CN216118357U - Fluorescent color wheel module and light source system - Google Patents

Abstract

The application discloses fluorescence colour wheel module and light source system. The fluorescent color wheel module comprises: a housing provided with a light-transmitting portion; the fluorescent color wheel is positioned in the shell, the middle part of the fluorescent color wheel is connected with a motor through a rotating shaft, and the motor drives the fluorescent color wheel to rotate; the fluorescent color wheel is provided with a fluorescent area on one surface facing the light transmission part, when the fluorescent color wheel rotates, different positions of the fluorescent area are alternately positioned at corresponding positions of the light transmission part, and the fluorescent color wheel is also provided with a plurality of through holes; and at least part of the heat dissipation device is positioned in the shell, the heat dissipation structure comprises first heat dissipation fins arranged on the opposite surface of the fluorescent area of the fluorescent color wheel, and the first heat dissipation fins are distributed around the rotating shaft. The fluorescent color wheel module of the embodiment of the application can improve the heat dissipation efficiency and prolong the service life of the fluorescent color wheel module while ensuring sealing.

Description

Fluorescent color wheel module and light source system

Technical Field

The application relates to the technical field of projection, in particular to a fluorescent color wheel module and a light source system.

Background

In a laser projection device, a laser light source is used to generate laser to excite a fluorescent color wheel to generate color light, and in the visible light range, the energy of photons is inversely related to the wavelength, and the shorter the wavelength is, the higher the energy of photons is. When the phosphor is excited by blue laser photons with a shorter wavelength, long wavelength fluorescent photons with lower energy are released, and at the same time, a large amount of heat energy is released along with the transition of wavelength-converted electrons. When heat is accumulated in the fluorescent layer of the fluorescent color wheel to make the temperature of the fluorescent layer reach a certain value, the energy of blue laser photons is increased, and the luminous efficiency of the fluorescent powder cannot be improved at the same time, namely the thermal quenching phenomenon of the fluorescent powder is obtained. Therefore, heat dissipation of the fluorescent color wheel is required.

In the prior art, in order to solve the heat dissipation problem of the fluorescent color wheel, some solutions may provide a heat dissipation structure, such as a heat pipe fin heat sink communicated with the outside of the casing, in the casing for conducting the heat inside the casing to the outside of the casing. However, such a structure still has a problem of insufficient heat dissipation efficiency.

SUMMERY OF THE UTILITY MODEL

In order to solve the above problems, the present application provides a fluorescent color wheel module and a light source system to realize improving the heat dissipation efficiency while being sealed, and improving the service life of the fluorescent color wheel module.

According to a first aspect of the embodiments of the present application, there is provided a fluorescent color wheel module, including: a housing provided with a light-transmitting portion; the fluorescent color wheel is positioned in the shell, the middle part of the fluorescent color wheel is connected with a motor through a rotating shaft, and the motor drives the fluorescent color wheel to rotate; the fluorescent color wheel is provided with a fluorescent area on one surface facing the light transmission part, when the fluorescent color wheel rotates, different positions of the fluorescent area are alternately positioned at corresponding positions of the light transmission part, and the fluorescent color wheel is also provided with a plurality of through holes; and at least part of the structure of the heat dissipation device is positioned in the shell and comprises first heat dissipation fins arranged on the opposite surface of the fluorescent area of the fluorescent color wheel, and the first heat dissipation fins are distributed around the rotating shaft.

In some embodiments, a first opening is provided on the housing, and the light-transmitting portion includes a lens assembly fixed at the first opening and covering the first opening.

In some embodiments, a transparent lens is fixed in the first opening, and the lens assembly is fixed at the first opening and covers the transparent lens.

In some embodiments, the housing includes an upper shell and a lower shell that are sealed to each other by a coupling.

In some embodiments, a plurality of the through holes are symmetrically arranged about the rotation axis.

In some embodiments, the through hole is located closer to the rotating shaft than the fluorescent area, and in the radial direction of the fluorescent color wheel, the ratio D1/D2 of the width D1 of the through hole to the inner diameter D2 of the fluorescent area is greater than or equal to 0.1.

In some embodiments, each of the first heat dissipation fins extends radially in an arc shape or obliquely on a plane on which the fluorescent color wheel is located.

In some embodiments, the heat dissipation device includes a heat pipe for containing liquid, the housing is provided with a second opening, an end of the heat pipe extends out of the housing through the second opening to communicate with the outside of the housing, and at least a part of the heat pipe is arranged around the rotating shaft.

In some embodiments, the number of the second openings provided on the housing is two, and the two second openings are located adjacent to each other, and two ends of the heat pipe respectively extend out of the two second openings.

In some embodiments, the heat sink includes a plurality of second heat dissipation fins perpendicular to the plane of the fluorescent color wheel, the second heat dissipation fins are at least partially spaced around the rotating shaft, and at least a portion of one end of the second heat dissipation fins away from the rotating shaft extends to contact or connect with the inner wall of the housing.

In some embodiments, a contact piece attached to the inner wall of the housing is disposed at an end of the second heat dissipation fin away from the rotating shaft, and the contact piece is connected to the second heat dissipation fin; in other embodiments, the contact plate may be integrated with the second radiator fin.

In some embodiments, an avoidance notch is formed on at least a portion of the second heat dissipation fin to form an avoidance slot, and at least a portion of the heat pipe is located in the avoidance slot.

In some embodiments, at least a portion of the second cooling fin is in contact with an outer wall of the heat pipe; in other embodiments, at least a portion of the second cooling fin is fixedly attached to the outer wall of the heat pipe.

In some embodiments, the fluorescent area may include a ring-shaped area disposed on a side of the fluorescent color wheel facing the light-transmitting portion, and different positions of the ring-shaped area are located corresponding to the light-transmitting portion when the fluorescent color wheel rotates.

In some embodiments, the fluorescent area may also include at least two fan-shaped ring segments disposed on a surface of the fluorescent color wheel facing the light-transmitting portion, and the fan-shaped ring segments are sequentially located at corresponding positions of the light-transmitting portion when the fluorescent color wheel rotates.

Another aspect of the embodiments of the present application provides a light source system, including the fluorescent color wheel module as described above.

In the fluorescent color wheel module provided by the embodiment of the application, the plurality of through holes are formed in the fluorescent color wheel, so that in the sealed shell, the gas on two sides of the light receiving surface on which the fluorescent area is arranged and the non-light receiving surface (namely opposite surface) on which the fluorescent area is not arranged can realize convection through the through holes, and the high-temperature gas on one side of the light receiving surface of the fluorescent color wheel can easily enter one side of the non-light receiving surface and can be quickly and effectively radiated by the radiating device, so that the radiating efficiency of the fluorescent color wheel module is remarkably improved, and the service life of the fluorescent color wheel module is prolonged; when the LED lamp is applied to a light source system, the performance stability and the service life of the system can be improved.

The above description is only an overview of the technical solutions of the present application, and the present application can be implemented according to the content of the description in order to more clearly understand the technical means of the present application, and the following detailed description of the present application is given in order to make the above and other objects, features, and advantages of the present application more obvious.

Drawings

Various additional advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the application. Moreover, like reference numerals are used to refer to like elements throughout. In the drawings:

fig. 1 is a schematic side sectional view of a fluorescent color wheel module according to some embodiments of the present disclosure;

fig. 2 is a schematic top view of a fluorescent color wheel module according to some embodiments of the present disclosure;

fig. 3 is a schematic top view of a fluorescent color wheel module according to other embodiments of the present disclosure.

Fig. 4 is a schematic top view of a fluorescent color wheel module according to some embodiments of the present disclosure;

fig. 5 is a schematic cross-sectional view of a light-transmitting portion of a fluorescent color wheel module according to some embodiments of the present disclosure;

fig. 6 is a schematic cross-sectional view illustrating a light-transmitting portion of a fluorescent color wheel module according to another embodiment of the present disclosure;

fig. 7 is a schematic cross-sectional view illustrating a fluorescent color wheel, i.e., a rotating shaft, in a fluorescent color wheel module according to some embodiments of the present disclosure; and

fig. 8 is a schematic top view of a fluorescent color wheel module according to some embodiments of the present disclosure, from a side of the fluorescent color wheel without a fluorescent area.

The reference numbers in the detailed description are as follows:

a fluorescent color wheel module 100;

the heat dissipation structure comprises a shell 10, an upper shell 10a, a lower shell 10b, a light-transmitting part 11, a first opening 11a, a lens component 11b, a light-transmitting lens 11c, a second opening 12, a sealing structure 13, a third heat dissipation fin 14 and a connecting piece 15;

a fluorescent color wheel 20, a fluorescent area 21, a first section 21a, a second section 21b, a third section 21c, a substrate 22, and a through hole 23;

a rotating shaft 30, a motor 31;

the heat sink 40, the first heat dissipating fins 41, the second heat dissipating fins 42, the heat pipe 43, the contact piece 44, the avoiding notch 45a, and the avoiding groove 45.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

In addition, if there is a description of "first", "second", etc. in an embodiment of the present application, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present application.

The laser fluorescent powder technology has the advantages of high efficiency, high brightness and the like, and is widely applied to the fields of illumination, display and projection. This technique generally uses blue laser as excitation light to excite phosphor and release long wavelength fluorescence photons with lower energy, and a part of the energy of the excitation light is converted into heat to be released. The amount of energy converted into heat depends on the luminous efficiency of the phosphor.

When the fluorescent powder works, if heat cannot be dissipated in time, the temperature of the fluorescent powder rises, the luminous efficiency is reduced, the heat productivity of the fluorescent powder is further increased, the temperature continues to rise, the efficiency continues to reduce until the fluorescent powder is quenched, namely the temperature of the fluorescent powder is quenched. Therefore, to ensure that the phosphor can work efficiently and durably, a timely and efficient heat dissipation approach is required. Fluorescent color wheels are currently used in the industry to avoid heat build-up on the phosphor. The illuminated surface of the fluorescent color wheel is provided with the annular fluorescent area, and the incident light spot is positioned at different positions of the fluorescent area in the rotating process of the fluorescent color wheel, so that the temperature quenching of the fluorescent powder is avoided.

In addition, the fluorescent color wheel and the optical device require a very strict sealing and dust-proof capability during operation. For this purpose, the fluorescent color wheel and the associated optics need to be enclosed in a sealed housing. How to improve the heat dissipation capability of the fluorescent color wheel while ensuring sealing and dust prevention becomes a challenge in the industry. At present, a scheme of adopting a heat pipe fin radiator is provided. The heat pipe fin radiator penetrates through the fluorescent color wheel shell to conduct the internal heat out. The scheme of using the air-liquid heat exchanger also utilizes the extremely high specific heat of the circulating liquid to quickly take away the heat generated by the fluorescent color wheel, thereby meeting the heat dissipation requirement of the fluorescent color wheel. The scheme needs the cooperation of the heat exchanger, the circulating air duct and the fluorescent color wheel shell to meet the heat dissipation and dustproof requirements of the fluorescent color wheel.

In practice, the inventor of the present application finds that heat is mainly generated on the light receiving surface of the fluorescent color wheel with the fluorescent powder, so that the temperature of the light receiving surface side of the fluorescent color wheel is significantly higher than that of the non-light receiving surface. However, since the light-receiving surface side of the fluorescent color wheel is usually provided with a lens assembly, in order to avoid blocking the light beam and being limited by the space in the housing, components such as a heat sink are usually disposed in the space in the housing on the non-light-receiving surface side. The heat on one side of the light receiving surface of the fluorescent color wheel in the shell is difficult to be quickly and effectively radiated by the radiator on one side of the backlight surface of the fluorescent color wheel, and the radiating efficiency of the fluorescent color wheel is influenced.

Based on the above discovery, some embodiments of the present application provide a fluorescent color wheel module, through set up the through-hole on the fluorescent color wheel in the casing for at fluorescent color wheel working process, the high temperature gas of sensitive surface one side can be directly through the through-hole with the gas of the lower temperature of non-sensitive surface one side carries out the convection current, and reach fluorescent color wheel's non-sensitive surface one side easily, and obtain quick heat dissipation through the heat abstractor in the casing, thereby effectively improved fluorescent color wheel's in the casing radiating efficiency, promoted fluorescent color wheel module performance's stability and life.

Referring to fig. 1 to 4, fig. 1 schematically illustrates a cross-sectional structure of a fluorescent color wheel module according to some embodiments of the present application; fig. 2 and fig. 3 respectively schematically illustrate a fluorescent color wheel module according to some embodiments of the present application, in which a fluorescent color wheel is viewed from a light-receiving surface; fig. 4 schematically illustrates a top view structure of a fluorescent color wheel from a non-light-receiving surface in a fluorescent color wheel module according to some embodiments of the present application.

As shown in the figure, the fluorescent color wheel module 100 includes a housing 10 and a fluorescent color wheel 20 accommodated in the housing 10. The housing 10 is provided with a light-transmitting portion 11 for allowing a light beam from the light source to be incident on the fluorescent color wheel 20 inside the housing 10. The light source may be, for example, a blue laser. The middle portion of the fluorescent color wheel 20 is connected to a motor 31 through a rotating shaft 30, and the motor 31 is used for driving the fluorescent color wheel 20 to rotate. A fluorescent area 21 is provided on a surface of the fluorescent color wheel 20 facing the light transmitting portion 11. The fluorescent region 21 may be, for example, a phosphor layer disposed on a substrate 22 of the fluorescent color wheel 20. When an excitation light beam from the light source is incident on the fluorescent region 21, the phosphor is excited to emit light of a longer wavelength, such as red or green fluorescence. The position of the light-transmitting portion 11 corresponds to the fluorescent area 21, so that when the fluorescent color wheel 20 rotates, different positions of the fluorescent area 21 are alternately located at the positions corresponding to the light-transmitting portion 11, and are irradiated by the excitation light beam.

The fluorescent color wheel 20 is provided with a plurality of through holes 23, and the gas on both sides of the fluorescent color wheel 20 can easily flow in a convection manner through the through holes 23. A heat dissipation device 40 is disposed in a space on the side of the surface (i.e., non-light-receiving surface) of the fluorescent color wheel 20, where the fluorescent region is not disposed, in the housing 10, and is used for dissipating heat from the fluorescent color wheel 20. At least part of the structure of the heat sink 40 is located within the housing 10. The heat sink 40 includes a first heat sink fin 41 disposed on a side of the fluorescent color wheel 20 not provided with the fluorescent area 21, and the first heat sink fin 41 is distributed around the rotating shaft 30.

The fluorescent color wheel module 100 of the embodiment of the application is provided with the plurality of through holes 23 on the fluorescent color wheel 20, so that inside the closed housing 10, the gas on the two sides of the light receiving surface on which the fluorescent area 21 is arranged on the fluorescent color wheel 20 and the non-light receiving surface on which the fluorescent area 21 is not arranged can realize convection through the through holes 23. Therefore, the gas with higher temperature on the light receiving surface side of the fluorescent color wheel 20 can exchange heat with the gas with lower temperature on the non-light receiving surface side through the through hole 23 more easily, and the heat is dissipated by the heat dissipating device 40. The heat sink 40 is at least partially disposed within the housing 10 and includes a first heat sink fin 41. The first heat dissipation fins 41 are disposed on the side of the fluorescent color wheel 20 where the fluorescent region 21 is not disposed, and are distributed around the rotating shaft 30. The arrangement of the first heat dissipation fins 41 increases the heat dissipation surface area of the fluorescent color wheel 20; and along with the rotation of the fluorescent color wheel 20, the first heat dissipation fins 41 can also generate disturbance to the gas in the housing 10, thereby improving the gas convection efficiency and improving the heat dissipation effect. The plurality of first heat dissipation fins 41 are spaced around the rotating shaft 30, which is beneficial to ensure the stability of the fluorescent color wheel 20 during the rotation process. The positions of the first heat dissipation fins 41 substantially correspond to the positions of the fluorescent area 21 and the through hole 23, so that the heat dissipation efficiency of the fluorescent color wheel module 100 is significantly improved, and the service life and the performance stability of the fluorescent color wheel module 100 are improved. Meanwhile, the closed housing 10 can also ensure the dustproof effect of the fluorescent color wheel module 100.

Referring to fig. 5 and fig. 6, the structures of the light-transmitting portion 11 of the fluorescent color wheel module 100 according to some embodiments of the present disclosure are schematically illustrated.

The light-transmitting portion 11 may be designed in a modular structure. For example, a first opening 11a may be provided on the housing 10 at a position corresponding to the fluorescent area 21 on the fluorescent color wheel 20, and the lens assembly 11b may be covered at the first opening 11 a.

As shown in the drawing, the first light-transmitting portion 11 may include a first opening 11a disposed at a position corresponding to the fluorescent area 21 on the housing 10, and a lens assembly 11b covering the first opening 11 a. The lens assembly 11b may be a single lens or a combination of multiple lenses to form a modular structure. The modular lens assembly 11b is fixed at the first opening 11a so as to cover the first opening 11a, thereby realizing the installation of the optical lens. Due to the design, more optical devices can be prevented from being arranged in the shell 10, the internal structure of the shell 10 of the fluorescent color wheel module 100 is simplified, the internal space of the shell 10 can be saved, and the miniaturization design of the fluorescent color wheel module 100 is facilitated.

In addition, the modularity of the lens assembly 11b is also beneficial to easily replace lens assemblies with different configurations as required to achieve different effects, thereby expanding the product/function adaptability of the fluorescent color wheel module 100. For example, a fixed mounting structure (not shown) may be provided at the first opening 11a for mounting the fixed lens assembly 11 b. The form of the mounting and fixing structure is not limited, for example, a screw structure having an internal thread or an external thread may be provided at the first opening hole 11a, a corresponding external thread or internal thread may be provided at the lens assembly 11b, and the lens assembly 11b may be mounted at the first opening hole 11a by screw fastening so as to cover the first opening hole 11 a; or, a clamping structure may be disposed at the first opening 11a, a corresponding clamping member is disposed at the lens assembly 11b, and the lens assembly 11b is mounted at the first opening 11a by clamping and fixing, so as to cover the first opening 11 a; alternatively, the lens assembly 11b may be adhesively fixed to the first opening 11a so as to cover the first opening 11 a. It should be understood by those skilled in the art that the mounting and fixing manner of the lens assembly 11b is not limited thereto, and two or more mounting and fixing manners may be adopted at the same time.

It should be understood that in other embodiments, the lens assembly 11b may also be non-removably secured at the first aperture 11 a.

Please continue to refer to fig. 6. In the embodiment shown in the figures, when the light-transmitting portion 11 includes the first opening 11a and the lens assembly 11b, the light-transmitting lens 11c may be further fixed at the first opening 11a, and the lens assembly 11b covers the light-transmitting lens 11c and is fixed at the first opening 11 a. Such design can ensure that the casing 10 is in a sealed state on the whole, and when the lens assembly 11b is disassembled, installed or replaced, the casing 10 is not in an open state, so that the dustproof effect of the fluorescent color wheel module 100 is improved.

With continued reference to fig. 1, in some embodiments of the present application, the housing 10 may include an upper shell 10a and a lower shell 10b, wherein the upper shell 10a and the lower shell 10b are sealed by a connecting member 15 (e.g., a screw or other connecting structure) to form a sealed housing 10. Such a structure facilitates the arrangement and fixation of the fluorescent color wheel 20 and other components in the housing 10, and facilitates the disassembly, assembly and maintenance of the fluorescent color wheel module.

When the upper shell 10a and the lower shell 10b are assembled, at least a part of the heat dissipation component 40 may be disposed in the lower shell 10b, and the fluorescent color wheel 20 and the rotating shaft 30 protrude from the accommodating space of the lower shell 10 b; after the upper shell 10a and the lower shell 10b are covered and sealed, the fluorescent color wheel 20 and a part of the rotating shaft 30 are located in the accommodating space of the upper shell 10 a.

It should be understood by those skilled in the art that the illustration is merely exemplary and that in other embodiments, the upper and lower shells 10a and 10b may be of a lid and box construction. In this case, the fluorescent color wheel 20 and the heat sink 40 are both disposed in the case of the lower case 10b, and the assembly of the case 10 is completed after the covering and sealing with the upper case 10a is completed. The structure of the housing 10 is not limited to this, for example, in other embodiments, the housing 10 may be divided into two parts, i.e., a left part and a right part, and the two parts are sealed together to complete the assembly; or otherwise.

With continuing reference to fig. 2 and 3, as shown in the figure, the plurality of through holes 23 of the fluorescent color wheel 20 may be axially symmetrically distributed about the rotation axis 30. The axisymmetrically distributed through holes 23 help to keep the fluorescent color wheel 20 smooth during rotation.

In the particular embodiment shown in the figures, the through holes 23 are circular, which facilitates the machining and the passage of the air flow. However, in other embodiments, the shape of the through hole 23 is not limited thereto, and may be designed in other shapes, such as a racetrack shape, a sector arc shape, and the like.

With continuing reference to fig. 2 and fig. 3 and with further reference to fig. 7, fig. 6 schematically illustrates cross-sectional structures of the fluorescent color wheel 20 and the rotating shaft 30 in the fluorescent color wheel module 100 according to some embodiments of the present disclosure.

As shown in the figure, the through hole 23 is located closer to the rotating shaft 30 than the fluorescent area 21 is on the fluorescent color wheel 20. For example, when the fluorescent region 21 is a ring shape formed on the light receiving surface of the fluorescent color wheel 20, the through-hole 23 is provided in a region inside the inner ring of the ring-shaped fluorescent region 21. In addition, the through hole 23 may be designed to have a sufficiently large relative size in order to ensure gas flow on both sides of the light receiving surface and the non-light receiving surface of the fluorescent color wheel 20. For example, in the radial direction of the fluorescent color wheel 20, the width of the through hole 23 (e.g., when the through hole 23 is circular, the width is the diameter of the through hole 23) may be larger than 1/10 of the inner diameter of the fluorescent region 21 on the fluorescent color wheel 20. The inventor of the present invention has found through practice that the through hole 23 designed in this way can effectively improve the gas circulation efficiency on both sides of the light receiving surface and the non-light receiving surface of the fluorescent color wheel 20, and improve the heat dissipation efficiency of the fluorescent color wheel 20.

Referring still to fig. 4, in the embodiment shown in the figure, each first heat dissipation fin 41 extends in a radial arc shape on the plane of the fluorescent color wheel 20. In other embodiments, the first heat dissipation fins 41 may also extend obliquely in a radial direction on the plane of the fluorescent color wheel 20. The arc-shaped or inclined first heat dissipation fins 41 can reduce the rotation resistance of the fluorescent color wheel 20, reduce energy consumption, and achieve the effect of a wind-fire wheel.

With continuing reference to fig. 1 and with further reference to fig. 8, fig. 8 schematically illustrates a top view of the fluorescent color wheel module 100 from the side of the fluorescent color wheel 20 without the fluorescent area 21 according to some embodiments of the present application.

As shown in the figure, the heat dissipation device 40 in the fluorescent color wheel module 100 further includes a heat pipe 43. The heat pipe 43 is used to contain liquid therein. The end of the heat pipe 43 protrudes out of the case 10 through a second opening (not shown in the drawings) to communicate with the outside of the case 10. At least a portion of the heat pipe 43 may be disposed around the rotating shaft 30 to make full use of the space around the rotating shaft 30. And the circular arrangement of the heat pipe 43 substantially corresponds to the circular fluorescent area 21 on the fluorescent color wheel 20, so that the heat collected by the fluorescent area 21 can be transmitted to the heat pipe 43 by radiation. The heat pipe 43 is located in the space on the non-light-receiving surface side of the fluorescent color wheel 20 in the housing 10, and communicates with the outside of the housing 10, and has high heat dissipation efficiency. By matching with the arrangement of the through hole 23 on the fluorescent color wheel 20, after the high-temperature gas enters the non-light-receiving surface side of the fluorescent color wheel 20 by convection through the through hole 23, the heat of the high-temperature gas can be transferred to the outside of the housing 10 through the heat pipe 43, so that the comprehensive heat dissipation efficiency is greatly improved.

Referring to fig. 8, in the embodiment shown in the figure, two second openings 12 may be disposed adjacent to each other on the housing 10, two ends of the heat pipe 43 respectively extend out of the housing 10 from the two second openings 12, and a sealing structure 13 may be disposed to seal a gap between the heat pipe 43 and the second openings 12 to ensure the sealing of the housing 10. The seal structure 13 may be a seal ring, a packing, a sealant, or the like, for example, or two or more seal structures may be used at the same time.

Such a heat dissipation structure 40 is simple in structure and convenient to assemble. For example, the heat pipe 43 may be placed in the housing 10 at the time of assembly so that both ends thereof correspond to the two second openings 12 on the housing 10. The two adjacent second openings 12 allow the two ends of the heat pipe 43 to be adjacent to each other to increase the surrounding degree of the heat pipe 43 around the rotation shaft 30 as much as possible. Furthermore, a sealing structure 13 may be provided at the second opening 12, and an end of the heat pipe 43 may extend out of the housing 10 from the second opening 12 through the sealing structure 13 (such as a gasket or a packing) and be connected to other components outside the housing 10, for example, to be circulated with the heat pipe 43 inside the housing 10 through another pipe. The sealing structure 13 ensures the sealing of the housing 10 and the dustproof effect of the fluorescent color wheel module 100.

Of course, the illustration is merely exemplary, and in other embodiments, when the housing 10 is formed by covering a plurality of portions, the shapes of the portions of the housing 10 may be designed to form a space in which the end of the heat pipe 43 protrudes out of the housing 10, and the sealing structure 13 may be disposed in such a space to ensure the sealing of the housing 10.

With continued reference to fig. 1 and 8, in the embodiment shown in the figures, the heat dissipation device 40 may further include a plurality of second heat dissipation fins 42. Each of the second heat dissipating fins 42 is arranged to stand in the housing with respect to the fluorescent color wheel 20, i.e., the plane of the heat dissipating fins 42 is perpendicular to the plane of the fluorescent color wheel 20, and the plurality of second heat dissipating fins 42 are arranged to be at least partially spaced around the rotating shaft 30, forming a radial arrangement around the rotating shaft 30.

On the non-light-receiving surface side (usually, the side where the rotating shaft 30 is located) of the fluorescent color wheel 20 in the housing 10, a space is provided around the rotating shaft 30, and the second heat dissipation fins 42 with a larger heat dissipation surface area are disposed in the space, so that not only the heat dissipation surface area can be increased, but also the space in the housing 10 can be more fully utilized by designing the shape and size of the second heat dissipation fins 42, and the heat dissipation capability can be improved. It is advantageous to have the second heat sink fins 42 perpendicular to the plane of the fluorescent color wheel 20 and at least partially spaced around the rotation axis 30 for improving the efficiency of the gas convection inside the housing 10.

Further, an end of the second heat sink fin 42 away from the rotation shaft 30 is extended to contact with the inner wall of the housing 10, or an end of the second heat sink fin 42 away from the rotation shaft 30 is connected to the inner wall of the housing 10 (for example, by welding or the like). Thus, the second heat dissipation fins 42 can conduct heat with the wall of the housing 10, and the heat conduction positions between the second heat dissipation fins 42 and the housing 10 can be dispersed in combination with the radial arrangement manner about the rotation axis 30, thereby improving the heat dissipation efficiency.

It should be understood that the drawings are merely exemplary, and that the second cooling fins 42 may have other arrangements and arrangements in other embodiments. For example, in the case of several square fin radiators distributed in the housing 10, the fin radiators are independent from each other or connected to each other, and may be connected to the housing 10 or connected to the outside of the housing 10 through a heat conducting member.

In some embodiments, only a portion of the second radiator fins 42 may contact the inner wall of the housing 10, and a portion of the second radiator fins 42 may be connected to the inner wall of the housing 10.

Referring to fig. 8, in the embodiment shown, a contact plate 44 is further disposed at the end of the second heat sink fin 42. The contact piece 44 is located at one end of the second heat dissipation fin 42 away from the rotation shaft 30 and is attached to the inner wall of the housing 10. The contact piece 44 may be disposed parallel to the local surface of the inner wall of the housing 10 or may be curved to fit the local surface of the inner wall of the housing 10, so as to be able to fit the inner wall of the housing 10. By providing the contact pieces 44, the contact area between the second radiator fins 42 and the inner wall of the housing 10 is increased, which is more beneficial to the heat conduction efficiency between the second radiator fins 42 and the housing 10, and is beneficial to the heat of the second radiator fins 42 being conducted to the housing 10 more quickly.

The contact piece 44 may be another component connected to the end of the second radiator fin 42, for example, by welding, clamping, etc. to fixedly connect the contact piece 44 to the end of the second radiator fin 42 away from the rotating shaft 30; the contact piece 44 may also be integrally formed with the second heat sink fins 42, for example, by bending the end of the second heat sink fins 42 away from the rotation shaft 30 to form the contact piece 44.

With continued reference to fig. 1 and 8, in the embodiment shown in the figures, the second cooling fins 42 may be provided with an avoiding notch (not shown), and the avoiding notches of the second cooling fins 42 together form an avoiding groove 45, and at least a portion of the heat pipe 43 may be accommodated in the avoiding groove 45. By avoiding the arrangement of the slots 45, the second heat dissipation fins 42 can fill more space on the non-light-receiving surface side of the fluorescent color wheel 20 in the housing 10, thereby increasing the heat dissipation surface area and improving the space utilization rate in the housing 10. Moreover, such an arrangement is equivalent to at least partially surrounding the heat pipe 43 by the second heat dissipating fin 42, which is more beneficial to improve the heat exchange and transfer effects between the heat pipe 43 and the second heat dissipating fin 42, and is especially beneficial to improve the heat dissipation efficiency of the fluorescent color wheel module 100.

In some embodiments, the second cooling fin 42 may also be in contact with the outer wall of the heat pipe 43. Thus, a heat conduction path between the second cooling fin 42 and the heat pipe 43 is provided, and the cooling efficiency is improved. Of course, in other embodiments, part or all of the second radiator fins 42 may not be in direct contact with the outer wall of the heat pipe 43. For example, the plurality of second radiator fins 42 may be connected by a connection structure, wherein a portion of the second radiator fins 42 contacts the outer wall of the heat pipe 43, and another portion of the second radiator fins 42 does not contact the outer wall of the heat pipe 43, so that the portion of the second radiator fins 42 not in direct contact with the outer wall of the heat pipe 43 may establish a heat conduction path with the heat pipe 43 via the connection structure and the portion of the second radiator fins 42 contacting the outer wall of the heat pipe 43. Of course, in some embodiments, the heat pipe 43 may not be in contact with the second radiator fin 42.

In some embodiments, the second cooling fin 42 may also be connected to the outer wall of the heat pipe 43. That is, the second radiator fins 42 may be fixed to the outer wall of the heat pipe 43 by, for example, welding, and are formed as an integral part of the heat pipe 43. In such a structure, the heat pipe 43 serves as a connecting structure between the plurality of second radiator fins 42, which can simplify the manufacturing of the radiator 40 and the assembly of the radiator 40 in the housing 10. For example, it is possible to simply weld a plurality of second radiator fins 42 to the outer wall of the heat pipe 43 and simply place the heat pipe 43 with the second radiator fins 42 into the case 10.

Referring to fig. 1, in the embodiment shown in the figure, a plurality of third heat dissipation fins 14 may be further disposed on the outer wall of the housing 10. The third heat dissipation fins 14 can increase the heat dissipation surface area of the outer wall of the housing 10, thereby improving the heat dissipation efficiency.

In some embodiments, the third heat sink fins 14 may be disposed on the outer wall of the housing 10 in a region corresponding to the fluorescent area 21 of the fluorescent color wheel 20. That is, the projection of the third heat sink fins 14 on the plane of the fluorescent color wheel 20 at least partially overlaps the fluorescent area 21. Thus, the heat transfer path between the fluorescent region 21 and the third heat sink fins 14 can be shortened, and the heat dissipation efficiency can be improved. For example, as shown in the drawing, a plurality of third radiator fins 14 may be arranged on the outer wall of the housing 10 in a radial ring shape with respect to the rotation axis 30. Such a structure is also advantageous in enhancing the structural strength of the housing 10.

Of course, in other embodiments, the third radiator fins 14 may be arranged in other ways, for example, a single third radiator fin 14 may extend along the radial arc of the outer surface of the housing 10 or extend obliquely; alternatively, a single third radiator fin 14 may extend circumferentially along the outer surface of the housing 10, and a plurality of third radiator fins 14 are arranged at annular intervals.

Referring back to fig. 2, in the embodiment shown in the figure, the fluorescent section 21 may include a ring-shaped area disposed on a side of the fluorescent color wheel 20 facing the light-transmitting portion 11. So that when the fluorescent color wheel 20 rotates, different positions of the annular region are located at corresponding positions of the light-transmitting portion 11. In this case, the fluorescent region 21 may be provided with, for example, a yellow phosphor layer, and when an excitation light beam such as blue laser light is incident on the annular fluorescent region 21, a part of the blue laser light is converted into yellow light. Correspondingly, in the light source system using the fluorescent color wheel module 100 of the embodiments, a spatial light combination scheme may be adopted. For example, the yellow light converted by the fluorescent color wheel module 100 may be mixed with another part of unconverted blue light to obtain white light, which is split by the optical filter into RGB three primary colors of light, and then enters the three spatial light modulators.

Referring back to fig. 3, in some embodiments, the fluorescent area 21 may also include at least two fan-shaped ring segments disposed on a surface of the fluorescent color wheel 20 facing the light-transmitting portion 11, and when the fluorescent color wheel 20 rotates, the fan-shaped ring segments are located at positions corresponding to the light-transmitting portion 11 in time sequence. For example, in the example shown in the figure, the phosphor zones 21 may include a first sector 21a, a second sector 21b and a third sector 21c in the shape of a sector of a circle. The first section 21a may be, for example, a light-transmitting section, and the excitation light beam is incident on the first section 21a without wavelength conversion, or scattering powder may be disposed in the first section 21a to eliminate partial coherence of blue laser light; the second segment 21b may be provided with a orange phosphor layer or a yellow phosphor layer, for example, and generates red light after being excited by blue laser; the third section 21c may be provided with a green phosphor layer, for example, to produce green light upon excitation by a blue laser. As the fluorescent color wheel 20 rotates, the first segment 21a, the second segment 21b and the third segment 21c are sequentially and alternately located at the corresponding positions of the light-transmitting portion 11, receive the incidence of the excitation light beam, and generate sequential blue light, red light and green light. Accordingly, in the light source system using the fluorescent color wheel module 100 of these embodiments, a time-sequence light combination scheme may be adopted.

As will be understood by those skilled in the art, in the embodiment where the fluorescent area 21 on the fluorescent color wheel 20 comprises a light-transmitting section, a light-emitting hole (not shown) may be provided on the housing 10 on the non-light-receiving side of the fluorescent color wheel 20. The light exit hole corresponds to the light transmission portion 11, and may have the same or different structure as the light transmission portion 11. Accordingly, those skilled in the art will understand how the structure of the heat sink can be adapted, for example, leaving a void at a position corresponding to the light-transmitting portion 11 and the light exit hole, to avoid blocking the light path.

In such an embodiment, in order to improve the smoothness of the fluorescent color wheel module 100 during the operation process, two light-transmitting sections may be symmetrically disposed on the fluorescent area 21 of the fluorescent color wheel 20. For example, the phosphor zone 21 comprises six fan-ring shaped segments, including two symmetrical light transmitting segments, two symmetrical red light segments and two symmetrical green light segments. It will be understood by those skilled in the art that the above is merely an example, the fluorescent area 21 may be provided with other numbers of sector-shaped segments, and the function of each segment may be adjusted as required to be located at the corresponding position of the light-transmitting portion 11 according to the rotation timing of the fluorescent color wheel 20.

In another aspect, an embodiment of the present application further provides a light source system. The light source system includes the fluorescent color wheel module 100. The light source system typically further comprises an excitation light source for providing an excitation beam, e.g. a blue laser. In operation, an excitation light beam from the excitation light source passes through the light-transmitting portion 11 of the casing 10 of the fluorescent color wheel module 100 and enters the fluorescent area 21 on the fluorescent color wheel 20, and the fluorescent area 21 is excited to generate fluorescence with a wavelength longer than that of the excitation light source, such as red fluorescence, green fluorescence, and the like. As the fluorescent color wheel 20 rotates, different positions of the fluorescent area 21 are alternately located at corresponding positions of the light-transmitting portion 11 and are irradiated by the excitation light source. The gas on the light receiving surface side of the fluorescent color wheel 20 is heated by the heat generated by the fluorescent area 21 to be higher than the gas on the non-light receiving surface side, and the gas with a large temperature difference on the two sides of the fluorescent color wheel 20 can easily convect through the through hole 23, so that the heat is carried to the non-light receiving surface side of the fluorescent color wheel 20, and is transmitted to the housing 10 and the outside of the housing 10 through the heat dissipation device 40 or other heat dissipation components, thereby realizing efficient heat dissipation. Meanwhile, the sealed housing 10 also effectively ensures the dustproof effect of the fluorescent color wheel module 100. Therefore, the light source system can have longer service life and stable performance.

The above embodiments are merely examples and are not intended to limit the scope of the present disclosure, and all equivalent results or equivalent flow transformations performed by the present disclosure and drawings, or applied to other related technologies directly or indirectly, are included in the scope of the present disclosure.

Claims (15)

1. A fluorescent color wheel module, comprising:

the light-transmitting part is arranged on the shell;

the fluorescent color wheel is positioned in the shell, the middle part of the fluorescent color wheel is connected with the motor through a rotating shaft, and the motor drives the fluorescent color wheel to rotate;

the fluorescent color wheel is provided with a fluorescent area on one surface facing the light transmission part, when the fluorescent color wheel rotates, different positions of the fluorescent area are alternately positioned at corresponding positions of the light transmission part, and in addition, the fluorescent area is positioned at the corresponding positions of the light transmission part

The fluorescent color wheel is also provided with a plurality of through holes; and

at least part of the structure of the heat dissipation device is positioned in the shell and comprises first heat dissipation fins arranged on the opposite surface of the fluorescent area of the fluorescent color wheel, and the first heat dissipation fins are distributed around the rotating shaft.

2. The color wheel assembly as claimed in claim 1, wherein the housing has a first opening, and the light-transmitting portion includes a lens assembly fixed at the first opening and covering the first opening.

3. The color wheel assembly as claimed in claim 2, wherein a transparent lens is fixed in the first opening, and the lens assembly is fixed at the first opening and covers the transparent lens.

4. The fluorescent color wheel assembly of claim 1 wherein the housing comprises an upper shell and a lower shell that are sealed to each other by a connector.

5. The color wheel assembly as claimed in claim 1, wherein the plurality of through holes are symmetrically disposed about the rotation axis.

6. The color wheel assembly as claimed in claim 1, wherein the through hole is located closer to the rotation axis than the fluorescent area, and the ratio D1/D2 of the width D1 of the through hole to the inner diameter D2 of the fluorescent area in the radial direction of the color wheel is greater than or equal to 0.1.

7. The color wheel assembly as claimed in claim 1, wherein each of the first heat dissipation fins extends radially in an arc shape or obliquely in a plane on which the color wheel is disposed.

8. The color wheel assembly as claimed in claim 1, wherein the heat sink includes a heat pipe for containing liquid, the housing has a second opening, an end of the heat pipe extends out of the housing through the second opening to communicate with the outside of the housing, and at least a portion of the heat pipe is disposed around the rotation shaft.

9. The color wheel assembly as claimed in claim 8, wherein the number of the second openings is two, and the two second openings are located adjacent to each other, and two ends of the heat pipe respectively extend out of the two second openings.

10. The color wheel assembly as claimed in claim 8, wherein the heat sink includes a plurality of second heat dissipating fins perpendicular to the plane of the color wheel, the second heat dissipating fins are at least partially spaced around the rotation axis, and at least a portion of an end of the second heat dissipating fins away from the rotation axis extends to contact or connect with the inner wall of the housing.

11. The color wheel assembly as claimed in claim 10, wherein the end of the second heat sink fins away from the rotation shaft is provided with a contact piece attached to the inner wall of the housing, and the contact piece is connected to the second heat sink fins, or the contact piece and the second heat sink fins are integrated.

12. The color wheel assembly as claimed in claim 10, wherein at least some of the second heat fins have an avoiding notch to form an avoiding groove, and at least some of the heat pipes are located in the avoiding groove.

13. The color wheel assembly of claim 12 wherein at least a portion of the second heat sink fins are in contact with and/or fixedly attached to the outer wall of the heat pipe.

14. The fluorescent color wheel module of claim 1,

the fluorescent area comprises an annular area arranged on one surface of the fluorescent color wheel facing the light-transmitting part, and when the fluorescent color wheel rotates, different positions of the annular area are positioned at corresponding positions of the light-transmitting part; or

The fluorescent area comprises at least two fan-shaped sections arranged on one surface of the fluorescent color wheel, which faces the light transmission part, and when the fluorescent color wheel rotates, the fan-shaped sections are sequentially positioned at the corresponding positions of the light transmission part.

15. A light source system, comprising: the fluorescent color wheel module of any one of claims 1-14.

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