阅读说明：本技术 一种可切换颜色的光源及其制备方法 (Light source capable of switching colors and preparation method thereof ) 是由 张腾飞 于 2021-06-21 设计创作，主要内容包括：本发明公开了一种可切换颜色的光源及其制备方法。其中,可切换颜色的光源包括光源,光源用于出射光束；滤光装置,滤光装置位于光束的传播路径上；光源包括第一颜色光源和第二颜色光源,第一颜色光源用于出射第一颜色光,第二颜色光源用于出射第二颜色光；滤光装置包括第一滤光区域和第二滤光区域,第一滤光区域用于通过第一颜色光,第二滤光区域用于通过第二颜色光；第一颜色光和第二颜色光为互补色光。本发明提供的可切换颜色的光源及其制备方法,利用互补色原理,使得可切换颜色的光源发出的第一颜色光仅能从第一滤光区域出射；发出的第二颜色光仅能从第二滤光区域出射,从而实现发光区域边界锐利、亮度均匀、发光面连续的可切换颜色的光源。(The invention discloses a light source capable of switching colors and a preparation method thereof. Wherein the color switchable light source comprises a light source for emitting a light beam; the filtering device is positioned on the propagation path of the light beam; the light source comprises a first color light source and a second color light source, wherein the first color light source is used for emitting first color light, and the second color light source is used for emitting second color light; the light filtering device comprises a first light filtering area and a second light filtering area, wherein the first light filtering area is used for allowing the first color light to pass through, and the second light filtering area is used for allowing the second color light to pass through; the first color light and the second color light are complementary color light. According to the light source capable of switching colors and the preparation method thereof, provided by the invention, the first color light emitted by the light source capable of switching colors can only be emitted from the first light filtering area by utilizing a complementary color principle; the emitted second color light can only be emitted from the second filter region, so that the light source which has sharp boundary of the light emitting region, uniform brightness and continuous light emitting surface and can switch colors is realized.)

1. A switchable color light source, comprising:

a light source for emitting a light beam;

a filter device located in a propagation path of the light beam;

the light sources comprise a first color light source and a second color light source, the first color light source is used for emitting first color light, and the second color light source is used for emitting second color light;

the light filtering device comprises a first light filtering area and a second light filtering area, wherein the first light filtering area is used for allowing a first color light to pass through, and the second light filtering area is used for allowing a second color light to pass through;

the first color light and the second color light are complementary color light.

2. A color switchable light source according to claim 1,

the first color light source is arranged corresponding to the first filter area, and the second color light source is arranged corresponding to the second filter area.

3. A color switchable light source according to claim 1,

the first color light is green light, and the second color light is red light;

or the first color light is yellow light, and the second color light is purple light;

or the first color light is orange light, and the second color light is blue light.

4. A color switchable light source according to claim 1,

the light filtering device comprises an integrally formed light diffusing plate comprising a first diffusing portion and a second diffusing portion;

the first diffusion subsection being located at the first filtered region, the first diffusion subsection being for passing a first color light;

the second diffusion subsection is located at the second light filtering region, and the second diffusion subsection is used for passing second color light.

5. A color switchable light source according to claim 1,

the light filtering device comprises a transmission substrate and a light filtering film arranged on one side of the transmission substrate;

the filter films comprise a first color filter film and a second color filter film, the first color filter film is positioned in the first filter area, and the second color filter film is positioned in the second filter area;

alternatively, the first and second electrodes may be,

the light filtering device comprises a transmission substrate and a light filtering coating arranged on one side of the transmission substrate;

the filter coating comprises a first color filter coating and a second color filter coating, the first color filter coating is located in the first filter area, and the second color filter coating is located in the second filter area.

6. A color switchable light source according to claim 5,

the transmissive substrate includes a light diffusion plate or a transparent substrate.

7. A color switchable light source according to claim 1,

the first filter regions and the second filter regions are alternately arranged in a first direction, wherein the first direction intersects with a propagation direction of the light beam.

8. A switchable color light source as claimed in claim 7,

the first filter regions and the second filter regions are alternately arranged along a second direction, wherein the second direction intersects with the first direction.

9. A color switchable light source according to claim 1,

the light emitting surface of the light filtering device is a plane or a curved surface.

10. A method of making a color switchable light source, comprising:

preparing a light source for emitting a light beam, the light source comprising a first color light source for emitting a first color light and a second color light source for emitting a second color light;

preparing a light filtering device, wherein the light filtering device comprises a first light filtering area and a second light filtering area, the first light filtering area is used for allowing a first color light to pass, the second light filtering area is used for allowing a second color light to pass, and the first color light and the second color light are complementary light;

the filter device is arranged on the propagation path of the light beam.

Technical Field

The embodiment of the invention relates to the technical field of machine vision, in particular to a light source capable of switching colors and a preparation method thereof.

Background

At present, in the technical fields of machine vision industry, illumination and the like, a multi-region multi-color switching light source is often needed, and although the existing light source realizes that a plurality of regions independently emit light with different colors, the existing multi-color light sources have two defects: 1. the transition of the boundary of each light-emitting area is fuzzy, namely, the brightness of the boundary part of each light-emitting area is continuously reduced and uneven, and under the illumination, the acquired picture increases the algorithm processing difficulty; 2. in order to make the boundary sharp, a physical barrier is directly added at the boundary of each light-emitting area, so that the transition of the boundary of each light-emitting area is sharp, but the boundary of each area is discontinuous because the physical barrier does not emit light, so that the corresponding transition areas among the light-emitting areas are not illuminated, and the image appears black, which also causes the effect of the shot picture to be greatly reduced.

Disclosure of Invention

The invention provides a light source capable of switching colors and a preparation method thereof, which are used for realizing the light source capable of switching the light emitting colors, and having a sharp boundary of a light emitting area and a continuous light emitting surface.

In a first aspect, an embodiment of the present invention provides a light source capable of switching colors, including:

a light source for emitting a light beam;

a filter device located in a propagation path of the light beam;

the light sources comprise a first color light source and a second color light source, the first color light source is used for emitting first color light, and the second color light source is used for emitting second color light;

the light filtering device comprises a first light filtering area and a second light filtering area, wherein the first light filtering area is used for allowing a first color light to pass through, and the second light filtering area is used for allowing a second color light to pass through;

the first color light and the second color light are complementary color light.

Optionally, the first color light source is disposed corresponding to the first filter region, and the second color light source is disposed corresponding to the second filter region.

Optionally, the first color light is green light, and the second color light is red light;

or the first color light is yellow light, and the second color light is purple light;

or the first color light is orange light, and the second color light is blue light.

Optionally, the light filtering means comprises an integrally formed light diffusing plate comprising a first diffusing portion and a second diffusing portion;

the first diffusion subsection being located at the first filtered region, the first diffusion subsection being for passing a first color light;

the second diffusion subsection is located at the second light filtering region, and the second diffusion subsection is used for passing second color light.

Optionally, the filtering device includes a transmission substrate and a filter film disposed on one side of the transmission substrate;

the filter films comprise a first color filter film and a second color filter film, the first color filter film is positioned in the first filter area, and the second color filter film is positioned in the second filter area;

alternatively, the first and second electrodes may be,

the light filtering device comprises a transmission substrate and a light filtering coating arranged on one side of the transmission substrate;

the filter coating comprises a first color filter coating and a second color filter coating, the first color filter coating is located in the first filter area, and the second color filter coating is located in the second filter area.

Optionally, the transmissive substrate includes a light diffusion plate or a transparent substrate.

Optionally, the first filter regions and the second filter regions are alternately arranged along a first direction, wherein the first direction intersects with a propagation direction of the light beam.

Optionally, the first filtering regions and the second filtering regions are alternately arranged along a second direction, wherein the second direction intersects with the first direction.

Optionally, the light emitting surface of the light filtering device is a plane or a curved surface.

In a second aspect, an embodiment of the present invention further provides a method for manufacturing a light source with switchable colors, where the method includes:

preparing a light source for emitting a light beam, the light source comprising a first color light source for emitting a first color light and a second color light source for emitting a second color light;

preparing a light filtering device, wherein the light filtering device comprises a first light filtering area and a second light filtering area, the first light filtering area is used for allowing a first color light to pass, the second light filtering area is used for allowing a second color light to pass, and the first color light and the second color light are complementary light;

the filter device is arranged on the propagation path of the light beam.

The light source comprises a first color light source and a second color light source, and the filter device positioned on the light emitting side of the light source comprises a first filter area and a second filter area, wherein the first filter area is used for allowing the first color light to pass through, the second filter area is used for allowing the second color light to pass through, and the first color light and the second color light are complementary light, so that when the light source capable of switching colors emits the first color light, the first color light source is turned on, the second color light source is turned off, the first color light can not pass through the second filter area at all and can only emit from the first filter area, and the first filter area can emit the first color light; when the light source of changeable colour sends second colour light, the second colour light source is opened, first colour light source is closed, second colour light can not pass through first filtering region completely, only can follow the emergence of second filtering region, thereby realize that second filtering region sends second colour light, the light source luminous zone's of this changeable colour boundary is sharp, luminance is even, simultaneously, need not to add the physics separation, make the boundary of first filtering region and second filtering region continuous, thereby make the material region homoenergetic that the light source of changeable colour corresponds receive illumination, reduce the risk of missed measure.

Drawings

Fig. 1 is a schematic structural diagram of a light source capable of switching colors according to an embodiment of the present invention;

fig. 2 is a schematic diagram illustrating that a light source capable of switching colors emits a first color light according to an embodiment of the present invention;

fig. 3 is a schematic diagram of a light source capable of switching colors and emitting a second color light according to an embodiment of the present invention;

FIG. 4 is a color wheel diagram according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a light filtering apparatus according to an embodiment of the present invention;

FIG. 6 is a schematic structural diagram of another optical filtering apparatus according to an embodiment of the present invention;

FIG. 7 is a schematic structural diagram of another optical filtering apparatus according to an embodiment of the present invention;

fig. 8 is a schematic structural diagram of another color-switchable light source according to an embodiment of the present invention;

fig. 9 is a schematic structural diagram of a light source capable of switching colors according to another embodiment of the present invention;

fig. 10 is a schematic perspective view of a color switchable light source according to an embodiment of the present invention;

fig. 11 is a flowchart illustrating a method for manufacturing a light source capable of switching colors according to an embodiment of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

Fig. 1 is a schematic structural diagram of a color-switchable light source according to an embodiment of the present invention, fig. 2 is a schematic structural diagram of a color-switchable light source according to an embodiment of the present invention when emitting a first color light, and fig. 3 is a schematic structural diagram of a color-switchable light source according to an embodiment of the present invention when emitting a second color light, as shown in fig. 1 to 3, the color-switchable light source according to an embodiment of the present invention includes:

a light source 10, the light source 10 for emitting a light beam.

And the filter device 11, wherein the filter device 11 is positioned on the propagation path of the light beam.

The light source 10 includes a first color light source 101 and a second color light source 102, the first color light source 101 is used for emitting a first color light 21, and the second color light source 102 is used for emitting a second color light 22. The filter device 11 includes a first filter region 111 and a second filter region 112, the first filter region 111 is used for passing the first color light 21, the second filter region 112 is used for passing the second color light 22, and the first color light 21 and the second color light 22 are complementary light.

For example, as shown in fig. 1-3, the light source 10 may include a plurality of circuit boards and a plurality of LED lamp beads, the plurality of LED lamp beads are arranged on the circuit boards in an array, the circuit boards may be PCB boards, and the PCB boards cooperate with a power supply to drive the LED lamp beads to emit light.

With continued reference to fig. 1-3, the light source 10 includes a first color light source 101 and a second color light source 102, the first color light source 101 is configured to emit a first color light 21, the second color light source 102 is configured to emit a second color light 22, and the first color light 21 and the second color light 22 are complementary light. For example, the first color light source 101 may employ an LED lamp bead emitting a first color light 21, and the second color light source 102 may employ an LED lamp bead emitting a second color light 22, in other embodiments, the first color light source 101 and the second color light source 102 may also employ a dual-color LED lamp bead capable of emitting both the first color light 21 and the second color light 22, which is not limited in this embodiment of the present invention.

The complementary color light means that the first color light 21 and the second color light 22 can form white light after being added, and the complementary color light can form a mutual blocking effect.

With continued reference to fig. 1-3, the light filtering means 11 is located at the light emitting side of the light source 10, the light filtering means 11 comprises a first light filtering region 111 and a second light filtering region 112, the first light filtering region 111 is used for passing the first color light 21, i.e. the first light filtering region 111 is used for filtering out the light except the first color light 21, and the second light filtering region 112 is used for passing the second color light 22, i.e. the second light filtering region 112 is used for filtering out the light except the second color light 22.

As shown in fig. 2, when the light source capable of switching colors emits the first color light 21, the first color light source 101 is turned on, the second color light source 102 is turned off, and since the first color light 21 and the second color light 22 are complementary light, the first color light 21 cannot pass through the second filter region 112 at all, and at this time, the first color light 21 only exits from the first filter region 111, so that the first filter region 111 emits the first color light 21, and the boundary of the light emitting region is sharp and the brightness is uniform. Similarly, when the light source capable of switching colors emits the second color light 22, the second color light source 102 is turned on, the first color light source 101 is turned off, and the second color light 22 cannot pass through the first filter region 111 at all because the first color light 21 and the second color light 22 are complementary color lights, at this time, the second color light 22 only exits from the second filter region 112, so that the second color light 22 is emitted from the second filter region 112, and the boundary of the light-emitting region is sharp and the brightness is uniform. Meanwhile, the light source with switchable colors does not need to be added with physical barriers, so that the boundaries of the first filtering area 111 and the second filtering area 112 are continuous, and when the light source with switchable colors is used for workpiece detection, the material area corresponding to the light source with switchable colors can be illuminated, and the risk of missed detection is reduced.

The light source with switchable colors provided by the embodiment of the present invention is configured that the light source 10 includes a first color light source 101 and a second color light source 102, and the filter device 11 located at the light emitting side of the light source 10 includes a first filter region 111 and a second filter region 112, the first filter region 111 is used for passing the first color light 21, the second filter region 112 is used for passing the second color light 22, and the first color light 21 and the second color light 22 are complementary light, so that when the light source with switchable colors emits the first color light 21, the first color light source 101 is turned on, the second color light source 102 is turned off, the first color light 21 cannot pass the second filter region 112 at all, and can only emit from the first filter region 111, thereby realizing that the first filter region 111 emits the first color light 21; when the light source capable of switching colors emits the second color light 22, the second color light source 102 is turned on, the first color light source 101 is turned off, the second color light 22 can not pass through the first filtering area 111 at all and can only be emitted from the second filtering area 112, so that the second filtering area 112 can emit the second color light 22, the boundary of the light emitting area of the light source capable of switching colors is sharp, the brightness is uniform, meanwhile, physical separation is not required to be added, the boundary of the first filtering area 111 and the second filtering area 112 is continuous, the material area corresponding to the light source capable of switching colors can be illuminated, and the risk of missed detection is reduced.

With continued reference to fig. 1-3, optionally, the first color light sources 101 are disposed in correspondence with the first filter region 111 and the second color light sources 102 are disposed in correspondence with the second filter region 112.

Specifically, as shown in fig. 1 to 3, in the present embodiment, the first color light source 101 is disposed corresponding to the first light filtering region 111, so that most of the first color light 21 emitted by the first color light source 101 is emitted through the first light filtering region 111, and the first color light 21 filtered by the second light filtering region 112 is reduced, thereby improving the utilization rate of the first color light 21. Similarly, by arranging the second color light source 102 and the second light filtering area 112 correspondingly, most of the second color light 22 emitted by the second color light source 102 is emitted through the second light filtering area 112, the second color light 22 filtered by the first color light source 101 is reduced, and thus the utilization rate of the second color light 22 is improved.

It should be noted that, the arrangement of the first color light source 101 corresponding to the first filter region 111 means that the first color light source 101 at least partially overlaps the first filter region 111 along the emitting direction of the first color light 21, and optionally, the first color light source 101 is located in the first filter region 111 along the emitting direction of the first color light 21, thereby contributing to further improving the utilization rate of the first color light 21. Similarly, the second color light source 102 and the second light filtering region 112 are correspondingly disposed, that is, along the emitting direction of the second color light 22, the second color light source 102 and the second light filtering region 112 are at least partially overlapped, and optionally, along the emitting direction of the second color light 22, the second color light source 102 is located in the second light filtering region 112, thereby contributing to further improving the utilization rate of the second color light 22.

Optionally, the first color light 21 is green light, and the second color light 22 is red light; alternatively, the first color light 21 is yellow light, and the second color light 22 is violet light; alternatively, the first color light 21 is orange light and the second color light 22 is blue light.

Specifically, fig. 4 is a color wheel diagram according to an embodiment of the present invention, and as shown in fig. 4, two end points of the diameter of the color wheel can be formed into white or gray after being superimposed, that is, the two end points of the diameter of the color wheel are complementary colors. In the present embodiment, the first color light 21 is green light, and the second color light 22 is red light; alternatively, the first color light 21 is yellow light, and the second color light 22 is violet light; or, the first color light 21 is orange light, the second color light 22 is blue light, and the first color light 21 and the second color light 22 are complementary light, so that when the light source capable of switching colors emits the first color light 21, the first color light 21 cannot pass through the second filtering region 112 at all, and can only exit from the first filtering region 111, so that the first filtering region 111 emits the first color light 21; when the light source capable of switching colors emits the second color light 22, the second color light 22 can not pass through the first filter region 111 at all, and can only be emitted from the second filter region 112, so that the second filter region 112 emits the second color light 22, and the light emitting region has a sharp boundary and uniform brightness.

It should be noted that the first color light 21 and the second color light 22 are not limited to the above color light combination, and in other embodiments, a person skilled in the art may set the first color light 21 and the second color light 22 according to actual needs, as shown in fig. 4, for example, the first color light 21 may be orange light, the second color light 22 may be blue-violet light, etc., as long as the first color light 21 and the second color light 22 are complementary light, which is not limited in the embodiment of the present invention.

Fig. 5 is a schematic structural diagram of a light filtering device according to an embodiment of the present invention, as shown in fig. 5, optionally, the light filtering device 11 includes an integrally formed light diffusion plate 31, the light diffusion plate 31 includes a first diffusion section 311 and a second diffusion section 312, the first diffusion section 311 is located in the first light filtering region 111, the first diffusion section 311 is used for passing through the first color light 21, the second diffusion section 311 is located in the second light filtering region 112, and the second diffusion section 311 is used for passing through the second color light 22.

As shown in fig. 5, the optical filter 11 includes an integrally formed light diffusion plate 31, the light diffusion plate 31 includes a first diffusion section 311 located in the first filter region 111 and a second diffusion section 312 located in the second filter region 112, the first diffusion section 311 is used for passing the first color light 21, and the second diffusion section 311 is used for passing the second color light 22.

Fig. 6 is a schematic structural diagram of another filtering apparatus according to an embodiment of the invention, as shown in fig. 6, optionally, the filtering apparatus 11 includes a transmissive substrate 41 and a filter 42 disposed on one side of the transmissive substrate 41, the filter 42 includes a first color filter 421 and a second color filter 422, the first color filter 421 is located in the first filtering region 111, and the second color filter 422 is located in the second filtering region 112.

As shown in fig. 6, in the present embodiment, the first color filter 421 for passing the first color light 21 and the second color filter 422 for passing the second color light 22 are attached to one side of the transmission substrate 41, the first color filter 421 is located in the first filter region 111, and the second color filter 422 is located in the second filter region 112, so that the filtering function is realized, and meanwhile, the production process is simple, the cost is low, and the implementation is easy.

Fig. 7 is a schematic structural diagram of another filtering apparatus according to an embodiment of the present invention, as shown in fig. 7, optionally, the filtering apparatus 11 includes a transmissive substrate 41 and a filtering coating 43 disposed on one side of the transmissive substrate 41, where the filtering coating 43 includes a first color filtering coating 431 and a second color filtering coating 432, the first color filtering coating 431 is located in the first filtering region 111, and the second color filtering coating 432 is located in the second filtering region 112.

As shown in fig. 7, in the present embodiment, a first color filter coating 431 for passing the first color light 21 and a second color filter coating 432 for passing the second color light 22 are coated on one side of the transmission substrate 41, and the first color filter coating 431 is located in the first filter region 111, and the second color filter coating 432 is located in the second filter region 112, so that the filtering function is realized, and meanwhile, the production process is simple, the cost is low, and the implementation is easy.

Alternatively, the transmissive substrate 41 includes a light diffusion plate or a transparent substrate.

The light diffusion plate may be composed of a transparent base material and a plurality of particles dispersed in the base material, the particles dispersed in the base material may cause diffuse transmission of light incident on the light diffusion plate due to a difference in optical refractive index with respect to a wavelength in a visible light region from the base material, and the light emission luminance of the color-switchable light source may be made uniform by providing the transmission substrate 41 with the light diffusion plate.

In other embodiments, the transmissive substrate 41 may also be a transparent substrate to reduce the attenuation of light and improve the utilization of light, thereby improving the illumination brightness of the light source with switchable colors.

Fig. 8 is a schematic structural diagram of another color-switchable light source according to an embodiment of the present invention, as shown in fig. 1-3 and fig. 8, optionally, the first filter regions 111 and the second filter regions 112 are alternately arranged along a first direction X, where the first direction X intersects with the propagation direction Y of the light beam.

Specifically, as shown in fig. 1 to 3 and 8, the first filter regions 111 and the second filter regions 112 are arranged alternately in the first direction X to improve the uniformity of the illumination area of the first color light 21 and the illumination area of the second color light 22, thereby contributing to an improvement in the illumination effect.

The first direction X may be set according to actual requirements, for example, the first direction X is perpendicular to a propagation direction Y of the light beam, where the propagation direction Y of the light beam is an illumination direction of the light source capable of switching colors, which is not limited in the embodiment of the present invention.

Fig. 9 is a schematic structural diagram of another light source capable of switching colors according to an embodiment of the present invention, and fig. 10 is a schematic structural diagram of a three-dimensional light source capable of switching colors according to an embodiment of the present invention, as shown in fig. 9 and fig. 10, optionally, the first filter regions 111 and the second filter regions 112 are alternately arranged along a second direction Z, where the second direction Z intersects with the first direction X.

Specifically, as shown in fig. 9 and 10, by providing the first filter regions 111 and the second filter regions 112 to be alternately arranged along the second direction Z, the uniformity of the illumination area of the first color light 21 and the illumination area of the second color light 22 can be further improved, thereby further improving the illumination effect.

The second direction Z may be set according to actual requirements, for example, the second direction Z is perpendicular to the first direction X, which is not limited in the embodiment of the present invention.

With continued reference to fig. 8-10, optionally, the light emitting surface of the filter means 11 is planar or curved.

Wherein, filter 11's light emitting area can set up to plane or curved surface to the light source suitability that makes changeable colour is strong, can wide application in the light source that the light emitting area is plane or curved surface, for example multi-angle bar light source, multizone area source, multi-angle annular light source, the coaxial light source of multizone, multi-angle arch light source and multi-angle ball integral light source etc..

It should be noted that, those skilled in the art may also set other functional modules of the light source capable of switching colors according to actual requirements, for example, a heat dissipation device is set near the light source 10, and the heat dissipation device may employ one or more heat dissipation fans, which is not limited in this embodiment of the present invention.

The light source with switchable colors provided by the embodiment of the present invention is configured that the light source 10 includes the first color light source 101 and the second color light source 102, and the filter device 11 located at the light emitting side of the light source 10 includes the first filter region 111 and the second filter region 112, the first filter region 111 is used for passing the first color light 21, the second filter region 112 is used for passing the second color light 22, the first color light 21 and the second color light 22 are complementary colors, and by using the complementary color principle, when the light source with switchable colors emits the first color light 21, the first color light 21 cannot pass the second filter region 112 at all, and can only be emitted from the first filter region 111; when the light source capable of switching colors emits the second color light 22, the second color light 22 cannot pass through the first filter region 111 at all, and can only be emitted from the second filter region 112, so that the first color light 21 and the second color light 22 are switched. The light source with the color switchable has the advantages that the light emitting areas which are independently controlled are realized, the light emitting areas are in seamless connection, the boundary transition of the light emitting areas is sharp, and the light source is suitable for multi-angle defect detection of a high-reflection surface.

Based on the same inventive concept, an embodiment of the present invention further provides a method for manufacturing a light source capable of color switching, which is used to manufacture a light source capable of color switching provided by the above embodiment, and the same or corresponding structures and terms as those in the above embodiment are not repeated herein, and fig. 11 is a schematic flow chart of the method for manufacturing a light source capable of color switching provided by the embodiment of the present invention, as shown in fig. 11, the method includes the following steps:

step 110, preparing a light source, where the light source is used to emit a light beam, the light source includes a first color light source and a second color light source, the first color light source is used to emit a first color light, and the second color light source is used to emit a second color light.

The light source can comprise a plurality of circuit boards and a plurality of LED lamp beads, the LED lamp bead arrays are arranged on the circuit boards, the circuit boards can be PCB boards, and the PCB boards are matched with a power supply and used for driving the LED lamp beads to emit light. The first color light source may adopt an LED lamp bead emitting a first color light, the second color light source may adopt an LED lamp bead emitting a second color light, in other embodiments, the first color light source and the second color light source may also adopt a two-color lamp bead capable of emitting the first color light and the second color light at the same time, which is not limited in the embodiments of the present invention.

Step 120, preparing a filtering device, where the filtering device includes a first filtering area and a second filtering area, the first filtering area is used for passing a first color light, the second filtering area is used for passing a second color light, and the first color light and the second color light are complementary colors.

The first filter region is used for filtering out light except the first color light, and the second filter region is used for filtering out light except the second color light.

Step 130, disposing the filter device on the propagation path of the light beam.

The light filtering device is arranged on the light emitting side of the light source, the first color light and the second color light are complementary color light, so that a mutual blocking effect can be formed, when the light source with the switchable colors emits the first color light, the first color light can not pass through the second light filtering area completely, at the moment, the first color light is only emitted from the first light filtering area, the first light filtering area emits the first color light, the boundary of the light emitting area is sharp, and the brightness is uniform. Similarly, when the light source capable of switching colors emits the second color light, the second color light can not pass through the first filter region completely, and at the moment, the second color light only exits from the second filter region, so that the second filter region emits the second color light, and the boundary of the light emitting region is sharp and the brightness is uniform. Meanwhile, the light source capable of switching colors is free from physical separation, so that the boundary of the first filtering area and the second filtering area is continuous, the material area corresponding to the light source capable of switching colors can be illuminated, and the risk of missing detection is reduced.

It should be noted that the order of step 110 and step 120 is not limited, in other embodiments, step 120 may be performed first and then step 110 is performed, in other embodiments, step 110 and step 120 may also be performed simultaneously, and those skilled in the art may set the order according to actual requirements.

It should be noted that before step 110 and step 120, the light source with switchable color can also be designed.

Illustratively, designing a light source of switchable color comprises:

first, the project situation is defined, and the design requirement of the light source with switchable color is defined.

Among the design requirements for the switchable colors are the apparent size of the switchable colors, power, total size of the light emitting surface and the total number of light emitting areas N (N >1), the shape, length, width, radius, area of each light emitting area, etc.

And designing a light source capable of switching colors.

Wherein designing the light source of switchable color may comprise:

the arrangement and the channel number of the LED lamp beads in the light source with switchable colors are designed to realize N light-emitting areas.

Each light emitting area on the light emitting face of the color switchable light source is designed.

The light emitting surface of the light source with switchable colors is divided and the distribution of complementary colors is planned, so that the purposes of sharp boundary of the light emitting area and continuous light emitting surface are achieved.

Designing other parts such as a light source structure, appearance, heat dissipation and the like capable of switching colors.

And thirdly, processing and manufacturing the light source with switchable colors.

Wherein, the processing and manufacturing of the light source with switchable color are the above steps 110 to 130.

Exemplary processing and fabrication of the switchable color light source may further include:

and completing processes of welding lamp beads according to a drawing, pasting a filter film with complementary colors on the surface of the transmission substrate to form a filter device, assembling a light source structure with switchable colors and the like.

In other embodiments, the light filtering device may also be a light emitting plate with complementary colors formed by direct machining or a light emitting plate with complementary colors sprayed on, and those skilled in the art can set the light filtering device according to actual needs.

It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.