CN104654055A - Low glare and high power of LED (Light Emitting Diode) light source module - Google Patents

Abstract

A low-glare high-power LED light source module belongs to the technical field of high-power LED applications. The LED array light source is arranged at the bottom of the lamp holder with heat sink. The front end of the lamp holder is sequentially connected with a total reflection free-form surface compound lens and connected with a microlens array anti-glare sheet. The LED array light source is composed of a corresponding high-power LED chip array. The radiator is a slotted fin structure, which efficiently dissipates the heat generated by the high-power LED chip array. The micro-lens array anti-glare sheet is integrated with multiple micro-lenses, each micro-lens unit is a polygonal plano-convex lens, the convex surface is a compound curved surface, and the aspheric surface and the conical surface are combined, and the luminous flux is realized through each micro-lens array unit Reasonable allocation, eliminate glare, the entire light source module greatly saves the power consumption of the LED light source module, effectively reducing the cost of use, its low power consumption, high brightness, long service life, and can meet the beam angle requirements of 140 to 170 degrees.

Description

A low-glare high-power LED light source module

technical field

The invention belongs to the technical field of high-power LEDs, and in particular relates to a low-glare high-power LED light source module.

Background technique

The application of high-power LEDs in the lighting field requires the integration of multiple chips to meet the needs of the total luminous flux, but the current multi-chip integrated power LED lamps have some obvious defects: poor heat dissipation leads to low luminous efficiency of LEDs, and at the same time affects LEDs. Luminous intensity and service life; After multi-chip integration, the gap between each chip will produce light spots within a certain distance, forming uneven lighting; LEDs in the lighting field are all high-brightness white LEDs, and the light source has high directivity, which is easy to produce glare. The traditional heat sink structure ignores the influence of the actual environment of the LED and the structure of the lamp on the heat dissipation process and characteristics of the LED, and adopts a very complicated heat sink structure, resulting in high cost. The traditional solution to glare and uneven lighting is to use traditional diffusion films , diffusion plate, or frosting and atomization treatment of lamps and lanterns will bring about problems such as poor light efficiency or poor glare elimination. With the wide application of LED light sources in various fields today, a more effective solution has been found. The above problems are particularly important for the future development of LED in the field of lighting.

Contents of the invention

In order to overcome the problems of poor heat dissipation, uneven illumination and glare in the prior art of high-power LED lighting applications, the present invention aims to provide a low-glare high-power LED light source module solution, through a reasonable heat dissipation structure and optical system, Improve the overall light efficiency of the light source module, eliminate glare, and reduce energy consumption.

The low-glare high-power LED light source module is composed of an LED array light source 1, a lamp holder 2, a total reflection compound lens 3, a micro-lens array anti-glare sheet 4 and a heat sink 5, and the LED array light source 1 is co-located on a belt The bottom of the lamp holder 2 of the radiator and the front end of the lamp holder 2 are equipped with a total reflection free-form surface composite lens 3, and the front end of the lamp holder 2 is connected with a microlens array anti-glare sheet in turn, and the LED array light source 1 is composed of a corresponding high-power LED array arrangement .

The low-glare high-power LED light source module is characterized in that the total reflection free-form surface compound lens (3) adjusts the light emitted by the LED array light source (1) to 10-20 degrees.

The low-glare high-power LED light source module is characterized in that the micro-lens array anti-glare sheet (4) is composed of multiple compound curved lens arrays, the shape of the lens is a regular polygon, and the number of regular polygons is 3- 8. The length of each side is 0.05-0.15um.

The low-glare high-power LED light source module is characterized in that the micro-lens array anti-glare sheet (4) is composed of an aspheric surface (a) and a tapered surface (b).

The low-glare high-power LED light source module is characterized in that the micro-lens array anti-glare sheet (4) is composed of an aspheric surface (a ₁ ), a conical surface (b ₁ ), and an aspheric surface (c ₁ ).

The invention adopts the LED array light source, passes through the total reflection free-form surface composite lens, and utilizes the total reflection surface of the total reflection free-form surface composite lens to realize the collection and adjustment of large-angle light rays, adjust the light angle to the range of 10 degrees to 20 degrees, and then Through the micro-lens array anti-glare film, the reasonable distribution of high-power LED luminous intensity can be realized, which can improve the utilization rate of light energy, eliminate glare, greatly save the power consumption of the LED light source module, and effectively reduce the cost of use. Its power consumption is low, High brightness, long service life, can achieve 140-170-degree beam angle requirements.

Description of drawings

Fig. 1 is a schematic diagram of the main structure of the present invention;

Fig. 2 and Fig. 3 are structural schematic diagrams of microlens array anti-glare sheet;

The luminous intensity distribution figure of Fig. 4 embodiment 1;

The luminous intensity distribution figure of Fig. 5 embodiment 2;

In the drawings: 1-LED array light source, 2-lamp holder, 3-total reflection free-form surface compound lens, 4-micro lens array anti-glare sheet, 5-slotted fin radiator, a-aspheric surface, b-cone surface, a1-aspheric surface, b1-conical surface, c1-aspheric surface.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings, and specific implementation methods will be given.

As shown in Figure 1, the main body of the present invention includes an LED array light source (1) and a lamp holder (2). The LED array light source (1) is arranged at the bottom of the lamp holder (2) with a heat sink. The heat generated by the light source 1 is dissipated, so that the working temperature of the entire lamp is within a more suitable range, and the service life of the LED array light source (1) is improved. The front end of the lamp holder (2) is equipped with a total reflection compound lens (3). Since the light emitted by the LED array light source (1) generally emits a wide beam to the front, the central light intensity is stronger and gradually weakens outward. In order to improve the light energy utilization rate, the present invention uses a total reflection compound lens (3) to collect light beams, utilizes the side wall of the lens to perform total reflection on part of the incident light, and then emits through the front surface of the compound lens, adjusting the half-intensity angle of the outgoing light by 5 degrees ~10 degrees range, and finally adopt the microlens array anti-glare sheet (4), through each microlens array unit, the incident light is shaped into uniform light with a wide viewing angle, so as to realize the reasonable distribution of luminous flux, eliminate glare, and effectively improve the light intensity. utilization rate.

Example 1: The LED array light source (1) is a 4×2 array of LEDs, each LED light-emitting chip is 1mm×1mm, and the total power is 8W. After being packaged with silica gel, it can be regarded as a light-emitting surface with a diameter of 8mm, and the half-intensity angle is 120 degrees. After passing through the total reflection compound lens (3), the light angle is 10 degrees, and the microlens array anti-glare sheet (4) is composed of a 0.1mm×0.1mm square plano-convex lens, and the convex surface is composed of two basic surfaces, as shown in Figure 4 , 401 is a spherical surface with a radius of curvature of 0.15mm, 402 is a conical surface with a cone angle of 140 degrees, and the diameter of the area occupied by the conical surface is 0.04mm. The beam distribution angle of the light source module is shown in Figure 4. In the luminous intensity curve It can be seen from the above that the luminous intensity of the beam is relatively uniform within the range of -70 degrees to +70 degrees, indicating that the beam angle is within the range of 140 degrees.

Embodiment 2: The array light source (1) is a 5×2 array LED, each small light-emitting chip is 1mm×1mm, and the total power is 10W. After being packaged with silica gel, it can be regarded as a light-emitting surface with a diameter of 10mm, and the half-intensity angle is 120 degrees. After passing through the total reflection compound lens (3), the light angle is 10 degrees, and the microlens array anti-glare sheet (4) is composed of a hexagonal plano-convex lens with a side length of 0.1mm, and the convex surface is composed of 3 basic surfaces, as shown in Figure 3 As shown, a1 is an aspheric surface, and the surface trajectory equation is:

$Z=\frac{{\mathrm{Cy}}^2}{1+\sqrt{1-(1+K)C^2{\mathrm{the\; y}}^2}}+A_1{\mathrm{the\; y}}^4+A_2{\mathrm{the\; y}}^6+A_3{\mathrm{the\; y}}^8,$ where the parameters are set to

C=2.85mm ^-1 , K=-4.15, A ₁ =2.36e-5mm ^-3 , A ₂ =7.81e-7mm ^-5 , A ₃ =-5.84e-10mm ^-7 ; b1 is the cone surface, cone angle is 165 degrees, c1 is a spherical surface, the radius of curvature is 0.15mm, and the occupied area diameter is 0.03mm. The beam distribution angle of this light source module is shown in Figure 5. It can be seen from the luminous intensity curve that the beam is at -75 degrees The luminous intensity is relatively uniform within the range of +75 degrees, indicating that the beam angle is within the range of 150 degrees.

Claims (4)

1. A low-glare high-power LED light source module, including an LED array light source (1), a lamp holder (2), the front end of the lamp holder (2) is equipped with a total reflection free-form compound lens (3), and the microlens array eliminates glare sheet (4), the rear end of the lamp holder (2) is connected to the radiator (5), the LED array light source (1) is composed of a corresponding high-power LED chip arrangement, and the total reflection free-form surface compound lens (3) Adjust the light emitted by the LED array light source (1) to 10-20 degrees. 2. A kind of low-glare high-power LED light source module as claimed in claim 1, it is characterized in that the microlens array anti-glare sheet (4) of LED is made of a plurality of compound curved surface lens arrays, and the profile of lens is regular polygon, The number of regular polygons is 3-8, and the length of each side is 0.05-0.15um. 3. A low-glare high-power LED light source module according to claim 1, characterized in that the micro-lens array anti-glare sheet (4) is composed of an aspheric surface (a) and a conical surface (b). 4. A low-glare high-power LED light source module as claimed in claim 1, characterized in that the micro-lens array anti-glare sheet (4) is composed of an aspheric surface (a1), a conical surface (b1), and an aspheric surface (c1). constitute.