CN107062025A - A kind of LED variable-angles alignment light emitting system - Google Patents

Abstract

The invention discloses an LED variable-angle collimated light-emitting system, which comprises an LED aluminum substrate, on which an LED vertical light-emitting encapsulation module is installed, and the LED vertical light-emitting encapsulation module performs a light distribution on the outgoing light once. emits Lambertian light; the LED vertical light-emitting package module is equipped with a concentrating lens or a reflective bowl, and the concentrating lens or reflective bowl is fixed on the lens base, and the passing light is distributed after a second light change. The outgoing light can be adjusted at an angle of 3° to 120°; the lens base is installed on the LED vertical light-emitting package module, and the concentrating lens or reflective bowl is provided with a fixed cup or lampshade, and the fixed cup or lampshade A curved lens is arranged inside, and the curved lens performs light distribution on the passing light three times to become collimated light. The invention distributes light for three times, converts more than 90% of the LED hemispherical light field into collimated light, and greatly improves the conversion efficiency of collimated light.

Description

A LED variable-angle collimated lighting system

technical field

The present invention relates to an LED lighting system, in particular to an LED variable-angle collimation lighting system, which can be used for LED searchlights, search lights, flashlights, video projection, automotive lighting, helicopter search lighting, video monitoring lighting, anti-terrorism lighting, Laser weapons and other fields.

Background technique

Before high-power LED lighting components become lighting products, two optical designs are usually carried out, one optical design is to solve the range and distribution of LED light output angle, light intensity, luminous flux, light intensity distribution, and color temperature. The secondary optical design needs to refract or reflect the light after the secondary lens to meet the lighting requirements of various occasions. Existing LED searchlights and search lights have a luminous angle of more than 3 degrees, even if it is less than 3 degrees, the luminous flux within the range of 3 degrees is less than 10LM/W. The short-arc xenon lamp can effectively control the light output aperture due to its small focus, but the light efficiency is too low, and the power is several kilowatts. It is used for search and rescue LED searchlights.

The current secondary optical design idea is to collimate the light emitted by the LED. The commonly used forms include curved surface concentrators (including paraboloids, spheres, ellipsoids, and hyperboloids) and free-form lenses. Using a spotting cup or a free-form surface lens alone will cause the disadvantages of too large, too heavy, or low utilization of light energy, which will cause inconvenience in use or increase manufacturing costs. The focusing cup cannot control the small-angle light emitted by the LED, while the free-form surface lens has poor control ability for large-angle light and has material absorption. The efficiency of electro-collimated light in the prior art is only 10% to 20%, and subject to the etendue theorem, the light output aperture is not controlled.

Contents of the invention

The technical problem to be solved by the present invention is to provide an LED variable-angle collimated lighting system, which can convert more than 90% of the LED hemispherical light field into collimated light, effectively control the light output aperture, and achieve the efficiency of electrical conversion into collimated light Reach more than 40%.

The technical solution adopted by the present invention to solve the above-mentioned technical problems is to provide an LED variable-angle collimated light-emitting system, including an LED aluminum substrate, wherein an LED vertical light-emitting package module is installed on the LED aluminum substrate, and the LED The vertical light-emitting package module performs a light distribution on the outgoing light and emits Lambertian light; the LED vertical light-emitting package module is equipped with a concentrating lens or a reflective bowl, and the concentrating lens or reflective bowl is fixed on the lens base On the other hand, after the secondary light distribution of the passing light, it becomes 3°~120° angle-adjustable outgoing light; the lens base is installed on the LED vertical light-emitting package module, and the concentrating lens or reflective bowl peripheral There is a fixed cup or a lampshade, and a curved lens is arranged inside the fixed cup or the lampshade, and the curved surface lens performs light distribution on the passing light three times to become collimated light.

The above-mentioned LED variable-angle collimation light-emitting system, wherein, the LED vertical light-emitting packaging module is a single-core vertical structure light-emitting blue chip, and the light-emitting blue chip is equipped with a planar phosphor structure, and the light-emitting blue chip The refractive index of the sealant layer of the color chip is 95-99%.

In the above-mentioned LED variable-angle collimation light-emitting system, wherein, the LED vertical light-emitting packaging module is connected to an external DC constant current drive power supply through a waterproof connector for power supply, and the LED vertical light-emitting packaging module, LED aluminum substrate and connecting wire The outside is covered with transparent organic silica gel, and the light transmittance of the transparent organic silica gel is 95%-98%.

The above-mentioned LED variable-angle collimated lighting system, wherein, the LED aluminum substrate is fixedly pasted on the heat dissipation module through a thermally conductive material filling layer, and the ceramic base or metal base at the bottom of the LED chip in the LED vertical lighting package module The seat is closely attached to the LED aluminum substrate, and a horizontal and outward heat transmission channel is formed among the LED aluminum substrate, the heat dissipation module and the heat dissipation holes around the casing.

In the above-mentioned LED variable-angle collimation lighting system, wherein the curved lens is a Fresnel lens, and the concentrating lens adopts a combination of total reflection and refraction for secondary light distribution, and the Fresnel lens The diameter D and the focal length H of the converging lens have the following relationship D=2H*tanθ/2, θ is the exit angle of the light after the secondary light distribution; Linear movement adjusts the focal point of the secondary light distribution to coincide with the focal point of the Fresnel lens.

In the above-mentioned LED variable-angle collimation lighting system, one end of the adjusting column is connected to the Fresnel lens, and the other end is connected to the connecting plate of the adjusting column through the heat dissipation module, and the middle of the connecting plate of the adjusting column is opened And it is connected with the screw rod of the focusing handle, and the screw rod of the focusing handle is provided with a positioning pin and a stop plate, and the heat dissipation module and the stop plate are connected with the lamp housing.

Compared with the prior art, the present invention has the following beneficial effects: the LED variable-angle collimated light-emitting system provided by the present invention performs three light distributions on the light by setting the LED vertical light-emitting package module, the concentrating lens and the Fresnel lens, More than 90% of the LED hemispherical light field is converted into collimated light. By effectively controlling the light output aperture, the efficiency of electrical conversion into collimated light reaches more than 40%.

Description of drawings

Fig. 1 is the structure schematic diagram of the LED variable-angle collimation lighting system of the present invention;

Fig. 2 is a schematic diagram of an exploded structure of an LED variable-angle collimated lighting system of the present invention;

3 is a schematic cross-sectional structure diagram of an LED variable-angle collimated lighting system according to the present invention;

4a and 4b are schematic diagrams of light-emitting circuits of the LED variable-angle collimated light-emitting system of the present invention;

Fig. 5 is a schematic diagram of the multi-module structure of the LED variable-angle collimated lighting system of the present invention.

In the picture:

1 Fixed cup 2 Fresnel lens 3 Concentrating lens

4 LED vertical light-emitting package module 5 Lens base 6 LED aluminum substrate

7 Cooling module 8 Adjusting column 9 Adjusting column connecting plate

10 positioning pin 11 stop plate 12 focusing handle

13 Lamp housing

detailed description

The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

Fig. 1 is a schematic structural diagram of the LED variable-angle collimated lighting system of the present invention; Fig. 2 is a schematic diagram of an exploded structure of the LED variable-angle collimated lighting system of the present invention; Fig. 3 is a schematic diagram of the LED variable-angle collimated lighting system of the present invention Schematic diagram of the cross-sectional structure.

Please refer to Fig. 1, Fig. 2 and Fig. 3, the LED variable-angle collimation light-emitting system provided by the present invention includes LED aluminum substrate 6, LED vertical light-emitting package module 4, concentrating lens 3, Fresnel lens 2 and Focusing handle 12 and other components, wherein the LED vertical light-emitting package module 4 adopts a vertical structure chip (front light output), after coating phosphor, after sealing with high refractive index, the primary light distribution: the light output efficiency is close to 100%, emit Lambertian light (120°); the LED vertical light-emitting package module 4 is welded on the LED aluminum substrate 6, and the LED vertical light-emitting package module 4 is externally provided with a concentrating lens 3, and the concentrating lens 3 will After the light is refracted and totally reflected, the angle becomes 3°-120°, and the light extraction efficiency is greater than 95%; the concentrating lens 3 is installed on the lens base 5, and the lens base 5 is installed on the LED vertical light-emitting package module 4, the condenser lens 3 is provided with a fixed cup 1, and the fixed cup 1 is provided with a Fresnel lens 2, and the light becomes collimated light through the Fresnel lens 2, and the light output efficiency reaches more than 98%. .

In the variable-angle collimated lighting system provided by the present invention, the heat dissipation module 7 is formed by forging or extrusion, and the LED aluminum substrate 6 is fixedly pasted on the heat dissipation module 7 through a filling layer of heat-conducting material, which can ensure good heat dissipation The heat dissipation module 7 is not limited to square, rectangular, polygonal and other forms, and there are three through holes on the front for installing the adjusting column 8 .

In the variable-angle collimated lighting system provided by the present invention, there are three threaded holes on the Fresnel lens 2, the adjustment column 8 is connected with the Fresnel lens 2 through threads, and the three adjustment columns 8 pass through the heat dissipation The three through holes corresponding to the module 7 are connected to the connecting plate 9 of the adjusting column, and there are four corresponding threaded holes on the connecting plate 9 of the adjusting column, three of which are symmetrical to the threaded holes on the heat dissipation module 7, and the middle one The threaded hole is connected with the screw rod of the focusing handle 12. There is a screw rod on the focusing handle 12, and there are two through holes on the screw rod. The positioning pin 10 is installed at the through hole of the focusing handle 12, and the stop There is a through hole in the middle of the plate 11, and the stop plate 11 is installed between the two through holes of the focusing handle 12, and is fixed and limited by the positioning pin 10. The heat dissipation module 7 and the stop plate 11 are connected with the lamp housing 13 .

In the variable-angle collimation lighting system provided by the present invention, the screw rod is rotated by the rotation of the focusing handle 12, and the thread in the screw rod on the focusing handle 12 is connected with the screw thread of the connecting plate 9 of the adjusting column. There are two positioning pins 10 and stop plate 11 on 12, causing the screw rod of focusing handle 12 to rotate, and positioning pin 10 and stop plate 11 cannot rotate and move. When the focusing handle 12 is rotated and adjusted, the adjusting column connecting plate 9 is made to reciprocate and linearly move, and the three adjusting columns 8 on the adjusting column connecting plate 9 also move reciprocatingly linearly, because the adjusting column 8 is connected to the Fresnel lens 2, thereby realizing the adjustment of the position of the Fresnel lens 2, controlling the distance between the focal point of the secondary light distribution system of the concentrating lens 3 and the focal point of the Fresnel lens 2, and making the outgoing light from the collimated light to a small angle below 10° adjustable.

Please continue to refer to Fig. 4a and Fig. 4b. The variable-angle collimated light-emitting system provided by the present invention, the LED vertical light-emitting package module 4 (light emitting from the front), is coated with phosphor and sealed with high refractive index. Light: the light output efficiency is close to 100%, and emits Lambertian light (approximately 120°); secondary light distribution: the light is refracted and totally reflected by the concentrating lens 3 at different angles, and the light output efficiency is greater than 95° %; Tertiary light distribution: the light becomes collimated light through the Fresnel lens 2, and the light output efficiency reaches more than 98%. At the same time, the diameter of the Fresnel lens 2 is effectively controlled according to the isosceles triangle theorem (the base of the isosceles triangle, and the focal length is the height corresponding to the base of the isosceles triangle row). The luminous angle and the focal length of the Fresnel lens 2 determine the Fresnel lens 2 diameter, when the focal length is fixed: the smaller the secondary light distribution angle is, the smaller the Fresnel lens 2 diameter is. The above system effectively solves the realization of LED collimated light, and breaks through the etendue theory and the industrial bottleneck that LED cannot be used as a collimated light source. By adjusting the front and rear positions of the Fresnel lens 2 and changing the focus position of the lens during the three-time light distribution, the light output angle is adjusted from collimated light to 10° light output angle, so as to meet the requirements of collimated light and be used in various fields. The present invention can make LED hemispherical light More than 90% of the field is converted into collimated light, and the light output aperture is effectively controlled. The efficiency of electricity conversion into collimated light reaches more than 40%, and the efficiency of collimated light is greater than 100Lm/W.

In the selection of Fresnel lens 2, according to the angle of secondary light distribution and the focal length of Fresnel lens 2, according to the theorem of isosceles triangle, calculate the required Fresnel lens diameter D=2H*tanθ/2. The diameter of the light outlet (Fresnel lens 2 diameter D) depends on the focal length of the selected lens and the size of the secondary light distribution angle, which can be effectively controlled within a certain range, breaking through the etendue theorem. When the focus of the secondary light distribution system coincides with the focus of Fresnel lens 2, it will convert the LED light into collimated light. Through the above system, the LED emits luminous flux Through the second light distribution and the third light distribution, the collimated light emitted through the appropriate light outlet will reach more than 90%, and the power of the lamp will be greatly reduced. More green and low-carbon environmental protection. The theoretical calculation of the collimated luminous flux is shown in the following formula:

Theoretical calculation: = Concentrating lens efficiency * Fresnel lens efficiency

Through the array design of the above-mentioned collimated light system, the modules required for lighting of lamps and lanterns are arranged. Different shapes are designed according to different needs, and the light output aperture can be controlled to effectively meet the size requirements of various actual lamps. The LED vertical light-emitting package module of the present invention adopts an array design to effectively control the size, thereby realizing the design and manufacture of high-power level products. The heat channel transfers heat through the ceramic base or metal base at the bottom of the LED chip in the LED vertical light-emitting package module 4. Since the ceramic base or metal base at the bottom is close to the LED aluminum substrate 6, the heat is transferred through the LED aluminum substrate 6 to the cooling module 7, and finally the cooling module 7 transfers heat to the air through the housing 13. Since there are many cooling holes around the housing 13, the cooling module 7 and the stop plate 11 are separated by a certain distance, thus ensuring the heat dissipation of the cooling module 7. The heat is discharged through the cooling holes around the shell, thus realizing the transmission of the heat channel.

The invention covers the light source mold circuit board with transparent silica gel to meet the explosion-proof and waterproof requirements of the special market. It can simplify the requirements of various explosion-proof and waterproof lamps. Specifically, the LED vertical light-emitting package module 4, the LED aluminum substrate 6 and the connecting wires are covered with transparent organic silica gel, and the light transmittance of the transparent organic silica gel is 95% to 98%, which effectively solves the problem of difficult waterproofing and effectively reaches the IP68 protection level.

The present invention adjusts the position of the Fresnel lens 2 through the focusing handle 12, controls the distance between the focus of the secondary light distribution system and the focus of the Fresnel lens 2, and makes the outgoing light adjustable from collimated light to a small angle below 10°, satisfying various practical applications.

The present invention describes the white light single-chip collimated light technology in detail, but cannot limit the scope of the present invention. All modifications and changes made according to the spirit of the present invention: such as changing white light to monochromatic light, LED light sources at other angles, the concentrating lens 3 is replaced by a reflective bowl, the Fresnel lens 2 is replaced by other curved lenses, multi-chip, non-vertical chips etc.

The LED variable-angle collimation lighting system of the present invention adopts an external power supply, and the external DC constant current driving power supply and the LED vertical lighting packaging module 4 are connected to supply power through waterproof connectors, thereby realizing the heat passage of the light source and the heat dissipation of the power supply. channels for effective separation. As shown in Figure 5, the optical channel is vertically upward, the thermal channel is horizontally outward, and the optical, electrical and thermal channels are effectively separated.

Although the present invention has been disclosed above with preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art may make some modifications and improvements without departing from the spirit and scope of the present invention. Therefore, the present invention The scope of protection should be defined by the claims.

Claims (6)

1. a kind of LED variable-angles alignment light emitting system, including LED aluminum base plate (6), it is characterised in that the LED aluminum base plate (6) LED vertical light-emittings package module (4) is installed, the LED vertical light-emittings package module (4) carries out one to emergent ray on Lambertian light is sent after secondary luminous intensity distribution；The LED vertical light-emittings package module (4) is externally provided with light-focusing type lens (3) or reflector, institute State light-focusing type lens (3) or reflector be fixed on lens pedestal (5), to by light carry out secondary light-distribution after become 3 °~ Hexagonal angle degree is adjustable emergent ray；The lens pedestal (5) is arranged on LED vertical light-emittings package module (4), the light-focusing type Lens (3) or reflector are externally provided with fixed cup (1) or lampshade, the fixed cup (1) or lampshade and are provided with toroidal lens, the song Face lens after light carries out three luminous intensity distributions to becoming collimated light.

2. LED variable-angles alignment light emitting system as claimed in claim 1, it is characterised in that the LED vertical light-emittings encapsulation Module (4) is single vertical structure light-emitting blue chip, and the lumiere blue chip is externally provided with flat fluorescent powder structure, described The refractive index of the adhesive layer of lumiere blue chip is 95~99%.

3. LED variable-angles alignment light emitting system as claimed in claim 1, it is characterised in that the LED vertical light-emittings encapsulation Module (4) connects external DC constant-current driving power supplies by waterproof connector and is powered, the LED vertical light-emittings package module (4), LED aluminum base plate (6) and connecting wire, which are cladded with, is stamped transparent organic silicon glue, and the light transmittance of the transparent organic silicon glue is 95% ~98%.

4. LED variable-angles alignment light emitting system as claimed in claim 1, it is characterised in that the LED aluminum base plate (6) is led to Cross the fixation of Heat Conduction Material packed layer to stick on radiating module (7), the LED chip in the LED vertical light-emittings package module (4) Bottom base of ceramic or metal base are close to LED aluminum base plate (6), the LED aluminum base plate (6), radiating module (7) and housing (13) heat transfer channel horizontally outward is formed between the heat emission hole of surrounding.

5. LED variable-angles alignment light emitting system as claimed in claim 4, it is characterised in that the toroidal lens is luxuriant and rich with fragrance alunite That lens (2), the light-focusing type lens (3) are using total reflection and refraction combination progress secondary light-distribution, and the Fresnel is saturating The diameter D of mirror (2) and the focal length H of light-focusing type lens (3) have following relation D=2H*tan θ/2, θ for after light secondary light-distribution Shooting angle；The Fresnel Lenses (2) is connected with adjustable column (8), and moves regulation by the reciprocating linear of adjustable column (8) Secondary light-distribution focus and the focus of Fresnel Lenses (2) coincide.

6. LED variable-angles alignment light emitting system as claimed in claim 5, it is characterised in that one end of the adjustable column (8) It is connected with Fresnel Lenses (2), the other end is attached through radiating module (7) with adjustable column connecting plate (9), the adjustable column Connecting plate (9) central aperture is simultaneously connected with the screw rod of focusing handle (12), and the screw rod of the focusing handle (12) is provided with positioning (10) and check plate (11) are sold, the radiating module (7) and check plate (11) are attached with lamp casing (13).