CN110566825A - LED light mixing system - Google Patents

Abstract

The invention discloses an LED light mixing system which comprises a plurality of LEDs arranged in a certain pattern or shape and a PCB used for installing the LEDs, wherein a light mixing module is arranged in the light emitting direction of the LEDs, the shape of the cross section of the light mixing module is matched with the shape formed by the arrangement of the LEDs, a gap for light emitted by the LEDs to pass through is arranged on the light mixing module, and at least part of the light emitted by the LEDs is emitted after being reflected and mixed by the light mixing module. According to the technical scheme, the light mixing module is arranged in the light emitting direction of the LED, so that at least part of the light emitting light beams of the LED are emitted after light mixing and color mixing of the light mixing module, and the beneficial effects of color mixing and uniformity of mixed light are achieved. Compared with the traditional light mixing technology, the light mixing device has the advantages of uniform, simple and effective color mixing and cost saving.

Description

LED light mixing system

Technical Field

The invention relates to the technical field of light mixing, in particular to an LED light mixing system.

Background

In the prior art, to obtain a high-power lighting system, a plurality of LEDs are generally arranged together according to a certain quantity ratio, and the brightness of the LEDs is enough to replace the traditional platinum bulb. However, since the plurality of LEDs emit light together, the local light spot is easily over-bright. In this case, the conventional techniques mostly use a light guide or an integrator to mix light. However, in a light source that mixes light with a light guide or an integrator, an angle is formed depending on the beam angle, and a so-called dark band region is formed. On the other hand, to obtain better color mixing and light mixing effects, highly precise process improvement needs to be performed on the structure of the light guide body or the integrator, and a large amount of time, energy and cost need to be invested, so that the development of the LED is restricted.

Disclosure of Invention

The present invention is directed to overcome at least one of the above-mentioned drawbacks of the prior art, and provides an LED light mixing system with uniform color mixing and light mixing, which is used to solve the problem of non-uniform light mixing of LED light sources.

The technical scheme includes that the LED light mixing system comprises a plurality of LEDs arranged in a certain pattern or shape and a PCB used for mounting the LEDs, a light mixing module is arranged in the light emitting direction of the LEDs, the shape of the cross section of the light mixing module is matched with the shape formed by the arrangement of the LEDs, a gap for light emitted by the LEDs to pass through is formed in the light mixing module, and at least part of the light emitted by the LEDs is emitted after being reflected and mixed by the side wall of the gap formed by the light mixing module.

In this technical scheme, mix the optical module and establish on LED's light-emitting direction, when the light beam that LED sent mixes the optical module, few partial light beam directly passes from the clearance that mixes the optical module directly, and most light is certain angle and gets into mix the optical module, throw in the lateral wall that mixes the optical module to go back and forth between the lateral wall that mixes the optical module and reflect the back emergence many times, realize mixing the light evenly.

When the traditional LED is not directly projected by the light mixing module, the problems of high brightness in the middle of a light spot and low brightness around the light spot exist, and the illumination effect is influenced. Compared with the light mixing method using an integrator and a light guide body, the light mixing module of the technical scheme mixes light through diffuse reflection, and the light mixing effect is more uniform. And for the light sources arranged by a plurality of LEDs, the light guide body or the integrator is arranged in one-to-one correspondence with the LEDs and then mixes light, dark areas are easily generated between adjacent LEDs, and the light mixing module mixes light for the whole light source group, so that formed light spots are more uniform.

Wherein the LED may be a single color or may be a multi-color LED. After light emitted by the LED enters the light mixing module to be reflected back and forth for multiple times, light spots which are free of obvious color blocks and uniform in color mixing are projected.

Wherein the shape of the light mixing module is designed according to the shape formed by the arrangement of the LEDs. Therefore, the light mixing module can cover the LED, and the LED is prevented from leaking light. For example, when the LEDs are arranged in a matrix, the light mixing module is also designed in a matrix; when the LEDs are arranged in a circular shape, the light mixing module is also designed in a circular shape; when the LEDs are arranged in a spiral shape, the light mixing module is arranged in a spiral shape.

Furthermore, the light mixing module is composed of a plurality of light mixing assemblies which are designed in an annular mode and different in size, the centers of the light mixing assemblies are arranged on the same axis from small to large according to the size and are arranged from inside to outside, and gaps are reserved between the adjacent light mixing assemblies. The light mixing assemblies are concentrically arranged, so that the gap between the two light mixing assemblies is annular, the width of the same annular gap is uniform, the light mixing degree of the LEDs in the same annular gap is consistent, and the light spot brightness is uniform.

The LED light source comprises a light source, a light mixing component, a light source module and a light guide module, wherein a small part of the light emitted by the LED directly emits through a gap, and a large part of the light enters the light mixing component at a certain.

Further, a collimating lens is arranged between the LED and the light mixing module, and the collimating lens is tightly attached to the LED. The light emitted by the LED enters the collimating lens to the maximum extent, the collimating lens realizes a collimating effect on the light emitted by the LED, the light beam emitted by the LED enters the light mixing module at an angle close to the vertical angle, the light loss caused by excessive reflection times of the light emitted by the LED is reduced, and the utilization rate of the light emitted by the LED is improved.

Further, still include the edge collimating lens, atomizing subassembly and the lens subassembly that set gradually on LED's the light-emitting direction, mix the light module and establish collimating lens with between the atomizing subassembly. The atomization assembly softens the light emitted by the light mixing module, and the atomization effect of the light is achieved.

Further, the gap width of the light mixing module is smaller than or equal to the width of a single LED.

Because the light beams emitted by the LEDs accord with Lambert distribution, the light emitted by the LEDs can be projected to the side wall of the light mixing module by controlling the width of the gap, so that the light emitted by the LEDs is reflected on the side wall, and the purpose of light mixing is achieved. When the gap of the light mixing module is narrower, more light can be projected to the side wall, so that the light emitted by the LED is mixed more fully. Meanwhile, the width of the gap can be reduced, so that the reflection stroke of the light emitted by the LED in the gap is shortened, and the reflection times of the light emitted by the LED in the gap are increased.

Furthermore, the ratio of the gap width of the light mixing module to the height of the light mixing module is between 1/8 and 1/3. The reflection stroke of the light energy emitted by the LED in the gap of the light mixing module is ensured, so that the reflection times of the light energy are ensured, and the light emitted by the LED can be more fully mixed in the light mixing module.

When the light emitted by the LED is reflected and mixed in the gap of the light mixing module, the reflection times are 2-5 times, so that the effects of light mixing, color mixing and uniform light spots are achieved. Through calculation, when the ratio of the gap width of the light mixing module to the height of the light mixing module is 1/3, the number of times of light reflection in the gap of the light mixing module can reach 2-3 times; when the ratio of the gap width of the light mixing module to the height of the light mixing module is 1/8, the number of times of light reflection in the gap of the light mixing module can reach more than 5 times. And when the difference between the gap width of the light mixing module and the height of the light mixing module is larger, the process difficulty is larger, and the cost is higher.

Furthermore, the side wall of the light mixing module forms a light reflecting surface, and the side wall of the light mixing module is roughened, so that the light beam is diffusely reflected on the side wall of the light mixing module. After coarsening treatment, the side wall of the light mixing module forms a fine and uniform concave-convex surface, so that light beams are subjected to diffuse reflection between the side walls of the light mixing module, different light beams are fully mixed, and finally the light beams are emitted from the emergent surface of the light mixing module to play a good light mixing role. The defects that the reflection angle is not enough divergent and the like caused by the fact that the reflection angle of the light beam is too uniform through a mirror surface with a smooth surface or a glass surface are overcome.

Furthermore, the LEDs are radially distributed from the center to the outside, and the light mixing component is cylindrical. The shape of the light mixing module is matched with the arrangement of the LEDs, so that the utilization rate of light emitted by the LEDs is improved.

Furthermore, the bottom surface or the top surface defined by the cylinders is provided with a fixing strip, the fixing strip is correspondingly positioned between the installation intervals of two adjacent LEDs, and the cylinders are fixedly connected through the fixing strip. The light mixing components are connected and fixed through the fixing strips to be integrated and fixed into the light mixing module. Because the volume of the fixing strip is small and the fixing strip is positioned between the installation positions of two adjacent LEDs, the light path emitted by the LEDs is not shielded.

Furthermore, comb-shaped fixing pieces are arranged on the bottom surface or the top surface defined by the cylinders, the comb-shaped fixing pieces are correspondingly arranged between the installation intervals of the two adjacent LEDs, the cylinders are fixedly connected through the comb-shaped fixing pieces, and comb teeth of the comb-shaped fixing pieces extend into the cylinders. The comb-shaped fixing piece fixes the light mixing component into the light mixing module, so that the light mixing module is convenient to install, and the comb-shaped structure is utilized to fix the light mixing component, so that the light mixing module is more stable. And the comb-shaped fixing piece is positioned between the installation intervals of two adjacent LEDs, so that the light path emitted by the LEDs is not shielded.

Compared with the prior art, the invention has the beneficial effects that:

According to the technical scheme, the light mixing module is arranged in the light emitting direction of the LED, so that at least part of light emitted by the LED is emitted after being mixed and subjected to color mixing through the light mixing module, and the beneficial effects of color mixing and light mixing uniformity are achieved. Compared with the traditional light mixing technology, the light mixing device has the advantages of uniform, simple and effective color mixing and cost saving.

Drawings

Fig. 1 is a disassembled three-dimensional structure diagram of the present invention.

Fig. 2 is a front view of the present invention after detachment.

Fig. 3 is a front view of the present invention after assembly.

Fig. 4 is a schematic diagram illustrating a state in which a light beam is reflected when passing through a gap of the light mixing module.

Fig. 5 is a view showing an arrangement state of LEDs.

Fig. 6 is a schematic structural diagram of the light mixing module.

Fig. 7 is a plan view of the fixing strip mounted on the light mixing module.

Detailed Description

The drawings are only for purposes of illustration and are not to be construed as limiting the invention. For a better understanding of the following embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.

Example 1

As shown in fig. 1 and 2, an LED light mixing system includes a plurality of LEDs 100 arranged in a certain pattern or shape and a PCB 110 for mounting the LEDs 100, a light mixing module 500 is arranged in a light emitting direction of the LEDs 100, a shape of a cross section of the light mixing module 500 matches with a shape formed by the arrangement of the LEDs 100, a gap for light emitted by the LEDs 100 to pass through is arranged on the light mixing module 500, and at least a part of light emitted by the LEDs 100 passes through the light mixing module 500 to be emitted after being reflected and mixed by a side wall of the gap.

In this technical scheme, mix optical module 500 and establish on LED 100's light-emitting direction, when the light beam that LED100 sent was through mixing optical module 500, a small part of light beam directly passed from mixing optical module 500's clearance directly, and the light of major part is certain angle and gets into mix optical module 500, throw in the lateral wall of mixing optical module 500 to go back and forth between the lateral wall of mixing optical module 500 and reflect the back emergence many times, it is even to realize mixing the light.

When the conventional LED is directly projected without passing through the light mixing module 500, the problem of high brightness in the middle of the light spot and low brightness around the light spot may occur, which affects the illumination effect. Compared with the light mixing method using an integrator and a light guide body, the light mixing module 500 of the technical scheme mixes light through diffuse reflection, and the light mixing effect is more uniform. For the light sources with a plurality of LEDs 100 arranged, the light guide or the integrator is arranged in one-to-one correspondence with the LEDs 100, and then light mixing is performed, so that dark regions are easily generated between adjacent LEDs 100, and the light mixing module 500 mixes light for the whole light source group, so that formed light spots are more uniform.

wherein the LED100 may be a single color, or may be a multi-color LED 100. After light emitted by the LED100 enters the light mixing module 500 and is reflected back and forth for multiple times, a light beam with uniform color mixing and no obvious color block in light spots is projected.

Wherein, the shape of the light mixing module 500 is designed according to the shape formed by the arrangement of the LEDs 100. Thereby enabling the light mixing module 500 to cover the LED100 and preventing the LED100 from leaking light. For example, when the LEDs 100 are arranged in a matrix, the light mixing module 500 is also designed in a matrix; when the LEDs 100 are arranged in a circular shape, the light mixing module 500 is also designed in a circular shape; when the LEDs 100 are arranged in a spiral shape, the light mixing module 500 is arranged in a spiral shape.

Further, the light mixing module 500 is composed of a plurality of light mixing components which are designed in an annular shape and have different sizes, the centers of the light mixing components are arranged on the same axis and are arranged from inside to outside according to the sizes, and gaps are reserved between the adjacent light mixing components. The light mixing assemblies are concentrically arranged, so that the gap between the two light mixing assemblies is annular, the width of the same annular gap is uniform, the light mixing degree of the LEDs in the same annular gap is consistent, and the light spot brightness is uniform.

Optionally, the widths of the annular gaps formed between the adjacent light mixing assemblies are equal, so that uniformity of formed light spots is consistent after the light emitted by the LEDs 100 is mixed in each corresponding circle of light mixing assemblies.

Optionally, the heights h of the light mixing assemblies are consistent, so that the reflection strokes of the light emitted by the LEDs in the gaps of the light mixing assemblies are consistent, and further, the color mixing is more uniform.

Optionally, the height of the light mixing component may also be set to different heights, and the heights are gradually increased from inside to outside, for example, the light mixing component is arranged in a step shape.

Wherein, a small part of the light emitted by the LED100 is directly emitted through the gap, and a large part of the light enters the light mixing component at a certain angle and is projected to the side wall of the light mixing component to be reflected back and forth for a plurality of times, so that the light is emitted after being mixed to form uniform light spots.

As shown in fig. 2, in a preferred embodiment of the present invention, a collimating lens 400 is disposed between the LED100 and the light mixing module 500, and the collimating lens 400 is closely attached to the LED 100. The light emitted by the LED100 enters the collimating lens 400 to the maximum, and the collimating lens 400 collimates the light emitted by the LED100, so that the light beam emitted by the LED100 enters the light mixing module 500 at an angle close to the vertical angle, thereby reducing the light loss caused by the excessive reflection times of the light emitted by the LED100, and improving the utilization rate of the light emitted by the LED 100.

The collimating lens 400 lens holder is fixedly mounted above the LED100 and is tightly attached to the LED100, and the light incident surface of the light mixing module 500 is tightly attached to the collimating lens 400. The collimating lens 400 includes a plurality of collimating units 410, and the collimating units 410 correspond to the LEDs one to one, so as to achieve a collimating effect on the LEDs 100 more precisely.

As shown in fig. 2 and fig. 3, in a preferred embodiment of the present invention, the LED module further includes a collimating lens 400, an atomizing assembly 600, and a lens assembly 700, which are sequentially disposed along a light emitting direction of the LED100, and the light mixing module 500 is disposed between the collimating lens 400 and the atomizing assembly 600. The atomization assembly 600 softens the light emitted by the light mixing module 500, and achieves the atomization effect of the light.

Wherein, atomizing subassembly 600 is by the atomizing leaf 610 of a plurality of vertical designs toward radially arranging by the center and constitutes, atomizing subassembly 600's center is equipped with a center section of thick bamboo 620, atomizing leaf 610 rotatably pivoted connect to on the center section of thick bamboo 620, the pin joint position of each atomizing leaf 610 and the quantity of atomizing leaf 610 can set up as required.

Optionally, the atomizing assembly 600 is a piece of atomizing sheet, or other assembly capable of softening the light emitted from the LED.

As shown in fig. 1, in this embodiment, the LED light mixing system further includes a high-power LED101 installed at the center of the PCB 110, and a pattern sheet 200 and a light reflecting module 300 arranged along the light emitting direction of the high-power LED101, wherein the light reflecting module 300 is fixedly installed above the high-power LED101 through a fixing bracket and closely attached to the high-power LED, and the pattern sheet 200 is installed between the high-power LED101 and the light reflecting module.

The light reflecting module 300 is designed as a cylinder and penetrates through the center of the collimating lens 400, the center of the light mixing module 500 and the center of the atomizing assembly 600.

Optionally, the reflective module 300 is a hollow light guide tube with a mirror surface inside, or a light guide body.

The light emitted by the high-power LED101 passes through the pattern sheet 200 and enters the reflective module 300 to project light spots with a plurality of patterns, and the light spots are combined with the light spots formed by the light path of the LED100 to realize the composite effect of the patterns and the dyeing.

The colors of the high-power LED101 and the LED100 are different, so that the pattern effect is more obvious.

As shown in fig. 4, in an embodiment, the gap width L of the light mixing module 500 is smaller than or equal to the width of a single LED 100.

Because the light beams emitted by the LEDs 100 conform to lambertian distribution, the width L of the gap is controlled, so that the light emitted by the LEDs 100 can be projected onto the sidewall of the light mixing module 500, and the light emitted by the LEDs 100 is reflected on the sidewall, thereby achieving the purpose of mixing light. When the gap of the light mixing module 500 is narrower, more light can be projected to the sidewall, so that the light emitted from the LED100 is more sufficiently mixed. Meanwhile, the width L of the gap can be reduced, the reflection stroke of the light emitted by the LED100 in the gap can be shortened, and the reflection times of the light emitted by the LED100 in the gap can be increased.

In a preferred embodiment of the present invention, a ratio between the gap width L of the light mixing module 500 and the height h of the light mixing module 500 is between 1/8 and 1/3. The reflection stroke of the light emitted by the LED100 in the gap of the light mixing module 500 is ensured, so that the reflection times are ensured, and the light emitted by the LED100 can be more fully mixed in the light mixing module 500.

When the light emitted by the LED100 is reflected and mixed in the gap of the light mixing module 500, the reflection times are 2-5 times enough to achieve the effects of mixing and mixing the light and making the light spots uniform. Through calculation, when the ratio of the gap width L of the light mixing module 500 to the height h of the light mixing module 500 is 1/3, the number of times of light reflection in the gap of the light mixing module 500 can reach 2-3 times; when the ratio of the gap width L of the light mixing module 500 to the height h of the light mixing module 500 is 1/8, the number of times of light reflection in the gap of the light mixing module 500 can reach 5 or more. And when the difference between the gap width L of the light mixing module 500 and the height h of the light mixing module 500 is larger, the process difficulty is larger, and the cost is higher.

In a preferred embodiment of the present invention, the side wall of the light mixing module 500 forms a light reflecting surface, and the side wall of the light mixing module 500 is roughened, so that the light beam is diffusely reflected on the side wall of the light mixing module 500.

Preferably, the cylinder 510 is made of metal, and the light mixing module 500 made of metal has good heat dissipation performance, strong plasticity, and is easy to bend. The side wall of the cylinder 510 forms a light reflecting surface, and the side wall of the light mixing module 500 is treated by spraying matte paint or frosted to realize the effect of diffuse reflection.

After coarsening treatment, the side wall of the light mixing module 500 forms a fine and uniform concave-convex surface, so that light beams are diffusely reflected between the side walls of the light mixing module 500, are fully mixed by different light beams, and are emitted from the emergent surface of the light mixing module 500 to play a good light mixing role. The defects that the reflection angle is not enough divergent and the like caused by the fact that the reflection angle of the light beam is too uniform through a mirror surface with a smooth surface or a glass surface are overcome.

Optionally, the cylinder 510 may be made of other materials, such as single-sided glass, and the surface of the single-sided glass is roughened to obtain fine and uniform concave-convex feeling, so as to achieve the effect of diffuse reflection of light beams.

As shown in fig. 5 and 6, in the preferred embodiment of the present invention, the LEDs 100 are radially distributed from the center to the outside, and the light mixing assembly is in the shape of a cylinder 510. The shape of the light mixing module 500 is matched with the arrangement of the LEDs 100, so that the light emitted by the LEDs 100 enters the light mixing module 500 as completely as possible, and the utilization rate of the light emitted by the LEDs 100 is improved.

The light mixing module 500 is composed of a plurality of cylinders 510 with different radii, the centers of the cylinders 510 are on the same axis, the radii of the cylinders 510 are gradually enlarged from inside to outside, and a gap is left between adjacent cylinders 510.

As shown in fig. 7, in a preferred embodiment of the present invention, a fixing strip 800 is disposed on a bottom surface or a top surface surrounded by the plurality of cylinders 510, the fixing strip 800 is correspondingly located between the mounting positions of two adjacent LEDs 100, and the cylinders 510 are connected and fixed by the fixing strip 800.

The light mixing components are connected and fixed by the fixing strip 800 to form a whole and fixed into the light mixing module 500. Because the fixing strip 800 has a small volume and is located between the installation positions of two adjacent LEDs 100, the light path emitted by the LEDs 100 is not blocked.

Wherein, the fixing strip 800 can be fixedly connected with the cylinder 510 by welding or gluing.

Example 2

The difference between this embodiment and embodiment 1 is that the fixing strip 800 is a comb-shaped fixing member, the cylinders 510 are connected and fixed by the comb-shaped fixing member, and the comb teeth of the comb-shaped fixing member extend into the cylinders 510.

The comb-shaped fixing member fixes the light mixing component into the light mixing module 500, which is convenient for installation. The comb tooth interval of comb type mounting is slightly less than or equal to the lateral wall thickness of drum for comb type structure is right mix the optical subassembly and carry out the chucking, and then make it is more firm to mix optical module 500. And the comb-shaped fixing piece is positioned between the installation intervals of two adjacent LEDs 100, so that the light path emitted by the LEDs 100 is not blocked.

Preferably, the pair of comb fixtures is between the mounting positions of two adjacent LEDs 100.

It should be understood that the above-mentioned embodiments of the present invention are only examples for clearly illustrating the technical solutions of the present invention, and are not intended to limit the specific embodiments of the present invention. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention claims should be included in the protection scope of the present invention claims.

Claims (10)

1. The utility model provides a LED mixes optical system, its characterized in that, including a plurality of LEDs that are certain pattern or shape and arrange and the PCB board that is used for installing LED, be equipped with one in LED's the light-emitting direction and mix the optical module, mix the shape of optical module cross section and the shape phase-match that LED arranged and formed, just mix the optical module and be equipped with the confession the clearance that the light that LED sent passed, the light that LED sent is at least partly passed through mix the optical module and form the lateral wall reflection in clearance is emergent after mixing light.

2. The LED light mixing system according to claim 1, wherein the light mixing module comprises a plurality of light mixing components with different sizes and ring-shaped designs, the centers of the light mixing components are arranged on the same axis from inside to outside according to the sizes from small to large, and a gap is left between adjacent light mixing components.

3. The LED light mixing system of claim 1, wherein a collimating lens is disposed between the LED and the light mixing module, and the collimating lens is closely attached to the LED.

4. The LED light mixing system according to claim 1, further comprising a collimating lens, an atomizing component and a lens component sequentially arranged along a light emitting direction of the LED, wherein the light mixing module is arranged between the collimating lens and the atomizing component.

5. The LED light mixing system of claim 1, wherein the gap width of the light mixing module is smaller than or equal to the width of a single LED.

6. The LED light mixing system of claim 1, wherein a ratio of a gap width of the light mixing module to a height of the light mixing module is between 1/8 and 1/3.

7. The LED light mixing system of claim 1, wherein the side wall of the light mixing module forms a reflection surface of the light beam, and the side wall of the light mixing module is roughened, so that the light beam is diffusely reflected by the side wall of the light mixing module.

8. The LED mixing system of claim 2, wherein the LEDs are radially distributed from the center to the outside, and the mixing element is cylindrical.

9. The LED light mixing system according to claim 8, wherein fixing strips are arranged on the bottom surface and/or the top surface surrounded by the plurality of cylinders, the fixing strips are correspondingly positioned between the installation positions of any two adjacent LEDs, and the cylinders are connected and fixed through the fixing strips.

10. The LED light mixing system according to claim 8, wherein the bottom surface and/or the top surface surrounded by the plurality of cylinders are provided with comb-shaped fixing members, the cylinders are connected and fixed by the comb-shaped fixing members, and comb teeth of the comb-shaped fixing members extend into the cylinders.