CN112015039A

CN112015039A - Prism assembly and projection equipment

Info

Publication number: CN112015039A
Application number: CN201910454884.0A
Authority: CN
Inventors: 周建华; 周正平; 张贤鹏; 余新; 李屹
Original assignee: Appotronics Corp Ltd
Current assignee: Shenzhen Appotronics Corp Ltd
Priority date: 2019-05-29
Filing date: 2019-05-29
Publication date: 2020-12-01
Also published as: WO2020238666A1

Abstract

The application discloses a prism assembly and projection equipment, wherein the prism assembly comprises a prism, a first fixing mechanism and a second fixing mechanism, the prism is of a symmetrical structure and comprises a first prism surface and a second prism surface, and the first prism surface and the second prism surface are symmetrical relative to a first section; the first fixing mechanism is arranged corresponding to the first prism surface and used for mounting the first DMD chip; the second fixing mechanism is arranged corresponding to the second prism surface and used for installing a second DMD chip, wherein the first DMD chip and the second DMD chip are symmetrical about the first section. Through the mode, relative displacement of the first DMD chip and the second DMD chip caused by temperature or external force is equal, probability of dislocation of images projected by the two DMD chips is reduced, and stability of the prism assembly for projecting the images in a long-time use process is improved.

Description

Prism assembly and projection equipment

Technical Field

The application relates to the technical field of optics, in particular to a prism assembly and projection equipment.

Background

In recent years, Liquid Crystal Display (LCD) technology has been limited in some applications, and Digital Light Processing (DLP) technology Display systems have been developed. The core of the DLP projection display mode is to provide a spatial light modulation unit, and a Digital micro lens Device (DMD) as a reflective spatial light modulator occupies a very important position in the projection application field. Compared with the projection type LCD technology, the DLP technology using DMD has more advantages in the aspects of volume, response speed and the like, so the DLP technology has good development prospect in the market.

The DMD chip in the existing prism is easily influenced by external force or temperature to cause the change of the relative position of the DMD chip, so that the dislocation of the projected images of the DMDs is correspondingly caused, and the viewing experience of projection is seriously influenced.

Disclosure of Invention

The application provides a prism subassembly to solve the technical problem of the image dislocation that the DMD chip in the prism subassembly arouses because of temperature or external force.

In order to solve the above technical problem, a technical scheme adopted by the present application is to provide a prism assembly, including:

the prism is a symmetrical structure and comprises a first prism surface and a second prism surface, and the first prism surface and the second prism surface are symmetrical relative to the first section;

the first fixing mechanism is arranged corresponding to the first prism surface and used for mounting a first DMD chip; and

and the second fixing mechanism is arranged corresponding to the second prism surface and used for installing a second DMD chip, wherein the first DMD chip and the second DMD chip are symmetrical about the first section.

In order to solve the above technical problem, another technical solution adopted by the present application is to provide a projection apparatus, which includes a housing and a prism assembly as provided in the above application.

The beneficial effect of this application is: set up first fixed establishment through the first prism face at symmetrical structure's prism, set up second fixed establishment at symmetrical structure's prism's second prism face, and set up first DMD chip and second DMD chip on first fixed establishment and second fixed establishment respectively, make first DMD chip and second DMD chip symmetrical about first section, thereby can make temperature or external force arouse when the DMD chip takes place the displacement, the relative displacement of first DMD chip and second DMD chip equals, the probability that the dislocation takes place for the image that reduces two DMD chips and throw, and then promote the stability that the prism assembly throws the image in long-time use.

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, it is obvious that the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without inventive efforts, wherein:

FIG. 1 is a schematic diagram of a top view of an embodiment of a prism assembly of the present application;

FIG. 2 is a schematic structural diagram of an embodiment of a prism assembly of the present application;

FIG. 3 is a schematic view of the exploded structure of FIG. 2;

FIG. 4 is a schematic view of a portion of an embodiment of a prism assembly according to the present application;

fig. 5 is a schematic structural diagram of a first fixing plate according to an embodiment of the prism assembly of the present application;

fig. 6 is a schematic structural diagram of a second fixing plate according to an embodiment of the prism assembly of the present application;

FIG. 7 is a schematic view of a base structure of an embodiment of the prism assembly of the present application;

FIG. 8 is a schematic view of a cover plate according to an embodiment of the prism assembly of the present application;

FIG. 9 is a schematic diagram of an optical path configuration of an embodiment of a prism assembly of the present application;

FIG. 10 is a schematic diagram of a simulation analysis result according to an embodiment of the prism assembly of the present application;

fig. 11 is a schematic structural diagram of an embodiment of a projection apparatus according to the present application.

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.

Referring to fig. 1, 2 and 3, embodiments of the present application provide a prism assembly 100, the prism assembly 100 comprising: the prism 10, the first fixing mechanism 20, the second fixing mechanism 40, the base 60, the cover plate 70, the first side plate 80, and the second side plate 81.

With continued reference to fig. 1, 2 and 3, the prism 10 may be made of quartz glass, alkali halide crystal, optical glass, or the like. The prism 10 may be formed integrally or may be formed by a plurality of pieces. The prism 10 has a symmetrical structure, and at least includes a first prism surface 11 and a second prism surface 12, where the first prism surface 11 can be an incident surface of light, and the second prism surface 12 can be an incident surface of light, that is, the prism includes at least two incident surfaces of light. Of course, the prism 10 may also include a third prism surface or a fourth prism surface (not shown), such as an exit surface, and the like, and is not limited herein. The terms "first" and "second" in this application are used for descriptive purposes only and are 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 such feature. The first prism face 11 and the second prism face 12 are symmetrical with respect to the first section a. The first fixing mechanism 20 is arranged in correspondence with the first prism face 11, it being understood that the first fixing mechanism 20 is arranged on the opposite side of the first prism face 11. The first fixing mechanism 20 is used to mount the first DMD chip 30, and the mounting manner may be bonding fixing or fixing by a fixing member. The first DMD chip 30 is capable of receiving light from the first prism face 11 and modulating the light to form image light to reflect into the prism 10. The second holding mechanism 40 is disposed in correspondence with the second prism face 12, it being understood that the second holding mechanism 40 is disposed on the opposite side of the second prism face 12. The second fixing mechanism 40 is used to mount the second DMD chip 50, and the mounting manner may be bonding fixing or fixing by a fixing member. The second DMD chip 50 can receive the light from the second prism surface 12 and modulate the light to form image light, and reflect the image light to the prism 10, it can be understood that, after the first DMD chip 30 and the second DMD chip 50 receive the light (without image signals), the light is modulated by the first DMD chip 30 and the second DMD chip 50 to form image light (with image signals), and the image light is reflected to the prism 10 and projected along the same direction, so that the image light overlaps to form an image. Since the optical transmission in the prism assembly 100 has high precision requirement, the first fixing mechanism 20 and the second fixing mechanism 40 may be made of the same material, for example, SUS430 material, or other metal or metal alloy, as long as a stable structure is provided. Wherein, the first DMD chip 30 and the second DMD chip 50 are symmetrical about the first section a, and the first DMD chip 30 and the second DMD chip 50 may have the same structure and type. It can be understood that, since first prism face 11 and second prism face 12 are symmetrical with respect to first section a, the distance from first DMD chip 30 to first prism face 11 is equal to the distance from second DMD chip 50 to second prism face 12. Therefore, when the first DMD chip 30 and the second DMD chip 50 generate heat due to long-time operation or are pushed by an external force, the relative offset displacements of the first DMD chip 30 and the second DMD chip 50 are equal, so that the images projected from the prism 10 by the first DMD chip 30 and the second DMD chip 50 are still overlapped.

The first fixing mechanism 20 is arranged on the first prism surface 11 of the prism 10 with the symmetrical structure, the second fixing mechanism 40 is arranged on the second prism surface 12 of the prism 10 with the symmetrical structure, and the first DMD chip 30 and the second DMD chip 50 are respectively arranged on the first fixing mechanism 20 and the second fixing mechanism 40, so that the first DMD chip 30 and the second DMD chip 50 are symmetrical about the first section A, the relative offset displacement of the first DMD chip and the second DMD chip caused by temperature or external force is equal, the probability that the image light projected between the first DMD chip 30 and the second DMD chip 50 is offset to cause image offset is reduced, and the stability of the prism assembly 100 in projecting images in a long-time use process is further improved.

Alternatively, referring to fig. 1 and 9, the prism 10 may be formed by splicing 6 small prisms, which may respectively include 4 triangular prisms and two rectangular prisms, and the plurality of small prisms are spliced to form a symmetrical structure with respect to the first cross section a. Wherein, first prism face 11 can be the side of one of them triangular prism, second prism face 12 can be the side of another one of them triangular prism, and two four corner prisms constitute 90 degrees angles, and the angle that also does not contact and keep away from two four corner prisms of triangular prism is 45 degrees respectively, and first DMD chip 30 and second DMD chip 50 mutually perpendicular, and also first DMD chip 30 and second DMD chip 50 are about the right angle symmetry to reduce the degree of difficulty of DMD chip installation and debugging. It can be understood that the incident light is divided into two paths through the light splitter 94, enters the first DMD chip 30 and the second DMD chip 50 through the triangular prism, is reflected to the four-corner prism by the first DMD chip 30 and the second DMD chip 50, and finally exits through the same four-corner prism. Of course, in other embodiments, the first DMD chip 30 and the second DMD chip 50 may not be right-angle symmetric, for example, may be symmetric at an angle of 60 degrees, 120 degrees, or 145 degrees, and are not limited herein.

Referring to fig. 2 and 3, the prism assembly 100 can further include a base 60 and a cover plate 70. The base 60 and the lid 70 may be made of the same material, for example, SUS430, but may be made of other metals or metal alloys. The prism 10 is provided on the base 60, and may be fixed to the base 60 by, for example, bonding. The cover plate 70 is disposed opposite to the base 60 to cover the prism 10. Of course, the base 60 and the cover plate 70 may be hollowed out separately, for example, 3 holes are correspondingly hollowed out, so as to reduce the weight of the entire prism assembly 100, reduce the material cost, and facilitate the heat dissipation of the prism assembly 100. The first securing mechanism 20 is connected to the base 60 and the cover 70, respectively, the second securing mechanism 40 is connected to the base 60 and the cover 70, respectively, and the first securing mechanism 20 is adjacent to the second securing mechanism 40. In this way, the base 60 and the cover plate 70 can be stably supported, so that the prism assembly 100 has a more stable structure. In the description of the present application, it should be noted that unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "disposed at … …" are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrally connected; may be a mechanical connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood as appropriate by those of ordinary skill in the art.

With continued reference to fig. 3, the first fixing mechanism 20 may include a first fixing plate 21, a first mounting plate 22, and a first fixing member 23. The first fixing member 23 connects the first fixing plate 21 and the first mounting plate 22. The first fixing plate 21 connects the base 60 and the cover plate 70 by using a fixing member (not shown), bonding, clipping, or the like. First mounting plate 22 is used to mount first DMD chip 30. The center of the first mounting plate 22 can be provided with a recess for accommodating the first DMD chip 30, so that the first DMD chip 30 can be prevented from protruding out of the first mounting plate 22, and the volume of the prism assembly 100 is effectively reduced. The second fixing mechanism 40 may include a second fixing plate 41, a second mounting plate 42, and a second fixing member 43. The second fixing member 43 connects the second fixing plate 41 and the second mounting plate 42, and the second fixing plate 41 connects the base 60 and the cover plate 70, which may be by using a fixing member (not shown), bonding, or clipping. Second mounting plate 42 is used to mount second DMD chip 50. The center of second mounting plate 42 also can be provided with the depressed part and be used for holding second DMD chip 50 to can avoid second DMD chip 50 to stick out second mounting plate 42, effectively reduced prism assembly 100's volume. Through setting up first DMD chip 30 on first mounting panel 22, set up the second DMD chip on second mounting panel 42, rethread first fixed plate 21 and second fixed plate 41 are connected to base 60 and apron 70 on to prism 10 has been increased to the distance between first DMD chip 30 and the second DMD chip, be favorable to the transmission of light, and reduce DMD chip temperature direct contact prism 10 and cause the influence to prism 10.

Alternatively, the thicknesses of the first fixing plate 21 and the second fixing plate 41 may be the same, and the thicknesses of the first mounting plate 22 and the second mounting plate 42 are the same, so that when external force or temperature changes, the relative displacement variation of the mounting plates and the fixing plates to the DMD chip is equal. A first gap is left between the first fixing plate 21 and the first mounting plate 22, and a second gap is left between the second fixing plate 41 and the second mounting plate 42. For example, a plurality of spacers (not shown) may be bonded between the first fixing plate 21 and the first mounting plate 22, and a plurality of spacers (not shown) may be bonded between the second fixing plate 41 and the second mounting plate 42. The first and second gaps are equal in width, which may be 1 mm, 1.5 mm, 2 mm, or the like. The distance from the first DMD chip 30 to the first prism surface 11 is equal to the distance from the second DMD chip 50 to the second prism surface 12. In this way, the first fixing plate 21 and the first mounting plate 22, and the second fixing plate 41 and the second mounting plate 42 are spaced apart, thereby reducing the direct conduction of heat from the DMD chip to the prism 10 or the base 60 or the cover plate 70.

In some embodiments, referring to fig. 4 and 5, the first fixing plate 21 may be provided with first fixing holes 211, and the first fixing holes 211 may be oppositely disposed at two ends of the first fixing plate 21, and the number of the first fixing holes may be 4 or 6. The first mounting plate 22 may be provided with second fixing holes 221, and the second fixing holes 221 may be stepped. The second fixing holes 221 and the first fixing holes 211 are correspondingly identical in position and number. The first fixing member 23 may include a first fixing rod 231 and a first collar 232, the first fixing rod 231 may be a pin, a gasket is further disposed on the pin, and the first collar 232 may be a glass ring or the like. The first fixing rod 231 penetrates through the first fixing hole 211 and the second fixing hole 221, and the first collar 232 is sleeved on the first fixing rod 231 and is accommodated in the stepped second fixing hole 221, so that the first collar 232 is flush with the surface of the first mounting plate 22, that is, the first collar 232 can be hidden on the surface of the first mounting plate 22, and therefore the volume of the first fixing mechanism 20 can be effectively reduced. Wherein, the diameter of the second fixing hole 221 is equal to the diameter of the first fixing rod 231. The surface of the first collar 232 is provided with a first dispensing area, the first dispensing area is used for filling curing glue to fix the first fixing element 23, the first fixing plate 21 and the first mounting plate 22, for example, the first dispensing area may be natural curing glue or epoxy resin, and of course, the first dispensing area may also be correspondingly arranged on the first fixing rod 231 or the first mounting plate 22, and is not limited herein, as long as the adhesive fixation can be further achieved. It can be understood that the first fixing member 23, the first fixing plate 21 and the first mounting plate 22 can be firmly fixed together by connecting the first fixing rod 231 and the first collar 232, and finally bonding the first fixing plate 21 and the first mounting plate 22 by a curing adhesive. Of course, the surface of the first fixing bar 231 may be provided with a knurled structure, thereby further enhancing the strength of the bonding.

Alternatively, referring to fig. 6, the second fixing plate 41 may be provided with third fixing holes 411, and the third fixing holes 411 may be oppositely disposed at two ends of the second fixing plate 41, and the number thereof may be 4 or 6. The second mounting plate 42 is provided with a fourth fixing hole 421, the fourth fixing hole 421 may be stepped, and the positions and the number of the fourth fixing hole 421 and the third fixing hole 411 are correspondingly the same. The second fixing member 43 may include a second fixing rod 431 and a second collar 432, the second fixing rod 431 may be a pin, a gasket is further provided on the pin, and the second collar 432 may be a glass ring or the like. The second fixing rod 431 penetrates through the third fixing hole 411 and the fourth fixing hole 421, and the second sleeve 432 is sleeved on the second fixing rod 431 and is accommodated in the stepped fourth fixing hole, so that the second sleeve 432 is flush with the surface of the second mounting plate 42, that is, the second sleeve 432 can be hidden on the surface of the second mounting plate 42, and therefore the volume of the second fixing mechanism 40 can be effectively reduced. The diameter of the fourth fixing hole 421 is larger than the diameter of the second fixing rod 431, so that the position of the second mounting plate 42 relative to the second fixing plate 41 is adjustable. The surface of the second collar 432 is provided with a second dispensing area, and the second dispensing area is used for filling curing glue to fix the second fixing member 43, the second fixing plate 41 and the second mounting plate 42, for example, the second dispensing area may be natural curing glue or epoxy resin. Of course, a second dispensing area may be disposed on the second fixing rod 431 or the second mounting plate 42, and is not limited herein as long as the adhesive fixing can be further achieved. It can be understood that the second fixing bar 41 and the second mounting plate 42 are connected by the second fixing bar 431 and the second collar 432, and finally bonded by the curing glue, so that the second fixing member 43, the second fixing bar 41 and the second mounting plate 42 can be firmly fixed together. Of course, the surface of the second fixing rod 431 may be further provided with a knurled structure, thereby further enhancing the strength of the adhesion. By making the specific fixing modes of the first fixing mechanism 20 and the second fixing mechanism 40 identical, the consistency of the two is ensured, so that the influence of external force or temperature on the first fixing mechanism 20 and the second fixing mechanism 40 is identical, and finally the offset displacement is also identical.

Alternatively, continuing to refer to fig. 4, 5 and 6, the base 60 and the cover plate 70 may be respectively provided with a first positioning hole 61 and a second positioning hole 71 corresponding to the side surfaces of the first fixing plate 21, and the number of the positioning holes may be 1, 2 or 3. The base 60 and the cover plate 70 are respectively provided with a third positioning hole 62 and a fourth positioning hole 72 corresponding to the side surfaces of the second fixing plate 41, and the number of the third positioning holes and the fourth positioning holes can be 1, 2 or 3. The first fixing plate 21 is provided with fifth positioning holes 212, the number of the fifth positioning holes 212 may be 3 or 4, and the fifth positioning holes 212 are located between adjacent first fixing holes 211. The second fixing plate 41 is provided with sixth positioning holes 412, the number of the sixth positioning holes 412 can be 3 or 4, etc., the sixth positioning holes 412 are located between the adjacent third fixing holes 411, and the first long guiding columns 90 penetrate through the fifth positioning holes 212 to the first positioning holes 61 and the second positioning holes 71 to position the first fixing plate 21 on the base 60 and the cover plate 70. The second long guiding column 92 penetrates through the sixth positioning hole 412 to the third positioning hole 62 and the fourth positioning hole 72 to position the second fixing plate 41 on the base 60 and the cover plate 70. It can be understood that when the installation, the high accuracy location requirement of DMD chip can be satisfied through the mounting means of locating hole and guide bar, avoids the installation error to appear, does not receive the restriction of 10 side structures of prism through the installation of above-mentioned mode simultaneously, and then promotes the installation effectiveness.

Alternatively, referring to fig. 5, 6, 7 and 8, the side of the base 60 facing the cover plate 70 may be provided with first adhesion regions 63, and the number of the first adhesion regions 63 may be a plurality of intervals, and the number may be 6, 7, 8, 10, or the like, and is not limited herein. The side of the cover plate 70 facing the base 60 may be provided with second adhesion regions 73, and the number of the second adhesion regions 73 may be a plurality of interval arrangements, and the number may be 6, 7, 8, or 10, and the like, and is not limited herein. A third adhesive region 213 is provided on the side of the first fastening plate 21 facing away from the first mounting plate 22. The first fixing plate 21 may be provided at the center with a large through hole having a similar rectangular shape for receiving the center portion of the first mounting plate 22, and the third adhesive region 213 may be located between the fifth positioning hole 212 and the large through hole. A fourth adhesion area 413 is disposed on a side of the second fixing plate 41 away from the second mounting plate 42, a large through hole similar to a rectangle may also be disposed in the center of the second fixing plate 41 for receiving the center portion of the second mounting plate 42, and the fourth adhesion area 413 may be located between the sixth positioning hole 412 and the large through hole. The first, second, third and fourth

adhesive regions

63, 73, 213 and 413 are used to place a glue material, such as epoxy or UV glue, to adhere the prism 10. By the mode, the prism 10 can be firmly fixed from multiple angles, and the risk that the prism 10 is loosened is reduced.

In some embodiments, referring to fig. 2, 3, and 4, the prism assembly 100 can further comprise a first side plate 80 and a second side plate 81. The centers of the first side plate 80 and the second side plate 81 are opened with a large through hole (not shown) so that the light in the prism 10 can be projected. The first side plate 80 connects the base 60 and the cover plate 70 and is disposed opposite to the first fixing mechanism 20, and the second side plate 81 connects the base 60 and the cover plate 70 and is disposed opposite to the second fixing mechanism 40. The first side plate 80 and the second side plate 81 can be fixedly connected by fasteners (e.g., bolts or screws) inserted through holes in the side walls of the base 60 and the cover plate 70. The base 60 and the cover plate 70 are further supported by the first side plate 80 and the second side plate 81, and the base 60 and the cover plate 70 are prevented from crushing the prism 10. The base 60, the cover plate 70, the first fixing plate 21, the second fixing plate 41, the first side plate 80 and the second side plate 81 are enclosed to form a stable hollow structure, a space for accommodating the prism 10 is reserved in the hollow structure, and the inner surface of one side facing the space is coated with matting paint or is subjected to blackening treatment to eliminate stray light emitted by the prism, so that the image contrast projected by the prism 10 is improved.

Optionally, the first side plate 80 and the prism 10 may be parallel to each other with a third gap left therebetween, and the second side plate 81 may be parallel to the prism 10 with a fourth gap left therebetween, in this way, the first side plate 80 and the second side plate 81 can ensure that the first side plate 80 and the second side plate 81 block the stray light from entering and exiting, and on the other hand, when the temperature rises, the first side plate 80 and the second side plate 81 are heated and expand to cause the compression damage to the prism 10.

Optionally, a narrow thin adhesive strip may be adhered to the gap between the base 60, the cover 70, the first side plate 80 and the second side plate 81 to form a seal, so as to prevent glue from penetrating into the prism 10 during gluing, and reduce dust from entering the space of the prism 10. Certainly, a heat sink (not shown) may be further disposed behind the first DMD chip 30 and the second DMD chip 50, where the heat sink is composed of an aluminum heat sink, a heat pipe, and copper heat dissipation fins, the aluminum heat sink contacts with the back of the first DMD chip 30 and the second DMD chip 50, and a heat conduction pad (not shown) is disposed on the contact surface, and the heat transferred to the heat sink is conducted to the copper heat dissipation fins by the heat pipe to be dissipated.

Referring to fig. 10, the offset displacement of the first DMD chip 30 relative to the first prism face 11, the displacement of the second DMD chip 50 relative to the second prism face 12 are obtained under simulation experiments (for example, in ansys software), wherein the prism assembly 100 in fig. 10 omits the first fixing mechanism 20 and the second fixing mechanism 40, a1 represents the displacement along the Y-axis direction, b1 represents the displacement along the X-axis direction, c1 represents the displacement along the Z-axis direction, the center of the circle in the figure represents the direction perpendicular to the paper plane, and since the first chip 30 and the second chip 50 are symmetrical with respect to the first cross section a, a2 represents the displacement along the X-axis direction, b2 represents the displacement along the Y-axis direction, and c2 represents the displacement along the Z-axis direction. Here, the displacement value of a1 is equal to the displacement value of a2, the displacement value of b1 is equal to the displacement value of b2, and the displacement value of c1 is equal to the displacement value of c2, that is, the displacement of the first DMD chip 30 is the same as that of the second DMD chip 50. Therefore, the offset directions of the images projected by the two DMD chips are consistent due to the thermal deformation of the first DMD chip 30 and the second DMD chip 50 and the relative movement generated by the first prism surface 11 and the second prism surface 12 of the prism 10, and the offset displacements are kept synchronous, so that the stable superposition of the projected images of the first DMD chip 30 and the second DMD chip 50 can be effectively ensured even when the environmental temperature changes, and the risk of image dislocation is reduced.

Referring to fig. 11, the present application further provides a projection apparatus 200, wherein the projection apparatus 200 includes a housing 210 and the prism assembly 100 according to the above embodiment connected to the housing 210, and the prism assembly 100 is disposed in the housing 210. For details of the prism assembly 100, reference may be made to the description of the above embodiments, and further description is omitted here.

The above description is only for the purpose of illustrating embodiments of the present application and is not intended to limit the scope of the present application, and all modifications of equivalent structures and equivalent processes, which are made by the contents of the specification and the drawings of the present application or are directly or indirectly applied to other related technical fields, are also included in the scope of the present application.

Claims

1. A prism assembly, comprising:

2. The prism assembly of claim 1, wherein the prism assembly further comprises:

a base on which the prism is disposed;

the cover plate is arranged opposite to the base, and the prism is covered on the cover plate;

the first fixing mechanism is respectively connected with the base and the cover plate, the second fixing mechanism is respectively connected with the base and the cover plate, and the first fixing mechanism is adjacent to the second fixing mechanism.

3. The prism assembly according to claim 1, wherein the first fixing mechanism comprises a first fixing plate, a first mounting plate and a first fixing member, the first fixing member connects the first fixing plate and the first mounting plate, the first fixing plate connects the base and the cover plate, the first mounting plate is used for mounting the first DMD chip, the second fixing mechanism comprises a second fixing plate, a second mounting plate and a second fixing member, the second fixing member connects the second fixing plate and the second mounting plate, the second fixing plate connects the base and the cover plate, and the second mounting plate is used for mounting the second DMD chip.

4. The prism assembly of claim 3, wherein the first and second fixed plates have the same thickness, the first and second mounting plates have the same thickness, a first gap is left between the first fixed plate and the first mounting plate, a second gap is left between the second fixed plate and the mounting plate, the first and second gaps have the same width, and the distance from the first DMD chip to the first prism face is the same as the distance from the second DMD chip to the second prism face.

5. The prism assembly according to claim 4, wherein the first fixing plate is provided with a first fixing hole, the first mounting plate is provided with a second fixing hole, the second fixing hole is stepped, the first fixing member comprises a first fixing rod and a first collar, the first fixing rod penetrates through the first fixing hole and the second fixing hole, the first collar is sleeved in the first fixing rod and is attached to the surface of the first mounting plate, the diameter of the second fixing hole is equal to the diameter of the first fixing rod, the surface of the first collar is provided with a first dispensing area, and the first dispensing area is filled with curing glue to fix the first fixing member, the first fixing plate and the first mounting plate.

The second fixed plate is equipped with the third fixed orifices, the second mounting panel is equipped with the fourth fixed orifices, the fourth fixed orifices is the echelonment, the second mounting includes the second dead lever and the second lantern ring, the second dead lever is worn to establish the third fixed orifices with the fourth fixed orifices, the second lantern ring cover is gone into the second dead lever and is pasted the surface of second mounting panel, wherein, the aperture of fourth fixed orifices is greater than the diameter of second fixed rod is so that the second mounting panel is relative the position of second fixed plate is adjustable, second lantern ring surface is equipped with the second and glues the district, the second is glued the district and is used for filling solidification to glue with the second mounting the second fixed plate with the second mounting panel is fixed.

6. The prism assembly according to any one of claims 1 to 5, wherein the base and the cover plate have first positioning holes on the side surfaces thereof corresponding to the first fixing plate, the base and the cover plate have second positioning holes on the side surfaces thereof corresponding to the second fixing plate, the first fixing plate has third positioning holes between adjacent first fixing holes, the second fixing plate has fourth positioning holes between adjacent third fixing holes, first long guide posts penetrate through the first positioning holes and the third positioning holes to position the first fixing plate on the base and the cover plate, and second long guide posts penetrate through the second positioning holes and the fourth positioning holes to position the second fixing plate on the base and the cover plate.

7. The prism assembly of claim 6, wherein a side of the base facing the cover plate is provided with a first adhesive region, a side of the cover plate facing the base is provided with a second adhesive region, a side of the first fixing plate facing away from the first mounting plate is provided with a third adhesive region, and a side of the second fixing plate facing away from the second mounting plate is provided with a fourth adhesive region, and the first adhesive region, the second adhesive region, the third adhesive region, and the fourth adhesive region are used for placing a glue material to adhere the prisms.

8. The prism assembly according to claim 2, further comprising a first side plate and a second side plate, wherein the first side plate is connected to the base and the cover plate and disposed opposite to the first fixing mechanism, and the second side plate is connected to the base and the cover plate and disposed opposite to the second fixing mechanism, wherein the base, the cover plate, the first fixing plate, the second fixing plate, the first side plate and the second side plate enclose a space for accommodating the prism, and an inner surface of a side facing the space is coated with a matting paint or blackened.

9. The prism assembly of claim 8, wherein the first side plate is parallel to the prism with a third gap therebetween, and the second side plate is parallel to the prism with a fourth gap therebetween.

10. A projection device comprising a housing and the prism assembly of any of claims 1-9 coupled to the housing, the prism assembly being disposed within the housing.