CN102984528B - For the method and apparatus of at least one light beam of projection - Google Patents

Abstract

The present invention proposes a kind of method and apparatus at least one light beam of projection, wherein at least in part the maintenance duration of at least one picture point is extended at least in part with respect at least one other picture point.

Description

For the method and apparatus of at least one light beam of projection

The application is to be on January 8th, 2008 applying date, and application number is 200880124376.6, sends outBright name is called " for the method and apparatus of at least one light beam of projection " and applies for that artificial Ostland nurse hasThe divisional application of the application for a patent for invention of limit company.

Technical field

The present invention relates to a kind of method and apparatus at least one light beam of projection.

Background technology

In the projector based on so-called " flying spot (the Flying-Spot) " principle of work and power, by twoDimension resonance micro mirror carrys out deflected beam (typical case is made up of three primary colors red, green and blue), and projects to figureIn picture plane.

Fig. 1 shows the schematic diagram for the principle of work and power of explanation " flying spot " projection. At this, laserSource 101(red R), the blue B of 102() and 103(green G) the light beam of different colours divideDo not aim at translucent mirror (transmission of mirror and reflection are carried out according to wavelength) 104,105,106,And subsequently as total beam 110(also referred to as projection beam) aim at two-dimentional resonance micro mirror 107, itsBy the deflection and projecting on the plane of delineation 108 two-dimensionally of total beam 110. At this, at the plane of delineationIn 108 by continuously in phase the total beam 110 of deflection carry out design of graphics picture (in the plane of delineation 108Beam profile 109).

Image information is by intensity respective sources 101 to 103, that synchronize with the deflection of micro mirror 107Modulation generates and shows.

Due to the nonlinear deflection of micro mirror 107 and in the plane of delineation 108, obtain nonlinearBeam profile 109, time-multiplexed method is used to show the discrete image information in each position (" figurePicture point " or " pixel "): therefore in the time period limiting, definite information projection is flat to imageOn face.

The information of institute's projection especially represents brightness and the look by the light beam of light source 101 to 103 generationsColor stack, wherein the brightness of light beam can regulate by the amplitude of relevant light source.

Preferably, light source is respectively laser instrument, especially laser diode. Therefore, pass through laser instrumentElectric current corresponding to the brightness of the light of being launched by laser instrument.

Fig. 2 shows each picture point relevant with the position of corresponding picture point, in secondsThe view of sweep time range, or rather not only for row (referring to curve 201) but also pinTo row (referring to curve 202).

For example, the image of institute's projection is 640 picture point is wide and 480 picture point are high. By figureShown in 1 and described total beam 110 deflections 109 are produced: for example building by rowIn the situation of image, the middle part that total beam 110 is expert at is obviously than faster in border area.

Exemplarily, in the resolution 640 × 480 picture point according to the micro mirror in the example of Fig. 2In the situation of rate, there is the vertical frequency of horizontal frequency and the 1.2kHz of 27kHz.

Thus, by time-multiplexed method, the sky by picture point in the XY coordinate system about the timeBetween correlation obtained time range, restricted length and holding for each picture point on the timeThe continuous time.

Fig. 3 shows in the region (image middle part) at the middle part at the plane of delineation in Fig. 2 along (waterFlat) part of the time range of row.

Summary of the invention

Become and be apparent that according to above mentioned parameter: intensity or amplitude for modulated beam of light are comeBy image information without local error be presented at the required time resolution of the electronic installation on perspective planeRate is in the scope that is less than picosecond. In theory, by correspondingly the time is gone up high-resolution and high one-tenthThis circuit can reduce associated error. But this expense requires expensive device, and actualUpper (for example depending on selected resolution ratio) is not feasible all the time.

But, if reduce temporal resolution, picture quality reduce and due to wrong space phaseClose and occur distortion in picture point plane.

Another problem be due to the nonlinear deflection of micro mirror cause in time range and lane placeConversion between territory.

Selecting by time-multiplexed method in the time period of picture point, the rise time of electronic installationWith affected the contrast between picture point fall time. The rising of this impact by signal edge orPerson decline duration and strengthen: edge with to picture point can with time and space compared with longer,Contrast between picture point is just poorer.

According to the above-mentioned form of implementation for Fig. 2 and Fig. 3, in the case of constant edge slope,When have on the whole the minimum time can use (at image middle part) for picture point, contrastSo the poorest.

Fig. 4 exemplarily shows the image for the treatment of projection and has large as far as possible contrast (oftenTransition from white to black between two picture point or contrary) the plane of delineation a part.

Fig. 5 is corresponding to be shown simplifiedly for the driving voltage 501 of laser instrument and passing through of obtaining thusThe electric current 502 of laser instrument.

Curent change process 502 by laser instrument typically proportional with launched light quantity andThe brightness of feeling corresponding to observer thus.

Figure 5 illustrates picture point n-2, n-1 and n, they exemplarily have duration T_pAndAnd there is the light-dark-bright pattern according to Fig. 4. Driving voltage 501 is by laser turn-on, shutoffAnd connect again.

Edge slope based on final forms switch on delay 503 and 505 in the time connecting laser instrument, andAnd in the time turn-offing laser instrument, form turn-off delay 504 and 506.

The contrast between picture point that these delays are deteriorated significantly. Especially postponing 504With 506 during part dark picture point is illuminated, the accessible contrast of the maximum of projecting cell thusIn the case of showing that the edge in image, (high position frequency or spatial frequency) obviously reduces.

Fig. 6 shows the circuit block diagram for excitation laser 603.

There is the data signal 605 of n bit width by digital/analog converter 601(DAC) turnChange analog signal into and by amplifying for the driver of excitation laser 603. Laser instrument 603Be connected to power supply 604(VDD with its positive pole) upper and by digital/analog converter 601 byDriver 602 encourages.

For example personal computer of image source or PDA(Personal Digital Assistant) provide has n bitThe data signal 605 of width, it correspondingly converts analog signal to by digital/analog converter 601(current signal or voltage signal) is for excitation laser 603.

Required high time resolution is realized by high conversion ratio (sample rate). This to numeral/The conversion ratio of analog converter 601 has proposed high requirement.

Exemplarily, if to the resolution ratio with 640 × 480 picture point described above,The system of the horizontal frequency of 27kHz and the vertical frequency of 1.18kHz is observed, digital-to-analogConverter 601 must provide the temporal resolution that is less than 280ps, and position resolution error exists thusBelow 1%.

This means the 3GHz's of conversion ratio to digital/analog converter 601 and digital interfaceBandwidth requirement.

If this electronic installation can realize completely must be extremely complicated, be with lossy, andAnd be expensive. In addition it should be noted: the circuit shown in Fig. 6 and consequent expense are respectivelyBe essential for each laser instrument, and make thus the cost multiplication being associated with it.

Task of the present invention is, avoids shortcoming recited above, and especially in " flying spot " sideA kind of simple, efficient and tolerable error and with low cost projection possibility is provided in the situation of formulaProperty.

This task solves according to the feature of independent claims. Improvement project of the present invention is also by subordinateClaim obtains.

In order to solve this task, a kind of method at least one light beam of projection is proposed, wherein at leastPartly by the maintenance duration of at least one picture point with respect at least one other picture pointExtend.

Especially the in the situation that of flying spot method, projection beam moves in phase on the plane of delineation. AsThat set forth above is such, and the speed of projection beam changes according to the position of the picture point that will show.Thus, in the picture point at the middle part of the row on perspective plane than the picture point tool of the edge on perspective planeThere is shorter duration (being that projection beam has corresponding higher speed at this).

This effect compensates effectively in the following way: especially all following points are introduced and keptDuration: have larger compared with these picture point that there is maximal rate with projection beam whereinDuration.

The scheme proposing at this can be for comprising the projection beam of multiple light beams, or also can divideNot for each single light beam.

Term " keep duration " especially comprise picture point value (for example at least one light beamAt least one laser instrument modulated current) or information.

Fundamental clock, carrys out the digital unit of drive circuit by it.

An expansion scheme is: according to the position of the projection of corresponding picture point, prolong at least in partThe maintenance duration of long at least one picture point.

Advantageously, keep the duration to keep level to extend by least one sampling.

Especially, keep duration and fundamental clock to regulate asynchronously. Unnecessary thus: baseThis clock is many times of the integers of each possible maintenance duration. Can advantageously reduce thus numeralRequired operating frequency or the fundamental clock of maximum of parts.

An improvement project is: at least one digital/analog converter is used for encouraging at least one light beam,-wherein digital/analog converter drives with fundamental clock,

-wherein extend at least partly in the following way the maintenance duration of at least one picture point: according toFundamental clock is determined pixel clock, and the maintenance that wherein extends at least one picture point based on pixel clock is heldThe continuous time.

Especially, an improvement project is: pixel clock is corresponding to many times of the integers of fundamental clock.

Advantageously, the maintenance duration can be asynchronous with fundamental clock and pixel clock.

Another improvement project is: keep the duration to regulate by delay-level. Especially, prolongLevel can encourage by (numeral) pumping signal late.

At this, preferably can use predetermined width (for example 4 bits according to the required quantification postponingOr 5 bits) data signal.

An expansion scheme is: delay-level comprises that sampling keeps level and time-controlling arrangement, wherein timeControl device is controlled sampling by pumping signal and is kept level.

Therefore, can carry out production burst by digital stimulus signal, its length is relevant to pumping signal alsoAnd therefore sampling given in advance keeps the maintenance duration of level.

Also possible that: pumping signal is given in advance and by the excitation letter of this simulation with analog formNumber carry out excitation samples and keep level.

Preferably, numeral or analogue stimulus signal corresponding to relevant with homolographic projection, in order to reachOr lower than the required maintenance duration of minimum requirements given in advance (Resolution Error).

Another expansion scheme is: the first information of picture point changes according to the second information. Especially,The first information of picture point can change during the duration of this picture point of projection.

Thus, reduce can be by effectively for the problem of limited edge slope and the contrast that obtains thusCompensation. Like this, the first information of picture point can be before the duration of the first picture point expires with figureThe second information matches of picture point. To this, advantageously by two picture point buffer memorys and by their informationAdaptation relatively or as described mutually.

Alternatively, also can only previous value be carried out to buffer memory.

An improvement project is: the first information comprises amplitude and/or the brightness for showing image. PhaseYing Di, the second information can comprise amplitude and/or the brightness of at least one follow-up picture point.

Especially, the brightness of picture point can be relevant with the size of the modulated current of laser instrument.

Another improvement project is: the first information of picture point is changed into and made substantially reaching at least oneIn individual follow-up picture point, obtain the second information.

Especially, reach at least one follow-up picture point and can comprise one of following standard:

-reaching at least one follow-up picture point, soon before or in the near future;

-substantially reach the space given in advance to picture point stretch in, soon before or soon itAfter.

An improvement project is: at least one picture point is provided with memory, for by picture pointThe first information and the second information comparison.

Especially, memory can comprise that the sampling of two alternative excitations keeps level.

An expansion scheme is, at least two digital/analog converters are set, and they alternately encourageLight beam, for by the first information of picture point and the second information comparison.

At this, digital/analog converter is born the function of memory, and its mode is comparand alternatelyThe output signal of word/analog converter.

The digital/analog converter of the sample rate with twice also can be set alternatively. StorageSo can keep level to carry out by sampling.

Another expansion scheme is: the first information of picture point changes according to the second information, its modeThat the end in picture point deducts the edge of decline required from the duration of picture point substantiallyFall time.

In addition, an improvement project is: at least one light beam is parameterized for making compensating image error.

For example, like this can compensatory light or the static alignment error of laser instrument or optics. ByIn this inexactness, for example, on the plane of delineation (projection plane), form in multiple light source (examplesAs three laser instruments that color is different) light beam between possible skew. Thus, light source is in advanceThe given moment throws light on to the different point on perspective plane. This error along with reduce illumination timeLength and the therefore increase constantly along with higher resolution ratio.

The scheme proposing at this can realize (being less than image in obtained subpixel areaIn the region of point) the compensation of this alignment error, and do not need complicated and expensive mounting technique.

Thus, an improvement project is: at least one light beam each maintenance continueTime is adjusted so that the picture point that each is projected to and difference is associated of at least one light beamIn corresponding region.

Another improvement project is: described at least one light beam comes inclined to one side partly by the projection arrangement of deflectionTurn. Preferably, the projection arrangement of deflection is micro mirror, especially two-dimentional resonance micro mirror.

Another improvement project is that described at least one light beam is made up of at least one light source.

Especially, an improvement project is: described at least one light source comprises at least one laser instrument,Especially at least one laser diode.

An improvement project is: light beam is swashed by a red laser, a blue laser and a greenLight composition.

In addition, an improvement project is: light beam is by a red laser, blue laser and twoGreen laser composition.

Correspondingly, light beam can be made up of the combinations thereof of many times.

In the scope of additional improvement project, described at least one light beam is thrown by flying spot methodShadow.

In addition,, in order to solve task described above, proposed a kind of at least one light of projectionThe device of bundle, it comprises processor unit and/or the circuit arrangement being fixedly connected with and/or freely programmableLogic circuit, this Logic Circuit Design can be carried out method as the described herein for making.

Above-mentioned processor unit can be or comprise the processor of any type or calculator orPerson's computer, it is with corresponding required peripheral circuit (memory, input/output interface, inputOutput device etc.). The circuit unit being fixedly connected with or the logic circuit of freely programmable can beFPGA, CPLD, ASIC or other integrated circuits.

In order to solve above-mentioned task, a kind of device at least one light beam of projection has also been proposed, itsComprise delay-level, can at least in part the maintenance of at least one picture point be continued by this delay-levelTime postpones with respect at least one other picture point.

Improvement project, expansion scheme and other forms of implementation for diverse ways are correspondingly suitable equallyFor this device.

An improvement project is: according to the position of the projection of corresponding picture point, and can by delay-levelThe maintenance duration of extension pin to described at least one picture point at least in part.

Next improvement project is: be provided with digital/analog converter for encourage described at least oneLight beam,

-wherein digital analog converter can drive by fundamental clock,

-wherein can extend at least partly the maintenance duration for described at least one picture point, its sideFormula is: can determine pixel clock by fundamental clock, wherein can extend use based on pixel clockIn the maintenance duration of described at least one picture point.

An expansion scheme is, pixel clock is corresponding to many times of the integers of fundamental clock.

One can alternative form of implementation be: can by pumping signal, especially digital stimulus signalWith excitation delay-level.

Next expansion scheme is: delay-level comprises that sampling keeps level and time-controlling arrangement, Qi ZhongshiBetween control device by pumping signal control adopt keep level.

Another expansion scheme is: this device has the unit for improving contrast, wherein picture pointThe first information can change according to the second information.

An improvement project is: the first information of picture point can be during the duration of the projection of picture pointChange.

An additional expansion scheme is: the first information comprise amplitude for showing picture point and/orBrightness. Correspondingly, the second information can comprise the amplitude of at least one follow-up picture point and/or brightDegree.

Another expansion scheme is: the first information of picture point can be changed into and make substantially reachingState at least one follow-up picture point and obtain the second information.

Another kind of possibility is, reach described at least one follow-up picture point comprise following standard itOne:

-reaching at least one follow-up picture point, soon before or in the near future;

-substantially reach the space given in advance to picture point stretch in, soon before or soon itAfter.

Another expansion scheme is: be provided with the memory at least one picture point, for by imageThe first information and the second information comparison of point.

Another improvement project is: memory comprises that two are kept level by the sampling of alternative excitation.

An improvement project is: be provided with at least two digital/analog converters, they alternately swashEncourage light beam, in order to by the first information of picture point and the second information comparison.

An improvement project is: the first information of picture point can change according to the second information, itsMode is that the end in picture point deducts the edge to declining from the duration of picture point substantiallyRequired fall time.

Another expansion scheme is: described at least one light beam can parameter turns to and makes compensating image mistakePoor.

An expansion scheme is: regulate each maintenance of at least one light beam to hold by delay-levelThe continuous time, each that makes at least one light beam is projected to corresponding to associated respectively picture pointRegion in.

In addition, an expansion scheme is: be provided with the projection arrangement of deflection, it is partly by extremely describedA few beam deflection. Especially, the projection arrangement of deflection can comprise micro mirror, especially two-dimentional humorousMicro mirror shakes.

In the scope of an additional improvement project, described at least one light beam can be by least oneLight source composition. Preferably, described at least one light source can comprise at least one laser instrument, especiallyAt least one laser diode.

An improvement project is: light beam is swashed by a red laser, a blue laser and a greenLight composition.

Another expansion scheme is: light beam is swashed by a red laser, a blue laser and two greensLight composition.

Another improvement project is: this device is by least one light beam described in the projection of flying spot method.

The invention provides a kind of method at least one light beam of projection,

-wherein at least in part by the maintenance duration of at least one picture point with respect at least oneIndividual other picture point extends;

The position of-wherein the projection of the corresponding picture point of basis is at least in part by least one imageThe maintenance duration of point extends;

-wherein keep the duration to regulate by delay-level; And

-wherein to go the image building in the case of pressing, the middle part ratio that total beam is expert at is at border areaIn faster.

The present invention also provides a kind of device at least one light beam of projection, and described device is arranged toCarry out according to above-described method, and comprise delay-level, can be at least part of by this delay-levelGround extends the maintenance duration of at least one picture point with respect at least one other picture point.

Brief description of the drawings

Illustrate and set forth embodiments of the invention referring to accompanying drawing.

Wherein:

Fig. 1 shows the schematic diagram for the principle of work and power of explanation " flying spot " projection.

Fig. 2 shows each picture point relevant with the position of corresponding picture point, in secondsThe view of sweep time range.

Fig. 3 shows in the region (image middle part) at the middle part at the plane of delineation in Fig. 2 along (waterFlat) part of the time range of row.

Fig. 4 exemplarily shows the image for the treatment of projection and has large as far as possible contrast (oftenTransition from white to black between two picture point or contrary) the plane of delineation a part.

Fig. 5 is corresponding to be shown simplifiedly for the driving voltage 501 of laser instrument and passing through of obtaining thusThe electric current 502 of laser instrument.

Fig. 6 shows the circuit block diagram for excitation laser 603.

Fig. 7 shows a kind of for the circuit block diagram by delay-level excitation laser.

Fig. 8 shows the time model of the quantification to each picture point in the region around image middle partThe view enclosing;

Fig. 9 shows the correlation of time range and definite picture point;

Figure 10 shows the circuit block diagram for carry out excitation laser by (programmable) delay-level,Wherein this delay-level comprises time-controlling arrangement and keeps the switch of level with sampling;

Figure 11 shows the block diagram of circuit, can produce edge alternative have by this circuitThe pulse of width given in advance.

Figure 12 shows the sequential chart associated with Figure 11;

Figure 13 shows the circuit block that optionally produces the pulse of width given in advance for edgeFigure;

Figure 14 show especially to picture point n, n+1 etc. and relevant with fundamental clock,The sequential chart associated with Figure 13;

Figure 15 shows the figure of the time changing curve of the pumping signal with laser instrument; Wherein excitationDuration can be according to picture point content and the rise time to the required modulated current of laser instrumentOr change fall time.

Figure 16 shows a table, wherein for compensation and not the situation with compensation contrast illustrateAs this tittle of contrast, contrast ratio, maximum intensity and minimum strength;

That Figure 17 A shows is relevant with rise time at edge or fall time, it is balanced to be withContrast and the not comparison of the contrast with compensation;

That Figure 17 B shows is relevant with rise time at edge or fall time, it is balanced to be withContrast ratio and the not comparison of the contrast ratio with compensation;

It is relevant with rise time at edge or fall time, non-by compensation that Figure 17 C showsThe energy loss that desirable edge causes and luminance loss thus.

Figure 18 shows by the circuit block diagram that carrys out excitation laser for the unit that improves contrast;

That Figure 19 shows is associated with Figure 18, based on according to the sequential of the projection of the checkerboard pattern of Fig. 4Figure;

Figure 20 shows the sequential chart of the projection of bright picture point associated from Figure 18, based on different,Wherein picture point n-1 only has the brightness slightly reducing with respect to picture point n-2;

Figure 21 shows by the circuit block diagram that carrys out excitation laser for the unit that improves contrastOne can alternative expansion scheme, wherein replace according to two of Figure 18 samplings and keep level to use twoIndividual digital/analog converter.

Figure 22 shows the sequential chart associated with Figure 21.

Detailed description of the invention

Scheme described herein especially can realize in digital/analog converter and output stage orIn signal path between drive circuit by programmable or with analog form adjust delay-levelEffectively reduce the correlated error on space.

This realizes especially in the following way: the output signal of digital/analog converter keeps pre-First given duration, makes tying for corresponding how much of picture point in the image of the time of staying and institute's projectionStructure or position are about ground is corresponding to the correct demonstration of picture point.

In addition the scheme proposing at this, allows to solve as follows asking of limited edge slopeTopic: information (for example amplitude or the brightness) picture point follow-up according at least one of each picture pointInformation (for example amplitude or brightness) change, especially its mode be the end of picture point fromIn the nominal time of this picture point, deduct the required fall time of edge of decline.

Effectively prevent thus because limited edge slope loses the picture point on perspective planeClear and definite space correlation.

Another favourable scheme is the combination of solution. For reducing the solution of space correlation errorScheme and optimize contrast and affect the time of each picture point by compensating limited unit, edge.

In addition, proposition is time by controlling each picture point to compensate vertical subpixel areaIn alignment error.

To the improvement of spatial coherence

Fig. 7 shows the circuit block diagram that carrys out excitation laser 703 by delay-level 706.

There is the data signal 705 of n bit width by digital/analog converter 701(DAC) turnChange analog signal into, by adjustable delay-level 706 be delayed in time and by for swashThe driver of encouraging laser instrument 703 amplifies. This its positive pole of laser instrument 703 use is connected to power supply 704(VDD) on.

Obtain thus the fundamental clock for driving digital/analog converter 701 and pixel clock itBetween the asynchronism of having a mind to, wherein in this pixel clock, show corresponding picture point.

For example, if hypothesis be the system with the resolution ratio of 640 × 480 pixels (wherein forThe micro mirror of projection beam deflection is there is to the vertical frequency of horizontal frequency and the 1.18kHz of 27kHz),Digital/analog converter 701 has the temporal resolution that is less than 280ps, thus the local mistake of differentiatingPoor (or associated error) is below 1%.

Resolution error stretches corresponding to the space that has error of the pixel on projection plane.

What obtain thus is according to the time quantization of each picture point in the image middle part of Fig. 8.

Figure 9 illustrates the associated of time range and definite picture point.

For the picture point at the middle part of projection row (for example, with coordinate (width, highly) 320,240Picture point), for the required time range of this picture point n corresponding to fundamental clock. This is by as followsThe fact obtains: the shortest time occurring in need to the picture point of all projections for picture point nScope, because projection beam is with the inswept picture point n of maximum speed.

Thus, the time range T of picture point n_pDetermine the duration of fundamental clock, by thisDuration drives digital/analog converter.

For example,, in vertical 1.18kHz and the image frequency rate of horizontal 27kHz and 640 × 480 resolutionIn the situation of rate, obtain the fundamental clock of 56MHz, because the described time model to picture point nEnclose for 18ns.

Reach precision given in advance when associated with position in time of each single picture point,According to Fig. 9, the time range of picture point n+1 is than the large extra time model of the time range of picture point nEnclose Δ t_p。

According to this example, extra time range Δ t_pBe set to 280ps, to can realize 1%Following associated error.

In addition, the time range of picture point n+2 is larger when extra than the time range of picture point n+1Between scope 2 Δ t_p. Thus, for the picture point from image middle part to edge, required extra timeScope pointwise becomes larger. From definite picture point m, extra time range is:

m·Δt_p＝T_p

This means: pixel clock can reduce by half from picture point m, because be suitable for:

m·Δt_p+T_p＝2·ΔT_p

Advantageously, to be chosen as and to make it be shortest time to the time basis of whole system (reference clock)The integer approximate number of time range (pixel clock) of picture point.

For example, have 112MHz fundamental clock 4 bit interface can for excitation delay-level.

The model for two-dimentional micro mirror shown in Fig. 6 equally also can be applied to other of mirror systemScheme.

Figure 10 shows for carrying out excitation laser 1008 by (programmable) delay-level 1001Circuit block diagram, this delay-level comprises time-controlling arrangement 1005 and switch 1004.

With the data signal 1010 of n bit width by digital/analog converter 1002(DAC)Convert analog signal to and be applied on switch 1004. The digital actuation of time-controlling arrangement 1005Signal 1011 gauge taps 1004, are mapped to the analog signal of digital/analog converter 1002In the corresponding time range of picture point.

The output of switch 1004 is connected with output stage, and this output stage comprises driver 1007, laserDevice 1008 and for the power supply 1009 of laser instrument.

Switch 1004 comprises that so-called sampling keeps level. Even if being no longer applied to sampling, input value keepsLevel, this sampling keeps level keep analog input value or stored the time period given in advance.

Time-controlling arrangement 1005 by pumping signal 1011 carry out parametrization, according to control signal 1011Value carry out energizing switch 1004, and therefore realize sampling keep level corresponding to pumping signal 1011Delay.

Time-controlling arrangement 1005 and possible realization and expansion scheme thereof have below been described.

First, Figure 11 shows the circuit block diagram of circuit, can produce edge optional by this circuitThere is to selecting property the pulse of width given in advance. Figure 12 shows the sequential chart associated with Figure 11.

Figure 11 shows input signal U_i, its be applied on the input of NAND door 1103 andOn the input of NOR door 1106. In addition input signal U,_iBy delay-level 1101 and follow-upPhase inverter 1102 be connected with another input of NAND door 1103. Input signal U_iAlso pass throughDelay-level 1104 is connected with another input of NOR door 1106 with follow-up phase inverter 1105.NAND door 1103 provides voltage U_bAs output signal, NOR door 1106 provides voltage U_aDoFor output signal.

Signal is postponed respectively duration Δ t by delay-level 1101 and 1104.

Voltage change process U_i、U_aAnd U_bBe illustrated in the sequential chart of Figure 12.

Utopian sequential at Figure 12 there is shown: input signal U_iRising edge cause voltageU_bIn duration Δ t, transform to " 0 " by " 1 ". Correspondingly, input signal U_iTrailing edge causeVoltage U_aIn duration Δ t, transform to " 1 " by " 0 ".

Figure 13 shows the circuit that optionally produces the pulse of width that can be given in advance for edgeBlock diagram.

Figure 13 comprises frame 1303, and it corresponds essentially to the circuit block diagram according to Figure 11. With Figure 11Different, in frame 1303, replace input signal U_iApply (pretreated) pixel clock1301. In addition, corresponding delay-level can regulate by control signal (control parameter) 1302.On the output of frame 1303, there is signal 1304(to replace the voltage U of Figure 11_b) and signal 1305(replace the voltage U of Figure 11_a) available.

After frame 1303, be connected with the unit 1306(impulse generator for generation of pulse), itsComprise two phase inverters 1307 and 1309 and NAND door 1308 and NOR door 1310. Signal1304 are directly connected with NAND door 1308 on one side, on one side by phase inverter 1307 and NAND door1308 are connected. Signal 1305 is directly connected with NOR door 1310 on one side, passes through phase inverter on one side1309 are connected with NOR door 1310.

The output of NAND door 1308 is the SET input with trigger 1314 by phase inverter 1311End (input is set) is connected. The RESET of the output of NOR door 1310 and trigger 1314Input (the RESET input) is connected. Trigger 1314 is especially embodied as rest-set flip-flop.

The signal intercepting on the output of NAND door 1308 is called signal 1312, and at NORThe signal intercepting on the output of door 1310 is called signal 1313. In the Q of trigger 1314 outputOn end, intercept pumping signal 1315.

That Figure 14 shows is associated with Figure 13, especially with picture point n, n+1 etc. and when basicThe sequential chart that clock is relevant.

For picture point n, fundamental clock is synchronizeed with pixel clock 1301, because for example picture point nFollowing picture point: the in the situation that of this picture point, projection beam has maximum speed and thereforeIn all picture point for this picture point n provides the minimum time period.

Signal 1304 has been described the output signal of the first delay-level. At pixel clock 1301 from logical zeroIn each transition of logical one (rising edge), produce under following condition for signal 1304Raw logical zero pulse: signal 1305 is logical zero in this moment. This is for picture point n+4Situation is really not so, and (in the case of the rising edge of pixel clock 1301, signal 1305 is logics" 1 "), in signal 1304, there is not trailing edge at this thus.

Signal 1305 has the transition to logical one at each trailing edge of pixel clock 1301.

The pulse width of signal 1304 and 1305 with control signal 1302(referring to Figure 13) relevant.

Rising edge (transition from logical zero to logical one) and the signal 1305 of signal 1304Trailing edge (transition from logical one to logical zero) produce respectively according to signal 1312 withAnd according to the short pulse of signal 1313. These pulses for by trigger 1314 carry out set (bySignal 1312) and reset (by signal 1313).

Signal 1315 on the Q of trigger 1314 output keeps level for excitation samples.

This scheme has following advantage: sampling keeps the pumping signal 1315 of level asynchronous with fundamental clock,And can reach thus the high position resolution of optical projection system. Thus, sampling keeps the excitation of levelThe pulse width of signal 1315 can change and consider following situation: at the image at image middle partCompared with the picture point of point (" picture point n ") and the edge of the image in projection, there is shorter duration,Especially the duration of picture point n increases towards edge direction.

At this, for the pulse width ratio of the logical one pulse of picture point n for picture point n+1The pulse width of logical zero pulse little. This means: the pulse width of logical one pulse withAnd the pulse width of logical zero pulse continues to image edge to increase from the image middle part of the image of projectionAdd.

If the pulse width of this pumping signal 1315 needs duration in cycle whole of fundamental clockMany times of numbers (for example in Figure 14 for picture point n+4), pixel clock 1301 reduces by half (from figurePicture point n+5 rises, and pixel clock 1301 reduces by half with respect to picture point n+4), wherein pixel clock 1301Edge be according to the time reference of the circuit of Figure 13, and thus signal 1304 and 1305 from figurePicture point n+5 is correspondingly generated by the pixel clock 1301 after changing.

The control signal that keeps level according to the sampling of Figure 10 has been determined at the edge of pumping signal 13151401. By each pulse of control signal 1401 by 1004 make pulses of the switch in Figure 10Duration. The output valve of digital/analog converter is sampled and keeps level storage in this duration thus, andAnd be transmitted to output stage 1006. The signal of output stage 1006 illustrates as signal 1402 in Figure 14.

The width of pulse passes through the control signal 1302(of digital interface referring to Figure 13) determine. ThisCan realize the corresponding positions with the picture point on perspective plane by time range required each picture pointPut and carry out precise time association.

Because the duration of each picture point increases towards border area continuously from image middle part, so canCan be replace (for example thering are 4 bit widths) digital interface be provided with controlled counter, itsThe independently required delay of the difference of picture point given in advance. This tool has the following advantages: can reduce numberAccording to the width of bus.

The improvement of contrast

Figure 15 illustrates the figure having for the time course of the pumping signal of laser instrument, whereinExcitation the duration change can according to the rise time to the required modulated current of laser instrument or underTime falls and picture point content is carried out.

Figure 5 illustrates in the case of do not proposed here for swashing the scheme compensatingThe excitation of light device. Do not having in balanced situation, adjacent picture point can not separated clearly.

And allowing to separate clearly adjacent area according to the compensation of Figure 15: each picture point needs durationT_p. Obtain rising edge or trailing edge the limited switch time by laser instrument, and they need respectivelyDefinite duration t_c. This duration t_cEspecially information-related with picture point, for example follow-up or frontAmplitude or the brightness of picture point.

The compensation proposing at this can realize when the duration in picture point expires substantially picture pointRegulate for the information (amplitude or brightness) of follow-up picture point.

Suitable this amplitude that is especially less than present image point in the amplitude of follow-up picture pointWith.

Therefore realized: the time range T of ensuing picture point on adjacent or space_pOpenBefore beginning, the amplitude fading of the picture point that is through with is to ensuing picture point on adjacent or spaceThe value of amplitude.

Can this characteristic be described by the following expression formula relevant to intensity I:

Contrast definition:

$K=\frac{I_{\max }-I_{\min }}{I_{\max }+I_{\min }}$

Contrast ratio:

$K_v:1=\frac{I_{\max }}{I_{\min }}:l$

Figure 16 shows a table, its for compensation and do not illustrate contrastively with the situation of compensationAs this tittle of contrast, contrast ratio, maximum intensity and minimum strength.

In order to reach 100% from 0% of maximum intensity, need the time t shown in Figure 16_rf. In realityIn trampling, preferably to t_rfSuppose following duration: maximum intensity need to reach from 10% of its value by this durationTo 90%. In addition, can suppose simplifiedly that to this linear rising is (also for 0% to 100% modelEnclose).

That Figure 17 A shows is relevant with rise time at edge or fall time, with compensation (songLine 1701) and the not comparison of the contrast with compensation (curve 1702).

That Figure 17 B shows is relevant with rise time at edge or fall time, with compensation (songLine 1703) and the not comparison of the contrast ratio with compensation (curve 1704).

That Figure 17 C shows is relevant with fall time with rise time at edge, by the non-line of compensationEnergy loss and luminance loss 1705 that the edge of property causes.

For example, at the curve shown in Figure 17 A, 17B and 17C based on following parameter:

T_p=18ns $\frac{A_{\mathrm{Offset}}}{A_{\max }}=\mathrm{0,01}$

Parameter A_Offset/A_maxOwing to the impact of ambient light and the space of projection beam stretching and produce.

The comparison of the curve by Figure 17 A and Figure 17 B, via compensation described herein, formsObvious improvement in same edge along contrast or contrast ratio in slope situation. Like this, for exampleIn the case of considering the edge slope of 2ns, with contrast or the 90:1 with balanced 98%Contrast ratio compare, for example obtained not having balanced 85% contrast or 15:1Contrast ratio.

For example, if reach the contrast ratio of 90:1, by described compensation method thusObtain rise time or the fall time of the 2ns in the case of 5% luminance loss, or notIn the case of 0% energy loss, be less than 200ps by compensation method.

Appreciable thus, do not using the compensation method proposing in the case of this and can not obtainThe contrast ratio of 90:1. The intensity loss being caused by compensation method can be by the modulation electric of laser instrumentThe coupling of stream compensates.

Figure 18 shows by unit 1813 for improving contrast and carrys out excitation laser 1808Circuit block diagram.

With the data signal 1810 of n bit width by digital/analog converter 1802(DAC)Convert analog signal to and be applied to switch 1801 and switch 1804 on. Switch 1801 comprisesThe sampling that triggered by signal 1814 keeps level, and switch 1804 comprises and being triggered by signal 1815Sampling keeps level.

The output of switch 1801 is connected with switch 1812. The output of switch 1804 connects equallyTo switch 1812, wherein switch 1812 by switching signal 1816 by its output and switch 1801Output be connected or be connected with the output of switch 1804.

The output of the output of switch 1801 and switch 1804 respectively with for improving contrastThe input of unit 1813 is connected, and the output of unit 1813 provides switching signal for switch 18121816。

Time-controlling arrangement 1805 is by digital stimulus signal 1811 parametrizations, wherein time-controlling arrangementEach output of 1805 respectively provides signal 1814, signal 1815 and signal 1817 for encouraging useIn the unit 1813 that improves contrast.

The output of switch 1812 is connected with output stage 1806, this output stage comprise driver 1807,Laser instrument 1808 and for the power supply 1809 of laser instrument.

Switch 1801 and 1804 in Figure 18 respectively comprise or described sampling keep level, asThe storage link of simulation, its output voltage storage by digital/analog converter 1802 is given in advanceDuration (it is especially greater than the duration to showing that each picture point is required).

Two this samplings that are provided with switch 1801 and 1804 forms in Figure 18 keep level. Phase, can there is multiple switches or storage level in Ying Di.

For the unit 1813 that improves contrast by the range value of current picture point and follow-up imageThe range value of point compares. According to the width between the range value being stored in switch 1801 and 1804The poor switching instant of determining switch 1812 of degree.

Switch 1812 switches between the signal being applied on switch 1801 and 1804, and will connectLogical signal is transmitted to output stage 1806.

By time-controlling arrangement 1805(, it is especially embodied as digital processing to switch 1801 and 1804Level) encourage by signal 1814 and 1815. Time-controlling arrangement 1805 is especially by imagingThe digital interface of system is carried out parametrization.

At this, parametrization especially comprises definite system features given in advance, for example definite edgeSlope.

Be stored in switch 1801 Hes for the unit 1813 that improves contrast by signal 1816 basesMagnitude of voltage in 1804 switches switch 1812, and obtains from time-controlling arrangement 1805Control signal 1817.

That Figure 19 shows is associated with Figure 18, based on according to the sequential of the projection of the checkerboard pattern of Fig. 4Figure.

Immediately at the required duration T of the picture point n-2 for follow-up_pBefore beginning, Closing Switch1804. This pulse 1901 by the signal 1815 for energizing switch 1804 represents.

Thus, exist and the information of the Amplitude correlation of picture point n-2 and can be by switch 1812Be transmitted to output stage 1806.

At the latest in the moment:

T₁=T_p-t_c

The image information of picture point n-1 keeps level to carry out buffer memory by the sampling of switch 1801.

Thus, for the unit 1813 for improving contrast is at moment T₁Provide and current picture pointThe information of the Amplitude correlation of the amplitude of n-2 and follow-up picture point n-1. Thus, right for improvingCan determine the switching of switch 1812 than the unit of degree 1813 in the case of known edge slope timeCarve.

Effectively compensate thus the fuzzy effect between each picture point, and thus consuminglyImprove the contrast between the picture point of different brightness.

Duration t_cEstimation can carry out approx at the situation next stage of following hypothesis: at input signalU_iGreat-jump-forward change time, electric current I_LaserRising be linear about the time. Suitable approx thusWith:

$t_c=\frac{|I_{n-1}-I_{n-2}|}{I_{\max }-I_{\min }}\·t_{\mathrm{rf}}$

Wherein I represents intensity and t_rfRepresent liter or edge on edge to decline the required time.

Need the feelings of higher modulated current than current picture point n-2 for follow-up picture point n-1Condition, preferably obtains:

t_c=0。

This means: only have in the time that two adjacent picture point have luminance difference the time model of picture pointEnclose just coupling. The method is used for raising the efficiency or brightness of image.

Figure 20 shows the sequential chart of the projection of picture point associated from Figure 18, based on different brightness.Especially, picture point n-1 only has the brightness slightly reducing with respect to picture point n-2.

The rising edge of signal 1814 and 1815 is used for the time synchronized with fundamental clock. Signal 1816Again preferably corresponding to the signal operating by delay link.

Between the rising edge of signal 1815 and the rising edge of signal 1816 and at signal 1814Time difference between the trailing edge of rising edge and signal 1816 is the figure with picture point in succession according to colorPicture is information-related.

Below exemplarily consider the transition of picture point n-2 to picture point n-1.

The clearest and the most definite in the situation that, the amplitude difference correspondence between two picture point in succession in timeIn the maximum dynamic response of output stage 1806. Owing to supposing: by constant electric current I_LaserComeParasitic capacitance to laser diode recharges, so produced the electric current that runs through by laser diodeThe edge of limited slope. Upper corresponding at signal 1814 of maximum rise time or fall timeRise the duration t between edge and the trailing edge of signal 1816_r. Maximum rise time or fall time are excellentChoosing is known for system.

Duration t_cShow output signal I_LaserNeed to how long set up or eliminate in adjacent picture pointBetween amplitude difference. Time difference between the rising edge of signal 1814 and the trailing edge of signal 1816Be derived as thus:

Δt=t_r-t_c

In the case of the amplitude peak between adjacent image point is poor, this time difference Δ t=0.

In Figure 20, the transition from picture point n to picture point n+1, this relation is shown.

Thus, can consider duration t_rAnd time buffering, this time buffering is disappeared according to amplitude differenceRemove.

Especially, thus at duration t_rAnd between amplitude difference, there is relation, make duration t_cAt every turn fromPicture point is recalculated by electronic installation during to transition between next picture point. Preferably,This carries out in real time.

Corresponding to the relevant form of implementation of the relation between above-mentioned and signal 1816 and 1814, can retouchState the relation between signal 1815 and 1816.

Figure 21 illustrates for the unit 2107 by for improving contrast and carry out excitation laser2112 one can alternative expansion scheme.

Figure 21 shows two digital/analog converters 2101 and 2102, they applied respectively withDID 2104 and 2105. Switch 2108 is at digital/analog converter 2101 or 2102Analog output between switch, and by respectively connect analog signal be connected with output stage 2110.

Output stage 2110 comprises driver 2111, laser instrument 2112 and the power supply for this laser instrument2113。

In addition, be provided with time-controlling arrangement 2103, it is by data signal 2106 parametrizations, whereinThe output of time-controlling arrangement 2103 provides signal for the unit 2107 for improving contrast.

Comprise two inputs for the unit 2107 that improves contrast, one of them and digital-to-analogThe output of converter 2101 or 2102 is connected. Be used for the output of the unit 2107 that improves contrastEnd provides signal to carry out energizing switch 2108.

Be according to the advantage of the circuit of Figure 21: can economize according to the switch 1801 and 1804 of Figure 18Go, because the range value of adjacent picture point is carried by digital/analog converter 2101 and 2102 respectivelyConfession, and be kept in the time period given in advance.

At this, advantageously: to the each maximum in digital/analog converter 2101 and 2102Required processing speed reduces with respect to the digital/analog converter 1802 of Figure 18, be therefore numeral/Analog converter 2101 and 2102 provides the following time period to change:

2·T_p-t_c

As set forth in conjunction with Figure 18 and 19 above, the switch 1812 in switch 2108(Figure 18)Switching and pixel clock asynchronous.

Figure 22 shows the sequential chart associated with Figure 21. In time-controlling arrangement 2103, becomePixel clock double changing. This frequency improves preferably in electronics mode by edge triggered flip-flopCarry out, this trigger is along with state changes the optionally trailing edge to input clock and rising edgeReact.

For the expression of simplifying, pixel clock is depicted as constant in Figure 22.

Especially, in order to simplify when also can only the trailing edge of double pixel clock be considered asBetween basis. Changed by analog circuit by the definite amplitude difference in unit 2107 for improving contrastBecome the delay (referring to the signal 2201 in Figure 22) of double pixel clock.

By primary signal and signal 2201 combinations having been obtained to optionally arteries and veins of edge by gatePunching.

In Figure 11 and Figure 12, illustrate and to have produced the optionally pulse of edge with definite widthLevel.

The width of the pulse generating is delay Δ t or propagation time corresponding to two signal lines at thisPoor, described signal line finishes in gate (NAND or NOR). Thus, provideTwo edges are as a reference: the output of the rising edge of double pixel clock and the delay circuit of setting forthThe trailing edge of signal. Both cause switch 1812 in switch 2108 or the Figure 18 in Figure 21Switch. Thus, can successfully carry out digital actuation.

Combination: improve spatial coherence and improve contrast

Advantageously combination with one another of the scheme that proposed above.

For example, contrast can be by described above for improving the merit of unit of spatial coherenceCan improve, this unit is preferably encouraged by time-controlling arrangement and (cuts in energizing switch aspect selfParallel operation).

Spatial coherence as described by closed at least one switch in parametrization ground and therewithAt least one sampling being connected keeps level to realize.

Correspondingly, correlation error also can compensate in time-controlling arrangement.

To the compensation of alignment error

Figure 10 shows a kind of possible solution for the spatial coherence of picture point. IfThe parametrization of time-controlling arrangement 1005, by correspondingly given in advance, obtains the phase of the image of projectionThe predeformation of answering.

Can in sub-pixel scope, (be less than in the scope of a picture point) extremely by predeformationThe alignment error of small part ground compensate for optical device or laser instrument.

If the alignment error for example on perspective plane causes the figure being illuminated respectively of each laser instrumentBe more or less the same in a picture point as region, the image information of digital source can be by by each laserSource postpones to come pretreatment each other, and it (is that picture point is correspondingly just being passed through electronic installation that error is compensatedReally be imaged onto on perspective plane).

Additional advantage：

The scheme proposing at this can realize the conversion of data-interface and digital/analog converterRate separates with the high time requirement of the amplitude modulation(PAM) to respective sources (especially laser instrument).

This scheme allows to provide the laser based on " flying spot " method in the situation that having improved picture qualityOptical projection system, because can be with high temporal resolution and thus with height in the case of little errorPosition resolution show picture point.

Another advantage is the more simple and favourable technology realizability of digital/analog converter, andAnd reduce the requirement of the interface to imaging system, because do not need the time quantization of the shortest picture pointAnd do not need thus the multiplication of processing speed.

Another advantage is: required delay needn't specific to color realize and therefore can pass throughThere is the interface of little bit width by the parametrization of each delay-level of three kinds of colors.

Alternatively, also possible that: postpone to carry out for every kind of color separately, make for example phaseAnswer the inexactness of the installation of light source to compensate by control time multiplexing method correspondingly.

Another advantage is, also can realize edge slope being had affect relatively significantly in the situation thatHigh contrast. Simulation electronic dress to the switch time for short and corresponding precipitous edge thusThe requirement of putting reduces. In addition, to will the begging to surrender of technology of analog driver circuitry of modulated current is providedLow.

Known according to above description, embodiments of the invention disclose following technical scheme, but do not limitIn this:

1. 1 kinds of methods at least one light beam of projection of technical scheme,

-wherein at least in part by the maintenance duration of at least one picture point with respect at least oneIndividual other picture point extends.

Technical scheme 2. is according to the method described in technical scheme 1, wherein according to corresponding picture pointThe position of projection extends the maintenance duration of described at least one picture point at least in part.

Technical scheme 3., according to the method described in technical scheme 2, is wherein used at least one digital-to-analogConverter encourages at least one light beam,

-wherein digital/analog converter drives with fundamental clock,

-wherein at least in part extended to its side the maintenance duration of described at least one picture pointFormula is to determine pixel clock by fundamental clock, wherein based on pixel clock by described at least one imageThe maintenance duration of point extends.

Technical scheme 4. is according to the method described in technical scheme 3, and wherein pixel clock is corresponding to substantiallyMany times of the integers of clock.

Technical scheme 5., according to the method one of technique scheme Suo Shu, wherein keeps the durationCan regulate by delay-level.

Technical scheme 6. is according to the method described in technical scheme 5, wherein delay-level by pumping signal,Especially digital stimulus signal encourages.

Technical scheme 7. is according to the method described in technical scheme 6, and wherein delay-level comprises that sampling keepsLevel and time-controlling arrangement, wherein time-controlling arrangement is controlled sampling maintenance level by pumping signal.

Technical scheme 8. is according to the method one of technique scheme Suo Shu, and wherein first of picture pointInformation changes according to the second information.

Technical scheme 9. is according to the method described in technical scheme 8, and wherein the first information of picture point existsDuring the duration of the projection of picture point, change.

Technical scheme 10. is according to the method described in technical scheme 8 or 9, and wherein the first information comprisesFor showing amplitude and/or the brightness of picture point.

Technical scheme 11. is according to the method one of technical scheme 8 to 10 Suo Shu, wherein the second informationComprise amplitude and/or the brightness of at least one follow-up picture point.

Technical scheme 12. is according to the method one of technical scheme 8 to 11 Suo Shu, wherein picture pointThe first information is changed into and is made substantially in the time reaching at least one follow-up picture point, to obtain the second letterBreath.

Technical scheme 13. is according to the method described in technical scheme 12, wherein reaches that at least one is follow-upPicture point comprise one of following standard:

-reaching at least one follow-up picture point, soon before or in the near future;

-substantially reach the space given in advance to picture point stretch in, soon before or notFor a long time.

Technical scheme 14., according to the method one of technical scheme 8 to 13 Suo Shu, is wherein provided with useIn the memory of at least one picture point, for by the first information of picture point and the second information comparison.

Technical scheme 15. is according to the method described in technical scheme 14, and wherein memory comprises two friendshipsSampling for excitation keeps level.

Technical scheme 16. is according to the method one of technical scheme 8 to 15 Suo Shu, be wherein provided with toFew two digital/analog converters, they are exciting light beam alternately, for believing first of picture pointBreath and the second information comparison.

Technical scheme 17. is according to the method one of technical scheme 8 to 16 Suo Shu, wherein picture pointThe first information changes according to the second information, its mode be substantially in the end of picture point from imageIn the duration of point, deduct the fall time required to trailing edge.

Technical scheme 18. is according to the method one of technique scheme Suo Shu, wherein at least one light beamParameter turns to and makes compensating image error.

Technical scheme 19. is according to the method described in technical scheme 18, wherein at least one light beamEach maintenance duration be adjusted to each that make at least one light beam project to rightShould be in the region of associated respectively picture point.

Technical scheme 20. is according to the method one of technique scheme Suo Shu, wherein said at least oneLight beam is by the projection arrangement deflection partly of deflection.

Technical scheme 21. is according to the method described in technical scheme 20, the wherein projection arrangement bag of deflectionDraw together micro mirror, especially two-dimentional resonance micro mirror.

Technical scheme 22. is according to the method one of technique scheme Suo Shu, wherein said at least oneLight beam is made up of at least one light source.

Technical scheme 23. is according to the method described in technical scheme 22, wherein said at least one light sourceComprise at least one laser instrument, especially at least one laser diode.

Technical scheme 24. is according to the method one of technique scheme Suo Shu, and wherein light beam is red by oneLook laser, a blue laser and a green laser composition.

Technical scheme 25. is according to the method one of technique scheme Suo Shu, and wherein light beam is red by oneLook laser, a blue laser and two green laser compositions.

Technical scheme 26. is according to the method one of technique scheme Suo Shu, wherein said at least oneLight beam carrys out projection by flying spot method.

27. 1 kinds of devices at least one light beam of projection of technical scheme, it comprises processor unitAnd/or the circuit arrangement being fixedly connected with and/or the logic circuit that can freely programme, this logic circuit is establishedCount and make it possible to carry out according to the method one of technique scheme Suo Shu.

28. 1 kinds of devices at least one light beam of projection of technical scheme, comprise delay-level, byThis delay-level can be at least in part by the maintenance duration of at least one picture point with respect at leastAn other picture point extends.

Technical scheme 29., wherein can be by delay-level root according to the device described in technical scheme 28Position according to the projection of picture point accordingly continues the maintenance of at least one picture point at least in partTime lengthening.

Technical scheme 30. is according to the device described in technical scheme 29, comprise for described in encouraging at leastThe digital/analog converter of a light beam,

-wherein can drive digital/analog converter by fundamental clock,

-wherein can at least in part be extended to its side the maintenance duration of at least one picture pointFormula is can determine pixel clock by fundamental clock, wherein can be based on pixel clock by least describedThe maintenance duration of a picture point extends.

Technical scheme 31. is according to the device described in technical scheme 30, and wherein pixel clock is corresponding to baseMany times of the integers of this clock.

Technical scheme 32. is according to the device one of technical scheme 28 to 31 Suo Shu, wherein delay-level energyEnough encourage by pumping signal, especially digital stimulus signal.

Technical scheme 33. is according to the device described in technical scheme 32, and wherein delay-level comprises sampling guarantorHold level and time-controlling arrangement, wherein time-controlling arrangement keeps level by pumping signal control sampling.

Technical scheme 34., according to the device one of technical scheme 28 to 33 Suo Shu, comprises for improvingThe unit of contrast, wherein the first information of picture point can change according to the second information.

Technical scheme 35. is according to the device described in technical scheme 34, the wherein first information of picture pointDuring the duration of the projection of picture point, change.

Technical scheme 36. is according to the device described in technical scheme 34 or 35, wherein first information bagDraw together amplitude and/or brightness for showing picture point.

Technical scheme 37. is according to the device one of technical scheme 34 to 36 Suo Shu, wherein the second informationComprise amplitude and/or the brightness of at least one follow-up picture point.

Technical scheme 38. is according to the device one of technical scheme 34 to 37 Suo Shu, wherein picture pointThe first information can be changed into and make substantially in the time reaching at least one follow-up picture point, to obtainTwo information.

Technical scheme 39. is according to the device described in technical scheme 38, wherein reach described at least oneFollow-up picture point comprises one of following standard:

-reaching in described at least one follow-up picture point, soon before or in the near future;

-substantially reach the space given in advance to picture point stretch in, soon before or notFor a long time.

Technical scheme 40., according to the device one of technical scheme 34 to 39 Suo Shu, is wherein provided with useIn the memory of at least one picture point, for by the first information of picture point and the second information comparison.

Technical scheme 41. is according to the device described in technical scheme 40, and wherein memory comprises two friendshipsSampling for excitation keeps level.

Technical scheme 42. is according to the device one of technical scheme 34 to 41 Suo Shu, be wherein provided with toFew two digital/analog converters, they encourage alternately exciting light beam, for by the of picture pointOne information and the second information comparison.

Technical scheme 43. is according to the device one of technical scheme 34 to 42 Suo Shu, wherein picture pointThe first information can change according to the second information, its mode be substantially in the end of picture point fromIn the duration of image, deduct the fall time required to trailing edge.

Technical scheme 44. is according to the device one of technical scheme 28 to 43 Suo Shu, at least wherein saidA light beam can be parameterized for making compensating image error.

Technical scheme 45. is according to the device described in technical scheme 44, and wherein at least one light beam is everyThe maintenance duration of one is adjusted to by delay-level each that make at least one light beam and throwsShadow is in the region of the picture point corresponding to associated respectively.

Technical scheme 46. is according to the device one of technical scheme 28 to 45 Suo Shu, the wherein throwing of deflectionImage device is designed at least one light beam described in deflection partly.

Technical scheme 47. is according to the device described in technical scheme 46, the wherein projection arrangement bag of deflectionDraw together micro mirror, especially two-dimentional resonance micro mirror.

Technical scheme 48. is according to the device one of technical scheme 28 to 47 Suo Shu, at least wherein saidA light beam is made up of at least one light source.

Technical scheme 49. is according to the device described in technical scheme 48, wherein said at least one light sourceComprise at least one laser instrument, especially at least one laser diode.

Technical scheme 50. is according to the device one of technical scheme 28 to 49 Suo Shu, and wherein light beam is by oneIndividual red laser, a blue laser and a green laser composition.

Technical scheme 51. is according to the device one of technical scheme 28 to 50 Suo Shu, and wherein light beam is by oneIndividual red laser, a blue laser and two green laser compositions.

Technical scheme 52. is according to the device one of technical scheme 28 to 51 Suo Shu, and it is by flying spot sideMethod is carried out at least one light beam described in projection.

Reference numeral table

101 red light sources

102 blue-light sources

103 green light sources

104 deflecting mirrors

105 deflecting mirrors

106 deflecting mirrors

107 micro mirrors, especially two-dimentional resonance micro mirror

108 planes of delineation

The beam change procedure of 109 projection beams in the plane of delineation

110 total beams, projection beam

201 show each picture point in seconds for ground relevant to the position of respective image point

The curve of the sweep time range of one row

202 show each picture point in seconds for ground relevant to the position of respective image point

The curve of the sweep time range of a line

The driving voltage of 501 laser instruments

502 laser diode currents

503 switchs on delay

504 turn-off delays

505 switchs on delay

506 turn-off delays

601 digital/analog converters (DAC)

602 drivers

603 laser instruments

604 power supplys (VDD)

605 data signals

701 digital/analog converters (DAC)

702 drivers

703 laser instruments

704 power supplys (VDD)

705 data signals

706 delay-level

1001 delay-level

1002 digital/analog converters

1004 switches (keeping level with sampling)

1005 time-controlling arrangements

1006 output stages

1007 drivers

1008 laser instruments

1009 power supplys

1010 data signals

1011 pumping signals

1101 delay-level

1102 phase inverters

1103NAND door

1104 delay-level

1105 phase inverters

1106NOR door

1301 pixel clocks

1302 control signals (control parameter)

1303 according to the frame of Figure 11

1304 signals on the output of NAND door

1305 signals on the output of NOR door

1306 unit for generation of pulse (impulse generator)

1307 phase inverters

1308NAND door

1309 phase inverters

1310NOR door

1311 phase inverters

1312 signals on the output of phase inverter 1311

1313 signals on the output of NOR door 1310

1314 triggers (rest-set flip-flop)

1315 pumping signals

1701 songs with balanced contrast relevant with rise time at edge or fall timeLine change procedure

The 1702 not songs of contrast with compensation relevant with rise time at edge or fall timeLine change procedure

1703 relevant with rise time at edge or fall time are with balanced contrast ratioCurvilinear motion process

1704 not contrast with the compensation ratios relevant with rise time at edge or fall timeThe curvilinear motion process of value

1705 is relevant to rise time at edge or fall time undesirable edgeThe energy loss that compensation causes and luminance loss's thus curvilinear motion process

1801 switches (keeping level with sampling)

1802 digital/analog converters

1804 switches (keeping level with sampling)

1805 time-controlling arrangements

1806 output stages

1807 drivers

1808 laser instruments

1809 power supplys

1810 data signals (with n bit width)

1811 digital stimulus signal

1812 switches (switch)

1813 for improving the unit of contrast

1814 samplings for trigger switch 1801 keep the signal of level

1815 samplings for trigger switch 1804 keep the signal of level

1816 switching signals for change-over switch 1812

1817 for encouraging the signal of the unit 1813 for improving contrast

1901 pulses

2101 digital/analog converters

2102 digital/analog converters

2103 time-controlling arrangements

2104 DIDs

2105 DIDs

2106 data signals (for by time-controlling arrangement 2103 parametrizations)

2107 for improving the unit of contrast

2108 switch

2110 output stages

2111 drivers

2112 laser instruments

2113 power supplys

2201 inhibit signals

Claims (52)

1. for the method for at least one light beam of projection,

-wherein at least in part the maintenance duration of at least one picture point is extended with respect at least one other picture point;

-wherein at least in part the maintenance duration of described at least one picture point is extended according to the position of the projection of corresponding picture point;

-wherein keep the duration to regulate by delay-level; And

-wherein to go the image building in the case of pressing, the middle part that total beam is expert at is than faster in border area.

2. method according to claim 1, wherein encourages at least one light beam with at least one digital/analog converter

-wherein digital/analog converter drives with fundamental clock,

-wherein at least in part the maintenance duration of described at least one picture point being extended, its mode is to determine pixel clock by fundamental clock, wherein based on pixel clock, the maintenance duration of described at least one picture point is extended.

3. method according to claim 2, wherein pixel clock is corresponding to the integral multiple of fundamental clock.

4. method according to claim 1, wherein delay-level encourages by pumping signal.

5. method according to claim 4, wherein said pumping signal is digital stimulus signal.

6. method according to claim 4, wherein delay-level comprises that sampling keeps level and time-controlling arrangement, wherein time-controlling arrangement is controlled sampling maintenance level by pumping signal.

7. according to the method described in any one in claim 1 to 6, the first information of wherein said at least one picture point changes according to the second information.

8. method according to claim 7, the first information of wherein said at least one picture point changes during the duration of the projection of described at least one picture point.

9. method according to claim 7, wherein the first information comprises amplitude and/or the brightness for showing described at least one picture point.

10. method according to claim 7, wherein the second information comprises amplitude and/or the brightness of at least one follow-up picture point of described at least one picture point.

11. methods according to claim 7, the first information of wherein said at least one picture point is changed into and make to obtain the second information in the time being reached at least one follow-up picture point of described at least one picture point.

12. methods according to claim 11, at least one the follow-up picture point that wherein reaches described at least one picture point comprises one of following standard:

-reaching at least one follow-up picture point of described at least one picture point, soon before or in the near future;

-reach the space given in advance to described at least one picture point stretch in, soon before or in the near future.

13. methods according to claim 7, are wherein provided with the memory at least one picture point, for by the first information of described at least one picture point and the second information comparison.

14. methods according to claim 13, wherein memory comprises that the sampling of two alternative excitations keeps level.

15. methods according to claim 7, are wherein provided with at least two digital/analog converters, and alternately exciting light beam of described two digital/analog converters, for by the first information of described at least one picture point and the second information comparison.

16. methods according to claim 7, the first information of wherein said at least one picture point changes according to the second information, and its mode is from the duration of described at least one picture point, to deduct the fall time required to trailing edge in the end of described at least one picture point.

17. according to the method described in any one in claim 1 to 6, and wherein at least one light beam parameters turns to and makes compensating image error.

18. methods according to claim 17, each that is wherein adjusted so that at least one light beam for each maintenance duration of at least one light beam projects to the region corresponding to associated respectively picture point.

19. according to the method described in any one in claim 1 to 6, and wherein said at least one light beam is by the projection arrangement deflection partly of deflection.

20. methods according to claim 19, wherein the projection arrangement of deflection comprises micro mirror.

21. methods according to claim 20, wherein said micro mirror is two-dimentional resonance micro mirror.

22. according to the method described in any one in claim 1 to 6, and wherein said at least one light beam is made up of at least one light source.

23. methods according to claim 22, wherein said at least one light source comprises at least one laser instrument.

24. methods according to claim 23, wherein said at least one laser instrument is at least one laser diode.

25. according to the method described in any one in claim 1 to 6, and wherein said at least one light beam is made up of a red laser, a blue laser and a green laser, or is made up of a red laser, a blue laser and two green lasers.

26. according to the method described in any one in claim 1 to 6, and wherein said at least one light beam carrys out projection by flying spot method.

27. 1 kinds of devices at least one light beam of projection, comprise delay-level, can at least in part the maintenance duration of at least one picture point be extended with respect at least one other picture point by this delay-level, wherein at least in part the maintenance duration of described at least one picture point be extended according to the position of the projection of corresponding picture point; Wherein, in the case of the image building by row, the middle part that total beam is expert at is than faster in border area.

28. devices according to claim 27, wherein encourage at least one light beam with at least one digital/analog converter

-wherein digital/analog converter drives with fundamental clock,

-wherein at least in part the maintenance duration of described at least one picture point being extended, its mode is to determine pixel clock by fundamental clock, wherein based on pixel clock, the maintenance duration of described at least one picture point is extended.

29. devices according to claim 28, wherein pixel clock is corresponding to the integral multiple of fundamental clock.

30. devices according to claim 27, wherein delay-level encourages by pumping signal.

31. devices according to claim 30, wherein said pumping signal is digital stimulus signal.

32. devices according to claim 30, wherein delay-level comprises that sampling keeps level and time-controlling arrangement, wherein time-controlling arrangement is controlled sampling maintenance level by pumping signal.

33. devices according to claim 27, comprise the unit for improving contrast, and the first information of wherein said at least one picture point can change according to the second information.

34. devices according to claim 33, the first information of wherein said at least one picture point changes during the duration of the projection of described at least one picture point.

35. devices according to claim 33, wherein the first information comprises amplitude and/or the brightness for showing described at least one picture point.

36. devices according to claim 33, wherein the second information comprises amplitude and/or the brightness of at least one follow-up picture point of described at least one picture point.

37. devices according to claim 33, the first information of wherein said at least one picture point is changed into and make to obtain the second information in the time being reached at least one follow-up picture point of described at least one picture point.

38. according to the device described in claim 37, and at least one the follow-up picture point that wherein reaches described at least one picture point comprises one of following standard:

-reaching at least one follow-up picture point of described at least one picture point, soon before or in the near future;

-reach the space given in advance to described at least one picture point stretch in, soon before or in the near future.

39. devices according to claim 33, are wherein provided with the memory at least one picture point, for by the first information of described at least one picture point and the second information comparison.

40. according to the device described in claim 39, and wherein memory comprises that the sampling of two alternative excitations keeps level.

41. devices according to claim 33, are wherein provided with at least two digital/analog converters, and alternately exciting light beam of described two digital/analog converters, for by the first information of described at least one picture point and the second information comparison.

42. devices according to claim 33, the first information of wherein said at least one picture point changes according to the second information, and its mode is from the duration of described at least one picture point, to deduct the fall time required to trailing edge in the end of described at least one picture point.

43. according to the device described in claim 27 or 33, and wherein said at least one light beam can be parameterized for making compensating image error.

44. according to the device described in claim 43, and each that is wherein adjusted so that at least one light beam for each maintenance duration of at least one light beam projects to the region corresponding to associated respectively picture point.

45. according to the device described in claim 27 or 33, and wherein the projection arrangement of deflection is designed at least one light beam described in deflection partly.

46. according to the device described in claim 45, and wherein the projection arrangement of deflection comprises micro mirror.

47. according to the device described in claim 46, and wherein said micro mirror is two-dimentional resonance micro mirror.

48. according to the device described in any one in claim 27 to 32, and wherein said at least one light beam is made up of at least one light source.

49. according to the device described in claim 48, and wherein said at least one light source comprises at least one laser instrument.

50. according to the device described in claim 49, and wherein said at least one laser instrument is at least one laser diode.

51. according to the device described in any one in claim 27 to 32, and wherein said at least one light beam is made up of a red laser, a blue laser and a green laser, or is made up of a red laser, a blue laser and two green lasers.

52. according to the device described in any one in claim 27 to 32, and wherein said at least one light beam carrys out projection by flying spot method.