CN113219769A - Optical machine module and projection equipment - Google Patents

Optical machine module and projection equipment Download PDF

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Publication number
CN113219769A
CN113219769A CN202110565790.8A CN202110565790A CN113219769A CN 113219769 A CN113219769 A CN 113219769A CN 202110565790 A CN202110565790 A CN 202110565790A CN 113219769 A CN113219769 A CN 113219769A
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Prior art keywords
assembly
light
light beam
protective glass
optical
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CN202110565790.8A
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Chinese (zh)
Inventor
王宇
梁凯华
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Qingdao Hisense Laser Display Co Ltd
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Qingdao Hisense Laser Display Co Ltd
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Priority to CN202110565790.8A priority Critical patent/CN113219769A/en
Publication of CN113219769A publication Critical patent/CN113219769A/en
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    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/005—Projectors using an electronic spatial light modulator but not peculiar thereto
    • G03B21/008—Projectors using an electronic spatial light modulator but not peculiar thereto using micromirror devices
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/142—Adjusting of projection optics
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/20—Lamp housings
    • G03B21/208—Homogenising, shaping of the illumination light
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/12—Picture reproducers
    • H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
    • H04N9/3102—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM] using two-dimensional electronic spatial light modulators
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/12—Picture reproducers
    • H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
    • H04N9/3141—Constructional details thereof
    • H04N9/315—Modulator illumination systems
    • H04N9/3152—Modulator illumination systems for shaping the light beam

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Optics & Photonics (AREA)
  • Projection Apparatus (AREA)

Abstract

The application discloses ray apparatus module and projection equipment belongs to projection technical field. The optical-mechanical module comprises an optical valve component, a prism component and a lens component which are arranged along a light path in sequence; the light valve assembly includes: the light valve is used for guiding a received light beam to the protective glass after processing, the protective glass is used for guiding the received light beam to the prism assembly, the prism assembly is used for guiding the light beam provided by the protective glass to the lens assembly, and the lens assembly is used for projecting an image picture based on the projection; the driving part is used for driving the protection glass to vibrate, so that the vibrating mirror can be omitted, the structure of the optical-mechanical module is simple, the problems that the optical-mechanical module is complex in structure, multiple in assemblies and large in size of projection equipment in the related technology can be solved, and the effects of simplifying the structure of the optical-mechanical module and reducing the size of the optical-mechanical module are achieved.

Description

Optical machine module and projection equipment
Technical Field
The application relates to the technical field of projection, in particular to an optical machine module and projection equipment.
Background
The laser projection technology is a new projection display technology, and the main advantages of the laser light source include high brightness, bright color and low energy consumption, so that the laser projection technology has the characteristics of high picture contrast and clear imaging, and therefore, the laser projection technology becomes the mainstream development direction in the market. With the development of projection display technology and markets, in order to enable laser display projection technology to be applied to more scenes, a miniaturized projection apparatus is required. The structure of the optical-mechanical module in the projection equipment has a large influence on the volume of the projection equipment.
An optical-mechanical module is used for projection equipment and comprises a Digital Micromirror Device (DMD), DMD protective glass, a prism assembly, a vibrating mirror assembly and a lens assembly, wherein light beams emitted by the DMD assembly penetrate through the DMD protective glass to reach the prism assembly, the prism assembly receives the light beams and emits the light beams to the vibrating mirror assembly, and the vibrating mirror assembly enables the light beams to deviate and then emits the light beams to the lens assembly. When the optical-mechanical module is used, the information carried on the outgoing light beam of the DMD can generate pixel deviation at the galvanometer component and is superposed at the lens component, so that higher resolution is achieved.
However, the optical mechanical module has a complex structure, many components and a large volume.
Disclosure of Invention
The embodiment of the application provides an optical machine module and projection equipment, technical scheme is as follows:
according to a first aspect of the present application, there is provided an opto-mechanical module comprising an opto-valve assembly, a prism assembly and a lens assembly arranged in sequence along an optical path;
the light valve assembly includes: light valve, driver part and being located the protective glass of light valve light-emitting side, protective glass install in on the driver part, the light valve is used for handling the back direction with received light beam protective glass, protective glass is used for leading received light beam prism subassembly, prism subassembly be used for with the light beam direction that protective glass provided the camera lens subassembly, the camera lens subassembly is used for projecting out the image picture based on received light beam, driver part is used for the drive protective glass vibrates.
Optionally, a distance between the prism assembly and the lens assembly ranges from 4 mm to 12 mm.
Optionally, the driving member is configured to drive the cover glass to vibrate in a cyclic reciprocating manner about at least two axes, which are not parallel to each other.
Optionally, the optical mechanical module further includes a light homogenizing assembly and a light path assembly, the light homogenizing assembly is used for receiving the light beam and guiding the processed light beam to the light path assembly, the light path assembly is used for guiding the received light beam to the prism assembly, and the prism assembly is further used for guiding the received light beam from the light path assembly to the light valve.
In another aspect, a light valve assembly is provided, the light valve assembly comprising: the light valve is used for processing a received light beam and guiding the processed light beam to the protective glass, and the protective glass is used for outputting the received light beam;
the driving component is used for driving the protective glass to vibrate.
Optionally, when the protective glass is stationary, the distance between the protective glass and the light valve ranges from 0.3 mm to 1 mm.
Optionally, the thickness of the cover glass ranges from 1 to 2 millimeters.
Optionally, the protective glass has a refractive index in the range of 1.49 to 1.65.
Optionally, the driving part is used for driving the protective glass to vibrate at a frequency greater than or equal to 30 hertz.
In another aspect, a projection apparatus is provided, which includes any of the optical mechanical modules described above.
The beneficial effects brought by the technical scheme provided by the embodiment of the application at least comprise:
an opto-mechanical module is provided that includes a light valve assembly, a prism assembly, and a lens assembly, wherein the light valve assembly includes a light valve, a driving member, and a protective glass positioned on a light exit side of the light valve. This drive assembly can drive protecting glass and carry out high-frequency vibration, the emergent light that can make the light valve is along different light path directive lens subassembly respectively at different moments, and by lens subassembly directive projection curtain, different light beam constantly can superpose on the projection curtain, so alright with need not to set up the mirror that shakes again, the structure of ray apparatus module is comparatively simple, can solve among the correlation technique ray apparatus module structure complicacy, the subassembly is more, the problem that the volume is probably great, the effect of simplifying ray apparatus module structure and reducing the volume of ray apparatus module has been reached.
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 illustration of an implementation environment provided by an embodiment of the present application;
FIG. 2 is a schematic diagram of an opto-mechanical module according to the related art;
fig. 3 is a schematic structural diagram of an optical-mechanical module according to an embodiment of the present disclosure;
FIG. 4 is a schematic view of a deflection of a cover glass according to an embodiment of the present disclosure;
fig. 5 is a schematic view of a picture projected by the optical-mechanical module according to an embodiment of the present disclosure;
fig. 6 is a schematic structural diagram of another optical-mechanical module according to an embodiment of the present disclosure;
fig. 7 is a schematic view of another image projected by the optical-mechanical module according to an embodiment of the present disclosure;
FIG. 8 is a schematic structural diagram of an optical valve assembly provided in an embodiment of the present application;
fig. 9 is a schematic structural diagram of a projection apparatus according to an embodiment of the present application.
With the above figures, there are shown specific embodiments of the present application, which will be described in more detail below. These drawings and written description are not intended to limit the scope of the inventive concepts in any manner, but rather to illustrate the inventive concepts to those skilled in the art by reference to specific embodiments.
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 diagram of an implementation environment according to an embodiment of the present disclosure, which may include a projection device 10 and a projection curtain 20.
The projection apparatus 10 may include an optical module 11 and a light source device 12. The light source device 12 is used for providing a light source to the optical module 11, and the optical module 11 is used for projecting a predetermined pattern onto the projection curtain 20 according to the light source provided by the light source device 12.
The projection curtain 20 is used for carrying the pattern projected by the optical module 11. The projection screen 20 may be made of various materials, such as Polyvinyl chloride (PVC), metal, glass fiber, glass beads, etc., and the present embodiment is not limited thereto.
Fig. 2 is a schematic structural diagram of an optical-mechanical module in the related art. The optical mechanical module 30 includes a Digital Micromirror Device (DMD)31, a DMD protective glass 32, a prism assembly 33, a galvanometer assembly 34 and a lens assembly 35 sequentially arranged along a light path direction, wherein the lens assembly 35 includes a lens 351 and a lens 352, and when a light beam is emitted from the DMD 31, the light beam passes through the DMD protective glass 32 to the prism assembly 33, the prism assembly 33 receives the light beam and emits the light beam to the galvanometer assembly 34, the galvanometer assembly 34 deflects the light beam, and then emits the light beam to the lens 351, and the light beam is emitted through the lens 351 and then enters the lens 352. When the optical-mechanical module operates, the galvanometer component 34 can vibrate, so that light beams emitted by the digital micromirror device 31 can respectively irradiate to the lens component 35 from different light paths at different moments after reaching the galvanometer component 34, and irradiate to the projection screen by the lens component 35, and the light beams at different moments can be superposed on the projection screen to improve the resolution of images displayed on the projection screen.
In one technical scheme, a galvanometer component is arranged in an optical mechanical module, the galvanometer component can be arranged between a prism component and a lens component, when a light beam is emitted from a digital micro-mirror device and then penetrates through protective glass to the prism component, the prism component receives the light beam and emits the light beam to the galvanometer component, the galvanometer component comprises a galvanometer structural part and a galvanometer, the galvanometer structural part provides power for the galvanometer so that the galvanometer can deflect to enable the light beam to deviate, then the light beam is respectively emitted to the lens component along different light paths at different moments through the lens component so as to improve the resolution of projection equipment formed by the optical mechanical module, a structure formed by the galvanometer structural part and the galvanometer has a certain volume, when the structure is arranged between the lens component and the prism component, in order to avoid the structure from influencing the prism component and the lens component, a certain distance needs to be reserved between the structure and the lens component as well as the prism component, as shown in fig. 2, the distance between the prism assembly 33 and the galvanometer assembly 34 may be 4 mm, the distance between the galvanometer assembly 34 and the lens assembly 35 may be 3 mm, the thickness of the galvanometer optical glass may be about 2 mm, and the distance a between the prism assembly 33 and the lens assembly 35 ranges from 9 mm to 17 mm, which makes the distance between the prism assembly 33 and the lens assembly 35 larger, and further causes the volume of the optical module to be larger.
In another technical scheme, a vibrating mirror assembly in the optical-mechanical module can be placed between the prism assembly and the digital micro-mirror device, the vibrating mirror assembly comprises a vibrating mirror structural part and a vibrating mirror, the vibrating mirror structural part provides power for the vibrating mirror, and the vibrating mirror deflects to enable a light beam to deviate, so that the resolution of projection equipment formed by the optical-mechanical module is improved. The structure that the mirror structure and the mirror that shakes constitute has certain volume, and when setting up this structure between digital micro mirror device and prism subassembly, in order to avoid this structure and prism subassembly and digital micro mirror device to influence each other, all need reserve certain distance between this structure and digital micro mirror device and the prism subassembly, this distance that just makes between digital micro mirror device and the prism subassembly is great, and then leads to the volume of ray apparatus module great.
Above-mentioned ray apparatus module has set up the mirror subassembly that shakes, can make ray apparatus module structure complicated under the normal conditions, and projection equipment's the great thickness of volume is thicker. In addition, in the projection apparatus, the difficulty of designing the optical path and the lens is also high.
The embodiment of the application provides an optical machine module and projection equipment, and can solve some problems in the related art.
Fig. 3 is a schematic structural diagram of an optical-mechanical module according to an embodiment of the present disclosure. The structure of the optical-mechanical module is as follows:
the optical-mechanical module 11 includes an optical valve assembly 111, a prism assembly 112 and a lens assembly 113 sequentially disposed along an optical path.
The light valve assembly 111 includes: the light valve 1111 is used for processing the received light beam and guiding the processed light beam to the protective glass 1113, the protective glass 1113 is used for guiding the received light beam to the prism assembly 112, the prism assembly 112 is used for guiding the light beam provided by the protective glass 1113 to the lens assembly 113, the lens assembly 113 is used for projecting an image picture based on the received light beam, and the driving component 1112 is used for driving the protective glass 1113 to vibrate so as to increase the resolution of the image picture projected by the lens assembly 113. The protective glass 1113 may be a piece of transparent glass, and may vibrate at a high frequency under the driving of the driving component 1112 to realize the staggered projection of the light beam.
In the optical module of the present application, the protection glass 1113 and the driving component 1112 are utilized to make the resolution of the emergent beam of the optical module higher than that of the light valve 1111, for example, the resolution can be raised to 4K from 1080P in the related art. As shown in fig. 4, when the driving means drives the protective glass 1113 to vibrate at high frequency, the protective glass 1113 is in the first state (a), and when the protective glass 1113 is displaced at a certain angle from the first state, that is, in the second state (b). As shown in fig. 4(a), when the protective glass 1113 is in the first state (a), the main light beam emitted from the light valve 1111 can be guided through the protective glass 1113 and emitted perpendicularly to the protective glass 1113 without deviation. To achieve the effect of pixel shift, as shown in fig. 4(b), when the cover glass is in the second state (b), the driving component 1112 drives the cover glass 1113 to vibrate and form a deflection angle θ angle, and the principal ray passes through the cover glass to generate a shift Δ y, knowing that the refractive index of the cover glass is n and the thickness is t, according to the law of refraction:
sinθ＝n sinθ1；
and trigonometric functions:
Figure BDA0003080930800000051
it can be deduced that:
Figure BDA0003080930800000052
using the trigonometric function formula:
sin(θ-θ1)＝sinθcosθ1-cosθsinθ1；
sin2θ+cos2θ＝1；
and the law of refraction can be derived:
Figure BDA0003080930800000061
the cover glass 1113 is driven to undergo deflection vibration by the driving unit 1112 to effect pixel displacement, so that the resolution of an image presented on the projection screen can be improved. The offset of the protective glass 1113 driven by the driving component 1112 to vibrate to the light beam is 1/2 pixel pitches, the driving component 1112 can drive the protective glass 1113 to vibrate in a high frequency in a reciprocating manner along an axis, when the protective glass vibrates in the high frequency along an axis, the light beam irradiates the light valve receiving surface through the protective glass, and the position of the light beam is staggered or not completely overlapped, so that the light beam penetrating through the protective glass 1113 can form pixel offset, as shown in fig. 5, which is a schematic diagram of a picture projected by the optical mechanical module provided in the embodiment of the present application. P1 is the initial pixel position, and P2 is the position of the initial pixel after vibration offset along the axis forming an angle of 45 ° with the horizontal direction, so that the resolution of the image frame projected by the lens assembly 113 can be increased.
In summary, the embodiment of the present application provides an optical mechanical module including a light valve assembly, a prism assembly and a lens assembly, wherein the light valve assembly includes a light valve, a driving part and a protection glass located on a light emitting side of the light valve. This drive assembly can drive protective glass and carry out high-frequency oscillation, the light beam sees through protective glass and shines to the position dislocation of light valve accepting surface or incompletely overlap, can make the emergent light of light valve follow different light paths directive lens subassembly respectively at different moments, and by lens subassembly directive projection curtain, the light beam at different moments can superpose on the projection curtain, with the resolution ratio of the image picture that increase lens subassembly throws out, so alright need not to set up the mirror that shakes again, the structure of ray apparatus module is comparatively simple, can solve ray apparatus module structure complicacy among the correlation technique, the subassembly is more, the problem that the volume is probably great, the effect of simplifying ray apparatus module structure and reducing the volume of ray apparatus module has been reached.
Optionally, the spacing between the prism assembly and the lens assembly ranges from 4 mm to 12 mm.
Optionally, the driving member is configured to drive the cover glass to vibrate in a cyclic reciprocating manner about at least two axes, which are not parallel to each other.
Optionally, the optical mechanical module further includes a light homogenizing assembly and a light path assembly, the light homogenizing assembly is configured to receive the light beam and guide the processed light beam to the light path assembly, the light path assembly is configured to guide the received light beam to the prism assembly, and the prism assembly is further configured to guide the light beam received from the light path assembly to the light valve.
In another aspect, a light valve assembly is provided, comprising: the light valve is used for processing the received light beam and guiding the processed light beam to the protective glass, and the protective glass is used for outputting the received light beam;
the driving component is used for driving the protective glass to vibrate so as to increase the resolution of an image picture projected by the lens component.
Optionally, when the protective glass is at rest, the distance between the protective glass and the light valve ranges from 0.3 mm to 1 mm.
Optionally, the thickness of the cover glass ranges from 1 to 2 mm.
Optionally, the protective glass has a refractive index in the range of 1.49 to 1.65.
Optionally, the driving part is used for driving the protective glass to vibrate at a frequency greater than or equal to 30 hertz.
Fig. 6 is a schematic structural diagram of another optical-mechanical module according to an embodiment of the present disclosure. The structure of the optical-mechanical module is as follows:
the optical mechanical module further includes a light homogenizing assembly 114 and an optical path assembly 115, the light homogenizing assembly 114 is configured to receive a light beam from the light source, optimize the spot shape of the light beam, homogenize the light beam, and process the light beam to the optical path assembly 115, the optical path assembly 115 includes a first lens 1151, a mirror 1152, and a second lens 1153, the first lens 1151 receives the light beam from the light homogenizing assembly 114 and transmits the light beam to the mirror 1152, the mirror 1152 is configured to reflect the light beam transmitted through the first lens 1151 to the second lens 1153, the second lens 1153 is configured to direct the light beam reflected by the mirror 1152 to the prism assembly 112, the prism assembly 112 is further configured to direct the light beam received from the optical path assembly 115 to the light valve 1111, and then the light valve 1111 is configured to direct the received light beam (processed into an image beam) to the protective glass 1113, and the protective glass 1113 is configured to direct the received light beam to the prism assembly 112, the prism assembly 112 is used for guiding the light beam provided by the protective glass 1113 to the lens assembly 113, and the lens assembly 113 is used for projecting an image picture based on the received light beam.
Alternatively, the projection device may include a projection device of a laser light source and a projection device of an LED light source. The projection equipment of LED light source can reach the volume miniaturization, but the projection equipment's of LED light source resolution ratio is mostly 720P, and laser source's projection equipment can improve resolution ratio and display brightness, thereby make projection equipment's picture contrast better, it is more clear to form images, bright in color, luminance is higher, even light subassembly can be used for carrying out the homogenization with the light of the gaussian distribution that the light source provided, the shape that matches digital micro mirror device is put into shape to beam shaping simultaneously, consequently in the ray apparatus module, set up even light subassembly 114 and receive laser beam, before making laser beam get into light path subassembly 115 after through even light subassembly 114, can carry out light beam homogenization and facula optimization earlier.
Optionally, the light homogenizing assembly may be a light guide tube or a fly-eye lens, and may be used to shape and homogenize the laser spot incident from the light source. Beam homogenization refers to the shaping of a beam with uneven intensity distribution into a beam with uniform cross-section distribution through beam transformation. Laser speckle refers to the fact that when a laser light source is used to illuminate a rough surface such as a screen or any other object that produces diffuse reflection or diffuse transmission of light, the light beams form bright or dark spots, creating a random granular intensity pattern.
The light guide pipe is a tubular device formed by splicing four plane reflection sheets, namely a hollow light guide pipe, light rays are reflected for multiple times in the light guide pipe to achieve the effect of light uniformization, the light guide pipe can also adopt a solid light guide pipe, the light inlet and the light outlet of the light guide pipe are rectangles with uniform shapes and areas, light beams enter from the light inlet of the light guide pipe and then are emitted from the light outlet of the light guide pipe, and light beam homogenization and laser spot optimization are completed in the process of passing through the light guide pipe. Fly-eye lenses are generally formed by combining a series of small lenses, two arrays of fly-eye lenses are arranged in parallel to divide the light spot of an input laser beam, and the divided light spots are accumulated by a subsequent focusing lens, so that the light beam is homogenized and the light spot is optimized.
Optionally, the distance b between the prism assembly 112 and the lens assembly 113 ranges from 4 millimeters to 12 millimeters. When a galvanometer component exists between the prism component and the lens component, the distance a between the prism component and the lens component ranges from 9 millimeters to 17 millimeters, wherein the distance between the prism component and the galvanometer component can be 4 millimeters, the distance between the galvanometer component and the lens component head can be 3 millimeters, and the thickness of the galvanometer optical glass can be about 2 millimeters. In the ray apparatus module that this application embodiment provided, replace the mirror assembly that shakes through cover glass, the mirror thickness that shakes and the distance between mirror assembly to the camera lens subassembly and the mirror that shakes to the prism subassembly have been subtracted in other words, the distance between prism subassembly to the camera lens subassembly has reduced 5 millimeters at least, the scope becomes 4 millimeters ~ 12 millimeters, the distance of prism subassembly to camera lens subassembly has been shortened effectively, and the structure of ray apparatus module has been simplified, be favorable to miniaturized projection equipment.
Alternatively, in another technical solution provided in the embodiment of the present application, the driving part 1112 is configured to drive the cover glass 1113 to vibrate in a cyclic reciprocating manner around at least two axes, and the two axes are not parallel to each other. The two vibration axes are not parallel to each other, so that the pixels can be deviated in two different directions and are crossed with each other, and the resolution of the picture projected on the projection curtain can be further improved. Optionally, the two vibration axes are perpendicular to each other.
The amount of shift of the cover glass 1113 to the light beam is 1/2 pixel pitches, and when the driving unit 1112 drives the cover glass 1113 to make a cyclic reciprocating vibration along an axis, there is a shift of 1/2 pixel pitches to the light beam perpendicular to the axis, and when the driving unit 1112 drives the cover glass 1113 to make a cyclic reciprocating vibration along the axis of the high-frequency vibration, there are more pixel shifts to the light beam. When the driving unit 1112 drives the cover glass 1113 to vibrate in a high frequency circularly along two axes, and the two axes are perpendicular to each other, the pixels on the light beam will shift to the right and downward in two positions, as shown in fig. 7, which is a schematic view of another image projected by the optical engine module according to the embodiment of the present application. P1 is the initial pixel position, and P2 is the position of the initial pixel after vibration deflection along the horizontal axis and the axis perpendicular to the horizontal axis, so as to improve the resolution of the picture by 4 times of the original resolution, greatly improve the resolution of the picture, and improve the display effect.
In summary, the embodiment of the present application provides an optical mechanical module including a light valve assembly, a prism assembly and a lens assembly, wherein the light valve assembly includes a light valve, a driving part and a protection glass located on a light emitting side of the light valve. This drive assembly can drive protective glass and carry out high-frequency oscillation, the light beam sees through protective glass and shines to the position dislocation of light valve accepting surface or incompletely overlap, can make the emergent light of light valve follow different light paths directive lens subassembly respectively at different moments, and by lens subassembly directive projection curtain, the light beam at different moments can superpose on the projection curtain, with the resolution ratio of the image picture that increase lens subassembly throws out, so alright need not to set up the mirror that shakes again, the structure of ray apparatus module is comparatively simple, can solve ray apparatus module structure complicacy among the correlation technique, the subassembly is more, the problem that the volume is probably great, the effect of simplifying ray apparatus module structure and reducing the volume of ray apparatus module has been reached.
Fig. 8 is a schematic structural diagram of a light valve assembly according to an embodiment of the present disclosure. The light valve assembly 111 includes: the light valve 1111 is used for processing the received light beam and guiding the processed light beam to the protective glass 1113, the protective glass 1113 is used for guiding the received light beam to the prism assembly 112, the prism assembly 112 is used for guiding the light beam provided by the protective glass 1113 to the lens assembly 113, and the lens assembly 113 is used for projecting an image picture based on the received light beam.
The driving component 1112 is configured to drive the cover glass 1113 to vibrate so as to increase the resolution of the image frames projected by the lens assembly 113.
Optionally, the distance between the protective glass 1113 and the light valve 1111 when the protective glass is at rest is in the range of 0.3 mm to 1 mm.
The distance between the protective glass 1113 and the light valve 1111 is very small, and the distance value can be selected within the distance range between the protective glass 1113 and the light valve 1111 after the vibration amplitude and the frequency of the protective glass are determined, so that the distance between the components of the optical mechanical module can be shortened, the size of the optical valve component can be reduced, and the size of the optical mechanical module formed by the optical valve component can be further reduced.
Optionally, the protective glass 1113 has a thickness in the range of 1 to 2 millimeters. The cover glass is a piece of transparent glass, the mirror that shakes compared with among the prior art can be more frivolous, replace the mirror subassembly that shakes among the correlation technique with cover glass 1113 and driver part 1112 in this embodiment, then in the optical mechanical module that constitutes by this optical mechanical module, just can need not to set up the mirror subassembly that shakes again, for example can need not to set up the mirror subassembly that shakes again between prism subassembly and lens subassembly, perhaps, can need not to set up the mirror subassembly that shakes again between prism subassembly and optical mechanical module, so alright reduce the size in the shared space of optical mechanical module.
Alternatively, the protective glass 1113 has a refractive index in the range of 1.49 to 1.65.
Optionally, the driving part 1112 is for driving the cover glass 1113 to vibrate at a frequency of greater than or equal to 30 hz.
The protective glass is shifted by half a pixel with respect to the light beam, and for example, the light beam is shifted by 2.7 μm in 0.47DMD (DMD having a size of 0.47 inch). Since the size of 0.47DMD is much larger than the amount of deviation of the light beam after the driving part 1112 drives the cover glass 1113 to vibrate, the deviation of the light beam does not affect the adjustment of the dark band. In the embodiment of the present application, the vibration frequency of the protective glass 1113 is 30Hz, which may be 60Hz, higher than the frequency at which human eyes can start to perceive an image.
In summary, the embodiment of the present application provides an optical mechanical module including a light valve assembly, a prism assembly and a lens assembly, wherein the light valve assembly includes a light valve, a driving part and a protection glass located on a light emitting side of the light valve. This drive assembly can drive protective glass and carry out high-frequency oscillation, the light beam sees through protective glass and shines to the position dislocation of light valve accepting surface or incompletely overlap, can make the emergent light of light valve follow different light paths directive lens subassembly respectively at different moments, and by lens subassembly directive projection curtain, the light beam at different moments can superpose on the projection curtain, with the resolution ratio of the image picture that increase lens subassembly throws out, so alright need not to set up the mirror that shakes again, the structure of ray apparatus module is comparatively simple, can solve ray apparatus module structure complicacy among the correlation technique, the subassembly is more, the problem that the volume is probably great, simplified ray apparatus module structure has been reached, the effect of the volume of reducing ray apparatus module.
Fig. 9 is a schematic structural diagram of a projection apparatus according to an embodiment of the present application. The projection apparatus 10 includes a light source device 12 and the optical-mechanical module 11 in any of the above embodiments.
The light source device 12 may include at least one laser and a light beam control component for providing light beams of various colors to the optical mechanical module 11.
The dodging component 114 is used for receiving light beams from a light source, optimizing the light spot shape and homogenizing the light beams of the light spots of the incident light beams, processing the light beams and guiding the processed light beams to the light path component 115, the light path component 115 is used for guiding the received light beams to the prism component 112, the prism component 112 is also used for guiding the light beams received from the light path component 115 to the light valve 1111, then the light valve 1111 is used for processing the received light beams and guiding the processed light beams to the protective glass 1113, the protective glass 1113 is used for guiding the received light beams to the prism component 112, the prism component 112 is used for guiding the light beams provided by the protective glass 1113 to the lens component 113, and the lens component 113 is used for projecting image pictures based on the received light beams. The protective glass 1113 is mounted on the driving component 1112, and is very close to the light valve 1111 and the prism assembly 112, so that the back focal length of the lens assembly is not increased, and the design difficulty is low.
In addition, the projection apparatus 10 in the embodiment of the present application includes the protective glass 1113 that can vibrate under the driving of the driving component 1112, and the protective glass can improve the resolution of the picture projected by the projection lens, for example, if the resolution of the light valve is 1080p, the resolution of the picture projected by the projection lens can reach 4K through the protective glass 1113 that vibrates under the driving of the driving component 1112. And light valve and projection lens are close to the prism subassembly, have reduced the whole length of ray apparatus module along the optical axis direction, and back working distance reduces simultaneously and can make projection lens's size reduce relatively, and the camera lens design degree of difficulty descends, and the camera lens reduces the lens complexity to obtain projection equipment 10 that the volume is littleer.
Therefore, the projection device 10 including the optical engine module 11 provided in the embodiment of the present application can reduce the distance in both the F1 direction and the F2 direction of the projection device, thereby reducing the volume of the projection device, and achieving a higher resolution.
To sum up, the embodiment of the present application provides a projection equipment including light source device and optical mechanical module, and this optical mechanical module includes the optical mechanical module of light valve subassembly, prism subassembly and lens subassembly, and wherein the light valve subassembly includes light valve, driver part and is located the protection glass of light valve light-emitting side. This drive assembly can drive protective glass and carry out high-frequency oscillation, the light beam sees through protective glass and shines to the position dislocation of light valve accepting surface or incompletely overlap, can make the emergent light of light valve follow different light paths directive lens subassembly respectively at different moments, and by lens subassembly directive projection curtain, the light beam at different moments can superpose on the projection curtain, with the resolution ratio of the image picture that increase lens subassembly throws out, so alright need not to set up the mirror that shakes again, the structure of ray apparatus module is comparatively simple, can solve among the correlation technique ray apparatus module structure complicacy, the subassembly is more, and then lead to the great problem of projection equipment volume, simplified ray apparatus module structure has been reached, and then the effect that reduces projection equipment volume.
After the size of the projection equipment is reduced, the projection equipment can be applied to more scenes, the application field of the projection equipment is expanded, and the user experience is better.
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.
It should be noted that the terms "first" and "second" are used herein for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Claims (10)

1. An optical-mechanical module is characterized by comprising an optical valve component, a prism component and a lens component which are sequentially arranged along a light path;
the light valve assembly includes: light valve, driver part and being located the protective glass of light valve light-emitting side, protective glass install in on the driver part, the light valve is used for handling the back direction with received light beam protective glass, protective glass is used for leading received light beam prism subassembly, prism subassembly be used for with the light beam direction that protective glass provided the camera lens subassembly, the camera lens subassembly is used for projecting out the image picture based on received light beam, driver part is used for the drive protective glass vibrates.
2. The opto-mechanical module of claim 1, wherein a spacing between the prism assembly and the lens assembly ranges from 4 mm to 12 mm.
3. The opto-mechanical module of claim 1, wherein the drive member is configured to drive the cover glass to oscillate in a cyclic and reciprocating manner about at least two axes, the two axes being non-parallel to each other.
4. The opto-mechanical module of any of claims 1-3 further comprising a dodging assembly for receiving and processing the light beam and directing the processed light beam to the optical path assembly, and an optical path assembly for directing the received light beam to the prism assembly, the prism assembly further being configured to direct the light beam received from the optical path assembly to the light valve.
5. A light valve assembly, comprising: the light valve is used for processing a received light beam and guiding the processed light beam to the protective glass, the protective glass is used for outputting the received light beam, and the driving part is used for driving the protective glass to vibrate.
6. The light valve assembly of claim 5, wherein the cover glass is at rest at a distance ranging from 0.3 mm to 1 mm from the light valve.
7. The light valve assembly of claim 5, wherein the protective glass has a thickness in a range of 1 to 2 millimeters.
8. The light valve assembly of claim 5, wherein the protective glass has a refractive index in the range of 1.49 to 1.65.
9. The light valve assembly as recited in claim 5, wherein the drive member is configured to drive the cover glass to vibrate at a frequency greater than or equal to 30 hertz.
10. A projection apparatus, comprising the opto-mechanical module of any of claims 1-4.
CN202110565790.8A 2021-05-24 2021-05-24 Optical machine module and projection equipment Pending CN113219769A (en)

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CN110082999A (en) * 2018-01-26 2019-08-02 中强光电股份有限公司 Projector, light engine and picture element offset assembly
CN209765249U (en) * 2019-05-24 2019-12-10 中强光电股份有限公司 Projection device
CN110632741A (en) * 2019-09-23 2019-12-31 深圳市点睛创视技术有限公司 Projection lens
CN113225544A (en) * 2021-05-17 2021-08-06 青岛海信激光显示股份有限公司 Illumination system and projection apparatus

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Publication number Priority date Publication date Assignee Title
US5969757A (en) * 1995-07-05 1999-10-19 Sharp Kabushiki Kaisha Imaging apparatus and method having enhanced moire reduction
CN1906930A (en) * 2004-05-27 2007-01-31 Lg电子株式会社 Display device
US20090195752A1 (en) * 2008-02-04 2009-08-06 Coretronic Corporation Projector and digital micor-mirror device module
CN201725079U (en) * 2010-04-30 2011-01-26 一品光学工业股份有限公司 Projecting lens system and projecting device thereof
CN110082999A (en) * 2018-01-26 2019-08-02 中强光电股份有限公司 Projector, light engine and picture element offset assembly
CN209765249U (en) * 2019-05-24 2019-12-10 中强光电股份有限公司 Projection device
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Application publication date: 20210806