CN208351228U - Projection device and imaging module thereof - Google Patents
Projection device and imaging module thereof Download PDFInfo
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- CN208351228U CN208351228U CN201821018848.7U CN201821018848U CN208351228U CN 208351228 U CN208351228 U CN 208351228U CN 201821018848 U CN201821018848 U CN 201821018848U CN 208351228 U CN208351228 U CN 208351228U
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- optical element
- actuator
- image
- bearing seat
- active display
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Abstract
A projection device and an imaging module thereof, the imaging module comprises: display element and image displacement device. The display element comprises an active display surface, and the active display surface is used for receiving the illumination light beams, converting the illumination light beams into image light beams and transmitting the image light beams. The image displacement device comprises an optical element, a bearing seat, a base and at least one actuator. The optical element is arranged on the bearing seat. The optical element is located on the transmission path of the image light beam and is used for allowing the image light beam to pass through. At least one actuator is disposed on the base. One end of the actuator is connected with the bearing seat so as to drive the optical element on the bearing seat to swing relative to the base. The plane where the active display surface is located is a reference plane. The orthographic projection area of at least one actuator on the reference plane does not overlap with the orthographic projection area of the active display surface. The utility model discloses an imaging module can reduce the distance between display element and the optical element of image displacement device effectively.
Description
Technical field
The utility model is about a kind of projection arrangement and its image-forming module, and especially in regard to a kind of projection arrangement and its tool
There is the image-forming module of blurring device.
Background technique
Projection arrangement is that one kind can project image on projection screen, the equipment to be presented to user's viewing.And work as
When the image analytic degree that projection arrangement is projected improves, the image presented on the projection screen can have finer image quality.
At present in image shown by general display device, other than common 1080P (1920 × 1080 pixel) image, in recent years
The image of 4K (3840 × 2160 pixel) or more is also more more and more universal.Therefore, each manufacturer is without not towards the solution for improving projection arrangement
The direction effort of analysis degree.
When promoting the resolution of projection arrangement, usually using bigger high-res image-forming component (such as LCD,
DMD, LCoS etc.), or increase additional component to reach the purpose of the resolution of raising.And these ways often to throw
The volume of image device becomes larger, and relevant optics or mechanical organ also must cause the increase of cost and volume with becoming larger.Cause
This, improve projection arrangement resolution when, how simultaneously reduced projection device volume, actually this field related personnel is closed
The focus of note.
Utility model content
The utility model provides a kind of image-forming module, can efficiently reduce the optics member of display element and blurring device
The distance between part reduces the volume of the projection arrangement using this image-forming module, whereby to reduce cost.
The utility model separately provides a kind of projection arrangement, can be with the volume of reduced projection device.
The other objects and advantages of the utility model can be obtained from the technical characteristic disclosed by the utility model into one
The understanding of step.
It is to provide one kind up to one of above-mentioned or part or all of purpose or other purposes, one of the utility model embodiment
Image-forming module, comprising: display element and blurring device.Display element includes active display surface, and active display surface is for connecing
It receives illuminating bundle and illuminating bundle is converted into image strip and transmitting image light beam.Blurring device include optical element,
Bearing seat, pedestal and an at least actuator.Optical element is set on bearing seat.Optical element is located at the transmitting road of image strip
On diameter, and for allowing image strip to pass through.At least an actuator is set on pedestal.One end of actuator connects bearing seat, with
The optical element opposite base on bearing seat is driven to swing.Wherein, the plane where active display surface is reference planes.At least one
The orthographic projection region of actuator on the reference plane is not Chong Die with the orthographic projection region of active display surface.
It is to provide one kind up to one of above-mentioned or part or all of purpose or other purposes, one of the utility model embodiment
Projection arrangement, comprising: lighting system, projection lens, image-forming module.Image-forming module includes display element and blurring device.
Lighting system is for providing illuminating bundle.Display element includes active display surface.Active display surface is for receiving illuminating bundle simultaneously
Illuminating bundle is converted into image strip and transmitting image light beam.Blurring device include optical element, bearing seat, pedestal and
An at least actuator.Optical element is set on bearing seat.Optical element is located on the transmission path of image strip, and for allowing
Image strip passes through, and image strip is transferred to projection lens after passing through optical element.At least an actuator is set on pedestal.It causes
One end of dynamic device connects bearing seat, to drive the optical element opposite base on bearing seat to swing.Wherein, where active display surface
Plane be reference planes, the orthographic projection region of an at least actuator on the reference plane not forward projection region with active display surface
Domain overlapping.
The image-forming module of the utility model embodiment can substantially reduce the distance of display element to optical element, thus answer
With the back focal length of the projection arrangement of this image-forming module from can significantly reduce.The volume of projection arrangement can be reduced and be reduced into
This, can also improve the optical quality of projection arrangement.
For the above-mentioned and other purposes of the utility model, feature and advantage can be clearer and more comprehensible, preferable reality is cited below particularly
Example is applied, and cooperates attached drawing, is described in detail below.
Detailed description of the invention
Fig. 1 is the schematic diagram of the projection arrangement of an embodiment of the present invention.
Fig. 2A~Fig. 2 C is the schematic diagram of the image-forming module of an embodiment of the present invention.
Specific embodiment
In relation to addressing other technologies content, feature and effect before the utility model, in following cooperation with reference to one of attached drawing
In the detailed description of preferred embodiment, can clearly it present.The direction term being previously mentioned in following embodiment, such as: upper,
Under, it is left and right, front or rear etc., be only the direction with reference to annexed drawings.Therefore, the direction term used is for illustrating not to use
To limit the utility model.
Fig. 1 is please referred to, Fig. 1 is the schematic diagram of the projection arrangement of an embodiment of the present invention.Projection arrangement 1 includes illumination
System L, image-forming module 10 and projection lens P.Image-forming module 10 is configured at the transmitting of illuminating bundle IL provided by lighting system L
On path, for illuminating bundle IL to be converted into image strip IM.Projection lens P is configured at the transmission path of image strip IM
On, image strip IM is used for by forming projected light beam IP after projection lens P, and then in forming image frame on perspective plane.
Although being by taking an image-forming module 10 as an example in Fig. 1, in other embodiments, the quantity of image-forming module 10 is also possible to more
It is a.Lighting system L for example may include high-pressure sodium lamp, laser diode (laser diode) or light emitting diode
Elements such as (lightemitting diode), to generate illuminating bundle IL, but the utility model is not limited thereto.
Referring to Fig. 2A~Fig. 2 C, Fig. 2A~Fig. 2 C is the schematic diagram of image-forming module 10 shown in FIG. 1, wherein Fig. 2A
Shown is the decomposition diagram of display element Yu blurring device, is the part member of image-forming module 10 shown by Fig. 2 B
The orthographic projection schematic diagram of the relative position of part is the cross sectional side view of image-forming module 10 shown by Fig. 2 C.As shown in Figure 2 A, originally
The image-forming module 10 of embodiment includes display element 11 and blurring device 23.Image-forming module 10 is located at the biography of image strip IM
It passs on path, wherein blurring device 23 is set between display element 11 and projection lens P.Display element 11 includes actively
Display surface 111, and active display surface 111 is for receiving illuminating bundle IL and illuminating bundle IL being converted into image strip IM and anti-
Penetrate image strip IM.In other embodiments, display element 11 is penetration display element, such as light transmitting liquid crystal panel, then leads
Dynamic display surface 111 is for receiving illuminating bundle IL and illuminating bundle IL being converted into image strip IM and transmits image strip IM
To blurring device 23.In the present embodiment, blurring device 23 includes optical element 131, bearing seat 232, pedestal 236
And actuator 233 and 234.Optical element 131 is set on bearing seat 232.Optical element 131 is located at the transmitting of image strip IM
On path, and for allowing image strip IM to pass through.Actuator is practical new by taking two actuators as an example, but originally in the present embodiment
Type is simultaneously without restriction, single a actuator can be used only in other embodiments or four actuators also can achieve one
The effect of sample.In the present embodiment, actuator 233 and 234 is set on pedestal 236, and wherein pedestal 236 is fixed on projection arrangement 1
It is interior.One end of actuator 233 and one end of actuator 234 are separately connected bearing seat 232, to drive the optics on bearing seat 232
Element 131 is swung relative to pedestal 236, so that optical element 131 changes the image characteristics of image strip IM, refers to changing shadow
As the light conduct path of light beam IM.Therefore, through the setting of blurring device 23, the shadow of projection arrangement 1 can for example be improved
As resolution or the image quality of projected picture etc., but the utility model is not limited thereto.
It is the orthographic projection schematic diagram of the relative position of the subelement of image-forming module shown by Fig. 2 B.As shown in Figure 2 B,
With projection lens P towards from the point of view of the direction of display element 11, the plane definition where the active display surface 111 of display element 11 is
Reference planes S.Orthographic projection of the active display surface 111 on reference planes S is active display surface region (area of active
Displaysurfae) 111p, orthographic projection of the optical element 131 on reference planes S are optical element region 131p, actuator
233 orthographic projection on reference planes S is 233 region 233p of actuator, and orthographic projection of the actuator 234 on reference planes S is
234 region 234p of actuator.In the present embodiment, the area of optical element region 131p is greater than active display surface region 111p's
Area can allow the image strip IM passed over by active display surface 111 all can change image strip IM by optical element 131
Light conduct path.In the present embodiment, orthographic projection actuator zone 233p of the actuator 233,234 on reference planes S,
234p will not be Chong Die with active display surface region 111p, i.e., actuator 233,234 will not or mechanism Chong Die with active display surface 111
Interference is worth being mentioned that so-called overlapping includes partly overlapping.Therefore, display element 11 can as far as possible close to optical element 131,
Blocking without being actuated device 233 or 234, can make active display surface 111 close to optical element 131, and can substantially contract
The volume of small image-forming module 10, and then can be with the volume of reduced projection device 1, and reduce cost.
It is in Fig. 2A shown by Fig. 2 C by the side view of the direction A viewing image-forming module.As shown in Figure 2 C, specifically,
The distance of active display surface 111 to the optical element 131 of display element 11 is first distance d1.The center of active display surface 111
Normal where line be reference line L.Orthographic projection of the actuator 233 or 234 on reference line L is line segment L1, and in line segment L1
The endpoint of neighbouring display element 11 and separate optical element 131 is reference point P1.The distance of reference point P1 to optical element 131 is
Second distance d2.In the present embodiment, first distance d1 is less than second distance d2.As shown in Fig. 2 B, through to bearing seat 232
Design, actuator zone 233p has a length d233 apart from active display surface region 111p, and actuator zone 234p distance is actively
Display surface region 111p has length d234.The actuator zone 233p and 234p of actuator 233 and 234 is apart from active display surface area
The active display surface region 111p in domain 111 has enough distances, i.e. length d233 and length d234 are enough long, therefore active display surface
111 will not have with actuator 233 and 234 is overlapped or contacts.And by such as Fig. 2 C it is found that since actuator 233 and 234 is apart from light
Learning element 131 and display element 11 has a certain distance, thus display element 11 can as close as possible to optical element 131, without
It will receive blocking and the mechanical interferences of actuator 233 or 234.Thus the back focal length of projection arrangement 1 is from (i.e. active display surface 111
To the distance of projection lens P) it can significantly reduce.Lesser back focal length is from can be with the volume and reduction of reduced projection device 1
Cost specifically can be used the projection lens P (using the lens of smaller effective light diameter) of smaller size smaller, can also improve
The optical quality of projection arrangement 1.It is noted that back focal length is with a distance from i.e. active display surface 111 to projection lens P,
It is first to other light transmitting can be set between projection lens P in active display surface 111 on the transmission path of image strip IM
Image strip IM is transferred to projection lens P by part, such as prism or reflecting mirror.
Fig. 2 B and length d233 shown in fig. 2 C and length d234 is only an example, not to limit the utility model.
As long as length d233 and d234 can allow actuator 233,234 on reference planes S the actuator zone 233p of orthographic projection,
234p will not be Chong Die with the active display surface region 111p of active display surface 111.
Specifically, optical element 131 includes plate glass, and plate glass includes incidence surface 1311 and light-emitting surface 1313,
Incidence surface 1311 is relative to light-emitting surface 1313.The image strip IM that display element 11 is formed is by incidence surface 1311 beam incident optical member
Part 131.When using reflective display element, illuminating bundle IL is first by 1313 entrance optical element 131 of light-emitting surface, and by
Incidence surface 1311 is transferred to display element 11.When actuator 233,234 does not drive the optical element 131 on bearing seat 232 opposite
When pedestal 236 is swung, incidence surface 1311 and light-emitting surface 1313 are parallel to active display surface 111.And work as actuator 233,234
When 131 opposite base 236 of optical element on bearing seat 232 being driven to swing, incidence surface 1311 and light-emitting surface 1313 are not parallel to
Active display surface 111.Therefore, 131 opposite base 236 of optical element is driven to swing through actuator 233,234, optical element
131 can change the light conduct path of image strip IM.Such as the image analytic degree or projected picture of projection arrangement 1 can be improved
Image quality etc., but the utility model is not limited thereto.
Specifically, bearing seat 232 includes the first hollowed out area 2321, and optical element 131 is set to the first vacancy section
In domain 2321.Pedestal 236 includes the second hollowed out area 2361, and bearing seat 232 is located in the second hollowed out area 2321.And Fig. 2A and
The structure and shape of bearing seat 232 and pedestal 236 shown in fig. 2 C are only an example, not to limit the utility model.
Subsidiary one mentions, and the active display surface 111 of the incidence surface 1311 of optical element 131 and display element 11 for example can be with
It is rectangle.And it is as shown in Figure 2 B, in the present embodiment, the area of incidence surface 1311 is greater than the area of active display surface 111.Cause
This penetrates the design of bearing seat 232, makes length d233 and length d234 enough long, makes the actuator zone of actuator 233 and 234
233p and 234p has enough distances apart from active display surface region 111p, can make the image 111p of active display surface 111 not
It can be overlapped or contact with image 233p and 234p.In the case where not needing to increase the area of optical element 131, so that it may allow aobvious
Show blocking or the mechanical interferences close to optical element 131, without being actuated device 233 or 234 of element 11 as far as possible.It therefore can
With in the case where not increasing optical element cost, substantially the back focal length of reduced projection device 1 from.
It is worth noting that, the present embodiment is that 2 actuators 233 and 234 are arranged as an example with blurring device 23
Illustrate, but the utility model is not intended to limit quantity and the position for the actuator that blurring device 23 includes.Blurring device
23 may include an at least actuator, as long as and actuator can drive bearing seat 232 to swing and will not stop display element
11 setting.In addition, actuator 233,234 for example can be voice coil actuator (Voice CoilMotor, VCM) or pressure
Electroceramics device, the utility model are not limited thereto.In the present embodiment, actuator 233 is for example including magnet 233a and line
Enclose 233b.And in the present embodiment, it is to be set to coil 233b on pedestal 236, magnet 233a is connected to 232 conduct of bearing seat
It illustrates.Therefore, actuator 233 can drive bearing seat 232 to swing in movement.And in other implementations of the utility model
In example, the magnet of actuator, which can be, to be set on pedestal 236, and coil can be and be connected to bearing seat 232, this is practical new
Type is not limited thereto.Actuator 234 includes magnet 234a and coil 234b, and action and function is similar to actuator 233,
This is simultaneously repeated no more.
Specifically, what bearing seat 232 and pedestal 236 can also for example be connected to each other through elastic component 235a and 235b.
Elastic component 235a and 235b drive bearing seat 232 opposite for fixing bearing seat 232 and pedestal 236 in actuator 233,234
When pedestal 236 is swung, elastic component 235a and 235b can be with corresponding elastic rotations.And the utility model is not intended to limit elastic component
Material, structure, setting position or the quantity of 235a and 235b.
In addition, the display element 11 of projection arrangement 1 for example can be digital micromirror device (Digital
Micromirror Device, DMD) or liquid crystal cover silicon display device (Liquid Crystal On Silicon, LCoS).This
Outside, display element 11 for example can be the spatial light modulator of transmission-type, such as light transmitting liquid crystal panel (Transparent
Liquid Crystal Panel) and, according to the difference of input control signal mode, optical modulator 120 is, for example, light addressing
Spatial light modulator (Optically addressed spatial light modulator, OASLM) either electrical addressing
Spatial light modulator (Electrically addressed spatial light modulator, EASLM), the utility model
Kenel and its type to display element 11 are simultaneously without restriction.For the active display surface 111 of display element 11 refer to by
The surface of light beam modulation is generated by electric signal driving display element 11, active display surface 111 can allow illuminating bundle IL to form shadow
As light beam IM.
In conclusion the image-forming module of the embodiments of the present invention can substantially reduce display element to optical element
Distance, thus the back focal length of the projection arrangement of application this image-forming module is from can significantly reduce.The volume of projection arrangement can be with
Cost is reduced and reduced, the optical quality of projection arrangement can also be improved.In addition, the utility model is in order to avoid working as display element
Closer to blurring device optical element when have mechanical interferences the problem of, the image-forming module of the utility model is not changing
In the case where the previous upper optics element size of design, the direction that at least will unanimously move device toward separate optical element is mobile.At other
In embodiment, if can be moved outside to the side (such as four sides) of optical element using multiple actuators.
Only as described above, the only preferred embodiment of the utility model, when the utility model cannot be limited with this
The range of implementation, i.e., all simple equivalence changes made according to the utility model claims book and utility model content with repair
Change, all still belongs in the range that the utility model patent covers.In addition, any embodiment or claim of the utility model are not necessary to
Reach the disclosed whole purpose of the utility model or advantage or feature.In addition, abstract and topic are intended merely to auxiliary patent text
Part search is used, and not is used to limit the interest field of the utility model.In addition, being referred in this specification or claims
" first ", the terms such as " second " only to name the title or the different embodiments of difference or range of element (element), and simultaneously
It is non-to be used to the quantitative upper limit of restriction element or lower limit.
Claims (17)
1. a kind of image-forming module, which is characterized in that the image-forming module includes display element and blurring device, in which:
The display element includes active display surface, and the active display surface is for receiving illuminating bundle and by the illuminating bundle
It is converted into image strip and transmits the image strip；And
The blurring device includes that optical element, bearing seat, pedestal and an at least actuator, the optical element are set to
On the bearing seat, the optical element is located on the transmission path of the image strip, and for making the image strip logical
It crosses, an at least actuator is set on the pedestal, and one end of an at least actuator connects the bearing seat, to drive
It moves the relatively described pedestal of the optical element on the bearing seat to swing, wherein the plane where the active display surface is
Reference planes, the not positive throwing with the active display surface of orthographic projection region of at least actuator in the reference planes
The overlapping of shadow zone domain.
2. image-forming module as described in claim 1, which is characterized in that the distance of the active display surface to the optical element
It is first distance, the line where the normal at the center of the active display surface is reference line, and an at least actuator is described
In the line segment of orthographic projection on reference line, the endpoint of the neighbouring display element and the separate optical element is reference point, institute
The distance for stating reference point to the optical element is second distance, and the first distance is less than the second distance.
3. image-forming module as described in claim 1, which is characterized in that the optical element includes plate glass, the plate
Glass includes incidence surface and light-emitting surface, and the incidence surface is entered relative to the light-emitting surface, the image strip by the incidence surface
The optical element is penetrated, an at least actuator does not drive the relatively described pedestal pendulum of the optical element on the bearing seat
When dynamic, the incidence surface and the light-emitting surface are parallel to the active display surface, and described in being driven when an at least actuator
When the optical element pedestal relatively on bearing seat is swung, the incidence surface and the light-emitting surface are not parallel to the master
Dynamic display surface.
4. image-forming module as claimed in claim 3, which is characterized in that the incidence surface and the active display surface are rectangles.
5. image-forming module as claimed in claim 4, which is characterized in that the area of the incidence surface is greater than the active display surface
Area.
6. image-forming module as described in claim 1, which is characterized in that the bearing seat includes the first hollowed out area, the light
It learns element to be set in first hollowed out area, the pedestal includes the second hollowed out area, and the bearing seat is located at described the
In two hollowed out areas.
7. image-forming module as described in claim 1, which is characterized in that an at least actuator is voice coil actuator or piezoelectricity
Ceramic device.
8. image-forming module as described in claim 1, which is characterized in that an at least actuator includes magnet and coil,
Described in magnet be set on the pedestal, the coil connects the bearing seat；Or the coil is set on the pedestal,
The magnet connects the bearing seat.
9. image-forming module as described in claim 1, which is characterized in that the display element be digital micromirror device,
Liquid crystal covers silicon display device either light transmitting liquid crystal panel.
10. a kind of projection arrangement, which is characterized in that the projection arrangement includes lighting system, projection lens and image-forming module,
Wherein:
The lighting system is for providing illuminating bundle；And
The image-forming module includes display element and blurring device, in which:
The display element includes active display surface, and the active display surface is for receiving the illuminating bundle and by the illumination
Light beam is converted into image strip and transmits the image strip；And
The blurring device includes that optical element, bearing seat, pedestal and an at least actuator, the optical element are set to
On the bearing seat, the optical element is located on the transmission path of the image strip, and for making the image strip logical
It crosses, the image strip is transferred to the projection lens after passing through the optical element, and an at least actuator is set to institute
It states on pedestal, one end of an at least actuator connects the bearing seat, to drive the optics member on the bearing seat
The relatively described pedestal of part is swung, wherein the plane where the active display surface is reference planes, and an at least actuator exists
Orthographic projection region in the reference planes is not Chong Die with the orthographic projection region of the active display surface.
11. projection arrangement as claimed in claim 10, which is characterized in that the active display surface to the optical element away from
From being first distance, the line where the normal at the center of the active display surface is reference line, and an at least actuator is in institute
In the line segment for stating the orthographic projection on reference line, the endpoint of the neighbouring display element and the separate optical element is reference point,
The distance of the reference point to the optical element is second distance, and the first distance is less than the second distance.
12. projection arrangement as claimed in claim 10, which is characterized in that the optical element includes plate glass, described flat
Glass sheet includes incidence surface and light-emitting surface, and the incidence surface is relative to the light-emitting surface, and the image strip is by the incidence surface
The incident optical element, an at least actuator do not drive the relatively described pedestal of the optical element on the bearing seat
When swing, the incidence surface and the light-emitting surface are parallel to the active display surface, and when an at least actuator drives institute
When stating the optical element on the bearing seat pedestal relatively and swinging, the incidence surface and the light-emitting surface are not parallel to described
Active display surface.
13. projection arrangement as claimed in claim 12, which is characterized in that the incidence surface and the active display surface are squares
Shape.
14. projection arrangement as claimed in claim 13, which is characterized in that the area of the incidence surface is greater than the active and shows
The area in face.
15. projection arrangement as claimed in claim 10, which is characterized in that the bearing seat includes the first hollowed out area, described
Optical element is set in first hollowed out area, and the pedestal includes the second hollowed out area, and the bearing seat is located at described
In second hollowed out area.
16. projection arrangement as claimed in claim 10, which is characterized in that an at least actuator is voice coil actuator or pressure
Electroceramics device.
17. projection arrangement as claimed in claim 10, which is characterized in that an at least actuator includes magnet and coil,
Wherein the magnet is set on the pedestal, and the coil connects the bearing seat；Or the coil is set to the pedestal
On, the magnet connects the bearing seat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821018848.7U CN208351228U (en) | 2018-06-29 | 2018-06-29 | Projection device and imaging module thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821018848.7U CN208351228U (en) | 2018-06-29 | 2018-06-29 | Projection device and imaging module thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208351228U true CN208351228U (en) | 2019-01-08 |
Family
ID=64881219
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821018848.7U Withdrawn - After Issue CN208351228U (en) | 2018-06-29 | 2018-06-29 | Projection device and imaging module thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208351228U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110658665A (en) * | 2018-06-29 | 2020-01-07 | 中强光电股份有限公司 | Projection device and imaging module thereof |
| CN111505785A (en) * | 2019-01-31 | 2020-08-07 | 中强光电股份有限公司 | Fixing base and projection device |
| US11143940B2 (en) | 2019-05-07 | 2021-10-12 | Coretronic Corporation | Optical module and projector |
-
2018
- 2018-06-29 CN CN201821018848.7U patent/CN208351228U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110658665A (en) * | 2018-06-29 | 2020-01-07 | 中强光电股份有限公司 | Projection device and imaging module thereof |
| CN110658665B (en) * | 2018-06-29 | 2021-10-01 | 中强光电股份有限公司 | Projection device and imaging module thereof |
| CN111505785A (en) * | 2019-01-31 | 2020-08-07 | 中强光电股份有限公司 | Fixing base and projection device |
| US11143940B2 (en) | 2019-05-07 | 2021-10-12 | Coretronic Corporation | Optical module and projector |
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