Static wavelength conversion device and projection system
By employing a carrier substrate structure consisting of a metal substrate and an elastic layer in the wavelength conversion device, the problem of aluminum substrate deformation at high temperatures is solved, achieving good heat dissipation and extended lifespan, and meeting the requirements for high brightness.
Patent Information
- Application Number
- CN202423203205.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-25
- Publication Date
- 2026-02-06
- Estimated Expiration
- 2034-12-25
AI Technical Summary
In existing projection systems, the aluminum substrate of the wavelength conversion device is prone to deformation under high temperature conditions, which can lead to cracking or reduced lifespan. Furthermore, its heat dissipation is poor, making it difficult to meet high brightness requirements.
The substrate structure includes a metal substrate and an elastic layer. The elastic layer is composed of a high-temperature resistant adhesive and thermally conductive particles to alleviate the deformation of the metal substrate and improve heat dissipation performance.
It effectively prevents substrate deformation, improves heat dissipation, reduces weight, lowers energy consumption, extends device life, and meets high brightness requirements.
Smart Images
Figure CN223883904U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to wavelength conversion technical field more particularly, the utility model relates to a kind of static wavelength conversion device and projection system. BACKGROUND
[0002] Recently, projection devices mainly using solid-state light sources such as light-emitting diodes (LEDs) and laser diodes are gradually gaining a foothold in the market. Generally speaking, the excitation light of these solid-state light sources is converted by wavelength conversion materials on the wavelength conversion module in the projection device to generate conversion light of different colors.
[0003] In the prior art, the structure of a projection system generally includes a laser module, a dichroic mirror, a light conversion component, and a wavelength conversion device. The current wavelength conversion device includes an aluminum substrate, a wavelength conversion layer, and a diffuse reflection layer. The diffuse reflection layer is disposed on the surface of the substrate, and the wavelength conversion layer is disposed on the surface of the diffuse reflection layer away from the substrate. With the increasing demand for brightness, the power of the laser as the excitation light also increases. On the one hand, the brightness is improved by improving the heat dissipation structure of the wavelength conversion device, and on the other hand, the heat dissipation is improved by increasing the diameter of the wavelength conversion device. Generally, the thickness of the aluminum substrate as the wavelength conversion device is between 0.7-1.5 mm. Considering the motor load, the thickness needs to be designed to be thin with the increase of the diameter, but under the condition of long-term high temperature or high temperature rotation, the aluminum substrate is easy to deform, causing the wavelength conversion layer to crack and fall off or reducing the service life.
[0004] In summary, there is an urgent need to provide a wavelength conversion device and a projection system with a new design or a new structure to solve the technical problems existing in the prior art. UTILITY MODEL CONTENT
[0005] Therefore, it is necessary to provide a static wavelength conversion device and a projection system to solve the above technical problems.
[0006] One technical solution of the utility model is:
[0007] A static wavelength conversion device, characterized by comprising:
[0008] A bearing substrate, the bearing substrate includes a metal substrate and an elastic layer, the metal substrate and the elastic layer are stacked; wherein the elastic layer has elasticity;
[0009] A wavelength conversion layer, the wavelength conversion layer is disposed on the side of the elastic layer away from the metal substrate.
[0010] In one embodiment, the Shore hardness of the elastic layer ranges from 30A to 70A.
[0011] In one of the embodiments, a reflective layer is further arranged between the elastic layer and the wavelength conversion layer, wherein the reflective layer is a specular reflective layer or a diffuse reflective layer.
[0012] In one of the embodiments, the carrier substrate further comprises a substrate, which is arranged between the elastic layer and the wavelength conversion layer, and is connected with the metal substrate through the elastic layer.
[0013] In one of the embodiments, the substrate is made of a metal sheet or a ceramic sheet.
[0014] In one of the embodiments, a reflective layer is further arranged between the substrate and the wavelength conversion layer, wherein the reflective layer is a specular reflective layer or a diffuse reflective layer.
[0015] In one of the embodiments, metal particles are arranged in the elastic layer, and the metal particles are one of gold, silver, copper and aluminum.
[0016] In one of the embodiments, the total thickness of the metal substrate, the elastic layer and the substrate is not more than 3mm.
[0017] In one of the embodiments, the thickness of the metal substrate is not more than 1.5mm, and the elastic layer is made of a high-temperature-resistant adhesive.
[0018] A projection system, characterized in that the projection system comprises the wavelength conversion device according to any one of the preceding claims.
[0019] The static wavelength conversion device provided by the present application has the following beneficial effects:
[0020] (1) The static wavelength conversion device provided by the present application comprises a metal substrate and an elastic layer, the elastic layer is arranged on the surface of the metal substrate, and the elastic layer has a certain elasticity, so that the deformation of the metal substrate in the prior art can be solved, and the deformation of the metal substrate is relieved by the elastic layer with elasticity.
[0021] (2) The elastic layer used in the present application is a good heat dissipation adhesive layer, and the new structure of the carrier substrate can use a thinner metal substrate, thereby greatly reducing the weight of the carrier substrate and reducing energy consumption.
[0022] (3) In order to improve the heat dissipation effect of the carrier substrate, the material of the elastic layer is recombined, and heat-conducting particles with excellent heat dissipation are doped in the elastic layer (adhesive), such as metal particles doped in silica gel, so that the heat dissipation effect of the carrier substrate is greatly improved. BRIEF DESCRIPTION OF DRAWINGS
[0023] Figure 1A static wavelength conversion device structure schematic diagram of the utility model;
[0024] Figure 2 Another structure schematic diagram of a static wavelength conversion device of the utility model;
[0025] Figure 3 Another structure schematic diagram of a static wavelength conversion device of the utility model;
[0026] Figure 4 Another structure schematic diagram of a static wavelength conversion device of the utility model;
[0027] Figure 5 A projection system simple light path schematic diagram of the utility model. DETAILED DESCRIPTION
[0028] In order to facilitate understanding of the utility model, the utility model will be described more fully below with reference to the relevant drawings. The preferred embodiments of the utility model are shown in the drawings. However, the utility model can be realized in many different forms and is not limited to the embodiments described below. On the contrary, the purpose of providing these embodiments is to make the disclosure of the utility model more thorough and comprehensive.
[0029] It should be noted that when an element is referred to as "provided on" another element, it can be directly on the other element or there can be a middle element. When an element is referred to as "connected" to another element, it can be directly connected to the other element or there can be a middle element. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation.
[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the utility model belongs. The terms used in the specification of the utility model herein are only for the purpose of describing specific embodiments and are not intended to limit the utility model. The term "and / or" used herein includes any and all combinations of one or more related listed items.
[0031] A static wavelength conversion device, wherein the wavelength conversion device can be used in a projection system, and can also be used in a light source system, as long as the light emitting demand needs wavelength conversion, the wavelength conversion device designed in the application can be used; the wavelength conversion device comprises:
[0032] The carrying substrate includes a first surface and an oppositely arranged second surface, and includes a metal substrate and an elastic layer, wherein the surface of the metal substrate is directly provided with the elastic layer; the first surface of the carrying substrate is the surface of the elastic layer away from the metal substrate, and the second surface of the carrying substrate is the surface of the metal substrate away from the elastic layer; the metal substrate can be an aluminum substrate or a substrate made of other metal materials; the elastic layer needs to have a certain elasticity, so that when the metal substrate is deformed by high temperature, a certain tension is released through the elastic layer to ensure that the substrate is not deformed.
[0033] The wavelength conversion layer is arranged on the side of the elastic layer away from the metal substrate, and is composed of a fluorescent material which can be formed on the surface of the substrate by coating, deposition or the like. The wavelength conversion layer emits excited light after being irradiated by laser, and then the excited light is directly emitted or emitted after being combined with other light.
[0034] In an embodiment, the Shore hardness of the elastic layer ranges from 30A to 70A, so that the elastic layer has a certain elasticity, and when the metal substrate (for example, an aluminum substrate) is deformed by heat, the elastic layer (for example, silica gel) can release the deformation force brought by the metal substrate, so as not to affect the wavelength conversion layer. The elastic layer is composed of a high-temperature-resistant adhesive. The reason for selecting a high-temperature-resistant material is that when the wavelength conversion device is irradiated by laser, a large amount of heat will be generated. If the elastic layer cannot resist high temperature, the wavelength conversion device will be directly damaged.
[0035] Furthermore, the elastic layer not only needs to resist high temperature, but also needs to have good heat conductivity. However, the elastic layer mainly plays a role of a bonding layer, and generally uses silica gel. The thermal conductivity of ordinary organic silica gel is about 0.2 W / m·K, and the thermal conductivity of heat-conducting silica gel generally ranges from 0.8 to 5.0 W / m·K. Therefore, in the present application, according to the design specifications and requirements of the wavelength conversion device, the material of the elastic layer is developed, and the elastic layer includes an adhesive and heat-conducting particles. The adhesive can be a common adhesive such as resin glue and silica gel, and the heat-conducting particles can be metal particles, high polymer particles and compounds, etc. The proportion of the adhesive is 20 to 70 parts, and the proportion of the heat-conducting particles is 30 to 80 parts. The heat-conducting particles are preferably metal particles, and when the proportion of the metal particles is 40 to 70 parts, the heat-conducting performance of the elastic layer is the best and the adhesive force for the metal substrate and the substrate is the best. Of course, the elastic layer can also include a plurality of heat-conducting particles, i.e. one or more than two combinations of metal particles, high polymer particles and compounds.
[0036] In one of the embodiments, the elastic layer is provided with a reflective layer away from the metal substrate, and the reflective layer is located between the wavelength conversion layer and the elastic layer. The reflective layer can be a mirror reflection structure or a diffuse reflection structure. The reflective layer is formed on the surface of the substrate by deposition, sputtering or other methods. The reflective layer mainly reflects the excited light and the excitation light, and tries to ensure the utilization rate of light.
[0037] In one of the embodiments, the carrier substrate further comprises a substrate located between the elastic layer and the wavelength conversion layer, and the substrate is connected with the metal substrate through the elastic layer. The substrate is made of a metal sheet or a ceramic sheet. The substrate material can be selected according to the specific application scenario, and can be metal or ceramic. The substrate and the metal substrate form a "sandwich" laminated structure through the elastic layer. This structure can reduce or avoid the adverse effects caused by the thermal deformation of the metal substrate. At the same time, under the condition of the same thickness and area, this structure is lighter, which can reduce the energy consumption of the device and is more conducive to the operation of the device. In one of the embodiments, the thickness of the metal substrate is not greater than 1.2mm. Because the metal substrate with a larger thickness may be deformed when heated, which does not affect the performance of the device, when the metal substrate is relatively thin, the use of the laminated structure can better play its advantages. Of course, it is not meant that the thicker metal substrate cannot use the laminated structure. The laminated structure can also be used for the thicker metal substrate. A reflective layer is further provided between the substrate and the wavelength conversion layer, wherein the reflective layer is a mirror reflection layer or a diffuse reflection layer.
[0038] A projection system, characterized in that the projection system comprises the static wavelength conversion device according to any one of the above embodiments.
[0039] Please refer to Figure 1 A static wavelength conversion device, the carrier substrate comprises a metal substrate 11, an elastic layer 12 and a wavelength conversion layer 20. The metal substrate 11 and the elastic layer 12 are laminated, the elastic layer 12 has a certain elasticity, and the elastic layer 12 is provided with metal particles, which can increase the heat dissipation performance of the elastic layer 12. The metal particles can be gold, silver, copper, aluminum and other metal materials. The wavelength conversion layer 20 is located away from the metal substrate 11, and the metal substrate 11 can be an aluminum substrate. The thickness of the aluminum substrate is not greater than 1.5mm.
[0040] Please refer to Figure 2, another static wavelength conversion device, the wavelength conversion layer 20 and the elastic layer 12 are further provided with a reflective layer 30, the reflective layer 30 can be a mirror or diffuse reflection layer, the reflective layer 30 can be formed on the surface of the elastic layer 12 by evaporation or sputtering, the reflective layer 30 can also be provided with reflective particles in the adhesive, so as to achieve the effect of reflection.
[0041] Please refer to Figure 3 and Figure 4 A static wavelength conversion device, the bearing substrate 10 includes a metal substrate 11, an elastic layer 12 and a substrate 13, the metal substrate 11 is connected with the substrate 13 through the elastic layer 12, the wavelength conversion layer 21 is arranged on the side of the substrate 13 away from the metal substrate 11; the metal substrate 11 can be an aluminum substrate, the thickness of the aluminum substrate is generally not more than 1.5mm, of course, the metal substrate 11 can also be other materials, the elastic layer is generally selected to have the function of bonding silica gel, and the silica gel needs to have certain high temperature resistance, the substrate 13 can be a general ceramic sheet, such as aluminum nitride, can also be other high temperature resistant materials, also the substrate can be a high temperature resistant and not easy to deform metal substrate; the substrate 13 and the wavelength conversion layer 20 are further provided with a reflective layer 30, wherein the reflective layer 30 is a mirror or diffuse reflection layer. The total thickness of the metal substrate, the elastic layer and the substrate is not more than 3mm.
[0042] Please refer to Figures 1-4 The bearing substrate of the static wavelength conversion device includes a metal substrate 11, an elastic layer 12 and the substrate 13, the elastic layer 12 is doped with heat conducting particles, the elastic layer 12 formed by mixing heat conducting particles and adhesive not only has viscosity and elasticity, but also has good heat dissipation function, wherein the heat conducting particles can be metal particles, organic heat conducting particles or compounds, preferably metal particles, such as gold, silver, copper, aluminum and other good heat conducting metals, of course, the heat conducting particles doped in the elastic layer 12 can be a mixture of metal ions and compounds, or a mixture of organic heat conducting particles and the like combination; The proportion of the heat conducting particles in the elastic layer 12 is very important, which not only relates to the heat conducting performance of the elastic layer, but also directly affects the adhesion effect of the elastic layer, therefore, the proportion of the heat conducting particles is controlled between 30 and 80 parts, when the heat conducting particles are preferably metal particles, and the proportion of the metal particles is 40-70 parts, the heat conducting and adhesion are best.
[0043] Please read Figure 5A projection system comprises a static wavelength conversion device 100, a laser light source 200, a first optical element 300, a second optical element 310, a light homogenizing element 400, and a beam splitter 500. Figure 5 The above merely gives a light path diagram, and a suitable light path can be designed according to different wavelength conversion devices or requirements.
[0044] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the above detailed description of the specific embodiments of the present application is combined with the drawings. In the above description, many specific details are set forth in order to fully understand the present application. However, the present application can be implemented in many other ways different from the above description, and those skilled in the art can make similar improvements without departing from the concept of the present application, therefore the present application is not limited by the above disclosed specific embodiments. Moreover, each technical feature of the above described embodiments can be combined arbitrarily, in order to make the description simple, each technical feature in the above described embodiments has not been described in all possible combinations, however, as long as the combination of these technical features does not exist contradictory, it should be considered as the scope of the present application.
[0045] The above described embodiments only express several implementation manners of the present application, the description is more specific and detailed, but it should not be understood as a limitation on the scope of the present application. It should be pointed out that for those skilled in the art, without departing from the concept of the present application, several modifications and improvements can be made, which all belong to the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.
Claims
1. A static wavelength conversion device, characterized by, The application relates to a static wavelength conversion device. The application relates to a static wavelength conversion device. The application relates to a static wavelength conversion device.
2. A static wavelength conversion device according to claim 1, characterized in that The application relates to a static wavelength conversion device.
3. A static wavelength conversion device according to claim 2, c h a r a c t e r i z e d in that The application relates to a static wavelength conversion device.
4. A static wavelength conversion device according to claim 2, wherein, The application relates to a static wavelength conversion device.
5. A static wavelength conversion device according to claim 4, characterised in that, The application relates to a static wavelength conversion device.
6. A static wavelength conversion device according to claim 4, wherein, The application relates to a static wavelength conversion device.
7. A static wavelength conversion device according to claim 1, wherein, The application relates to a static wavelength conversion device.
8. A static wavelength conversion device according to claim 4, wherein, The application relates to a static wavelength conversion device.
9. A static wavelength conversion device according to any of claims 1 to 8, characterized in that The application relates to a static wavelength conversion device.
10. A projection system, characterized by The application relates to a static wavelength conversion device. The application relates to a static wavelength conversion device. The application relates to a static wavelength conversion device. The application relates to a static wavelength conversion device. The application relates to a static wavelength conversion device. The application relates to a static wavelength conversion device. The application relates to a static wavelength conversion device. The application relates to a static wavelength conversion device. The application relates to a static wavelength conversion device. The application relates to a static wavelength conversion device. The application relates to a static wavelength conversion device. The application relates to a static wavelength conversion device. The application relates to a static wavelength conversion device. The application relates to a static wavelength conversion device. The application relates to a static wavelength conversion device. The application relates to a static wavelength conversion device. The application relates to a static wavelength conversion device. The application relates to a static wavelength conversion device. The application relates to a static wavelength conversion device. The application relates to a static wavelength conversion device. The application relates to a static wavelength conversion device. The application relates to a static wavelength conversion device. The application relates to a static wavelength conversion device. The application relates to a static wavelength conversion device. The application relates to a static wavelength conversion device. The application relates to a static wavelength conversion device. The application relates to a static wavelength conversion device. The application relates to a static wavelength conversion device. The application relates to a static wavelength conversion device. The application relates to a static wavelength conversion device. The application relates to a static wavelength conversion device. The application relates to a static wavelength conversion device. The application relates to a static wavelength conversion device. The application relates to a static wavelength conversion device. The application relates to a static wavelength conversion device. The application relates to a static wavelength conversion device. The application relates to a static wavelength conversion device. The application relates to a static wavelength conversion device. The application relates to a static wavelength conversion device. The application relates to a static wavelength conversion device. The application relates to a static wavelength conversion device. The application relates to a static wavelength conversion device. The application relates to a static wavelength conversion device. The application relates to a static wavelength conversion device. The application relates to a static wavelength conversion device. The application relates to a static wavelength conversion device. The application relates to a static wavelength conversion device. The application relates to a static wavelength conversion device. The application relates to a static wavelength conversion device. The application relates to a static wavelength conversion device. The application relates to a static wavelength conversion device. The application relates to a static wavelength conversion device. The application relates to a static wavelength conversion device. The application relates to a static wavelength conversion device. The application relates to a static wavelength conversion device. The application relates to a static wavelength conversion device. The application relates to a static wavelength conversion device. The application relates to a static wavelength conversion device. The application relates to a static wavelength conversion device. The application relates to a static wavelength conversion device. The application relates to a static wavelength conversion device. The application relates to a static wavelength conversion