Fluorescence excitation device and assembly structure

Abstract

The utility model relates to the technical field of light source devices, in particular to a fluorescence excitation device and an assembly structure, and the fluorescence excitation device is provided with a partition piece used for being connected with a power mechanism and insulating heat. The fluorescence excitation device is connected with the power mechanism through the heat-insulating partition piece, so that heat generated when the fluorescence conversion layer is excited to convert fluorescence is not conducted to the power mechanism, the power mechanism is effectively protected, the power mechanism can stably work in a safe temperature range for a long time, and the service life of the power mechanism is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of light source devices, in particular to a fluorescence excitation device and an assembly structure. Background Art

[0002] Common light source systems used in projection systems include fluorescence excitation systems, which employ excitation light to illuminate fluorescent devices to stimulate fluorescence, and then use the devices to spectrally control and combine the fluorescence. These systems are widely used in light source modules, primarily those based on digital light processing (DLP) projection systems, three-chip liquid crystal display (3LCD) systems, and three-chip liquid crystal on silicon (3LCOS) projection systems. When excitation light illuminates a fluorescent device, a portion of the excitation light undergoes wavelength conversion and becomes fluorescent light. Meanwhile, a portion of the excitation light energy causes the fluorescent device to heat up. If this heat cannot be effectively dissipated, it can overheat, affecting the device's fluorescence excitation efficiency and the amount of light emitted. Conventional technology typically utilizes a thermally conductive material to dissipate heat for the fluorescent device's substrate. However, the substrate is connected to a drive mechanism that activates the fluorescent device, allowing heat to be transferred to the drive mechanism, impacting its stability and lifespan, and thus the projector's brightness and lifespan. Utility Model Content

[0003] The technical problem to be solved and the technical task proposed by the present invention are to improve the existing technology and provide a fluorescent excitation device to solve the problem in the current technology that the heat of the fluorescent device will be conducted to the driving mechanism, affecting the working stability and service life of the driving mechanism.

[0004] In order to solve the above technical problems, the technical solution of the utility model is:

[0005] A fluorescence excitation device comprises a substrate, a fluorescence conversion layer, and a spacer. The substrate is made of a thermally conductive material, the fluorescence conversion layer is disposed on the substrate, and the substrate is connected to a spacer for connection to a power mechanism. The spacer is made of a thermally insulating material. The fluorescence excitation device of the present invention is connected to the power mechanism via the thermally insulating spacer. When the fluorescence conversion layer is excited by irradiation to produce fluorescence, the heat generated by the fluorescence conversion layer is transferred to the substrate, but the heat cannot be transferred to the power mechanism through the thermally insulating spacer. This effectively protects the power mechanism, allowing it to operate stably and long-term within a safe temperature range, thereby extending its service life.

[0006] Furthermore, the substrate is annular, and the spacer is connected to the inner circle of the substrate by adhesive, which has a compact structure and occupies a small volume. The overall thickness of the fluorescence excitation device is thin and light.

[0007] Furthermore, blades distributed along the circumference are provided on one side surface or both sides of the partition;

[0008] And / or, the fluorescent conversion layer is provided on one side surface of the substrate, and blades distributed along a circumference are provided on the other side surface of the substrate.

[0009] Blades are provided on the substrate and / or the partition, so that when the power mechanism drives the fluorescent excitation device to move, the blades can be used for active heat dissipation. The blades stir the air to form a continuously flowing airflow, and thus can better dissipate the heat generated by the fluorescent conversion layer outward by convection, avoiding heat accumulation on the substrate and causing excessive temperature, thereby ensuring that the fluorescent conversion layer also works at an appropriate temperature state, ensuring the fluorescent excitation efficiency, and ensuring the fluorescent output brightness.

[0010] Furthermore, the outer diameter of the area occupied by the blades on the substrate is smaller than or equal to the inner diameter of the area occupied by the fluorescent conversion layer.

[0011] Furthermore, the blades are arc-shaped, which is conducive to forming a stable airflow for heat dissipation and ensuring heat dissipation efficiency.

[0012] Furthermore, a hollow area is formed between the blades provided on the spacer, and the spacer further includes a ring provided on the radial inner side of the blade and / or the radial outer side of the blade.

[0013] Furthermore, the thickness of the radial inner side of the spacer is smaller than the thickness of the radial outer side of the spacer.

[0014] Furthermore, the spacer is a tapered piece.

[0015] Furthermore, the density of the spacer is lower than that of the substrate, which reduces the weight of the fluorescent excitation device, lowers the driving power consumption, and reduces the noise when the fluorescent excitation device rotates.

[0016] Furthermore, the fluorescence conversion layer includes a wavelength conversion region of at least one color, which can be flexibly arranged according to the needs of the light source system, and the fluorescence excitation device can generate fluorescence of at least one color under the irradiation of the excitation light.

[0017] Furthermore, the fluorescent conversion layer includes one or more wavelength conversion zones distributed along the circumference, and the colors of the wavelength conversion zones are the same or different. The fluorescent conversion layer is set according to the specific color light required by the projection light source, which can improve the brightness of the light output or the vividness of the projection image.

[0018] Furthermore, the fluorescent conversion layer is formed on the substrate by printing, dotting or spraying, which is convenient and efficient to process and can form a fluorescent conversion layer with a stable thin layer structure, good excitation efficiency and small occupied volume.

[0019] A fluorescence excitation device assembly structure comprises a motor and the above-mentioned fluorescence excitation device, wherein the spacer of the fluorescence excitation device is connected to the output shaft of the motor, and the motor is connected to the optical machine housing through the back plate of the motor.

[0020] Furthermore, a heat dissipation portion is provided on the optical machine housing.

[0021] Compared with the prior art, the advantages of this utility model are:

[0022] The fluorescent excitation device and assembly structure described in the present invention are connected to the power mechanism through a heat-insulating partition, so that the heat generated when the fluorescent conversion layer is excited to convert fluorescence will not be conducted to the power mechanism, thereby effectively protecting the power mechanism, allowing the power mechanism to work stably and effectively within a safe temperature range for a long time, thereby extending its service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the overall structure of a projector of the present utility model;

[0024] Figure 2 This is a schematic diagram of the cross-sectional structure of a fluorescence excitation device of the present invention;

[0025] Figure 3 This is a schematic diagram of the front structure of a fluorescence excitation device of the present invention;

[0026] Figure 4 This is a schematic cross-sectional view of another fluorescent excitation device of the present invention;

[0027] Figure 5 for Figure 4 Schematic diagram of the front side structure of the fluorescence excitation device shown;

[0028] Figure 6 This is a schematic diagram of the front structure of another fluorescent excitation device of the present invention;

[0029] Figure 7 for Figure 6 Schematic diagram of the rear side structure of the fluorescence excitation device shown;

[0030] Figure 8 This is a schematic diagram of the front structure of another fluorescent excitation device of the present invention;

[0031] Figure 9 for Figure 8 Schematic diagram of the rear side structure of the fluorescence excitation device shown;

[0032] Figure 10 A schematic cross-sectional view of an assembly structure of a fluorescence excitation device according to the present invention;

[0033] Figure 11 for Figure 10 Schematic diagram of the rear side structure of the fluorescence excitation device;

[0034] Figure 12 This is a schematic structural diagram of another fluorescence excitation device of the present utility model;

[0035] Figure 13 This is a schematic cross-sectional view of another assembly structure of a fluorescence excitation device of the present invention.

[0036] In the picture:

[0037] Substrate 1 , phosphor conversion layer 2 , spacer 3 , hollow area 31 , ring 32 , blades 4 , sleeve 5 , motor 6 , optical machine housing 7 , heat dissipation portion 71 . DETAILED DESCRIPTION

[0038] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0039] The fluorescent excitation device disclosed in the embodiment of the present utility model can effectively prevent the heat generated during excitation conversion from being conducted to the driving mechanism, thereby ensuring that the driving mechanism can operate stably and long-term within a safe temperature range and extending its service life.

[0040] like Figure 1 As shown, a fluorescence excitation device mainly includes a substrate 1, a fluorescence conversion layer 2 and a spacer 3. The fluorescence conversion layer 2 is arranged on the substrate 1 made of a heat-conducting material. When the fluorescence conversion layer 2 is irradiated with excitation light, the fluorescence conversion layer 2 will convert part of the excitation light into fluorescence. At the same time, part of the energy of the excitation light will cause the fluorescence conversion layer 2 to heat up. The substrate 1 is made of a heat-conducting material, so the heat on the fluorescence conversion layer 2 will be effectively conducted to the substrate 1, and then dissipated outward through the substrate 1, thereby avoiding the fluorescence conversion layer 2 from being too hot and ensuring the wavelength conversion efficiency. At the same time, the substrate 1 is also connected to a spacer 3 made of a heat-insulating material for connecting to a power mechanism. The substrate 1 is not directly connected to the power mechanism, and the substrate 1 and the power mechanism are indirectly connected through the heat-insulating spacer 3, so that the heat on the substrate 1 will not be conducted to the power mechanism, thereby effectively protecting the power mechanism, so that the power mechanism can work stably and effectively within a safe temperature range for a long time, thereby extending the service life.

[0041] like Figure 1In the embodiment shown, the substrate 1 is a metal circular plate as a whole, and specifically can be made of copper, silver and other materials with excellent thermal conductivity. The diameter of the metal circular plate is 40 to 130 mm and the thickness is 1 to 2 mm. A fluorescent conversion layer 2 is formed on one side surface of the substrate 1 by printing, dot coating or spraying. When the fluorescent excitation device is driven by a power mechanism to rotate, the area on which the excitation light irradiates the fluorescent conversion layer 2 is usually a circular ring. Therefore, preferably, the fluorescent conversion layer 2 is made into a ring shape, which reduces the production cost while improving the area utilization of the fluorescent conversion layer 2. The radial width of the ring-shaped fluorescent conversion layer 2 can be 3 to 10 mm and the thickness is 0.1 to 0.2 mm. It has a compact structure and occupies little space. Furthermore, the fluorescence conversion layer 2 can be a wavelength conversion area of ​​a single color that covers only a part of the circumference or the entire circumference. The fluorescence excitation device can be a static device, so that the excitation light is always irradiated on the same point, and the heat generation position is concentrated, which is not conducive to heat dissipation. It is easy for the temperature at a local position to be too high, thereby affecting the excitation conversion efficiency. Therefore, when the fluorescence excitation device is driven by a power mechanism such as a motor to perform dynamic activities, the excitation light can be irradiated at different positions of the fluorescence excitation device, avoiding the concentration of heat generation positions, which is conducive to heat dissipation, thereby better ensuring the excitation conversion efficiency. When there is only a wavelength conversion area of ​​a single color on the fluorescence excitation device, different positions of the wavelength conversion area can be irradiated during the movement of the fluorescence excitation device to produce fluorescence of the same color. The circumferential angle range covered by the wavelength conversion area can be 30 to 360°, which can be flexibly set according to the needs of light output. It can be time-sequential excitation to produce the required fluorescence, or it can be continuous excitation to produce the required fluorescence. Furthermore, the fluorescence conversion layer 2 may include multiple wavelength conversion regions of the same color distributed along a circumference, so that when the fluorescence excitation device is driven by a powered mechanism to rotate, the multiple wavelength conversion regions of the same color distributed along the circumference are sequentially illuminated by the excitation light, thereby obtaining a sequential emission of fluorescence of the same color. Furthermore, the fluorescence conversion layer 2 may include multiple wavelength conversion regions of different colors distributed along the circumference, so that when the fluorescence excitation device is driven by a powered mechanism to rotate, the multiple wavelength conversion regions of different colors distributed along the circumference are sequentially illuminated by the excitation light, thereby obtaining a sequential emission of fluorescence of different colors.

[0042] Further, such as Figure 1As shown, the spacer 3 is used to connect the fluorescence excitation device to the power mechanism and prevent heat from being transferred to the power mechanism. The spacer 3 is connected to the other side surface of the substrate 1. That is, the fluorescence conversion layer 2 and the spacer 3 are respectively located on the two side surfaces of the substrate 1. The spacer 3 and the substrate 1 can be connected by various means, such as screw locking, clamping, etc. In order to ensure convenient and stable connection and reduce the overall weight of the fluorescence excitation device, it is preferred that the substrate 1 and the spacer 3 are connected by adhesive, without the need for additional connecting devices, thereby avoiding the addition of additional weight, which is beneficial to reducing the rotational inertia of the fluorescence excitation device, thereby reducing driving power consumption and reducing the noise of the fluorescence excitation device during rotation. Specifically, the substrate 1 and the spacer 3 are connected by high-temperature organic adhesive. High-temperature organic adhesive has good high temperature resistance and can effectively prevent the substrate 1 and the spacer 3 from separating. It ensures the overall structural stability of the fluorescence excitation device and ensures that the desired fluorescence can be obtained with long-term stability. Furthermore, the density of the spacer 3 is less than that of the substrate 1, which reduces the weight of the fluorescence excitation device, helps reduce driving power consumption, and reduces the noise of the fluorescence excitation device during rotation.

[0043] Furthermore, blades 4 distributed along the circumference are provided on the substrate 1 and / or the spacer 3, so that when the fluorescent excitation device is driven to rotate by the power mechanism, the fluorescent excitation device itself will form a wind wheel, stirring the air to form a continuously flowing airflow, actively dissipating heat by convection, improving heat dissipation efficiency, and effectively dissipating the heat generated by the fluorescent conversion layer 2 to the outside to avoid heat accumulation, thereby ensuring that the entire fluorescent excitation device works in a suitable and stable state, ensuring wavelength conversion efficiency, and ensuring the brightness of the fluorescent light. Figure 2 and Figure 3As shown, blades 4 can be provided on the substrate 1 along a circumferential distribution, that is, the blades 4 are distributed along the rotational circumference of the fluorescence excitation device. Specifically, the blades 4 can be provided on the surface of the substrate 1 on the same side as the fluorescence conversion layer 2, and the blades 4 can be located radially outward and / or radially inward of the fluorescence conversion layer 2. When the fluorescence excitation device rotates, the blades 4 stir the air to form an airflow, which uses convection to dissipate heat from the fluorescence conversion layer 2 and the substrate 1. In addition, the blades 4 can also be provided on the other side of the substrate 1 opposite the fluorescence conversion layer 2. Similarly, when the fluorescence excitation device rotates, the blades 4 can stir the air to form an airflow, which can effectively dissipate heat from the fluorescence conversion layer 2 and the substrate 1 by convection. Furthermore, the blades 4 can be provided on the spacer 3 along a circumferential distribution. Similarly, the rotating blades 4 can be used to form an airflow to effectively dissipate heat from the fluorescence conversion layer 2 and the substrate 1. Preferably, the number of blades 4 distributed along the circumference of the substrate 1 and the spacer 3 is a prime number, which is conducive to ensuring the smooth rotation of the fluorescent excitation device. When the fluorescent excitation device rotates, the blades stir the air to form a stable airflow, thereby better ensuring the heat dissipation efficiency. Figure 3 As shown, the blades 4 are arc-shaped. Specifically, the blades 4 are arc-shaped lines inclined to the radial direction. The height of the blades 4 can be set to 0.5 to 1.2 mm. The structure is simple and easy to manufacture. When the fluorescent excitation device rotates, the blades 4 stir the air to form an airflow discharged radially outward, which can discharge the heat on the fluorescent excitation device radially outward in the entire circumference. The structure is simple and the heat dissipation efficiency is high.

[0044] like Figure 4 and Figure 5 In the embodiment shown, the substrate 1 is annular, and the spacer 3 is connected to the inner ring of the substrate 1. The outer diameter of the annular substrate 1 is 40 to 130 mm, the inner diameter is 30 to 80 mm, and the thickness is 1 to 2 mm. Correspondingly, the outer diameter of the spacer 3 is 30 to 80 mm. The substrate 1 and the spacer 3 are connected by adhesive, which has a simple structure and is easy to connect. There is no additional connecting component. Figure 2As for the structural scheme shown, it can effectively avoid increasing the thickness, thereby avoiding adding extra weight, which is beneficial to reducing the weight of the fluorescent excitation device, reducing the rotational inertia of the fluorescent excitation device, thereby reducing the driving power consumption, reducing the noise when the fluorescent excitation device rotates, and reducing the contact area between the substrate 1 and the partition 3, so as to better conduct the heat on the wall substrate 1 to the partition 3, improve the heat insulation effect, and better protect the power mechanism. The thickness of the partition 3 is equivalent to or thinner than the thickness of the substrate 1, and the thickness of the fluorescent conversion layer 2 arranged on the substrate 1 is 0.1 to 0.2 mm, so that the fluorescent excitation device as a whole is a thin plate structure with a compact structure and small space occupation. Preferably, the density of the partition 3 is less than the density of the substrate 1, and an inorganic or organic material with low thermal conductivity is used, preferably with a thermal conductivity of less than or equal to 0.8W / m*k and a thermal resistance of greater than or equal to 0.0076 (m 2 *K / W), such as ceramics, glass and other materials, to reduce the weight of the fluorescent excitation device and avoid heat conduction to the power mechanism. For example, when the spacer 3 is made of glass, the density of the glass is 2.4 to 2.8 g / cm 3 The substrate 1 can be made of aluminum alloy, the density of which is between 2.6 and 2.8 g / cm 3 . In a preferred embodiment, the thickness of the radial inner side of the spacer 3 is less than the thickness of the radial outer side of the spacer 3. First, it can reduce the weight of the spacer 3, which is beneficial to reducing the weight of the wavelength conversion device, reducing the moment of inertia, and reducing the driving power consumption. Moreover, the smaller the thickness of the radial inner side of the spacer 3, the better it can reduce the contact area, thereby reducing the heat conduction to the radial inner side of the spacer 3, better avoiding the heat conduction to the motor, and helping to better protect the motor. Furthermore, in order to facilitate the connection, a hole is opened in the center of the spacer 3 to connect with a shaft sleeve 5 for connecting to the motor. More specifically, the shaft sleeve 5 is connected to the spacer 3 by adhesive, and the shaft sleeve 5 is also connected to the output shaft of the motor by adhesive. It is easy to assemble, compact in structure, and does not add extra weight.

[0045] Further, such as Figure 6 and Figure 7 In the embodiment shown, the fluorescent conversion layer 2 is provided on one side surface of the substrate 1, and blades 4 distributed along the circumference are provided on the other side surface of the substrate 1. The thickness of the blades 4 is 0.5 to 1.2 mm, the blades 4 are arc-shaped, and the number of blades 4 distributed along the circumference is a prime number; Figure 4 and Figure 5 In the embodiment shown, the spacer 3 is provided with blades 4 distributed along the circumference on the surface of the side close to the phosphor conversion layer 2. The thickness of the blades 4 is 0.5 to 1.2 mm, the blades 4 are arc-shaped, and the number of blades 4 distributed along the circumference is a prime number. In addition, it can also be as follows Figure 8 and Figure 9As shown, the other surface of the substrate 1 opposite the fluorescence conversion layer 2 is provided with circumferentially distributed blades 4, and the surface adjacent to the fluorescence conversion layer 2 is provided with circumferentially distributed blades 4. Alternatively, circumferentially distributed blades 4 may be provided on both sides of the spacer 3. The blades 4 are 0.5 to 1.2 mm thick, arc-shaped, and the number of circumferentially distributed blades 4 is a prime number. The blades 4 can be positioned in a variety of ways, allowing for flexible configuration as needed. All of these methods utilize the blades 4 to stir the air and form an airflow when the fluorescence excitation device rotates, effectively dissipating heat from the fluorescence conversion layer 2 and substrate 1 by convection.

[0046] The fluorescent excitation device is driven by a motor to generate fluorescence under the irradiation of excitation light. The fluorescent excitation device also actively dissipates heat due to rotation. At the same time, the vibration of the motor itself and the disturbance of the air caused by the rotation of the fluorescent excitation device will cause noise. The noise level can be calculated by the following formula:

[0047] Lw=10×log(N×10 0.1 +∑Q 0.1 )

[0048] Among them, Lw is the noise level of the fluorescent excitation device (in decibels), N is the motor rotation speed (in revolutions per minute), and Q is the wind flow rate generated by the fluorescent excitation device disturbing the air (in cubic meters per second). It can be seen that the noise level is proportional to the motor speed and the wind flow rate driven by the fluorescent excitation device. That is, the higher the motor speed and the greater the wind flow rate, the greater the noise.

[0049] The motor's load and moment of inertia are crucial factors influencing the structural and heat dissipation design of the fluorescence excitation device. The load determines the total weight of the fluorescence excitation device. The greater the load the motor can carry, the fewer restrictions on the thickness and material density of the fluorescence excitation device, and the better the heat dissipation conditions. The moment of inertia limits the diameter and blade shape of the fluorescence excitation device. The greater the moment of inertia, the better the heat dissipation conditions.

[0050] The heat dissipation performance of the fluorescence excitation device itself is related to the diameter, surface area, material, rotation speed of the fluorescence excitation device and the height, number and shape of the blades. Figures 4 to 9The fluorescent excitation device shown is used as an example for explanation, that is, the spacer 3 is connected to the inner ring of the circular substrate 1. The larger the outer diameter of the substrate 1, the larger the volume and surface area, which can better achieve heat distribution and heat dissipation; the thicker the thickness of the substrate 1, the larger the volume and the better the temperature distribution effect; the smaller the material density of the substrate 1, the lighter the overall weight of the fluorescent excitation device, which is conducive to the use of a substrate 1 with a larger diameter, so that the volume and surface area are larger, which is conducive to better heat distribution and heat dissipation; the faster the rotation speed of the fluorescent excitation device, the greater the disturbance of the air by the fluorescent excitation device, the faster the wind speed, the greater the convection heat transfer coefficient, and the better the heat dissipation effect; the thicker the thickness of the blade, the stronger the disturbance effect on the air, and the better the heat dissipation effect; the longer the length of the blade, the stronger the disturbance effect on the air, and the better the heat dissipation effect; the wider the width of the blade , the smaller the diffusion thermal resistance between the disk of the fluorescent excitation device and the blades, the greater the original temperature difference between the blades and the surrounding air, and the better the heat dissipation effect; the more blades there are, the stronger the disturbance effect on the air, and the better the heat dissipation effect; the more conducive the shape of the blades is to air flow, the smaller the wind resistance; when the fluorescent excitation device rotates, the wind speed at the radial outer side of the blades is the largest, and the closer the blades are to the motor at the radial center, the better the airflow formed by the blades can dissipate heat for the motor; the substrate 1 and the motor are thermally isolated by a partition to prevent the heat on the substrate 1 from being directly transferred to the motor, thereby improving the working reliability of the motor. The larger the diameter of the partition, the greater the distance between the substrate 1 and the motor, and the better the heat insulation effect. The above influencing factors do not exist independently, but influence each other. For example, when the load of the motor is determined, if the thickness of the substrate increases, the thickness and number of the blades will be limited, and the radial position of the blades on the substrate will also result in completely different moments of inertia. In a specific embodiment, such as Figure 10 and Figure 11 As shown, the fluorescence conversion layer 2 is arranged on the front surface of the substrate 1, and the fluorescence conversion layer 2 is arranged on the radially outer area of ​​the substrate 1. The fluorescence conversion layer 2 is annular, and the surface area of ​​the fluorescence conversion layer 2 is 1000 to 3000 mm 2 The blades 4 are arranged on the back side of the substrate 1 and are arranged in the radially inner area of ​​the substrate 1. Preferably, the outer diameter of the area occupied by the blades 4 on the substrate 1 is less than or equal to the inner diameter of the area occupied by the fluorescent conversion layer 2, and the heat dissipation surface area of ​​the blades 4 is 3600 to 15000 mm 2The moment of inertia is proportional to the first power of the load mass and proportional to the fourth power of the diameter. Therefore, the blade 4 is arranged on the radial inner side, which is beneficial to reducing the moment of inertia. Furthermore, the blade 4 is a convex structure on the back of the substrate 1, and a groove corresponding to the blade 4 is provided on the front of the substrate 1, which is beneficial to reducing the weight of the substrate 1 and increasing the surface area, which is beneficial to heat dissipation. The spacer 3 is connected to the inner ring of the circular substrate 1. The outer diameter of the spacer 3 is 15 to 35 mm, and the insulation area of ​​the spacer 3 is 1000 to 3000 mm. 2 Therefore, the fluorescent excitation device using this structure can effectively improve the heat dissipation performance, and effectively prevent heat from being conducted to the motor, ensuring the wavelength conversion efficiency, and effectively protecting the motor and extending its service life.

[0051] like Figure 10 and Figure 11 The fluorescent excitation device assembly structure shown is a fluorescent excitation device connected to the output shaft of the motor 6 through the spacer 3, and then the motor 6 is directly connected to the optical machine housing 7 through the back plate of the motor 6. When the optical machine is working, the heat is relatively large, so the optical machine housing 7 is usually made of heat-conducting materials, such as copper, aluminum alloy and other metal materials. The motor 6 is directly connected to the optical machine housing 7, which is a direct heat conduction connection between the motor 6 and the optical machine housing 7. The heat generated by the motor 6 when working can also be dissipated through the optical machine housing 7. The heat conduction efficiency is high, the heat dissipation effect is good, the structure is compact, and the connection stability is good. Preferably, a heat dissipation part 71 is provided on the optical machine housing 7. The heat dissipation part 71 can specifically be a heat dissipation column, a heat dissipation fin and other structures to increase the surface area and improve the heat dissipation effect. In addition, a heat conductive material such as a heat dissipation pad can be added between the back plate of the motor 6 and the optical machine housing 7 to improve the contact sufficiency, thereby improving the heat conduction effect and improving the heat dissipation performance.

[0052] like Figure 12A wavelength conversion device is shown, wherein the substrate 1 is annular, and the spacer 3 is connected to the inner ring of the substrate 1. Blades 4 are distributed along the circumference of the spacer 3. Furthermore, a hollow area 31 is formed between adjacent blades 4 on the spacer 3, that is, the area where the blades 4 are located forms a spoke-like structure. The spacer 3 is also provided with a ring 32 on the radial inner side and / or the radial outer side of the blade 4. A shaft sleeve for connecting to a motor can be provided on the ring 32 on the radial inner side of the blade 4. When no ring is provided on the radial inner side of the blade 4, the radial inner side of the blade 4 can be directly connected to the shaft sleeve or directly connected to the output shaft of the motor. The ring 32 on the radial outer side of the blade 4 is connected to the inner ring of the substrate 1. When no ring is provided on the radial outer side of the blade 4, the radial outer side of the blade 4 is directly connected to the inner ring of the substrate 1. Regardless of the structure, the weight of the spacer 3 can be effectively reduced, which is conducive to reducing the weight of the wavelength conversion device, reducing the moment of inertia, reducing the driving power consumption, and reducing the heat conduction area, thereby better reducing the heat conducted to the power mechanism and effectively protecting the power mechanism. In addition, Figure 13 In the wavelength conversion device shown, the spacer 3 can also be a conical part, and the spacer 3 is connected to the inner ring of the circular ring-shaped substrate 1. Blades 4 distributed along the circumference can be set on the spacer 3. Since the spacer 3 can also be a conical part, the blades 4 on the spacer 3 can better stir the air to form an airflow for heat dissipation, improve the heat dissipation effect, dissipate the heat generated by the fluorescent conversion layer 2 to the outside, ensure the wavelength conversion efficiency of the fluorescent conversion layer 2, and improve the brightness and stability of the fluorescent light.

[0053] The above are merely preferred embodiments of the present invention. It should be noted that the above preferred embodiments should not be construed as limiting the present invention. The scope of protection of the present invention shall be determined by the scope defined in the claims. Persons skilled in the art will appreciate that improvements and modifications may be made without departing from the spirit and scope of the present invention, and such improvements and modifications shall also be considered within the scope of protection of the present invention.

Claims

1. A fluorescence excitation device, characterized in that: The invention comprises a substrate (1), a fluorescent conversion layer (2) and a spacer (3); the substrate (1) is made of a heat-conducting material; the fluorescent conversion layer (2) is arranged on the substrate (1); the substrate (1) is connected to a spacer (3) for connecting to a power mechanism; the spacer (3) is made of a heat-insulating material.

2. The fluorescence excitation device according to claim 1, characterized in that The base plate (1) is in the shape of a circular ring, and the spacer (3) is connected and arranged on the inner ring of the base plate (1) by means of adhesive.

3. The fluorescence excitation device according to claim 2, characterized in that: The single-side surface or both-side surfaces of the partition (3) are provided with blades (4) distributed along the circumference; And / or, the fluorescent conversion layer (2) is provided on one side surface of the substrate (1), and blades (4) distributed along the circumference are provided on the other side surface of the substrate (1).

4. The fluorescence excitation device according to claim 3, characterized in that: The outer diameter of the area occupied by the blades (4) on the substrate (1) is smaller than or equal to the inner diameter of the area occupied by the fluorescent conversion layer (2).

5. The fluorescence excitation device according to claim 3, characterized in that: The blades (4) are arc-shaped.

6. The fluorescence excitation device according to claim 3, characterized in that: A hollow area (31) is formed between the blades (4) arranged on the spacer (3), and the spacer (3) further includes a ring (32) arranged on the radial inner side of the blade (4) and / or the radial outer side of the blade (4).

7. The fluorescence excitation device according to claim 2, characterized in that: The thickness of the radial inner side of the spacer (3) is smaller than the thickness of the radial outer side of the spacer (3).

8. The fluorescence excitation device according to claim 2, characterized in that: The spacer (3) is a tapered piece.

9. The fluorescence excitation device according to claim 2, characterized in that: The density of the spacer (3) is lower than the density of the substrate (1).

10. The fluorescence excitation device according to any one of claims 1 to 9, characterized in that: The fluorescent conversion layer (2) comprises a wavelength conversion region of at least one color.

11. The fluorescence excitation device according to any one of claims 1 to 9, characterized in that: The fluorescent conversion layer (2) comprises one or more wavelength conversion regions distributed along a circumference, and the colors of the wavelength conversion regions are the same or different.

12. The fluorescence excitation device according to any one of claims 1 to 9, characterized in that: The fluorescent conversion layer (2) is formed on the substrate (1) by printing, spot coating or spraying.

13. A fluorescence excitation device assembly structure, characterized in that: The invention comprises a motor (6) and a fluorescence excitation device according to any one of claims 1 to 12, wherein the spacer (3) of the fluorescence excitation device is connected to the output shaft of the motor (6), and the motor (6) is connected to the optical machine housing (7) through the back plate of the motor (6).

14. The fluorescence excitation device assembly structure according to claim 13, characterized in that: The optical machine housing (7) is provided with a heat dissipation portion (71).

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