Laser display device

Abstract

The embodiment of the utility model provides a laser display device, belongs to the technical field of household appliances, and aims to solve the technical problem of high temperature of a fluorescent wheel in related technologies. The laser display device comprises a light source, a fluorescent wheel and a radiator, the radiator comprises a vapor chamber, wherein a fixing part is arranged on the first surface of the vapor chamber; the heat dissipation fins are arranged on the second surface of the vapor chamber; the fluorescent wheel is provided with a mounting part which is arranged on the back surface of the fluorescent wheel; the mounting part is connected with the fixing part and attached to the first surface of the vapor chamber. According to the laser display device, the fluorescent wheel is directly installed on the vapor chamber, the heat transfer path is shortened, heat of the fluorescent wheel can be directly conducted to the heat dissipation fins from the vapor chamber for heat dissipation, heat conduction among multiple media is avoided, the heat resistance is lower, the heat dissipation efficiency of the fluorescent wheel is improved, the operation temperature of the fluorescent wheel is reduced, and the service life of the fluorescent wheel is prolonged. And meanwhile, the overall size of the radiator is reduced.

Description

Technical Field

[0001] This application relates to the field of household appliance technology, and more particularly to a laser display device. Background Technology

[0002] A laser display device is a common display device that includes a light source and a phosphor wheel. The light source emits excitation light into the phosphor wheel, which absorbs and converts the excitation light from the light source to form laser beams of various colors. The combined laser beams then form a colored light beam.

[0003] However, when the laser display device is in operation, the excitation light shines on the phosphor wheel, which generates a lot of heat and the phosphor wheel gets very hot, affecting the normal use of the laser display device. Utility Model Content

[0004] This application provides a laser display device that can solve the technical problem of high temperature of the fluorescent wheel.

[0005] In a first aspect, embodiments of this application provide a laser display device, including...

[0006] A light source used to emit excitation light;

[0007] A fluorescent wheel that absorbs and converts excitation light from the light source to form a laser-induced emission.

[0008] Radiator, the radiator comprising:

[0009] A heat spreader, wherein a fixing part is provided on the first surface of the heat spreader;

[0010] Heat dissipation fins are disposed on the second surface of the heat spreader;

[0011] The fluorescent wheel is provided with a mounting part, which is located on the back of the fluorescent wheel; the mounting part is connected to the fixing part and is attached to the first surface of the heat spreader.

[0012] This configuration ensures rapid and even heat distribution while directly dissipating heat through the vapor chamber, preventing localized overheating from affecting the phosphor wheel's operation. By directly mounting the phosphor wheel on the vapor chamber, the heat transfer path is shortened, allowing heat from the phosphor wheel to be directly conducted to the heat dissipation fins, avoiding heat conduction between multiple media, resulting in lower thermal resistance, improved heat dissipation efficiency, and reduced operating temperature of the phosphor wheel, while also reducing the overall size of the heat sink. The improved heat dissipation efficiency reduces reliance on high-power fans, thus lowering noise levels. Effective thermal management reduces device malfunctions caused by overheating, improving the reliability of the laser display device.

[0013] In some embodiments of this application, the heat sink includes:

[0014] A first heat pipe, the first end of which is connected to the heat spreader, and the second end of which is connected to the heat dissipation fins.

[0015] This configuration allows heat to be transferred directly from the fluorescent wheel to the heat spreader, and then through the first heat pipe to the heat dissipation fins. This avoids heat conduction between multiple media, shortens the heat transfer path, reduces thermal resistance, improves overall heat dissipation efficiency, and lowers the operating temperature of the fluorescent wheel. Due to the optimized heat transfer path and the efficient heat distribution of the heat spreader, the need for large heat dissipation components is reduced, thereby decreasing the overall size of the device.

[0016] In some embodiments of this application, at least a portion of the first heat pipe passes through the heat dissipation fins;

[0017] In the thickness direction of the heat spreader, the ratio of the length of the first heat pipe passing through the heat dissipation fin to the height of the heat dissipation fin is greater than or equal to 0.5.

[0018] With this configuration, heat can be dissipated along the height direction of the heat dissipation fins via the first heat pipe, allowing the fins in the height direction of the heat dissipation fins to participate in heat dissipation and improving the heat dissipation efficiency of the fluorescent wheel.

[0019] In some embodiments of this application, the first heat pipe is located outside the heat dissipation fins;

[0020] In the thickness direction of the heat spreader, the ratio of the distance between the second end of the first heat pipe and the heat spreader to the height of the heat dissipation fins is greater than or equal to 0.5.

[0021] With this configuration, the ratio of the distance between the first heat pipe and the heat spreader to the height of the heat dissipation fins is greater than or equal to 0.5, which allows heat to be transferred more effectively to the outer area of ​​the heat dissipation fins, thus improving the heat diffusion and dissipation efficiency of the fluorescent wheel.

[0022] In some embodiments of this application, the first heat pipe passes through the heat spreader, and the first end of the first heat pipe extends out of the first surface of the heat spreader; or, the first end of the first heat pipe is flush with the first surface of the heat spreader.

[0023] With this configuration, by inserting the first heat pipe through the heat spreader and extending it out of its surface, the first heat pipe can not only transfer heat from the heat spreader but also absorb heat from the air around the fluorescent wheel, improving the overall heat transfer efficiency and reducing the operating temperature of the fluorescent wheel. The first end of the first heat pipe can be either extended or flush with the surface according to specific needs, providing design flexibility to adapt to different heat dissipation requirements and structural requirements. Due to the optimization of the heat transfer path and the efficient heat distribution of the heat spreader, the need for large heat dissipation components is reduced, thereby reducing the overall size of the device.

[0024] In some embodiments of this application, the first end of the first heat-conducting pipe is connected to the fixing part; and / or, the first end of the first heat-conducting pipe is in contact with the mounting part.

[0025] This configuration, by connecting the first heat pipe to the fixing part, ensures the stability of the first heat pipe in the mechanical structure, providing not only physical support but also direct heat transfer through the fixing part; direct contact with the high-temperature area of ​​the fluorescent wheel allows heat to be quickly transferred to the first heat pipe, reducing the operating temperature of the fluorescent wheel; the connection method of the first heat pipe can be selected according to specific needs to optimize the heat dissipation path and structural stability; by reducing thermal resistance and optimizing the heat transfer path, the risk of overheating is reduced, and the long-term stability of the system is improved.

[0026] In some embodiments of this application, the first heat pipe is integrally disposed with the heat spreader;

[0027] The heat spreader is provided with a first flow channel, and the first heat pipe is provided with a second flow channel. The first flow channel and the second flow channel are connected.

[0028] With this configuration, the heat generated by the fluorescent wheel is transferred to the heat spreader and the first heat pipe, and then quickly transferred to the entire first and second flow channels. The large space in the first and second flow channels allows the vapor in them to directly reach the condensation end of the first heat pipe, reducing the thermal resistance from the heat spreader to the first heat pipe. This also allows the heat generated by the fluorescent wheel to be transferred to the heat dissipation fins more quickly, improving the overall heat dissipation efficiency. Furthermore, this design is suitable for confined and irregular spaces, reducing the overall size of the equipment.

[0029] In some embodiments of this application, the heat sink includes:

[0030] The second heat pipe is inserted into the heat dissipation fins; the first end of the second heat pipe is close to the heat spreader, and the second end of the second heat pipe is away from the heat spreader.

[0031] This configuration, by embedding the second heat pipe within the heat dissipation fins, shortens the heat transfer path, reduces thermal resistance, improves overall heat dissipation efficiency, and lowers the operating temperature of the phosphor wheel. The design of the second heat pipe ensures that heat is evenly distributed to all parts of the heat dissipation fins, avoiding localized overheating and improving heat dissipation performance. By optimizing the heat conduction path, the need for large heat dissipation components is reduced, thereby reducing the overall size of the device. A more effective thermal management system reduces device failures caused by overheating and improves the reliability of the laser display device.

[0032] In some embodiments of this application, the fluorescent wheel is provided with a driving member, which can drive the fluorescent wheel to rotate, and the driving member is disposed on the back of the fluorescent wheel through the mounting part.

[0033] This configuration ensures stability during high-speed rotation by tightly connecting the drive unit to the fluorescent wheel, reducing vibration and mechanical wear. By mounting the drive unit on the back of the fluorescent wheel, internal space is saved, which helps to reduce the overall size of the device.

[0034] In some embodiments of this application, an installation gap is formed between the fixing part and the heat spreader, and at least a portion of the mounting part is located within the installation gap;

[0035] The mounting part is provided with a locking position, and the mounting part is connected to the fixing part through the locking position.

[0036] By incorporating an installation gap in the mounting section, the fluorescent wheel can be tightly connected to the mounting section, allowing heat to be rapidly transferred from the fluorescent wheel to the heat spreader and further to the radiator, thus improving overall heat dissipation efficiency and reducing the operating temperature of the fluorescent wheel. The locking design ensures a stable connection between the mounting section and the mounting section, reducing vibration and displacement and improving system stability. The installation gap design allows for more flexible component layout, saving internal space and contributing to a smaller overall size. Due to the structural stability and efficient heat transfer, reliance on high-power fans can be reduced, thereby lowering noise levels. Attached Figure Description

[0037] To more clearly illustrate the implementation methods in the embodiments of this application or related technologies, the accompanying drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings.

[0038] Figure 1 This is a schematic diagram of the structure of the heat sink for the laser display device provided in the embodiments of this application;

[0039] Figure 2This is a schematic diagram of the structure of the phosphor wheel in the laser display device provided in the embodiments of this application;

[0040] Figure 3 This is an exploded view of the heat sink of the laser display device provided in the embodiments of this application;

[0041] Figure 4 A schematic diagram of a heat dissipation protrusion in a heat sink of a laser display device provided in an embodiment of this application;

[0042] Figure 5 A first schematic diagram of a first heat pipe in a heat sink of a laser display device provided in an embodiment of this application;

[0043] Figure 6 Another perspective of a first schematic diagram of a first heat pipe in a heat sink of a laser display device provided in an embodiment of this application;

[0044] Figure 7 A first viewpoint of a second schematic diagram of a first heat pipe in a heat sink of a laser display device provided in an embodiment of this application;

[0045] Figure 8 A second perspective view of a second schematic diagram of a first heat pipe in a heat sink of a laser display device provided in an embodiment of this application;

[0046] Figure 9 An exploded view of a second schematic diagram of the first heat pipe in the heat sink of the laser display device provided in the embodiments of this application;

[0047] Figure 10 A schematic diagram of the mounting holes in the heat sink of the laser display device provided in the embodiments of this application;

[0048] Figure 11 A schematic diagram of the second heat pipe in the heat sink of the laser display device provided in the embodiments of this application;

[0049] Figure 12 A schematic diagram of the first and second flow channels in the heat sink of the laser display device provided in the embodiments of this application.

[0050] Explanation of reference numerals in the attached figures:

[0051] 01. Glowing wheel;

[0052] 011. Installation Department;

[0053] 012. Drive components;

[0054] 013, Locking position;

[0055] 100. Heat spreader; 110. Fixing part; 111. Installation gap; 120. First flow channel; 130. Heat dissipation protrusion; 140. Mounting screw hole;

[0056] 200. Heat dissipation fins; 210. Mounting holes;

[0057] 300, First heat pipe; 310, Second flow channel;

[0058] 400. Second heat pipe. Detailed Implementation

[0059] As mentioned in the background section, in related technologies, laser display devices utilize a laser to convert electrical energy into a high-intensity laser beam. The laser beam passes through an optical path into a DMD micro digital control chip, and then through a lens composed of a transmissive lens and a reflective mirror, projecting the beam onto a screen. Its light source is the laser emitted by the laser, which, through reflection or integration by the optical lenses in the light source system, illuminates a phosphor wheel.

[0060] Among them, DLP (Digital Light Processing) laser projection technology combines the DLP imaging principle with a laser light source, offering a highly efficient, high-contrast, and color-rich projection method. DLP laser projection technology includes laser light sources, color separation and integration, digital micromirror devices (DMD), beam scanning and image processing, lens projection, and screen display technologies. The laser light source typically includes red, green, and blue lasers to cover the entire visible spectrum. Laser light sources provide high brightness, high stability, and long lifespan, and are more energy-efficient and have lower maintenance costs than traditional bulb light sources. The three color laser beams are precisely adjusted to ensure consistency in wavelength, intensity, and focus. These laser beams may need to be separated and recombined by optical components to achieve precise color control and mixing. Optical components typically use phosphor wheel technology. The laser light source is usually a blue laser, which shines onto a high-speed rotating phosphor wheel coated with a specific fluorescent material. When the blue laser hits the phosphor wheel, the phosphor wheel absorbs some of the blue light energy and re-emits a broader spectrum of light, primarily green light. Because the phosphor wheel is rotating, this process is very fast, ensuring color continuity and stability.

[0061] A DMD (Digital Micromirror Device) is a semiconductor optical device. The three primary colors of light converted by a phosphor wheel illuminate the DMD chip, which is an array of millions of tiny mirrors (micromirrors). Each micromirror corresponds to a pixel on the screen. These micromirrors can flip rapidly, controlling their reflection angle according to electrical signals, reflecting light onto the projection lens or deviating from the projection path, thus forming the bright and dark areas of the image. Each micromirror on the DMD chip is extremely small, approximately 16 micrometers square, and can flip independently, meaning each micromirror can be in one of two states: on (reflecting light) or off (not reflecting light). The number of micromirrors determines the resolution of the projected image; for example, a 1080p DMD chip has approximately 2 million micromirrors, while a 4K DMD chip has over 8 million. By rapidly and precisely controlling the state of each micromirror, the DMD can create high-resolution, high-contrast images.

[0062] Therefore, the fluorescent wheel is a key component in laser projection technology. When the laser beam shines directly onto the surface of the fluorescent wheel, the wheel itself rotates at high speed, generating a large amount of heat that accumulates on it. A stable heat dissipation system is needed to control the temperature and ensure the normal operation of the laser projection system.

[0063] Existing technologies typically utilize high thermal conductivity metal modules to absorb heat from the casing surrounding the glow wheel. Heat is then transferred to heat dissipation fins using heat pipe phase change heat transfer, liquid cooling convection, or thermoelectric cooling principles. These fins increase the heat dissipation area, and a fan further cools the fins, achieving the goal of cooling the casing surrounding the glow wheel. The advantages of heat pipe phase change air cooling are low cost, but its disadvantages include large size, high fan noise, low heat dissipation efficiency, and significant susceptibility to gravity. Liquid cooling offers high heat dissipation efficiency and small size, but is costly. Thermoelectric cooling offers high heat dissipation efficiency and low noise, but is also costly and large. Another existing technology involves placing a convection fan inside the glow wheel casing. The fan creates a pressure difference, generating air circulation within the glow wheel's cavity, and using air convection to dissipate heat. This method offers high heat dissipation efficiency, but increases the size of the glow wheel casing, resulting in a large heat dissipation volume and higher noise levels.

[0064] Therefore, there is an urgent need for a heat dissipation device with high heat dissipation efficiency and small size to dissipate heat from the fluorescent wheel in order to reduce the operating temperature of the fluorescent wheel.

[0065] In view of this, the laser display device of this application embodiment has a heat spreader directly attached to the phosphor wheel. The heat spreader is used to directly absorb the heat generated by the phosphor wheel, ensuring that the heat can be quickly transferred to other components of the heat sink while directly dissipating heat. The heat sink fins are used to increase the heat dissipation area, dissipating heat to the surrounding environment through natural convection or fan-assisted convection. The heat sink configuration shortens the heat transfer path, allowing the heat from the phosphor wheel to be directly conducted from the heat spreader to the heat sink fins for dissipation, avoiding heat conduction between multiple media, resulting in lower thermal resistance, improved heat dissipation efficiency of the phosphor wheel, and reduced overall size of the heat sink.

[0066] To make the objectives, implementation methods and advantages of this application clearer, the exemplary implementation methods of this application will be clearly and completely described below with reference to the accompanying drawings of the exemplary embodiments of this application. Obviously, the described exemplary embodiments are only some embodiments of this application, and not all embodiments.

[0067] It should be noted that the brief descriptions of terms in this application are only for the convenience of understanding the embodiments described below, and are not intended to limit the embodiments of this application. Unless otherwise stated, these terms should be understood in their ordinary and common meaning.

[0068] Furthermore, the terms “comprising” and “having”, and any variations thereof, are intended to cover but not exclusively include, for example, a product or device that includes a series of components is not necessarily limited to those that are explicitly listed, but may include other components that are not explicitly listed or that are inherent to such product or device.

[0069] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", 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 application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0070] The terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0071] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0072] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0073] refer to Figures 1-3 This application provides a laser display device, including a light source for emitting excitation light.

[0074] It also includes a fluorescent wheel 01, which can absorb and convert excitation light from the light source to form a laser-induced light.

[0075] It also includes a heat sink, which includes a heat spreader 100, and the first surface of the heat spreader 100 may be provided with a fixing part 110.

[0076] The heat sink also includes heat dissipation fins 200, which can be disposed on the second surface of the heat spreader 100.

[0077] The heat sink also includes a mounting part 011 on the fluorescent wheel 01, which can be located on the back of the fluorescent wheel 01.

[0078] The mounting part 011 can be connected to the fixing part 110 and fit against the first surface of the heat spreader 100.

[0079] It is understood that the heat spreader 100 is used to directly absorb the heat generated by the glow wheel 01, ensuring that the heat can be quickly transferred to other components of the heat sink while dissipating heat; the fixing part 110 is disposed on the first surface of the heat spreader 100, used to connect the heat spreader 100 to other components, providing structural stability; the heat dissipation fins 200 are used to increase the heat dissipation area, dissipating heat to the surrounding environment through natural convection or fan-assisted convection; the mounting part 011 is disposed on the back of the glow wheel 01, used to fix the glow wheel 01 to the heat spreader, and the mounting part 011 is connected to the fixing part 110 to ensure the stable fixation of the glow wheel 01.

[0080] During use, the fluorescent wheel 01 generates a lot of heat during operation. The mounting part 011 is attached to the first surface of the heat spreader 100 through the fixing part 110 to ensure that the heat can be quickly transferred to the heat spreader 100. The heat spreader 100 distributes the heat evenly to avoid local overheating. While the heat spreader 100 itself dissipates heat, it also dissipates the remaining heat to the surrounding environment through the heat dissipation fins 200 on its second surface.

[0081] In the prior art, the fluorescent wheel of the laser display device is fixed inside the light source housing using a fluorescent wheel bracket. The metal housing around the fluorescent wheel is part of the light source housing, and high thermal conductivity materials such as copper and aluminum are used to absorb heat in close contact with the light source housing around the fluorescent wheel.

[0082] That is, the heat dissipation path of the existing fluorescent wheel is as follows:

[0083] Phosphor wheel → Air → Light source housing → Thermally conductive interface material → Heat sink substrate → Heat sink fins → Outside cold air. Compared with the prior art, the embodiment of this application directly mounts the phosphor wheel 01 on the heat dissipation plate 100 (which is equivalent to the heat dissipation surface of the phosphor wheel support, the heat sink housing, and the thermally conductive metal at the same time). The heat dissipation plate 100 absorbs the heat generated by the phosphor wheel 01 and quickly transfers the heat to the heat sink fins 200, shortening the heat transfer path and reducing thermal resistance.

[0084] Thermal resistance is a parameter that measures the ability of a material or system to conduct heat. It is similar to the role of resistance in a circuit, representing the resistance encountered by heat as it passes through the material or system. The higher the thermal resistance, the lower the efficiency of heat transfer; the lower the thermal resistance, the higher the efficiency of heat transfer.

[0085] That is, the heat dissipation path of the fluorescent wheel in this embodiment is as follows:

[0086] Fluorescent wheel 01 → Heat spreader 100 → Heat dissipation fins 200 → Outside cold air.

[0087] In summary, the use of the heat spreader 100 ensures rapid and uniform heat distribution, preventing localized overheating from affecting the operation of the phosphor wheel 01. The heat spreader 100 directly contacts the phosphor wheel 01 for heat dissipation, reducing the operating temperature of the phosphor wheel 01. By directly mounting the phosphor wheel 01 on the heat spreader 100, the heat transfer path is shortened, and the remaining heat of the phosphor wheel 01 can be directly conducted from the heat spreader 100 to the heat dissipation fins 200 for heat dissipation, avoiding heat conduction between multiple media, resulting in lower thermal resistance, improved heat dissipation efficiency of the phosphor wheel 01, further reducing the operating temperature of the phosphor wheel 01, and reducing the overall size of the heat sink. Due to the improved heat dissipation efficiency, the reliance on high-power fans can be reduced, thereby reducing noise. Through effective thermal management, device failures caused by overheating are reduced, improving the reliability of the laser display device.

[0088] It should be noted that the vapor chamber 100 is a highly efficient heat transfer device, and its working principle is mainly based on the phase change heat transfer mechanism. The vapor chamber mainly consists of a shell, a liquid wick, a working fluid (usually pure water), and support pillars. The shell is usually made of a highly thermally conductive material (such as copper), and has a micro-structured capillary wick inside to support the working fluid and promote liquid reflux.

[0089] When heat is conducted from the external high-temperature zone to the evaporation zone of the heat spreader, the working fluid (pure water) in the wick near the heat source rapidly absorbs heat and vaporizes into steam. This process absorbs a large amount of heat energy, causing the working fluid volume to expand rapidly. Under the influence of pressure difference, the vaporized steam rapidly diffuses from the high-pressure zone (high-temperature zone) to the low-pressure zone (low-temperature zone). During the diffusion process, the steam carries a large amount of heat energy, thus achieving rapid heat transfer. When the steam diffuses to the condensation zone and comes into contact with the cooler inner wall, it quickly condenses into liquid. This condensation process releases the heat accumulated during the previous evaporation, thus achieving effective heat dissipation. The condensed coolant, under the capillary action of the wick, flows back to the evaporation zone along the microstructure, reabsorbs heat, and vaporizes into steam again. This process repeats continuously, forming a continuous heat conduction cycle.

[0090] refer to Figure 4 In some possible embodiments, the heat spreader 100 has heat dissipation protrusions 130, which are evenly distributed on the side of the heat spreader 100 near the fluorescent wheel 01.

[0091] Specifically, the heat dissipation protrusion 130 and the heat dissipation plate 100 are integrally formed.

[0092] The use of heat dissipation protrusions 130 increases the contact area between the heat spreader 100 and the heat source. This allows for heat transfer not only through direct contact between the heat spreader 100 and the glow wheel 01, but also through contact between the heat dissipation protrusions 130 and the heat dissipated from the glow wheel 01 into the air. This increased contact area with the air improves heat absorption and transfer efficiency. Optimized heat distribution reduces thermal resistance, improves overall heat dissipation efficiency, and lowers the operating temperature of the glow wheel 01.

[0093] refer to Figures 5-6 In some possible embodiments, the heat sink may include a first heat pipe 300.

[0094] The first end of the first heat pipe 300 can be connected to the heat spreader 100, and the second end of the first heat pipe 300 can be connected to the heat dissipation fins 200.

[0095] In some possible embodiments, the heat spreader 100 is attached to and fixed to the heat sink 200 to ensure that the heat from the heat spreader 100 can be stably conducted to the heat sink 200.

[0096] In some embodiments, the heat spreader 100 and the heat dissipation fins 200 are connected by welding, which can ensure that the heat spreader 100 and the heat dissipation fins 200 fit together and are tightly connected.

[0097] It is known that the heat spreader 100 directly absorbs the heat generated by the fluorescent wheel 01 and distributes it evenly. The design of the heat spreader 100 ensures that the heat can be quickly transferred from the fluorescent wheel 01 to other heat dissipation components. The first end of the first heat pipe 300 is connected to the heat spreader 100 to ensure that the heat can be quickly transferred from the heat spreader 100 to the first heat pipe 300. The second end of the first heat pipe 300 is connected to the heat dissipation fins 200 to ensure that the heat can be transferred from the first heat pipe 300 to the heat dissipation fins 200.

[0098] Compared to using only a heat spreader 100 and heat sink 200, where heat is dissipated by slowly diffusing from the heat spreader 100 to the cold end of the heat sink 200, using a first heat pipe 300 allows the heat on the heat spreader 100 to be directly transferred to the cold end of the heat sink 200 for dissipation, thus resulting in higher heat dissipation efficiency.

[0099] It should be noted that the hot end of the heat sink fin 200 refers to the part that is in direct contact with the heat source. In this embodiment, it refers to the area where the heat sink fin 200 is connected to the heat spreader 100.

[0100] The cold end of the heat dissipation fin 200 refers to the part that is away from the heat source and in contact with the ambient air. In the embodiments of this application, it refers to the end of the heat dissipation fin 200 that is away from the heat spreader 100.

[0101] Therefore, heat is directly transferred from the fluorescent wheel 01 to the heat spreader 100, and then to the heat dissipation fins 200 through the first heat pipe 300, avoiding heat conduction between multiple media. By shortening the heat transfer path, thermal resistance is reduced, the overall heat dissipation efficiency is improved, and the operating temperature of the fluorescent wheel 01 is reduced. Due to the optimization of the heat transfer path and the efficient heat distribution of the heat spreader, the need for large heat dissipation components is reduced, thereby reducing the overall size of the device.

[0102] To ensure the heat transfer efficiency at the connection between the first end of the first heat pipe 300 and the heat spreader 100, the first end of the first heat pipe 300 can be flattened, or a square pipe can be used for the first heat pipe 300, so as to maximize the contact area between the first end of the first heat pipe 300 and the heat spreader 100.

[0103] It should be noted that the first heat pipe 300 is a heat transfer element with high thermal conductivity. It transfers heat through the evaporation and condensation of liquid within a fully enclosed vacuum tube, utilizing fluid principles such as capillary action to achieve a cooling effect similar to that of a refrigerator compressor. The first heat pipe 300 consists of a tube shell, a liquid wick, and end caps. After the tube is evacuated to a negative pressure, it is filled with an appropriate amount of working liquid, filling the capillary porous material of the liquid wick that is tightly attached to the inner wall of the tube with liquid, and then sealed. One end of the tube is the evaporation section (heating section, which in this embodiment is the end closer to the heat spreader 100), and the other end is the condensation section (cooling section, which in this embodiment is the end farther from the heat spreader 100). When one end of the first heat pipe 300 is heated by heat transfer through the heat spreader 100, the liquid in the liquid wick evaporates and vaporizes. The vapor flows to the other end (the end farther from the heat spreader 100) under a small pressure difference, releasing heat and condensing into liquid. The liquid then flows back to the evaporation section along the porous material by capillary action. In this cyclical process, the first heat pipe 300 involves the following six interrelated main processes in achieving this heat transfer:

[0104] (1) Heat is transferred from the heat spreader 100 through the wall of the first heat pipe 300 and the liquid wick filled with working liquid to the (liquid-vapor) interface;

[0105] (2) The liquid evaporates at the (liquid-vapor) interface in the evaporation section, absorbing heat;

[0106] (3) Steam flows from the evaporation section to the condensation section;

[0107] (4) Steam condenses and dissipates heat at the vapor-liquid interface in the condensation section;

[0108] (5) Heat is transferred from the (vapor-liquid) interface to the cold source (heat dissipation fins 200 and air) through the wick, liquid and pipe wall;

[0109] (6) The working liquid after condensation flows back to the evaporation section due to capillary action in the liquid suction core.

[0110] In some possible embodiments, at least a portion of the first heat pipe 300 may be inserted into the heat dissipation fins 200.

[0111] In the thickness direction of the heat spreader 100, the ratio of the length of the first heat pipe 300 passing through the heat dissipation fin 200 to the height of the heat dissipation fin 200 is greater than or equal to 0.5.

[0112] If the ratio of the length of the first heat pipe 300 inserted in the heat dissipation fin 200 to the height of the heat dissipation fin 200 is greater than or equal to 0.5, it indicates that the first heat pipe 300 can carry heat to the heat dissipation fin 200 along the height direction for heat dissipation, thereby improving heat dissipation efficiency.

[0113] For example, the ratio of the length of the first heat pipe 300 inserted in the heat dissipation fin 200 to the height of the heat dissipation fin 200 can be set to any ratio within the range of 0.5-0.6, 0.7-0.8, 0.9-1.0, or 1.1-1.2, so that heat can be dissipated more effectively by the heat dissipation fin 200 along the height direction.

[0114] For example, the ratio of the length of the first heat pipe 300 passing through the heat dissipation fin 200 to the height of the heat dissipation fin 200 is set to 1.1-1.2, indicating that at least a portion of the first heat pipe 300 penetrates the top surface of the heat dissipation fin 200. Heat can be dissipated along the first heat pipe 300 by fully utilizing the space in the height direction of the heat dissipation fin 200, allowing the fins in the height direction of the heat dissipation fin 200 to fully participate in heat dissipation and improve heat dissipation efficiency.

[0115] In some possible implementations, in lower-power laser display devices, the optical power of the phosphor wheel 01 is also lower, and the heat generated by the phosphor wheel 01 emitting fluorescence after receiving laser light is also less. The heat spreader 100 and the heat dissipation fins 200 are integrally formed, which reduces costs while ensuring heat dissipation efficiency. In this case, the heat spreader 100 and the heat dissipation fins are integrally formed, and the manufacturing process of the heat spreader 100 and the heat dissipation fins 200 can adopt processes such as die casting, extrusion, CNC, forging, etc. The embodiments of this application do not impose too many restrictions on this.

[0116] In some possible embodiments, the first heat pipe 300 may be located on the outside of the heat dissipation fins 200.

[0117] In the thickness direction of the heat spreader 100, the ratio of the distance between the second end of the first heat pipe 300 and the heat spreader 100 to the height of the heat dissipation fins 200 is greater than or equal to 0.5.

[0118] With the ratio of the distance between the first heat pipe and the heat spreader 100 to the height of the heat dissipation fins 200 being greater than or equal to 0.5, heat can be transferred more effectively to the outer area of ​​the heat dissipation fins 200, improving the efficiency of heat diffusion and dissipation.

[0119] For example, in the thickness direction of the heat spreader 100, the ratio of the distance between the second end of the first heat pipe 300 and the heat spreader 100 to the height of the heat dissipation fins 200 can be set to any one of the following ratios: 0.5-0.6, 0.7-0.8, 0.9-1.0, 1.1-1.2, so that the outer area of ​​the heat dissipation fins 200 can fully participate in heat dissipation and improve heat dissipation efficiency.

[0120] In some possible embodiments, the first heat pipe 300 may be inserted through the heat spreader 100, and the first end of the first heat pipe 300 may extend out of the first surface of the heat spreader 100.

[0121] Alternatively, the first end of the first heat pipe 300 can be flush with the first surface of the heat spreader 100.

[0122] It is known that the first heat pipe 300 passes through the heat spreader 100 and extends out of the first surface of the heat spreader 100. This design can increase the contact area between the first heat pipe 300 and the heat source generated by the fluorescent wheel on one side of the first surface of the heat spreader 100, so that the first heat pipe 300 can not only transfer the heat of the heat spreader 100 to the heat dissipation fins 200, but also directly transfer the heat of the fluorescent wheel 01 to the heat dissipation fins 200.

[0123] Therefore, by inserting the first heat pipe 300 into the heat spreader 100 and extending it out of its surface, the first heat pipe 300 can not only transfer the heat of the heat spreader 100, but also absorb the heat of the air around the fluorescent wheel 01, thereby improving the overall heat transfer efficiency and reducing the operating temperature of the fluorescent wheel 01. The first end of the first heat pipe 300 can be selected to extend or be flush with the surface according to specific needs, providing design flexibility to adapt to different heat dissipation needs and structural requirements. Due to the optimization of the heat transfer path and the efficient heat distribution of the heat spreader, the need for large heat dissipation components is reduced, thereby reducing the overall size of the device.

[0124] Specifically, the connection between the first heat pipe 300 and the heat spreader 100 is sealed to prevent dust from affecting the operation of the fluorescent wheel 01 and to avoid problems such as light decay.

[0125] refer to Figures 7-9 In some possible embodiments, the first end of the first heat pipe 300 may be connected to the fixing part 110.

[0126] And / or, the first end of the first heat pipe 300 may contact the mounting part 011.

[0127] It is known that the mounting part 011 of the fluorescent wheel 01 is close to the main heat-generating part of the fluorescent wheel 01. Therefore, the first end of the first heat-conducting pipe 300 is connected to the fixing part 110, and / or the first end of the first heat-conducting pipe 300 is in contact with the mounting part 011, so that the first heat-conducting pipe 300 can directly contact the part of the fluorescent wheel 01 with the highest heat, thereby improving the heat conduction efficiency.

[0128] In this way, by connecting the first heat pipe 300 to the fixing part 110, the stability of the first heat pipe 300 in the mechanical structure is ensured. It not only provides physical support, but also allows direct heat transfer through the fixing part 110. The first heat pipe 300 is in direct contact with the high-temperature area of ​​the fluorescent wheel 01, so that heat can be quickly transferred to the first heat pipe 300, reducing heat loss during the transfer process, improving heat dissipation efficiency, and lowering the operating temperature of the fluorescent wheel 01. The connection method of the first heat pipe 300 can be selected according to specific needs to optimize the heat dissipation path and structural stability. By reducing thermal resistance and optimizing the heat transfer path, the risk of overheating is reduced and the long-term stability of the system is improved.

[0129] Specifically, the first end of the first heat pipe 300 can be flattened to ensure that the contact surface between the first heat pipe 300 and the fluorescent wheel 01 is maximized.

[0130] refer to Figure 12 In some possible embodiments, the first heat pipe 300 may be integrally formed with the heat spreader 100.

[0131] A first flow channel 120 may be provided inside the heat spreader 100, and a second flow channel 310 may be provided inside the first heat pipe 300. The first flow channel 120 may be connected to the second flow channel 310.

[0132] Specifically, there are multiple first heat pipes 300, and the first heat pipes 300 are arranged perpendicularly to the heat spreader 100.

[0133] It is known that the first heat pipe 300 is integrally formed with the heat spreader 100, and the second flow channel 310 is connected to the first flow channel 120, forming an integrated heat transfer system. The heat generated by the fluorescent wheel 01 during operation is absorbed by the heat spreader 100 and transferred to the second flow channel 310 through the first flow channel 120, forming a fluid circulation system that enhances heat transfer efficiency. The fluid circulates in the flow channels, carrying away heat and transferring it to the heat dissipation fins 200, thereby achieving efficient thermal management.

[0134] It should be noted that because the heat spreader 100 has evaporation and condensation sections, the heat dissipation path can have multiple possible distributions depending on the design location. In this case, the heat spreader 100 can be regarded as a two-dimensional heat transfer device, and the heat dissipation path is still confined to the same plane. The heat dissipation path of the first heat pipe 300 is also within the same fixed path. When the second flow channel 310 (the liquid absorption core of the first heat pipe 300) of the first heat pipe 300 is connected to the first flow channel 120 of the heat spreader 100 (the liquid absorption core of the heat spreader 100), the heat spreader 100 and the first heat pipe 300 form a three-dimensional heat conduction path.

[0135] The heat dissipation effect of a non-connected heat spreader 100 and first heat pipe 300 is limited because the thermal resistance increases with the heat conduction distance. In contrast, when the first heat pipe 300 extends into the body of the heat spreader 100, the internal cavity is connected, and the working fluid is circulated back through the capillary heat absorption core, completing the circulating heat conduction. The heat spreader 100, the first heat pipe 300, and the heat dissipation fins 200 together form the entire heat sink, enabling the heat sink to achieve multi-dimensional heat dissipation, including horizontal and vertical dimensions.

[0136] With the above configuration, when dealing with the heat generated by high-power devices like the fluorescent wheel 01, more heat sources can be contacted, providing more heat dissipation paths. The heat generated by the fluorescent wheel 01 is transferred to the heat spreader 100 and the first heat pipe 300, and then quickly transferred to the entire first flow channel 120 and the second flow channel 310. The first flow channel 120 and the second flow channel 310 have large spaces, and the vapor in the first flow channel 120 and the second flow channel 310 can directly reach the condensation end of the first heat pipe 300, reducing the thermal resistance from the heat spreader 100 to the first heat pipe 300. This also allows the heat generated by the fluorescent wheel 01 to be transferred to the heat dissipation fins 200 more quickly, improving the overall heat dissipation efficiency and reducing the operating temperature of the fluorescent wheel 01. Furthermore, it is suitable for small and irregular spaces, reducing the overall size of the device.

[0137] refer to Figure 11 In some possible embodiments, the heat dissipation fins 200 may be disposed on the second surface of the heat spreader 100, but not connected to the heat spreader 100. In this case, the heat conducted by the heat spreader 100 can be transferred to the heat dissipation fins 200 through the first heat pipe 300 for further heat dissipation.

[0138] In some possible embodiments, the heat sink may include a second heat pipe 400, which may be disposed within the heat sink fins 200.

[0139] The first end of the second heat pipe 400 is close to the heat spreader 100, and the second end of the second heat pipe 400 is far away from the heat spreader 100.

[0140] It is known that the first end of the second heat pipe 400 is close to the heat spreader 100, so that the first end of the second heat pipe 400 can absorb the heat transferred from the heat spreader 100, and the second end of the second heat pipe 400 is far away from the heat spreader 100, so that the heat can be transferred to the cold end of the heat dissipation fins 200 and the heat dissipation efficiency is increased.

[0141] The heat generated by the fluorescent wheel 01 during operation is first absorbed and evenly distributed by the heat spreader 100. On the one hand, the heat of the heat spreader 100 can be dissipated through the heat dissipation fins 200. On the other hand, the second heat pipe 400 quickly transfers a portion of the heat of the heat spreader 100 from the hot end to the cold end of the heat dissipation fins 200. Compared with the heat of the heat spreader 100, which needs to slowly diffuse from the hot end to the cold end of the heat dissipation fins 200, the heat dissipation efficiency is greatly improved.

[0142] In this way, by inserting the second heat pipe 400 into the heat dissipation fins 200, the heat transfer path is shortened, thermal resistance is reduced, the overall heat dissipation efficiency is improved, and the operating temperature of the fluorescent wheel 01 is lowered. The design of the second heat pipe 400 ensures that heat can be evenly distributed to all parts of the heat dissipation fins 200, avoiding local overheating and improving the heat dissipation effect. By optimizing the heat conduction path, the need for large heat dissipation components is reduced, thereby reducing the overall size of the device. The more effective thermal management system reduces device failures caused by overheating and improves the reliability of the laser display device.

[0143] In some possible embodiments, the fluorescent wheel 01 may be provided with a driving member 012, which can drive the fluorescent wheel 01 to rotate. The driving member 012 may be provided on the back of the fluorescent wheel 01 through the mounting part 011.

[0144] As can be seen from the working principle of the fluorescent wheel 01, the operation of the fluorescent wheel 01 requires high-speed rotation to ensure continuous color switching and form a continuous color image. Therefore, the driving component 012 is an important component that drives the rotation of the fluorescent wheel 01. The high-speed rotation of the driving component 012 will generate a lot of heat, so it needs to be dissipated through a heat sink.

[0145] The drive component 012 is mounted on the back of the fluorescent wheel 01 via the mounting part 011. The mounting part 011 provides a stable connection point to ensure that the drive component 012 can effectively transmit power to the fluorescent wheel 01.

[0146] Therefore, the tight connection between the drive component 012 and the fluorescent wheel 01 ensures stability during high-speed rotation and reduces vibration and mechanical wear; by mounting the drive component 012 on the back of the fluorescent wheel 01, internal space of the device is saved, which helps to reduce the overall size.

[0147] It should be noted that the driving component 012 can be an electric motor that provides smooth rotation and precise speed control; it can also be a synchronous motor, which operates at a fixed frequency and is suitable for applications requiring synchronized speeds to ensure that the fluorescent wheel 01 works in coordination with other system components; or it can be a servo motor, which provides high-precision speed and position control and is suitable for applications requiring precise control of the rotation speed of the fluorescent wheel 01. As long as the driving component 012 can stably drive the fluorescent wheel 01 to rotate at high speed, this embodiment of the application does not impose any special limitations on the type of driving component 012.

[0148] In some possible embodiments, a mounting gap 111 may be formed between the fixing part 110 and the heat spreader 100, and at least a portion of the mounting part 011 may be located within the mounting gap 111.

[0149] The mounting part 011 may be provided with a locking position 013, and the mounting part 011 may be connected to the fixing part 110 through the locking position 013.

[0150] In some embodiments, the fixing part 110 is integrally disposed with the heat dissipation plate 100, so that the fixing part 110 can be in close contact with the fluorescent wheel 01 while ensuring heat dissipation conduction of the maximum contact area.

[0151] The mounting gap 111 is the space between the fixed part 110 and the heat spreader 100, which is equivalent to the clearance of the drive component 012 at the mounting position of the fixed part 110. The mounting gap 111 provides a flexible mounting position for the mounting part 011. The drive component 012 is connected to the fixed part 110 through the mounting part 011. The drive component 012 is the main heat-generating component of the fluorescent wheel 01. The mounting part 011 is located within the mounting gap 111 to ensure a stable mechanical connection and efficient heat conduction. The locking position 013 is used to connect the mounting part 011 to the fixed part 110. The locking position 013 provides a firm mechanical connection to prevent the fluorescent wheel 01 from loosening during rotation.

[0152] By providing an installation gap 111 in the fixing part 110, the fluorescent wheel 01 can be tightly connected to the fixing part 110, and heat can be quickly transferred from the fluorescent wheel 01 to the heat spreader 100 and further to the heat sink, improving the overall heat dissipation efficiency. The design of the locking position 013 ensures a stable connection between the mounting part 011 and the fixing part 110, reducing vibration and displacement and improving the stability of the system. The design of the installation gap 111 allows for a more flexible component layout, saving space inside the device and helping to reduce the overall volume. Due to the structural stability and efficient heat transfer, the reliance on high-power fans can be reduced, thereby reducing noise.

[0153] refer to Figure 10In some embodiments, the mounting part 011 and the fixing part 110 are connected by screws, the locking position 013 is a screw hole, and the heat spreader 100 and the fixing part 110 are respectively provided with mounting screw holes 140.

[0154] Specifically, the heat sink 200 has a mounting hole 210 reserved at the corresponding locking position 013.

[0155] During the installation process, the bolt is inserted from the side of the heat sink fin 200 away from the heat spreader 100 along the mounting hole 210, so that the bolt is aligned with the mounting hole 210. The bolt passes through the mounting hole 210, the mounting screw hole 140 and the locking position 013 in sequence, and the mounting part 011 and the fixing part 110 are tightly fixed.

[0156] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

[0157] For ease of explanation, the above description has been provided in conjunction with specific embodiments. However, the above exemplary discussion is not intended to be exhaustive or to limit the embodiments to the specific forms disclosed above. Various modifications and variations can be obtained based on the above teachings. The selection and description of the above embodiments are for the purpose of better explaining the principles and practical applications, thereby enabling those skilled in the art to better utilize the described embodiments and various different variations of embodiments suitable for specific use considerations.

Claims

1. A laser display device, characterized in that, include: A light source used to emit excitation light; A fluorescent wheel that absorbs and converts excitation light from the light source to form a laser-induced emission. Radiator, the radiator comprising: A heat spreader, wherein a fixing part is provided on the first surface of the heat spreader; Heat dissipation fins are disposed on the second surface of the heat spreader; The fluorescent wheel is provided with a mounting part, which is located on the back of the fluorescent wheel; the mounting part is connected to the fixing part and is attached to the first surface of the heat spreader.

2. The laser display device according to claim 1, characterized in that, The heat sink includes: A first heat pipe, the first end of which is connected to the heat spreader, and the second end of which is connected to the heat dissipation fins.

3. The laser display device according to claim 2, characterized in that, At least a portion of the first heat pipe passes through the heat dissipation fins; In the thickness direction of the heat spreader, the ratio of the length of the first heat pipe passing through the heat dissipation fin to the height of the heat dissipation fin is greater than or equal to 0.

5.

4. The laser display device according to claim 2, characterized in that, The first heat pipe is located on the outside of the heat dissipation fins; In the thickness direction of the heat spreader, the ratio of the distance between the second end of the first heat pipe and the heat spreader to the height of the heat dissipation fins is greater than or equal to 0.

5.

5. The laser display device according to claim 2, characterized in that, The first heat pipe passes through the heat spreader plate, and the first end of the first heat pipe extends out of the first surface of the heat spreader plate, or the first end of the first heat pipe is flush with the first surface of the heat spreader plate.

6. The laser display device according to claim 5, characterized in that, The first end of the first heat-conducting pipe is connected to the fixing part; and / or, the first end of the first heat-conducting pipe is in contact with the mounting part.

7. The laser display device according to claim 2, characterized in that, The first heat pipe is integrally formed with the heat spreader. The heat spreader is provided with a first flow channel, and the first heat pipe is provided with a second flow channel. The first flow channel and the second flow channel are connected.

8. The laser display device according to claim 1, characterized in that, The heat sink includes: The second heat pipe is inserted into the heat dissipation fins; the first end of the second heat pipe is close to the heat spreader, and the second end of the second heat pipe is away from the heat spreader.

9. The laser display device according to any one of claims 1-8, characterized in that, The fluorescent wheel is provided with a driving component, which can drive the fluorescent wheel to rotate. The driving component is disposed on the back of the fluorescent wheel through the mounting part.

10. The laser display device according to any one of claims 1-8, characterized in that, An installation gap is formed between the fixing part and the heat dissipation plate, and at least a portion of the mounting part is located within the installation gap; The mounting part is provided with a locking position, and the mounting part is connected to the fixing part through the locking position.

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