CN106950782B - It is a kind of for determining the method and device of screen prjection automatic Proofreading - Google Patents
It is a kind of for determining the method and device of screen prjection automatic Proofreading Download PDFInfo
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- CN106950782B CN106950782B CN201710332096.5A CN201710332096A CN106950782B CN 106950782 B CN106950782 B CN 106950782B CN 201710332096 A CN201710332096 A CN 201710332096A CN 106950782 B CN106950782 B CN 106950782B
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Classifications
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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
- G03B21/14—Details
- G03B21/147—Optical correction of image distortions, e.g. keystone
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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
- G03B21/14—Details
- G03B21/142—Adjusting of projection optics
Abstract
It is specifically a kind of for determining the method and device of screen prjection automatic Proofreading the present invention relates to a kind of projection device.It is a kind of for determining the device of screen prjection automatic Proofreading, including projector, further include the screen sensing device that screen display location quadrangle is set；Camera lens servo mechanism is additionally provided in projector, camera lens servo mechanism connect with projector lens and can control the movement that projector lens carry out 360 degree；Checking module, checking module and the electrical connection of camera lens servo mechanism are pre-installed in projector, screen sensing device feedback signal is to checking module；Checking module includes light-beam transmitter and controller, and light-beam transmitter follows projector lens mobile, and controller receives screen sensing device signal after processing compares, and issues and instructs to camera lens servo mechanism.The present invention by software and hardware combine in the way of, automatically the projection device for determining screen is proofreaded, check and correction effect it is more preferable, avoid the problem for manually adjusting the check and correction effect difference being likely to occur.
Description
Technical field
It is specifically a kind of for determining the method and device of screen prjection automatic Proofreading the present invention relates to a kind of projection device.
Background technique
Projector is a kind of equipment that can be projected image or video on projection screen, is projected on projection screen
Image or several times are presented in the case where keeping clarity for video or decades of times amplifies, facilitate people to watch,
The open visual field of people is given, therefore is received praises from customers.But current projector, laser movie theatre etc. there are many fixation
The projection device of screen, i.e. screen position are fixed, and drop shadow spread is fixed, and the position that these projection devices also need projector is wanted
It is fixed, it needs to re-start adjustment once displacement, particularly with the laser cinema projection systems of short focus, precisely aligns screen
Careful mobile projector device is needed, and since focal length is very short, manual setting is difficult to obtain optimum focusing, if desktop and metope
There are verticality and angle equal error also to will affect the effect and clarity of display, it is difficult to obtain optimized image size and display effect
Fruit.
Summary of the invention
Problem to be solved by this invention is to overcome the deficiencies of the prior art and provide one kind for determining the automatic school of screen prjection
Pair method and device, can automatically carry out the check and correction of screen size and focal length.
To solve the above problems, the technical solution adopted by the present invention is that: it is a kind of for determining the dress of screen prjection automatic Proofreading
It sets, including projector, further includes screen sensing device, the quadrangle of screen display location is arranged in the screen sensing device；?
Camera lens servo mechanism is additionally provided in projector, the camera lens servo mechanism connect with projector lens and can control projector mirror
Head carries out 360 degree of movement；Checking module, the checking module and the electrical connection of camera lens servo mechanism, institute are pre-installed in projector
Screen sensing device feedback signal is stated to checking module；The checking module includes light-beam transmitter and controller, the light beam
Transmitter follows projector lens mobile, and controller receives screen sensing device signal after processing compares, to camera lens servo
Structure issues instruction.
Preferably, the light-beam transmitter can emit the letter of mutually perpendicular modulation laser signal light beam a and square
Number light beam b；The modulation laser signal light beam first passes through spatial digitalized FM encoding in advance, and along side vertical with itself
To being constantly scanned, the signal beams b of the square is slowly amplified to cloth flooding from as low as big.
Preferably, the screen sensing device uses light sensor.
Preferably, the screen sensing device is counted in real time by the modes such as cable, network or bluetooth and checking module
According to connection.
Preferably, the checking module is also connected with alarm device.
A method of for determining screen prjection automatic Proofreading, comprising the following steps:
(1) projector is opened, into adjustment state, projector launches the square signal beams of a maximum magnitude, simultaneously
Camera lens does the Fast Activities of maximum magnitude, and screen sensing device is capped feedback signal；
(2) when the equal feedback signal of four screen sensing devices, projector enters adjust automatically state；When projector is launched
Light beam when cannot all cover four screen sensing devices, checking module, which issues signal, makes alarm device alarm, it is desirable that artificial
Intervene, carries out artificial coarse adjustment, until after four screen sensing devices can all receive beam signal, into adjust automatically shape
State；
(3) light-beam transmitter can emit the signal beams b of mutually perpendicular modulation laser signal light beam a and square；
The modulation laser signal light beam is constantly scanned, and the signal beams b of the square is slowly amplified to cloth from as low as big
Flooding；When the signal beams b of square covers some screen sensing device, modulation laser signal light beam scanning to screen
Curtain sensing device, screen sensing device carry out signal feedback to checking module；
(4) checking module compares the signal for proofreading module feedback and prefabricated reference signal, extracts error signal
Form correction instruction, control camera lens servo mechanism correction, until screen sensing device receives four corners of laser beam
Position signal, projected light beam is overlapped with four corners with screen sensing device at this time, and the position adjustment of projection terminates；
(5) clarity adjusts, and lens focus is carried out to the adjustment of front and back, and the light signal that screen sensing device senses is anti-
It feeds controller, if controller analyte signal intensity is gradually enhancing, order camera lens servo mechanism continues to adjust according to current
Perfect square is to adjustment；Gradually declining if controller receives the signal strength that screen sensing device senses, according to opposite
Direction is adjusted；When the signal that screen sensing device receives, which reaches, most to be started to decline by force, illustrate to reach most
Good focal length state, controller calculate intensity drop point to the location parameter of current point, then to control camera lens servo mechanism reversely micro-
It adjusts, reaches and most emphasize entire signal, Focussing terminates.
The working principle of the invention is specific as follows:
Screen sensing device is placed on to the quadrangle of view field, projection signal can be incuded and is fed back.
Screen sensing device is realized to the location aware of drop shadow spread using laser adjustment beam modulation, and laser is a kind of light
Frequency electromagnetic waves have good coherence, and information, which is loaded on laser, using spatial digitalized FM encoding becomes modulation laser
Signal beams, spatial digitalized FM encoding are one kind of spatial intensity modulation coding, it, which is used, makes in beam cross-section not
There is different light pulses with position, and show as digitized signal.In the cross section of laser adjustment light beam projection (screen),
With two mutually orthogonal shape of rectangular ribbon light beam mixed sweeps, transmitting synchronizes square signal beams when scanning is to screen midpoint
The edge of b, two laser adjustment light beams should be overlapped with two outer side edges of the synchronization signal light beam of square respectively, and laser tune
The movement speed of side should be consistent when the speed of whole light beam scanning expands with the synchronization signal light beam of square, can protect in this way
The synchronization signal light beam outer side edges of card laser adjustment light beam and square reach screen sensing device simultaneously, and then perceived and anti-
Feedback.
Be prefixed in checking module lens location it is accurate when, screen sensing device receive laser adjustment light beam number
Signal, and if lens location is not right, it issues laser adjustment light beam and the signal beams b of square just also can be with identical
Angular error projection on the screen.In this case, when the signal beams b of laser adjustment light beam and square reaches screen induction
It is not screen sensing device to be reached with state horizontally or vertically, but deflected condition at a certain angle reaches when device
Screen sensing device, the digital signal that such words screen sensing device position receives necessarily is different, by practical reception
To digital signal and preset digital signal sequences be compared, base this extract error signal formed correction instruction.
It after camera lens servo-system receives correction instruction, is acted, while the signal light of laser adjustment light beam and square
Beam b is still in continuous scanning transmitting, and until projected light beam is overlapped with four corners with sensor, position adjustment terminates.
Adjustment about focal length: controller controls the adjustment that the focusing of camera lens servo mechanism carries out front and back, screen induction dress
It sets the light signal sensed and feeds back to controller, if controller analyte signal intensity is gradually enhancing, order camera lens is watched
Mechanism is taken to continue to adjust according to current adjustment direction；Exist if controller receives the signal strength that screen sensing device senses
Gradually decline, is then adjusted according to opposite direction；Most start under appearance by force when the signal that screen sensing device receives reaches
When drop, illustrate to reach pinpointed focus state, controller calculates intensity drop point to the location parameter of current point, then controls
Camera lens servo mechanism is reversely finely tuned, and is reached and is most emphasized entire signal, and Focussing terminates.
About artificial coarse adjustment: projector can launch the square signal beams of a maximum magnitude first, while camera lens is done most
Large-scale Fast Activities, can feedback signal after screen sensing device is capped；When four equal feedback signals of screen sensing device
When, projector enters adjust automatically state；When the light beam that projector is launched cannot all cover four screen sensing devices, table
Bright lens location and base position gap are too big, and checking module, which issues signal, makes alarm device alarm, it is desirable that manual intervention carries out
Artificial coarse adjustment；
The beneficial effects of the present invention are: by software and hardware combine in the way of, the automatically projection to screen is determined
Equipment is proofreaded, and check and correction effect is more preferable, avoids the problem for manually adjusting the check and correction effect difference being likely to occur.
Appended drawing reference
Fig. 1 is screen prjection state when normally showing；
Fig. 2 is the signal beams state that laser signal light beam and square are modulated when normally showing；
Screen prjection state when Fig. 3 is abnormal display；
The signal beams state of laser signal light beam and square is modulated when Fig. 4 is abnormal display；
Fig. 5 is structure connection block diagram of the invention；
Fig. 6 is the flow chart of software section in the present invention.
Wherein appended drawing reference is as follows:
1, projector；2, screen sensing device；3, camera lens servo mechanism；4, checking module；41, light-beam transmitter；42, it controls
Device processed；A, laser signal light beam is modulated；B, square signal beams.
Specific embodiment
The present invention is described further with reference to the accompanying drawing:
A kind of further includes screen sensing device 2 for determining the device of screen prjection automatic Proofreading, including projector 1, described
The quadrangle of screen display location is arranged in screen sensing device 2；Camera lens servo mechanism 3, the mirror are additionally provided in projector 1
Head servo mechanism 3 connect with 1 camera lens of projector and can control the movement that 1 camera lens of projector carries out 360 degree；It is pre- in projector 1
Checking module 4 is filled, the checking module 4 and camera lens servo mechanism 3 are electrically connected, and 2 feedback signal of screen sensing device is to school
To module 4；The checking module 4 includes light-beam transmitter 41 and controller 42, and controller 42 receives 2 signal of screen sensing device
After processing compares, camera lens servo mechanism 3 is issued and is instructed.
Light-beam transmitter 41 can emit the signal beams b of mutually perpendicular modulation laser signal light beam a and square；Institute
It states modulation laser signal light beam a and first passes through spatial digitalized FM encoding in advance, and is continuous along direction vertical with itself
It is scanned, the signal beams b of the square is slowly amplified to cloth flooding from as low as big.
Screen sensing device 2 uses light sensor, and the screen sensing device 2 passes through the side such as cable, network or bluetooth
Formula and checking module 4 carry out real data relation, and checking module 4 is also connected with alarm device 5.
A method of for determining screen prjection automatic Proofreading, comprising the following steps:
(1) projector 1 is opened, into adjustment state, projector 1 launches the square signal beams of a maximum magnitude, together
Shi Jingtou does the Fast Activities of maximum magnitude, and screen sensing device 2 is capped feedback signal；
(2) when four screen 2 equal feedback signals of sensing device, projector 1 enters adjust automatically state；When projector 1
When the light beam launched cannot all cover four screen sensing devices 2, checking module 4, which issues signal, makes alarm device 5 alarm, and
Manual intervention is asked, artificial coarse adjustment is carried out, until after four screen sensing devices 2 can all receive beam signal, into automatic
Adjustment state；
(3) light-beam transmitter can emit the signal beams b of mutually perpendicular modulation laser signal light beam a and square；
The modulation laser signal light beam a is constantly scanned, and the signal beams b of the square is slowly amplified to cloth from as low as big
Flooding；When the signal beams b of square covers some screen sensing device 2, modulation laser signal light beam a scanning is arrived
Screen sensing device 2, screen sensing device 2 carry out signal feedback to checking module 4；
(4) checking module 4 compares the signal that checking module 4 is fed back with prefabricated reference signal, extracts error letter
Number correction instruction is formed, control camera lens servo mechanism 3 is rectified a deviation, until screen sensing device 2 receives four sides of laser beam
The position signal at angle, projected light beam is overlapped with four corners with screen sensing device 2 at this time, and the position adjustment of projection terminates；
(5) clarity adjusts, and lens focus is carried out to the adjustment of front and back, if the signal that screen sensing device 2 senses
Gradually enhancing, then camera lens servo mechanism 3 continues to adjust according to current adjustment direction, if what screen sensing device 2 sensed
Signal strength is gradually declining, then is adjusted according to opposite direction；Most start by force when the signal of screen sensing device 2 reaches
When now drop, illustrating to reach pinpointed focus state, projector 1 calculates intensity drop point to the location parameter of current point,
Camera lens servo mechanism 3 is reversely finely tuned again, reaches and most emphasizes entire signal, Focussing terminates.
As shown in Figure 1, drop shadow spread should be consistent with screen position when lens location is correct, cloth flooding；And it modulates
The signal beams b state of laser signal light beam a and square as shown in Fig. 2, two modulation laser signal light beam a are orthogonal,
One is horizontality, and one is plumbness, and two modulation laser signal light beam a are scanned while to opposite from screen
It carries out；When y=z=0 is arrived in scanning, light-beam transmitter 41 starts the signal beams b of transmitting square, two modulation laser signals
The side adjacent with two of signal beams b of square is overlapped light beam a respectively and travel speed is consistent, and the two arrives simultaneously in this way
Up to screen sensing device 2；When lens location is correct, modulation laser signal light beam a reaches signal quilt when screen sensing device 2
Record.
When lens location not clock synchronization, there are deviations for drop shadow spread and screen position, as shown in figure 3, drop shadow spread is not complete
Four screen sensing devices 2 are lived in all standing, and at this moment camera lens can release the signal beams b of the square of maximum magnitude, while camera lens
The Fast Activities for doing maximum magnitude show when the light beam that projector 1 is launched cannot all cover four screen sensing devices 2
Lens location and base position gap are too big, and checking module 4, which issues signal, makes alarm device 5 alarm, it is desirable that manual intervention is by people
Four screen sensing devices 2 can be completely covered in the square signal beams b of work coarse adjustment to maximum magnitude；In adjust automatically range
When inside there is view field's skew, as shown in figure 4, the signal beams b of modulation laser signal light beam a and square is no longer horizontal
State and plumbness receive modulation laser signal light when the two reaches screen sensing device 2 under inevitable and normal condition
The signaling point of beam a is different, according to the error amount between both, carries out error correction, camera lens servo mechanism 3 adjust lens location until
Lucky cloth flooding is projected, that is, reaches the state of Fig. 1 and Fig. 2.
As shown in figure 5, the working principle of the invention is specific as follows: screen sensing device 2 is placed on the four of view field
Angle can incude projection signal and be fed back.Realize screen sensing device 2 to drop shadow spread using laser adjustment beam modulation
Location aware, laser is a kind of optical frequency electromagnetic wave, has good coherence, using spatial digitalized FM encoding by information
Loading on laser becomes modulation laser signal light beam a, and spatial digitalized FM encoding is one kind of spatial intensity modulation coding, it
There is different light pulses using the different parts made in beam cross-section, and show as digitized signal.Light is adjusted in laser
In the cross section of beam projection (screen), with two mutually orthogonal shape of rectangular ribbon light beam mixed sweeps, when screen midpoint is arrived in scanning
Transmitting synchronizes the signal beams b of square, the signal beams that the edge of two modulation laser signal light beam a should respectively with square
Two outer side edges of b are overlapped, and modulate side when the speed of laser signal light beam a scanning expands with the signal beams b of square
Movement speed should be consistent, can guarantee in this way modulate laser signal light beam a and square signal beams b outer side edges simultaneously
Screen sensing device 2 is reached, and then is perceived and feeds back.
Be prefixed in checking module 4 lens location it is accurate when, screen sensing device 2 receive laser adjustment light beam number
Word signal, and if lens location is not right, it issues laser adjustment light beam and the signal beams b of square just also can be with phase
Same angular error projection is on the screen.In this case, when the signal beams b of laser adjustment light beam and square reaches screen sense
It is not that screen sensing device 2, but deflected condition at a certain angle are reached with state horizontally or vertically when answering device 2
Reach screen sensing device 2,2 digital signals received of such words screen sensing device are necessarily different, will be real
The digital signal and preset digital signal sequences that border receives are compared, this extraction error signal of base forms correction instruction.
It after camera lens servo mechanism 3 receives correction instruction, is acted, while the signal light of laser adjustment light beam and square
Beam b is still in continuous scanning transmitting, and until projected light beam is overlapped with four corners with sensor, position adjustment terminates.
Adjustment about focal length: controller 42 controls the adjustment that focal length is carried out front and back by camera lens servo mechanism 3, screen induction
The light signal that device 2 senses feeds back to controller 42, if 42 analyte signal intensity of controller is gradually enhancing, orders
Camera lens servo mechanism 3 continues to adjust according to current adjustment direction；If controller 42 receives what screen sensing device 2 sensed
Signal strength is gradually declining, then is adjusted according to opposite direction；When the signal that screen sensing device 2 receives reaches most strong
When starting to decline, illustrate to reach pinpointed focus state, controller 42 calculates intensity drop point to the position of current point
Parameter is set, then controls camera lens servo mechanism 3 and reversely finely tunes, reaches and most emphasizes entire signal, Focussing terminates.
About artificial coarse adjustment: projector 1 can launch the square signal beams of a maximum magnitude first, while camera lens is done most
Large-scale Fast Activities, can feedback signal after screen sensing device 2 is capped；When four equal feedback letters of screen sensing device 2
Number when, projector 1 enter adjust automatically state；When the light beam that projector 1 is launched cannot all cover four screen sensing devices 2
When, show that lens location and base position gap are too big, checking module 4, which issues signal, makes alarm device 5 alarm, it is desirable that artificial dry
Projector lens, which are adjusted to maximum magnitude, in advance can cover four screen sensing devices 2.
The beneficial effects of the present invention are: by software and hardware combine in the way of, the automatically projection to screen is determined
Equipment is proofreaded, and check and correction effect is more preferable, avoids the problem for manually adjusting the check and correction effect difference being likely to occur.
To camera lens servo mechanism, has mature technology in the prior art and exist, including the motor below camera lens, horse is arranged in
Up to camera lens rotation is driven, also need to include that other component exists certainly, because not being the innovative point of the innovation and creation, therefore herein not
It repeats again.
The above described is only a preferred embodiment of the present invention, being not that the invention has other forms of limitations.Appoint
What those skilled in the art changed or be modified as possibly also with the technology contents of the disclosure above equivalent variations etc.
Imitate embodiment.But without departing from the technical solutions of the present invention, according to the present invention construction and working principle are to the above reality
Any simple modification, equivalent variations and remodeling made by example are applied, the protection scope of technical solution of the present invention is still fallen within.
Claims (5)
1. a kind of for determining the device of screen prjection automatic Proofreading, including projector, it is characterised in that: further include screen induction dress
It sets, the quadrangle of screen display location is arranged in the screen sensing device；Camera lens servo mechanism, institute are additionally provided in projector
It states camera lens servo mechanism and the movement that projector lens carry out 360 degree is connect and can control with projector lens；It is pre- in projector
Checking module, the checking module and the electrical connection of camera lens servo mechanism are filled, the screen sensing device feedback signal gives check and correction mould
Block；The checking module includes light-beam transmitter and controller, and the light-beam transmitter follows projector lens mobile, controller
Screen sensing device signal is received after processing compares, camera lens servo mechanism is issued and is instructed；The light-beam transmitter can be sent out
Penetrate the signal beams b of mutually perpendicular modulation laser signal light beam a and square；The modulation laser signal light beam first passes through in advance
Spatial digitalized FM encoding, and be constantly scanned along direction vertical with itself, the signal light of the square
Beam b is slowly amplified to cloth flooding from as low as big.
2. according to claim 1 a kind of for determining the device of screen prjection automatic Proofreading, it is characterised in that: the screen
Sensing device uses light sensor.
3. according to claim 1 or 2 a kind of for determining the device of screen prjection automatic Proofreading, it is characterised in that: described
Screen sensing device carries out real data relation with checking module by way of cable, network or bluetooth.
4. according to claim 3 a kind of for determining the device of screen prjection automatic Proofreading, it is characterised in that: the check and correction
Module is also connected with alarm device.
5. a kind of for determining the method for screen prjection automatic Proofreading, comprising the following steps:
(1) projector is opened, into adjustment state, projector launches the square signal beams of a maximum magnitude, while camera lens
The Fast Activities of maximum magnitude are done, screen sensing device is capped feedback signal；
(2) when the equal feedback signal of four screen sensing devices, projector enters adjust automatically state；When the light that projector is launched
When Shu Buneng all covers four screen sensing devices, checking module, which issues signal, makes alarm device alarm, it is desirable that manual intervention,
Artificial coarse adjustment is carried out, until after four screen sensing devices can all receive beam signal, into adjust automatically state；
(3) light-beam transmitter can emit the signal beams b of mutually perpendicular modulation laser signal light beam a and square；It is described
Modulation laser signal light beam is constantly scanned, and it is all over the screen that the signal beams b of the square is as low as slowly amplified to cloth greatly certainly
Curtain；When the signal beams b of square covers some screen sensing device, modulation laser signal light beam scanning to screen sense
Device is answered, screen sensing device carries out signal feedback to checking module；
(4) checking module compares the signal that screen sensing device is fed back with prefabricated reference signal, extracts error signal
Form correction instruction, camera lens servo mechanism correction, until screen sensing device receives four corners of laser signal light beam
Position signal, the four of projected light beam corner is overlapped with screen sensing device at this time, and the position adjustment of projection terminates；
(5) clarity adjusts, and the controller control camera lens servo mechanism focusing in checking module carries out the adjustment of front and back, screen
The light signal that sensing device senses feeds back to controller, if controller analyte signal intensity is gradually enhancing, orders
Camera lens servo mechanism continues to adjust according to current adjustment direction；If controller receives the signal that screen sensing device senses
Intensity is gradually declining, then is adjusted according to opposite direction；When the signal that screen sensing device receives reaches most strong beginning
When decline, illustrating to reach pinpointed focus state, controller calculates intensity drop point to the location parameter of current point,
Camera lens servo mechanism is controlled again reversely to finely tune, reaches and most emphasizes entire signal, and Focussing terminates.
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| US10349025B2 (en) * | 2017-07-27 | 2019-07-09 | Seiko Epson Corporation | Projector and method of controlling projector |
| CN107911676B (en) * | 2017-11-28 | 2020-03-27 | 海信集团有限公司 | Focal length adjusting method and device for projection equipment |
| CN117572028B (en) * | 2024-01-19 | 2024-04-30 | 合肥综合性国家科学中心能源研究院(安徽省能源实验室) | Adjustment method of terahertz near-field system laser light path |
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| CN104660946A (en) * | 2013-11-20 | 2015-05-27 | 精工爱普生株式会社 | Projector, and method of controlling projector |
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| EP0703714A3 (en) * | 1994-09-20 | 1997-09-03 | Matsushita Electric Ind Co Ltd | Image display position detecting apparatus and image correction apparatus |
| KR100672584B1 (en) * | 2005-02-07 | 2007-01-24 | 엘지전자 주식회사 | Method for displaying video in auto-convergence |
| JP5069038B2 (en) * | 2007-04-20 | 2012-11-07 | 三菱電機株式会社 | Rear projection display |
| CN101281289A (en) * | 2007-12-29 | 2008-10-08 | 青岛海信电器股份有限公司 | Automatic focusing method |
| CN102591121A (en) * | 2012-02-21 | 2012-07-18 | 苏州佳世达光电有限公司 | Automatic focusing method of projector and projection system using automatic focusing method |
| CN105573041A (en) * | 2014-10-09 | 2016-05-11 | 中兴通讯股份有限公司 | Method and device for realizing automatic focusing of projector, and projector |
| CN105892199A (en) * | 2014-12-17 | 2016-08-24 | 广东新锦光电科技有限公司 | Laser projector |
| CN106527029A (en) * | 2016-12-30 | 2017-03-22 | 明基电通有限公司 | Automatic installation and adjustment system for projector |
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| CN104660946A (en) * | 2013-11-20 | 2015-05-27 | 精工爱普生株式会社 | Projector, and method of controlling projector |
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