Light source assembly and projection equipment

Abstract

The utility model discloses a light source assembly and projection equipment. The light source assembly comprises a laser light source and a fluorescent wheel. The laser light source is used for emitting laser beams; the fluorescent wheel is located on an emergent light path of the laser light source and comprises a substrate, a driving part and a thermal isolation part; the substrate comprises a fluorescent area and a reflecting area, the fluorescent area is used for generating fluorescent light under excitation of laser beams, and the reflecting area is used for reflecting the laser beams; the driving part is connected with the substrate and used for driving the substrate to move; the thermal isolation part is located between the substrate and the driving part and used for forming thermal isolation between the substrate and the driving part. According to the fluorescent wheel, the thermal isolation part is arranged between the substrate of the fluorescent wheel and the driving part, so that heat generated by the fluorescent wheel in the fluorescent excitation process can be quickly released, heat transmitted to the driving part is reduced, the purpose of reducing the temperature of the driving part is achieved, the driving part drives the fluorescent wheel to rotate stably, and the service life of the fluorescent wheel is prolonged. The overall service life of the fluorescent wheel is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to projection technical field, especially a light source subassembly and projection equipment. BACKGROUND

[0002] With the development of projection display technology, the application of projection display products is becoming more and more widespread. Among them, laser is applied to the projection display field because of its high brightness, strong monochromaticity, wide color gamut and other advantages. In current laser projection display products, high-energy laser is generally used to excite the fluorescence wheel to emit three-color light.

[0003] In the laser projection system, due to the high energy density of the laser beam, the fluorescence wheel will generate a large amount of heat under the irradiation of high-power laser. In order to quickly dissipate this part of heat, the substrate of the fluorescence wheel is usually made of a material with good thermal conductivity to quickly transfer the heat to the motor magnetic ring of the fluorescence wheel through the substrate. However, when the motor works in a high-temperature environment, the magnetic flux of the motor magnetic ring will decrease, the magnetic moment will disappear, and the magnetism will weaken, which will affect the stability of the rotation speed of the fluorescence wheel, thereby reducing the overall service life of the fluorescence wheel. SUMMARY

[0004] In a first aspect of the embodiments of the utility model, a light source assembly is provided, comprising:

[0005] A laser light source for emitting a laser beam;

[0006] A fluorescence wheel located on the light path of the laser light source, the fluorescence wheel comprising:

[0007] A substrate; the substrate comprises a fluorescence area and a reflection area, the fluorescence area is used to generate fluorescence under the excitation of the laser beam, and the reflection area is used to reflect the laser beam;

[0008] A driving component, the substrate is connected to the driving component; the driving component drives the substrate to move; and

[0009] A thermal isolation part located between the substrate and the driving component, used to form thermal isolation between the substrate and the driving component.

[0010] In some embodiments of the utility model, the substrate is a central symmetric figure, the driving component is connected to the center of the substrate; the substrate comprises a plurality of fluorescence areas and a plurality of reflection areas, and the plurality of fluorescence areas and the plurality of reflection areas are arranged in sequence around the center;

[0011] A fluorescent powder layer is arranged in the fluorescence area, and the fluorescent powder layer is arranged at the edge position of the fluorescence area; a reflection layer is arranged in the reflection area, and the reflection layer is arranged at the edge position of the reflection area;

[0012] The region without the phosphor layer in the fluorescent region and / or the region without the reflective layer in the reflective region has a hollow structure, and the hollow structure forms the heat isolation part.

[0013] In some embodiments of the utility model, the region without the phosphor layer in the fluorescent region is hollowed out to form the hollow structure.

[0014] Alternatively, the region without the reflective layer in the reflective region is hollowed out to form the hollow structure.

[0015] In some embodiments of the utility model, a plurality of first hollow holes are formed in the region without the phosphor layer in the fluorescent region, and / or a plurality of second hollow holes are formed in the region without the reflective layer in the reflective region, and the plurality of first hollow holes and / or the plurality of second hollow holes form the hollow structure.

[0016] In some embodiments of the utility model, the substrate is a central symmetric figure, and the driving component is connected to the center of the substrate.

[0017] The fluorescent region is provided with a phosphor layer, and the phosphor layer is arranged at the edge position of the fluorescent region.

[0018] The region without the phosphor layer in the fluorescent region and / or the region without the reflective layer in the reflective region forms the heat isolation part, and the heat conductivity of the substrate material adopted by the heat isolation part is lower than the heat conductivity of the substrate material adopted by the region provided with the phosphor layer in the fluorescent region and the region provided with the reflective layer in the reflective region.

[0019] In some embodiments of the utility model, the substrate is a central symmetric figure, and the driving component includes a driving shaft, and the driving shaft is connected to the center of the substrate.

[0020] The driving shaft is coated with a first heat insulation coating, the orthographic projection of the first heat insulation coating on the driving shaft is not less than the orthographic projection of the center of the substrate on the driving shaft, and the first heat insulation coating forms the heat isolation part.

[0021] In some embodiments of the utility model, the fluorescent wheel further includes:

[0022] A shaft sleeve covers the driving shaft of the driving component.

[0023] A first gasket is located between the bushing and the base plate and is sleeved on a drive shaft of the drive component;

[0024] A second gasket is located between the base plate and the drive component and is sleeved on the drive shaft of the drive component.

[0025] In some embodiments of the utility model, the second gasket comprises a first surface and a second surface arranged oppositely, the first surface is the surface of the side close to the base plate, a second thermal insulation coating is coated on the first surface, and / or a third thermal insulation coating is coated on the second surface.

[0026] In some embodiments of the utility model, the light source assembly further comprises:

[0027] A focusing lens group is located between the laser light source and the fluorescent wheel, and is used for converging the laser beam emitted by the laser light source.

[0028] The focusing lens group comprises a first lens and a second lens arranged in sequence along the light path propagation direction, and the first lens and the second lens are both convex lenses.

[0029] In the second aspect of the utility model embodiment, a projection device is provided, comprising:

[0030] A light source assembly is the light source assembly described in any one of the embodiments of the first aspect;

[0031] An illumination system is located on the light exit side of the light source assembly, and is used for shaping and modulating the incident projection beam.

[0032] A projection lens is located on the light exit side of the illumination system and is used for projection imaging.

[0033] In the third aspect of the utility model embodiment, a projection system is provided, comprising:

[0034] A projection device is the projection device described in any one of the embodiments of the second aspect;

[0035] A projection screen is located on the light exit side of the projection device.

[0036] The technical scheme provided by the utility model embodiment at least brings the following beneficial effects:

[0037] The light source assembly provided by the embodiment of the utility model, including laser light source and fluorescent wheel, laser light source is used for emitting laser beam, fluorescent wheel is located on the light path of laser light source, fluorescent wheel includes base plate, driving part and thermal isolation part, wherein, base plate includes fluorescent area and reflection area, fluorescent area is used for producing fluorescent under the excitation of laser beam, reflection area is used for reflecting laser beam, driving part connects base plate, is used for driving base plate to move, thermal isolation part is located between base plate and driving part, is used for forming thermal isolation between base plate and driving part. BRIEF DESCRIPTION OF DRAWINGS

[0038] In order to more clearly illustrate the technical scheme of the embodiment of the utility model, the following will be briefly introduced the drawings needed to be used in the embodiment of the utility model, obviously, the drawings introduced below are only some embodiments of the utility model, for the ordinary skilled in the art, under the premise of not paying the creative labor, other drawings can also be obtained according to these drawings.

[0039] Figure 1 The structure diagram of the projection system provided by the embodiment of the utility model is provided.

[0040] Figure 2 The structure diagram of the projection equipment provided by the embodiment of the utility model is provided.

[0041] Figure 3 The structure diagram of the light source assembly provided by the embodiment of the utility model is provided.

[0042] Figure 4 The overall structure diagram of the fluorescent wheel provided by the embodiment of the utility model is provided.

[0043] Figure 5 The structure diagram of the fluorescent wheel base plate provided by the embodiment of the utility model is provided.

[0044] Figure 6 The structure diagram of the fluorescent wheel base plate provided by the embodiment of the utility model is provided.

[0045] Figure 7 The structure diagram of the fluorescent wheel base plate provided by the embodiment of the utility model is provided.

[0046] Figure 8 The structure diagram of the fluorescent wheel base plate provided by the embodiment of the utility model is provided.

[0047] Figure 9The utility model provides a structure schematic drawing of fluorescent wheel base plate no.

[0048] Figure 10 The utility model provides a structure schematic drawing of fluorescent wheel base plate no.

[0049] Figure 11 The utility model provides a structure schematic drawing of fluorescent wheel base plate no.

[0050] Figure 12 The utility model provides a structure schematic drawing of fluorescent wheel.

[0051] Figure 13 The utility model provides a structure schematic drawing of second gasket. DETAILED DESCRIPTION

[0052] In order to make the above-mentioned purpose, feature and advantage of the utility model more obvious and easy to understand, the utility model will be further described below in connection with the drawings and examples. However, the example implementation can be implemented in various forms, and should not be understood as being limited to the implementation described herein; on the contrary, these implementations are provided so that the utility model is more comprehensive and complete, and the ideas of the example implementation are fully conveyed to the person skilled in the art. The same reference signs in the drawings represent the same or similar structures, so repeated description will be omitted. The words expressing position and direction described in the utility model are described with the drawings as an example, but changes can also be made as needed, and the changes are included in the protection scope of the utility model. The drawings of the utility model are only used to show the relative position relationship and do not represent the real proportion.

[0053] Laser display projection technology is a technology for enlarging and displaying image information using an optical system and a projection space. The projection system is ultimately completed by the optical imaging system to display the image. With the continuous development of projection technology, laser is widely used in large-screen display, laser television, digital cinema, portable projection display and other fields due to its high brightness, strong monochromaticity, wide color gamut and other advantages. In order to meet the needs of users, it is expected that the volume of the light source assembly in the laser projection equipment is as small as possible, and the output energy is as high as possible.

[0054] In actual application, the projection system can be divided into a front projection type projection system and a back projection type projection system, Figure 1 The utility model provides a structure schematic drawing of projection system.

[0055] As Figure 1 Indicated, the front projection type projection system can include: projection equipment 100 and projection screen 200.

[0056] The projection screen 200 is located at the light exit side of the projection device 100, the audience faces the projection screen 200, the projection device 100 emits the projection light, the projection light is incident to the projection screen 200, and the projection screen 200 reflects the projection light to the position where the audience is located, so that the audience watches the projection image.

[0057] Figure 2 A structure diagram of the projection device is provided for the embodiment of the utility model.

[0058] As shown in Figure 2 , the projection device 100 comprises a light source assembly 1, an illumination system 2 and a projection lens 3.

[0059] The light source assembly 1 is used for emitting a laser beam; the illumination system 2 is located at the light exit side of the light source assembly 1 and is used for homogenizing, shaping and modulating the laser beam emitted by the light source assembly 1; and the projection lens 3 is located at the light exit side of the illumination system 2 and is used for imaging the light beam modulated by the illumination system 2.

[0060] The light source assembly 1 usually comprises a laser light source, which can adopt a monochromatic laser or a three-color laser. In the embodiment of the utility model, the laser light source adopts a monochromatic laser.

[0061] As shown in Figure 2 , the illumination system 2 can comprise a light homogenizing element 21, a shaping lens 22 and a light modulator 23.

[0062] The light homogenizing element 21 can adopt a light guide pipe as shown in Figure 2 , or other light homogenizing elements such as a compound eye lens. The shaping lens 22 can adjust the shape and size of the laser spot of the incident light modulator 23, so that the laser beam is incident to the light modulator 23 at a suitable angle.

[0063] The light modulator 23 is used for modulating the incident light to form an image. In specific implementation, the light modulator 23 can adopt a transmissive light modulator or a reflective light modulator. Figure 2 As shown in , the light modulator 23 is a reflective light modulator. The light modulator 23 receives the light reflected by the light splitting prism P and modulates the incident light, and reflects the modulated light. Since the light path is folded back by the reflective light modulator, the volume of the projection device can be reduced.

[0064]

[0064] In the embodiment of the utility model, the light modulator 23 can adopt a liquid crystal on silicon (LCoS) or a digital micromirror device (DMD).

[0065] LCoS is based on semiconductor technology to paste the Complementary Metal Oxide Semiconductor (CMOS) substrate and glass substrate containing transparent electrodes, and then injection liquid crystal package. LCoS has high open rate of each pixel, high resolution and other characteristics, can form a high-resolution image.

[0066] DMD includes a plurality of micro-mirrors, each of which can be individually driven to deflect, and by controlling the deflection angle of the DMD, the brightness of the light incident on the projection lens 3 is controlled.

[0067] The light splitting prism P is used to separate the illumination beam and the imaging beam. The laser beam emitted by the light source assembly 1 is finally reflected by the light splitting prism P to the light modulator 23 after being shaped and homogenized, and the light modulated and emitted by the light modulator 23 will be transmitted through the light splitting prism P and incident on the projection lens 3.

[0068] After the light modulator 23 modulates the incident light to form an image, the light is reflected to the projection lens 3, which forms an image, so that the image is projected to the appropriate size for viewing.

[0069] In the structure of the light source assembly 1 using a single-color laser, a fluorescent wheel needs to be used to realize full-color display. Taking a blue laser used in the light source assembly 1 as an example, the blue laser emits blue laser light to the surface of the fluorescent wheel to excite the fluorescent wheel to generate yellow and green fluorescent light, so that the light source assembly 1 can emit three-color laser beams to the illumination system 2.

[0070] In order to improve the transmission efficiency, the spot size of the single-color laser is usually compressed to be relatively small, and the energy density of the small-size laser spot is large, which will cause a large amount of heat to be generated in the fluorescent powder layer of the fluorescent wheel during excitation. In order to quickly dissipate this part of heat, the substrate of the fluorescent wheel is usually made of a material with good thermal conductivity, such as an aluminum substrate. The substrate material with good thermal conductivity quickly transfers the heat generated by the fluorescent powder layer to the motor magnetic ring.

[0071] With the development of inorganic glue and ceramic fluorescent powder layer technology, the upper limit of temperature that the fluorescent powder layer can withstand is getting higher and higher. Currently, the fluorescent powder layer can withstand a high temperature of about 200 degrees. However, the motor usually requires that its working temperature does not exceed 125 degrees. After the heat generated by the fluorescent powder layer is transmitted to the motor, the motor is in a high-temperature working environment. In this case, on the one hand, the high temperature will accelerate the movement of free electrons in the magnetic material of the motor magnetic ring, which will destroy the ordered arrangement of the magnetic moment, cause the magnetic moment to disappear, and weaken the magnetism. On the other hand, the high temperature will also cause the resistance of the motor motor winding to increase, causing the loss to increase when the current passes through, and further causing the magnetic flux of the magnetic ring to decrease. The weakening of the magnetism of the motor magnetic ring will affect the service life of the motor and the speed stability of the fluorescent wheel.

[0072] In the related art, although there are also ways to reduce the temperature of the fluorescent wheel substrate by increasing the diameter of the fluorescent wheel, increasing the speed of the fluorescent wheel, or adding fins on the fluorescent wheel substrate to form an air path during rotation, etc. However, the heat dissipation and high-speed rotation of the fluorescent wheel require strong structural support and large installation space, so the methods in the related art will cause the overall size and noise of the light source assembly to increase, and also cannot effectively reduce the temperature of the motor.

[0073] Therefore, the embodiments of the present application provide a light source assembly and a projection device, which form thermal isolation between the substrate of the fluorescent wheel and the driving component, increase the temperature difference between the fluorescent wheel substrate and the driving component, reduce the heat transmitted to the driving component, so that the driving component drives the fluorescent wheel to rotate stably, and prolongs the service life of the fluorescent wheel and the driving component.

[0074] Figure 3 The structure diagram of the light source assembly provided by the embodiments of the present application is shown.

[0075] As shown in Figure 3 , the light source assembly 1 can include a laser light source 11 and a fluorescent wheel 12, wherein:

[0076] The laser light source 11 is used for emitting a laser beam; the fluorescent wheel 12 is located on the emission path of the laser light source and is used for generating fluorescence under the excitation of the first part of the laser beam and reflecting the second part of the laser beam.

[0077] Further, as shown in Figure 3 , the light source assembly 1 can further include a focusing lens group 13; the focusing lens group 13 is located between the laser light source 11 and the fluorescent wheel 12 and is used for converging the laser beam emitted by the laser light source 11; wherein the focusing lens group 13 can include a first lens C1 and a second lens C2 arranged in sequence along the propagation direction of the light path, and the first lens C1 and the second lens C2 are both convex lenses.

[0078] It should be noted that the focusing lens group 13 in the embodiments of the present application can also include other numbers of lenses, that is, a proper number and surface type of lenses can be used as needed, and the specific radius, curvature, thickness and other parameters thereof are obtained through optical design, which are not limited herein.

[0079] Figure 4 The overall structure schematic diagram of the fluorescence wheel provided by the embodiments of the present application is shown.

[0080] As Figure 4 shown, the fluorescence wheel 12 can include a substrate 121, a driving component 122 and a thermal isolation part 123, wherein:

[0081] The substrate 121 includes a fluorescence area 1211 and a reflection area 1212, the fluorescence area 1211 is used to generate fluorescence under the excitation of a laser beam, and the reflection area 1212 is used to reflect the laser beam; the driving component 122 is connected to the substrate 121 and is used to drive the substrate 121 to move; the thermal isolation part 123 is located between the substrate 121 and the driving component 122 and is used to form thermal isolation between the substrate 121 and the driving component 122.

[0082] In the light source assembly provided by the embodiments of the present application, the thermal isolation part is arranged between the substrate of the fluorescence wheel and the driving component, so that the heat generated by the fluorescence wheel in the fluorescence excitation process can be quickly released, the heat transferred to the driving component is reduced, the purpose of reducing the temperature of the driving component is achieved, and the driving component drives the fluorescence wheel to stably rotate, thereby prolonging the service life of the fluorescence wheel and the driving component.

[0083] Further, as Figure 4 shown, the fluorescence wheel 12 can also include a shaft sleeve 124, a first gasket 125 and a second gasket 126, wherein:

[0084] The driving component 122 includes a driving shaft 122-A, the shaft sleeve 124 covers the driving shaft 122-A of the driving component 122; the first gasket 125 is located between the shaft sleeve 124 and the substrate 121 and is sleeved on the driving shaft 122-A of the driving component 122; and the second gasket 126 is located between the substrate 121 and the driving component 122 and is sleeved on the driving shaft 122-A of the driving component 122.

[0085] In the embodiments of the present application, the body of the driving component 122 can be provided with a TIM (English: Thermal Interface Material, Chinese: thermal interface material) adhesive tape 122-B for heat dissipation of the driving component 122; and the driving component 122 can adopt a motor.

[0086] Figure 5 The structure schematic diagram one of the fluorescence wheel substrate provided by the embodiments of the present application is shown.

[0087] like Figure 5 As shown, in the fluorescent wheel 12, the substrate 121 is a centrally symmetrical shape, and the driving component 122 is connected to the center of the substrate 121. The substrate 121 includes multiple fluorescent areas 1211 and multiple reflective areas 1212, which are arranged sequentially around the center. A phosphor layer 1211-A is disposed in the fluorescent area 1211, and the phosphor layer 1211-A is disposed at the edge of the fluorescent area 1211. A reflective layer 1212-A is disposed in the reflective area 1212, and the reflective layer 1212-A is disposed at the edge of the reflective area 1212.

[0088] In this embodiment of the present invention, the area of ​​the fluorescent region 1211 where the fluorescent powder layer 1211-A is not provided, and / or the area of ​​the reflective region 1212 where the reflective layer 1212-A is not provided, has a hollow structure, and the hollow structure forms a thermal insulation part 123.

[0089] In some embodiments, the substrate 121 may be made entirely of a material with good thermal conductivity, such as an aluminum substrate; in addition, the substrate 121 may be circular, or it may be in other centrally symmetrical shapes, such as a square, etc. The present invention does not impose any restrictions on this.

[0090] For ease of explanation, in the following embodiments, the substrate 121 includes two fluorescent regions 1211 and two reflective regions 1212 as an example. A phosphor layer 1211-A is provided in the edge region of each fluorescent region 1211, while no phosphor layer 1211-A is provided in the remaining region 1211-B. Similarly, a reflective layer 1212-A is provided in the edge region of each reflective region 1212, while no reflective layer 1212-B is provided in the remaining region 1212-B.

[0091] In some embodiments, the area of ​​the fluorescent region 1211 where no phosphor layer 1211-A is provided can be hollowed out to form a hollow structure, which forms a thermal insulation portion 123.

[0092] Specifically, such as Figure 5 As shown, it can be Figure 5 The substrate in the area marked 1211-B is hollowed out, while the substrate in the area where the phosphor layer 1211-A and the area where the reflective area 1212 are located is retained. In this way, the fully hollowed-out structure formed in the phosphor area 1211 can form the thermal isolation part 123.

[0093] In the above embodiment, after hollowing out 1211-B (the area of ​​fluorescent region 1211 where the phosphor layer 1211-A is not provided), the resulting hollow structure can quickly transfer the heat generated by the phosphor layer 1211-A to reduce the temperature of the phosphor layer 1211-A and prevent it from overheating. At the same time, since this heat is quickly dissipated through the hollow structure, the heat transferred to the subsequent driving component 122 can also be reduced, thus lowering the temperature of the driving component 122 and ensuring that the driving component 122 can operate in a suitable temperature environment. The driving component 122 can drive the substrate 121 to rotate stably, extending the overall service life of the phosphor wheel 12.

[0094] In some embodiments, the area of ​​the reflective region 1212 where the reflective layer 1212-A is not provided can be hollowed out to form a hollow structure, which forms a thermal insulation portion 123.

[0095] Figure 6 This is the second schematic diagram of the structure of the fluorescent wheel substrate provided in the embodiment of this utility model.

[0096] Specifically, such as Figure 6 As shown, it can be Figure 6 The substrate in the area marked 1212-B is hollowed out, retaining the substrate in the area containing the phosphor region 1211 and the area containing the reflective layer 1212-A. This creates a fully hollowed-out structure within the reflective region 1212, forming the thermal isolation portion 123. This thermal isolation portion 123 can quickly transfer the heat generated by the phosphor layer 1211-A, reducing its temperature. Simultaneously, it reduces the heat transferred to the subsequent driving component 122, lowering its temperature and thus extending the overall lifespan of the phosphor wheel 12.

[0097] In some embodiments, a portion of the region of the fluorescent region 1211 where no phosphor layer 1211-A is provided, and a portion of the region of the reflective region 1212 where no reflective layer 1212-A is provided, can be hollowed out to form a hollow structure, which forms a thermal insulation portion 123.

[0098] Figure 7 The third schematic diagram of the structure of the fluorescent wheel substrate provided in the embodiment of this utility model.

[0099] Specifically, such as Figure 7 As shown, it can be Figure 7 The substrate portion marked as 1211-B is hollowed out, and the substrate portion is... Figure 7The substrate in the area indicated by 1212-B is also partially hollowed out, and the substrate in the area where the phosphor layer 1211-A is located, the area indicated by 1211-B, the area where the reflective layer 1212-A is located, and the area indicated by 1212-B are reserved, so that the full hollow structure formed in the fluorescent area 1211 and the reflective area 1212 can form the heat isolation part 123 to quickly transfer the heat generated by the phosphor layer 1211-A.

[0100] It should be noted that in the embodiments of the present application, the full hollow structure can be symmetrically arranged around the center of the substrate, so that the wind noise and dynamic balance difference caused by the full hollow structure formed on the substrate are smaller during high-speed rotation of the fluorescent wheel. Of course, the full hollow structure can be asymmetrically arranged around the center of the substrate, and the embodiments of the present application do not make any limitation in this regard.

[0101] In the scheme of forming the heat isolation part based on the full hollow structure, although the wind noise and dynamic balance difference generated during high-speed rotation of the fluorescent wheel can be reduced by symmetrically arranging the full hollow structure, the reduction effect is limited. In order to better alleviate the wind noise and dynamic balance difference, the embodiments of the present application also provide the following schemes for forming the heat isolation part:

[0102] In some embodiments, a plurality of first hollow holes are formed in the area of the fluorescent area 1211 where the phosphor layer 1211-A is not arranged, and / or a plurality of second hollow holes are formed in the area of the reflective area 1212 where the reflective layer 1212-A is not arranged, and the plurality of first hollow holes and / or the plurality of second hollow holes form a hollow structure, and the hollow structure forms the heat isolation part 123.

[0103] It should be noted that in the embodiments of the present application, the shape of the first hollow hole can be circular, rectangular, or other polygonal or irregular shape, and the embodiments of the present application do not make any limitation in this regard. The shape of the second hollow hole can be circular, rectangular, or other polygonal or irregular shape, and the shape of the first hollow hole and the shape of the second hollow hole can be the same or different, and the embodiments of the present application do not make any limitation in this regard.

[0104] Figure 8 Fig. 4 is a structural schematic diagram of a fluorescent wheel substrate provided by an embodiment of the present application; Figure 9 Fig. 5 is a structural schematic diagram of a fluorescent wheel substrate provided by an embodiment of the present application; Figure 10 Fig. 6 is a structural schematic diagram of a fluorescent wheel substrate provided by an embodiment of the present application.

[0105] As Figure 8As shown in the figure, a plurality of first hollow holes H1 can be formed in the area of the fluorescent area 1211 without the fluorescent powder layer 1211-A, that is, the area indicated by 1211-B, and the hollow structure composed of the plurality of first hollow holes H1 is used to form the heat isolation part 123. The plurality of first hollow holes H1 can be uniformly distributed in the area indicated by 1211-B, or can be randomly distributed in the area indicated by 1211-B, and the embodiments of the present application do not make any limitation in this regard.

[0106] As shown in the figure, Figure 9 A plurality of second hollow holes H2 can be formed in the area of the reflective area 1212 without the reflective layer 1212-A, that is, the area indicated by 1212-B, and the hollow structure composed of the plurality of second hollow holes H2 is used to form the heat isolation part 123. The plurality of second hollow holes H2 can be uniformly distributed in the area indicated by 1212-B, or can be randomly distributed in the area indicated by 1212-B, and the embodiments of the present application do not make any limitation in this regard.

[0107] As shown in the figure, Figure 10 A plurality of first hollow holes H1 can be formed in the area of the fluorescent area 1211 without the fluorescent powder layer 1211-A, that is, the area indicated by 1211-B, and a plurality of second hollow holes H2 can be formed in the area of the reflective area 1212 without the reflective layer 1212-A, that is, the area indicated by 1212-B, so that the hollow structure composed of the plurality of first hollow holes H1 and the plurality of second hollow holes H2 is used to form the heat isolation part 123.

[0108] The heat isolation part 123 is formed by setting the hollow holes on the substrate 121, which can further improve the wind noise and dynamic balance difference problems generated by the fluorescent wheel in the process of high-speed rotation, compared with the mode of directly hollowing a region.

[0109] In some embodiments, the area of the fluorescent area 1211 without the fluorescent powder layer 1211-A and / or the area of the reflective area 1212 without the reflective layer 1212-A forms the heat isolation part 123, and the thermal conductivity of the substrate material adopted by the heat isolation part 123 is lower than the thermal conductivity of the substrate material adopted by the area of the fluorescent area 1211 with the fluorescent powder layer 1211-A and the area of the reflective area 1212 with the reflective layer 1212-A.

[0110] Figure 11 A structure diagram of the seventh fluorescent wheel substrate of the embodiments of the present application is provided.

[0111] As shown in the figure, Figure 11As shown, the substrate material used in the region of substrate 121 that carries phosphor layer 1211-A and reflective layer 1212-A is a material with good thermal conductivity, such as a metal substrate; the remaining regions of substrate 121 include region 1211-B in phosphor region 1211 where phosphor layer 1211-A is not provided, and region 1212-B in reflective region 1212 where reflective layer 1212-A is not provided; the substrate material used in region 1211-B can be a material with poor thermal conductivity, such as glass or plastic; the substrate material used in region 1212-B can also be a material with poor thermal conductivity; or both regions 1211-B and region 1212-B can be made of materials with poor thermal conductivity.

[0112] By setting the substrate 121 to two materials with different thermal conductivity, the heat transferred to the drive component can be reduced, while eliminating the wind noise and dynamic balance problems caused by the hollow structure during the high-speed rotation of the fluorescent wheel.

[0113] In some embodiments, the drive shaft 122-A of the drive component 122 is connected to the center of the substrate 121; a first heat-insulating coating B1 is coated on the drive shaft 122-A, and the orthographic projection of the first heat-insulating coating B1 on the drive shaft 122-A is not less than the orthographic projection of the center of the substrate 121 on the drive shaft 122-A, and the first heat-insulating coating forms a thermal insulation portion 123.

[0114] Figure 12 This is a schematic diagram of the structure of the fluorescent wheel provided in an embodiment of the present invention.

[0115] like Figure 12 As shown, a first heat-insulating coating B1 can be applied at the connection between the drive shaft 122-A and the substrate 121. The width w1 of the first heat-insulating coating can be greater than or equal to the thickness d1 of the substrate 121. This can also reduce the heat transferred to the drive component 122, thereby lowering the temperature of the drive component 122.

[0116] To further reduce the heat transferred to the drive component 122, the second pad 126 in the fluorescent wheel 12 can also be processed. The second pad 126 includes a first surface S1 and a second surface S2 disposed opposite to each other. The first surface S1 is the surface close to the substrate 121. The first surface S1 is coated with a second heat-insulating coating B2, and / or the second surface S2 is coated with a third heat-insulating coating B3.

[0117] Figure 13 This is a schematic diagram of the structure of the second gasket provided in an embodiment of the present utility model.

[0118] like Figure 13As shown, the second thermal insulation coating B2 can be coated on the first surface S1 of the second gasket 126, the third thermal insulation coating B3 can be coated on the second surface S2 of the second gasket 126, or the thermal insulation coating can be coated on both the first surface S1 and the second surface S2 of the second gasket 126. By coating the thermal insulation coating on at least one surface of the second gasket 126 between the substrate 121 and the driving component 122, the heat transfer between the substrate 121 and the driving component 122 is further insulated, the heat transferred to the driving component 122 is reduced, the temperature of the driving component 122 is reduced, and the driving component 122 is ensured to always work in a suitable working temperature environment.

[0119] Based on the same inventive concept, the utility model embodiment further provides a projection device, such as Figure 2 As shown, the projection device 100 can include a light source assembly 1, an illumination system 2, and a projection lens 3, wherein the light source assembly 1 is the light source assembly 1 provided by any of the above embodiments; the illumination system 2 is located on the light exit side of the light source assembly 1, and is used for shaping and modulating the incident projection light beam; the projection lens 3 is located on the light exit side of the illumination system 2, and is used for projection imaging.

[0120] According to the first utility model concept, the light source assembly includes a laser light source and a fluorescent wheel, wherein:

[0121] The laser light source is used for emitting a laser light beam;

[0122] The fluorescent wheel is located on the light exit path of the laser light source, and the fluorescent wheel includes:

[0123] A substrate; the substrate includes a fluorescent region and a reflection region, the fluorescent region is used for generating fluorescence under the excitation of the laser light beam, and the reflection region is used for reflecting the laser light beam;

[0124] A driving component, the substrate is connected to the driving component; the driving component drives the substrate to move; and

[0125] A thermal isolation part, located between the substrate and the driving component, is used for forming thermal isolation between the substrate and the driving component.

[0126] According to the second utility model concept, the substrate is a center-symmetric pattern, and the driving component is connected to the center of the substrate; the substrate includes a plurality of fluorescent regions and a plurality of reflection regions, and the plurality of fluorescent regions and the plurality of reflection regions are arranged in sequence around the center;

[0127] The fluorescent region is provided with a fluorescent powder layer, and the fluorescent powder layer is arranged at the edge position of the fluorescent region; the reflection region is provided with a reflection layer, and the reflection layer is arranged at the edge position of the reflection region;

[0128] The region in the fluorescent region without the fluorescent powder layer and / or the region in the reflection region without the reflection layer has a hollow structure, and the hollow structure forms the thermal isolation part.

[0129] According to the third utility model concept, the hollowed-out fluorescent region is not provided with a region of a fluorescent powder layer to form a hollow structure.

[0130] Alternatively, the hollowed-out reflective region is not provided with a region of a reflective layer to form a hollow structure.

[0131] According to the fourth utility model concept, a plurality of first hollow holes are formed in the region of the fluorescent region that is not provided with a fluorescent powder layer, and / or a plurality of second hollow holes are formed in the region of the reflective region that is not provided with a reflective layer, and the plurality of first hollow holes and / or the plurality of second hollow holes form a hollow structure.

[0132] According to the fifth utility model concept, the substrate is a central-symmetrical pattern, and the driving component is connected to the center of the substrate; the substrate comprises a plurality of fluorescent regions and a plurality of reflective regions, and the plurality of fluorescent regions and the plurality of reflective regions are arranged in sequence around the center;

[0133] The fluorescent region is provided with a fluorescent powder layer, and the fluorescent powder layer is arranged at an edge position of the fluorescent region; the reflective region is provided with a reflective layer, and the reflective layer is arranged at an edge position of the reflective region;

[0134] The region of the fluorescent region that is not provided with a fluorescent powder layer and / or the region of the reflective region that is not provided with a reflective layer forms a heat isolation portion, and the heat isolation portion adopts a substrate material having a thermal conductivity lower than that of a substrate material adopted by the region of the fluorescent region provided with a fluorescent powder layer and the region of the reflective region provided with a reflective layer.

[0135] According to the sixth utility model concept, the substrate is a central-symmetrical pattern, and the driving component comprises a driving shaft connected to the center of the substrate;

[0136] The driving shaft is coated with a first heat insulation coating, and a normal projection of the first heat insulation coating on the driving shaft is not smaller than a normal projection of the center of the substrate on the driving shaft, and the first heat insulation coating forms a heat isolation portion.

[0137] According to the seventh utility model concept, the fluorescent wheel further comprises:

[0138] A shaft sleeve covering the driving shaft of the driving component;

[0139] A first gasket located between the shaft sleeve and the substrate and sleeved on the driving shaft of the driving component;

[0140] A second gasket located between the substrate and the driving component and sleeved on the driving shaft of the driving component.

[0141] According to the eighth utility model concept, the second gasket comprises oppositely arranged first and second surfaces, the first surface is a surface close to the substrate, the first surface is coated with a second heat insulation coating, and / or the second surface is coated with a third heat insulation coating.

[0142] According to the ninth practical new type concept, the light source assembly further comprises a focusing lens group;

[0143] The focusing lens group is located between the laser light source and the fluorescent wheel, and is used for converging the laser beam emitted by the laser light source; the focusing lens group comprises a first lens and a second lens arranged in sequence along a light path propagation direction, and the first lens and the second lens are both convex lenses.

[0144] Based on the same practical new type concept, the embodiment of the present application further provides a projection system, as shown in the figure, the projection system can comprise a projection device 100 and a projection screen 200, the projection device 100 can comprise the light source assembly 1 provided by any one of the above-mentioned embodiments. Figure 1

[0145] Although the preferred embodiments of the present application have been described, those skilled in the art can make further changes and modifications to these embodiments once they know the basic creative concept. Therefore, the appended claims are intended to be interpreted as including all the preferred embodiments and all the changes and modifications falling within the scope of the present application.

[0146] Obviously, those skilled in the art can make various modifications and variations to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application also intends to include these modifications and variations.​

Claims

1. A light source assembly, characterized in that, include: Laser source, used to emit laser beams; A phosphor wheel, located in the output light path of the laser light source, the phosphor wheel comprising: A substrate; the substrate includes a fluorescent region and a reflective region, the fluorescent region being used to generate fluorescence under the excitation of the laser beam, and the reflective region being used to reflect the laser beam; A driving component is connected to the substrate; the driving component moves the substrate; and A thermal isolation section is located between the substrate and the driving component, and is used to form thermal isolation between the substrate and the driving component.

2. The light source assembly as described in claim 1, characterized in that, The substrate has a centrally symmetrical shape, and the driving component is connected to the center of the substrate; the substrate includes a plurality of fluorescent regions and a plurality of reflective regions, which are arranged sequentially around the center; A phosphor layer is disposed within the fluorescent region, and the phosphor layer is disposed at the edge of the fluorescent region; a reflective layer is disposed within the reflective region, and the reflective layer is disposed at the edge of the reflective region. The fluorescent region where the phosphor layer is not provided and / or the reflective region where the reflective layer is not provided have a hollow structure, and the hollow structure forms the thermal isolation part.

3. The light source assembly as described in claim 2, characterized in that, The area of ​​the fluorescent region where the phosphor layer is not located is hollowed out to form the hollow structure; Alternatively, the area of ​​the reflective zone where the reflective layer is not located can be hollowed out to form the hollow structure.

4. The light source assembly as described in claim 2, characterized in that, Multiple first perforations are formed in the fluorescent region where the phosphor layer is not provided, and / or multiple second perforations are formed in the reflective region where the reflective layer is not provided, the multiple first perforations and / or the multiple second perforations forming the perforated structure.

5. The light source assembly as described in claim 1, characterized in that, The substrate has a centrally symmetrical shape, and the driving component is connected to the center of the substrate; the substrate includes a plurality of fluorescent regions and a plurality of reflective regions, which are arranged sequentially around the center; A phosphor layer is disposed within the fluorescent region, and the phosphor layer is disposed at the edge of the fluorescent region; a reflective layer is disposed within the reflective region, and the reflective layer is disposed at the edge of the reflective region. The thermal isolation portion is formed in the region of the fluorescent region where the phosphor layer is not provided and / or in the region of the reflective region where the reflective layer is not provided. The thermal conductivity of the substrate material used in the thermal isolation portion is lower than that of the substrate material used in the region of the fluorescent region where the phosphor layer is provided and the region of the reflective region where the reflective layer is provided.

6. The light source assembly as described in claim 1, characterized in that, The substrate is a centrally symmetrical shape, and the driving component includes a driving shaft connected to the center of the substrate; The drive shaft is coated with a first heat-insulating coating, the orthographic projection of the first heat-insulating coating on the drive shaft is not less than the orthographic projection of the center of the substrate on the drive shaft, and the first heat-insulating coating forms the thermal insulation portion.

7. The light source assembly as described in claim 1, characterized in that, The fluorescent wheel also includes: A bushing that covers the drive shaft of the drive component; The first gasket is located between the bushing and the base plate, and is sleeved on the drive shaft of the drive component; The second gasket is located between the substrate and the driving component, and is sleeved on the driving shaft of the driving component.

8. The light source assembly as described in claim 7, characterized in that, The second gasket includes a first surface and a second surface disposed opposite to each other, the first surface being the surface closer to the substrate, the first surface being coated with a second heat-insulating coating, and / or the second surface being coated with a third heat-insulating coating.

9. The light source assembly as described in any one of claims 1 to 8, characterized in that, Also includes: A focusing lens assembly is located between the laser source and the phosphor wheel; the focusing lens assembly is used to converge the laser beam emitted by the laser source. The focusing lens group includes a first lens and a second lens arranged sequentially along the optical path propagation direction, and both the first lens and the second lens are convex lenses.

10. A projection device, characterized in that, include: A light source assembly, wherein the light source assembly is the light source assembly according to any one of claims 1 to 9; An illumination system, located on the light-emitting side of the light source assembly, is used to shape and modulate the incident projection beam; A projection lens, located on the light-emitting side of the lighting system, is used for projection imaging.

Images