from the LED light source through the protrusion and the reflection portion, and expands the emission angle of the light to make the illumination more uniform.

Referring to FIG. 1 and FIG. 2 simultaneously, the light distribution device 10 includes a light-emitting member 20, a reflection member 30, and a lens 40. The lens 40 is fixed to the light-emitting member 20, and the reflector 30 is located between the lens 40 and the light-emitting member 20.

The light-emitting member 20 has a flat cylindrical body, and a through hole 22 is formed at the center thereof. Referring to FIG. 3 at the same time, the light-emitting member 20 is fixed on the circuit board 60 on which the LED light source 50 is mounted, and can be fixed by means of bonding, screwing, snapping or the like. The LED light source 50 is received at the through hole 22. The light-emitting member 20 is recessed toward the end surface of the lens 40 to form a plurality of annular and inclined reflecting portions 24. The reflecting portion 24 has a substantially V-shaped cross section, and the plurality of reflecting portions 24 have different inclinations with respect to the bottom surface of the light-emitting member 20 for The light incident on the reflection portion 24 is uniformly totally reflected onto the lens 40.

The lens 40 has a disk shape, and its edge is fixed to the edge of the light-emitting member 20, and can be fixed by adhesion, screw, snap, or the like.

The reflecting member 30 is fixed to the inner surface of the lens 40, and a tapered protrusion 32 is formed at a center thereof facing away from the end surface of the lens 40 for reflecting light from the LED light source 50 at a predetermined incident angle to the reflecting portion 24.

Referring to FIG. 3, light incident from the LED light source 50 at a predetermined angle is projected onto the protrusion 32 and reflected by the protrusion 32 onto the reflection portion 24, which is totally reflected by the reflection portion 24 onto the lens 40. After the projection 32 and the reflection portion 24 are twice reflected, the incident angle of the light incident on the lens 40 is enlarged, and the uniformity of the light is further increased due to the difference in inclination of the plurality of reflection portions 24. The light is again scattered by the lens 40 and then emitted to achieve a wide range of uniform illumination effects.

10‧‧‧Lighting device

20‧‧‧Lighting parts

30‧‧‧Reflecting parts

40‧‧‧ lens

22‧‧‧through hole

50‧‧‧LED light source

60‧‧‧ boards

24‧‧‧Reflection Department

32‧‧‧ bumps

1 is an exploded view of a light distribution device according to an embodiment of the present invention.

2 is a schematic cross-sectional view of the light distribution device of FIG. 1.

Fig. 3 is a schematic view showing the optical path of the light distribution device of Fig. 2 for distributing light from an LED light source.

10‧‧‧Lighting device

20‧‧‧Lighting parts

40‧‧‧ lens

22‧‧‧through hole

50‧‧‧LED light source

60‧‧‧ boards

24‧‧‧Reflection Department

32‧‧‧ bumps

Claims (5)

An LED light source light distribution device, comprising a lens, further comprising: a light-emitting member and a reflector; the lens is fixed on the light-emitting member, the reflector is fixed on the lens and located between the lens and the light-emitting member, and the reflector is facing away from The end surface of the lens is formed with a protrusion, and the light-emitting member is formed with a through hole for accommodating the LED light source, and the end surface of the light-emitting member facing the lens is recessed to form a plurality of reflecting portions which are inclined and inclined with respect to the bottom surface of the light-emitting member, the protrusions for coming from The LED light source reflects light at a predetermined incident angle to the reflecting portion for totally reflecting the light incident to the reflecting portion onto the lens. The LED light source light distribution device according to claim 1, wherein the reflecting portion has a V-shaped cross section. The LED light source light distribution device according to claim 1, wherein the plurality of reflection portions have different inclinations. The LED light source light distribution device according to claim 1, wherein the protrusion has a tapered shape. The LED light source light distribution device according to claim 1, wherein the lens has a disk shape, and an edge of the lens is fixed to an edge of the light emitting member by a screw.