CN110032036A - A kind of variable curvature Qu Ping based on projector - Google Patents
A kind of variable curvature Qu Ping based on projector Download PDFInfo
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- CN110032036A CN110032036A CN201910172736.XA CN201910172736A CN110032036A CN 110032036 A CN110032036 A CN 110032036A CN 201910172736 A CN201910172736 A CN 201910172736A CN 110032036 A CN110032036 A CN 110032036A
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- screen
- projector
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- variable curvature
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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
- G03B21/54—Accessories
- G03B21/56—Projection screens
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- Transforming Electric Information Into Light Information (AREA)
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Abstract
The present invention provides a kind of projection screens with alterable curvature for a kind of a kind of variable curvature song screen abstract based on projector of variable curvature song screen denomination of invention based on projector, projection screen is allowed to carry out a degree of bending by mechanical structure, it can be adjusted according to practical drop shadow effect, make the projection screen arbitrary surface shape to be formed.When one or two people carry out viewing or use projector, bent screen cloth can make the visual angle of observer more three-dimensional and wide, if multiple people carry out using when, then bent screen can bring uncomfortable experience sense to the observation person of bent screen two side areas, visual angle will appear deviation, and therefore, a kind of screen of alterable curvature provided by the invention can be controlled according to user's actual conditions, can be at plane screen, the Qu Ping that can also be angled.
Description
Technical field
The invention belongs to projector and its display screen technology field, in particular to a kind of variable curvature based on projector
Qu Ping.
Background technique
Most of projection screens need to use in more dark environment at present, could obtain good drop shadow effect.
But with the promotion of the development of economic society and living standards of the people, more and more people need one kind can in natural light or
It still can achieve the projection screen of preferred view effect under bright light environments.
On the other hand, projection screen mainly has a these types of form in the market: first, supporting part is divided into and positive throws supporting part and back
Throw supporting part.Most of positive throwing supporting parts are white, and rear-projection supporting part is grey.Its material is one piece of special imaging PVC for having thickness,
Three-dimensional sense is very rich, and image quality is penetrating；Second, glass curtain, base fabric made of fabric is woven as glass thread, surface layer is coated with special throwing
The PVC material of shadow effect.Due to there is the support of glass base fabric, so being not required to even up, stretching, extension will be straight naturally；Third, it is woven
White plastic curtain, base fabric made of being woven as braided wire, surface layer are coated with the PVC material of special projection effect.Be widely used in commercial affairs and
Teaching category, curtain can go up and down carry out plane projection, and curtain can be rolled and sagging function by motor control；The
Four, glass bead screen is woven into cloth bottom by braided wire, and surface is coated with the broken pearl of glass, is mainly used for increasing brightness, and contrast, view
Angle is not good enough, and image quality is poor compared with other curtains.It is more for place of becoming clear.Since present quotient teaches projection device to have enough lumen of light
Line, therefore fewer and fewer people uses glass bead screen；5th, liquid crystal display and LED screen are mainly used for touching projection and plate
Projection.
Since curved surface projection shows that, with following benefit, that is also applied is more and more extensive:
Human visual is more comfortable；2, more life-like picture telepresenc is brought；3, viewing visual angle is wider；4, curved-surface structure can be
Bigger display area is obtained in the confined space.Similarly, if projection screen be curved surface, also will obtain relative to conventional planar curtain and
Say apparent advantage;These above-mentioned projection screens or projection screen form single are fixed, once select it is a certain if can only be into
Row plane projection or curved surface projection cannot project actual effect according to user and be adjusted and changed in time.
Summary of the invention
Vision is projected without selectivity, under bright light environments to environment light there are conventional projection screen for the prior art to imitate
Fruit is poor, the lesser problem in horizontal view angle, and product of the present invention projection screen uses poly (methyl methacrylate) plate material, projects in poly (methyl methacrylate) plate
One layer of face paste special line holographic projections film, can solve the undesirable problem of drop shadow effect under bright source, and emphasis of the present invention mentions
For a kind of projection screen with variable curvature.
To achieve the goals above, the technical solution adopted by the present invention are as follows:
A kind of projection screen with variable curvature, material are the poly (methyl methacrylate) plate or PC plate with a thickness of 0.5-2mm, this
Two kinds of materials all have relatively good toughness and intensity, can carry out bending and recovery repeatedly, as preferred side of the invention
The ratio of case, the variable curvature screen width and radius of curvature is 0 .3-3 .5, i.e. the bending tangent line and metope at screen both ends
Vertical angle is within 15 °.
After apparatus of the present invention are as shown in Figure 1, projector position is fixed, curtain can also be carried out curved with plane projection
Bent Curved screen projection.Shown in Fig. 2, projected in plane and curved surface, the shape that figure can be presented be it is different, when one piece of plane
When curtain becomes curved surface curtain, play subsequent corrosion and screen wide cut, and bent screen both ends displacement relation carry out it is as follows
Explanation.
As shown 3, the flat Plexiglass plate for being L0 to a certain wide cut, after its bending, if bent screen radius is R, at this time
The displacement at song screen both ends is h, and it is β that song, which shields corresponding radian, then has.
By (1) as long as formula is it is found that the given bent displacement for shielding both sides, is bent, so that it may know song by electric expansion cylinder
The value of rate radius R.
When user is when carrying out plane projection image, image is rectangle, if carrying out viewing now with multiple people, then
Corresponding graphic change can occur for image, as shown in Figure 1, we carry out model analysis to entire projection link, establish 0-xyz seat
Mark system, first analyzes the horizontal direction x, y, as shown in figure 4, set projector position as O point, the bent center of circle of shielding in O ' point,
It is β that song, which shields corresponding radian, and AB is curtain, and arc AB is AB screen after bending.K point is any one in image on plane projection screen
Point, coordinate are (x0, y0, z0), and distance of the projector O point apart from curtain is L, and k point coordinate is (x0, L, z0), after screen-bending,
Image at k point then extends to Q point, and coordinate is (x1, y1, z1), in the example shown, our available relationships:
In addition,Straight line OQ slope is that then straight line OQ and circle O equation group intersection are then Q point coordinate:
It solves:
；
Face in the vertical direction, image can also shift, therefore, as shown in figure 5, we establish in its vertical direction plane
Model is analyzed, and for the k point in horizontal model, we are transformed into its side view, in diagram k point coordinate be (x0,
L, z0), Q point coordinate is (x1, y1, z1), according to the available following relationship of triangle relation:
With this, if k point is to Q point x, y, z axis direction regulated quantity are as follows:
After the position of projector and curtain is determined, then the value of L determines, when image projection is on curtain, according to image
Shape, bent screen radius R is adjusted in the extension elongation of our adjustable 4 electric expansion cylinders, can according to (1)-(5) formula
To know, as long as adjustingAmount, can be completed the correction of image.
In conclusion to realize the analysis based on theoretical model based on the above-mentioned bent screen projection for carrying out alterable curvature, I
Can find relationship between each parameter of curved surface, therefore, the adjusting of parameter each for variable curvature screen, the present invention is using such as
Lower solution carries out specific adjustment quantization bending to screen:
A kind of variable curvature Qu Ping based on projector provided by the invention, feature include variable curvature song screen machinery tune
Whole structure, electric control system, Control System for Projector, projector operation display screen.
According to above scheme described in variable curvature song screen machinery adjustment structure, feature include the present invention one kind is provided
Entire screen is arranged to Qu Ping, and the curvature with indent, can not only expanded by the projection screen device with variable curvature
The horizontal view angle of entire screen, and the contrast of entire screen can be improved, obtain better viewing experience.As shown in fig. 6, will
The middle section of curtain is fixed on to fix among 10- by poly (methyl methacrylate) plate or PC plate curtain vacuum suction or sealant to be filled
Set, No. 1-4 4 electric expansion cylinders then be housed in four corners of the hanging plate of 6- suspension arrangement, by adhesive tape and support rod with
Curtain is attached, also with sealing glue connection between adhesive tape and curtain；Each electric expansion cylinder can to 4 angles of curtain respectively into
Row adjustment, as shown in fig. 7, when various deformation are presented in the image of projection school can be carried out by adjusting each electric expansion cylinder
Just.For curtain when any one direction crimps, projector can carry out corresponding Image Adjusting according to Curvature varying.It uses
Person can control operation panel by 12- electric expansion cylinder, to each electric expansion cylinder in curtain device on operation panel
The operation and setting being displaced, 4 electric expansion cylinders can be divided into two groups of left and right, and two, every side electric expansion cylinder can carry out
Synchronously control mode can also be independently controlled respectively with 4 electric expansion cylinders.
According to above scheme described in electric control system, feature includes to control above-mentioned variable curvature song screen machinery tune
The electronic components such as the IO lines of 4 electric expansion cylinders of whole structure, pickup wire, power supply line, sensor.
According to above scheme described in Control System for Projector, feature include projector internal signal receiving module, letter
Number processing module, signal calculate and feedback module, the electric potential signal and sensor for receiving above-mentioned electric control system are real-time
The parameter of transmission, and regulating calculation is carried out, and by the adjusting of calculating or correcting value parameter, feedback arrives above-mentioned electrical control division
Point, and then the execution part of the mechanical structure to bent screen structure, electric expansion cylinder shields song and carries out closed-loop control, it is real
Shi Jiaozheng drop shadow effect.
According to above scheme described in projector operation display screen, feature include above-mentioned electric control system respectively execute machine
The parameter of structure and sensor shows that Control System for Projector is shown to the correction parameter feedback information of Qu Ping and user is to song
The screen operator when execution part of the mechanical structure of screen structure is manually controlled.
Further, user can by 12- electric expansion cylinder control operation panel on can choose bilateral mode or
Person's stand-alone mode, i.e. two electric expansion cylinders are not adjusted synchronously bilateral mode as one group, can be primary right under stand-alone mode
Four azimuths carry out independent operation, and displacement sensor, input bit on projector interface are housed in electric expansion cylinder regulating device
When shifting value is adjusted, displacement sensor automatic detection screen both ends telescopic location, electric expansion cylinder adjust after after touch
Screen progress is self-locking, prevents viewing process from accidentally touching.
The present invention is provided in a kind of projection screen device with variable curvature, for each electric expansion cylinder, is limited
Position setting, when preventing sensor or adjusting failure, electric expansion cylinder is ceaselessly adjusted.Apparatus of the present invention are set by whole
Meter, can make all devices be sealed in enclosure interior, and then single unit system can be fixed by modes such as suspensions, letter
It is single beautiful.
Detailed description of the invention
The present invention is done with reference to the accompanying drawings and detailed description and is further illustrated, of the invention is above-mentioned
And/or otherwise advantage will become apparent.
Fig. 1 is optical projection system model of place schematic diagram of the present invention.
Fig. 2 is projecting apparatus system projection display screen schematic shapes.
Fig. 3 is projection display screen mathematical model schematic diagram after bending.
Fig. 4 is the corrected mathematical model schematic diagram of horizontal direction after projection display screen bending.
Fig. 5 is the corrected mathematical model schematic diagram of vertical direction after projection display screen bending.
Fig. 6 is the alterable curvature screen of the present invention and projector overall model schematic diagram.
Fig. 7 is the model schematic that projector carries out the various projected image deformations that will appear in projection process.
Fig. 8 is the mechanical structure model schematic of the alterable curvature screen bending part of the present invention.
Fig. 9 is a kind of curve form model schematic of alterable curvature screen bending part of the embodiment of the present invention.
Figure 10 is the curve form model schematic of two kinds of alterable curvature screen bending parts of the embodiment of the present invention.
In diagram: 1-1 electric expansion cylinder, 2-2 electric expansion cylinder, 3-3 electric expansion cylinder, 4-4 electric expansion
Cylinder, 5- curved surface curtain, 6- suspension arrangement, 7- displacement sensor, 8- shell, hanging plate, 9- projector, 10- intermediate retainer,
11- electric expansion cylinder limiting device, 12- electric expansion cylinder control operation panel, 21, the free guide end of 22-, 23- electric expansion
Cylinder, 31,33- electric expansion cylinder, the free guide end of 32-, 34- bindiny mechanism.
Specific embodiment
Below in conjunction with this system composition schematic diagram and specific embodiment, technical solution in the embodiment of the present invention is carried out
Clearly and completely describe.Obviously, the described embodiment is only a part of the embodiment of the present invention, instead of all the embodiments.
The embodiment of variable curvature Qu Ping based on projector, a kind of variable curvature Qu Ping based on projector provided by the invention
It is equally applicable to other groups and object, shall fall within the protection scope of the present invention.
Embodiment one:
A kind of variable curvature Qu Ping based on projector, is mainly characterized by for projection screen being fixed on a kind of mechanical structure
On, include telescopic device in mechanical structure, projection screen can be carried out to multi-faceted different degrees of protrusion or indent, from
The curvature of Qu Ping is controlled.Telescopic device can carry out movement control by artificial autonomous operation or other modes detection
The form of system.
Specifically, the electric-controlled when projected image shows that the trapezoidal deformation of step 110 occurs in graphic result, in above scheme
The photosensitive sensor that system part is contained can monitor the deformation on projection screen, and step 7 displacement sensor can detecte
To specific deflection, it should be noted that projector apparatus of the invention needs to carry out Initialize installation, i.e. base when in use
Certainly position, after initialization, each sensor determines that the displacement of four corners is zero on the basis of open screen to system.
Further, after above-mentioned projecting figure becomes trapezoidal, 3, No. 4 position sensors of step 111 can detecte figure
The displacement at opposite following two angle is [a1], preferential, this displacement is that [a1] is transmitted to projector by electric control system
Control system carries out the parameter correction of above-mentioned mathematical model, calculates the correction parameter [b1] for needing to revert to test pattern, and
Correction parameter [b1] is fed back to the electric control system of above-mentioned Qu Ping.
Further, the electric control system of Qu Ping senses correction parameter [b1] by the IO of step 23 electric expansion cylinder
Device line is sent to the PLC module of the 3 of step 111, No. 4 electric expansion cylinders, so that the 3 of step 23, No. 4 electric expansion cylinders are walked
Rapid 112 expanding-contracting action, stroke are correction parameter [b1].
Further, 3, No. 4 electric expansion cylinders of above-mentioned steps 23 are while carrying out parameter correction, and 3, the 4 of step 111
The displacement sensor of number position step 7 monitors the screen displacement amount of two positions in real time, feeds back, and adjusts etc. circulation
Movement, reaches entire regulating system closed-loop control, can enable variable curvature song screen step according to the actual situation in this way
112 real-time adjustment curvature.
Embodiment two:
According to above-described embodiment one, variable curvature song screen of the present invention can adjust curvature in real time according to the actual situation, and
Closed-loop control is carried out, doing invention also includes another control model: being manually adjusted, the control of above-mentioned closed loop mode and degree of regulation
Precision by sensor and adjustment actuating mechanism is influenced, therefore manually controls mould comprising user in the adjusting of final effect
Formula.
Specifically, the displacement that step 7 displacement sensor of the 3 of above-mentioned steps 111, No. 4 positions feeds back two angles is
When [a1], which can show on above-mentioned projector operation display screen that user can be in the operation interface of the display
Carry out displacement is manually entered adjusting.
Further, user input displacement amount [c1] in operation interface, then the electric control system of Qu Ping joins correction
Number [c1] is sent to the PLC module of the 3 of step 23, No. 4 electric expansion cylinders by the IO pickup wire of electric expansion cylinder, so that step
Rapid 23 3, No. 4 electric expansion cylinders carry out expanding-contracting action, and stroke is correction parameter [c1].
Further, the regulating effect for the correction parameter that user can input in operation interface according to above-mentioned first time,
Duplicate input many kinds of parameters is further adjusted, until achieving the effect that user wants.
Embodiment three:
According to embodiment one, controls bent screen and carries out the device of Curvature varying as shown in figure 8, can be 4 electric expansion cylinders,
It is also possible to two, three or 4 or more electric expansion cylinders to be controlled, position can be carried out according to user's actual conditions
Arrangement, as shown in figure 9, can be free guide end by the bent screen both ends of step 22, the electric expansion cylinder among step 23 is to adjust
End.
Example IV:
According to embodiment one, as shown in Figure 10, a kind of variable curvature Qu Ping based on projector be can be in step 32
Between the free guide end in part, it is adjustable side that the bent screen both ends of step 31, which are electric expansion cylinder, then 7 displacement sensor of above-mentioned steps transmission
Displacement [a1] adjustment process of above-described embodiment is then carried out by two electric expansion cylinders of step 31.
According to embodiment one, controls bent screen and carry out in the device of Curvature varying, executive component is also possible to other shapes
The servo motor of formula drives the control of screw rod isotype, or carries out minitype cylinder in the case where certain conditions permits and controlled
System executes the component present invention and only lists limited embodiment, it is clear that the embodiment being not all of, it can be according to the present invention
Purpose choose more multifarious executing agency.
In conclusion all carry out bending deformation to plane projection screen by any executive component and mechanism, and make
Screen carries out the device of Curvature varying not having to situation, and this device can carry out independently according to the actual conditions of user
It manually controls or Curvature varying is adjusted in telecreen control executive component, belong to the scope of protection of the invention.
Claims (8)
1. a kind of variable curvature Qu Ping based on projector, which is characterized in that including a kind of figure school based on mathematical model
Positive system, a kind of variable curvature Qu Ping based on projector；
Variable curvature Qu Ping based on projector, feature include variable curvature song screen machinery adjustment structure, electrical control
Partially, Control System for Projector, projector operation display screen.
2. a kind of figure adjustment system based on mathematical model according to the claims 1, it is characterised in that realize base
Sensor, actuator, bent screen curvature, regulated quantity in the bent screen projection of alterable curvature, we can find these each parameters
Between linear relationship.
3. feature includes that the present invention provides one according to variable curvature song screen machinery adjustment structure described in the claims 1
Kind has the projection screen device of variable curvature, and entire screen is arranged to Qu Ping, and the variable curvature with indent.
4. feature includes to control above-mentioned variable curvature song screen machinery according to electric control system described in the claims 1
The electronic components such as the IO line of adjustment actuating mechanism of each position of structure, pickup wire, power supply line, sensor are adjusted,
The figure deformation amount of each position of projection screen can be accurately grabbed, the correction parameter also comprising high-ranking officers' positive system feedback is fed back to
The control units such as the PLC of executive component enable executive component accurately to control song screen.
5. the Control System for Projector according to the claims 3, feature includes that projector internal signal receives mould
Block, signal processing module, signal calculates and feedback module, for receiving the electric potential signal of above-mentioned electric control system, and sensing
The parameter of device real-time Transmission, and regulating calculation is carried out, and by the adjusting of calculating or correcting value parameter, feedback arrives above-mentioned electric-controlled
Part processed, and then the execution part of the mechanical structure to bent screen structure, enable electric expansion cylinder to shield song and carry out closed loop control
System, real time correction drop shadow effect.
6. according to projector operation display screen described in the claims 1, it is characterized in that projector apparatus of the invention is with electricity
Hold display operation ticket, the parameter of each executing agency of above-mentioned electric control system and sensor shows that Control System for Projector is to song
The correction parameter feedback information of screen can show screen display in projector engine, and user is allowed to tie bent the mechanical of screen structure
The screen operator that the execution part of structure can be manually controlled on a display screen.
7. the device that according to claim 2, the bent screen of control carries out Curvature varying can be 4 actuators, it is also possible to two
The actuator of a, three or 4 or more are controlled, and position can be arranged according to user's actual conditions, can will be bent
Screen both ends are free guide end, and intermediate electric expansion cylinder is adjustable side.
8. as claimed in claim 7, a kind of variable curvature Qu Ping based on projector can be bent screen middle section and freely lead
Xiang Duan, it is adjustable side that song screen both ends, which are electric expansion cylinder, then the displacement of displacement sensor transmission then passes through Liang Ge executing agency
Process is adjusted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910172736.XA CN110032036A (en) | 2019-03-07 | 2019-03-07 | A kind of variable curvature Qu Ping based on projector |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910172736.XA CN110032036A (en) | 2019-03-07 | 2019-03-07 | A kind of variable curvature Qu Ping based on projector |
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| Publication Number | Publication Date |
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| CN110032036A true CN110032036A (en) | 2019-07-19 |
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| CN201910172736.XA Pending CN110032036A (en) | 2019-03-07 | 2019-03-07 | A kind of variable curvature Qu Ping based on projector |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022218390A1 (en) * | 2021-04-14 | 2022-10-20 | 深圳海翼智新科技有限公司 | Projection device, projection lens assembly and projection system |
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2019
- 2019-03-07 CN CN201910172736.XA patent/CN110032036A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022218390A1 (en) * | 2021-04-14 | 2022-10-20 | 深圳海翼智新科技有限公司 | Projection device, projection lens assembly and projection system |
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20190719 |
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| WD01 | Invention patent application deemed withdrawn after publication |