CN211826681U - Prism assembly and projector - Google Patents
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- CN211826681U CN211826681U CN202020591727.2U CN202020591727U CN211826681U CN 211826681 U CN211826681 U CN 211826681U CN 202020591727 U CN202020591727 U CN 202020591727U CN 211826681 U CN211826681 U CN 211826681U
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Abstract
The application provides a prism assembly and a projector, wherein the prism assembly comprises a split prism, a first reinforcing plate, a second reinforcing plate, a first cover plate and a second cover plate; the spliced prism comprises a plurality of prism monomers, each prism monomer comprises a first end face, a second end face and a plurality of side faces, the first end face and the second end face are opposite, the side faces are connected with the first end face and the second end face, and an air gap is formed between the side faces of two adjacent prism monomers; the first reinforcing plate and the second reinforcing plate are respectively adhered to the first end face and the second end face and cover each air gap, and the materials of the first reinforcing plate and the second reinforcing plate are the same as those of the prism monomer; the first cover plate and the second cover plate are respectively bonded on the first end face and the second end face and avoid air gaps, and the first cover plate and the first reinforcing plate and the second cover plate and the second reinforcing plate are mutually spaced and filled with soft glue to realize clearance isolation. The prism subassembly that this application provided has good structural stability, can effectively deal with the influence that temperature and stress variation produced.
Description
Technical Field
The application relates to the technical field of projection display, in particular to a prism assembly and a projector.
Background
At present, a DMD (Digital Micromirror Device) system is mainly used in a projector on the market to combine with a prism system to realize projection, in order to improve the brightness of a displayed image, the volume of the DMD can be increased to improve the heat dissipation capacity of the DMD to ensure high-brightness output, and a plurality of DMDs can be matched together to perform spatial light modulation output, so that the output brightness can be multiplied. In the related art, in order to maintain a relatively stable spatial position with the prism system, the DMD systems are prevented from generating a dislocation of projected images due to a position change of each DMD component, and the DMD components are often directly fixed to the prism system, so that the prism system bears a large stress. The prism system is often formed by gluing a plurality of prism monomers, and for a spliced prism bearing large stress, when the change of stress and temperature is responded, the structural stability and the installation precision of the prism system cannot be ensured, and improvement is urgently needed.
SUMMERY OF THE UTILITY MODEL
An object of the present application is to provide a prism assembly and a projector to solve the above problems.
The embodiment of the application realizes the aim through the following technical scheme.
In one aspect, the present application provides a prism assembly comprising a split prism, a first reinforcing plate, a second reinforcing plate, and a first cover plate and a second cover plate; the spliced prism comprises a plurality of prism monomers, each prism monomer comprises a first end face, a second end face and a plurality of side faces, the first end face and the second end face are opposite, the side faces are connected with the first end face and the second end face, and an air gap is formed between the side faces of two adjacent prism monomers; the first reinforcing plate is adhered to the first end face and covers each air gap, and the second reinforcing plate is adhered to the second end face and covers each air gap and is used for reinforcing the plurality of prism monomers; the first reinforcing plate and the second reinforcing plate are made of the same material as the prism single bodies, so that relative displacement among the prism single bodies is avoided when the temperature changes; the first cover plate and the second cover plate are respectively bonded on the first end face and the second end face and avoid air gaps, the first cover plate and the first reinforcing plate are mutually spaced and filled with soft rubber to realize clearance isolation, and the second cover plate and the second reinforcing plate are mutually spaced and filled with soft rubber to realize clearance isolation.
In one embodiment, the first cover plate includes a first base and a first boss, the first base and the first end face are spaced from each other and filled with soft glue, the first boss is arranged on the first base and spaced from the first reinforcing plate, and the first boss and the first end face are bonded by hard glue; the second cover plate comprises a second base and a second boss, the second base and the second end faces are spaced from each other and filled with soft glue, the second boss is arranged on the second base and spaced from the second reinforcing plate, and the second boss and the second end faces are bonded through hard glue.
In one embodiment, the first base is provided with a first mounting groove, and the first reinforcing plate and the first mounting groove are mutually spaced and filled with soft glue; the second base is provided with a second mounting groove, and the second reinforcing plate and the second mounting groove are mutually spaced and filled with soft glue.
In one embodiment, the first reinforcing plate is bonded to the first end face by a hard glue, and the second reinforcing plate is bonded to the second end face by a hard glue.
In one embodiment, the stiff gum has an elastic modulus greater than or equal to 200 MPa; the elastic modulus of the soft rubber is less than or equal to 10 MPa.
In one embodiment, the first reinforcing plate and the second reinforcing plate are each rectangular parallelepiped.
In one embodiment, the plurality of prism single bodies comprises two first prism single bodies, two second prism single bodies and two third prism single bodies, the side surfaces of the two first prism single bodies are bonded without gaps to form a light splitting surface, and the two first prism single bodies are symmetrical about the light splitting surface; two second prism monomers are symmetrical about the light splitting plane, and air gaps are formed between the side surfaces of the adjacent first prism monomers and the side surfaces of the second prism monomers through glue dispensing; the two third prism monomers are symmetrical about the light splitting surface, and air gaps are formed between the side surfaces of the adjacent second prism monomers and the side surfaces of the adjacent third prism monomers through glue dispensing.
In one embodiment, the number of the first reinforcing plates is two, and the two first reinforcing plates are symmetrical about the light splitting surface and are respectively adhered to the first prism single body, the second prism single body and the third prism single body on two sides of the light splitting surface; the two second reinforcing plates are symmetrical about the light splitting surface and are respectively bonded to the first prism monomer, the second prism monomer and the third prism monomer on two sides of the light splitting surface.
A plurality of prism monomers include first prism monomer, second prism monomer and third prism monomer, the third prism monomer respectively with adjacent first prism monomer with form through the point is glued between the free side of second prism the air-gap, a plurality of prism monomers still include fourth prism monomer and fifth prism monomer, fourth prism monomer and fifth prism monomer set up in the free same side of first prism, and range upon range of setting from top to bottom of fourth prism monomer and fifth prism monomer.
In another aspect, the present application further provides a projector including the prism assembly described above.
In one embodiment, the projector further includes two or three spatial light modulators respectively disposed at two or three sides of the plurality of prism units.
Compared with the prior art, prism subassembly and projecting apparatus that this application embodiment provided, support and fix a position the amalgamation prism through first apron and second apron, adopt simultaneously and strengthen board and second with the first enhancement board that the prism monomer material is the same and strengthen every air gap between the board to the prism monomer and carry out the auxiliary reinforcement, in additional strengthening structure stability, because prism monomer and first enhancement board, the second strengthens having the same coefficient of thermal expansion between the board, the relative displacement that produces between each prism monomer that the thermal stress that can effectively avoid the temperature variation to produce arouses, guarantee the stability and the installation accuracy of structure.
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 an exploded view of a prism assembly provided in an embodiment of the present application.
Fig. 2 is a schematic connection diagram of a prism assembly provided in an embodiment of the present application.
Fig. 3 is a schematic diagram of a split prism in a prism assembly provided in an embodiment of the present application.
Fig. 4 is a schematic diagram of a prism assembly and a spatial light modulator in a projector according to an embodiment of the present disclosure.
Fig. 5 is an exploded view of a prism assembly and a spatial light modulator in a projector according to an embodiment of the present disclosure.
Fig. 6 is an exploded view of a prism assembly provided in another embodiment of the present application.
Fig. 7 is a schematic diagram of a prism assembly and a spatial light modulator according to another embodiment of the present disclosure.
Detailed Description
To facilitate an understanding of the embodiments of the present application, the embodiments of the present application will be described more fully below with reference to the accompanying drawings. Preferred embodiments of the present application are given in the accompanying drawings. This application may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the examples of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.
Referring to fig. 1, a prism assembly 100 provided in the present embodiment includes a split prism 10, a first reinforcing plate 21, a second reinforcing plate 22, a first cover plate 31 and a second cover plate 32.
The split prism 10 includes a plurality of prism single bodies 11, each prism single body 11 includes a first end surface 111, a second end surface 112 and a plurality of side surfaces 113 connecting the first end surface 111 and the second end surface 112, which are opposite to each other, and an air gap 40 is formed between the side surfaces 113 of two adjacent prism single bodies 11. The first reinforcing plate 21 is adhered to the first end surface 111 and covers each air gap 40, and the second reinforcing plate 22 is adhered to the second end surface 112 and covers each air gap 40 for further reinforcing the plurality of prism single bodies 11; the first reinforcing plate 21 and the second reinforcing plate 22 are made of the same material as the prism single bodies 11, so as to prevent the prism single bodies 11 from generating relative displacement when the temperature changes; the first cover plate 31 and the second cover plate 32 are respectively adhered to the first end surface 111 and the second end surface 112 and avoid the air gap 40, the first cover plate 31 and the first reinforcing plate 21 are spaced from each other and filled with soft glue 50 (see fig. 2 in detail), and the second cover plate 32 and the second reinforcing plate 22 are spaced from each other and filled with soft glue 50.
The first cover plate 31 and the second cover plate 32 are used for supporting and positioning the split prism 10, and the first cover plate 31 and the second cover plate 32 both avoid the air gap 40, because the air gap 40 is usually bonded by means of glue dispensing, the connection strength is relatively weak, and if the first cover plate 31 and the second cover plate 32 are directly bonded, due to the difference of the thermal expansion coefficients, thermal stress is easily generated when the temperature changes, so that the parallelism or the distance between the air gaps 40 changes, and the imaging quality is affected. Therefore, according to the present invention, the first reinforcing plate 21 and the second reinforcing plate 22, which are bonded to the air gap 40 and have the same material as the prism single bodies 11, are used for auxiliary reinforcement, so that the structural stability is improved, and the first reinforcing plate 21, the second reinforcing plate 22 and the prism single bodies 11 have the same thermal expansion coefficient, so that the relative displacement between the prism single bodies 11 caused by the thermal stress generated by the temperature change can be effectively avoided.
Meanwhile, the first cover plate 31 and the second cover plate 32 are respectively spaced from the first reinforcing plate 21 and the second reinforcing plate 22 and filled with soft rubber, so that clearance isolation is realized, namely, the first cover plate 31 and the first reinforcing plate 21 are not in direct contact, the first cover plate 31 and the first reinforcing plate 21 are isolated by soft rubber 50 (detailed in fig. 2), the second cover plate 32 and the second reinforcing plate 22 are not in direct contact, and the second cover plate 32 and the second reinforcing plate 22 are isolated by the soft rubber 50. Therefore, when the first cover plate 31 and the second cover plate 32 are slightly deformed due to stress or heat, the first reinforcing plate 21 and the second reinforcing plate 22 are not affected, so that the stable connection between the first reinforcing plate 21 and the second reinforcing plate 22 and the split prism 10 is prevented from being affected, and the structural stability of the prism assembly 100 is improved.
In addition, the split prism 10 has a partial region directly bonded to the first cover plate 31 and the second cover plate 32 without inserting an additional supporting member such as a reinforcing plate, so that introduction of an error can be reduced, and stable joining with high accuracy can be realized.
In some embodiments, the first end surface 111 and the second end surface 112 are parallel to each other, and if a virtual parallel surface parallel to the first end surface 111 and the second end surface 112 is established between the first end surface 111 and the second end surface 112, and the first reinforcing plate 21 and the second reinforcing plate 22 are disposed symmetrically with respect to the virtual parallel surface, or the first cover plate 31 and the second cover plate 32 are disposed symmetrically with respect to the virtual parallel surface, the stress applied to the split prism 10 can be more uniform, thereby further improving the structural stability of the prism assembly 100.
Referring to fig. 1 and fig. 2, in the present embodiment, the first cover plate 31 includes a first base 311 and a first boss 312 disposed on the first base 311, the first base 311 and the first end surface 111 are spaced from each other and filled with soft glue 50, and the first boss 312 and the first end surface 111 are adhered by hard glue 60. The second cover plate 32 includes a second base 321 and a second boss 322 disposed on the second base 321, the second base 321 and the second end face 112 are spaced from each other and filled with soft glue 50, and the second boss 322 and the second end face 112 are bonded by hard glue 60. The first boss 312 and the second boss 322 are bonded to the split prism 10, and the first base 311 and the first reinforcing plate 21, and the second base 312 and the second reinforcing plate 22 are arranged at an interval therebetween by using the height difference of the bosses, so that the structure design is simple and practical.
As an example, the hard glue 60 may have an elastic modulus of greater than or equal to 200MPa, and have a certain strength after curing, so as to ensure the connection strength between the first boss 312 and the second boss 322 and the split prism 10. The elastic modulus of the soft rubber 50 can be less than or equal to 10MPa, the soft rubber 50 has certain flexibility after being cured, gaps among the first base 311, the second base 321 and the split prism 10 are filled through the soft rubber 50, the structural stability is improved, and meanwhile, the gaps among the first base 311 and the first reinforcing plate 21 and between the second base 321 and the second reinforcing plate 22 can be ensured to be filled with the soft rubber 50, so that direct contact is avoided.
In this embodiment, the first base 311 is provided with a first mounting groove 313, and the first reinforcing plate 21 and the first mounting groove 313 are spaced from each other and filled with soft glue 50. The second base 321 is provided with a second mounting groove 323, and the second reinforcing plate 22 and the second mounting groove 323 are spaced from each other and filled with soft glue 50. Above-mentioned first base 311, second base 321 realize strengthening the interval setting of board 21 and second strengthening board 22 through first mounting groove 313 and second mounting groove 323 respectively, can make the structure compacter, and first mounting groove 313 and second mounting groove 323 can play certain limiting displacement to flexible glue 50 simultaneously, reduce the deformation volume of flexible glue 50.
In the present embodiment, each of the first reinforcing plate 21 and the second reinforcing plate 22 has a rectangular parallelepiped shape. Accordingly, the first and second mounting grooves 313 and 323 have a rectangular parallelepiped shape. The first reinforcing plate 21 and the second reinforcing plate 22 may cover the whole or a part of the single air gap 40, and may further reinforce the space between the plurality of prism elements 11. The first reinforcing plate 21 and the second reinforcing plate 22 provided by the embodiment of the application are simple and practical in structural design, and the processing and manufacturing cost can be effectively reduced.
In some embodiments, the first reinforcing plate 21 is fitted to the first mounting groove 313, and the interval between the first reinforcing plate 21 and the first mounting groove 313 may be set to 1 mm. The second reinforcing plate 22 is fitted into the second installation groove 323, and the interval between the second reinforcing plate 22 and the second installation groove 323 may be set to 1 mm. The elastic modulus of the soft rubber 50 can be less than or equal to 10MPa, and the cured soft rubber has certain flexibility, so that the influence of the first base 311 on the first reinforced plate 21 and the influence of the second base 321 on the second reinforced plate 22 can be effectively reduced. In the present embodiment, the first reinforcing plate 21 and the first end surface 111 are bonded by the hard glue 60, and the second reinforcing plate 22 and the second end surface 112 are bonded by the hard glue 60. As an example, the hard glue 60 may have an elastic modulus of 200MPa or more, a high rigidity, and a high strength, and may ensure the connection strength between the first reinforcing plate 21, the second reinforcing plate 22, and the split prism 10.
It should be noted that the thickness of the hard glue 60 is practically negligible, and the first reinforcing plate 21, the second reinforcing plate 22, the first boss 312 and the second boss 322 are bonded to the first end surface 111 without any gap.
Referring to fig. 1 and 3, in the present embodiment, the plurality of prism units 11 includes two first prism units 12, two second prism units 13, and two third prism units 14.
The side surfaces 113 of the two first prism single bodies 12 are bonded without a gap to form a light splitting surface 114, and the two first prism single bodies 12 are symmetrical about the light splitting surface 114. In some embodiments, the cross section of the first prism single body 12 is in a trapezoid shape, the first prism single body 12 has four side surfaces 113, the side surfaces 113 of the two first prism single bodies 12 can be glued without gaps by uniformly filling the adhesive, and the adhesive has a uniform thickness, so that the occurrence of position deviation caused by shrinkage of the adhesive can be avoided, and at the same time, the two first prism single bodies 12 can be firmly bonded.
The two second prism single bodies 13 are symmetrical about the light splitting plane 114, and an air gap 40 is formed between the side surfaces of the adjacent first prism single body 12 and the second prism single body 13 through glue dispensing. In some embodiments, the second prism single body 13 has a triangular cross section, and the second prism single body 13 has three side surfaces 113.
Two third prism single bodies 14 are symmetrical about the light splitting surface 114, and air gaps 40 are formed between the side surfaces of the adjacent second prism single bodies 13 and the third prism single bodies 14 through glue dispensing. In some embodiments, the third prism cell 14 has a triangular cross-section, and the third prism cell 14 has three sides 113.
The spectroscopic surface 114 is used in cooperation with an imaging device in a projector to generate a reflected image and a refracted image by dispersing an image generated by the imaging device, and a specific principle of light dispersion can be referred to in the conventional projector.
In the present embodiment, the number of the first reinforcing plates 21 is two, and the two first reinforcing plates 21 are symmetrical with respect to the splitting plane 114 (see fig. 4 in detail), and are respectively bonded to the first prism unit 12, the second prism unit 13, and the third prism unit 14 on both sides of the splitting plane 114. The number of the second reinforcing plates 22 is two, and the two second reinforcing plates 22 are symmetrical with respect to the splitting plane 114 and are respectively bonded to the first prism unit 12, the second prism unit 13, and the third prism unit 14 on both sides of the splitting plane 114. It is understood that the number of the first mounting grooves 313 is two, and two first mounting grooves 313 correspond to two first reinforcing plates 21; the number of the second installation grooves 323 is two, and the two second installation grooves 323 correspond to the two second reinforcing plates 22.
In some embodiments, the first bosses 312 are bonded to the first end surfaces 111 of the two first prism single bodies 12, and the second bosses 322 are bonded to the second end surfaces 112 of the two first prism single bodies 12, so that the air gaps 40 are avoided by both the first bosses 312 and the second bosses 322, that is, the air gaps 40 are not shielded by both the first bosses 312 and the second bosses 322, and it is avoided that the first bosses 312, the second bosses 322 and the prism single bodies 11 are made of different materials, and stress is easily generated during temperature change, thereby damaging the structural stability of the air gaps 40.
The prism assembly 100 provided by the embodiment of the application can effectively improve the structural stability of the split prism 10 through the first reinforcing plate 21, the second reinforcing plate 22, the first cover plate 31 and the second cover plate 32, and can ensure good installation accuracy when dealing with changes of stress and temperature.
The present embodiment also provides a projector (not shown in the drawings), which includes the prism assembly 100 in the above embodiment. Of course, although not shown in detail, the projector further includes a light source lamp, a control board, a power supply circuit, and the like, and the detailed configuration can be referred to some conventional projector apparatuses.
Since the projector includes the prism assembly 100 in the above embodiment, all the advantages of the prism assembly 100 are provided.
Referring to fig. 1 and 4, in the present embodiment, the projector further includes two spatial light modulators, namely, a first spatial light modulator 21 and a second spatial light modulator 22, and the first spatial light modulator 21 and the second spatial light modulator 22 are respectively mounted on two side surfaces 113 of the plurality of prism units 11. The first spatial light modulator 21 and the second spatial light modulator 22 are directly fixed to the prism assembly 100, so that a stable spatial position relationship can be maintained between the first spatial light modulator 21, the second spatial light modulator 22 and the prism assembly 100, and the phenomenon that a projected image is displaced due to position change is avoided.
Preferably, the spatial light modulator is a DMD component, but is not limited thereto, and the spatial light modulator may also be other light modulation devices such as an LCD (Liquid Crystal Display), an LC-SLM (Liquid Crystal spatial light modulator), an MEMS (Micro-Electro-Mechanical System), and the like.
In some embodiments, the first DMD assembly 21 includes a first connecting plate 211 and a first micromirror unit 212, the first micromirror unit 212 is disposed on the first connecting plate 211; the second DMD assembly 22 includes a second connecting board 221 and a second micromirror unit 222, and the second micromirror unit 222 is disposed on the second connecting board 221.
Wherein, first connecting plate 211 and second connecting plate 221 are installed respectively in the side of two third prism monomers 14, and first connecting plate 211 and second connecting plate 221 are in a light splitting surface 114 symmetry each other, because first connecting plate 211 and second connecting plate 221 symmetry set up for prism subassembly 100 can evenly receive the force, improves structural stability.
The DMD module is a semiconductor device including an extremely small mirror array, and modulates incident light to form an image by switching the reflection direction of the mirror array in accordance with an input signal.
Referring to fig. 4 and 5, taking the first DMD component 21 and three prism units on one side of the first DMD component 21 as an example, the projection light 300 enters from the outer side surface of the second prism unit 13, enters the first DMD component 21 on the side surface of the third prism unit 14 after being reflected, and is modulated, and the modulated projection light is output from the outer side surface of the first prism unit 12 and enters the lens.
Similarly, for the three prism units on the second DMD assembly 22 and the second DMD assembly 22, the projection light enters the second DMD assembly 22 on the side of the third prism unit 14 after entering from the outer side surface of the second prism unit 13 and being modulated, and the modulated projection light is output from the outer side surface of the first prism unit 12 and enters the lens.
Structural features of other parts between the first DMD assembly 21, the second DMD assembly 22 and the prism assembly 100 are within the understanding of those skilled in the art and will not be described herein again.
According to the projector provided by the embodiment of the application, the first DMD assembly 21 and the second DMD assembly 22 are directly fixed on the prism assembly 100, so that a stable relative position relationship between the DMD assembly and the prism assembly 100 can be ensured, and the displacement of a projected image caused by position change of the DMD assembly is avoided; meanwhile, the prism assembly 100 is assisted and reinforced at an air gap with relatively weak connection strength, and can effectively cope with the influence of temperature and stress change while bearing the side tension caused by installing the DMD assembly, thereby ensuring the stability and the installation precision of the structure.
In some other embodiments, the split prism 10 may also be configured to be applied to a structure of three DMD assemblies, and specifically, as shown in fig. 6, the plurality of prism units 11 includes a first prism unit 71, a second prism unit 72, and a third prism unit 73. The cross sections of the first prism single body 71 and the third prism single body 73 are both triangular, and the cross section of the second prism single body 72 is a trapezoid. A first air gap 81 is formed between the side surfaces of the first prism single body 71 and the third prism single body 73 by dispensing, a second air gap 82 is formed between the side surfaces of the second prism single body 72 and the third prism single body 73 by dispensing, and the first reinforcing plate 21 is adhered to the first end surfaces of the first prism single body 71, the second prism single body 72 and the third prism single body 73 and covers the first air gap 81 and the second air gap 82. The second reinforcing plate 22 is adhered to the second end surfaces of the first, second, and third prism units 71, 72, and 73, and covers the first and second air gaps 81 and 82.
The plurality of prism single bodies 11 further include a fourth prism single body 74 and a fifth prism single body 75, the cross section of the fourth prism single body 74 is triangular, the cross section of the fifth prism single body 75 is trapezoidal, the fourth prism single body 74 and the fifth prism single body 75 are disposed on the same side of the first prism single body 71, and the fourth prism single body 74 and the fifth prism single body 75 are stacked up and down.
Referring to fig. 7, in some other embodiments, the projector further includes a first DMD component 91, a second DMD component 92 and a third DMD component 93. The first DMD assembly 91 is mounted on the side surface of the first prism unit 71, the second DMD assembly 92 is mounted on the side surface of the second prism unit 72, and the third DMD assembly 93 is mounted on the side surface of the third prism unit 73.
In this embodiment, a bevel 76 is further disposed on one side of the fourth prism monomer 74 and the fifth prism monomer 75 facing the third DMD component 93, and the bevel 76 is adapted to the third DMD component 93 to avoid the third DMD component 93, thereby avoiding the influence on the installation of the third DMD component 93.
Referring to fig. 6 and 7, the optical path transmission process of the projector is as follows: the projection light 300 enters the first DMD assembly 91 through the bottom surface of the fourth prism unit 74, is reflected by the inclined surface of the fourth prism unit 74, enters the second DMD assembly 92 through the first prism unit 71 for modulation, enters the third DMD assembly 93 through the second prism unit 72 for modulation, and exits from the side surface of the fifth prism unit 75 after modulation, and the projection light 300 is emitted.
Structural features of other portions between the first DMD assembly 91, the second DMD assembly 92, the third DMD assembly 93 and the prism assembly 100 are within the understanding of those skilled in the art and will not be described herein again.
The projector provided by the above embodiment directly fixes the first DMD assembly 91, the second DMD assembly 92 and the third DMD assembly 93 to the prism assembly 100, so that a stable relative position relationship between the DMD assembly and the prism assembly 100 can be ensured, and the misalignment of a projected image caused by the position change of the DMD assembly is avoided; meanwhile, the prism assembly 100 is reinforced in an auxiliary manner at the first air gap 81 and the second air gap 82 with relatively weak connection strength through a reinforcing plate, so that the prism assembly can effectively cope with the influence of temperature and stress change while bearing the lateral tension caused by installing the DMD assembly, and the stability and the installation precision of the structure are ensured.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present application. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A prism assembly, comprising:
the split prism comprises a plurality of prism monomers, each prism monomer comprises a first end face, a second end face and a plurality of side faces, the first end face and the second end face are opposite, the side faces are connected with the first end face and the second end face, and an air gap is formed between the side faces of two adjacent prism monomers;
the first reinforcing plate is adhered to the first end face and covers each air gap, and the second reinforcing plate is adhered to the second end face and covers each air gap and is used for reinforcing the prism single bodies; the first reinforcing plate and the second reinforcing plate are made of the same material as the prism single bodies, so that relative displacement among the prism single bodies is avoided when the temperature changes; and
the first cover plate and the second cover plate are respectively bonded to the first end face and the second end face and avoid the air gap, the first cover plate and the first reinforcing plate are mutually spaced and filled with soft rubber to realize clearance isolation, and the second cover plate and the second reinforcing plate are mutually spaced and filled with soft rubber to realize clearance isolation.
2. The prism assembly according to claim 1, wherein the first cover plate comprises a first base and a first boss, the first base and the first end face are spaced from each other and filled with soft glue, the first boss is arranged on the first base and spaced from the first reinforcing plate, and the first boss and the first end face are bonded by hard glue;
the second cover plate comprises a second base and a second boss, the second base and the second end faces are spaced from each other and filled with soft glue, the second boss is arranged on the second base and spaced from the second reinforcing plate, and the second boss and the second end faces are bonded through hard glue.
3. The prism assembly according to claim 2, wherein the first base is provided with a first mounting groove, and the first reinforcing plate and the first mounting groove are spaced from each other and filled with soft glue;
the second base is provided with a second mounting groove, and the second reinforcing plate and the second mounting groove are mutually spaced and filled with soft glue.
4. The prism assembly of claim 1, wherein the first reinforcing sheet is bonded to the first end face by a hard glue, and the second reinforcing sheet is bonded to the second end face by a hard glue.
5. The prism assembly according to claim 2 or 4, wherein the hard glue has an elastic modulus of greater than or equal to 200 MPa; the elastic modulus of the soft glue is less than or equal to 10 MPa.
6. The prism assembly according to claim 1, wherein the plurality of prism monomers comprises two first prism monomers, two second prism monomers and two third prism monomers, wherein the side surfaces of the two first prism monomers are bonded without a gap to form a light splitting surface, and the two first prism monomers are symmetrical with respect to the light splitting surface; the two second prism single bodies are symmetrical about the light splitting plane, and the air gap is formed between the side surfaces of the adjacent first prism single bodies and the second prism single bodies through dispensing; the two third prism monomers are symmetrical about the light splitting surface, and the air gaps are formed between the adjacent second prism monomers and the side surfaces of the third prism monomers through glue dispensing.
7. The prism assembly according to claim 6, wherein the number of the first reinforcing plates is two, and the two first reinforcing plates are symmetrical with respect to the splitting plane and are respectively bonded to the first prism unit, the second prism unit and the third prism unit on both sides of the splitting plane;
the number of the second reinforcing plates is two, and the two second reinforcing plates are symmetrical about the light splitting surface and are respectively bonded to the first prism monomer, the second prism monomer and the third prism monomer on two sides of the light splitting surface.
8. The prism assembly according to claim 1, wherein the plurality of prism monomers comprise a first prism monomer, a second prism monomer and a third prism monomer, the third prism monomer forms the air gap with the side surfaces of the first prism monomer and the second prism monomer adjacent to each other through dispensing, the plurality of prism monomers further comprise a fourth prism monomer and a fifth prism monomer, the fourth prism monomer and the fifth prism monomer are arranged on the same side surface of the first prism monomer, and the fourth prism monomer and the fifth prism monomer are stacked up and down.
9. A projector comprising a prism assembly according to any one of claims 1 to 8.
10. The projector as claimed in claim 9, further comprising two or three spatial light modulators disposed at two or three sides of the plurality of prism cells, respectively.
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| CN202020591727.2U CN211826681U (en) | 2020-04-20 | 2020-04-20 | Prism assembly and projector |
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| CN202020591727.2U CN211826681U (en) | 2020-04-20 | 2020-04-20 | Prism assembly and projector |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113075842A (en) * | 2020-12-23 | 2021-07-06 | 深圳市安华光电技术有限公司 | Projection optical machine |
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2020
- 2020-04-20 CN CN202020591727.2U patent/CN211826681U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113075842A (en) * | 2020-12-23 | 2021-07-06 | 深圳市安华光电技术有限公司 | Projection optical machine |
| CN113075842B (en) * | 2020-12-23 | 2022-03-29 | 深圳市安华光电技术有限公司 | Projection optical machine |
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