CN103200374B - Projector, for driving the apparatus and method of its optical scanner - Google Patents
Projector, for driving the apparatus and method of its optical scanner Download PDFInfo
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- CN103200374B CN103200374B CN201310002344.1A CN201310002344A CN103200374B CN 103200374 B CN103200374 B CN 103200374B CN 201310002344 A CN201310002344 A CN 201310002344A CN 103200374 B CN103200374 B CN 103200374B
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Abstract
The present invention relates to projector, for driving the apparatus and method of its optical scanner.Sensing signal processor receives the sensing signal of the sensing of the operation representing optical scanner, and produces the horizontal time-base corresponding with the horizontal frequency of optical scanner based on the sensing signal received.Driving signal generator includes indicating the horizontal reference signal of line information of horizontal quantity of horizontal drive signals of optical scanner, reference clock signal and at least one in the scanner drive signal driving optical scanner for producing based on produced horizontal time-base.
Description
Technical field
The present invention relates to projector, more particularly, to projector with for driving the dress of the optical scanner of projector
Put and method, it is possible to increase system stability and video data and the synchronicity of voice data.
Background technology
Multimedia developing rapidly requires big display screen and high-resolution.Recently, except high-resolution, present nature
Color is also considered as important.
The light source with high color purity, such as laser instrument must be used, realize perfect Natural color.Use laser
Produce a kind of projector being to use optical scanner in the device of image.Projector use optical scanner with from
The light beam scanning screen that lasing light emitter produces is to form image on screen.
In order to produce high-definition picture, optical scanner needs to operate with high actuating speed.When driving signal, there is spy
When determining frequency, the driving angle of optical scanner increases.Increase the spy driving signal of the driving angle of optical scanner
Determine frequency and be referred to as resonant frequency.Therefore, when driving signal corresponding to resonant frequency, drive angle to reach flood
Flat and optical scanner can at full speed be driven.
But, owing to the processing variation in the manufacture of optical scanner causes resonant frequency to change, the very raw correspondence of difficult labour
Driving signal in resonant frequency.Except processing variation, the resonant frequency of optical scanner may also rely on and is input to
The intensity of the light of optical scanner and change.It is to say, the intensity of light owing to being input to optical scanner is uneven,
The temperature of optical scanner changes over time, thus the resonant frequency of optical scanner changed also with the time.
The resonant frequency changed due to this, optical scanner be not responsive to the vertically and horizontally driving signal that is transfused to and
Operation, produces and drives error.The driving error of optical scanner cause shown left side and the part on right side or
A part for top or bottom exchanges each other and reduces the size of shown image.
Summary of the invention
Therefore, the present invention relates to projector and for driving the apparatus and method of the optical scanner of projector, it is basic
On eliminate one or more problem caused due to restriction and the shortcoming of prior art.
It is an object of the invention to provide projector and for driving the apparatus and method of the optical scanner of projector, its energy
Enough and the video data being input to projector verticial-sync signal synchronously drives optical scanner.
It is a further object to provide projector and for driving device and the side of the optical scanner of projector
Method, it can drive optical scanner, maintains the horizontal frequency of optical scanner uniformly and by optical scanner simultaneously
Vertical frequency lock to the verticial-sync signal of the video data being imported into projector.
The further advantage of the present invention, purpose and a feature part will be illustrated in the following description, and one
Divide and will be made apparent from after studying herein below carefully to those skilled in the art, or can be from the practice of the present invention
Know.Object of the present invention and further advantage can be by description the most written at this and claims thereof and attached
The structure specifically noted in figure realizes and obtains.
In order to realize these purposes and further advantage, and according to the purpose of the present invention, such as citing herein and extensively retouch
State, it is proposed that a kind of projector, described projector includes: video processor, and described video processor is used for receiving
Video data and the verticial-sync signal of described video data；And, scanner driver, described scanner driver
Described the most same based on receive for controlling the horizontal quantity of the horizontal drive signals of described optical scanner
Walk signal and change.
Described scanner driver can produce horizontal sweep letter based on the sensing signal received from described optical scanner
Number, and include that the described horizontal drive to described optical scanner is believed based on the described horizontal time-base generation produced
Number described horizontal described quantity carry out indicating the horizontal reference signal of line information, reference clock signal and for
Drive at least one in the scanner drive signal of described optical scanner.
Described video processor can produce for controlling the described video counts received based on described horizontal reference signal
According to output timing reading enable signal.
Described projector can also include: lasing light emitter, and described lasing light emitter is for launching the light for showing described video data
Bundle；And, laser driver, described laser driver is for enabling, based on according to described reading, the institute that signal exports
The described reference clock signal stating video data and generation produces the laser drive signal for driving described lasing light emitter.
Described video processor may include that adjustor, and described adjustor is for based on the described horizontal reference letter produced
Number produce described read enable signal；And, Memory Controller, described Memory Controller is for according to described reading
Take the enable signal described video data of control and export described laser driver.
Described video processor can cache described video data as the data with the size less than frame of video.
Described scanner driver can control so that with described optical scanner return period corresponding horizontal
Quantity is maintained odd number or even number.
In another aspect of the present invention, it is proposed that for driving the device of optical scanner, described device includes: sense
Surveying signal processor, described sensing signal processor is for receiving the sense of the sensing of the operation representing described optical scanner
Survey signal, and produce corresponding with the horizontal frequency of described optical scanner based on the described sensing signal received
Horizontal time-base；And, driving signal generator, described driving signal generator is for based on the described water produced
Simple scan signal produces and includes what the horizontal quantity of the horizontal drive signals to described optical scanner indicated
The horizontal reference signal of line information, reference clock signal and for driving the scanner drive signal of described optical scanner
In at least one.
Described optical scanner can scan the horizontal line of the quantity by the instruction of described line information.
The horizontal quantity of the described horizontal drive signals of described optical scanner can change.
Described device can also include: adjustor, and described adjustor is for producing based on produced horizontal reference signal
Signal is enabled for controlling the reading of the output timing of the video data of reception.
In another aspect of the present invention, it is proposed that for the method driving optical scanner, described method includes: sense
The operation of photometry scanning device, the sensing signal of sensing based on the operation representing optical scanner produces and optical scanning
The horizontal time-base that the horizontal frequency of device is corresponding, and produce based on produced horizontal time-base and include indicating institute
State the horizontal reference signal of the line information of the horizontal quantity of the horizontal drive signals of optical scanner, reference clock letter
Number and for driving at least one in the scanner drive signal of described optical scanner.
Described method can also include: produces the output for controlling video data based on produced horizontal reference signal
The reading of sequential enables signal.
Produce horizontal time-base can include removing noise from sensing signal, and the sensing signal of noise will be eliminated
Be converted to clock signal.
Described method can also include: the scanning of described optical scanner is by the horizontal line of the quantity of described line information instruction.
It should be understood that be all exemplary and explanatory to the outlined above and described below of the present invention, and it is intended to institute
Claimed invention provides further explanation.
Accompanying drawing explanation
Accompanying drawing is included in this application to provide a further understanding of the present invention, and is attached in the application and constitutes
The part of the application, accompanying drawing shows embodiments of the present invention, and is used for explaining the present invention together with description
Principle.In the accompanying drawings:
Fig. 1 is the block diagram of projector according to an illustrative embodiment of the invention；
Fig. 2 is the block diagram of scanner driver according to an illustrative embodiment of the invention；
Fig. 3 is the block diagram of video processor according to an illustrative embodiment of the invention；
The synchronization of the horizontally and vertically frequency of Fig. 4 exemplary optical scanning device；
Fig. 5 illustrates and changes the horizontal quantity scanned by optical scanner according to an illustrative embodiment of the invention
Method；
Fig. 6 illustrates another illustrative embodiments according to the present invention and changes the horizontal line scanned by optical scanner
The method of quantity；
Optical scanning in the effectual time of Fig. 7 A illustration horizontal-drive signal according to an illustrative embodiment of the invention
The horizontal drive circulation of device；
Optical scanning in the return period that Fig. 7 B illustrates horizontal-drive signal according to an illustrative embodiment of the invention
The horizontal drive circulation of device；
Light in the return period of the horizontal-drive signal that Fig. 8 illustrates another illustrative embodiments according to the present invention
Learn the horizontal drive circulation of scanning device；
Light in the return period of the horizontal-drive signal that Fig. 9 illustrates another illustrative embodiments according to the present invention
Learn the horizontal drive circulation of scanning device；And
Figure 10 is the flow process illustrating the method for driving optical scanner according to an illustrative embodiment of the invention
Figure.
Detailed description of the invention
The preferred embodiment of the present invention is described more fully below, is illustrated the side of being preferable to carry out of the present invention in the accompanying drawings
The example of formula.Same or like parts are represented by identical reference as far as possible in whole accompanying drawing.
It should be understood that ought such as layer (film), region, pattern or structure in the description of implementation below
Such element be referred to as another element " on " or during D score, it can " directly " at another element
Upper or under, or " indirectly " can be formed such that and there is also intermediary element.It addition, such as " on " or D score
Such wording should understand based on accompanying drawing.
In the accompanying drawings, describing to understand and being easy to, the size of layer is exaggerated, omits or schematically illustrates.It addition,
The size of element not exclusively reflects its actual size.
Fig. 1 is the block diagram of projector 1 according to an illustrative embodiment of the invention.
With reference to Fig. 1, projector 1 can include video processor 10, scanner driver 20, optical scanner 30,
Laser driver 40 and lasing light emitter 50.
Video processor 10 receives video data and video synchronization signal.Video synchronization signal can include vertically synchronizing
Signal Vsync, input level synchronizing signal Hsync, data enable signal Data Enable(data and enable) and time
Clock signal Clock(clock) at least one.
Verticial-sync signal Vsync can be exported scanner driver 20 by video processor 10.Video processor
10 can receive horizontal reference signal Href and based on the horizontal reference signal received from scanner driver 20
Href controls the output timing of video data.It is to say, video processor 10 can be based on horizontal reference signal Href
Control the video data output to laser driver 40.
The video data received can be exported laser driver 40 by video processor 10.In exemplary enforcement
In mode, video processor 10 can process the video data received so that video data is corresponding to be projected
Video format and treated video data is exported laser driver 40.In the exemplary embodiment,
Video processor 10 can carry out noise remove, image quality correction and gamma correction to the video data received,
And calibrated video data is exported laser driver 40.
It addition, video processor 10 can receive reference clock signal ref_clk from scanner driver 20, and will
The reference clock signal ref_clk received exports laser driver 40.
Scanner driver 20 receives verticial-sync signal Vsync from video processor 10.Scanner driver 20
The horizontal quantity controlling to be scanned by optical scanner 30 changes based on verticial-sync signal Vsync received.
Here, the horizontal quantity scanned by optical scanner 30 may refer to the horizontal drive signals of optical scanner 30
Horizontal quantity.
Scanner driver 20 may determine that line information, and produce include determined by the horizontal reference letter of line information
Number Href, the horizontal quantity of the horizontal drive signals of this line information instruction optical scanner 30.In exemplary reality
Executing in mode, scanner driver 20 can receive the operation representing optical scanner 30 from optical scanner 30
The sensing signal of sensing, and produce corresponding with the horizontal frequency of optical scanner based on the sensing signal received
Horizontal time-base.Scanner driver 20 can be based in verticial-sync signal Vsync and horizontal time-base
At least one produces the horizontal reference signal Href including line information.It addition, scanner driver 20 can will be produced
Raw horizontal reference signal Href exports video processor 10.
Additionally, scanner driver 20 can based in verticial-sync signal Vsync and horizontal time-base at least
One produces reference clock signal ref_clk, and is exported at video by produced reference clock signal ref_clk
Reason device 10.
The horizontal quantity that scanner driver 20 can control to be scanned by optical scanner 30 is based on vertically synchronizing letter
In number Vsync and horizontal time-base at least one and change.Scanner driver 20 can be based on vertically synchronizing
At least one in signal Vsync and horizontal time-base produces the scanning device for controlling optical scanner 30 and drives
Signal.Here, scanner drive signal can include vertically driving signal and horizontal drive signals.
Scanner driver 20 can produce scanner drive signal in the starting stage based on verticial-sync signal Vsync.
Scanner driver 20 can in feedback stage is based on verticial-sync signal Vsync and horizontal time-base at least
One produces scanner drive signal.Here, feedback stage refers to the stage after the initialization phase.At feedback stage
The scanner drive signal produced is hereinafter referred to as feedback scan device and drives signal.
Optical scanner 30 is driven under the control of scanner driver 20, and with launching from lasing light emitter 50
Light beam scanning screen.Optical scanner 30 can be according to the scanner drive signal quilt produced by scanner driver 20
Drive.In the exemplary embodiment, optical scanner 30 can be MEMS(MEMS) scanning device.
Optical scanner 30 can sense its operation and the sensing signal of its operation of instruction is exported scanning device driving
Device 20.
Laser driver 40 receives video data and reference clock signal ref_clk from video processor 10, and controls
The light beam of the video data that lasing light emitter 50 processed receives for display with projection.Laser driver 40 can be based on connecing
At least one in the video data received and reference clock signal ref_clk produces for the laser controlling lasing light emitter 50
Device drives signal.Here, the video data received can be defeated according to control based on horizontal reference signal Href
Go out sequential to be output.
Lasing light emitter 50 projects the light beam for showing video data under the control of laser driver 40.Lasing light emitter
50 can be driven according to the laser drive signal produced by laser driver 40.
Fig. 2 is the block diagram of scanner driver according to an illustrative embodiment of the invention.
With reference to Fig. 2, scanner driver 20 can include driving signal generator 210 and sensing signal processor 220.
Driving signal generator 210 produces based on verticial-sync signal Vsync received from video processor 10 and initially sweeps
Retouch device and drive signal, and produced initial scanner driving signal is exported optical scanner 30.Drive signal
Generator 210 can be believed based on verticial-sync signal Vsync and the horizontal sweep produced by sensing signal processor 220
At least one in number Hscan produces feedback scan device and drives signal, and feedback scan device driving signal is exported light
Learn scanning device 30.Here, the horizontal quantity scanned according to initial scanner driving signal by optical scanner 30
Can be differently configured from the horizontal quantity scanned by optical scanner 30 according to feedback scan device driving signal.Additionally,
The horizontal quantity scanned by optical scanner 30 can drive signal to change along with feedback scan device.
Driving signal generator 210 can include unshowned memorizer, digital to analog converter, wave filter and FREQUENCY CONTROL
Device.
Memorizer is to look for table, and can include that first memory and second memory, first memory storage are used for
Driving the horizontal-drive signal of optical scanner 30, second memory storage is for driving the vertical of optical scanner 30
Synchronizing signal.
Digital to analog converter can include the first digital to analog converter and the second digital to analog converter, and the first digital to analog converter is used for will
Storage horizontal-drive signal in the first memory is converted to analogue signal, and the second digital to analog converter is used for will be stored in
Verticial-sync signal in second memory is converted to analogue signal.
Wave filter is low pass filter, including the first wave filter and the second wave filter.Wave filter filters the height of analogue signal
Frequency component drives signal to produce.
It is to say, wave filter can include the first wave filter and the second wave filter, the first wave filter is used for filtering level
The high fdrequency component of synchronizing signal, the second wave filter is for filtering the high fdrequency component of verticial-sync signal.
Frequency controller can control to store the frequency amplification of synchronizing signal in memory according to control signal.
Sensing signal processor 220 produces and optical scanner 30 based on the sensing signal exported from optical scanner 30
The corresponding horizontal time-base Hscan of horizontal frequency.Sensing signal can be carried out by sensing signal processor 220
Signal processing is to produce horizontal time-base.As the example of signal processing, sensing signal processor 220 can be from connecing
The sensing signal received is removed noise and the sensing signal eliminating noise is performed zero crossing, believes with change over clock
Number.In the exemplary embodiment, sensing signal processor 220 can by including difference amplifier poor
Point amplify sensing signal to remove noise and to adjust during noise removal process the skew of signal through differential amplification.
Driving signal generator 210 can export based on verticial-sync signal Vsync with from sensing signal processor 220
Horizontal time-base at least one produce horizontal reference signal Href, this horizontal reference signal include indicate optics
The line information of the horizontal quantity of the horizontal drive signals of scanning device 30.Optical scanner 30 can with number of scans with
The horizontal line identical by the horizontal line quantity of this line information instruction.
Optical scanner driving means according to the embodiment of the present invention can include driving signal generator 210 He
Sensing signal processor 220.In the exemplary embodiment, optical scanner driving means can also include that optics is swept
Retouch device 30.Optical scanner driving means can be the parts of projector.
Fig. 3 is the block diagram of video processor according to an illustrative embodiment of the invention.
With reference to Fig. 3, video processor 10 can include Memory Controller 310 and adjustor 320.In exemplary reality
Executing in mode, video processor 310 can also include for receiving the depositing of frame of video being applied to video processor 310
Reservoir (not shown).
Memory Controller 310 can cache received video data.Memory Controller 310 can cache institute
The video data received is as the data with the size less than frame of video.In the exemplary embodiment,
Memory Controller 310 can include memorizer (not shown).This memorizer (not shown) can have ratio one
The capacity that frame of video is less.
Owing to verticial-sync signal Vsync of the projector 1 according to the present invention with input synchronously drives optical scanner
30, so the vertical frequency of the input of video data and the vertical frequency of output correspond to each other.Therefore, there is no need to execution regard
Frequently the caching of frame, and have to carry out when the vertical frequency of the input of video data with when exporting and there are differences between vertical frequency
The caching of frame of video.Therefore, require that the memory span that one frame of video of ratio is less is used for according to the projector of the present invention
Storage video data.
Memory Controller 310 can control the defeated of video data based on the enable signal that reads exported from adjustor 320
Go out sequential.It is to say, Memory Controller 310 enables signal control video data to Laser Drive based on reading
The output of device 40.
Adjustor 320 produces to read based on the horizontal reference signal Href exported from driving signal generator 210 and enables
Signal, and the produced enable signal that reads is exported Memory Controller 310.Here, adjustor 320 can
To produce the reading enable signal of the output timing for controlling video data so that utilize quantity to believe with by horizontal reference
One frame of video of horizon scan line that the line quantity of number line information that Href includes instruction is identical.
In the exemplary embodiment, adjustor can also be included according to the optical scanner driving means of the present invention
320.Optical scanner driving means according to the present invention can be projector.
The synchronization of the horizontally and vertically frequency of Fig. 4 exemplary optical scanning device.
With reference to Fig. 4, according to variable horizontal resonant frequency, the verticial-sync signal of optical scanner may be uneven.
Therefore, traditional projector must change the verticial-sync signal being applied in so that verticial-sync signal with have variable
The horizontal synchronous signal of frequency.Such as, as horizontal-drive signal effective owing to horizontal-drive signal changes
When the frequency of section increases, the effectual time of verticial-sync signal needs to increase so that the effectual time of verticial-sync signal
Tong Bu with the effectual time of horizontal-drive signal.The effectual time of horizontal-drive signal refers to erecting for a frame of video
The period that returns of directly synchronizing signal time from high to low, and horizontal-drive signal refers to erecting for a frame of video
The straight synchronizing signal time from low to high.
When verticial-sync signal changes along with variable horizontal-drive signal, frame of video may be lost or at a frame
In there may be two images.Additionally, the variable frequency of verticial-sync signal is likely to result in video data and voice data
The most synchronized with each other.
Therefore, verticial-sync signal is locked onto what specified level and changing was scanned by optical scanner 30 by the present invention
Horizontal quantity is with by synchronized with each other to verticial-sync signal and horizontal-drive signal.
Fig. 5 illustrates and changes the horizontal quantity scanned by optical scanner according to an illustrative embodiment of the invention
Method.
In FIG. 5, it is assumed that the verticial-sync signal Input Vsync(of input inputs Vsync) it is 60Hz, input
Horizontal-drive signal be 18KHz, and the horizontal quantity scanning screen necessary is N.It is to say,
N represents according to the input level synchronizing signal scanning included at the video synchronization signal being input to video processor 10
Horizontal quantity.Therefore, each second, horizontal quantity was N*60.
Output verticial-sync signal is locked onto the 60Hz corresponding to inputting verticial-sync signal by projector 1.Owing to working as
Horizontal time-base is reduced to 17KHz(510 from 18KHz) time scanning device vertical frequency Scanner Vsync(sweep
Retouch device Vsync) reduce, so scanner driver 20 reduces the horizontal quantity scanned by optical scanner 30.
Such as, optical scanner 30 the horizontal quantity scanned can be reduced to N-1.
Owing to increasing to 19KHz(520 from 18KHz when horizontal time-base) time vertical frequency Scanner of scanning device
Vsync(scanning device Vsync) increase, so scanner driver 20 increases the water scanned by optical scanner 30
The quantity of horizontal line.Such as, optical scanner 30 the horizontal quantity scanned can increase to N+1.
The present invention changes the horizontal quantity of feedback level scanning signal with by vertical for scanning device frequency Scanner
Vsync(scanning device Vsync) maintain the level identical with inputting vertical frequency.It is to say, by changing
Quantity N*60 of the line for the scheduled time (such as, one second) of 60Hz and the level for each frame of video
The quantity of line, quantity n*60 for the line of the described scheduled time at 60Hz can be adjusted to by the present invention
(N-1)+N+(N-1)+(N+1)…(N)。
Owing to adding the horizontal line scanned by optical scanner 30 to or from the line that horizontal line is removed corresponding to time blank
Section, even if so when the horizontal quantity that scanned by optical scanner 30 changes, shown image the most not by
Impact.Additionally, projector 1 can stably operate and be possible to prevent owing to manually adjusting optical scanner 30
The damage that horizontal frequency causes, because the horizontal frequency of optical scanner 30 is not by manual change.
Fig. 6 illustrates another illustrative embodiments according to the present invention and changes the horizontal line scanned by optical scanner
The method of quantity.
With reference to Fig. 6, when horizontal time-base is reduced to 17KHz(610 from 18KHz) time, the vertical frequency of scanning device
Rate Scanner Vsync(scanning device Vsync) reduce, and thus scanner driver 20 reduce by optical scanning
The horizontal quantity of device 30 scanning.In the exemplary embodiment, projector 1 reduces by optical scanner 30
The horizontal quantity scanned and the horizontal quantity that would correspond to the return period are maintained odd number.Such as, by light
The horizontal quantity learning scanning device 30 scanning can be reduced to N-1 from N+1.
In the exemplary embodiment, projector 1 reduce the horizontal quantity scanned by optical scanner 30 and
Would correspond to return the horizontal quantity of period and be maintained even number.Such as, optical scanner 30 level scanned
The quantity of line can be reduced to N-2 from N+2.
When horizontal time-base increases to 19KHz(620 from 18KHz) time, vertical frequency Scanner of scanning device
Vsync(scanning device Vsync) increase, and thus scanner driver 20 increase and scanned by optical scanner 30
Horizontal quantity.In the exemplary embodiment, projector 1 increases the level scanned by optical scanner 30
The quantity of line, would correspond to return the horizontal quantity of period simultaneously and is maintained odd number.Such as, by optical scanner
The horizontal quantity of 30 scannings can increase to N+1 from N-1.
In the exemplary embodiment, projector 1 increase the horizontal quantity scanned by optical scanner 30 and
Would correspond to return the horizontal quantity of period and be maintained even number.Such as, optical scanner 30 level scanned
The quantity of line can increase to N+2 from N-2.
In order to ensure scanning device vertical frequency Scanner Vsync corresponding to inputting vertical frequency, exemplary embodiment party
In formula, the present invention changes the horizontal quantity of the horizontal time-base corresponding with returning the period, simultaneously by horizontal
Quantity is maintained odd number.It is to say, by quantity n*60 changing the line for the scheduled time (such as, one second)
With the horizontal quantity for each frame of video, the present invention can by 60Hz for the described scheduled time
Quantity n*60 of line is adjusted to (N-1)+N+ (N-1)+(N+1) ... (N).Projector 1 according to the present invention will be with optics
The horizontal quantity that the return period of scanning device is corresponding is adjusted to odd number, thus can show that whole frame of video does not saves
The slightly horizontal line of frame of video.
In order to ensure scanning device vertical frequency Scanner Vsync corresponding to inputting vertical frequency, exemplary embodiment party
In formula, the present invention changes the horizontal quantity of the horizontal time-base corresponding with returning the period, simultaneously by horizontal
Quantity is maintained even number.It is to say, by quantity n*60 changing the line for the scheduled time (such as, one second)
With the horizontal quantity for each frame of video, the present invention can by 60Hz for the described scheduled time
Quantity n*60 of line is adjusted to (N+2)+(N-2)+(N+2) ... (N-2).
Optical scanning in the effectual time of Fig. 7 A illustration horizontal-drive signal according to an illustrative embodiment of the invention
The horizontal drive circulation of device；Fig. 7 B illustrates the return of horizontal-drive signal according to an illustrative embodiment of the invention
The horizontal drive circulation of optical scanner in period；Fig. 8 illustrates another illustrative embodiments according to the present invention
The horizontal drive circulation returning optical scanner in the period of horizontal-drive signal；And Fig. 9 illustrates according to the present invention's
The horizontal drive circulation returning optical scanner in the period of the horizontal-drive signal of another illustrative embodiments.
Fig. 7 A illustrates when optical scanner 30 scans N number of horizontal line light in the effectual time of horizontal-drive signal
Learn the horizontal drive circulation of scanning device 30.Here, N represents the horizontal line scanned by input level synchronizing signal.
Fig. 7 B illustrates when optical scanner 30 scans N number of horizontal line light in the return period of horizontal-drive signal
Learn the horizontal drive circulation of scanning device 30.
Fig. 8 illustrates when optical scanner 30 scans N-1 horizontal line light in the return period of horizontal-drive signal
Learn the horizontal drive circulation of scanning device 30.The quantity of the horizontal drive circulation of the optical scanner 30 in Fig. 8 is than figure
The quantity of the horizontal drive circulation of the optical scanner 30 in 7B is less.Although optical scanner 30 in figure 7b
Return to left side starting point, but optical scanner 30 returns to right side opening initial point in fig. 8, because in fig. 8
The horizontal quantity corresponding with returning the period is odd number.It is to say, whenever optical scanner 30 scan video frame
Time, the starting point of optical scanner 30 is switched to left-hand point and right-hand point.Therefore, by scan video frame not
Omit first horizontal line, can not damage frame of video with frame of display video according to the projector 1 of the present invention.
Fig. 9 illustrates when optical scanner 30 scans N+1 horizontal line light in the return period of horizontal-drive signal
Learn the horizontal drive circulation of scanning device 30.The quantity of the horizontal drive circulation of the optical scanner 30 in Fig. 9 compares Fig. 8
In optical scanner 30 horizontal drive circulation quantity bigger.Although optical scanner 30 returns in figure 7b
During to left side starting point, but optical scanner 30 returns to right side opening initial point in fig .9 because in fig .9 with
Returning horizontal quantity corresponding to period is odd number.It is to say, whenever optical scanner 30 scan video frame,
The starting point of optical scanner 30 is switched to left-hand point and right-hand point.Therefore, do not omitted by scan video frame
First horizontal line, can not damage frame of video according to the projector 1 of the present invention with frame of display video.
Therefore, although in traditional projector due to optical scanner horizontal drive circulate be maintained thus vertically with
Step signal change, but, by the horizontal quantity that scanned by optical scanner 30 of change, the present invention can be by
Verticial-sync signal locks and does not change the horizontal drive circulation of optical scanner.
Figure 10 is the flow process illustrating the method for driving optical scanner according to an illustrative embodiment of the invention
Figure.
With reference to Figure 10, when the initial scanner produced by driving signal generator 210 drives signal to be applied to optics
During scanning device 30, as the response to initial scanner driving signal, optical scanner 30 starts operation with at screen
Upper display image.Here, initial scanner can be produced based on the initial resonant frequency set to drive signal.
The sensing signal (S100) of the sensing of the operation of optical scanner 30 output instruction optical scanner 30.
Sensing signal processor 220 processes the sensing signal from optical scanner 30 output.Here, at sensing signal
Reason device 220 produces horizontal time-base and being exported by produced horizontal time-base based on this sensing signal and drives
Dynamic signal generator 210.
Driving signal generator 210 is based on the horizontal time-base exported from sensing signal processor 220 with at video
At least one in the vertical frequency of reason device 10 output, generation includes the horizontal drive signals of instruction optical scanner
The horizontal reference signal of the line information of horizontal quantity, reference clock signal and feedback scan device drive signal
(S120).
Driving signal generator 210 can be by least in produced horizontal reference signal and reference clock signal
Individual output is to adjustor 320.
It addition, produced feedback scan device driving signal is applied to optical scanner by driving signal generator 210.
Adjustor 320 produces to read based on the horizontal reference signal exported from driving signal generator 210 and enables signal
(S130).Here, the produced enable signal that reads can be exported Memory Controller 310 by adjustor 320.
Memory Controller 310 enables signal control to laser driver 40 based on reading of exporting from adjustor 320
The output timing of video data.Adjustor 320 can export from driving signal generator 210 to laser driver 40
The reference clock signal of output.
Optical scanner 30 drives signal operation according to the feedback scan device inputted from driving signal generator 210
(S140).Optical scanner 30 scans the level of the quantity by the line information instruction included at horizontal reference signal
Line.The horizontal quantity scanned by optical scanner 30 can change.In the exemplary embodiment, with return
Horizontal quantity corresponding to period can change, and is maintained odd number simultaneously.
According to projector with for driving the apparatus and method of its optical scanner, optical scanner by with video data
Verticial-sync signal synchronously drives, thus exports vertical frequency corresponding to inputting vertical frequency.Therefore, it is possible to reduce
Memory span, because need not single frame memory.Furthermore, it is possible to prevent optical scanner from damaging, because light
The horizontal frequency learning scanning device keeps uniformly.It addition, the horizontal quantity of the optical scanner corresponding with returning the period
It is controlled to be maintained in odd and even number, thus frame of video can be shown and be not damaged by.
Although embodiments of the present invention are described by the multiple illustrative embodiments by reference to the present invention, but
It is, it should be appreciated that those skilled in the art are many in can finding out the spirit and scope of the principle falling into the disclosure
Other modification individual and embodiment.More specifically, can be at the model of the disclosure, accompanying drawing and appended claims
Enclose the interior building block to this theme combination unit and/device carries out various conversion and amendment.Except to building block and/
Or the conversion of device and amendment outside, those skilled in the art are also apparent from by substituting use.
Claims (15)
1. including a projector for the optical scanner of scanning image on screen, described projector includes:
Described optical scanner；
Video processor, described video processor vertically synchronizes letter for receive video data and described video data
Number；And
Scanner driver, described scanner driver is for controlling the water of the horizontal drive signals of described optical scanner
The quantity of horizontal line changes based on the described verticial-sync signal received,
Wherein, described scanner driver includes:
Sensing signal processor, described sensing signal processor is for receiving the sense of the operation representing described optical scanner
The sensing signal surveyed, and produce the horizontal frequency phase with described optical scanner based on the described sensing signal received
Corresponding horizontal time-base；And
Driving signal generator, described driving signal generator is for producing bag based on the described horizontal time-base produced
Include the horizontal reference of the line information that the horizontal quantity of the horizontal drive signals to described optical scanner indicates
Signal, reference clock signal and for driving at least one in the scanner drive signal of described optical scanner,
Wherein, when described horizontal time-base reduces, described driving signal generator reduces described horizontal described
Quantity, and
Wherein, when described horizontal time-base increases, described driving signal generator increases described horizontal described
Quantity.
Projector the most according to claim 1, wherein, described scanner driver is swept based on from described optics
Retouch the sensing signal generation horizontal time-base that device receives, and include based on the described horizontal time-base generation produced
The line information that the described horizontal described quantity of the described horizontal drive signals of described optical scanner is indicated
Horizontal reference signal, reference clock signal and for driving in the scanner drive signal of described optical scanner extremely
Few one.
Projector the most according to claim 1, wherein, described video processor is believed based on described horizontal reference
Number produce and to enable signal for the reading of the output timing of described video data controlling to receive.
Projector the most according to claim 3, described projector also includes:
Lasing light emitter, described lasing light emitter is for launching the light beam for showing described video data；And
Laser driver, described laser driver is for regarding described in enable signal output based on according to described reading
The described reference clock signal of frequency evidence and generation produces the laser drive signal for driving described lasing light emitter.
Projector the most according to claim 4, wherein, described video processor includes:
Adjustor, described adjustor enables signal for producing described reading based on the described horizontal reference signal produced；
And
Memory Controller, described Memory Controller is for enabling the signal described video data of control according to described reading
Output is to described laser driver.
Projector the most according to claim 1, wherein, described video processor includes receiving for storage
The memorizer of frame of video, and described memorizer has the capacity less than a frame of video.
Projector the most according to claim 1, wherein, described video processor caches described video data and makees
For having the data of the size less than frame of video.
Projector the most according to claim 1, wherein, described scanner driver controls to make and described light
The horizontal quantity that the return period of scanning device is corresponding is maintained odd number or even number.
Projector the most according to claim 1, wherein, the scanning of described optical scanner is referred to by described line information
The horizontal line of the described quantity shown.
Projector the most according to claim 1, wherein, the described horizontal drive signals of described optical scanner
Described horizontal described quantity change.
11. projectors according to claim 1, described projector also includes: adjustor, and described adjustor is used
In the reading producing the output timing being used for the video data that control receives based on the described horizontal reference signal produced
Enable signal.
12. projectors according to claim 1, wherein, described sensing signal processor includes for from described
Sensing signal removes the difference amplifier of noise.
13. projectors according to claim 1, wherein, described driving signal generator includes first memory
And second memory, described first memory is used for storing horizontal-drive signal, and described second memory is used for storing perpendicular
Straight synchronizing signal, described horizontal-drive signal and described verticial-sync signal are the letters for driving described optical scanner
Number.
14. projectors according to claim 1, wherein, described driving signal generator includes:
First digital to analog converter, described first digital to analog converter is for being converted to analogue signal by horizontal-drive signal；With
And
Second digital to analog converter, described second digital to analog converter for being converted to simulation letter by described verticial-sync signal
Number.
15. projectors according to claim 1, wherein, described driving signal generator includes:
First wave filter, described first wave filter is for filtering the high fdrequency component of horizontal-drive signal；And
Second wave filter, described second wave filter is for filtering the high fdrequency component of described verticial-sync signal.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020120001712A KR101969347B1 (en) | 2012-01-05 | 2012-01-05 | Projector, apparatus and method for driving light scanner |
| KR10-2012-0001712 | 2012-01-05 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103200374A CN103200374A (en) | 2013-07-10 |
| CN103200374B true CN103200374B (en) | 2016-11-30 |
Family
ID=
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010107071A1 (en) * | 2009-03-18 | 2010-09-23 | ブラザー工業株式会社 | Image display device |
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010107071A1 (en) * | 2009-03-18 | 2010-09-23 | ブラザー工業株式会社 | Image display device |
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