A high uniformity transmissive wavelength conversion device and light source architecture
Patent Information
- Application Number
- CN202522070698.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-26
- Publication Date
- 2026-10-30
- Estimated Expiration
- 2035-09-26
AI Technical Summary
该光源架构中，分光/合光元件采用对蓝光进行按比例镀膜的方式，进行蓝光分光，或，采用区域镀膜的方式，对蓝光进行分光，即，蓝光和黄光靠二向色镜的镀膜来实现第一蓝光和第二蓝光按比例的分配，光源的色温一致性对二向色镜镀膜依赖性太大，很容易出现生产的一批光源里色温一致性差异较大，而舞台灯光柱恰恰对色温一致性要求较高(±150K)
[0018]1、本申请提供一种了高一致性透射式波长转换装置，将由光学镀膜光谱控制的色温一致性，转换成由结构尺寸来进行控制，这种转变，可是使得色温一致性得到很大的提高，同时，提高了动态波长转换光源的可靠性问题。
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Figure CN224920254U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a light source architecture, and in particular to a highly consistent transmissive wavelength conversion device and light source architecture. Background Technology
[0002] Currently, stage lighting sources are in a transitional phase from traditional to new light sources, with rapid technological iteration. Driven by policy, LED and laser light sources have become the mainstream development directions. However, LED light sources are limited in many applications due to their short illumination distance, while tri-color lasers are not widely accepted by the market due to high cost, speckle, and potential laser hazards.
[0003] Laser fluorescent white light source modules hold a significant advantage in industries such as stage lighting and beam lighting due to their low cost, high collimation, and long-distance illumination. Laser fluorescent light sources typically use blue light to excite yellow phosphors or fluorescent ceramics to produce yellow light, which is then mixed with a pre-set blue light to form white light. In this process, the proportion of pre-set blue light, the proportion of blue light required for fluorescence conversion, and the conversion efficiency of the fluorescence all greatly affect the color temperature consistency of the resulting white light. Therefore, this process not only requires pre-proportional blue light splitting but also necessitates the design of a blue light optical path to process the blue light before combining it with the fluorescence, resulting in a larger light source size and increased cost.
[0004] In existing technologies, many also employ methods such as Figure 1 The white light source architecture shown is combined with Figure 1 The laser component 1' emits excitation light, which is split into two paths by the beam splitter / combiner 2': one path passes through the beam splitter / combiner 2' as excitation light to excite the fluorescent component 3', generating excited light which is reflected by the fluorescent component 3' back to the beam splitter / combiner 2'; the other path is reflected by the beam splitter / combiner 2' to the reflector 4', and is reflected by the reflector 4' to form the second laser; the beam splitter / combiner 2' combines the excited light and the second laser and emits them to form the emitted light of the light source. In this light source architecture, the beam splitter / combiner uses a proportional coating method for blue light splitting, or a regional coating method for blue light splitting. That is, the blue light and yellow light are proportionally distributed by the coating of the dichroic mirror. The color temperature consistency of the light source is too dependent on the coating of the dichroic mirror, which can easily lead to large differences in color temperature consistency in a batch of light sources produced. However, stage light columns have high requirements for color temperature consistency (±150K).
[0005] Existing technologies still use a projector's blue light to circle around the light path, while a yellow light reflection-type light path architecture can achieve color temperature consistency, but it leads to increased size and cost. In addition, it is prone to screen flickering when taking pictures with a mobile phone, which cannot meet the needs of stage lights and cultural tourism beams. Utility Model Content
[0006] The technical problem to be solved by this utility model is to provide a high-consistency transmissive wavelength conversion device to address the shortcomings of the prior art. This high-consistency transmissive wavelength conversion device transforms the color temperature consistency controlled by optical coating spectrum into a control based on structural dimensions. This transformation can greatly improve the color temperature consistency and at the same time improve the reliability of the dynamic wavelength conversion light source.
[0007] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a highly consistent transmission wavelength conversion device, comprising: a circular substrate; a coating layer is disposed on the circular substrate, the coating layer transmits excitation light within 35° and reflects excitation light above 35° and all laser light; multiple unit areas are continuously and uniformly arranged on the circular substrate, the multiple unit areas forming a 360° ring; each unit area is composed of a wavelength conversion material area and a transmission material area, and the ratio of the angle occupied by the wavelength conversion material area to the angle occupied by the transmission material area in each unit area is the same; a motor is also disposed on the circular substrate.
[0008] Further, preferably, the coating layer is configured to transmit excitation light of the first polarization state within 35°, and reflect excitation light of the second polarization state within 35°, excitation light of more than 35°, and all laser-induced light.
[0009] Furthermore, the transmission material region also includes a diffusion structure.
[0010] Furthermore, the diffusion structure is configured as a rough structure or a diffusion layer with a scattering particle structure.
[0011] Furthermore, the slurry of scattering powder particles is molded onto a substrate to form a diffusion layer with a scattering particle structure.
[0012] Furthermore, the thickness of the material layer in the wavelength conversion material region is between 0.03 and 0.3 mm.
[0013] Furthermore, the motor's rotational frequency is A, and the proportion of each unit area angle to the 360° circumference angle is b, where C = A / b, and C is greater than or equal to 240Hz.
[0014] Furthermore, the ratio of the angle occupied by the wavelength conversion material region to the angle occupied by the transmission material region in each unit region is 2:1 to 5:1.
[0015] Furthermore, the circular substrate is a one-piece structure; or, the circular substrate is a split structure, with the seam located in the transmission material region and configured as a diffusion structure, or the seam located in the wavelength conversion material region.
[0016] Furthermore, a light source architecture using the aforementioned wavelength conversion device includes an excitation light generator, a lens group, an excitation light lens group, and an output light lens group arranged sequentially along the same horizontal axis, with the wavelength conversion device arranged between the lens group and the excitation light lens group.
[0017] This utility model has the following beneficial effects:
[0018] 1. This application provides a highly consistent transmissive wavelength conversion device that transforms the color temperature consistency controlled by optical coating spectrum into one controlled by structural dimensions. This transformation can greatly improve the color temperature consistency and improve the reliability of dynamic wavelength conversion light sources.
[0019] 2. This application provides a light source architecture that can eliminate the blue light path, reduce the size of the light source, and lower the cost; it solves the problems of poor white light color temperature consistency, high cost, and large size in the application of laser fluorescent white light sources in stage lights and beam lights.
[0020] 3. The motor's rotational speed frequency is A, and the proportion of each unit area angle to the 360° circumference angle is b. Wherein, C = A / b, C is greater than or equal to 240Hz, and the larger the better, so as to achieve a high refresh rate and eliminate screen flickering when the mobile phone takes pictures. Attached Figure Description
[0021] Figure 1 This is a schematic diagram of the architecture of a white light source in the existing technology.
[0022] Figure 2 This is a schematic diagram of the structure of a high-consistency transmission wavelength conversion device according to this utility model.
[0023] Figure 3 This is a side view of a highly consistent transmission wavelength conversion device according to this utility model.
[0024] Figure 4 This is a schematic diagram of a light source architecture according to the present invention.
[0025] Figure 5 This is a schematic diagram of a modular circular substrate structure of this utility model.
[0026] Figure 6 This is another schematic diagram of the circular substrate of this utility model having a split structure.
[0027] Among them are: 1'. Laser component; 2'. Beam splitter / combiner; 3'. Fluorescent component; 4'. Reflector component.
[0028] Among them are: 1. Excitation lens group; 3. Light-emitting lens group; 4. Excitation light generator; 5. Wavelength conversion device; 51. Circular substrate; 52. Unit area; 53. Wavelength conversion material area; 54. Transmitting material area; 55. Motor; 6. Seam; 7. Lens group. Detailed Implementation
[0029] The present invention will now be described in further detail with reference to the accompanying drawings and specific preferred embodiments.
[0030] In the description of this utility model, it should be understood that the terms "left side," "right side," "upper part," "lower part," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. "First," "second," etc., do not indicate the importance of the components, and therefore should not be construed as a limitation of this utility model. The specific dimensions used in this embodiment are only for illustrating the technical solution and do not limit the protection scope of this utility model.
[0031] Example 1
[0032] like Figure 2-3 As shown, a highly consistent transmissive wavelength conversion device 5 includes: a circular substrate 51, on which a coating layer is disposed, the coating layer transmitting excitation light within 35° and reflecting excitation light above 35° and all laser-received light; multiple unit regions 52 are continuously and uniformly arranged on the circular substrate, the multiple unit regions forming a 360° ring; each unit region is composed of a wavelength conversion material region 53 and a transmissive material region 54, and the ratio of the angle occupied by the wavelength conversion material region to the angle occupied by the transmissive material region in each unit region is the same; a motor 55 is also disposed on the circular substrate.
[0033] Further, preferably, the coating layer is configured to transmit excitation light of the first polarization state within 35°, and reflect excitation light of the second polarization state within 35°, excitation light of more than 35°, and all laser-received light.
[0034] The wavelength conversion material region contains wavelength conversion material, which can convert excitation light into yellow light.
[0035] It can be understood that the wavelength conversion materials arranged in the wavelength conversion material region are the same wavelength conversion materials or substantially the same wavelength conversion materials. The same or substantially the same means that the spectrum and efficiency produced after excitation are the same or substantially the same.
[0036] The transmission material region is equipped with transmission structure material, which can transmit the excitation light incident on it.
[0037] Furthermore, the transmission material region also includes a diffusion structure, which diffuses the excitation light transmitted by the transmission structure, thereby increasing the angle of the excitation light and making its emitted angle after diffusion close to the emitted angle of the wavelength-converted light.
[0038] Furthermore, optionally, the diffusion structure is configured as a coarse structure.
[0039] Further, preferably, the diffusion structure is a diffusion layer with a scattering particle structure; specifically, a slurry of scattering powder particles is formed on a substrate to form a diffusion layer with a scattering particle structure.
[0040] Furthermore, the selected scattering powder particles have a particle size of less than 0.5 μm, and are preferably spherical or near-spherical particles. The material is preferably a white material, such as barium sulfate, silicon oxide, titanium oxide, boron nitride, aluminum oxide, etc.
[0041] Furthermore, the thickness of the diffusion layer is less than 0.15 mm.
[0042] like Figure 2 As shown, wavelength conversion material region and transmission material region are disposed on a circular substrate, and the two are disposed alternately to form a 360° ring. Adjacent wavelength conversion material region and transmission material region form a unit region, and each unit region occupies the same angle in the 360° circumferential area.
[0043] Furthermore, the ratio of the angle occupied by the wavelength conversion material region to the angle occupied by the transmission material region in each unit area is 2:1 to 5:1, which can meet the color temperature requirements of 6500-9500K.
[0044] Furthermore, the thickness of the material layer in the wavelength conversion material region is between 0.03 and 0.3 mm.
[0045] The circular substrate is equipped with a motor, which drives the circular substrate to rotate rapidly.
[0046] Furthermore, the motor is located at the center of the bottom of the circular substrate, enabling the motor to drive the circular substrate to rotate rapidly.
[0047] Furthermore, the motor's rotational speed frequency is A, and the proportion of each unit area angle to the 360° circumference angle is b. Wherein, C = A / b, C is greater than or equal to 240Hz, and the larger the better, so as to achieve a high refresh rate and eliminate screen flickering when the mobile phone takes pictures.
[0048] This highly consistent transmissive wavelength conversion device transforms the color temperature consistency, which is controlled by optical coating spectrum, into one controlled by structural dimensions. This transformation greatly improves color temperature consistency and enhances the reliability of the dynamic wavelength conversion light source.
[0049] like Figure 4 As shown, a light source architecture using the above-mentioned wavelength conversion device includes an excitation light generator 4, a lens group 7, an excitation light lens group 1, and an output light lens group 3 arranged sequentially along the same horizontal axis, with the wavelength conversion device 5 arranged between the lens group 7 and the excitation light lens group 1.
[0050] like Figure 4 As shown, the excitation light generator 4 emits excitation light, which is converged by the lens group 7 and then incident on the circular substrate 51 of the wavelength conversion device 5. The excitation light incident on the transmission material region is diffused by the diffusion structure and then emitted along the emission direction, forming a light cone with a larger angle than the original incident angle. The excitation light incident on the wavelength conversion material is converted into yellow light by the wavelength conversion material, and then the yellow light is reflected by the substrate and emitted along the light emission direction. The two light cone angles are approximately the same. The two light cone angles are collected and shaped by the excitation light lens group 1 and the emission lens group 3 at the rear end. This light source architecture can eliminate the blue light path, reduce the size of the light source, and reduce costs; it solves the problems of poor white light color temperature consistency, high cost, and large size of laser fluorescent white light sources in stage lights and beam lights.
[0051] Example 2
[0052] Based on Example 1, the circular substrate can be an integral structure or a split structure.
[0053] Preferably, the circular substrate has a split structure, which is formed by splicing together several fan-shaped or semi-circular structures, thus reducing material costs and processing difficulty.
[0054] Further, preferably, such as Figure 5 As shown, seam 6 is located in the transmissive material area and is configured as a diffusion structure, which fully covers seam 6.
[0055] Further, optionally, such as Figure 6 As shown, the seam 6 is located in the wavelength conversion material area, and the seam 6 is covered with wavelength conversion material.
[0056] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.
[0057] The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the specific details of the above embodiments. Within the scope of the technical concept of the present invention, various equivalent transformations can be made to the technical solutions of the present invention, and all such equivalent transformations fall within the protection scope of the present invention.
Claims
1. A highly consistent transmission-type wavelength conversion device, characterized in that: include: A circular substrate; a coating layer is provided on the circular substrate, the coating layer transmits excitation light within 35° and reflects excitation light above 35° and all laser light; multiple unit regions are continuously and uniformly arranged on the circular substrate, and the multiple unit regions form a 360° ring; each unit region consists of a wavelength conversion material region and a transmission material region, and the ratio of the angle occupied by the wavelength conversion material region to the angle occupied by the transmission material region in each unit region is the same; a motor is also arranged on the circular substrate.
2. The high-uniformity transmission wavelength conversion device according to claim 1, characterized in that: The coating layer is configured to transmit excitation light of the first polarization state within 35°, reflect excitation light of the second polarization state within 35°, excitation light above 35°, and all laser-induced light.
3. The high-uniformity transmission wavelength conversion device according to claim 1, characterized in that: The transmission material region also includes a diffusion structure.
4. The high-uniformity transmission wavelength conversion device according to claim 3, characterized in that: The diffusion structure is configured as a rough structure or as a diffusion layer with a scattering particle structure.
5. The high-uniformity transmission wavelength conversion device according to claim 4, characterized in that: A slurry of scattering powder particles is formed on a substrate to create a diffusion layer with a scattering particle structure.
6. The high-uniformity transmission wavelength conversion device according to claim 1, characterized in that: The thickness of the material layer in the wavelength conversion material region is between 0.03 and 0.3 mm.
7. The high-uniformity transmission wavelength conversion device according to claim 1, characterized in that: The motor's rotational frequency is A, and the proportion of each unit area's angle to the 360° circumference is b, where C = A / b, and C is greater than or equal to 240Hz.
8. The high-uniformity transmission wavelength conversion device according to claim 1, characterized in that: The ratio of the angle occupied by the wavelength conversion material region to the angle occupied by the transmission material region in each unit area is 2:1 to 5:
1.
9. The high-uniformity transmission wavelength conversion device according to claim 1, characterized in that: The circular substrate is a single-piece structure; or, the circular substrate is a split structure, with the seam located in the transmissive material region and configured as a diffusion structure, or the seam located in the wavelength conversion material region.
10. A light source architecture, characterized in that: The device includes a high-consistency transmission wavelength conversion device as described in any one of claims 1-9, and an excitation light generator, a lens group, an excitation light lens group, and an output light lens group arranged sequentially along the same horizontal axis, with the wavelength conversion device arranged between the lens group and the excitation light lens group.