CN103995351B - A kind of photoscanning display and interactive device - Google Patents
A kind of photoscanning display and interactive device Download PDFInfo
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- CN103995351B CN103995351B CN201410098140.7A CN201410098140A CN103995351B CN 103995351 B CN103995351 B CN 103995351B CN 201410098140 A CN201410098140 A CN 201410098140A CN 103995351 B CN103995351 B CN 103995351B
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Abstract
A kind of photoscanning display interactive device of the present invention, belongs to optical information display and mutual technical field.Structure has light source (1) and Wollaston spectral module, the micro-translation generation module of light, short focal length lens (4) and receiving screen (5).Wollaston spectral module is made up of Wollaston prism (21), quarter wave plate (22) and photoreceptor (23), to be separated with the light path of the light be reflected back for making emergent light and to read reflected light information, light micro-translation generation module can make light produce small translation, short focal length lens (4) produces drift angle for making light, finally at the upper hot spot formed with control signal scanning of receiving screen (5), realize image display.The present invention not only overcomes the low precision of optical mechaical scanning, stability is difficult to the problems such as control and additionally provides the hardware foundation realizing interactive function, when using it for display manufacturing, touch screen is mutual or Fescue pen is mutual function and paper document scan function can be made it have.
Description
Technical field
The invention belongs to optical information display and mutual technical field, especially relate to a kind of for scan display and can be mutual device.
Background technology
Laser television utilizes All-Solid working-laser material, produces the light source of continuous laser as color laser TV of red, green, blue three kinds of wavelength, by television signal control tricolor laser scan image.Its color domain coverage ratio in theory can up to more than 90% of human eye gamut range.This 62% color domain coverage ratio higher than current LED television turn improves a class.Moreover, laser television also has plurality of advantages as realized rotary screen, 3D effect, but the deflection of its gordian technique plane scan is still difficult problem, so slowly fail commercialization.Current beam deflection scanning technique mainly contains mechanical scanning mode, electropical scanning mode and acousto-optic scanning mode.Electropical scanning is that electrooptical effect is to change the direction of propagation of light beam in space; Acousto-optic scanning is exactly made acousto-optic crsytal change the diffraction direction of laser and then reach the object of laser deflection scanning by change sound wave frequency.They can obtain very high frequency of operation, but scan deflection angle is less, and light loss is comparatively large, and work efficiency is very low, is difficult to the needs meeting giant-screen.In three kinds of scan modes, mechanical scanning technology is the most ripe, and common mechanical scanning system is made up of tilting mirror and galvanometer, and scanning angle is large, and temperature influence is little, the light wave that is applicable to all kinds of wavelength.Current two-dimensional laser scanning system mainly adopts mechanical scanning form, realizes beam level scanning with polygonal-mirror, realizes beam orthogonal scanning with plane galvanometer.Mechanical scanning system due to row and column scanning be all by driven by motor, in order to ensure the positional precision scanned, high to the synchronous and stability requirement of motor scanning.But, mechanical scanning speed is low, be difficult to the scanning requirement meeting high-definition television in the future, complex structure, when frequency of operation is very high, drive the High-speed Electric chance of tilting mirror and galvanometer to drive surrounding air rotate and produce noise, and the price of high-speed electric expreess locomotive also costly, moreover, life problems etc. are all be difficult at present put practical reason on market.
In addition, traditional mentality of designing, only just in order to show, does not consider that future customer is to the mutual demand waiting other functions.
Summary of the invention
The technical problem to be solved in the present invention is: overcome the deficiencies in the prior art, provides a kind of and may be used for photoscanning display and have the optical devices of interaction capabilities.
Above-mentioned technical matters is realized by following technical scheme:
A kind of photoscanning display and interactive device, its structure has: the light source 1 and the receiving screen 5 that provide the thin parallel beam of linear polarization; It is characterized in that: Wollaston spectral module, the micro-translation module of light and the short focal length lens 4 placed successively along light path in addition between light source 1 and receiving screen 5; Described Wollaston spectral module, is made up of Wollaston prism 21, quarter wave plate 22 and photoreceptor 23; The micro-translation module of described light, that two the mirror units 32 driven respectively by two control device 31 are formed, two planes that the normal of two mirror units 32 and light path are determined are orthogonal, and mirror unit 32 carries out motion in one dimension along light place straight line under the acting force of control device 31; Described short focal length lens 4 is focal length convex lens in millimeter magnitude.
At the control device 31 described in the micro-translation module of light, be that the control signal added by a basis is with index glass unit 32, thus change the device of mirror unit 32 positions.It can be the structure that the following two kinds is concrete.
1. control device 31 is made up of collapsible base, and collapsible base can be electrostriction material, and the electric signal of change is added on electrostriction material, and mirror unit 32 is fixed in collapsible base.Change the length of substrate by changing the electric signal be applied in collapsible base, thus change the position (making 32 translations of mirror unit) of mirror unit 32.
2. control device 31 can be a structure clipping one deck resilient material between electromagnet and armature plate, and the electric signal of change is added on magnet coil, and mirror unit 32 is fixed on armature plate.The electric current being changed electromagnet by electric signal just can change the gravitation of electromagnet to armature plate, thus realizes the control (making 32 translations of mirror unit) to mirror unit 32 positions.
Described mirror unit 32 is length of sides is the square-shaped planar catoptron of 1um ~ 1dm.Preferred 1mm ~ 1cm.
Described photoreceptor 23 can be photodiode, CCD photosensitive unit, photoelectric tube.
An application for photoscanning display and interactive device, shows for color laser TV; Described light source 1 needs, with three light sources, to provide three primary colours thin parallel beam respectively; Electric signal added on described control device 31 is TV signal.
" a kind of photoscanning display and interactive device " of the present invention has following beneficial effect:
The clear superiority contrasted with traditional approach:
1, cost is low, and the element that the present invention adopts is all the element being easy to obtain, so cost can be lower, be conducive to large-scale commercial applications and produce.
2, energy consumption is low, and the present invention does not need direct current generator to drive scanister, but adopts the mode such as electromagnetic force, electrostatic force to drive by a small margin, so energy consumption is relatively much lower.
3, high, the good stability of precision, the present invention can make light and electric signal set up one-to-one relationship, so the positioning precision of light is very high.
4, conveniently realize man-machine interaction, and display screen can be made to have scan function.
5, compared with relevant application for a patent for invention, the present invention also has obvious advantage:
Such as, the large eccentricity ellipsoidal reflector that relevant application for a patent for invention uses does not have ready-made product, and the non-spherical surface of ellipsoidal reflector is difficult to grind, grind precision to be difficult to ensure, so make more difficult, corresponding cost also can be higher, and the short focal length lens used in the present invention is applied very universal in existing electronic product, so be easy to obtain, cost can be much lower;
Such as, in relevant application for a patent for invention, micro-drift angle generation module and ellipsoidal reflector need optics confocal, slightly deviation (deviation of micron number magnitude does not allow) just can not realize display, even if strictly confocal when making, in use be subject to extraneous vibration be also easy to destroy confocal, compare, there is no confocal arrangement in the present invention so there will not be above-mentioned situation;
Such as, compared with micro-drift angle generation module in relevant application for a patent for invention, the micro-translation module structure of light of the present invention is simpler, and productibility is stronger, more easily popularizes;
Such as, device in relevant application for a patent for invention is all brand-new design, do not occur simultaneously with prior art or product, so each device will make again, so front-end investment can be very large, commercialization threshold is high, and the device used in the present invention has off-the-shelf (having abundant product specification to choose from) or slightly makes improvements in prior art and just can obtain;
Such as, compare to relevant application for a patent for invention, the present invention's one-piece construction ensure that the institute of foregoing invention is advantageous while is more succinct, has obvious cost advantage;
Accompanying drawing illustrates:
Fig. 1 is a kind of one-piece construction schematic diagram of the present invention.
Fig. 2 is photoscanning displaying principle schematic diagram of the present invention.
Fig. 3 is the micro-translation module principle schematic of light of the present invention.
Embodiment
Below in conjunction with accompanying drawing, feature of the present invention and principle of work are further described.
Embodiment 1 photoscanning display and mutual embodiment
With reference to figure 1, can interacted light scanning display apparatus the Wollaston spectral module, the micro-translation module of light, short focal length lens 4 and the receiving screen 5 that comprise light source 1 and place successively along light path.Wherein light source 1 is the light source that can produce the thin parallel beam of linear polarization, Wollaston spectral module is made up of Wollaston prism 21, quarter wave plate 22 and photoreceptor 23, the thin parallel beam incident sent from light source 1 is to a side (side that o, e light separates) of Wollaston prism 21, from another side outgoing (now o, e light coincides together) of Wollaston prism 21 after superrefraction, after passing perpendicularly through quarter wave plate 22, arrive the micro-translation module of light.The micro-translation module of light by two cover can change position mirror unit 32 and control device 31 form, the plane that the normal of two mirror units 32 and light path are determined is orthogonal, the square-shaped planar catoptron of described mirror unit 32 can be a length of side be 1um ~ 1cm, motion in one dimension can be done along light path under the drive of control device 31 by mirror unit 32.
The structure of the micro-translation module of described light is shown in Fig. 3, this device is made up of collapsible base (i.e. control device 31) and catoptron (i.e. mirror unit 32), collapsible base can be electrostriction material, the length of substrate can be changed by changing the electric signal be applied in collapsible base, thus change the position of mirror unit 32.
Photoscanning displaying principle, see Fig. 2, is reflexed to short focal length lens 4 from the light of Wollaston prism 21 outgoing by the micro-translation module of light, is refracted to receiving screen 5 more afterwards by short focal length lens 4, and receiving screen 5 forms a hot spot.When the control signal on the control device being added in the micro-translation module of light makes intermittent scanning in certain limit, scan variations also can be made in certain limit in the position of mirror unit 32, and then the light that reflects of mirror unit 32 and mirror unit 32 do not offset the light that front-reflection goes out and can produce a small translation constantly changed, this small translation is amplified by short focal length lens 4, final emergent ray then can form picture in the enterprising line scanning of receiving screen 5, realizes the object of photoscanning display.
The principle of man-machine interaction is, when certain position of receiving screen 5 is touched, diffuse reflection can be there is in the light that this position receives due to the existence of touching object (such as pointing), therefore when former road turns back to the light of short focal length lens 4 and do not touch, reflected light information has significant difference, the micro-translation module of light is reflexed to again by short focal length lens 4, again quarter wave plate 22 can be passed by the light of the micro-translation module of light, light now after light source 1 sets out due to twice through quarter wave plate 22, its direction of vibration turns over 90 degree and (namely e occurs, o changes), again can not return light source 1 by light after Wollaston prism 21 but be received by photoreceptor 23.When photoreceptor 23 receives the light reflected from receiving screen 5, the position that receiving screen is touched and the control signal be added on the control device 31 of the micro-translation module of light are one-to-one relationship, control signal corresponding when therefore can receive light according to photoreceptor 23 judges the position touched, thus realizes human-computer interaction function.
The present invention is except the positional information directly reading receiving screen 5 and be touched entrained by light that back reflection returns, the luminous point information that Fescue pen projects on receiving screen 5 can also be read, now remove the quarter wave plate 22 in Wollaston spectral module, system also can work, in addition, paper document directly can also be attached on display screen (i.e. receiving screen 5) by scanning the information read on paper document.
The micro-translation module embodiment of embodiment 2 light
With reference to figure 3, the micro-translation module of light is made up of collapsible base and catoptron unit, produces translation when substrate is stretched between reflection ray meeting and former reflection ray.
The electrostriction material that the collapsible base of the micro-translation module of light provides except embodiment 1, can also adopt an electromagnet and armature plate to clip the structure of one deck resilient material, and mirror unit 32 is fixed together with armature plate.Just can change its gravitation to armature plate by changing the electric current of electromagnet like this, thus realize the control to first 32 positions of mirror.
Embodiment 3 Wollaston spectral module embodiment
O light and e light light path altogether on the left of Wollaston prism, two-beam road, right side separately, therefore the two beam tube optical line terminal one that right side separates can settle light source 1, another branch road can arrange photoreceptor 23, the effect of 1/4 slide 22 makes polarisation of light direction turn over 90 °, it should be noted that from the angle between the vibration plane and 1/4 slide 22 principal section of the light of light source 1 outgoing be 45 °.
Embodiment 4 is applied to the display of color laser TV
The present invention be used for color laser TV display time, light source 1 need with three light source 1(namely on Fig. 1 light source 1 part according to identical light path principle placement three primary light source), provide three primary colours thin parallel beam respectively.
Above content is in conjunction with concrete embodiment further description made for the present invention, can not assert that specific embodiment of the invention is confined to these explanations.For general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, some simple deduction or replace can also be made, all should be considered as belonging to protection scope of the present invention.
Claims (4)
1. photoscanning display and an interactive device, its structure has: the light source (1) and the receiving screen (5) that provide the thin parallel beam of linear polarization; It is characterized in that: Wollaston spectral module, the micro-translation module of light and the short focal length lens (4) placed successively along light path in addition between light source (1) and receiving screen (5); Described Wollaston spectral module, is made up of Wollaston prism (21), quarter wave plate (22) and photoreceptor (23); The micro-translation module of described light, that two the mirror units (32) driven respectively by two control device (31) are formed, two planes that the normal of two mirror units (32) and light path are determined are orthogonal, and mirror unit (32) carries out motion in one dimension along light place straight line under the acting force of control device (31); Described short focal length lens (4) is the convex lens of a focal length in millimeter magnitude.
2. photoscanning display according to claim 1 and interactive device, it is characterized in that, described control device (31), be made up of collapsible base, collapsible base is electrostriction material, the electric signal of change is added on electrostriction material, and mirror unit (32) is fixed in collapsible base.
3. photoscanning display according to claim 1 and interactive device, it is characterized in that, described control device (31), it is a structure clipping one deck resilient material between electromagnet and armature plate, the electric signal of change is added on magnet coil, and mirror unit (32) is fixed on armature plate.
4. the photoscanning display of claim 1 and an application for interactive device, show for color laser TV; Described light source (1) needs, with three light sources, to provide three primary colours thin parallel beam respectively; The upper added electric signal of described control device (31) is TV signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410098140.7A CN103995351B (en) | 2014-03-15 | 2014-03-15 | A kind of photoscanning display and interactive device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410098140.7A CN103995351B (en) | 2014-03-15 | 2014-03-15 | A kind of photoscanning display and interactive device |
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| Publication Number | Publication Date |
|---|---|
| CN103995351A CN103995351A (en) | 2014-08-20 |
| CN103995351B true CN103995351B (en) | 2016-02-24 |
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| CN201410098140.7A Expired - Fee Related CN103995351B (en) | 2014-03-15 | 2014-03-15 | A kind of photoscanning display and interactive device |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105467609B (en) * | 2016-01-15 | 2017-12-15 | 南开大学 | A kind of the reference light beam-splitting method and its special purpose device of the spatially angular multiplexing holography based on Wollaston prism |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07333544A (en) * | 1994-06-07 | 1995-12-22 | Dainippon Screen Mfg Co Ltd | Optical deflector |
| US20090051995A1 (en) * | 2006-06-01 | 2009-02-26 | Mark Shechterman | Linear Optical Scanner |
| CN101382654B (en) * | 2008-09-23 | 2010-06-09 | 北京理工大学 | Light beam rotary apparatus and method capable of compensating intensity variation caused by polarization |
| CN101915542B (en) * | 2010-08-05 | 2011-11-02 | 哈尔滨工业大学 | Biaxial MEMS reflective galvanometer and F-Theta lens-based linear scanning system used for laser heterodyne interferometer |
| CN103631015B (en) * | 2013-12-06 | 2015-09-23 | 吉林大学 | A kind of high-speed light scanning display and reading device |
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