CN105223762B - Light source output control method, system and laser projection device - Google Patents

Light source output control method, system and laser projection device Download PDF

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Publication number
CN105223762B
CN105223762B CN201510738951.3A CN201510738951A CN105223762B CN 105223762 B CN105223762 B CN 105223762B CN 201510738951 A CN201510738951 A CN 201510738951A CN 105223762 B CN105223762 B CN 105223762B
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Prior art keywords
colour wheel
wheel
colour
sync mark
light source
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CN201510738951.3A
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CN105223762A (en
Inventor
崔荣荣
林信宏
李健锋
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Qingdao Hisense Laser Display Co Ltd
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Hisense Group Co Ltd
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Priority to CN201510738951.3A priority Critical patent/CN105223762B/en
Publication of CN105223762A publication Critical patent/CN105223762A/en
Priority to US15/202,797 priority patent/US9832433B2/en
Application granted granted Critical
Publication of CN105223762B publication Critical patent/CN105223762B/en
Priority to US15/803,126 priority patent/US10006610B2/en
Priority to US15/942,069 priority patent/US10234108B2/en
Priority to US15/941,889 priority patent/US10260709B2/en
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    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03BAPPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00Projectors or projection-type viewers; Accessories therefor
    • G03B21/14Details
    • G03B21/20Lamp housings
    • G03B21/2006Lamp housings characterised by the light source
    • G03B21/2033LED or laser light sources
    • G03B21/204LED or laser light sources using secondary light emission, e.g. luminescence or fluorescence
    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03BAPPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00Projectors or projection-type viewers; Accessories therefor
    • G03B21/14Details
    • G03B21/20Lamp housings
    • G03B21/2053Intensity control of illuminating light
    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03BAPPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00Projectors or projection-type viewers; Accessories therefor
    • G03B21/14Details
    • G03B21/20Lamp housings
    • G03B21/206Control of light source other than position or intensity

Abstract

The present invention discloses a kind of light source output control method, non-coaxial it is provided with the first colour wheel and the second colour wheel, first labelling and the second labelling are respectively arranged with two colour wheels, according to first group of induced signal of the first sync mark obtaining and the second sync mark, synchronization the first colour wheel and the second colour wheel;And obtain the second induced signal from the second colour wheel output light path, according to the second induced signal subsynchronous first colour wheel and the second colour wheel again, wherein, described second induced signal is the voltage waveform signal of corresponding different colours, export three primary colours through the second colour wheel timing, be capable of the accurate synchronization of two colour wheels, eliminate the mixed color phenomenon in the second colour wheel output procedure, improve the monochromatic purity of three primary colours and brightness, using the teaching of the invention it is possible to provide high-quality lighting source.Present invention also offers the control system of corresponding above-mentioned light source output control method, and the laser projection device applying above-mentioned control system and method.

Description

Light source output control method, system and laser projection device
Technical field
The present invention relates to LASER Light Source technical field, the double-colored wheel synchronisation control means of more particularly, to a kind of light source, system And laser projection device.
Background technology
The LASER Light Source using in industry at present is made up of the fluorescence that laser and fluorescent material are excited to produce, generally by blueness Laser, as excitation radiant, also serves as the blue light of one of red-green-blue simultaneously.Fluorescent wheel is a kind of Wavelength converter, In order to produce the other two kinds of primary lights in addition to blue light.In a kind of implementation of prior art, blue laser is got to glimmering Green emitting phosphor and yellow fluorescent powder can be excited on halo to produce green light and sodium yellow, and the green filter through filter wheel respectively Mating plate and Red lightscreening plate colour filter obtain green and red light, and blue laser does not need colour filter, are directed through fluorescent wheel and colour filter The bright zone of wheel enters light path system, thus final export red-green-blue from filter wheel.
If blue laser passes through fluorescent wheel or does not pass through below according to the mode setting after fluorescent wheel exports fluorescence The corresponding position of filter wheel, such as when fluorescent wheel starts to export green glow, filter wheel rotates to HONGGUANG filter area, then cannot be normal Output green monochromatic light, double-colored wheel plane color subregion schematic diagram as shown in Figure 1, solid line represents the first colour wheel(Fluorescent wheel)'s Color partition boundaries, dotted line represents the second colour wheel(Filter wheel)Color partition boundaries, by diagram understand two colour wheels subregion Boundary line does not complete to overlap, but at an angle, because the color subregion on two colour wheels and order are fixing, a kind of color Demarcation line that is marginal misaligned and then leading to other two kinds of colors also misaligned, offset same angle.In colour wheel rotation During turning, light passes through the region of angle skew, results in colour mixture, and forms three time periods in a swing circle The colour mixture phase, needing removal colour mixture only to retain monochromatic light could use as lighting source.
Above understand, the generation of mixed color phenomenon is due primarily to the asynchronous of double-colored wheel and causes.
A kind of mode removing colour mixture in prior art is to adopt coaxial configuration to double-colored wheel, that is, coaxially connected, this Need under frame mode accurately to correspond to the boundary line of the same color subregion in fluorescent material wheel and filter wheel, that is, identical on two-wheeled Projection that color subregion boundary line is axially gone up overlaps, but because assembly technology difficulty is high, by processing and installing cause inclined Shift error will be existed all the time due to the fixation of two colour wheels and rotating shaft, and the mixed color phenomenon that this error causes can only be by during by colour mixture Section rejects the purity and timing to ensure color output, thus causing the reduction of monochromatic brightness.
Need to propose a kind of output intent of light source, mixed color phenomenon can be eliminated and ensure each monochromatic output brightness.
Content of the invention
It is an object of the invention to provide a kind of light source output control method, system and laser projection device, solve light source defeated Go out mixed color phenomenon during three primary colours.
The purpose of the present invention is achieved through the following technical solutions:
Propose a kind of light source output control method, be applied to light source output, this light source includes laser instrument, the first colour wheel and Two colour wheels, laser instrument sends laser, irradiates described first colour wheel and produces fluorescence, laser and fluorescence pass through phase on the second colour wheel respectively Corresponding color subregion outgoing, the first colour wheel and the second colour wheel have identical color subregion, and the first colour wheel and the second color First sync mark, the second sync mark are respectively provided with wheel, wherein, the first sync mark and the second sync mark are respectively with The same position alignment of color wheel and the second colour wheel;This output control method includes:
According to first group of induced signal of the first sync mark obtaining and the second sync mark, synchronous first colour wheel and the Two colour wheels;
Obtain the second induced signal from the second colour wheel output light path, and according to the second induced signal subsynchronous first color again Wheel and the second colour wheel, wherein, the second induced signal is the voltage waveform signal of corresponding different colours;
Export three primary colours through the second colour wheel timing.
A kind of light source output control system is proposed, including laser instrument, the first colour wheel and the second colour wheel, it is separately positioned on first The second sync mark in the first sync mark and the second colour wheel on colour wheel, wherein, the first sync mark and the second synchronization are marked Score and not do not align with the same position of the first colour wheel and the second colour wheel;
First sensor, and second sensor, are respectively used to detect and obtain the first sync mark, the second sync mark First group of induced signal;
Control unit, for according to synchronous first colour wheel of first group of induced signal and the second colour wheel;
3rd sensor, for obtaining the second induced signal from the second colour wheel output light path, wherein, the second induced signal Voltage waveform signal for corresponding different colours.
And, control unit is additionally operable to according to the second induced signal subsynchronous first colour wheel and the second colour wheel again.
A kind of laser projection device is proposed, including above-mentioned light source output control system.
Embodiment of the present invention technical scheme, its technique effect having or advantage are:
The light source output control method that the embodiment of the present invention proposes, by being respectively provided with the first colour wheel and the second colour wheel First sync mark, the second sync mark, first group of induced signal of the above-mentioned sync mark of correspondence according to acquisition, wherein, the One group of induced signal show respectively the synchronization extent of the first sync mark under synchronization and the second sync mark, due to One sync mark and the second sync mark are alignd with the same position of the first colour wheel and the second colour wheel respectively, can be on this basis Synchronous first colour wheel and the second colour wheel, above-mentioned synchronization is the preliminary synchronisation based on sync mark;And, from the second colour wheel output light The second induced signal is obtained, the second induced signal is the voltage waveform signal of corresponding different colours, due to laser and fluorescence in road It is the monochromatic light of three kinds of colors, the therefore second induced signal includes the voltage waveform of at least three kinds different amplitudes, and due to mark The voltage jump situation of the color intersection that note rigging error causes, i.e. the colour mixture period, can be according to the actual feelings of color output Condition is subsynchronous again, and by the output three primary colours monochromatic light of the second colour wheel timing, above-mentioned light source output control method can be passed through Two subsynchronous effective elimination mixed color phenomenons, and ensure that the colour brightness of three primary colours and timing from the second colour wheel output.
The invention allows for a kind of synchronous control system corresponding to above-mentioned synchronisation control means, can be subsynchronous by two Effectively eliminate mixed color phenomenon, and ensure that the colour brightness of three primary colours and timing from the second colour wheel output.
The invention allows for a kind of laser projection device, based on light source output control method and system, can effectively disappear Except mixed color phenomenon, and ensure to export colour brightness and the timing of three primary colours, beneficial to the color saturation improving projected image and Display quality.
Brief description
Fig. 1 is double-colored wheel plane color subregion schematic diagram in prior art;
Fig. 2 is the LASER Light Source structural representation with non-coaxial double-colored wheel that the embodiment of the present invention 1 proposes;
Fig. 3 is a kind of corresponding relation schematic diagram with labelling for colour wheel of the embodiment of the present invention 1 proposition;
Fig. 4 is the corresponding relation schematic diagram with labelling for another colour wheel of the embodiment of the present invention 1 proposition;
Fig. 5 is the light source output control method flow chart that the embodiment of the present invention 1 proposes;
Fig. 6 is the light source output control method decomposition process figure that the embodiment of the present invention 2 proposes;
Fig. 7 is the oscillogram of first group of induced signal in the embodiment of the present invention 2;
Fig. 8 is double-colored wheel just subsynchronous rear schematic diagram in the embodiment of the present invention 2;
Fig. 9 is the pulse signal schematic diagram in the embodiment of the present invention 2;
Figure 11 is sync mark rigging error schematic diagram;
Figure 10 is the another light source output control method decomposition process figure proposing in the embodiment of the present invention 2;
Figure 12 is the embodiment of the present invention 2 second induced signal voltage waveform view;
Figure 13 is the light source output control system frame diagram that the embodiment of the present invention 3 proposes;
Figure 14 is the schematic diagram of the laser projection device that the embodiment of the present invention 4 proposes;
Figure 15 is LASER Light Source structural representation in the embodiment of the present invention 4.
Specific embodiment
In order that the object, technical solutions and advantages of the present invention are clearer, below in conjunction with accompanying drawing the present invention is made into One step ground describes in detail it is clear that described embodiment is only a part of embodiment of the present invention, rather than whole enforcement Example.Based on the embodiment in the present invention, those of ordinary skill in the art are obtained under the premise of not making creative work All other embodiment, broadly falls into the scope of protection of the invention.
Below in conjunction with accompanying drawing, technical scheme provided in an embodiment of the present invention is described in detail.
Embodiment one
The present invention is intended to provide a kind of light source output control method, it is applied in the light source of the non-coaxial design of double-colored wheel.Should Light source is as shown in Fig. 2 include laser instrument 0, the first colour wheel 1 and the second colour wheel 2.Wherein, laser instrument 0 sends laser, irradiates first Colour wheel 1 produces fluorescence, and laser and fluorescence pass through corresponding color subregion outgoing on the second colour wheel 2 respectively.First colour wheel 1 and Two colour wheels 2 have identical color subregion, thus laser can divide through two colour wheels corresponding identical color with the period with fluorescence Area.
The non-coaxial positional structure exemplary relationship of double-colored wheel can be as shown in Fig. 2 the first colour wheel 1 and the second colour wheel 2 connect respectively It is connected to drive motor rotating shaft 12 and 22 to drive wheel face to do periodic rotational movements, wherein, in drive motor rotating shaft 12 and 22 Heart extended line intersects at an angle, can be acute angle, right angle or obtuse angle, perpendicular relation in this example.That is, the first color The rotating shaft of wheel 1 and the second colour wheel 2 is non-coaxial, and accordingly, two colour wheel wheel face place planes are not space parallel relation, but phase Hand at an angle.In the illustrated example shown in fig. 2, only give the first colour wheel and a kind of position setting of the second colour wheel rotating shaft is closed System, does not limit and this.
Wherein, the first colour wheel can be fluorescent wheel, and fluorescent wheel has green emitting phosphor area, blue laser transmission area, Huang Color fluorescent material area(Because red fluorescence powder launching efficiency is low, therefore substituted with yellow fluorescent powder, but obtained according to its final filtration red The effect of light is still referred to as red subregion), the second colour wheel can be filter wheel, and filter wheel has green color area, blue sharp Transmitance region, red color filter area respectively with fluorescent wheel on green emitting phosphor area, blue laser transmission area, yellow fluorescent powder area have Identical angle and order is had to be distributed.Wherein red color filter area is corresponding with yellow fluorescent powder area, for filtering from yellow fluorescence Obtain red fluorescence, thus being sequentially output red, green, blue three primary colours from filter wheel.
Specifically, the first sync mark 11 is provided with the first colour wheel 1, the second colour wheel 2 is provided with second synchronous Labelling 21, specifically be located at the drive motor side surface of the first colour wheel and the second colour wheel respectively.And, the first sync mark 11 the position on each affiliated colour wheel is corresponding with the second sync mark 21.Due to having on the first colour wheel and the second colour wheel Corresponding color subregion is it will usually using color subregion as reference, the first sync mark 11 and the second sync mark 12 be existed Set location in drive motor rotating shaft 12 and 22 is alignd with color subregion a certain on affiliated colour wheel, consequently facilitating comparing two Mark whether that position corresponds to each other.In one kind is embodied as, as shown in figure 3, the first sync mark 11 turns in drive motor The original position of axle 12 side surface and the second sync mark 21 drive motor rotating shaft 22 side surface original position respectively with institute The border belonging to same color subregion on colour wheel aligns, and sets the original position of labelling and the boundary phase of color a certain on colour wheel Alignment, the boundary of this color is the reference original position for labelling on colour wheel, specifically such as, the first sync mark 11 Original position align with the border of the first colour wheel 1 Green subregion, the original position of the second sync mark 21 and the second color The border of the green partition in wheel 2 aligns, and because in colour wheel, color is that subregion is connected with each other, therefore in this example, border is Refer to the demarcation line of two kinds of colors it will be appreciated that being the boundary position of green partition and next color.Those skilled in the art easily manage Solution and derivation, the first sync mark and the second sync mark can also be located at the boundary position of other any two colors, as long as two Any two colors on colour wheel are same case.
Certainly, it is also possible to as shown in figure 4, all with same color boundaries apart from identical in another specific embodiment Displacement, two labellings are in the deviation of φ angle with the border of green partition on two colour wheels respectively, are also marked on two colour wheels The corresponding example in position, now, the RADIAL that colour wheel deviates green partition border φ angle is colour wheel for labelling Reference original position.
Also it has been noted that the first colour wheel and the second colour wheel need each color subregion when rotated in aforementioned prior art Correspond to each other, when the first colour wheel rotates to green partition, the second colour wheel also green partition to be rotated to(Actual functional capability is to green Color carries out colour filter), the color of the light through the second colour wheel outgoing for the guarantee is green, be otherwise likely to occur color overlap and when Sequence is chaotic to be exported it is impossible to normally form three primary colours, and the x ray machine part of rear end also cannot normally parse and modulate primary lights simultaneously normally Display image.
The light source output control method of the embodiment of the present invention is described below in conjunction with Fig. 5.
As shown in figure 5, method comprises the following steps:
Step S1:According to first group of induced signal of the first sync mark obtaining and the second sync mark, synchronous first Colour wheel and the second colour wheel;
In this method step, first group of induced signal show respectively the first sync mark and second under synchronization The synchronization extent of sync mark, due to the first sync mark and the second sync mark phase with the first colour wheel and the second colour wheel respectively Same aligned in position, can synchronous first colour wheel and the second colour wheel on this basis, above-mentioned synchronization is preliminary based on sync mark Synchronous.
Step S2:Obtain the second induced signal from the second colour wheel output light path, and same again according to the second induced signal Walk the first colour wheel and the second colour wheel, wherein, the second induced signal is the voltage waveform signal of corresponding different colours;
Because final light source output three primary colours light, therefore laser and fluorescence are the monochromatic light of three kinds of colors, the second sensing letter Number when obtain from the output light path of the second colour wheel, the therefore second induced signal includes the voltage wave of at least three kinds different amplitudes Shape, and the voltage jump situation of the color intersection being caused due to labelling rigging error, i.e. the colour mixture period, and then being capable of basis The actual colour mixture situation of color output carries out subsynchronous again.
Step S3:Export three primary colours through the second colour wheel timing.
By above-mentioned two subsynchronous after, improve the synchronous degree of accuracy of double-colored wheel, eliminate mixed color phenomenon such that it is able to from The output three primary colours of the normal timing of the second colour wheel, and monochromatic brightness is not affected, and can be follow-up x ray machine part High-quality lighting source is provided.
Embodiment two
The embodiment of the present invention two is the improvement and refinement on the basis of embodiment one.
Wherein, for step S1:According to first group of induced signal of the first sync mark obtaining and the second sync mark, Synchronous first colour wheel and the second colour wheel specifically include as shown in Figure 6:
Step S11:In a swing circle, obtain the sensing of corresponding first sync mark and the second sync mark respectively Signal, is designated as first group of inductive impulse signal.
In this method embodiment, sync mark can be black thin film or black belt or carbonization labelling, and black has The signal that extinction effect, therefore sensor send, during drive motor axis of rotation, runs into above-mentioned rotating shaft side surface Density bullet when be predominantly absorbed, and the unmarked part in motor shaft side then by the signaling reflex that sensor sends return from And be detected by a sensor, therefore, when using sensors to detect the labelling rotation status on the first colour wheel and the second colour wheel, lead to Cross that the optical signal that sensor sends is absorbed and situation about reflecting can sense the first sync mark and the second sync mark There is and formed the pulse signal of low and high level formation, thus in a swing circle, getting corresponding first respectively synchronous The induced signal of labelling, and the induced signal of corresponding second sync mark, this two induced signals are sensed as first group Signal uses.
Here swing circle, refers to the time that two colour wheels each rotate a circle.During system initial start, two colour wheels Accelerate to after identical rotating speed at the uniform velocity rotation in the same direction so that the first sync mark and the second sync mark geo-stationary, so simultaneously Afterwards in a swing circle, obtain first group of induced signal of corresponding first sync mark and the second sync mark respectively.
Step S12:The relatively rising edge of first group of induced signal of synchronization or trailing edge.
In the induced signal of corresponding first sync mark and the second sync mark, include embodiment the first sync mark respectively The rectangular pulse with rising edge or trailing edge existing with the second sync mark.
In a swing circle, if the first colour wheel and the non-synchronous rotary of the second colour wheel, the first sync mark and second Sync mark has position difference in the rising edge of synchronization or trailing edge.Or, show as the first sync mark and the Two sync marks have time difference when same position.
As shown in fig. 7, the first colour wheel and the second colour wheel rotate a circle, the corresponding rectangular pulse of the first sync mark and second The corresponding rectangular pulse of sync mark, on synchronization, the position of pulse has difference, or pulse on same position Beginning and ending time has time difference, shows as in its rising edge of synchronization or trailing edge and misaligned.
Step S13:Rising edge according to first group of induced signal or trailing edge difference, adjustment the first colour wheel and the second color The rotating speed of wheel, makes the rising edge of the first induced signal or trailing edge overlap, completes just subsynchronous.
Specifically, as shown in fig. 7, according to the corresponding inductive waveform of the first sync mark and second in first group of induced signal The corresponding inductive waveform of sync mark, can obtain the time difference between two labellings of two colour wheels, according to time difference Circumferential length difference S between two labellings in two colour wheels can be calculated, wherein, S=2 π nRt, n are rotating speed, and R is labelling To the radius at colour wheel center, t is the time;When two colour wheels at the uniform velocity rotate at the same speed, it is geo-stationary between two-wheeled, then can protect The rotating speed holding one of colour wheel is constant, and adjusts the rotating speed of another colour wheel, and the circumferential length shortening between two labellings is poor Value S, namely shorten the time difference between two labellings, tune can be calculated by the computing formula of rotating speed and circumferential length The whole time, by controlling adjustment time, circumferential length difference S is shorten to zero, then the time difference between two labellings is also Zero, the rotating speed then adjusting two colour wheels more identical at the uniform velocity rotates, thus realizing the synchronization of two colour wheels.Here, only giving A kind of method of adjustment colour wheel rotating speed, it is also possible to the rotating speed of one colour wheel of holding is constant, reduces the rotating speed of another colour wheel, calculating will Circumferential length difference foreshortens to 0 adjustment time, is driven two-wheeled according to same rotating speed after adjustment again.
It should be noted that in this method embodiment, the first sync mark and the second sync mark Main Function are to make For the sync bit labelling setting, can also be calculated according to the number of pulse signal in a swing circle of colour wheel simultaneously Motor shaft is the rotating speed of colour wheel, plays the effect of detection colour wheel rotating speed.So as to the real-time rotating speed obtaining colour wheel, by adjusting Power of whole drive circuit etc. is changing the rotating speed of colour wheel.
Through the Synchronization Control of above-mentioned steps, for two sync marks of same position on corresponding two colour wheels, it is adjusted to Fig. 8 The corresponding pulse signal rising edge of shown two sync marks aligns, that is, the synchronization of two sync marks completing.Due to synchronous mark Corresponding relation in note and colour wheel, also just completes the preliminary synchronisation of two colour wheels.Corresponding color subregion is had on two colour wheels, And the order of color subregion fixes, when colour wheel realizes basic synchronization, that is, the same color subregion of two colour wheels is rotating through In journey also corresponding all the time it is achieved that matching relationship, when the such as first colour wheel rotates to green partition, then the second colour wheel is also proper Good rotation is to green partition, it is achieved thereby that the output of green glow.The synchronous basic goal of double-colored wheel is also to make light in the same time Same color subregion on two colour wheels is passed sequentially through, thus ensureing eventually through each color in the three primary colours of the second colour wheel output in section Timing.
But due to rigging error reason, the first sync mark as the sync bit setting and the second sync mark may Not perfectly aligned with the same position on two colour wheels, same position here is interpreted as default reference original position.Than Position as deviateed green partition border φ angle in the border of Fig. 3 Green subregion or Fig. 4 can not be absolute alignment, can Can there is millimeter or the deviation of more subsection rank, as shown in figure 9, being marked at theoretic setting reference position is in green Partition boundaries GL line, but there may be during practical set and deviate the deviation that former reference position GL is in φ 1 angle, that is, after assembling Labelling is not overlapped with theory setting position completely, then two colour wheels same color original position is also just and be not implemented absolute same Step, then will be still by different in two colour wheels when rotating past in this deviation time section through the light of two colour wheel outgoing Color subregion is although this overlapping region very little, but still can form the mixed light of different colours.This deviation not only shadow simultaneously Ring, to a kind of color, colour mixture occurs, because each color subregion is fixed and corresponded to each other, the dislocation in other words of this overlap can be extended to In two kinds of colors below, lead to other two kinds of colors that colour mixture also occurs, therefore once there being error, for three primary colours, The colour mixture phase of 3 times is had in one cycle.
For eliminating the mixed color phenomenon that this error is brought, also need execution step S2:Obtain from the second colour wheel output light path Second induced signal, and according to the second induced signal subsynchronous first colour wheel and the second colour wheel again.Specifically, as shown in Figure 10, Step S2 comprises the following steps:
S21:Obtain the second induced signal from described second colour wheel output light path;
From the foregoing it will be appreciated that due to there is rigging error as shown in figure 11, when arranging labelling, the first sync mark away from First colour wheel can not be perfectly aligned with reference to original position with the second colour wheel with reference to original position and the second sync mark, then Although the pulse signal causing the sync bit labelling setting is synchronized, the reference original position of two colour wheels is not same One moment was completely superposed.As shown in figure 9, there is t1 with reference to original position in first sync mark rising edge signal distance the first colour wheel The error of time variable, there is t2 time variable with reference to original position in second sync mark rising edge signal distance the second colour wheel Error, wherein, t1, t2 are all higher than equal to 0, if first sync mark distance the first colour wheel with reference to the distance of original position is Zero, just align, then t1=0.Assume t2>T1, then in first group of induced signal after just subsynchronous, the first colour wheel Still there is the error of t2-t1 time variable and the second colour wheel between.This error causes the superposition of color, forms colour mixture color section, Therefore consider from color reality output, so that the first colour wheel and the reference original position of the second colour wheel will be rotated in colour wheel adjusting During synchronization be in alignment with each other, realize the accurate synchronization of the first colour wheel and the second colour wheel.
Second colour wheel exports the light of three kinds of colors, by obtaining the optical signal in this position light path, permissible using sensor Obtain the voltage waveform of at least three kinds different amplitudes, and the voltage jump of the color intersection being caused due to labelling rigging error Situation.
Specifically, obtain the second induced signal oscillogram as shown in figure 12, this error in the second induced signal with Out, because the second induced signal is a voltage waveform signal, different colors has not the Novel presentation of voltage differences change Same brightness, different brightness can be converted to different magnitudes of voltage by sensor, thus different voltage magnitude corresponds to three bases Different colours in color, are to determine due to the voltage magnitude of the output of random color, then between any two kinds of colors, voltage amplitude Value is saltus step, and secondary colour shows as change in voltage unusual part between two kinds of colors.
S22:Obtain the magnitude of voltage bound-time threshold value of described second induced signal;
As shown in Figure 12, determine time variable t2-t1 of two kinds of color voltage magnitude saltus step unusual parts, this saltus step is different Often part is magnitude of voltage bound-time threshold value, and when this time threshold is 0, two colour wheels realize accurate synchronous rotary.One In individual swing circle, there is three such identical time periods, i.e. colour mixture phase.
S23:Adjust the rotating speed of the first colour wheel and the second colour wheel until magnitude of voltage bound-time threshold value is 0 with synchronization institute again State the first colour wheel and the second colour wheel.
Concrete method of adjustment is similar to the method for adjustment to the first colour wheel and the second colour wheel in first synchronizing process, that is, obtain figure Time residual quantity t2-t1 shown in 12, and know the rotating speed of current colour wheel by measurement markers pulse number, according to aforesaid meter Calculate formula to learn, the circumferential length S that two colour wheels need with reference to original position alignment to pass through will be reached, afterwards, with the first colour wheel be Benchmark, adjustment the second colour wheel rotating speed, or, on the basis of the second colour wheel, adjustment the first colour wheel rotating speed, two colour wheels it Between circumferential length difference or after time difference is contracted to 0, the synchronized rotation of two colour wheels of adjustment is so that magnitude of voltage bound-time threshold It is worth for 0, it is achieved thereby that the precise synchronization rotation of double-colored wheel, eliminate two kinds of color voltage magnitude saltus step unusual parts, thus Eliminate two colour wheel labellings because rigging error lead to asynchronous.The asynchronous of indication is with the color of two colour wheel outputs herein Purity is reflecting.
Above-mentioned, the first colour wheel and the second colour wheel first pass through just subsynchronous realize sync bit labelling that two colour wheels set it Between synchronization, eliminate because the priority time sequence difference in two colour wheel sync bit labelling existence times, both arteries and veins under same rotational speed Rush rising edge(Or trailing edge)Overlap and represent that the labelling of dichromatism wheel is synchronized, by the light in the light path to the second colour wheel outgoing Change in voltage situation obtain electric voltage exception situation of change, i.e. the colour mixture time period, thus eliminated by secondary Synchronization Control Set sync bit labelling and the rigging error with reference to original position, reached the accurate synchronization of double-colored wheel, eliminate colour mixture; Compare existing coaxially double-colored wheel synchronisation control means, the Synchronization Control of the double-colored wheel of non-coaxial setting provided in an embodiment of the present invention Method, can be located at the first sync mark of the first colour wheel and the second of the second colour wheel according to the sync bit labelling setting The corresponding induced signal of sync mark carries out first Synchronization Control, and the rigging error for labelling also can be double by adjusting again The rotating speed of the colour wheel change with reference to the colour mixture time is eliminated, thus coaxially double-colored wheel speed is all the time different from prior art Identical and situation that error exists all the time, the motility of the synchronisation control means that the present invention provides is strong, can accurately realize double The synchronization of colour wheel.And, due to two kinds of colors need not be rejected by the way of manually adjusting as in coaxially connected double-colored wheel scheme Between secondary colour, it is possible to increase export monochromatic brightness, also improve the purity of the color of colour wheel output, and system is defeated Go out the color saturation of image.Simultaneously with respect to the mode manually adjusting, the synchronisation control means of the embodiment of the present invention not only saves Save cost of labor, and color Color-sensitive degree difference being led to because of different people in manual adjustment mode can have been eliminated Matching error, substantially increases the precision of the upper color matching of double-colored wheel.
And, when the reference original position on colour wheel is located at color boundaries, the first sync mark and the second sync mark Original position also respectively with corresponding belonging to the same color boundaries of colour wheel align, thus the sensing being obtained according to sensor Signal, not only can weigh the degree of the synchronization of two labellings, the rising edge of its pulse(When effective impulse is high level pulse When)Or trailing edge(When effective impulse is for low level pulse)Also represent this reference original position color initial when Carve, the startup color of system can be known by judging the arriving of pulse signal, due to each color subregion with sequentially on colour wheel Fix, thus the color sequential of system can also be known.Such as, when the green partition border of the first colour wheel, be such as with As during with reference to original position, the original position of the first sync mark corresponds to green partition side on red subregion adjacent border Boundary, accordingly, the original position of the second sync mark aligns corresponding to the green partition border of the second colour wheel, works as sensor Detect the first sync mark and the second sync mark pulse induction signal when it is known that, the rising edge of induced signal pulse or Person's trailing edge represents the beginning of green color, and the order of three primary colours is green, blue, red such output order. In practical application, can be reached by induced indicia come simultaneously right by the set-up mode that labelling and color boundaries align Colour wheel rotating speed is measured, and synchronously compares, and judges the multiple action of color initial time and order.Thus, when double-colored wheel When reaching synchronous, also just reach the purpose that normal timing exports three primary colours.
Embodiment three
Based on above-mentioned light source output control method, the embodiment of the present invention also proposes a kind of light source output control system, such as Shown in Figure 13, including the first colour wheel 21, the first colour wheel 21 includes the first sync mark(In figure is not shown);Second colour wheel 22, the Two colour wheels 22 include the second sync mark(In figure is not shown), the wherein first sync mark is with the second sync mark corresponding affiliated Position on colour wheel is corresponding, and this system also includes first sensor 23, second sensor 24,3rd sensor 25 and controls single Unit 26.
Wherein, first sensor 23, for detect and obtain the first colour wheel the first sync mark induced signal, be red Outer sensor or optical sensor;Second sensor 24, for detect and obtain the second colour wheel the second sync mark sensing Signal, is infrared sensor or optical sensor;Wherein, the sensing of the induced signal of the first sync mark and the second sync mark Signal is designated as first group of induced signal.
Control unit 26, for comparing rising edge or the trailing edge of first group of induced signal of synchronization;And according to first The group rising edge of induced signal or the difference of trailing edge, the rotating speed of adjustment the first colour wheel 21 and the second colour wheel 22 makes first group of sensing The rising edge of signal or trailing edge overlap complete just subsynchronous.
3rd sensor 25, for detecting and obtaining the second induced signal, this second induced signal is a voltage waveform letter Number, the different magnitude of voltage of different colours correspondence;3rd sensor 25 is photosensitive sensors or luminance sensor, is placed in the second colour wheel In 22 output light path;In being embodied as one, the first colour wheel is fluorescent wheel, and the second colour wheel is filter wheel, and 3rd sensor is put In the output light path of filter wheel, obtain the optical signal of the output primary lights after filter wheel colour filter.Control unit 26 is additionally operable to obtain Take the magnitude of voltage bound-time threshold value in the second induced signal, and adjust the rotating speed of the first colour wheel and the second colour wheel until magnitude of voltage Bound-time threshold value is 0.
Specifically, refer again to the positional structure schematic diagram of double-colored wheel in Fig. 2, the first colour wheel 1, second in wherein Fig. 2 Colour wheel 2 is respectively equivalent to the first colour wheel 21 and the second colour wheel 22 in the embodiment of the present invention, the first sync mark 11 He in Fig. 2 Second sync mark 21 is equivalent to the first sync mark and the second sync mark in the embodiment of the present invention.
First sync mark and the second sync mark are sync bit labelling set in advance, are separately positioned on the first colour wheel 21 and second colour wheel 22 drive motor side surface, labelling can be black belt or black thin film or carbonization labelling, using black The principle of color extinction, the light being sent by sensor is absorbed and situation about reflecting knows that the first sync mark and second synchronous is marked The rotational case of note, reflects the first colour wheel and the rotational case of the second colour wheel.In position, the first sync mark and second with Step mark all aligns with reference to original position with each affiliated colour wheel, can situation as shown in Figure 3 or Figure 4, here is no longer superfluous State.
In a particular embodiment, 3rd sensor 25 is photosensitive sensors, luminance signal can be converted to voltage signal, This voltage signal is the second induced signal, can by the situation of the output light after the second colour wheel in the form of a voltage intuitively Embody, different colors has different brightness, thus the waveshape signal of the different voltage magnitude of the second induced signal output. During if there is colour mixture or color addition situation, voltage magnitude will occur the ANOMALOUS VARIATIONS time period, and this is due to different colours Light luminance signal superposition be converted into different voltage signals.
The method of work of above-mentioned light source output control system, light source output in above-described embodiment one and embodiment two Describe in detail in control method, the light source output control system of the application embodiment of the present invention, its work process also can be brought as embodiment One and embodiment two described in beneficial effect, all repeat no more herein.
Example IV
The embodiment of the present invention also proposes a kind of laser projection device, this laser projection device include LASER Light Source and on The light source output control system stated.
As shown in figure 14, be the laser projection device that the present embodiment proposes schematic diagram, this laser projection device includes swashing Radiant 1, ray machine 2, camera lens 3 and projection screen 4.
Wherein, using the LASER Light Source 1 of the double-colored wheel synchronous control system described in embodiment three, can the output of timing ground Three primary colours light, three primary colours light passes through optical wand(In figure is not shown)Enter ray machine 2 part, except optical wand structure, ray machine 2 part is also wrapped Include light path converting device and dmd chip(In figure is all not shown).Through the modulation of dmd chip, three primary colours light is again through multiple Refraction, convergence reach camera lens 3.
Projector equipment in the present embodiment four is ultrashort out-of-focus projection equipment, suitable family or portable use, therefore mirror 3 is ultrashort out-of-focus projection camera lens, and the feature of ultrashort out-of-focus projection camera lens is than under can still to project high-quality figure in low projection Picture.Light reaches camera lens 3 after DMD modulation, by one group of optical glass in camera lens, including multi-disc convex lenss, concavees lens, aspheric Face lens etc., are finally projected on projection screen 4 be formed projected image.
Wherein, as shown in figure 15, LASER Light Source 1 specifically includes laser instrument 11, the first colour wheel 15 and the second colour wheel 16;At this In inventive embodiments, laser instrument is blue laser, sends blue laser, and the excitation light source as fluorescence.Wherein, the first color Take turns as fluorescent material wheel, the second colour wheel is filter wheel.Filter wheel 16 generally includes the first primary colours colour filter subregion, the second primary colours colour filter divides Area and three primary colours colour filter subregion, in being embodied as, for laser part, because purity is higher, filter wheel can be correspondingly arranged Transparent region carries out transmission to laser, for fluorescence, because the purity relative laser of fluorescence is relatively low, needs by corresponding color Light filter carries out colour filter, enters once to improve the purity of color;Fluorescent material wheel 15 includes phosphor region and transmission area, and wherein transmission area leads to It is often clear glass, for the transmission laser when fluorescent wheel rotates to this position, phosphor region includes green and yellow fluorescent powder area (In figure is not shown), excite generation green fluorescence and yellow fluorescence for receiving blue laser irradiation.Wherein, green fluorescence area, Blue light transmission area, yellow fluorescence area is corresponding with the green color subregion on filter wheel, bright zone, red color filter subregion respectively. In embodiments of the present invention, fluorescent wheel 15 and filter wheel 16 are non-coaxial design, and from diagram, two colour wheels each rotate place Plane mutually perpendicular, but the present embodiment only gives a kind of non-coaxial concrete mode, does not limit and this.
In the present embodiment, fluorescent wheel 15 is reflective fluorescent wheel, and blue laser is through the transmissive region of fluorescent wheel 15 Afterwards, also can through being arranged at the relay lens group at the fluorescent wheel back side, the first eyeglass 12 as shown in Figure 11, the second eyeglass 13, 3rd eyeglass 14, these optical glasss include the optical glasss such as plane mirror, convex lenss or diffusion sheet, form blue laser and return Road is back to fluorescent wheel front, is incident to closing light eyeglass 17, carries out closing light with the fluorescence being excited.
After three primary colours light closing light, then pass sequentially through filter wheel 16, specifically, pass sequentially through corresponding color in filter wheel Position subregion, forms the three primary colours light output of timing, reaches and be located at LASER Light Source x ray machine part below, provide illumination.
Subregion except making two colour wheel corresponding color is consistent, and on such as fluorescent wheel 15, the center of circle angle in green fluorescence area is 108 degree, then on corresponding filter wheel, the center of circle angle setting of green color subregion is also 108 degree, also needs to two colour wheels same simultaneously Step rotation, keeps geo-stationary.
For realize fluorescent material wheel and filter wheel can synchronous rotary, the embodiment of the present invention takes above-described embodiment one, two to carry The method and system going out is realized:As shown in Figure 2, the first colour wheel 1 corresponds to the fluorescent material wheel 15 in Figure 15, and the second colour wheel 2 is corresponding Filter wheel 16 in Figure 15;First sync mark and the second sync mark are respectively provided with fluorescent material wheel and filter wheel, and two The individual position being marked on two colour wheels is identical.
First sensor is placed in around fluorescent material wheel, for detecting and obtaining the induced signal of the first sync mark, is red Outer sensor or optical sensor;Second sensor is placed in around filter wheel, for detecting and obtaining the second sync mark Induced signal, is infrared sensor or optical sensor;Wherein, the induced signal of the first sync mark and the second sync mark Induced signal is designated as first group of induced signal;The control unit of laser equipment compares the rising of first group of induced signal of synchronization Edge or trailing edge;And the difference of the rising edge according to first group of induced signal or trailing edge, adjustment fluorescent material wheel and filter wheel Rotating speed makes the rising edge of first group of induced signal or trailing edge overlaps complete just subsynchronous;3rd sensor is placed in going out of filter wheel Light side, is photosensitive sensors or luminance sensor, and for detecting and obtaining the second induced signal, this second induced signal is colour filter The luminance detection signal of wheel output light, is a voltage waveform signal, the different magnitude of voltage of different colours correspondence;Laser projection device Control unit obtain the second induced signal magnitude of voltage saltus step abnormal time section, adjustment fluorescent material wheel and filter wheel rotating speed Until magnitude of voltage saltus step abnormal time section eliminates as 0, complete the accurate Synchronization Control of fluorescent material wheel and filter wheel.
First sync mark and the preferred black belt of the second sync mark or black thin film or carbonization labelling, attach or spray Side surface in the drive motor driving fluorescent material wheel and filter wheel.
Above fluorescent material wheel and filter wheel, after synchronizing process twice realizes precisely synchronization, enable to by filter wheel The three primary colours light non-mixed color time period of output, thus improve monochromatic brightness and the purity of output, and then improve color Color saturation, simultaneously it is ensured that the timing of three primary colours such that it is able to for ray machine 2 part provide high-quality illumination light Source, improves color representation power and the display quality of projected image.
It should be noted that in embodiments of the present invention, LASER Light Source is with two kinds of fluorescent material of blue monochromatic laser excitation It is illustrated work process or the two-color laser light source of light source as a example the fluorescence producing two kinds of colors, wherein one Planting LASER Light Source excites one or two fluorescent material to be collectively forming three primary colours light.The output control process of its light source and above-mentioned reality Apply example be similar to, skilled addressee readily understands that and derive, will not be described here.
To sum up, the embodiment of the present invention propose laser projection device, non-coaxial be provided with the first colour wheel be fluorescent wheel and Second colour wheel is filter wheel, and on fluorescent wheel and filter wheel, corresponding position is respectively provided with the first synchronization as sync bit Labelling and the second sync mark, obtain sensing first in a swing circle respectively using first sensor and second sensor same The induced signal of step mark and the induced signal of sensing the second sync mark, compare in two induced signals the first sync mark and The rising edge of the second sync mark or trailing edge, obtain the rising edge of two induced signals or trailing edge in synchronization When position difference, adjustment drives the rotating speed of the drive motor of fluorescent wheel and filter wheel, realizes the elimination position of two induced signals Difference, is also achieved that non-coaxial first colour wheel and each self-corresponding first sync mark of the second colour wheel and the second sync mark First subsynchronous;Because the first sync mark and the second sync mark are initiateed with the reference of the first affiliated colour wheel and the second colour wheel Can there are some errors in assembling in position, after leading to timely two labellings to be synchronized, because rigging error does not make two The reference original position of colour wheel is perfectly aligned, thus there is tandem in time, will deposit from the light of filter wheel output In the colour mixture time period.Therefore pass through to arrange 3rd sensor in the output light path of filter wheel, get the second induced signal, the Two induced signals are voltage signal, the different colours light different voltages of correspondence, and the corresponding voltage magnitude of two kinds of color of light exists jumps Become, and the electric voltage exception existing during two kinds of color optical signal saltus steps corresponds to occur the time period of colour mixture between different colours, with mixed The change of color time period turns to reference, and the rotating speed again by two colour wheels of adjustment to eliminate the electric voltage exception that voltage jump exists, Achieve the accurate synchronous rotary of two colour wheels, finally eliminate the colour mixture period it is ensured that three primary colours output purity and sequential Property, ensure that monochromatic output brightness, beneficial to the color saturation improving laser projection image and display quality simultaneously.
Obviously, those skilled in the art can carry out the various changes and modification essence without deviating from the present invention to the present invention God and scope.So, if these modifications of the present invention and modification belong to the scope of the claims in the present invention and its equivalent technologies Within, then the present invention is also intended to comprise these changes and modification.

Claims (14)

1. a kind of light source output control method, described light source includes laser instrument, the first colour wheel and the second colour wheel, and described laser instrument is sent out Go out laser, irradiate described first colour wheel and produce fluorescence, described laser and fluorescence are respectively by corresponding on described second colour wheel Color subregion outgoing, described first colour wheel and the second colour wheel there is identical color subregion it is characterised in that
First sync mark, the second sync mark are respectively provided with described first colour wheel and the second colour wheel, wherein, described first is same Step mark and the second sync mark are alignd with the same position of described first colour wheel and the second colour wheel respectively;
Described output control method includes:
According to first group of induced signal of described first sync mark obtaining and the second sync mark, synchronous described first colour wheel With the second colour wheel;
Obtain the second induced signal from described second colour wheel output light path, and according to the second induced signal more subsynchronous described Color wheel and the second colour wheel, wherein, described second induced signal is the voltage waveform signal of corresponding different colours;
Export three primary colours through the second colour wheel timing.
2. light source output control method according to claim 1, described according to described first sync mark obtaining and the First group of induced signal of two sync marks, synchronous described first colour wheel and the second colour wheel specifically include:
In a swing circle, obtain the sensing letter of corresponding described first sync mark and described second sync mark respectively Number, it is designated as first group of inductive impulse signal;
The relatively rising edge of first group of inductive impulse signal of synchronization or trailing edge difference;
The rotating speed adjusting described first colour wheel and the second colour wheel makes rising edge or the trailing edge of described first group of inductive impulse signal Overlap with synchronous described first colour wheel and the second colour wheel.
3. light source output control method according to claim 1 and 2 is it is characterised in that described defeated from described second colour wheel Go out and in light path, obtain the second induced signal, and according to the second induced signal subsynchronous described first colour wheel and the second colour wheel tool again Body includes:
Obtain the second induced signal from described second colour wheel output light path,
Obtain the magnitude of voltage bound-time threshold value of described second induced signal,
Adjust the rotating speed of described first colour wheel and the second colour wheel until described magnitude of voltage bound-time threshold value is 0 with synchronization institute again State the first colour wheel and the second colour wheel.
4. light source output control method according to claim 1 it is characterised in that
Described first sync mark and the second sync mark turn positioned at the drive motor of described first colour wheel and the second colour wheel respectively Axle side surface.
5. the light source output control method according to claim 1 or 4 it is characterised in that
Described first sync mark is identical with described first colour wheel and the second colour wheel respectively with the second sync mark original position Color partition boundaries align.
6. light source output control method according to claim 3 is it is characterised in that adjust described first colour wheel and the second color The rotating speed of wheel, until described magnitude of voltage bound-time threshold value is 0, specifically includes:
Determine that the circumferential length between the first sync mark and the second sync mark is poor according to described magnitude of voltage bound-time threshold value;
On the basis of the first colour wheel or the second colour wheel, the rotating speed of adjustment the second colour wheel or the first colour wheel, so that described first is synchronous Circumferential length between labelling and the second sync mark is contracted to zero;
Adjust the second colour wheel or the first colour wheel at the uniform velocity to rotate with identical speed with the first colour wheel or the second colour wheel.
7. a kind of light source output control system, including laser instrument, the first colour wheel and the second colour wheel, described laser instrument sends laser, Irradiate described first colour wheel and produce fluorescence, described laser and fluorescence are respectively by corresponding color subregion on described second colour wheel Outgoing, described first colour wheel and the second colour wheel have identical color subregion it is characterised in that also including:
It is separately positioned on the second sync mark in the first sync mark and the second colour wheel on the first colour wheel, wherein, described One sync mark and the second sync mark are alignd with the same position of described first colour wheel and the second colour wheel respectively;
First sensor, and second sensor, are respectively used to detect and obtain described first sync mark, the second sync mark First group of induced signal;
Control unit, for according to described first group of induced signal synchronously described first colour wheel and the second colour wheel;
3rd sensor, for obtaining the second induced signal from described second colour wheel output light path, wherein, described second sensing Signal is the voltage waveform signal of corresponding different colours;
And, described control unit is additionally operable to according to the second induced signal subsynchronous described first colour wheel and the second colour wheel again.
8. light source output control system according to claim 7 is it is characterised in that described control unit also includes adjustment list Unit, described control unit specifically for,
The rising edge of first group of inductive impulse signal or trailing edge difference relatively described in synchronization;
Described adjustment unit adjusts described first colour wheel and the rotating speed of the second colour wheel makes the upper of described first group of inductive impulse signal Rise edge or trailing edge overlaps with synchronous described first colour wheel and the second colour wheel.
9. light source output control system according to claim 8 it is characterised in that described control unit also particularly useful for, Obtain the magnitude of voltage bound-time threshold value of described second induced signal,
Described adjustment unit is additionally operable to adjust the rotating speed of described first colour wheel and the second colour wheel up to described magnitude of voltage bound-time Threshold value is 0 with subsynchronous described first colour wheel and the second colour wheel again.
10. light source output control system according to claim 7 it is characterised in that
Described first sync mark and the second sync mark turn positioned at the drive motor of described first colour wheel and the second colour wheel respectively Axle side surface.
11. light source output control systems according to claim 7 or 10 it is characterised in that
Described first sync mark is identical with described first colour wheel and the second colour wheel respectively with the second sync mark original position Color partition boundaries align.
12. light source output control systems according to claim 7 are it is characterised in that described first sensor and second passes Sensor is infrared sensor or photosensitive sensors.
13. light source output control systems according to claim 7 are it is characterised in that described second sensor is light propagated sensation Sensor or luminance sensor.
A kind of 14. laser projection device, including LASER Light Source it is characterised in that described LASER Light Source is included as claim 7- Light source output control system described in 13 any one claim.
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US15/202,797 US9832433B2 (en) 2015-11-04 2016-07-06 Laser light source, method for controlling dual color wheels of light source, and laser projection device
US15/803,126 US10006610B2 (en) 2015-11-04 2017-11-03 Laser light source, method for controlling dual color wheels of light source, and laser projection device
US15/942,069 US10234108B2 (en) 2015-11-04 2018-03-30 Laser light source, method for controlling dual color wheels of light source, and laser projection device
US15/941,889 US10260709B2 (en) 2015-11-04 2018-03-30 Laser light source, method for controlling dual color wheels of light source, and laser projection device

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