CN110568708A

CN110568708A - projection device and light source

Info

Publication number: CN110568708A
Application number: CN201910860290.XA
Authority: CN
Inventors: 逄相来
Original assignee: Qingdao Hisense Laser Display Co Ltd
Current assignee: Qingdao Hisense Laser Display Co Ltd
Priority date: 2019-09-11
Filing date: 2019-09-11
Publication date: 2019-12-13
Anticipated expiration: 2039-09-11
Also published as: CN110568708B

Abstract

the application discloses projection equipment belongs to projection technical field. The projection device includes: the light source comprises a main shell, a dichroic mirror adjusting mechanism, a dichroic mirror, a lens adjusting mechanism, a lens assembly, a fluorescent wheel and a light-emitting device. The first open end and the ray apparatus system of the main casing body are connected, and the ray apparatus system is connected with the camera lens, and the second open end and the luminescent device of the main casing body are connected, and dichroic mirror adjustment mechanism, dichroic mirror, lens adjustment mechanism, lens subassembly and fluorescence wheel are located the inner chamber of the main casing body. The application provides a projection equipment can adjust the focus of the light beam after the lens subassembly assembles on the fluorescence face of fluorescence wheel through lens adjustment mechanism, therefore can furthest arouse the phosphor layer on the fluorescence face, can furthest improve the luminance of the emergent light beam of light source and the quality of color, and then improve projection equipment's projection quality.

Description

Projection device and light source

Technical Field

The application relates to the technical field of projection, in particular to projection equipment and a light source.

Background

A projection apparatus is a display apparatus for generating a projection picture. At present, a projection apparatus mainly includes a light source, an optical-mechanical system and a lens, where the light source is configured to provide a light beam for the optical-mechanical system, and the optical-mechanical system is configured to modulate the light beam provided by the light source and emit the modulated light beam to the lens to obtain a projection image. The brightness and color of the light beam emitted from the light source are critical indicators for determining the projection quality of the projection device.

the light source generally comprises optical devices such as a laser, a dichroic mirror, a lens assembly, a fluorescent wheel and the like, and in the assembling process of the light source, the brightness and the color of the emergent light beam of the light source can be ensured only when the actual assembling position of each optical device is superposed with the theoretical assembling position, so that the projection quality of the projection equipment is ensured.

However, on one hand, since the assembly precision of each optical device is difficult to guarantee, and on the other hand, the processing precision of each optical device itself is also difficult to guarantee, the actual assembly position of each optical device often deviates from the theoretical assembly position, and the brightness and color of the light beam emitted by the light source are seriously affected, so that the projection quality of the projection equipment is reduced.

disclosure of Invention

the application provides a projection device, which can solve the problem that the projection quality of the projection device is low. The technical scheme is as follows:

in one aspect, a projection apparatus is provided, the projection apparatus comprising:

the light source comprises a main shell, a dichroic mirror adjusting mechanism, a dichroic mirror, a lens adjusting mechanism, a lens assembly, a fluorescent wheel and a light-emitting device;

The optical-mechanical system is used for receiving the light beam emitted by the light source, modulating the light beam emitted by the light source and emitting the modulated light beam to the lens;

The lens is used for receiving the light beam emitted by the optical machine system;

The first opening end of the main shell is connected with the optical-mechanical system, the optical-mechanical system is connected with the lens, the second opening end of the main shell is connected with the light-emitting device, and the dichroic mirror adjusting mechanism, the dichroic mirror, the lens adjusting mechanism, the lens assembly and the fluorescent wheel are positioned in the inner cavity of the main shell;

The dichroic mirror is used for reflecting the light beams emitted by the light emitting device and emitting the reflected light beams on the lens assembly, the dichroic mirror adjusting mechanism is used for adjusting the center of a light spot formed on the lens assembly by the light beams reflected by the dichroic mirror to a main optical axis of the lens assembly, the lens assembly is used for converging the reflected light beams, the lens adjusting mechanism is used for adjusting the focus of the light beams converged by the lens assembly to a fluorescent surface of the fluorescent wheel, and the fluorescent wheel is used for transmitting and discoloring the incident light beams.

Optionally, the lens assembly comprises: a first lens member;

The first lens component is fixed on the lens adjusting mechanism, the first lens component is positioned between the fluorescent wheel and the dichroic mirror, and the main optical axis of the first lens component is vertical to the fluorescent surface of the fluorescent wheel;

The first lens component is used for carrying out convergence processing on the light beams reflected by the dichroic mirror.

Optionally, the lens assembly further comprises a second lens member;

the second lens component is fixed on the lens adjusting mechanism, the fluorescent wheel is positioned between the second lens component and the first lens component, the main optical axis of the second lens component is vertical to the plane of the fluorescent wheel, and the second lens component is used for converging the light beams passing through the fluorescent wheel.

Optionally, the first lens component includes a plano-convex lens and a meniscus lens, and the lens adjusting mechanism includes a lens holder, a space clamp spring, a first fixing member and a second fixing member;

The lens support is adjustably fixed in the inner cavity of the main shell, a stepped hole is formed in the lens support, the step surfaces of the stepped hole face the dichroic mirror, the plane of the plano-convex lens and the concave surface of the concave-convex lens face the step surfaces of the stepped hole, and the concave-convex lens is located between the plano-convex lens and the fluorescent wheel;

the space jump ring cover is in on the convex surface of plano-convex lens, first mounting with the second mounting all with lens holder fixed connection, the space jump ring be used for with plano-convex lens is spacing on the first step face of shoulder hole, the space jump ring can block first mounting the inner wall of shoulder hole with in the cavity that plano-convex lens's convex surface formed, the second mounting be used for with meniscus is spacing on the second step face of shoulder hole.

Optionally, the bottom surface of the lens support is provided with a plurality of first positioning posts and one or more first threaded holes, and the main housing is provided with a first oblong hole corresponding to each first positioning post and a second oblong hole corresponding to each first threaded hole;

the length direction of the first long round hole and the length direction of the second long round hole are parallel to the main optical axis of the first lens component, each first positioning column extends into the corresponding first long round hole, and the lens support and the main shell can be fixedly connected based on each second long round hole and the corresponding first threaded hole.

optionally, a positioning table is further disposed on the bottom surface of the lens support, a guide hole corresponding to the positioning table is disposed on the main housing, a first limiting wall is disposed on the outer wall of the main housing, and the light source further includes one or more first limiting blocks;

the positioning table penetrates through the guide hole and extends out of the main casing body, the length of the guide hole is larger than that of the positioning table, the length direction of the guide hole is perpendicular to the plane where the fluorescent wheel is located, each first limiting block in the one or more first limiting blocks is used for limiting the distance between the positioning table and the first limiting wall, and the distance limited by each first limiting block is different.

optionally, the dichroic mirror adjusting mechanism includes a dichroic mirror holder and a third fixing member;

the dichroic mirror support is adjustably fixed on the main shell, a frame body matched with the dichroic mirror is arranged on the dichroic mirror support, and the dichroic mirror is fixed on the frame body through the third fixing piece.

Optionally, the dichroic mirror support is provided with a fixing plate;

The plane of the fixing plate is perpendicular to the plane of the frame body, the fixing plate is provided with a limiting hole, an arc hole and one or more fixing holes, and the main shell is provided with a second positioning column corresponding to the limiting hole, a third positioning column corresponding to the arc hole and a second threaded hole corresponding to each fixing hole;

The second positioning column extends into the limiting hole, the third positioning column extends into the arc hole, the fixing plate can use the second positioning column as a rotating shaft, the arc hole rotates in a limiting track of the third positioning column, and the fixing plate and the main shell can be fixedly connected based on each fixing hole and a corresponding second threaded hole.

Optionally, a second limiting wall is arranged on the outer wall of the main housing, and the light source further includes one or more second limiting blocks;

Each of the one or more second limiting blocks is used for limiting the rotation angle of the fixing plate, and the rotation angle defined by each second limiting block is different.

in another aspect, there is provided a light source, including: the device comprises a main shell, a dichroic mirror adjusting mechanism, a dichroic mirror, a lens adjusting mechanism, a lens assembly, a fluorescent wheel and a light-emitting device;

The main shell is connected with the light-emitting device, and the dichroic mirror adjusting mechanism, the dichroic mirror, the lens adjusting mechanism, the lens assembly and the fluorescent wheel are positioned in an inner cavity of the main shell;

the dichroic mirror is used for reflecting the light beams emitted by the light emitting device and emitting the reflected light beams on the lens assembly, the dichroic mirror adjusting mechanism is used for adjusting the center of a light spot formed on the lens assembly by the light beams reflected by the dichroic mirror to a main optical axis of the lens assembly, the lens assembly is used for converging the reflected light beams, the lens adjusting mechanism is used for adjusting the focus of the light beams converged by the lens assembly to a fluorescent surface of the fluorescent wheel, and the fluorescent wheel is used for performing color change treatment on the color-changed light beams.

The beneficial effects brought by the technical scheme provided by the embodiment of the application at least can comprise:

The dichroic mirror adjusting mechanism is used for adjusting the center of a light spot formed on the lens assembly by the light beam reflected by the dichroic mirror to the main optical axis of the lens assembly. In addition, since the lens adjusting mechanism is used for adjusting the focus of the light beam converged by the lens assembly to the fluorescent surface of the fluorescent wheel, it can be understood that when the focus of the light beam converged by the lens assembly is on the fluorescent surface of the fluorescent wheel, the fluorescent powder layer on the fluorescent surface can be excited to the maximum extent. Therefore, the light beams can be respectively adjusted by the dichroic mirror adjusting mechanism and the lens adjusting mechanism, so that the brightness and the color quality of the light beams emitted by the light source are improved to the maximum extent, and the light beams have high-quality brightness and color. The light beam can then pass through an opto-mechanical system and a lens in sequence to be directed onto a screen. Obviously, through the projection equipment that this application embodiment provided, can improve the luminance of the emergent light beam of light source and the quality of color to improve projection equipment's projection quality, and then improve user experience.

drawings

in order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a projection apparatus provided in an embodiment of the present application;

fig. 2 is a schematic structural diagram of a light source provided in an embodiment of the present application;

FIG. 3 is a schematic structural diagram of a lens assembly and a lens adjustment mechanism provided in an embodiment of the present application;

fig. 4 is a schematic structural diagram of a space clamp spring provided in an embodiment of the present application;

FIG. 5 is a schematic structural diagram of a lens holder according to an embodiment of the present disclosure;

Fig. 6 is a schematic structural diagram of an inner cavity of a main housing according to an embodiment of the present disclosure;

Fig. 7 is a schematic structural diagram of an outer wall of a main housing according to an embodiment of the present application;

fig. 8 is a schematic structural diagram of a dichroic mirror holder provided in an embodiment of the present application.

Reference numerals:

1: a light source; 2: an opto-mechanical system; 3: a lens;

11: a main housing; 12: a dichroic mirror adjusting mechanism; 13: a dichroic mirror; 14: a lens adjusting mechanism; 15: a lens assembly; 16: a fluorescent wheel; 17: a light emitting device; 18: a first stopper; 19: a second limiting block;

111: a first oblong hole; 112: a second oblong hole; 113: a guide hole; 114: a first limit wall; 115: a second positioning column; 116: a third positioning column; 117: a second threaded hole; 118: a second limiting wall;

121: a dichroic mirror support; 122: a third fixing member;

141: a lens holder; 142: a space clamp spring; 143: a first fixing member; 144: a second fixing member;

151: a first lens member; 152: a second lens member;

1211: a frame body; 1212: a fixing plate;

1411: a first step surface; 1412: a second step surface; 1413: a first positioning post; 1414: a first threaded hole; 1415: a positioning table;

1511: a plano-convex lens; 1512: a meniscus lens;

12121: a limiting hole; 12122: a circular arc hole; 12123: and (7) fixing holes.

Detailed Description

to make the objects, technical solutions and advantages of the present application more clear, embodiments of the present application will be described in further detail below with reference to the accompanying drawings.

Fig. 1 is a schematic structural diagram of a projection apparatus provided in an embodiment of the present application, and fig. 2 is a schematic structural diagram of a light source provided in an embodiment of the present application. Referring to fig. 1 and 2, the projection apparatus may include: the light source 1 includes a main housing 11, a dichroic mirror adjusting mechanism 12, a dichroic mirror 13, a lens adjusting mechanism 14, a lens assembly 15, a fluorescent wheel 16, and a light emitting device 17. And the optical-mechanical system 2 is used for receiving the light beam emitted by the light source 1, modulating the light beam emitted by the light source 1 and emitting the modulated light beam to the lens 3. And the lens 3 is used for receiving the light beam emitted by the optical-mechanical system 2. The first open end of main casing body 11 is connected with optical-mechanical system 2, and optical-mechanical system 2 is connected with camera lens 3, and the second open end of main casing body 11 is connected with light emitting device 17, and dichroic mirror adjustment mechanism 12, dichroic mirror 13, lens adjustment mechanism 14, lens subassembly 15 and fluorescence wheel 16 are located the inner chamber of main casing body 11.

The dichroic mirror 13 is used for reflecting the light beam emitted by the light emitting device 17 and emitting the reflected light beam on the lens assembly 15, the dichroic mirror adjusting mechanism 12 is used for adjusting the center of a light spot formed on the lens assembly 15 by the light beam reflected by the dichroic mirror 13 to the main optical axis of the lens assembly 15, the lens assembly 15 is used for converging the reflected light beam, the lens adjusting mechanism 14 is used for adjusting the focus of the light beam converged by the lens assembly 15 to the fluorescent surface of the fluorescent wheel 16, and the fluorescent wheel 16 is used for transmitting and discoloring the incident light beam.

In the embodiment of the present application, the dichroic mirror adjusting mechanism 12 is used to adjust the center of a light spot formed on the lens assembly 15 by the light beam reflected by the dichroic mirror 13 to the main optical axis of the lens assembly 15. In addition, since the lens adjusting mechanism 14 is used to adjust the focus of the light beam converged by the lens assembly 15 onto the fluorescent surface of the fluorescent wheel 16, it can be understood that when the focus of the light beam converged by the lens assembly 15 is on the fluorescent surface of the fluorescent wheel 16, the fluorescent powder layer on the fluorescent surface can be excited to the maximum extent. Therefore, by adjusting the dichroic mirror adjusting mechanism 12 and the lens adjusting mechanism 14, the quality of the brightness and color of the light beam emitted from the light source 1 can be improved to the maximum extent, so that the light beam has high quality brightness and color. The light beam can then pass through the opto-mechanical system 2 and the lens 3 in turn to be directed onto the screen. Obviously, through the projection equipment that this application embodiment provided, because can improve the quality of the luminance and the color of the light beam of light source 1 outgoing greatly, therefore can improve projection equipment's projection quality greatly, and then improvement user experience that can be great.

when the light source is used, firstly, the light beam emitted by the light emitting device 17 is reflected by the dichroic mirror 13, and the reflected light beam is emitted on the lens assembly 15, at this time, if the center of a light spot formed by the reflected light beam on the lens assembly 15 is not on the main optical axis of the lens assembly 15, then the center of the light spot formed by the reflected light beam on the lens assembly 15 can be adjusted to the main optical axis of the lens assembly 15 by the dichroic mirror adjusting mechanism 12, so as to improve the brightness of the light beam. The lens assembly 15 then focuses the reflected light beam to form a focal point, and then, assuming that the focal point is not on the fluorescent surface of the fluorescent wheel 16, the focal point can be adjusted to the fluorescent surface of the fluorescent wheel 16 by the lens adjusting mechanism 14 to improve the excitation efficiency of the light beam on the fluorescent surface. Thus, the brightness and color quality of the light beam emitted from the light source 1 can be improved. The light beam with high quality brightness and color is then sequentially incident on the screen through the opto-mechanical system 2 and the lens 3. Finally, the user can enjoy high-quality display effect, and the user experience can be obviously greatly improved.

The light emitting device 17 may be a laser or other light emitting devices, which is not specifically limited in this embodiment.

For ease of understanding, the operation of the light source 1 will be briefly described by taking the example of the light emitting device 17 emitting blue light. Firstly, blue light emitted by the light emitting device 17 reaches the dichroic mirror 13, the dichroic mirror 13 reflects the blue light emitted by the light emitting device 17, and emits the reflected blue light on the lens assembly 15, then the lens assembly 15 converges the reflected blue light, and adjusts the focus of the converged blue light to the fluorescent wheel, wherein a part of the blue light contacts with the fluorescent surface of the fluorescent wheel 16, and reflects red light and green light under the action of the fluorescent surface, and then the red light and the green light pass through the dichroic mirror 13 and enter the optical-mechanical system 2. Meanwhile, another part of the blue light which is not in contact with the fluorescent surface of the fluorescent wheel 16 passes through the fluorescent wheel 16 and reaches the dichroic mirror 13 under the action of the reflecting mirror arranged in the main housing 11, and finally, the dichroic mirror 13 reflects the part of the blue light into the optical-mechanical system 2.

As can be seen from the above description, the blue light contacting the fluorescent surface of the fluorescent wheel 16 can be color-changed by the fluorescent surface of the fluorescent wheel 16, and is reflected to the dichroic mirror 13, and then passes through the dichroic mirror 13 to enter the opto-mechanical system 2. The blue that is not in contact with the fluorescent surface of the fluorescent wheel 16 passes directly through the fluorescent wheel 16 and enters the opto-mechanical system 2 under the reflection of the dichroic mirror 13 and the mirror provided in the main housing 11. In other words, a portion of the blue light is discolored and reflected by the fluorescent wheel 16, and a portion of the blue light passes through the fluorescent wheel 16 directly.

It should be noted that the number of the reflecting mirrors disposed in the main housing 11 may be 1, or may be other numbers, and only the blue light passing through the fluorescence wheel 16 needs to be reflected to the dichroic mirror 13, which is not specifically limited in the embodiment of the present application.

It should be noted that the main housing 11 may be connected to the optical mechanical system 2 by screws or may be connected to the optical mechanical system 2 by other methods, and only the light beam emitted from the light source 1 may enter the optical mechanical system 2 and may be modulated by the optical mechanical system 2, which is not specifically limited in this embodiment of the present application. The specific structure of the optical-mechanical system 2 may refer to related technologies, and the embodiments of the present application are not described herein again.

In addition, the optical-mechanical system 2 can be connected with the lens 3 through screws or connected with the lens 3 through other modes, and only the optical-mechanical system 2 needs to emit the modulated light beam to the lens 3.

It should be further noted that, the fluorescent wheel 16 may be fixed in the inner cavity of the main housing 11 by screws, or may be fixed in the inner cavity of the main housing 11 by other manners, as long as it is ensured that the focal point of the light beam converged by the lens assembly is adjusted to the fluorescent surface of the fluorescent wheel, which is not specifically limited in the embodiment of the present application.

in some embodiments, referring to fig. 3, the lens assembly 15 may include: the first lens member 151. The first lens member 151 is fixed to the lens adjusting mechanism 14, the first lens member 151 is located between the fluorescent wheel 16 and the dichroic mirror 13, and the main optical axis of the first lens member 151 is perpendicular to the fluorescent surface of the fluorescent wheel 16. The first lens member 151 is used to perform a condensing process on the light beam reflected by the dichroic mirror 13.

It can be seen that the light beams reflected by the dichroic mirror 13 can be subjected to the convergence processing by the first lens member 151, and the focus of the light beams subjected to the convergence processing is ensured to be located on the fluorescent surface of the fluorescent wheel 16. However, in an actual scenario, the assembling position of the fluorescent wheel 16 may deviate from the theoretical assembling position, so that the focus of the converged light beam cannot be located on the fluorescent surface of the fluorescent wheel 16. As can be seen from the above, since the lens adjusting mechanism 14 can adjust the position in the inner cavity of the main housing 11, and in addition, since the first lens member 151 is fixed on the lens adjusting mechanism 14, the position of the first lens member 151 can be adjusted by adjusting the lens adjusting mechanism 14, so as to ensure that the focus of the light beam converged by the first lens member 151 is located on the fluorescent surface of the fluorescent wheel 16.

The first lens member 151 may be fixed to the lens adjustment mechanism 14 by screws, or may be fixed to the lens adjustment mechanism 14 by other means, which is not specifically limited in the embodiments of the present application.

further, in some embodiments, referring to fig. 3, the lens assembly 15 may also include a second lens member 152. The second lens component 152 is fixed on the lens adjusting mechanism 14, the fluorescent wheel 16 is positioned between the second lens component 152 and the first lens component 151, the main optical axis of the second lens component 152 is vertical to the plane of the fluorescent wheel 16, and the second lens component 152 is used for converging the light beams passing through the fluorescent wheel 16.

As can be seen from the foregoing description, a portion of the light beam is discolored and reflected by the fluorescent wheel 16. Another portion of the light beam passes through the fluorescent wheel 16 directly to the second lens member 152, and when the light beam passing through the fluorescent wheel 16 reaches the second lens member 152, the second lens member 152 can converge the light beam passing through the fluorescent wheel 16 and continue to propagate the light beam.

The second lens member 152 may be fixed to the lens adjustment mechanism 14 by screws, or may be fixed to the lens adjustment mechanism 14 by other methods, which is not specifically limited in the embodiments of the present application.

In some embodiments, with continued reference to fig. 3, the first lens member 151 may include a plano-convex lens 1511 and a meniscus 1512, and the lens adjustment mechanism 14 includes a lens holder 141, a space circlip 142, a first mount 143, and a second mount 144. The lens holder 141 is adjustably fixed in the inner cavity of the main housing 11, a stepped hole is provided on the lens holder 141, the stepped surfaces of the stepped hole face the dichroic mirror 13, the flat surface of the planoconvex lens 1511 and the concave surface of the meniscus lens 1512 face the stepped surfaces of the stepped hole, and the meniscus lens 1512 is located between the planoconvex lens 1511 and the fluorescent wheel 16. The space clamp spring 142 is sleeved on the convex surface of the plano-convex lens 1511, the first fixing piece 143 and the second fixing piece 144 are both fixedly connected with the lens support 141, the space clamp spring 142 is used for limiting the plano-convex lens 1511 on the first step surface 1411 of the stepped hole, the space clamp spring 142 can be clamped in a cavity formed by the first fixing piece 143, the inner wall of the stepped hole and the convex surface of the plano-convex lens 1511, and the second fixing piece 144 is used for limiting the concave-convex lens 1512 on the second step surface 1412 of the stepped hole.

Since the lens support 141 is adjustably fixed in the inner cavity of the main housing 11, the lens support 141 is provided with the stepped hole, the planoconvex lens 1511 is limited on the first stepped surface 1411 of the stepped hole, and the meniscus lens 1512 is limited on the second stepped surface 1412 of the stepped hole, the positions of the planoconvex lens 1511 and the meniscus lens 1512 relative to the fluorescent wheel 16 can be adjusted by adjusting the position of the lens support 141, and the focus of the light beam converged by the planoconvex lens 1511 and the meniscus lens 1512 is adjusted to the fluorescent surface of the fluorescent wheel 16.

however, in the process of converging the light flux into one focal point by the first lens member 151, the energy density is sharply increased, and the heat density is also sharply increased, so that the plano-convex lens 1511 and the meniscus lens 1512 included in the first lens member 151 are both thermally expanded and increased, and may be crushed by the lens holder 141.

Based on this, taking the process of converging the light beam to a focus by the first lens member 151 as an example, continuing with the above-described embodiment, when the planoconvex lens 1511 and the meniscus 1512 thermally expand, and continuing with fig. 3, on one hand, there may occur a squeezing between the sidewall of the planoconvex lens 1511 and the inner wall of the stepped hole corresponding to the first stepped surface 1411 where the planoconvex lens 1511 is located, resulting in a fracture of the planoconvex lens 1511. Similarly, on the other hand, there is a possibility that the meniscus 1512 may be broken due to the squeezing between the sidewall of the meniscus 1512 and the inner wall of the stepped hole corresponding to the second stepped surface 1412 on which the meniscus 1512 is located.

in order to solve the above problem, in some scenarios, in combination with field experience, the meniscus 1512 is usually thermally expanded to a small extent, and the amount of expansion of the meniscus can be ignored, while the plano-convex lens 1511 is usually thermally expanded to a large extent, so that it is possible to prevent a lens breakage phenomenon that may occur due to thermal expansion of the plano-convex lens. In the exemplary embodiment provided in the present application, the plano-convex lens 1511 may be retained on the first step surface 1411 of the stepped hole by the space clamp spring 142. Specifically, the space clamp spring 142 is sleeved on the convex surface of the planoconvex lens 1511 and clamped in a cavity formed by the first fixing piece 143, the inner wall of the stepped hole and the convex surface of the planoconvex lens 1511, and the planoconvex lens 1511 is fixed on the first stepped surface 1411 by the space clamp spring 142 under the action of the first fixing piece 143.

At this time, assuming that the thermal expansion of the plano-convex lens 1511 becomes large, which means that the plano-convex lens 1511 undergoes thermal expansion in both the axial direction and the radial direction, referring to fig. 4, since the space clamp spring 142 has a spiral space structure that is broken end to end, the deformation of the plano-convex lens 1511 in the axial direction can be freely expanded in the axial direction by compressing the height of the space clamp spring 142 in the axial direction, thereby avoiding the occurrence of the situation that the plano-convex lens 1511 is limited in expansion in the axial direction and is crushed. The deformation of the plano-convex lens 1511 in the radial direction can be achieved by enlarging the diameter of the space clamp spring 142, so that the plano-convex lens 1511 can freely expand in the radial direction, and further the situation that the plano-convex lens 1511 is limited in expansion in the radial direction and is broken due to extrusion is avoided.

As is apparent from the above description, by providing the space circlip 142, it is possible to ensure free expansion of the plano-convex lens 1511 in the axial direction and the radial direction, and therefore, it is possible to avoid the occurrence of the situation in which the plano-convex lens 1511 is crushed in the axial direction and the radial direction and broken.

Certainly, in other scenarios, if the thermal expansion of the meniscus 1512 is also large, the meniscus 1512 can be prevented from being broken due to extrusion by providing a structure similar to the space clip 142, and the implementation manner of the method is similar to the manner of preventing the plano-convex lens 1511 from being broken due to extrusion, which is not described again in this embodiment of the present application.

It should be noted that the first fixing element 143 may include a first fixing screw and a first fixing ring, so that the first fixing ring may be pressed against the space clamp spring 142 and buckled on the end surface of the stepped hole, and then the first fixing ring is fixed on the lens support through the first fixing screw, so as to limit the planoconvex lens 1511 on the first stepped surface 1411.

similarly, the second fixing member 144 may include a second fixing screw and a second fixing ring, so that the second fixing ring may be pressed against the convex surface of the meniscus and buckled on the step surface of the stepped hole, and the second fixing ring is fixed on the lens support 141 by the second fixing screw, thereby achieving the purpose of limiting the meniscus 1512 on the second step surface 1412.

In the embodiment of the present application, when the lens support 141 is adjustably fixed in the inner cavity of the main housing 11, in some embodiments, referring to fig. 5 and 6, the bottom surface of the lens support 141 may be provided with a plurality of first positioning posts 1413 and one or more first threaded holes 1414, and the main housing 11 is provided with a first elongated hole 111 corresponding to each first positioning post 1413 and a second elongated hole 112 corresponding to each first threaded hole 1414. The length direction of the first elongated hole 111 and the length direction of the second elongated hole 112 are both parallel to the main optical axis of the first lens member 151, each first positioning column 1413 extends into the corresponding first elongated hole 111, and the lens support 141 and the main housing 11 can be fixedly connected based on each second elongated hole 112 and the corresponding first threaded hole 1414.

in this way, when adjusting the position of the lens holder 141, the adjusting lens holder 141 can be moved back and forth in the longitudinal direction of the first oblong hole 111 by the guiding action of the plurality of first positioning posts 1413 and the plurality of first oblong holes 111 corresponding thereto. In addition, after the position of the lens support 141 is adjusted to a proper position, the lens support 141 can be fixedly connected in the inner cavity of the main housing 11 based on each second elongated hole 112 and the corresponding first threaded hole 1414, so as to achieve the purpose of adjustably fixing the lens support 141 in the inner cavity of the main housing 11.

It should be noted that the lens support 141 and the main housing 11 may be fixedly connected by screws based on each second oblong hole 112 and the corresponding first threaded hole 1414, or may be fixedly connected by other manners, which is not specifically limited in this embodiment of the present invention.

It should be noted that the number of the first positioning pillars 1413 may be 2, or may be other numbers, which is not specifically limited in the embodiment of the present application. In addition, the number of the first threaded holes 1414 may be 2, or may be other numbers, which is not specifically limited in the embodiments of the present application.

when the position of the lens holder 141 is adjusted in the above manner, it is not energetically adjusted. Based on this, in some embodiments, referring to fig. 5 and 7, the bottom surface of the lens support 141 may further be provided with a positioning table 1415, the main housing 11 may be provided with a guide hole 113 corresponding to the positioning table 1415, the outer wall of the main housing 11 is provided with a first limiting wall 114, and the light source 1 further includes one or more first limiting blocks 18 (not shown in the figure). The positioning table 1415 penetrates through the guide hole 113 and extends out of the main housing 11, the length of the guide hole 113 is greater than that of the positioning table 1415, the length direction of the guide hole 113 is perpendicular to the plane of the fluorescent wheel 16, each first limiting block 18 of the one or more first limiting blocks 18 is used for limiting the distance between the positioning table 1415 and the first limiting wall 114, and the distance limited by each first limiting block 18 is different.

In this way, when adjusting the position of the lens holder 141, the corresponding first stopper 18 may be placed between the first stopper wall 114 and the positioning table 1415 based on the expected adjustment position, and then the lens holder 141 may be adjusted such that the first stopper 18 is clamped between the positioning table 1415 and the first stopper wall 114, at which point the lens holder 141 may be considered to be adjusted to the expected adjustment position.

The number of the first stoppers 18 may be multiple, and the distance defined by each first stopper 18 is different, so that when the lens holder 141 needs to be moved to a specific distance, the first stopper 18 that can define the specific distance can be selected from the multiple first stoppers 18. Obviously, with the plurality of first stoppers 18, the lens holder 141 can be adjusted in a quantified manner.

For convenience of understanding, the first stopper 18 may be understood as small blocks with different lengths, and the position of the lens holder 141 is adjusted quantitatively by clamping the small blocks with different lengths between the first stopper wall 114 and the positioning table 1415.

in some embodiments, referring to fig. 8, the dichroic mirror adjusting mechanism 12 may include a dichroic mirror holder 121 and a third fixing piece 122. The dichroic mirror holder 121 is fixed to the main casing 11 in an adjustable manner, a frame 1211 matching the dichroic mirror 13 is provided on the dichroic mirror holder 121, and the dichroic mirror 13 is fixed to the frame 1211 by a third fixing member 122.

It should be noted that the dichroic mirror holder 121 may be adjustably fixed to the main housing 11 by providing an elongated hole on the main housing 11, or may be fixed to the main housing 11 by other methods, which is not specifically limited in the embodiment of the present application.

In addition, in some embodiments, the third fixing member 122 may include a third screw and a third fixing elastic piece, and then the dichroic mirror 13 may be clamped between the third fixing piece and the frame 1211, and pass through the third fixing piece by the third screw, so as to achieve the purpose of clamping and fixing the dichroic mirror 13 on the frame 1211 through the third fixing member 122.

in the embodiment of the present application, when the dichroic mirror holder 121 is adjustably fixed to the main housing 11, in some embodiments, referring to fig. 7 and 8, the dichroic mirror holder 121 may be provided with a fixing plate 1212. The plane of the fixing plate 1212 is perpendicular to the plane of the frame 1211, the fixing plate 1212 is provided with a limit hole 12121, an arc hole 12122 and one or more fixing holes 12123, and the main housing 11 is provided with a second positioning post 115 corresponding to the limit hole 12121, a third positioning post 116 corresponding to the arc hole 12122, and a second threaded hole 117 corresponding to each fixing hole 12123. The second positioning column 115 extends into the limiting hole 12121, the third positioning column 116 extends into the circular arc hole 12122, the fixing plate 1212 can rotate within the limiting track of the circular arc hole 12122 to the third positioning column 116 with the second positioning column 115 as a rotating shaft, and the fixing plate 1212 and the main housing 11 can be fixedly connected based on each fixing hole 12123 and the corresponding second threaded hole 117.

when adjusting the position of the dichroic mirror holder 121, the fixing plate 1212 is rotated, and the fixing plate 1212 can rotate in the limit trajectory of the circular arc hole 12122 to the third positioning column 116 by using the second positioning column 115 as a rotating shaft, and after the dichroic mirror holder 121 reaches a proper position, the dichroic mirror holder 121 can be fixedly connected to the inner cavity of the main housing 11 based on each fixing hole 12123 and the corresponding second threaded hole 117, so that the dichroic mirror holder 121 can be adjustably fixed to the inner cavity of the main housing 11.

It should be noted that each fixing hole 12123 and the corresponding second threaded hole 117 between the fixing plate 1212 and the main housing 11 may be fixedly connected by a screw, or may be fixedly connected by other manners, which is not specifically limited in this embodiment of the present invention.

It should be noted that the number of the fixing holes 12123 may be 2, or may be other numbers, which is not specifically limited in the embodiments of the present application.

however, when the position of the dichroic mirror holder 121 is adjusted in the above manner, the adjustment is not energetically performed. Based on this, referring to fig. 7, the outer wall of the main housing 11 may be provided with a second limiting wall 118, and the light source 1 further includes one or more second limiting blocks 19 (not shown). Each of the one or more second stoppers 19 is used to limit a rotation angle of the fixing plate 1212, and the rotation angle defined by each second stopper 19 is different.

like this, when adjusting the position of dichroic mirror holder 121, can place corresponding second stopper 19 between fixed plate 1212 and second stopper wall 118 based on the angle of expected adjustment, then rotate dichroic mirror holder 121 for second stopper 19 is by the centre gripping between fixed plate 1212 and second stopper wall 118, and at this moment, can regard dichroic mirror holder 121 to be adjusted to the angle department of expected adjustment.

the number of the second limiting blocks 19 may be multiple, and the rotation angle that each second limiting block 19 can define is different, so that when the dichroic mirror support 121 needs to be adjusted to a specific angle, the second limiting block 19 that can define the specific angle can be selected from the multiple second limiting blocks 19. Obviously, the lens holder 141 can be adjusted quantitatively by the plurality of second stoppers 19.

for the sake of understanding, the second limiting block 19 may be understood as a trapezoid block having a right angle with the surface contacting the second limiting wall 118 and an inclined angle with the surface contacting the fixing plate 1212, each inclined angle being different, so that the angle of the dichroic mirror holder 121 may be limited by the trapezoid block.

Fig. 2 is a schematic structural diagram of a light source according to an embodiment of the present application. Referring to fig. 2, the light source may include: a main casing 11, a dichroic mirror adjusting mechanism 12, a dichroic mirror 13, a lens adjusting mechanism 14, a lens assembly 15, a fluorescent wheel 16, and a light emitting device 17. The main housing 11 is connected to a light emitting device 17, and a dichroic mirror adjusting mechanism 12, a dichroic mirror 13, a lens adjusting mechanism 14, a lens assembly 15, and a fluorescent wheel 16 are located in an inner cavity of the main housing 11.

the dichroic mirror 13 is used for reflecting the light beam emitted by the light emitting device 17 and emitting the reflected light beam on the lens assembly 15, the dichroic mirror adjusting mechanism 12 is used for adjusting the center of a light spot formed on the lens assembly 15 by the light beam reflected by the dichroic mirror 13 to the main optical axis of the lens assembly 15, the lens assembly 15 is used for converging the reflected light beam, the lens adjusting mechanism 14 is used for adjusting the focus of the light beam converged by the lens assembly 15 to the fluorescent surface of the fluorescent wheel 16, and the fluorescent wheel 16 is used for performing color change processing on the color-changed light beam.

It should be noted that, the light-emitting device 17, the dichroic mirror adjusting mechanism 12, the lens adjusting mechanism 14, and the lens assembly 15 in the embodiments of the present application may be specifically described in the above embodiments, and the embodiments of the present application are not described herein again.

In the embodiment of the present application, the dichroic mirror adjusting mechanism 12 is used to adjust the center of a light spot formed on the lens assembly 15 by the light beam reflected by the dichroic mirror 13 to the main optical axis of the lens assembly 15. In addition, since the lens adjusting mechanism 14 is used to adjust the focus of the light beam converged by the lens assembly 15 onto the fluorescent surface of the fluorescent wheel 16, it can be understood that when the focus of the light beam converged by the lens assembly 15 is on the fluorescent surface of the fluorescent wheel 16, the fluorescent powder layer on the fluorescent surface can be excited to the maximum extent. Therefore, by adjusting the dichroic mirror adjusting mechanism 12 and the lens adjusting mechanism 14, the quality of the brightness and color of the light beam emitted from the light source 1 can be improved to the maximum extent, so that the light beam has high quality brightness and color.

The above description is only exemplary of the present application and should not be taken as limiting, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A projection device, characterized in that the projection device comprises:

The light source (1) comprises a main shell (11), a dichroic mirror adjusting mechanism (12), a dichroic mirror (13), a lens adjusting mechanism (14), a lens assembly (15), a fluorescent wheel (16) and a light-emitting device (17);

the optical mechanical system (2) is used for receiving the light beam emitted by the light source (1), modulating the light beam emitted by the light source (1) and emitting the modulated light beam to the lens (3);

The lens (3) is used for receiving the light beam emitted by the optical-mechanical system (2);

The first open end of the main shell (11) is connected with the optical-mechanical system (2), the optical-mechanical system (2) is connected with the lens (3), the second open end of the main shell (11) is connected with the light-emitting device (17), and the dichroic mirror adjusting mechanism (12), the dichroic mirror (13), the lens adjusting mechanism (14), the lens assembly (15) and the fluorescent wheel (16) are positioned in the inner cavity of the main shell (11);

The dichroic mirror (13) is used for reflecting the light beams emitted by the light emitting device (17) and emitting the reflected light beams on the lens assembly (15), the dichroic mirror adjusting mechanism (12) is used for adjusting the center of a light spot formed on the lens assembly (15) by the light beams reflected by the dichroic mirror (13) to the main optical axis of the lens assembly (15), the lens assembly (15) is used for converging the reflected light beams, the lens adjusting mechanism (14) is used for adjusting the focus of the light beams converged by the lens assembly (15) to the fluorescent surface of the fluorescent wheel (16), and the fluorescent wheel (16) is used for transmitting and discoloring the incident light beams.

2. the projection device according to claim 1, wherein the lens assembly (15) comprises: a first lens member (151);

The first lens component (151) is fixed on the lens adjusting mechanism (14), the first lens component (151) is positioned between the fluorescent wheel (16) and the dichroic mirror (13), and the main optical axis of the first lens component (151) is vertical to the fluorescent surface of the fluorescent wheel (16);

the first lens component (151) is used for carrying out convergence processing on the light beams reflected by the dichroic mirror (13).

3. The projection device of claim 2, wherein the lens assembly (15) further comprises a second lens member (152);

The second lens component (152) is fixed on the lens adjusting mechanism (14), the fluorescent wheel (16) is positioned between the second lens component (152) and the first lens component (151), the main optical axis of the second lens component (152) is vertical to the plane of the fluorescent wheel (16), and the second lens component (152) is used for carrying out convergence processing on the light beams passing through the fluorescent wheel (16).

4. A projection device as claimed in claim 2 or 3, characterized in that the first lens member (151) comprises a plano-convex lens (1511) and a meniscus lens (1512), and the lens adjustment mechanism (14) comprises a lens holder (141), a space circlip (142), a first holder (143) and a second holder (144);

The lens support (141) is adjustably fixed in the inner cavity of the main shell (11), a stepped hole is formed in the lens support (141), the step surface of the stepped hole faces the dichroic mirror (13), the plane of the plano-convex lens (1511) and the concave surface of the concave-convex lens (1512) face the step surface of the stepped hole, and the concave-convex lens (1512) is located between the plano-convex lens (1511) and the fluorescent wheel (16);

Space jump ring (142) cover on the convex surface of plano-convex lens (1511), first mounting (143) with second mounting (144) all with lens support (141) fixed connection, space jump ring (142) be used for with plano-convex lens (1511) are spacing on first step face (1411) of shoulder hole, space jump ring (142) can block in first mounting (143), the inner wall of shoulder hole with in the cavity that the convex surface of plano-convex lens (1511) formed, second mounting (144) are used for with meniscus lens (1512) are spacing on second step face (1412) of shoulder hole.

5. the projection apparatus according to claim 4, wherein the bottom surface of the lens holder (141) is provided with a plurality of first positioning posts (1413) and one or more first threaded holes (1414), and the main housing (11) is provided with a first oblong hole (111) corresponding to each first positioning post (1413) and a second oblong hole (112) corresponding to each first threaded hole (1414);

the length direction of the first long round hole (111) and the length direction of the second long round hole (112) are both parallel to the main optical axis of the first lens component (151), each first positioning column (1413) extends into the corresponding first long round hole (111), and the lens support (141) and the main shell (11) can be fixedly connected based on each second long round hole (112) and the corresponding first threaded hole (1414).

6. The projection apparatus according to claim 5, wherein the bottom surface of the lens holder (141) is further provided with a positioning table (1415), the main housing (11) is provided with a guide hole (113) corresponding to the positioning table (1415), the outer wall of the main housing (11) is provided with a first limiting wall (114), and the light source (1) further comprises one or more first limiting blocks (18);

the positioning table (1415) penetrates through the guide hole (113) and extends out of the main shell (11), the length of the guide hole (113) is larger than that of the positioning table (1415), the length direction of the guide hole (113) is perpendicular to the plane where the fluorescent wheel (16) is located, each first limiting block (18) in the one or more first limiting blocks (18) is used for limiting the distance between the positioning table (1415) and the first limiting wall (114), and the distance limited by each first limiting block (18) is different.

7. The projection apparatus according to claim 1, wherein the dichroic mirror adjusting mechanism (12) includes a dichroic mirror holder (121) and a third fixing member (122);

the dichroic mirror support (121) is adjustably fixed on the main casing (11), a frame body (1211) matched with the dichroic mirror (13) is arranged on the dichroic mirror support (121), and the dichroic mirror (13) is fixed on the frame body (1211) through the third fixing piece (122).

8. a projection device as claimed in claim 7, characterized in that the dichroic mirror holder (121) is provided with a fixing plate (1212);

the plane where the fixing plate (1212) is located is perpendicular to the plane where the frame body (1211) is located, a limiting hole (12121), an arc hole (12122) and one or more fixing holes (12123) are arranged on the fixing plate (1212), and a second positioning column (115) corresponding to the limiting hole (12121), a third positioning column (116) corresponding to the arc hole (12122) and a second threaded hole (117) corresponding to each fixing hole (12123) are arranged on the main shell (11);

The second positioning column (115) extends into the limiting hole (12121), the third positioning column (116) extends into the arc hole (12122), the fixing plate (1212) can rotate in a limiting track of the arc hole (12122) to the third positioning column (116) by taking the second positioning column (115) as a rotating shaft, and the fixing plate (1212) and the main casing (11) can be fixedly connected based on each fixing hole (12123) and the corresponding second threaded hole (117).

9. The projection apparatus according to claim 8, wherein a second stop wall (118) is provided on an outer wall of the main housing (11), the light source (1) further comprising one or more second stop blocks (19);

Each second limiting block (19) in the one or more second limiting blocks (19) is used for limiting the rotating angle of the fixing plate (1212), and the rotating angle defined by each second limiting block (19) is different.

10. a light source, comprising: the device comprises a main shell (11), a dichroic mirror adjusting mechanism (12), a dichroic mirror (13), a lens adjusting mechanism (14), a lens assembly (15), a fluorescent wheel (16) and a light-emitting device;

the main shell (11) is connected with the light-emitting device (17), and the dichroic mirror adjusting mechanism (12), the dichroic mirror (13), the lens adjusting mechanism (14), the lens assembly (15) and the fluorescent wheel (16) are positioned in an inner cavity of the main shell (11);

the dichroic mirror (13) is used for reflecting the light beam emitted by the light emitting device (17) and emitting the reflected light beam on the lens assembly (15), the dichroic mirror adjusting mechanism (12) is used for adjusting the center of a light spot formed on the lens assembly (15) by the light beam reflected by the dichroic mirror (13) to the main optical axis of the lens assembly (15), the lens assembly (15) is used for converging the reflected light beam, the lens adjusting mechanism (14) is used for adjusting the focus of the light beam converged by the lens assembly (15) to the fluorescent surface of the fluorescent wheel (16), and the fluorescent wheel (16) is used for performing color change processing on the color-changed light beam.