CN118011650A - Multichannel LED (light-emitting diode) shrinking light homogenizing equipment - Google Patents

Abstract

The invention relates to multi-channel LED (light-emitting diode) shrinking light-homogenizing equipment, which comprises a shell, a light-mixing device, a light-homogenizing device and a light source plate, wherein the light-mixing device, the light-homogenizing device and the light source plate are arranged in the shell, one side of the shell is provided with a light outlet, the light source plate is distributed on the outer side of the light-mixing device, the light-homogenizing device is positioned between the light-mixing device and the light outlet, the light-mixing device comprises a diffusion plate assembly and a light-mixing cavity surrounded by the diffusion plate assembly, the light-homogenizing device comprises a light-homogenizing cavity, and illumination light emitted by the light source plate enters the light-mixing cavity through the diffusion plate assembly to be mixed uniformly, and then enters the light-homogenizing cavity to be emitted through the light outlet. The invention provides a multi-channel LED (light-emitting diode) shrinking light homogenizing device which is used for carrying out efficient color mixing on light rays with different color temperatures and different peak wavelengths emitted from a light source plate through a light mixing cavity, enabling the light rays to enter a light homogenizing cavity after uniform color mixing, and enabling the light rays to be irradiated from a light outlet after light homogenizing treatment of the light homogenizing cavity, so that uniform light emitting color mixing and uniform light emergent degree (luminous exitance) are realized.

Description

Multichannel LED (light-emitting diode) shrinking light homogenizing equipment

Technical Field

The invention relates to a light homogenizing device, in particular to a multichannel LED (light emitting diode) shrinking light homogenizing device.

Background

Uniform light sources play an important role in a variety of fields, particularly when optics and camera detection are involved. For example, after the camera is assembled, the camera needs to perform corresponding flat field correction, white balance correction, and the like, and at this time, a uniform light source is needed, so that the accuracy of the detection result is affected due to the advantages and disadvantages of the illumination effect of the uniform light source.

In the prior art, chinese patent publication No. CN106574865B discloses a lighting device comprising a homogenizing device and being adapted to be connected to a light source, wherein the homogenizing device has an inlet opening, an inlet chamber arranged behind the inlet opening, an intermediate chamber, an outlet chamber and an outlet opening arranged behind the outlet chamber, and the inlet chamber, the intermediate chamber and the outlet chamber each have an outer face and an inner face, and the inlet chamber extends along a first main axis and the outlet chamber extends along a second main axis, and the light source arranged in the area of the inlet opening can emit light through the inlet chamber, the intermediate chamber, the outlet chamber and the outlet opening onto an object to be illuminated, characterized in that the light beam cannot reach the point of the outlet opening from the point of the inlet opening in a straight line, and in that at least the inner faces of the inlet chamber, the intermediate chamber and the outlet chamber each are diffusely reflective inner faces in at least one first area. Although the technical scheme can realize uniform color mixing of light, the device protected by the technical scheme is arranged outside the light source, and in order to improve the uniformity of color mixing of light, the device needs to have enough axial light mixing length, so that the device has larger volume, higher cost and inconvenient carrying and transportation.

The Chinese patent with the publication number of CN110456593A discloses a large-view-field uniform light source system, and the technical scheme combines a plurality of LED area array lamp panels and a spherical diffusion plate to realize the emergent of the large-view-field uniform light source, and has the advantages of compact structure and small volume. The LED area array type lamp panel comprises lamp beads with different peak wavelengths or color temperatures of a plurality of channels, the color temperature and brightness are adjusted, the spherical diffusion plate adopts high diffuse reflection optical materials to realize uniform light, the covered angle exceeds 180 degrees, and meanwhile recalibration of the light source can be realized by combining control software. However, in the technical scheme, the spherical diffusion plate is a light outlet, and lamps with different colors of the lamp panels directly irradiate on the spherical diffusion plate, so that the multi-channel lights with different colors are not uniformly mixed and are emitted out through the light outlet surface, and the uniformity of mixed light and the uniformity of the light brightness are greatly influenced.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention aims to provide the multichannel LED miniaturization light homogenizing equipment which can realize efficient color mixing of light rays and has high illuminance uniformity.

In order to solve the problems, the technical scheme adopted by the invention is as follows:

The utility model provides a multichannel LED minification even light equipment, includes the shell and sets up in the inside light mixing device of shell, even light device and light source board, the light outlet has been seted up to shell one side, the light source board distributes in the outside of light mixing device, even light device is located between light mixing device and the light outlet, light mixing device includes the diffuser plate subassembly and encloses the light mixing chamber that forms by the diffuser plate subassembly, even light device includes even light chamber, the irradiation light that the light source board sent gets into the light mixing chamber through the diffuser plate subassembly and mixes the colour mixture evenly, reentrant even light chamber even light is followed and is penetrated out through the light outlet.

Further, the diffuser plate subassembly includes preceding diffuser plate, side diffuser plate and back diffuser plate, preceding diffuser plate and the relative interval distribution of back diffuser plate, just preceding diffuser plate is located the one end that is close to the light outlet, side diffuser plate connects between preceding diffuser plate and back diffuser plate, just have partial slope section on the side diffuser plate, along the direction from preceding diffuser plate to back diffuser plate, the distance of slope section relative preceding diffuser plate axis D increases gradually.

Further, the light homogenizing device further comprises a light outlet diffusion plate, a reflecting plate and a light homogenizing component, wherein the light outlet diffusion plate is arranged at the light outlet, the reflecting plate is arranged between the light outlet and the front diffusion plate, and the light homogenizing cavity is formed by surrounding the light outlet diffusion plate, the reflecting plate and the front diffusion plate.

Further, the light homogenizing component is located in the light homogenizing cavity, the light homogenizing component is in a cone-shaped structure, and the small end of the cone-shaped structure is located at one end close to the light outlet.

Further, the ratio of the cone height H1 of the dodging component to the height H2 of the dodging cavity is 5% -85%.

Further, an included angle alpha between the inclined section and the central axis D is 5-60 degrees.

Further, the front diffusion plate, the side diffusion plate, the rear diffusion plate, and the light-transmitting plate are each made of a semi-transparent optical property material having a high diffuse transmission property, and the reflection plate is made of a material having a high diffuse reflection property.

Further, a plurality of radiating fins which are distributed at intervals are uniformly distributed on the shell.

Further, the number of the light source plates is at least one.

Compared with the prior art, the invention has the beneficial effects that: according to the invention, the light source plate, the light mixing device and the light homogenizing device are integrally arranged in the shell, so that the volume of equipment can be greatly reduced, the number of the light source plates can be set according to requirements, and the sufficient illumination degree is ensured; the light mixing device enables light to be segregated in the light cavity through the inclined section Xiang Hun through ingenious structural design, so that more scattering opportunities are generated, and the uniformity of color mixing is improved; when the light source plate is used, the light rays with different color temperatures and different peak wavelengths emitted from the light source plate are mixed by the light mixing cavity of the light mixing device, the mixed light is uniformly mixed, then enters the light homogenizing cavity through the front diffusion plate, and the light is emitted through the light outlet after the light homogenizing treatment in the light homogenizing cavity; the light homogenizing cavity is combined with the light mixing cavity, so that the light is uniform in color mixing, and the illuminance uniformity is higher, and the use requirements of various application occasions can be fully met.

Drawings

FIG. 1 is a perspective view of a multi-channel LED miniaturized dodging device of the present invention;

FIG. 2 is a front view of a multi-channel LED reduction dodging device of the present invention;

FIG. 3 is a schematic cross-sectional view taken along the direction A-A in FIG. 2;

FIG. 4 is a schematic structural diagram of a light mixing device in a multi-channel LED miniaturized light homogenizing apparatus according to the present invention;

FIG. 5 is a schematic cross-sectional view of another embodiment of FIG. 2 taken along the direction A-A;

FIG. 6 is a schematic cross-sectional view taken along the direction B-B of FIG. 3 in another embodiment;

wherein, 1, the shell; 2. a front cover; 21. a light outlet; 3. a light source board; 4. a light mixing device; 41. a side diffusion plate; 411. a straight section; 412. an inclined section; 42. A front diffusion plate; 43. a rear diffusion plate; 5. a light homogenizing component; 51. a light homogenizing plate; 6. a light-emitting diffusion plate; 7. a reflection plate; 8. a light mixing cavity; 9. a light homogenizing device; 91. and a light homogenizing cavity.

Detailed Description

The invention is described in further detail below with reference to the drawings and the detailed description.

In the description of the technical solution of the present invention, some azimuth terms, such as "front", "rear", "upper", "lower", "top", "bottom", "inner", "outer", etc., are used for clearly describing the technical features of the present invention, and are all according to the azimuth of the drawings of the present invention.

Examples

As shown in fig. 1, 2 and 3, a multi-channel LED miniaturized light homogenizing apparatus of this embodiment includes a housing 1, a light mixing device 4, a light homogenizing device 9 and a light source plate 3 disposed inside the housing 1, a front cover 2 disposed on one side of the housing 1, and a light outlet 21 for light passing through is formed in the middle of the front cover 2. The light source board 3 distributes in the outside of mixing device 4, and dodging device 9 is located between mixing device 4 and the light outlet 21, and mixing device 4 includes the diffuser plate subassembly and encloses the light mixing chamber 8 that forms by the diffuser plate subassembly, and dodging device 9 includes dodging chamber 91, and the illumination light that light source board 3 sent gets into the light mixing chamber 8 through the diffuser plate subassembly and mixes the colour mixture evenly, reentrant dodging chamber 91 dodging evenly back is penetrated out through the light outlet 21. The central axes of the light outlet 21, the light homogenizing cavity 91 and the light mixing cavity 8 are mutually overlapped.

Specifically, the diffuser plate assembly includes a front diffuser plate 42, a side diffuser plate 41 and a rear diffuser plate 43, wherein the front diffuser plate 42 and the rear diffuser plate 43 are distributed at opposite intervals, and the front diffuser plate 42 and the rear diffuser plate 43 have the same projection shape on a vertical plane, and are of a circular structure or a regular polygon structure. The front diffusion plate 42 is located at one end near the light outlet 21, the central axis of the front diffusion plate 42 coincides with the central axis of the rear diffusion plate 43, and the projection area of the front diffusion plate 42 on the rear diffusion plate 43 is smaller than the projection area of the rear diffusion plate 43 on the surface. The side diffusion plates 41 are connected between the front diffusion plate 42 and the rear diffusion plate 43, the side diffusion plates 41 are disposed in one-to-one correspondence with the sides of the front diffusion plate 42, and the plurality of side diffusion plates 41 are circumferentially distributed around the central axis of the front diffusion plate 41. In particular, in the present embodiment, the front diffusion plate 42 and the rear diffusion plate 43 each have a regular quadrilateral structure, and the side diffusion plates 41 have four pieces connected between four sides of the front diffusion plate 42 and the rear diffusion plate 43, respectively.

The light mixing chamber 8 in this embodiment is surrounded by a side diffuser 41, a front diffuser 42 and a rear diffuser 43. In this embodiment, the side diffusion plate 41 has at least a part of the inclined section 412, and the distance between the inclined section 412 and the central axis D of the front diffusion plate 42 increases gradually along the direction from the front diffusion plate 42 to the rear diffusion plate 43. The angle α between the inclined segment 412 and the central axis D is 5-60 degrees. When the side diffusion plates 41 are all inclined sections 412 as a whole, the included angle α is preferably 10 to 25 degrees in the present embodiment (refer to fig. 3). When only a portion of the side diffusion plate 41 is the inclined section 412, the included angle α is preferably 25 to 35 degrees in the present embodiment. Referring to fig. 5, when only a portion of the side diffusion plate 41 is the inclined section 412, the side diffusion plate 41 includes the straight section 411 and the inclined section 412 connected together, and preferably the projection length of the inclined section 412 in the horizontal direction is greater than or equal to one half of the projection length of the side diffusion plate 41 in the horizontal direction, so as to ensure that enough light is segregated into the interior of the light mixing chamber 8 through the inclined section 412, and to improve the color mixing effect.

Since the light mixing device 4 has an insufficient uniformity of brightness of light emitted from the front diffusion plate 42 after uniform color mixing, the light mixing device 9 is provided in this embodiment, and the light mixing device 9 further includes a light emitting diffusion plate 6, a reflection plate 7, and a light mixing module 5, wherein the light emitting diffusion plate 6 is mounted at the light emitting opening 21, the reflection plate 7 is mounted between the light emitting opening 21 and the front diffusion plate 42, and the light mixing cavity 91 is surrounded by the light emitting diffusion plate 6, the reflection plate 7, and the front diffusion plate 42 (see fig. 3 or 5). The light-emitting diffusion plate 6 and the reflection plate 7 are both used for homogenizing light entering the homogenizing chamber 91. The light homogenizing component 5 is disposed in the light homogenizing cavity 91 in this embodiment, so as to shorten the length of the light homogenizing cavity 91 and achieve better light homogenizing effect. The light homogenizing module 5 has a cone-shaped structure (refer to fig. 6), and a small end of the cone-shaped structure is located near one end of the light outlet 21. In this embodiment, the sidewall of the light homogenizing component 5 is surrounded by one or more light homogenizing plates 51. One light-homogenizing plate 51 may be enclosed to form a conical structure, and a plurality of light-homogenizing plates 51 may be enclosed to form a pyramid with a regular polygon bottom surface. After the light enters the light homogenizing cavity 91, the light is reflected and diffused by the light homogenizing component 5, the reflecting plate 7 and the light transmitting plate 6, so that the illuminance of the light irradiated from the light outlet 21 is more uniform. When the light outlet 21 and the bottom surface of the light homogenizing component 5 are both regular polygon structures, the present invention does not limit the placement angle of the light homogenizing component 5, that is, the included angle between the side edge of the bottom surface of the light homogenizing component 5 and the side edge of the light outlet 21 may be in the range of 0-180 degrees. And the projection of the light homogenizing component 5 on the surface of the light outlet 21 can completely cover the light outlet 21 so as to ensure the light outlet effect. The ratio of the cone height H1 of the dodging component 5 to the height H2 of the dodging cavity 91 is 5% to 85%. In this embodiment, the ratio of the cone height H1 of the dodging component 5 to the height H2 of the dodging cavity 91 is preferably 45% -55%. By adopting the structural design, the illumination uniformity of the light emitting area is better.

The front diffusion plate 42, the side diffusion plate 41, the rear diffusion plate 43, the light-homogenizing plate 51 and the light-transmitting plate 6 are made of a semi-transmissive material having a high diffuse transmission property, such as a fog glass, or a semi-transmissive material having a similar high diffuse transmission property, such as a transmission grating, to mainly exert a light-diffusing effect. The reflective surface of the reflective plate 7 is made of a material having high diffuse reflection characteristics or a material similar to the high diffuse reflection characteristics. Such as white matte diffuse reflection paint and white frosted diffuse reflection light diffusion paper; the reflecting surface of the reflecting plate 7 may also be made of a material having high reflection mirror characteristics, such as mirror paper, a mirror, etc., and mainly functions to reflect light.

The light source plates 3 are mounted on the inner wall of the housing 1 in this embodiment, and the number of the light source plates 3 is at least one. When the front diffusion plate 42 adopts a regular quadrilateral structure, the number of the light source plates 3 can be five, the five light source plates 3 respectively correspond to the rear diffusion plate 43 and the four side diffusion plates 41 to be distributed, each light source plate 3 is provided with a plurality of LED lamp beads with different color temperatures and different peak wavelengths, light emitted by the LED lamp beads enters the light mixing cavity 8 after being refracted by the corresponding side diffusion plate 41 or the rear diffusion plate 43, and the light emitted by the light mixing cavity 8 and other LED lamp beads are mixed until the mixed light is uniformly irradiated from the front diffusion plate 42 and enters the light homogenizing cavity 91. Since the side diffusion plate 41 is provided with at least a part of the inclined section 412, when the light emitted by the led lamp beads is refracted by the inclined section 412 and enters the light mixing cavity 8, the light is segregated in a direction away from the front diffusion plate 42, so that the light has more refraction and diffusion opportunities in the light mixing cavity, and the uniformity of color mixing is further improved.

The shell 1 is uniformly provided with a plurality of radiating fins distributed at intervals, the radiating fins are combined with the shell 1, the integral structural strength of the shell 1 is improved, the radiating efficiency of the light homogenizing equipment is greatly improved while the volume of the equipment is not increased, and the heat inside the equipment is quickly and efficiently conducted to the outside air so as to slow down the ageing of the internal elements of the equipment.

According to the multi-channel LED shrinking light homogenizing device, the light source plate 3, the light mixing device 4 and the light homogenizing device 9 are integrally arranged in the shell 1, so that the size of the device can be greatly reduced, the number of the light source plates 3 can be set according to requirements, and the sufficient illumination degree is ensured; the light mixing device 4 enables light to be segregated into the light mixing cavity 8 through the inclined section 412 through ingenious structural design, and is beneficial to improving the uniformity of color mixing; when in use, the light rays with different color temperatures and different peak wavelengths emitted from the light source plate 3 are mixed by the light mixing cavity 8 of the light mixing device 4, the mixed light is uniformly mixed, then enters the light homogenizing cavity 91 through the front diffusion plate 42, and after the light homogenizing treatment in the light homogenizing cavity 91, the light is emitted through the light outlet 21; the light homogenizing cavity 91 is combined with the light mixing cavity 8, so that the light mixing and the light emergent degree (luminous exitance) are uniform, and the use requirements of various application occasions can be fully met.

It will be apparent to those skilled in the art from this disclosure that various other changes and modifications can be made which are within the scope of the invention as defined in the appended claims.

Claims (9)

1. A multichannel LED minification dodging device is characterized in that: including shell (1) and set up in the inside light mixing device (4) of shell (1), dodging device (9) and light source board (3), light outlet (21) have been seted up to shell (1) one side, light source board (3) distribute in the outside of light mixing device (4), dodging device (9) are located between light mixing device (4) and light outlet (21), light mixing device (4) include diffuser plate subassembly and enclose the light mixing chamber (8) that establish by the diffuser plate subassembly, dodging device (9) include light mixing chamber (91), the illumination light that light source board (3) sent gets into light mixing chamber (8) through diffuser plate subassembly in the colour mixture evenly, reentrant light mixing chamber (91) even back is penetrated and is penetrated out through light outlet (21).

2. The multi-channel LED reduction dodging device of claim 1, wherein: the diffusion plate assembly comprises a front diffusion plate (42), a side diffusion plate (41) and a rear diffusion plate (43), wherein the front diffusion plate (42) and the rear diffusion plate (43) are relatively distributed at intervals, the front diffusion plate (42) is located at one end close to the light outlet (21), the side diffusion plate (41) is connected between the front diffusion plate (42) and the rear diffusion plate (43), the side diffusion plate (41) is provided with at least one part of inclined section (412), and the distance between the inclined section (412) and the central axis (D) of the front diffusion plate (42) is gradually increased along the direction from the front diffusion plate (42) to the rear diffusion plate (43).

3. The multi-channel LED reduction dodging device of claim 1, wherein: the light homogenizing device (9) further comprises a light-emitting diffusion plate (6), a reflecting plate (7) and a light homogenizing component (5), the light-emitting diffusion plate (6) is arranged at the light-emitting opening (21), the reflecting plate (7) is arranged between the light-emitting opening (21) and the front diffusion plate (42), and the light homogenizing cavity (91) is formed by surrounding the light-emitting diffusion plate (6), the reflecting plate (7) and the front diffusion plate (42).

4. A multi-channel LED reduction dodging device as recited in claim 3, wherein: the light homogenizing component (5) is positioned in the light homogenizing cavity (91), the light homogenizing component (5) is in a cone-shaped structure, and the small end of the cone-shaped structure is positioned at one end close to the light outlet (21).

5. The multi-channel LED shrink light fixture of claim 4, wherein: the ratio of the cone height (H1) of the light homogenizing component (5) to the height (H2) of the light homogenizing device (9) is 5-85%.

6. The multi-channel LED reduction dodging device of claim 2, wherein: the included angle alpha between the inclined section (412) and the central axis (D) is 5-60 degrees.

7. The multi-channel LED reduction dodging device of claim 1, wherein: the front diffusion plate (42), the side diffusion plate (41), the rear diffusion plate (43) and the light-emitting diffusion plate (6) are made of semi-transparent optical characteristic materials with high diffuse transmission characteristics, and the reflecting plate (7) is made of materials with high diffuse reflection characteristics.

8. The multi-channel LED reduction dodging device of claim 1, wherein: a plurality of radiating fins which are distributed at intervals are uniformly distributed on the shell (1).

9. The multi-channel LED reduction dodging device of claim 1, wherein: the number of the light source plates (3) is at least one.