CN109600592A - Generation method, projecting subassembly, projector and the storage medium of line synchronising signal - Google Patents
Generation method, projecting subassembly, projector and the storage medium of line synchronising signal Download PDFInfo
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- CN109600592A CN109600592A CN201811558986.9A CN201811558986A CN109600592A CN 109600592 A CN109600592 A CN 109600592A CN 201811558986 A CN201811558986 A CN 201811558986A CN 109600592 A CN109600592 A CN 109600592A
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- line synchronising
- laser
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/12—Picture reproducers
- H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
- H04N9/3141—Constructional details thereof
- H04N9/315—Modulator illumination systems
- H04N9/3161—Modulator illumination systems using laser light sources
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/12—Picture reproducers
- H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
- H04N9/3141—Constructional details thereof
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/12—Picture reproducers
- H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
- H04N9/3141—Constructional details thereof
- H04N9/315—Modulator illumination systems
- H04N9/3155—Modulator illumination systems for controlling the light source
Abstract
The invention discloses a kind of generation methods of line synchronising signal, comprising the following steps: the sinusoidal signal received is filtered amplification, and is converted to the first pulse signal；According to the pulse width and pulse center point of the high level of first pulse signal, the second pulse signal is generated；The delay process that preset time is carried out to second pulse signal, so that the rising edge of second pulse signal is corresponding with the peak value of the sinusoidal signal；The period for obtaining row point bright pixel generates line synchronising signal according to the period of the rising edge of second pulse signal after delay process and row point bright pixel.The invention also discloses a kind of laser projection component, laser-projector and computer readable storage mediums.The present invention efficiently solves the sinusoidal signal that receives because of frequency variation or amplitude variation, and to generating the problem of line synchronising signal impacts.
Description
Technical field
The present invention relates to data signal communication field more particularly to a kind of generation methods of line synchronising signal, laser projection
Component, laser-projector and computer readable storage medium.
Background technique
With the development of shadow casting technique, laser beam flying projector (LBS) is due to simple with structure, small in size, optical path
It is lost that small, low in energy consumption, Color Range is wide, contrast is big, high resolution, the advantages that without focusing, the increasingly blueness by market
It looks at.
In existing Color Laser Projection Technology, need three primary colors laser beam through the reflecting mirror of MEMS (MEMS)
It projects in light curtain and is imaged, wherein the sinusoidal signal obtained after driving reflecting mirror using horizontal drive signals is as laser
The line synchronising signal of device, generally, due to the sine wave signal that the line synchronising signal of laser uses, frequency and MEMS ontology
Resonant frequency is consistent, this will lead to line synchronising signal and is easy to be influenced by the phase shift of signal processing circuit, MEMS resonance state, especially
It is the resonance state influence maximum of MEMS, and in the same laser projection system, the resonant frequency of possible each MEMS
It is inconsistent, and the MEMS resonant frequency point that works long hours will appear movement, these can all cause MEMS resonance state to change, thus
It is synchronous with the row that laser is lighted to influence MEMS movement position.
Summary of the invention
The main purpose of the present invention is to provide a kind of generation method of line synchronising signal, laser projection component, laser to throw
Shadow instrument and computer readable storage medium, efficiently solve the sinusoidal signal that receives because of frequency variation or amplitude variation,
And the problem of generation line synchronising signal is impacted.
To achieve the above object, the present invention provides a kind of generation method of line synchronising signal, the life of the line synchronising signal
At method the following steps are included:
The sinusoidal signal received is filtered amplification, and is converted to the first pulse signal；
According to the pulse width and pulse center point of the high level of first pulse signal, the second pulse signal is generated；
The delay process that preset time is carried out to second pulse signal, so that the rising edge of second pulse signal
It is corresponding with the peak value of the sinusoidal signal；
The period for obtaining row point bright pixel, according to the rising edge and the row of second pulse signal after delay process
In the period of point bright pixel, generate line synchronising signal.
Preferably, the sinusoidal signal that will be received is filtered amplification, and the step of being converted to the first pulse signal
Include:
The sinusoidal signal received is filtered amplification, to increase the amplitude of the sinusoidal signal；
Reference voltage is obtained, analog-to-digital conversion is carried out to the sinusoidal signal after filter and amplification according to the reference voltage,
Generate peak value first pulse signal equal with the reference voltage.
Preferably, the pulse width and pulse center point of the high level according to first pulse signal generates the
The step of two pulse signals includes:
Obtain the pulse width and pulse center point of each high level of first pulse signal；
Half pulse width mean value is calculated according to the pulse width of each high level；
Generation rising edge is overlapped with the pulse center point of the high level and the pulse width of high level is equal to described half
Second pulse signal of pulse width mean value.
Preferably, the step of half pulse width mean value is calculated in the pulse width according to each high level packet
It includes:
The pulse width of each high level is subjected to read group total, and mean value is calculated according to summed result, with
To pulse width mean value；
By filtering algorithm, using half numerical value of the pulse width mean value as the half pulse width mean value.
Preferably, the generation method of the line synchronising signal is applied to laser projection component, the laser projection component packet
Lasers and mirrors are included, the sinusoidal signal that will be received is filtered amplification, and is converted to the step of the first pulse signal
Before rapid, further includes:
The horizontal position signal of the reflecting mirror that the reflecting mirror will obtain after horizontal adjustment, as it is described just
String signal；
It is described according to the rising edge of second pulse signal after delay process and the period of row point bright pixel, it is raw
After the step of line synchronising signal, further includes:
The frame synchronizing signal prestored and viewdata signal are obtained, according to frame synchronizing signal letter synchronous with the row
Number, control the laser and emit laser beam corresponding with described image data-signal to the reflecting mirror, with reflective projection at
Picture.
Preferably, the horizontal position confidence by the reflecting mirror for obtain after horizontal adjustment to the reflecting mirror
Number, the step of as the sinusoidal signal before, further includes:
When receiving described image data-signal, reflection driving signal is generated according to described image data-signal, and
Generate frame synchronizing signal corresponding with the reflection driving signal；
Using the position of the reflection driving signal adjustment reflecting mirror, and obtain the position signal of the reflecting mirror, wherein
The position signal includes horizontal position signal and vertical position signal.
Preferably, the position using the reflection driving signal adjustment reflecting mirror, and obtain the position of the reflecting mirror
After the step of confidence, further includes:
Delay correction process is carried out to the frame synchronizing signal, so that the frame synchronizing signal and the position signal pair
The frame synchronizing signal answered, and the frame synchronizing signal is prestored as described in.
To achieve the above object, the present invention also provides a kind of laser projection components, and the laser projection component includes laser
Device, MEMS MEMS, filter amplifier and voltage comparator, wherein the MEMS have reflecting mirror, the reflecting mirror with
The filter amplifier is connected, and the filter amplifier is connected with the voltage comparator, and the voltage comparator swashs with described
Light device is connected, and the filter amplifier is used to the sinusoidal signal received being filtered amplification, and the voltage comparator is used for
It is pulse signal that the amplified sinusoidal signal, which will be filtered, and carry out analog-to-digital conversion, and the laser projection component includes:
The laser projection component includes memory, processor and is stored on the memory and can be in the processor
The generation program of the line synchronising signal of upper operation is realized such as when the generation program of the line synchronising signal is executed by the processor
The step of generation method of above-mentioned line synchronising signal.
To achieve the above object, the present invention also provides a kind of laser-projector, the laser-projector includes as described above
Laser projection component, the laser-projector includes:
The laser-projector includes memory, processor and is stored on the memory and can be on the processor
The generation program of the line synchronising signal of operation is realized as above when the generation program of the line synchronising signal is executed by the processor
The step of stating the generation method of line synchronising signal.
To achieve the above object, the present invention also provides a kind of computer readable storage medium, the computer-readable storages
It is stored with the generation program of line synchronising signal on medium, is realized such as when the generation program of the line synchronising signal is executed by processor
The step of generation method of above-mentioned line synchronising signal.
Generation method, laser projection component, laser-projector and the computer of line synchronising signal provided by the invention can
Storage medium is read, the sinusoidal signal received is filtered amplification, and be converted to the first pulse signal；According to first arteries and veins
The pulse width and pulse center point of the high level of signal are rushed, the second pulse signal is generated；Second pulse signal is carried out
The delay process of preset time, so that the rising edge of second pulse signal is corresponding with the peak value of the sinusoidal signal；It obtains
The period of row point bright pixel, according to the week of the rising edge of second pulse signal after delay process and row point bright pixel
Phase generates line synchronising signal.In this way, by the way that the sinusoidal signal of MEMS MEMS output feedback is passed through filter and amplification and mould
The line synchronising signal for the horizontal direction lighted after number conversion as control laser, avoids driving circuit in this way and MEMS resonates
Phase shift caused by state influences, and efficiently solves the sinusoidal signal received because of frequency variation or amplitude variation, and to generation
The problem of line synchronising signal impacts, so that real-time, accurate and stable line synchronising signal is obtained, to ensure that each throwing
Shadow mould group can normal synchronized work.
Detailed description of the invention
Fig. 1 is the hardware running environment schematic diagram for the embodiment terminal that the embodiment of the present invention is related to；
Fig. 2 is the flow diagram of the generation method first embodiment of line synchronising signal of the present invention；
Fig. 3 is the flow diagram of the generation method second embodiment of line synchronising signal of the present invention；
Fig. 4 is the flow diagram of the generation method 3rd embodiment of line synchronising signal of the present invention；
Fig. 5 is the flow diagram of the generation method fourth embodiment of line synchronising signal of the present invention；
Fig. 6 is the flow diagram of the 5th embodiment of generation method of line synchronising signal of the present invention；
Fig. 7 is the exemplary diagram of an embodiment of the generation method of line synchronising signal of the present invention.
The embodiments will be further described with reference to the accompanying drawings for the realization, the function and the advantages of the object of the present invention.
Specific embodiment
It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not intended to limit the present invention.
The present invention provides a kind of generation method of line synchronising signal, passes through the sine for feeding back the output of MEMS MEMS
The line synchronising signal of horizontal direction that signal is lighted after filter and amplification and analog-to-digital conversion as control laser, in this way it is avoided that
Phase shift caused by driving circuit and MEMS resonance state influences, efficiently solve the sinusoidal signal that receives because of frequency variation or
The variation of person's amplitude, and to the problem of line synchronising signal impacts is generated, so that obtaining real-time, accurate letter synchronous with stable row
Number, to ensure that each projective module group can normal synchronized work.
As shown in Figure 1, Fig. 1 is the hardware running environment schematic diagram for the embodiment terminal that the embodiment of the present invention is related to；
The terminal of that embodiment of the invention can be laser projection component, be also possible to laser-projector.
As shown in Figure 1, the terminal may include: processor 1001, such as CPU, memory 1002, communication bus 1003.
Wherein, communication bus 1003 is for realizing the connection communication between each building block in the terminal.Memory 1002 can be height
Fast RAM memory is also possible to stable memory (non-volatile memory), such as magnetic disk storage.Memory
1002 optionally can also be the storage device independently of aforementioned processor 1001.
It will be understood by those skilled in the art that the structure of terminal shown in Fig. 1 was not constituted to end of the embodiment of the present invention
The restriction at end may include perhaps combining certain components or different component layouts than illustrating more or fewer components.
As shown in Figure 1, as the life that in a kind of memory 1002 of computer storage medium may include line synchronising signal
At program.
In terminal shown in Fig. 1, processor 1001 can be used for calling the line synchronising signal stored in memory 1002
Generation program, and execute following operation:
The sinusoidal signal received is filtered amplification, and is converted to the first pulse signal；
According to the pulse width and pulse center point of the high level of first pulse signal, the second pulse signal is generated；
The delay process that preset time is carried out to second pulse signal, so that the rising edge of second pulse signal
It is corresponding with the peak value of the sinusoidal signal；
The period for obtaining row point bright pixel, according to the rising edge and the row of second pulse signal after delay process
In the period of point bright pixel, generate line synchronising signal.
Further, processor 1001 can call the generation program of the line synchronising signal stored in memory 1002, also
Execute following operation:
The sinusoidal signal received is filtered amplification, to increase the amplitude of the sinusoidal signal；
Reference voltage is obtained, analog-to-digital conversion is carried out to the sinusoidal signal after filter and amplification according to the reference voltage,
Generate peak value first pulse signal equal with the reference voltage.
Further, processor 1001 can call the generation program of the line synchronising signal stored in memory 1002, also
Execute following operation:
Obtain the pulse width and pulse center point of each high level of first pulse signal；
Half pulse width mean value is calculated according to the pulse width of each high level；
Generation rising edge is overlapped with the pulse center point of the high level and the pulse width of high level is equal to described half
Second pulse signal of pulse width mean value.
Further, processor 1001 can call the generation program of the line synchronising signal stored in memory 1002, also
Execute following operation:
The pulse width of each high level is subjected to read group total, and mean value is calculated according to summed result, with
To pulse width mean value；
By filtering algorithm, using half numerical value of the pulse width mean value as the half pulse width mean value.
Further, processor 1001 can call the generation program of the line synchronising signal stored in memory 1002, also
Execute following operation:
The horizontal position signal of the reflecting mirror that the reflecting mirror will obtain after horizontal adjustment, as it is described just
String signal；
It is described according to the rising edge of second pulse signal after delay process and the period of row point bright pixel, it is raw
After the step of line synchronising signal, further includes:
The frame synchronizing signal prestored and viewdata signal are obtained, according to frame synchronizing signal letter synchronous with the row
Number, control the laser and emit laser beam corresponding with described image data-signal to the reflecting mirror, with reflective projection at
Picture.
Further, processor 1001 can call the generation program of the line synchronising signal stored in memory 1002, also
Execute following operation:
When receiving described image data-signal, reflection driving signal is generated according to described image data-signal, and
Generate frame synchronizing signal corresponding with the reflection driving signal；
Using the position of the reflection driving signal adjustment reflecting mirror, and obtain the position signal of the reflecting mirror, wherein
The position signal includes horizontal position signal and vertical position signal.
Further, processor 1001 can call the generation program of the line synchronising signal stored in memory 1002, also
Execute following operation:
Delay correction process is carried out to the frame synchronizing signal, so that the frame synchronizing signal and the position signal pair
The frame synchronizing signal answered, and the frame synchronizing signal is prestored as described in.
Referring to Fig. 2, in one embodiment, the generation method of the line synchronising signal includes:
Step S10, the sinusoidal signal received is filtered amplification, and is converted to the first pulse signal.
In the present embodiment, the terminals such as laser reflection projecting subassembly, laser reflection optical projection system, laser reflection projector can
To receive the viewdata signal for carrying out self imaging input interface.Certainly, terminal can cache reception by data buffering module
The image data arrived.It should be noted that image input interface is used to receive the image data of the outputs such as PC machine, set-top box, and
Carry out image real time transfer.
The present embodiment terminal may include laser and MEMS MEMS, wherein MEMS under the control of terminal,
The reflecting mirror of MEMS can be swung around horizontally and vertically two axis；Laser for control RGB (red, green,
Blue) the brightness of three color laser, by the pixel data of the image received from image input interface, simultaneously with tri- color laser of RGB
A pixel color is lighted and synthesized, to generate laser beam corresponding with viewdata signal, and radiating laser beams are arrived
The reflecting mirror of MEMS is imaged onto corresponding light curtain with reflective projection.
Viewdata signal is received in terminal, or gets the viewdata signal being buffered in data buffering module
When, MEMS controller can be controlled according to viewdata signal, generated for driving the anti-of MEMS adjustment transmitting mirror angle position
Driving signal is penetrated, and generates frame synchronizing signal corresponding with reflection driving signal.
After generating reflection driving signal, according to the reflector alignment reflection angle position of reflection driving signal control MEMS
It sets, correspondingly, is operated according to the vertical driving signal driving reflecting mirror in reflection driving signal in vertical direction, driven according to reflection
Vertical driving signal driving reflecting mirror in dynamic signal is in horizontal antiport.Pressure sensor on MEMS ontology is in reflecting mirror
After adjusting good position, the meeting corresponding position signal of feedback output reflecting mirror, the position signal includes vertical position signal and water
Flat position signal, wherein vertical position signal is that the pressure sensor on MEMS ontology feeds back MEMS out in vertical direction
Position signal, the position strict conformance with reflecting mirror vertical movement；Horizontal position signal is the pressure sensor on MEMS ontology
Feed back MEMS position signal in the horizontal direction out, the position strict conformance with reflecting mirror horizontal movement.It should be noted that
The horizontal position signal is sinusoidal waveform signal, i.e., the described horizontal position signal can be exactly the sinusoidal signal.
The present embodiment terminal can also include filter amplifier and voltage comparator, wherein the filter amplifier is used for
The sinusoidal signal received is filtered amplification, the voltage comparator will be for that will be filtered the amplified sinusoidal letter
Number carry out analog-to-digital conversion be pulse signal.
It specifically, is the horizontal position confidence that MEMS ontology feedback output moves in the horizontal direction referring to Fig. 7, sinusoidal signal V0
Number, the sinusoidal signal V0 is produced by the piezoelectric transducer on MEMS ontology according to the horizontal drive signals in reflection driving signal
It is raw.In the sinusoidal signal V0 for receiving MEMS feedback output, by filter amplifier or filter and amplification module to it is described just
String signal V0 is filtered amplification, to increase the amplitude of the sinusoidal signal V0, so that the voltage magnitude of sinusoidal signal is in demand
In range, so that a light laser can be enough according to the line synchronising signal that the sinusoidal signal generates.It should be noted that
Being filtered amplified sinusoidal signal V1 and original sinusoidal signal V0 has certain phase-shift value.
Amplified sinusoidal signal V1, which will be filtered, by voltage comparator or voltage comparator circuit carries out modulus turn
It changes, specifically, obtains reference voltage u, it is reversed defeated in the amplified sinusoidal signal V1 of the in-phase end input filter of voltage comparator
Entering end input is benchmark voltage u.Sinusoidal signal V1 after filter and amplification can obtain peak value equal to benchmark after over-voltage comparator
First pulse signal V2 of voltage, since the portion waveshape that the sinusoidal signal V1 after filter and amplification is greater than reference voltage is symmetrical, because
No matter the peak value size of the sinusoidal signal V1 after this filter and amplification, the high level of the first pulse signal V2 and/or it is low level in
Heart point is overlapped with the peak point of the sinusoidal signal V1 after filter and amplification.
Step S20, according to the pulse width and pulse center point of the high level of first pulse signal, the second arteries and veins is generated
Rush signal.
In the present embodiment, laser or laser control system may include laser controller.Referring to Fig. 7, according to described
The pulse width and pulse center point of the first each high level of pulse signal V2, through laser controller, in laser controller
Portion generates the pulse that a rising edge is overlapped with the pulse center point with the pulse center point of the high level of the first pulse signal V2
Signal, while half pulse width mean value is calculated according to the pulse width of each high level of the first pulse signal V2, with
The pulse width for the pulse signal that the half pulse width mean value is overlapped as rising edge with pulse center point, i.e. generation rising edge
It is overlapped with the pulse center point of the high level of the first pulse signal V2, and pulse width is equal to the arteries and veins of the half pulse width mean value
Signal is rushed, using the pulse signal of generation as the second pulse signal V3.The rising edge of the second pulse signal V3 and it is described into
The peak point time consistency of sinusoidal signal V1 after row filter and amplification.
It should be noted that the half pulse width mean value is the half of the mean value of the pulse width of the first pulse signal V2
Value.In this way, greatly reducing the influence that noise generates the second pulse signal V3.
Step S30, the delay process that preset time is carried out to second pulse signal, so that second pulse signal
Rising edge it is corresponding with the peak value of the sinusoidal signal.
Referring to Fig. 7, there is certain phase-shift value due to being filtered amplified sinusoidal signal V1 and original sinusoidal signal V0,
Therefore the obtained pulse signal of analog-to-digital conversion is being carried out according to the sinusoidal signal V1 after filter and amplification, it is opposite with former sinusoidal signal V0
With certain time delay.And because the hardware handles circuit of MEMS piezoelectricity feedback signal is fixed, so that sinusoidal signal V0 is by electricity
Phase shift when road is handled is fixed, and therefore, can first according to sinusoidal signal V0 and be filtered between amplified sinusoidal signal V1
Phase-shift value, to second pulse signal carry out preset time delay process so that the second pulse signal V4's is upper
It rises and is overlapped along corresponding with the peak point of the sinusoidal signal V0.
For example, when sinusoidal signal V0 and the time delay being filtered between amplified sinusoidal signal V1 are T, it is correspondingly, right
Second pulse signal V3 carries out the delay process of T time, to ensure that the second pulse signal V4's after carrying out delay process
The peak point of the position signal of rising edge and MEMS ontology, i.e., the described sinusoidal signal V0 is overlapped.
Step S40, the period for obtaining row point bright pixel, according to the rising edge of second pulse signal after delay process
With the period of the row point bright pixel, line synchronising signal is generated.
The period of one sinusoidal signal V0 corresponds to the pixel period of integral multiple, wherein pixel period includes that row lights picture
The period in the period of element and the non-lit up pixel of row, the period of row point bright pixel correspond to the corresponding required point of pixel column that a line is shown
The quantity of bright pixel, and the period of the non-lit up pixel of row corresponds in the pixel column that a line is shown, in addition to the picture for needing to light
Pixel except element.
Referring to Fig. 7, for the second pulse signal V4 after delay process when being in rising edge, corresponding triggering generates two rows
Lock-out pulse, the pulse width of the horizontal synchronizing pulse of generation be equal to the row point bright pixel period and pulse center point with
The rising edge or failing edge of sinusoidal signal V0 is corresponding to be overlapped, to obtain line synchronising signal V5.
It should be noted that since the rising edge of the second pulse signal V4 after delay process is with the sinusoidal signal V0's
Peak value is corresponding, and the rising edge of the second pulse signal V4 after each delay process can trigger two horizontal synchronizing pulses, wherein
The pixel of the corresponding control one-row pixels row of each horizontal synchronizing pulse is lighted, therefore, for the picture for lighting a pixel column
Element is equal, and each pulse center point of line synchronising signal V5 needs weight corresponding with the rising edge of sinusoidal signal V0 or failing edge
It closes, i.e., in the period of one sinusoidal signal, corresponds to the ignition period of two row pixel columns.
For example, correspond to 3000 pixel periods in the period of a sinusoidal signal, the corresponding pixel of every row pixel column
Period is 1500, and when the period for a bright pixel of being expert at is 1000, on each horizontal synchronizing pulse both sides, correspondence does not light picture
The period of element is each 250, i.e. the corresponding period for not putting bright pixel is 500 between two horizontal synchronizing pulses.
In one embodiment, the sinusoidal signal received is filtered amplification, and is converted to the first pulse signal；According to
The pulse width and pulse center point of the high level of first pulse signal generate the second pulse signal；To second arteries and veins
The delay process that signal carries out preset time is rushed, so that the peak value of the rising edge of second pulse signal and the sinusoidal signal
It is corresponding；The period for obtaining row point bright pixel, according to the rising edge and row point of second pulse signal after delay process
The period of bright pixel generates line synchronising signal.In this way, by the way that MEMS MEMS is exported the sinusoidal signal fed back through filtering
The line synchronising signal for the horizontal direction lighted after wave amplification and analog-to-digital conversion as control laser, avoids driving circuit in this way
It is influenced with phase shift caused by MEMS resonance state, efficiently solves the sinusoidal signal received because frequency variation or amplitude become
The problem of changing, and generation line synchronising signal impacted, so that real-time, accurate and stable line synchronising signal is obtained, thus
It ensure that each projective module group can normal synchronized work.
In a second embodiment, described to receive just as shown in figure 3, on the basis of above-mentioned embodiment shown in Fig. 2
String signal is filtered amplification, and the step of being converted to the first pulse signal includes:
Step S50, the sinusoidal signal received is filtered amplification, to increase the amplitude of the sinusoidal signal.
Step S51, reference voltage is obtained, mould is carried out to the sinusoidal signal after filter and amplification according to the reference voltage
Number conversion generates peak value first pulse signal equal with the reference voltage.
In the present embodiment, referring to Fig. 7, sinusoidal signal V0 is the horizontal position that MEMS ontology feedback output moves in the horizontal direction
Confidence number, the sinusoidal signal V0 is by the piezoelectric transducer on MEMS ontology according to the horizontal drive signals in reflection driving signal
It generates.In the sinusoidal signal V0 for receiving MEMS feedback output, by filter amplifier or filter and amplification module to described
Sinusoidal signal V0 is filtered amplification, to increase the amplitude of the sinusoidal signal V0, so that the voltage magnitude of sinusoidal signal is needing
It asks in range, so that a light laser can be enough according to the line synchronising signal that the sinusoidal signal generates.It needs to illustrate
It is to be filtered amplified sinusoidal signal V1 and original sinusoidal signal V0 there is certain phase-shift value.
Amplified sinusoidal signal V1, which will be filtered, by voltage comparator or voltage comparator circuit carries out modulus turn
It changes, specifically, obtains reference voltage u, it is reversed defeated in the amplified sinusoidal signal V1 of the in-phase end input filter of voltage comparator
Entering end input is benchmark voltage u.Sinusoidal signal V1 after filter and amplification can obtain peak value equal to benchmark after over-voltage comparator
First pulse signal V2 of voltage, since the portion waveshape that the sinusoidal signal V1 after filter and amplification is greater than reference voltage is symmetrical, because
No matter the big peak value size of sinusoidal signal V1 after this filter and amplification, the high level of the first pulse signal V2 and/or it is low level in
Heart point is overlapped with the peak point of the sinusoidal signal V1 after filter and amplification.
In one embodiment, the sinusoidal signal received is filtered amplification, to increase the sinusoidal signal
Amplitude；Reference voltage is obtained, analog-to-digital conversion is carried out to the sinusoidal signal after filter and amplification according to the reference voltage, is generated
Peak value first pulse signal equal with the reference voltage.The edge of pulse only is generated with voltage comparator in this way, avoiding
Along when being used as synchronization signal, because of the amplitude variation of feedback signal, projector mould group feedback signal amplitude is different or drives MEMS
Variation of resonant frequency (resonant frequency of each MEMS is variant, and resonant frequency point will appear offset when MEMS works long hours)
And cause row synchronous abnormality.
In the third embodiment, described according to described as shown in figure 4, on the basis of the embodiment of above-mentioned Fig. 2 to Fig. 3
The pulse width and pulse center point of the high level of one pulse signal, generate the second pulse signal the step of include:
Step S60, the pulse width and pulse center point of each high level of the first pulse signal are obtained.
Step S61, half pulse width mean value is calculated according to the pulse width of each high level.
Step S62, rising edge is generated to be overlapped with the pulse center point of the high level and the pulse width of high level etc.
In second pulse signal of the half pulse width mean value.
In the present embodiment, in the present embodiment, laser or laser control system may include laser controller.Reference
Fig. 7, according to the pulse width and pulse center point of each high level of the first pulse signal V2, by laser controller,
A rising edge and the pulse center are generated with the pulse center point of the high level of the first pulse signal V2 inside laser controller
The pulse signal that point is overlapped, while half pulse is calculated according to the pulse width of each high level of the first pulse signal V2
Width mean value, the pulse width for the pulse signal being overlapped using the half pulse width mean value as rising edge with pulse center point,
It generates rising edge to be overlapped with the pulse center point of the high level of the first pulse signal V2, and pulse width is equal to half pulse
The pulse signal of width mean value, using the pulse signal of generation as the second pulse signal V3.The second pulse signal V3's is upper
Rise edge and the peak point time consistency for being filtered amplified sinusoidal signal V1.
Specifically, each by clock signal counting the first pulse signal V2 of high speed inside control laser controller
The pulse width of high level carries out read group total, and calculates mean value according to summed result, to obtain first pulse signal
The mean value of the pulse width of each high level of V2, then by filtering algorithm, using half numerical value of the pulse width mean value as
Half pulse width mean value.
The second arteries and veins that rising edge is overlapped with the pulse center point of the high level of the first pulse signal V2 is generated in this way, realizing
Rush signal V3, wherein the pulse width of the high level of the second pulse signal V3 is equal to the half pulse width mean value, i.e. the second arteries and veins
Rush signal V3 pulse width be equal to first all pulse widths of pulse signal V2 mean value half numerical value.
In one embodiment, the pulse width and pulse center of each high level of the first pulse signal are obtained
Point；Half pulse width mean value is calculated according to the pulse width of each high level；Generate rising edge and the high level
Pulse center point be overlapped and high level pulse width be equal to the half pulse width mean value second pulse believe
Number.In this way, realizing the noise reduction inside processing circuit by repeatedly counting the filtering algorithm being averaged, greatly reducing and make an uproar
The influence that sound generates the second pulse signal V3.
In the fourth embodiment, as shown in figure 5, on the basis of the embodiment of above-mentioned Fig. 2 to Fig. 4, the line synchronising signal
Generation method be applied to laser projection component, the laser projection component includes lasers and mirrors, described to receive
Sinusoidal signal be filtered amplification, and before the step of being converted to the first pulse signal, further includes:
Step S70, by the horizontal position signal for the reflecting mirror for obtain after horizontal adjustment to the reflecting mirror, make
For the sinusoidal signal.
It is described according to the rising edge of second pulse signal after delay process and the period of row point bright pixel, it is raw
After the step of line synchronising signal, further includes:
Step S80, the frame synchronizing signal prestored and viewdata signal are obtained, according to the frame synchronizing signal and the row
Synchronization signal controls the laser and emits laser beam corresponding with described image data-signal to the reflecting mirror, with reflection
Projection imaging.
In the present embodiment, viewdata signal is received in terminal, or get and be buffered in data buffering module
When viewdata signal, MEMS controller can be controlled according to viewdata signal, generated for driving MEMS to adjust transmitting mirror
The reflection driving signal of angle position, and generate frame synchronizing signal corresponding with reflection driving signal.
After generating reflection driving signal, according to the reflector alignment reflection angle position of reflection driving signal control MEMS
It sets, correspondingly, is operated according to the vertical driving signal driving reflecting mirror in reflection driving signal in vertical direction, driven according to reflection
Vertical driving signal driving reflecting mirror in dynamic signal is in horizontal antiport.Pressure sensor on MEMS ontology is in reflecting mirror
After adjusting good position, the meeting corresponding position signal of feedback output reflecting mirror, the position signal includes vertical position signal and water
Flat position signal, wherein vertical position signal is that the pressure sensor on MEMS ontology feeds back MEMS out in vertical direction
Position signal, the position strict conformance with reflecting mirror vertical movement；Horizontal position signal is the pressure sensor on MEMS ontology
Feed back MEMS position signal in the horizontal direction out, the position strict conformance with reflecting mirror horizontal movement.
It should be noted that the horizontal position signal is sinusoidal waveform signal, the horizontal position signal can be exactly
The sinusoidal signal is made that is, by the horizontal position signal for the reflecting mirror for obtain after horizontal adjustment to the reflecting mirror
For the sinusoidal signal.
Terminal is according to viewdata signal, frame synchronizing signal, and the line synchronising signal generated according to horizontal position signal,
It controls laser and lights Pixel Information corresponding with viewdata signal with three primary colors laser, and extremely by the radiating laser beams of generation
It has adjusted on the reflecting mirror of angle position, has been imaged onto light curtain with reflective projection, to realize that image information and MEMS operate
Synchronization, export stable image information.It should be noted that the frame synchronizing signal prestored, can be and carry out delay school
Frame synchronizing signal that just treated.
It should be noted that the laser can be laser assembly, it is also possible to Optical Maser System, the laser
It may include the laser driven module for converting digital signals into analog signal.
In one embodiment, by the horizontal position confidence for the reflecting mirror for obtain after horizontal adjustment to the reflecting mirror
Number, as the sinusoidal signal, the frame synchronizing signal prestored and viewdata signal are obtained, according to the frame synchronizing signal and institute
Line synchronising signal is stated, the laser is controlled and emits laser beam corresponding with described image data-signal to the reflecting mirror, with
Reflective projection imaging.In this way, by realizing the line synchronising signal of laser reflection projection and the synchronously control of frame synchronizing signal, thus
It is synchronous to realize that every frame projected picture pixel column corresponding with every frame projected picture is shown, ensure that linking up for projected image is defeated
Out.
In the 5th embodiment, as shown in fig. 6, on the basis of the embodiment of above-mentioned Fig. 2 to Fig. 5, it is described will be to described anti-
Penetrate mirror and carry out the horizontal position signal of the reflecting mirror obtained after horizontal adjustment, the step of as the sinusoidal signal before,
Further include:
Step S90, when receiving described image data-signal, reflection driving letter is generated according to described image data-signal
Number, and generate frame synchronizing signal corresponding with the reflection driving signal.
Step S91, using the position of the reflection driving signal adjustment reflecting mirror, and the position letter of the reflecting mirror is obtained
Number, wherein the position signal includes horizontal position signal and vertical position signal.
Step S92, delay correction process is carried out to the frame synchronizing signal, so that the frame synchronizing signal and the position
Signal is corresponding, and the frame synchronizing signal that the frame synchronizing signal is prestored as described in.
In the present embodiment, viewdata signal is received in terminal, or get and be buffered in data buffering module
When viewdata signal, MEMS controller can be controlled according to viewdata signal, generated for driving MEMS to adjust transmitting mirror
The reflection driving signal of angle position, and generate frame synchronizing signal corresponding with reflection driving signal.
After generating reflection driving signal, according to the reflector alignment reflection angle position of reflection driving signal control MEMS
It sets, correspondingly, is operated according to the vertical driving signal driving reflecting mirror in reflection driving signal in vertical direction, driven according to reflection
Vertical driving signal driving reflecting mirror in dynamic signal is in horizontal antiport.Pressure sensor on MEMS ontology is in reflecting mirror
After adjusting good position, the meeting corresponding position signal of feedback output reflecting mirror, the position signal includes vertical position signal and water
Flat position signal, wherein vertical position signal is that the pressure sensor on MEMS ontology feeds back MEMS out in vertical direction
Position signal, the position strict conformance with reflecting mirror vertical movement；Horizontal position signal is the pressure sensor on MEMS ontology
Feed back MEMS position signal in the horizontal direction out, the position strict conformance with reflecting mirror horizontal movement.
As the frame synchronizing signal generated at the beginning be with reflection driving signal in vertical driving signal corresponding to, and
MEMS adjusts the position signal behind reflection angle position for feedback reflector mirror, has certain phase shift with reflection driving signal
Value, therefore, it is necessary to first carry out delay correction process to former frame synchronizing signal, so that the frame synchronizing signal and the position signal
In vertical position signal it is corresponding, even if the rising edge of the frame synchronizing signal after delay correction process is vertical in position signal
The central point of the rising edge of position signal is corresponding to be overlapped, and the failing edge of frame synchronizing signal and the peak point of vertical position signal are corresponding
It is overlapped.
In this way, it is corresponding with the position signal to realize the frame synchronizing signal.It will carry out the frame after delay correction process
The frame synchronizing signal that synchronization signal is prestored as described in.
It should be noted that in image is shown, what each frame image was made of a certain number of pixel columns, and row is same
Step signal is generated according to the horizontal position signal in position signal, i.e., the described sinusoidal signal, horizontal position signal and level
Phase-shift value between driving signal is equal to the phase-shift value between vertical position signal and vertical driving signal, due to what is be initially generated
Frame synchronizing signal is corresponding with vertical driving signal, therefore, by carrying out delay correction process to frame synchronizing signal, so that frame synchronization
Signal is corresponding with vertical position signal, and it is corresponding with line synchronising signal to can be realized frame synchronizing signal, is to realize that every frame image is drawn
The pixel column in face simultaneous display corresponding with every frame picture.
In one embodiment, it when receiving described image data-signal, is generated and is reflected according to described image data-signal
Driving signal, and generate frame synchronizing signal corresponding with the reflection driving signal；It is adjusted using the reflection driving signal
The position of reflecting mirror, and obtain the position signal of the reflecting mirror, wherein the position signal includes horizontal position signal and hangs down
Straight position signal；Delay correction process is carried out to the frame synchronizing signal, so that the frame synchronizing signal and the position signal
It is corresponding, and the frame synchronizing signal that the frame synchronizing signal is prestored as described in.In this way, it is synchronous with row to realize frame synchronizing signal
The synchronization of signal.
In addition, the present invention also proposes that a kind of laser projection component, the laser projection component include laser, MEMS microcomputer
Electric system, filter amplifier and voltage comparator, wherein the MEMS has reflecting mirror, and the reflecting mirror is put with the filtering
Big device is connected, and the filter amplifier is connected with the voltage comparator, and the voltage comparator is connected with the laser, institute
Filter amplifier is stated for the sinusoidal signal received to be filtered amplification, the voltage comparator is put for that will be filtered
It is pulse signal that the sinusoidal signal after big, which carries out analog-to-digital conversion, and the laser projection component includes:
The laser projection component includes memory, processor and is stored on the memory and can be in the processor
The generation program of the line synchronising signal of upper operation is realized such as when the generation program of the line synchronising signal is executed by the processor
The step of generation method of above-mentioned line synchronising signal.
In addition, the present invention also proposes that a kind of laser-projector, the laser-projector include laser projection as described above
Component, the laser-projector include:
The laser-projector includes memory, processor and is stored on the memory and can be on the processor
The generation program of the line synchronising signal of operation is realized as above when the generation program of the line synchronising signal is executed by the processor
The step of stating the generation method of line synchronising signal.
In addition, the present invention also proposes a kind of computer readable storage medium, which is characterized in that the computer-readable storage
Medium includes the generation program of line synchronising signal, is realized as more than when the generation program of the line synchronising signal is executed by processor
The step of generation method of line synchronising signal described in embodiment.
The serial number of the above embodiments of the invention is only for description, does not represent the advantages or disadvantages of the embodiments.
Through the above description of the embodiments, those skilled in the art can be understood that above-described embodiment side
Method can be realized by means of software and necessary general hardware platform, naturally it is also possible to by hardware, but in many cases
The former is more preferably embodiment.Based on this understanding, technical solution of the present invention substantially in other words does the prior art
The part contributed out can be embodied in the form of software products, which is stored in one as described above
In storage medium (such as ROM/RAM, magnetic disk, CD), including some instructions are used so that a terminal device (can be TV
Machine, mobile phone, computer, server, air conditioner or network equipment etc.) execute method described in each embodiment of the present invention.
The above is only a preferred embodiment of the present invention, is not intended to limit the scope of the invention, all to utilize this hair
Equivalent structure or equivalent flow shift made by bright specification and accompanying drawing content is applied directly or indirectly in other relevant skills
Art field, is included within the scope of the present invention.
Claims (10)
1. a kind of generation method of line synchronising signal, which is characterized in that the generation method of the line synchronising signal includes following step
It is rapid:
The sinusoidal signal received is filtered amplification, and is converted to the first pulse signal；
According to the pulse width and pulse center point of the high level of first pulse signal, the second pulse signal is generated；
The delay process that preset time is carried out to second pulse signal, so that the rising edge of second pulse signal and institute
The peak value for stating sinusoidal signal is corresponding；
It in the period for obtaining row point bright pixel, is lighted according to the rising edge of second pulse signal after delay process and the row
The period of pixel generates line synchronising signal.
2. the generation method of line synchronising signal as described in claim 1, which is characterized in that the sinusoidal signal that will be received
It is filtered amplification, and the step of being converted to the first pulse signal includes:
The sinusoidal signal received is filtered amplification, to increase the amplitude of the sinusoidal signal；
Reference voltage is obtained, analog-to-digital conversion is carried out to the sinusoidal signal after filter and amplification according to the reference voltage, is generated
Peak value first pulse signal equal with the reference voltage.
3. the generation method of line synchronising signal as described in claim 1, which is characterized in that described to be believed according to first pulse
Number high level pulse width and pulse center point, generate the second pulse signal the step of include:
Obtain the pulse width and pulse center point of each high level of first pulse signal；
Half pulse width mean value is calculated according to the pulse width of each high level；
Generation rising edge is overlapped with the pulse center point of the high level and the pulse width of high level is equal to half pulse
Second pulse signal of width mean value.
4. the generation method of line synchronising signal as claimed in claim 3, which is characterized in that described according to each high level
Pulse width the step of half pulse width mean value is calculated include:
The pulse width of each high level is subjected to read group total, and mean value is calculated according to summed result, to obtain arteries and veins
Rush width mean value；
By filtering algorithm, using half numerical value of the pulse width mean value as the half pulse width mean value.
5. the generation method of line synchronising signal as described in claim 1, which is characterized in that the generation side of the line synchronising signal
Method is applied to laser projection component, and the laser projection component includes lasers and mirrors, and the sine that will be received is believed
Number it is filtered amplification, and before the step of being converted to the first pulse signal, further includes:
By the horizontal position signal for the reflecting mirror for obtain after horizontal adjustment to the reflecting mirror, as the sinusoidal letter
Number；
It is described to be gone according to the rising edge of second pulse signal after delay process with the period of row point bright pixel, generation
After the step of synchronization signal, further includes:
The frame synchronizing signal prestored and viewdata signal are obtained, according to the frame synchronizing signal and the line synchronising signal, control
It makes the laser and emits laser beam corresponding with described image data-signal to the reflecting mirror, be imaged with reflective projection.
6. the generation method of line synchronising signal as claimed in claim 5, which is characterized in that described to be carried out to the reflecting mirror
The horizontal position signal of the reflecting mirror obtained after horizontal adjustment, the step of as the sinusoidal signal before, further includes:
When receiving described image data-signal, reflection driving signal is generated according to described image data-signal, and generate
Frame synchronizing signal corresponding with the reflection driving signal；
Using the position of the reflection driving signal adjustment reflecting mirror, and obtain the position signal of the reflecting mirror, wherein described
Position signal includes horizontal position signal and vertical position signal.
7. the generation method of line synchronising signal as claimed in claim 6, which is characterized in that described to utilize reflection driving letter
The position of number adjustment reflecting mirror, and after the step of obtaining the position signal of the reflecting mirror, further includes:
Delay correction process is carried out to the frame synchronizing signal, so that the frame synchronizing signal is corresponding with the position signal, and
The frame synchronizing signal that the frame synchronizing signal is prestored as described in.
8. a kind of laser projection component, which is characterized in that the laser projection component include laser, MEMS MEMS,
Filter amplifier and voltage comparator, wherein the MEMS has reflecting mirror, the reflecting mirror and the filter amplifier phase
Even, the filter amplifier is connected with the voltage comparator, and the voltage comparator is connected with the laser, the filtering
Amplifier is used to for the sinusoidal signal received being filtered amplification, and the voltage comparator is amplified for that will be filtered
It is pulse signal that the sinusoidal signal, which carries out analog-to-digital conversion, and the laser projection component includes memory, processor and is stored in
On the memory and the generation program of line synchronising signal that can run on the processor, the generation of the line synchronising signal
The generation method for realizing the line synchronising signal as described in any one of claims 1 to 7 when program is executed by the processor
Step.
9. a kind of laser-projector, which is characterized in that the laser-projector includes laser projection group as claimed in claim 8
Part, the laser-projector include memory, processor and are stored on the memory and can run on the processor
Line synchronising signal generation program, when the generation program of the line synchronising signal is executed by the processor realize such as right want
The step of generation method of line synchronising signal described in asking any one of 1 to 7.
10. a kind of computer readable storage medium, which is characterized in that be stored with capable synchronization on the computer readable storage medium
The generation program of signal is realized when the generation program of the line synchronising signal is executed by processor as any in claim 1 to 7
The step of generation method of line synchronising signal described in.
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| CN115016114A (en) * | 2021-03-03 | 2022-09-06 | 中国科学院苏州纳米技术与纳米仿生研究所 | Laser scanning system and method |
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