CN104565879A - LED light source module - Google Patents

Abstract

A light-emitting diode light source module, comprising a substrate, a light-emitting diode light source arranged on the substrate, an optical element arranged in the forward light emitting direction of the light-emitting diode light source, and a diffusion plate arranged above the optical element. The upper surface is a reflective surface for reflecting light, the optical element is provided with a light hole corresponding to the light emitting diode light source, and the diffuser is provided with a reflector facing the light hole at the light hole of the optical element, and The reflector has a reflective surface facing the light hole. When the light emitted by the light emitting diode light source hits the reflective surface of the reflector, it is reflected to the upper surface of the substrate, and then reflected by the upper surface of the substrate to diffuse plate.

Description

LED light source module

technical field

The invention relates to a light source module, in particular to a light emitting diode light source module.

Background technique

Compared with the traditional light source, light emitting diode (Light Emitting Diode, LED) has the advantages of light weight, small size, low pollution, long life, etc. As a new type of light source, it has been more and more applied to in various fields. Since the light field distribution of the LED is Lambertian distribution, that is, the light intensity directly above it is the strongest, and the light intensity around it decreases successively. Therefore, it is often necessary to add an optical lens to make the light emitted by the LED more divergent and uniform. However, after the setting of the optical lens causes the light intensity emitted by the LED to diverge to a certain extent, the light intensity directly above the LED is still greater than the light intensity in the surrounding area, so that the luminance of the LED light source is not uniform.

Contents of the invention

In view of this, the present invention aims to provide an LED light source module with uniform luminance.

A light-emitting diode light source module, comprising a substrate, a light-emitting diode light source arranged on the substrate, an optical element arranged in the forward light emitting direction of the light-emitting diode light source, and a diffusion plate arranged above the optical element. The upper surface is a reflective surface for reflecting light, the optical element is provided with a light hole corresponding to the light emitting diode light source, and the diffuser is provided with a reflector facing the light hole at the light hole of the optical element, and The reflector has a reflective surface facing the light hole. When the light emitted by the light emitting diode light source hits the reflective surface of the reflector, it is reflected to the upper surface of the substrate, and then reflected by the upper surface of the substrate to diffuse plate.

Due to the reflective surface of the substrate and the arrangement of the reflective surface on the diffusion plate, the light intensity directly above the LED light source is weakened, and the light intensity of the surrounding area is increased, thereby balancing the light intensity of each area of the LED light source module , so that the light emitting brightness of the LED light source module is more uniform.

Description of drawings

FIG. 1 is a schematic cross-sectional view of an LED light source module provided by an embodiment of the present invention.

Description of main component symbols

The following specific embodiments will further illustrate the present invention in conjunction with the above-mentioned drawings.

Detailed ways

Please refer to FIG. 1 , which is a schematic structural diagram of an LED light source module 1 according to an embodiment of the present invention. The LED light source module 1 includes a substrate 10, an LED light source 20 disposed on the substrate 10, an optical element 30 disposed on the forward light output path of the LED light source 20, and a diffusion plate 40 disposed above the optical element 30 .

The substrate 10 is in the shape of a thin plate and has an upper surface 11 . The upper surface 11 is provided with a reflective material or directly is a metal surface with better reflective properties, so that light incident thereon is reflected to the upper part of the substrate 10 . In this embodiment, the upper surface 11 can be a smooth plane or a rough non-planar surface.

The LED light source 20 is disposed on the upper surface 11 of the substrate 10 and is electrically connected to the substrate 10 . The LED light source 20 is a LED packaging structure.

The optical element 30 is disposed directly above the LED light source 20 and spaced apart from the LED light source 20 . The optical element 30 has a top surface 31 and a bottom surface 32 opposite to each other, and a side surface 33 connecting the top surface 31 and the bottom surface 32 . The top surface 31 faces the diffusion plate 40 , and the bottom surface 32 faces the LED light source 20 . The optical element 30 is provided with a light through hole 34 , and the light through hole 34 passes through the middle of the top surface 31 and the bottom surface 32 of the optical element 30 . In this embodiment, the top surface 31 is an optically curved surface, the bottom surface 32 is a plane, and the side surface 33 is perpendicular to the bottom surface 32 . The light through hole 34 corresponds to the light emitting surface of the LED light source 20 , and the size of the light through hole 34 is larger than that of the light emitting surface of the LED light source 20 .

The diffuser 40 is in the shape of a thin plate, which can emit the light incident on it more uniformly. The diffuser plate 40 has a light incident surface 41 and a light output surface 42 opposite to each other. A reflector 43 protruding toward the light hole 34 is disposed on the light incident surface 41 facing the light hole 34 of the optical element 30 . In this embodiment, the size of the reflector 43 along the radial direction of the light hole 34 is larger than the inner diameter of the light hole 34 . The cross section of the reflector 43 is triangular, the reflector 43 has a first reflective surface 431 on the left side and a second reflective surface 432 on the right side, and the first reflective surface 431 and the second reflective surface 432 face the optical element 30 The light hole 34. The first reflective surface 431 and the second reflective surface 432 are provided with reflective materials or are directly metal surfaces with better reflective properties, so that the light incident on the first reflective surface 431 is reflected to the LED light source 20 , the light incident on the second reflective surface 432 is reflected to the right side of the LED light source 20 . In other embodiments, the first reflective surface 431 and the second reflective surface 432 may also be arc surfaces or other curved surfaces.

When the light emitting diode light source 20 emits light, a part of light is emitted from the light through hole 34 of the optical element 30 to the first reflective surface 431 or the second reflective surface 432 of the diffuser plate 40, and then is reflected to the upper surface 11 of the substrate 10. The surface 11 has the property of reflecting light, so this part of the light is reflected to the light incident surface 41 of the diffusion plate 40 again, and finally to the light exit surface 42 to exit to the outside. Another part of the light is transmitted from the light hole 34 of the optical element 30 to the inside of the optical element 30 , and then refracted out of the optical element 30 , and incident on the light incident surface 41 of the diffuser plate 40 and finally exits from the light exit surface 42 to the outside.

In this way, the light intensity directly above the LED light source 20 is weakened, and the light intensity of the surrounding area is increased, thereby balancing the light intensity of each area of the LED light source module 1 and making the light output brightness of the LED light source module 1 more uniform.

The technical content and technical features of the present invention have been disclosed above, but those skilled in the art may still make various substitutions and modifications based on the teaching and disclosure of the present invention without departing from the spirit of the present invention. Therefore, the protection scope of the present invention should not be limited to the contents disclosed in the embodiments, but should include various replacements and modifications that do not depart from the present invention, and should be covered by the appended claims.

Claims (7)

1. a LED light source module, comprise substrate, be arranged at the LED source on this substrate, the diffuser plate being arranged at the optical element on the forward light direction of this LED source and being arranged at above this optical element, it is characterized in that: the upper surface of this substrate is the reflecting surface of reflection ray, this optical element is provided with to should the light hole of LED source, this diffuser plate is just provided with towards the reflector of this light hole to the light hole place of this optical element, and this reflector has just to the reflecting surface of this light hole, the upper surface of this substrate is reflected onto time on the beam projecting that LED source sends to the reflecting surface of this reflector, diffuser plate is reflexed to again by the upper surface of this substrate.

2. LED light source module as claimed in claim 1, is characterized in that: the size of this light hole is large compared with the size of this LED source.

3. LED light source module as claimed in claim 1, is characterized in that: the size of the reflecting surface of this reflector is large compared with the internal diameter of this light hole.

4. LED light source module as claimed in claim 1, is characterized in that: the longitudinal cross-section of this reflector is triangle, and the reflecting surface on this reflector includes the first reflecting surface and the second reflecting surface.

5. LED light source module as claimed in claim 4, is characterized in that: this first reflecting surface and the second reflecting surface are plane.

6. LED light source module as claimed in claim 4, is characterized in that: this first reflecting surface and the second reflecting surface are curved surface.

7. LED light source module as claimed in claim 1, it is characterized in that: this optical element has a relative end face and a bottom surface, this end face is towards this diffuser plate, and this bottom surface is just to this LED source, and this light hole runs through the end face of this optical element and the middle part of bottom surface.