CN103528019A - Rectangular optical reflecting type light source structure - Google Patents

Abstract

The invention discloses a rectangular optical reflective light source structure. A plurality of square optical reflectors are arranged to form a rectangular array. Each square optical reflector is a bowl-shaped structure with an upper opening. The bottom of the bowl-shaped structure and the surrounding four surfaces Both are curved surfaces with parabolic cross-sections, and an LED light source is arranged above each square optical reflector. The invention can generate uniform rectangular illumination, has simple manufacturing process, low cost and can effectively dissipate heat.

Description

A rectangular optical reflective light source structure

technical field

The invention relates to the lighting field, in particular to a rectangular optical reflective light source structure.                  

Background technique

Semiconductor lighting has been widely promoted, and a large number of lamps mainly based on LED lamps are used. Among them, technologies such as LED backlight and LED flat light have not yet fully matured. The main reasons are: (1) The point light source of the LED chip has a low conversion efficiency when forming a flat light source; The light source also needs structures such as flash film and diffusion film. (3) It is common for TVs, mobile phones and other backlights to use a side-firing structure, but the light efficiency is relatively low; (4) TVs also use a direct-light structure, which has high light efficiency, but still requires diffusion film technology.

Nowadays, LED technology also uses reflective cup reflection or lens refraction to make the LED light distribution not appear Lambertian phenomenon, avoiding the problem of uneven illumination, but the use of LED light source through lens refraction will greatly weaken the intensity of light, reducing the The utilization rate of light, and the use of reflective cup reflection technology, most of the reflectors on the market still use rotary reflectors, and their irradiation range is circular, but some cases require different irradiation ranges, such as rectangular irradiation ranges, this reflector cannot fulfil requirements.

A reflector that can form a rectangular irradiation range has also appeared in the prior art. The Chinese patent application number is 201110105807.8, which discloses a rectangular emitter and an LED lamp. The rectangular emitter can produce a rectangular light source due to the difference in its side reflection surface. However, due to the different structures of its side reflective surfaces, the manufacturing process and manufacturing process are relatively complicated, and the invention does not mention heat dissipation devices. Although its emitters and lamps are small in size, if there is no heat dissipation device for the long-term use of LED lamps, it is still It will affect the life of the lamp, and it will affect the illumination over time, resulting in uneven illumination.

Another Chinese patent application number is 200810155880.4, which discloses a high-power LED street lamp. This invention can produce a rectangular lighting area and is equipped with a heat dissipation device, but the reflector of this invention uses four pieces of triangular or inverted trapezoidal reflectors. Although the formed concave pyramid-shaped reflector can produce a rectangular lighting area, the side structures of the reflectors are not the same, the manufacturing process is still somewhat complicated, and the reflective effect is not better than that of the curved surface reflector.

Contents of the invention

In view of the above problems, the object of the present invention is to provide a rectangular optical reflective light source structure that can save the diffusion film part of the light source, greatly improve the light output rate of the light source and effectively dissipate heat.

Another object of the present invention is to simplify the manufacturing process of the reflector for producing a rectangular light source and reduce the manufacturing cost of the rectangular light source.

To achieve the above object, the technical solution of the present invention is as follows:

A rectangular optical reflective light source structure, which consists of a plurality of square optical reflectors arranged to form a rectangular array, each square optical reflector is a bowl-shaped structure with an upper opening, and the bottom and four surrounding surfaces of the bowl-shaped structure are cross-sectional. The curved surface of the parabola, and an LED light source is arranged above each square optical reflector.

The square optical reflector of the present invention can be a curved surface with the same structure of the four side reflection surfaces and the bottom reflection surface and a parabolic cross section, or a parabolic cross section with the same structure of the four side reflection surfaces but different structures of the bottom reflection surface Curved surface, both of these structures can produce high reflection efficiency for light and form a uniform rectangular light source.

Preferably, the LED light source and the square optical reflector are located on the same central axis.

Preferably, the square optical reflector is coated with an optical reflection film.

Preferably, the optical reflection film is an aluminum film.

In the present invention, the square optical reflector is coated with an optical reflection film, which can enhance the reflection effect of light and play a role of strengthening illumination. The reflective film can be aluminum film or other reflective films that meet the requirements of reflectivity.

Preferably, the plurality of square optical reflectors are connected through a mounting bracket, the LED light source is arranged on the mounting bracket, and the head of the LED light source faces the bottom reflective surface of the square optical reflector.

Preferably, the installation bracket includes a rectangular frame, and the rectangular frame is provided with a plurality of parallel installation bars for installing LED light sources.

Preferably, a cooling element is provided on the mounting bracket.

The present invention also has a good heat dissipation function, can ensure that the uniform illumination is not affected by the high temperature of the lamp, and has a long service life.

Preferably, the front of the rectangular optical reflective light source structure is provided with a light-transmitting tempered glass shield.

The inventiveness of the present invention lies in that the square optical reflector is used to reflect light from the LED light source to generate square light spots, and the arrayed square light reflectors can combine the square light spots to produce a rectangular light source. The generation method of this rectangular light source is different from the existing technology. In the prior art, most of them directly generate a rectangular light source, and then form a large rectangular light source through an array of LED light sources. The reflective cup structure adopted in this way is a must The structure of the emitting surface cannot be exactly the same, at most two pairs are the same, and some technologies are even more complicated. However, the structure of the four side reflectors of the square reflector that produces the square spot in the present invention is the same, the manufacturing process is simple, and the manufacturing cost can be saved; at the same time, the structure of the side reflector adopts a parabolic curved surface in section, and such a structure has opposite The reflection effect of the light source is very good, which can produce a uniform lighting effect without the use of diffusion film technology.

Compared with prior art, the beneficial effect that the present invention has is:

The present invention is a single square optical emitter with uniform light output and high light output efficiency, as well as a square light spot. Multiple square optical emitters are arranged in an array to form a rectangular light source, saving the diffusion film part of the light source, and greatly improving the light output of the light source. The efficiency is high, and the manufacturing process of the side reflective surface with the same structure is simple, which saves the cost of the light source.

Description of drawings

Fig. 1 is a structural representation of the present invention;

Fig. 2 is a schematic diagram of an array structure of a square optical reflector;

Fig. 3 is the array type front view of square optical reflector;

Fig. 4 is a schematic diagram of the structure of the mounting bracket;

Figure 5 is a single square optical reflector;

6 is an optical schematic diagram of a single square optical reflective LED light source;

Fig. 7 is an optical schematic diagram of a rectangular optical reflective light source structure.

In the figure: 1. Light-receiving surface 2. Light-transmitting tempered glass guard 3. Mounting bracket 4. LED light source 5. Square optical reflector 6. Light 7. Right reflective surface of a single square optical reflector 8. Ortho-shaped optical reflector 9. The front reflective surface of the square optical reflector 10. The left reflective surface of the square optical reflector 11. The rear reflective surface of the square optical reflector. the

Detailed ways

The present invention will be further described below in conjunction with accompanying drawing and specific embodiment.

Example

Combining the structural assembly of Figure 1, Figure 2 and Figure 3 can produce a rectangular optical reflective light source, and the square optical reflector and LED light source are in a matrix, with 8 pieces each.

As shown in Figure 4, the LED light source 4 is arranged on the mounting bracket 3, and the head of the LED light source 4 is facing the bottom reflective surface 8 of the square optical reflector, the mounting bracket 3 includes a rectangular frame, and the rectangular frame is set There are four parallel mounting bars for mounting the LED light source 4, and the mounting bracket 3 is also provided with a heat sink.

As shown in FIG. 3 , a light-transmitting toughened glass guard plate 2 is provided on the front of the rectangular optical reflective light source structure.

3 and 5, the square optical reflector 5 has four identical side reflective surfaces and bottom reflective surfaces, each square optical reflector is a bowl-shaped structure with an upper opening, the bottom of the bowl-shaped structure and the surrounding The four surfaces are all curved surfaces with a parabolic cross-section. It can be seen from the figure that the overall structure of a single square reflector looks like a net. Due to the parabolic surface structure of the reflecting surface, the light utilization rate can be maximized and uniform illumination can be generated. .

It can be seen from Fig. 6 and Fig. 7 that the working principle of the present invention is that each LED light source corresponds to each square optical reflector one by one, and a single LED light source emits light to the reflecting surface of its corresponding single square optical reflector. Most of the light will be reflected by the reflective surface, and then exit to the light-receiving surface outside a single square optical reflector to form a square spot. .

In this embodiment, the LED light source selects a power type LED with a control current of 350mA and a voltage of 3V, and the luminous flux is 100 lumens. The size of the square optical reflector in a rectangular array is 300mm×300mm, and the size of the formed rectangular optical reflective light source is 1200mm×1200mm. The rectangular frame of the rectangular optical reflective light source is made of aluminum, the mounting bracket of the LED light source and its cooling parts are made of aluminum, and the square optical reflector is coated with aluminum film.

Claims (8)

1. A rectangular optical reflective light source structure, characterized in that a plurality of square optical reflectors are arranged to form a rectangular array, each square optical reflector is a bowl-shaped structure with an upper opening, and the bottom of the bowl-shaped structure and surrounding four Each surface is a curved surface with a parabolic section, and an LED light source is arranged above each square optical reflector. 2. A rectangular optical reflective light source structure according to claim 1, wherein the LED light source and the square optical reflector are located on the same central axis. 3. A rectangular optical reflective light source structure according to claim 1 or 2, characterized in that said square optical reflector is coated with an optical reflective film. 4. A rectangular optical reflective light source structure according to claim 3, characterized in that said optical reflective film is an aluminum film. 5. A rectangular optical reflective light source structure according to claim 1 or 2, characterized in that, the plurality of square optical reflectors are connected by a mounting bracket, the LED light source is arranged on the mounting bracket, and The head of the LED light source faces the reflection surface at the bottom of the square optical reflector. 6 . The rectangular optical reflective light source structure according to claim 5 , wherein the mounting bracket comprises a rectangular frame, and the rectangular frame is provided with a plurality of parallel mounting bars for mounting the LED light source. 7 . 7. A rectangular optical reflective light source structure according to claim 6, characterized in that a heat sink is provided on the mounting bracket. 8. A rectangular optical reflective light source structure according to claim 1 or 7, characterized in that the front of the rectangular optical reflective light source structure is provided with a light-transmitting tempered glass guard.

Images