CN206020829U - A kind of projection screen speckle removal device - Google Patents
A kind of projection screen speckle removal device Download PDFInfo
- Publication number
- CN206020829U CN206020829U CN201621053229.2U CN201621053229U CN206020829U CN 206020829 U CN206020829 U CN 206020829U CN 201621053229 U CN201621053229 U CN 201621053229U CN 206020829 U CN206020829 U CN 206020829U
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- piezoelectric fabric
- projection screen
- actuator
- removal device
- piezoelectric
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Abstract
This utility model is related to laser projection system technical field, especially a kind of projection screen speckle removal device, including：Attach multiple piezoelectric fabric actuators on the projection screen, the piezoelectric fabric actuator is contrary by two panels polarised direction and piezoelectric fabric piece that be overlapped mutually is constituted, after on-load voltage, piezoelectric fabric piece perpendicular to projection screen stretch generation opposition make projection screen vibrate；To the piezoelectric fabric driver that the piezoelectric fabric actuator provides voltage, the piezoelectric fabric driver is electrically connected with the piezoelectric fabric actuator；For controlling the piezoelectric fabric controller of the output voltage pulse signal of the piezoelectric fabric actuator.The piezoelectric fabric piece that this utility model is overlapped mutually by two panels is flexible perpendicular to projection screen, makes projection screen vibration to eliminate speckle, is highly suitable for the transformation to existing movie theater, easy for installation, low cost and does not affect the service life of projection screen.
Description
Technical field
This utility model is related to laser projection system technical field, especially a kind of projection screen speckle removal device.
Background technology
Laser projection has life-span length, but when image passes through laser projections on projection screen, due to swashing
The coherence of light, reflected light have the light beats of different optical path differences, reflection or scattering and can interfere when space is met now
As.When a lot of bin of number is randomly distributed, it can be observed that the pattern of the nutty structure of random distribution, here it is institute
The laser speckle (nutty structure speckle is referred to as speckle) of meaning, visually can will produce speckle, and strong influence is viewed and admired
Effect, brings greatly inconvenience to user.The speckle phenomena of projection screen has a strong impact on presentation picture quality, particularly laser
Projection screen speckle issue in projection system, is the problem that must be solved in the industry.Existing solution has regulation laser projection mirror
Head, the visible light semiconductor laser for developing broader spectrum, random phase piece and vibration screen etc..Maximally effective one kind at present
Speckle technology for eliminating is exactly to vibrate screen, and existing screen mode of vibration has many kinds, such as using eccentric vibration screen frame,
Screen frame is vibrated using magnetic force and carry out screen vibration using infrasonic wave, but apparatus above all has respective defect, shakes
The mode of dynamic screen cannot be ensured due to for the purely mechanic of framework, carrying out the vibration frame life-span for a long time, and vibration type framework
Complex structure, needs are individually customized, and price is high；Infrasonic sound waves screen vibrates, and needs additionally to build a sub-frame, and each
Individual point is required for a set of Subsonic wave generator, and constructional difficulties price is higher, and in addition the large-scale use of infrasonic sound wave apparatus may
There is the injury to human body.
Utility model content
When this utility model is for removal projection screen speckle set forth above, the projection screen life-span is low, constructional difficulties, valency
Lattice are high, have the problem of injury to human body, and research design a kind of easy for installation, work well and the service life to projection screen
Without the projection screen speckle removal device for affecting.
The technical solution adopted in the utility model is：
A kind of projection screen speckle removal device, it is characterised in that the speckle removal device includes：
Multiple piezoelectric fabric actuators on the projection screen are attached, the piezoelectric fabric actuator is by two panels polarised direction
Piezoelectric fabric piece composition that is contrary and being overlapped mutually, after on-load voltage, piezoelectric fabric piece stretches generation perpendicular to projection screen
Opposition vibrates projection screen；
To the piezoelectric fabric actuator provide voltage piezoelectric fabric driver, the piezoelectric fabric driver with described
Piezoelectric fabric actuator is electrically connected.
Further, the piezoelectric fabric actuator is pasted with the projection screen by epoxide-resin glue and is fixed.
Further, the speckle removal device also includes the output voltage arteries and veins for controlling the piezoelectric fabric actuator
Rush the piezoelectric fabric controller of signal.
Further, the distance between adjacent described piezoelectric fabric actuator≤3000mm.
Further, the length of the piezoelectric fabric driver is 30～200mm, and width is 8～90mm.
Further, the piezoelectric fabric actuator is 9, and rectangular array is distributed on the projection screen.
Further, the piezoelectric fabric actuator is 13, and four angles of the projection screen respectively arrange one, its
9 piezoelectric fabric actuator rectangular arrays of remaininging are distributed on the projection screen.
Relative to prior art, this utility model apparently has the advantages that：
1st, the piezoelectric fabric actuator that this utility model is adopted is flake, and quality is little, only need to paste peace with projection screen
Dress, easy for installation, be highly suitable for the retrofit work to existing movie theater, it is only necessary on original screen according to projection screen region
Mounted, very convenient.
2nd, need not on original projection screen installation frame, do not affect the service life of projection screen.
3rd, piezoelectric fabric actuator is contrary by two panels polarised direction and piezoelectric fabric piece that be overlapped mutually is constituted, on-load voltage
Afterwards, two panels piezoelectric fabric piece applies opposition to projection screen, drives projection screen to be distorted and deforms and produce vibration,
To eliminate speckle.
Description of the drawings
Fig. 1 is 1 structural representation of this utility model embodiment；
Fig. 2 is 2 structural representation of this utility model embodiment.
In figure, 1, projection screen, 2, piezoelectric fabric actuator, 3, piezoelectric fabric driver, 4, piezoelectric fabric controller.
Specific embodiment
In order that technical problem, technical scheme and beneficial effect that this utility model is solved become more apparent, below
In conjunction with drawings and Examples, this utility model is further elaborated.It should be appreciated that described herein be embodied as
Example only in order to explain this utility model, is not used to limit this utility model.
In description of the present utility model, it is to be understood that term " radially ", " axial direction ", " on ", D score, " top ",
The orientation of instruction such as " bottom ", " interior ", " outward " or position relationship are based on orientation shown in the drawings or position relationship, merely to just
In description this utility model and simplified description, rather than the device or element of instruction or hint indication must have specifically side
Position, with specific azimuth configuration and operation, therefore it is not intended that to restriction of the present utility model.In description of the present utility model
In, unless otherwise stated, " multiple " are meant that two or more.
In description of the present utility model, it should be noted that unless otherwise clearly defined and limited, term " peace
Dress ", " setting ", " connection " should be interpreted broadly, for example, it may be fixedly connected, or be detachably connected, or integratedly
Connection；Can be joined directly together, it is also possible to be indirectly connected to by intermediary.For the ordinary skill in the art,
Concrete meaning of the above-mentioned term in this utility model can be understood as the case may be.
Embodiment 1
1 speckle removal device of projection screen as shown in Figure 1, including：Piezoelectric fabric actuator 2, piezoelectric fabric driver 3
With piezoelectric fabric controller 4.
Piezoelectric fabric actuator 2 is pasted onto on projection screen 1 by materials such as epoxide-resin glues, piezoelectric fabric actuator 2
Piezoelectric fabric piece that is contrary by two panels polarised direction and being overlapped mutually is constituted, and after on-load voltage, piezoelectric fabric piece is perpendicular to projection
The flexible opposition for producing of screen 1 vibrates projection screen 1；
Piezoelectric fabric actuator 2 is flake, is set according to the size of projection screen 1 and the specification of piezoelectric fabric actuator 2
The distance between the number of piezoelectric fabric actuator 2, general adj acent piezoelectric fiber actuator 2≤3000mm is put, optimal to reach
Screen vibrating effect.In the present embodiment, piezoelectric fabric actuator 2 is 9, and rectangular array is distributed on projection screen 1.Choosing
Pressure electricity Fiber actuator 3 length be 30～200mm, width be 8～90mm, due to piezoelectric fabric actuator 2 quality only
For, between 5～20g, quality is less, and projection screen 1 is generally high gain metallic entrant sound projection screen, piezoelectric fabric actuator 2
Will not make projection screen 1 that obvious deformation occurs after pasting on projection screen 1.
Piezoelectric fabric driver 3 is electrically connected with piezoelectric fabric actuator 2, is that each piezoelectric fabric actuator 2 provides voltage, is made
The two panels piezoelectric fabric piece of piezoelectric fabric actuator 2 stretches to the rightabout perpendicular to projection screen 1 respectively, causes projection screen
There is small distortion deformation and produce vibration in curtain 1.Although piezoelectric fabric piece is very thin, and light weight, maximum number can be produced
The distortion power of hectonewton and corresponding displacement, the vibrating effect of projection screen 1 are very good.
Piezoelectric fabric controller 4 is electrically connected with piezoelectric fabric driver 3, controls the output voltage of piezoelectric fabric driver 3
The frequency of pulse signal, to adjust the frequency of vibration of piezoelectric fabric actuator 2.
Embodiment 2
As shown in Fig. 2 in order to reach more preferable vibrating effect, in the present embodiment, piezoelectric fabric actuator 2 is 13, projection
Four angles of screen 1 respectively arrange one, and remaining 9 rectangular array is distributed on projection screen 1.
Piezoelectric fabric driver 3 can also on projection screen 1 circumference uniform distribution, as long as projection screen 1 can be made to vibrate uniformly,
There is no significantly deformation.
Above-mentioned is enlightenment according to desirable embodiment of the present utility model, by above-mentioned description, relevant staff
Various change and modification can be carried out completely in the range of without departing from this utility model technological thought.This practicality
New technical scope is not limited to the content in description, it is necessary to determine which according to right technical
Scope.
Claims (7)
1. a kind of projection screen speckle removal device, it is characterised in that the speckle removal device includes：
Multiple piezoelectric fabric actuator (2) being attached on projection screen (1), piezoelectric fabric actuator (2) are by two panels pole
Change piezoelectric fabric piece composition that is in opposite direction and being overlapped mutually, after on-load voltage, piezoelectric fabric piece is stretched perpendicular to projection screen (1)
The opposition that contracting is produced vibrates projection screen (1)；
To the piezoelectric fabric driver (3) that described piezoelectric fabric actuator (2) provide voltage, piezoelectric fabric driver (3)
Electrically connect with piezoelectric fabric actuator (2).
2. projection screen speckle removal device according to claim 1, it is characterised in that the piezoelectric fabric actuator
(2) pasted with the projection screen (1) by epoxide-resin glue and fixed.
3. projection screen speckle removal device according to claim 1, it is characterised in that the speckle removal device is also wrapped
Include the piezoelectric fabric controller (4) of the output voltage pulse signal for controlling piezoelectric fabric actuator (2).
4. projection screen speckle removal device according to claim 1, it is characterised in that the adjacent piezoelectric fabric is actuated
The distance between device (2)≤3000mm.
5. the projection screen speckle removal device according to any one of claim 1-4, it is characterised in that the piezoelectric fabric
The length of driver (3) is 30～200mm, and width is 8～90mm.
6. projection screen speckle removal device according to claim 1, it is characterised in that the piezoelectric fabric actuator
(2) it is 9, rectangular array is distributed on the projection screen (1).
7. projection screen speckle removal device according to claim 1, it is characterised in that the piezoelectric fabric actuator
(2) it is 13, four angles of projection screen (1) respectively arrange one, remaining 9 piezoelectric fabric actuator (2) rectangular array
It is distributed on the projection screen (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621053229.2U CN206020829U (en) | 2016-09-13 | 2016-09-13 | A kind of projection screen speckle removal device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621053229.2U CN206020829U (en) | 2016-09-13 | 2016-09-13 | A kind of projection screen speckle removal device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206020829U true CN206020829U (en) | 2017-03-15 |
Family
ID=58261034
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621053229.2U Expired - Fee Related CN206020829U (en) | 2016-09-13 | 2016-09-13 | A kind of projection screen speckle removal device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206020829U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107086153A (en) * | 2017-04-27 | 2017-08-22 | 上海交通大学 | A kind of convertible multi-channel switch based on liquid metal |
| CN107656412A (en) * | 2017-10-17 | 2018-02-02 | 深圳市中科创激光技术有限公司 | A kind of contact eliminating coherence system |
| CN108319099A (en) * | 2018-03-09 | 2018-07-24 | 芜湖影星巨幕有限公司 | A kind of small vibrating device for eliminating speckle applied to laser light source projection screen |
| CN110609394A (en) * | 2019-10-17 | 2019-12-24 | 杭州中科极光科技有限公司 | Laser speckle eliminating device and projection system |
| CN113674662A (en) * | 2021-07-23 | 2021-11-19 | 华为技术有限公司 | Display system and control method thereof, projector and projection system |
| WO2023196195A1 (en) * | 2022-04-07 | 2023-10-12 | Dolby Laboratories Licensing Corporation | Speckle mitigation for projection screens |
-
2016
- 2016-09-13 CN CN201621053229.2U patent/CN206020829U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107086153A (en) * | 2017-04-27 | 2017-08-22 | 上海交通大学 | A kind of convertible multi-channel switch based on liquid metal |
| CN107086153B (en) * | 2017-04-27 | 2019-04-16 | 上海交通大学 | A kind of convertible multi-channel switch based on liquid metal |
| CN107656412A (en) * | 2017-10-17 | 2018-02-02 | 深圳市中科创激光技术有限公司 | A kind of contact eliminating coherence system |
| CN108319099A (en) * | 2018-03-09 | 2018-07-24 | 芜湖影星巨幕有限公司 | A kind of small vibrating device for eliminating speckle applied to laser light source projection screen |
| CN110609394A (en) * | 2019-10-17 | 2019-12-24 | 杭州中科极光科技有限公司 | Laser speckle eliminating device and projection system |
| CN113674662A (en) * | 2021-07-23 | 2021-11-19 | 华为技术有限公司 | Display system and control method thereof, projector and projection system |
| WO2023196195A1 (en) * | 2022-04-07 | 2023-10-12 | Dolby Laboratories Licensing Corporation | Speckle mitigation for projection screens |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20170919 Address after: 135100 Jilin city of Jilin province Huinan County town of Chaoyang West Street three prosperous Committee five group Patentee after: Han Tao Address before: 518052 Guangdong city of Shenzhen province Nanshan District Taoyuan road Qianhai garden three building 40 16D Patentee before: Zhang Jian |
|
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20180730 Address after: 100176 Beijing Yongchang economic and Technological Development Zone 3 North Road 3 building 8304 unit 3 level -1 Patentee after: BEIJING WEISHI JOINT TECHNOLOGY CO., LTD. Address before: 135100 group three, five, Qianqiang street, Chaoyang Town, Hui Nan county, Jilin, Jilin Patentee before: Han Tao |
|
| TR01 | Transfer of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170315 Termination date: 20190913 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |