CN105120188A - Laser scanner and laser display system - Google Patents
Laser scanner and laser display system Download PDFInfo
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- CN105120188A CN105120188A CN201510645977.3A CN201510645977A CN105120188A CN 105120188 A CN105120188 A CN 105120188A CN 201510645977 A CN201510645977 A CN 201510645977A CN 105120188 A CN105120188 A CN 105120188A
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Abstract
The invention relates to a laser scanner and a laser display system. The laser scanner takes an electrostriction ceramic micro-actuator as a core part, and the reduction of the requirements of partition error, revolving speed and extreme high stability of a rotating mirror constituting a television laser display system can be realized. In addition, according to the laser display system provided by the invention, the coherent noise of a combined beam is eliminated by electro-optical crystals, so that laser speckles can be eliminated, and the high definition of image quality is improved.
Description
Technical field
The present invention relates to laser display field, particularly, relate to a kind of laser television, the laser scanning device of laser film and indoor or outdoor large screen laser display and laser display system.
Background technology
TV, color monitor have become modern life necessity, due to great potential and the profit in this market, each state be all devoted to development high definition and large screen display to meet the demand of people to the continuous renewal of this product, such as: large screen plasma body display (PDP), liquid crystal display (LCD) etc.Be a kind of trend of Development of Laser Technology using laser as the light source of color monitor, be also the dream of researcher simultaneously always.In succession succeeding in developing and putting on market along with red, green, blue three coloured light semiconductor laser, makes the appearance of laser television become possibility, and becomes the most strong competitor in 21 century monitor market.The monochromaticjty of laser is good, in color and luster, laser can control output wavelength more accurately, compare with traditional high image quality display, the color that laser represents is more sufficient and true to nature, the color of reproduced image can not only be ensured, and also can show the high saturation that occurring in nature is difficult to see.The directivity of laser is extremely strong, the diversity of light beam is very little, thus beats and remain a gem-pure sparklet on screen, substantially increase the definition of image, laser display can control laser spots exactly and beat the position on screen, can overcome the distortion of image problem that traditional monitor exists.Except the remarkable advantage of color and luster, definition aspect, laser display is low to environmental requirement, and usually without the need to any optical focusing system, display size can adjust arbitrarily, can develop into the multifunctional product of over-large screen display system, film and projection integration.
The composition of existing laser display system comprises source signal modulation circuit, laser, Multiplexing apparatus and scanning means.The method that current scanline controls all adopts mechanical system.The field sync signal separated from source signal, line synchronizing signal are respectively through galvanometer control circuit, tilting mirror control circuit, make galvanometer do perpendicualr field scanning to swing, make tilting mirror make horizontal line sweep to rotate, the colourama that modulated three look laser are formed through splicer, first be mapped on horizontal sweep tilting mirror, reflex on galvanometer by tilting mirror again, galvanometer reflects light on screen and forms coloured image.The structure of tilting mirror has rotor in stator periphery, and the outermost layer of rotor is polyhedral metal mirror surface, and the winding of stator is connected with the circuit on tilting mirror control circuit board, accepts the control of line synchronizing signal.The structure of galvanometer is fixed on the support on casing to be fixedly mounted with electromagnetic oscillation device, and one end of the output shaft of electromagnetic oscillation device is fixedly mounted with galvanometer, and electromagnetic oscillation device is connected with the circuit on galvanometer control circuit board, accepts the control of field sync signal.This scan control mode is high to the segmentation error of tilting mirror, the rotating speed of tilting mirror and stability requirement thereof, as KetabehiMehrdadet.al.Pougonalscannersubsystemforlaserdis play [J] .Proc.SPIE, 1997,3131,20-29; RisseStefanet.al.Designofafasthighprecisionpolygonalscan nerforHDTV [J] .Proc.SPIE, 1997,3131,11-19 reports.Patent of invention CN03153275.6 has invented one and has utilized the scanning of piezoelectric ceramic device control light path for this reason.The document is incorporated herein by reference in full.Then in the device that the document provides, after tricolor laser ECDC light, can coherent noise be produced, thus produce speckle, so this device still not optimally embodies the feature of laser display.
Summary of the invention
The object of this invention is to provide a kind of laser scanning device and laser display system, for overcoming at least one in above-mentioned technical problem, namely eliminating laser speckle and improve image quality high definition and/or realize reducing the requirement high to the segmentation error of tilting mirror forming TV laser display system, the rotating speed of tilting mirror and stability thereof.
One aspect of the present invention provides a kind of laser display system, comprise signal receiving circuit, signal processing circuit, demultiplexing circuit, sound accompaniment circuit, loud speaker, three primary colors modulation circuit, tricolor laser device, splicer, scan controller, line scan signals modulation circuit, line scan signals Nonlinear Adjustment compensating circuit, field scan signal modulation circuit, field scan signal non-linear modulation compensating circuit and electrooptic crystal, wherein
Signal receiving circuit is used for receiver, video and audio signal;
Signal processing circuit for the treatment of receive signal and send to demultiplexing circuit;
Isolated voice signal is input to sound accompaniment circuit by demultiplexing circuit, exports through loud speaker; Isolated tristimulus signals are input to three primary colors modulation circuit, and drive tricolor laser device, to control its output intensity; Isolated line scan signals and field scan signal are input to line scan signals modulation circuit and field scan signal modulation circuit respectively;
Splicer is used for light beam coaxial for three look Laser synthesizing of tricolor laser device outgoing;
Line scan signals modulation circuit receives from the isolated line scan signals of demultiplexing circuit and be sent to scan controller after line scan signals Nonlinear Adjustment compensating circuit compensates;
The isolated field scan signal of field scan signal modulation circuit Received signal strength split circuit is also sent to scan controller after field scan signal non-linear modulation compensating circuit compensates;
Electrooptic crystal is applied with the voltage of change at random, for eliminating the coherent noise of synthesis light beam; And
Scan controller receives synthesis light beam, carries out line scanning and field scan, and output signal projected on screen to form image under the row after compensation and field scan signal drive to the synthesis light beam received.
In one alternate embodiment, this electrooptic crystal is arranged in the light path between splicer and scan controller, for changing the phase place of the synthesis light beam from splicer outgoing; Or this electrooptic crystal is arranged in the light path between at least one and the splicer in tricolor laser device, for changing the phase place of the light beam from corresponding laser emitting.
In one alternate embodiment, this scan controller comprises the light reflecting device be made up of four Electrostrictive ceramic micropositioner WTDS, wherein
One WTDS and the 2nd WTDS forms line scanning unit, for carrying out line scanning to synthesis light beam;
3rd WTDS and the 4th WTDS forms field scan unit, for carrying out field scan to the synthesis light beam after line scanning.
In one alternate embodiment, this line scanning unit comprises:
First substrate, one end of a WTDS and the 2nd WTDS is vertically fixed on first substrate upper surface;
Optical mirror, the other end of a WTDS and the 2nd WTDS is attached this optical mirror, wherein this optical mirror rotation axis to the rotation axis of first substrate to orthogonal in same plane;
First electrode pair, for being applied to a WTDS by the line scan signals from line scan signals circuit and line scan signals Nonlinear Adjustment compensating circuit;
Second electrode pair, for the line scan signals from line scan signals circuit and line scan signals Nonlinear Adjustment compensating circuit is applied to the 2nd WTDS,
The phase by pi of the line scan signals wherein the first and second WTDS applied, to make optical mirror around its central axis.
In one alternate embodiment, this field scan unit comprises:
Second substrate, wherein one end of the 3rd WTDS and the 4th WTDS is vertically fixed on second substrate upper surface, the lower surface of the other end attachment first substrate of the 3rd WTDS and the 4th WTDS, and the orientation of the 3rd, the 4th WTDS is orthogonal vertical with first, second WTDS device;
Base, for fixing second substrate;
Third electrode pair, for future self-fields signal circuit and the field scan signal of field signal Nonlinear Adjustment compensating circuit be applied to the 3rd WTDS;
4th electrode pair, for future self-fields signal circuit and the field scan signal of field signal Nonlinear Adjustment compensating circuit be applied to the 4th WTDS,
The phase by pi of the field scan signal wherein the third and fourth WTDS applied, to make first substrate around its center axis of rotation.
In one alternate embodiment, WTDS is made up of with series connection or series-parallel mode multiple ceramic unit sheet.
In one alternate embodiment, this splicer is made up of orthogonal first optical mirror slip and the second optical mirror slip, and the first optical mirror slip and the second optical mirror slip are configured to the three primary colors light incided in splicer is coaxially exported after splicer.
In one alternate embodiment, this first optical mirror slip becomes miter angle with two in the three look laser incided in splicer, and wherein laser of the same colour reflects, and another look laser is launched; This second optical mirror slip becomes miter angle with the 3rd in the three look laser incided in splicer, and wherein this look laser reflects.
In one alternate embodiment, this line scan signals Nonlinear Adjustment compensating circuit and/or field scan signal Nonlinear Adjustment compensating circuit comprise by the Nonlinear Adjustment circuit of Microprocessor S3C44B0X further, with make this optical mirror pendulum angle and sweep time linear.
By introducing the electrooptic crystal being applied with the voltage of change at random in systems in which, the coherent noise of synthesis light beam can be eliminated, thus eliminate laser speckle, improve image quality high definition.
The another aspect of the present invention one provides a kind of laser scanning device for laser display system, laser beam, line scan signals and field scan signal is received from this laser system, and under line scan signals and field scan signal drive, line scanning and field scan are carried out to the laser beam received, it is characterized in that, comprise the light reflecting device be made up of four Electrostrictive ceramic micropositioner WTDS
Wherein
One WTDS and the 2nd WTDS forms line scanning unit, and for carrying out line scanning to synthesis light beam, this line scanning unit comprises:
First substrate, one end of a WTDS and the 2nd WTDS is vertically fixed on first substrate upper surface;
Optical mirror, the other end of a WTDS and the 2nd WTDS is attached this optical mirror, wherein this optical mirror rotation axis to the rotation axis of first substrate to orthogonal in same plane;
First electrode pair, for being applied to a WTDS by line scan signals;
Second electrode pair, for line scan signals being applied to the 2nd WTDS,
The phase by pi of the line scan signals wherein the first and second WTDS applied, to make optical mirror around its central axis,
And wherein
3rd WTDS and the 4th WTDS forms field scan unit, and for carrying out field scan to the synthesis light beam after line scanning, this field scan unit comprises:
Second substrate, wherein one end of the 3rd WTDS and the 4th WTDS is vertically fixed on second substrate upper surface, the lower surface of the other end attachment first substrate of the 3rd WTDS and the 4th WTDS, and the orientation of the 3rd, the 4th WTDS is orthogonal vertical with first, second WTDS device;
Base, for fixing second substrate;
Third electrode pair, for being applied to the 3rd WTDS by field scan signal;
4th electrode pair, for field scan signal is applied to the 4th WTDS,
The phase by pi of the field scan signal wherein the third and fourth WTDS applied, to make first substrate around its center axis of rotation.
Utilize the scan controller be made up of four Electrostrictive ceramic micropositioners of the present invention can realize reducing the requirement high to the segmentation error of tilting mirror forming TV laser display system, the rotating speed of tilting mirror and stability thereof.
Accompanying drawing explanation
By referring to the description of accompanying drawing to the embodiment of the present invention, above-mentioned and other objects of the present invention, feature and advantage will be more clear, in the accompanying drawings:
Fig. 1 illustrates laser display system according to an embodiment of the invention;
Fig. 2 illustrates splicer according to an embodiment of the invention;
Fig. 3 (A) illustrates line scanning device according to an embodiment of the invention; And
Fig. 3 (B) illustrates field scan device according to an embodiment of the invention.
Reference numeral
1. signal receiving circuit; 2. signal processing circuit; 3. demultiplexing circuit; 4. sound accompaniment circuit; 5. the danger signal input of three primary colors modulation circuit; 6. the green input of three primary colors modulation circuit; 7. the blue signal input of three primary colors modulation circuit; 8. red emitting laser; 9. green emitting laser; 10. blue emitting laser; 11. splicers; 12. scan controllers; 13. line scan signals modulation circuits; 14. field scan signal modulation circuits; 15. line scan signals Nonlinear Adjustment compensating circuits; 16. field scan signal non-linear modulation compensating circuits; 17. screens; 18,19. optical mirror slips; 20,21. column WTDS devices; 22. substrates; 23. bases; 24. substrates; 25,26. column WTDS devices; 27. optical mirrors; 28. laser beam axis; 29. electrooptic crystals.
It should be noted that this Figure of description is not proportionally drawn, and be only schematic object, therefore, should not be understood to any limitation and restriction to the scope of the invention.In the accompanying drawings, similar part identifies with similar drawing reference numeral.
Embodiment
Below in conjunction with accompanying drawing, technical scheme of the present invention is further described.Be described in detail referring to accompanying drawing, described accompanying drawing forms a part of the present invention, and in the present invention, accompanying drawing is by showing to the explanation implementing specific embodiments of the invention.Should be understood that the embodiment and the change can carried out in structure or in logic that can to adopt other when not departing from scope of the present invention.Such as, the feature for an embodiment explanation or description can be used to other embodiment or be combined with other embodiment generate another embodiment.Its intention is to the present invention includes such modifications and variations.The specific statement of these examples describes, but they should not be understood to the restriction to appended right.Accompanying drawing only not to be drawn in proportion for explanatory object.Unless stated otherwise, for clearly object, corresponding element adopts same Reference numeral to represent in different drawings.
Term " has ", " containing ", and " comprising ", " comprising " etc. are open, they represent described by structure, the existence of element or feature, but do not get rid of additional element or feature.
Fig. 1 shows laser display system according to an embodiment of the invention.This laser display system comprises signal receiving circuit 1, signal processing circuit 2, demultiplexing circuit 3, sound accompaniment circuit 4, loud speaker, three primary colors modulation circuit, tricolor laser device, splicer 11, electrooptic crystal 29, scan controller 12, line scan signals modulation circuit 13, field scan signal modulation circuit 14, line scan signals Nonlinear Adjustment compensating circuit 15 and field scan signal non-linear modulation compensating circuit 16, wherein
This signal receiving circuit 1 is for receiver, video and audio signal, and in a concrete example, this signal receiving circuit 1 is tuner.
Signal processing circuit 2 for the treatment of this reception signal and send to demultiplexing circuit 3.In a concrete example, the signal input part of signal processing circuit 2 is connected with the signal output part of signal receiving circuit 1, and the signal output part of signal processing circuit 2 is connected with the signal input part of demultiplexing circuit 3.
Isolated voice signal is input to sound accompaniment circuit 4 by demultiplexing circuit 3, exports through loud speaker; Isolated tristimulus signals are input to three primary colors modulation circuit by demultiplexing circuit 3, and drive tricolor laser device, to control the intensity size that they export light.In a concrete example, tristimulus signals are red, green, blue signal, correspondingly, three primary colors modulation circuit is respectively red 5, green 6, blue 7 three primary colors modulation circuits, and tricolor laser device is respectively red laser 8, green (light) laser 9 and the blue laser 10 of launching red, green, blue three coloured light.The signal red, green, blue input 5,6,7 of three primary colors modulation circuit is corresponding with the red, green, blue signal output part of demultiplexing circuit 3 respectively to be connected; Red 8, green 9, blue 10 3 lasers are connected with the red, green, blue signal output part of three primary colors modulation circuit respectively.
Splicer 11 is by a branch of coaxial laser of three look Laser synthesizing of tricolor laser device outgoing.In a concrete example, the signal input part of splicer 11 is connected with signal output part that is red 8, green 9, blue 10 3 lasers respectively, as shown in Figure 1.
Preferably, as shown in Figure 2, splicer 11 is made up of the mutually perpendicular optical mirror slip 18,19 of two panels, the laser beam axis 28 of two lasers wherein in tricolor laser device becomes miter angle with an optical mirror slip respectively, the Output of laser optical axis 28 of the 3rd laser becomes miter angle with another optical mirror slip, ensures that three beams of laser is coaxial after splicer mixing like this.Ruddiness and the optical mirror slip 18 one-tenth miter angle of such as red laser outgoing incide on optical mirror slip 18, and reflect, green glow and the optical mirror slip 18 one-tenth miter angle of green (light) laser outgoing incide on optical mirror slip 18, and reflect, blue light and the optical mirror slip 19 one-tenth miter angle of blue laser outgoing incide on optical mirror slip 19, and reflect, this three-beam coaxially exports.Certainly, those skilled in the art are according to instruction of the present invention, also other version can be expected, the ruddiness of such as red laser outgoing incides on optical mirror slip 18 with optical mirror slip 18 one-tenth miter angle, and reflects, and green glow and the optical mirror slip 18 one-tenth miter angle of green (light) laser outgoing incide on optical mirror slip 18, and reflect, the blue light of blue laser outgoing incides on optical mirror slip 19 with optical mirror slip 19 one-tenth miter angle, and reflects, and this three-beam coaxially exports.
In a preferred exemplary, as indicated with 1, close the light beam after light through electrooptic crystal 29, electrooptic crystal is applied with the voltage of change at random, the random phase place changing synthesis light beam, thus the speckle that elimination coherent noise brings.
In one more preferably example, electrooptic crystal 29 can be arranged in the light path between tricolor laser device and splicer 11, such as be arranged in the light path in red laser 8, green (light) laser 9 and blue laser 10 between at least one and splicer 11, and be applied with the voltage of change at random, the phase place of the corresponding light beam of random change, thus the speckle that after eliminating synthesis, coherent noise brings.
Line scan signals modulation circuit 13 receives from the isolated line scan signals of demultiplexing circuit 3 and be sent to scan controller 12 after line scan signals Nonlinear Adjustment compensating circuit 15 compensates.In a concrete example, signal input part and the demultiplexing circuit 3 of line scan signals modulation circuit 13 are isolated line scan signals output and are connected, and the signal output part of line scan signals modulation circuit 13 is connected with the signal input part of line scan signals Nonlinear Adjustment compensating circuit 15.
The isolated field scan signal of field scan signal modulation circuit 14 Received signal strength split circuit 3 is also sent to scan controller 12 after field scan signal non-linear modulation compensating circuit 16 compensates.In a concrete example, signal input part and the demultiplexing circuit 3 of field scan signal modulation circuit 14 are isolated field scan signal output part and are connected, and the signal output part of field scan signal modulation circuit 14 is connected with the signal input part of field scan signal non-linear modulation compensating circuit 16.
Scan controller 12 receives synthesis light beam, carries out line scanning and field scan under the row after compensation and field scan signal drive to the synthesis light beam received, and output signal is projected on screen 17 and form image.In a concrete example, the signal input part a of the scanning means in scan controller 12 is connected with the signal output part of splicer 11; The signal input part b of scanning means is connected with the signal output part of line scan signals Nonlinear Adjustment compensating circuit 15; The signal input part c of scanning means and the signal output part of field scan signal non-linear modulation compensating circuit 16 connect.
Light beam after above-mentioned conjunction light is in the embodiment of electrooptic crystal 29, and scan controller 12 receives the synthesis light beam from electrooptic crystal 29 outgoing.
In embodiment in the light path of electrooptic crystal 29 between laser and splicer 11, scan controller 12 directly receives synthesis light beam from splicer 11.
In a concrete example of the present invention, scan controller 12 is for core component with Electrostrictive ceramic micropositioner (WTDS), the light reflecting device be made up of four WTDS devices, under the driving of on the scene and line scan signals circuit and field and line scan signals Nonlinear Adjustment compensating circuit, laser reflection can be scanned into a width picture.
Wherein, described WTDS is made with laminated process by PLZT ceramic material (under electric field action, this material lattice location causes dielectric relaxation and deformation occurs).It is the device that a kind of high displacement resolution voltage controls miniature deformation.There is displacement resolution high (tens nanometers), respond fast, delayed little, the outstanding advantages such as back to zero reproducibility is good, good stability.It is optics, machining, electronics, aviation, biology, medical science, realize the desirable performer of the functions such as superfinishing location, microstoning, error compensation, phase-modulation in the field such as genetic engineering and optical-fibre communications.
That the present invention adopts is the displacement S=nME of the column WTDS device sticked into by laminar electrostrictive ceramic, device
2, n is stacked number, and M is the coefficient of strain, and E is the electric field applied.WTDS device is capacity load, each ceramic unit sheet is equivalent to a capacitor, electric capacity is larger, response speed is slower, so preferably, adopt the mode that series connection or connection in series-parallel combine in the WTDS device that the present invention adopts between ceramic unit sheet, in order to reduce total capacitance, improve response speed, can meet and realize the TV Field of regulation, the speed of line scanning.
In a concrete example, this light reflecting device comprises the line scanning unit as shown in Fig. 3 (A) and the field scan unit as shown in Fig. 3 (B).
Wherein, line scanning unit is formed as follows: one end of two column WTDS devices 25,26 is vertically fixed on substrate 24 upper surface, other end attachment (including but not limited to bonding) optical mirror 27 of column WTDS device 25,26, optical mirror 27 rotation axis to substrate 24 rotation axis to orthogonal in same plane.Column WTDS device 25,26 two ends are used for line scan signals to be applied to corresponding column WTDS device 25,26 respectively by the respective electrode pair of respective electrode pair connected row sweep signal circuit 13 and line scan signals Nonlinear Adjustment compensating circuit 15, column WTDS device 25,26.
Field scan unit is formed as follows: one end of two other column WTDS device 20,21 vertically fixing on substrate 22, its orientation is orthogonal vertical with column WTDS device 25,26 below.Substrate 22 is packed on base 23.The lower surface of other end attachment (including but not limited to bonding) substrate 24 of column WTDS device 20,21, the respective electrode pair that column WTDS device 20,21 two ends connect field signal circuit 14 and field signal Nonlinear Adjustment compensating circuit 16, column WTDS device 20,21 respectively by respective electrode pair is used for field scan signal to be applied to corresponding column WTDS device 20,21.
Like this, when two line scan signals of phase phase difference of pi in place are applied on the respective electrode pair of two the column WTDS devices 25,26 in line scanning unit, column WTDS device 25,26 does move toward one another, an elongation, another shrinks, and the optical mirror 27 that band is dynamically connected therebetween thus carries out reciprocating rotation at the uniform velocity in time.
Similarly, when two field scan signals of phase phase difference of pi in place are applied on the respective electrode pair of two the column WTDS devices 20,21 in field scan unit, column WTDS device 20,21 also move toward one another, an elongation, another shrinks, and is with the substrate 24 of the two upper surface that is dynamically connected to carry out at the uniform velocity reciprocating rotation in time around its central rotating shaft thus.
Synthesized after a branch of signal laser through splicer by three look laser of television signal modulation, project on optical mirror 27, produce a laser spots.Under the orthogonal substrate 24 of rotating shaft and optical mirror 27 rotary action, be scanned into a width picture.What the line scanning unit that two column WTDS devices 25,26 form above realized is line scanning, under the driving of line scan signals circuit and Nonlinear Adjustment circuit, by alignment for the laser dot scans projecting optical mirror upper surface center; What the field scan unit that two column WTDS devices 20,21 form below realized is field scan, scan line is extended into a width picture under the driving of sweep signal circuit on the scene and Nonlinear Adjustment circuit.
Because the displacement of WTDS device becomes quadratic relationship with applying electric field, for reaching the object of uniform speed scanning, even if minute surface pendulum angle and sweep time linear, preferably, this line scan signals Nonlinear Adjustment compensating circuit and/or field scan signal Nonlinear Adjustment compensating circuit comprise further by the Nonlinear Adjustment circuit of Microprocessor S3C44B0X.
The present invention's laser is as light source, using Electrostrictive ceramic micropositioner as the core component of scan controller, eliminate the coherent noise of synthesis light beam with electrooptic crystal, thus laser speckle raising image quality high definition can be eliminated and/or can realize reducing the requirement high to the segmentation error of tilting mirror forming TV laser display system, the rotating speed of tilting mirror and stability thereof.
With reference to embodiments of the invention, explanation is given to the present invention above.But these embodiments are only used to the object illustrated, and are not intended to limit the scope of the invention.Scope of the present invention is by claims and equivalents thereof.Do not depart from the scope of the present invention, those skilled in the art can make a variety of substitutions and modifications, and these substitutions and modifications all should fall within the scope of the present invention.
Claims (10)
1. a laser display system, it is characterized in that, comprise signal receiving circuit (1), signal processing circuit (2), demultiplexing circuit (3), sound accompaniment circuit (4), loud speaker, three primary colors modulation circuit (5, 6, 7), tricolor laser device (8, 9, 10), splicer (11), scan controller (12), line scan signals modulation circuit (13), line scan signals Nonlinear Adjustment compensating circuit (14), field scan signal modulation circuit (15), field scan signal non-linear modulation compensating circuit (16) and electrooptic crystal (29), wherein
Signal receiving circuit is used for receiver, video and audio signal;
Signal processing circuit for the treatment of receive signal and send to demultiplexing circuit;
Isolated voice signal is input to sound accompaniment circuit by demultiplexing circuit, exports through loud speaker; Isolated tristimulus signals are input to three primary colors modulation circuit, and drive tricolor laser device, to control its output intensity; Isolated line scan signals and field scan signal are input to line scan signals modulation circuit and field scan signal modulation circuit respectively;
Splicer is used for light beam coaxial for three look Laser synthesizing of tricolor laser device outgoing;
Line scan signals modulation circuit receives from the isolated line scan signals of demultiplexing circuit and be sent to scan controller after line scan signals Nonlinear Adjustment compensating circuit compensates;
The isolated field scan signal of field scan signal modulation circuit Received signal strength split circuit is also sent to scan controller after field scan signal non-linear modulation compensating circuit compensates;
Electrooptic crystal is applied with the voltage of change at random, for eliminating the coherent noise of synthesis light beam; And
Scan controller receives synthesis light beam, carries out line scanning and field scan, and output signal projected on screen to form image under the row after compensation and field scan signal drive to the synthesis light beam received.
2. system according to claim 1, is characterized in that,
This electrooptic crystal is arranged in the light path between splicer and scan controller, for changing the phase place of the synthesis light beam from splicer outgoing; Or
This electrooptic crystal is arranged in the light path between at least one and the splicer in tricolor laser device, for changing the phase place of the light beam from corresponding laser emitting.
3. system according to claim 1 and 2, is characterized in that, this scan controller comprises the light reflecting device be made up of four Electrostrictive ceramic micropositioner WTDS, wherein
One WTDS (25) and the 2nd WTDS (26) forms line scanning unit, for carrying out line scanning to synthesis light beam;
3rd WTDS (20) and the 4th WTDS (21) forms field scan unit, for carrying out field scan to the synthesis light beam after line scanning.
4. system according to claim 3, is characterized in that, this line scanning unit comprises:
First substrate (24), one end of a WTDS and the 2nd WTDS is vertically fixed on first substrate upper surface;
Optical mirror (27), the other end of a WTDS and the 2nd WTDS is attached this optical mirror, wherein this optical mirror rotation axis to the rotation axis of first substrate to orthogonal in same plane;
First electrode pair, for being applied to a WTDS by the line scan signals from line scan signals circuit and line scan signals Nonlinear Adjustment compensating circuit;
Second electrode pair, for the line scan signals from line scan signals circuit and line scan signals Nonlinear Adjustment compensating circuit is applied to the 2nd WTDS,
The phase by pi of the line scan signals wherein the first and second WTDS applied, to make optical mirror around its central axis.
5. system according to claim 4, is characterized in that, this field scan unit comprises:
Second substrate (22), wherein one end of the 3rd WTDS and the 4th WTDS is vertically fixed on second substrate upper surface, the lower surface of the other end attachment first substrate of the 3rd WTDS and the 4th WTDS, and the orientation of the 3rd, the 4th WTDS is orthogonal vertical with first, second WTDS device;
Base, for fixing second substrate;
Third electrode pair, for future self-fields signal circuit and the field scan signal of field signal Nonlinear Adjustment compensating circuit be applied to the 3rd WTDS;
4th electrode pair, for future self-fields signal circuit and the field scan signal of field signal Nonlinear Adjustment compensating circuit be applied to the 4th WTDS,
The phase by pi of the field scan signal wherein the third and fourth WTDS applied, to make first substrate around its center axis of rotation.
6. system according to claim 3, is characterized in that, each in these four WTDS is formed with series connection or series-parallel mode by multiple ceramic unit sheet.
7. system according to claim 1, it is characterized in that, this splicer is made up of orthogonal first optical mirror slip and the second optical mirror slip, and the first optical mirror slip and the second optical mirror slip are configured to the three primary colors light incided in splicer is coaxially exported after splicer.
8. system according to claim 7, is characterized in that,
This first optical mirror slip becomes miter angle with two in the three look laser incided in splicer, and wherein laser of the same colour reflects, and another look laser is launched;
This second optical mirror slip becomes miter angle with the 3rd in the three look laser incided in splicer, and wherein this look laser reflects.
9. the system according to claim 4 or 5, it is characterized in that, this line scan signals Nonlinear Adjustment compensating circuit and/or field scan signal Nonlinear Adjustment compensating circuit comprise by the Nonlinear Adjustment circuit of Microprocessor S3C44B0X further, with make this optical mirror pendulum angle and sweep time linear.
10. the laser scanning device for laser display system, laser beam, line scan signals and field scan signal is received from this laser system, and under line scan signals and field scan signal drive, line scanning and field scan are carried out to the laser beam received, it is characterized in that, comprise the light reflecting device be made up of four Electrostrictive ceramic micropositioner WTDS
Wherein
One WTDS (25) and the 2nd WTDS (26) forms line scanning unit, and for carrying out line scanning to synthesis light beam, this line scanning unit comprises:
First substrate (24), one end of a WTDS and the 2nd WTDS is vertically fixed on first substrate upper surface;
Optical mirror (27), the other end of a WTDS and the 2nd WTDS is attached this optical mirror, wherein this optical mirror rotation axis to the rotation axis of first substrate to orthogonal in same plane;
First electrode pair, for being applied to a WTDS by line scan signals;
Second electrode pair, for line scan signals being applied to the 2nd WTDS,
The phase by pi of the line scan signals wherein the first and second WTDS applied, to make optical mirror around its central axis,
And wherein
3rd WTDS (20) and the 4th WTDS (21) forms field scan unit, and for carrying out field scan to the synthesis light beam after line scanning, this field scan unit comprises:
Second substrate (22), wherein one end of the 3rd WTDS and the 4th WTDS is vertically fixed on second substrate upper surface, the lower surface of the other end attachment first substrate of the 3rd WTDS and the 4th WTDS, and the orientation of the 3rd, the 4th WTDS is orthogonal vertical with first, second WTDS device;
Base, for fixing second substrate;
Third electrode pair, for being applied to the 3rd WTDS by field scan signal;
4th electrode pair, for field scan signal is applied to the 4th WTDS,
The phase by pi of the field scan signal wherein the third and fourth WTDS applied, to make first substrate around its center axis of rotation.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510645977.3A CN105120188A (en) | 2015-10-08 | 2015-10-08 | Laser scanner and laser display system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510645977.3A CN105120188A (en) | 2015-10-08 | 2015-10-08 | Laser scanner and laser display system |
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| CN105357454A (en) * | 2015-10-08 | 2016-02-24 | 杭州虹视科技有限公司 | Laser scanning device and laser display system |
| CN109444848A (en) * | 2018-10-25 | 2019-03-08 | 上海禾赛光电科技有限公司 | Scanning means and its scan method, laser radar |
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| CN109444848B (en) * | 2018-10-25 | 2021-03-19 | 上海禾赛科技股份有限公司 | Scanning device and scanning method thereof, and laser radar |
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Address after: Room 2, building 600, No. 21, No. 310018, Baiyang street, Hangzhou economic and Technological Development Zone, Zhejiang, China Applicant after: Hangzhou Zhongke Aurora Technology Co., Ltd. Address before: Room 2, building 600, No. 21, No. 310008, Baiyang street, Hangzhou economic and Technological Development Zone, Zhejiang, China Applicant before: HANGZHOU HONGSHI TECHNOLOGY CO., LTD. |
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Application publication date: 20151202 |