CN105759547A - Double-color wheel synchronization control method and system for light source, and laser projection equipment - Google Patents
Double-color wheel synchronization control method and system for light source, and laser projection equipment Download PDFInfo
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- CN105759547A CN105759547A CN201610115888.2A CN201610115888A CN105759547A CN 105759547 A CN105759547 A CN 105759547A CN 201610115888 A CN201610115888 A CN 201610115888A CN 105759547 A CN105759547 A CN 105759547A
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS 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
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/20—Lamp housings
- G03B21/2006—Lamp housings characterised by the light source
- G03B21/2033—LED or laser light sources
- G03B21/204—LED or laser light sources using secondary light emission, e.g. luminescence or fluorescence
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS 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
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/20—Lamp housings
- G03B21/2053—Intensity control of illuminating light
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS 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
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/20—Lamp housings
- G03B21/206—Control of light source other than position or intensity
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Abstract
The invention discloses a double-color wheel synchronization control method for a light source, and the method comprises the steps: setting a first color wheel and a second color wheel in a non-coaxial manner; respectively setting a first mark and a second mark on the first and second color wheels; respectively obtaining a first inductive pulse signal and a second inductive pulse signal, which are respectively corresponding to the first mark and the second mark; carrying out the synchronization of the first and second inductive pulse signals, and achieving a purpose of synchronization of the first and second color wheels in an indirect manner. The invention also provides a double-color wheel control system corresponding to the method, and laser projection equipment employing the above system and method.
Description
This application claims the priority of the Chinese invention application 201510739594.2 that denomination of invention is " the double-colored of light source takes turns synchronisation control means, system and laser projection device " that on November 4th, 2015 submits.
Technical field
The present invention relates to LASER Light Source technical field, particularly relate to the double-colored of a kind of light source and take turns synchronisation control means, system and laser projection device.
Background technology
LASER Light Source, as a kind of solid state light emitter, has highlighted, and efficiently, the life-span is normal, and the series of advantages such as colour gamut is good, environmental protection become the selection of emerging projection light source.
The laser used in current industry and fluorescent material are excited in the light source of fluorescence composition that produces, it is common to use blue laser is as the LASER Light Source of laser projection system and excitation radiant.In a kind of implementation of prior art, blue laser is got to and green emitting phosphor and yellow fluorescent powder can be excited on fluorescent wheel to produce green light and sodium yellow respectively, then is filtrated to get red light (conversion efficiency directly being excited generation red fluorescence by red fluorescence powder is relatively low) from sodium yellow.In order to obtain three primary colours monochromatic light, filter wheel is set in the optical path, filter wheel is arranged in the output light path of fluorescent wheel, the green light that fluorescent wheel produces obtains green monochromatic light through green or the cyan filter of filter wheel, the sodium yellow that fluorescent wheel produces obtains red monochromatic light through the Red lightscreening plate of filter wheel, in addition, usual system can increase part sodium yellow to improve brightness, the sodium yellow that fluorescent wheel produces is directed through the bright zone of filter wheel and obtains yellow color light, blue laser is blue monochromatic light, do not need colour filter, the bright zone being directed through fluorescent wheel and filter wheel enters light path system.Blue laser obtains three primary colours and yellow color light by fluorescent wheel and filter wheel, therefore the synchronization of fluorescent wheel and filter wheel is to obtain the monochromatic key of three primary colours, for ensureing in a sequential section, by color output only a kind of after filter wheel, such as when fluorescent wheel exports green glow, filter wheel also rotates to green glow filter area, otherwise it is likely to result in the superposition of output different colours, color changes, and confusion also occurs three primary colours proportioning, it is impossible to form the three primary colours of normal timing output.
For ensureing the synchronicity of two-wheel in prior art, the mode of coaxial design is generally adopted to realize, as shown in Figure 1, fluorescent material wheel 11 and filter wheel 12 adopt coaxially connected, the two place plane is parallel to each other, it is placed on the light emitting path of LASER Light Source 13, and ensure in double-colored wheel, the color subregion of fluorescent material wheel (includes phosphor region and transmission area, wherein the color of transmission area can be considered the color of the laser through this transmission area) corresponding with the distribution of the trichroism color filter regions of filter wheel, adopt same motor 14 to drive according to certain frequency to rotate, it is achieved the double-colored synchronous rotary taken turns.
In above-mentioned method for designing, need the boundary line by the same color subregion in fluorescent material wheel and filter wheel accurately corresponding, namely the projection that on two-wheeled, color subregion boundary line is axially gone up should be overlap, and this Standard technology difficulty is high, once machine, two-wheeled all fixes with rotating shaft, therefore the offset error that processing and installation cause is by immutable, and there is drift in various degree in each colour wheel, all can cause therefore double-colored take turns in there is the overlap of certain angle between two kinds of different colours, form secondary colour, and the secondary colour produced by factors such as rigging error and colour wheel drifts to eliminate two kinds of color of light intersections to exist, typically require and reject the secondary colour that between two colors, certain angle is overlapping, but so can reduce each monochromatic brightness.
Needs proposition one is double-colored takes turns synchronisation control means, under the non-coaxial premise of two-wheeled, it is also possible to ensure the concordance synchronized.
Summary of the invention
It is an object of the invention to provide the double-colored of a kind of light source and take turns synchronisation control means, system and laser projection device, solve the non-coaxial double-colored synchronous control technique problem taken turns.
It is an object of the invention to be achieved through the following technical solutions:
On the one hand, it is proposed to the double-colored of a kind of light source takes turns synchronisation control means, it is applied to non-coaxial first colour wheel and the second colour wheel, on position corresponding with the second colour wheel on the first colour wheel, the first labelling is set respectively, the second labelling；
Synchronisation control means includes:
Obtaining corresponding first labelling and the first inductive impulse signal of the second labelling, the second inductive impulse signal respectively, inductive impulse signal is cyclic pulse signal；
Synchronize the first inductive impulse signal and the second inductive impulse signal；
It is preferred that after synchronizing the first inductive impulse signal and the second inductive impulse signal, also include:
Obtaining the beam brightness signal by the second colour wheel output, wherein, the second colour wheel is arranged in the first colour wheel output light path；
First colour wheel and the second colour wheel are carried out second synchronization by the saltus step according to beam brightness signal；
It is preferred that synchronization the first inductive impulse signal and the second inductive impulse signal specifically include:
In a swing circle, compare rising edge or the trailing edge difference of synchronization the first inductive impulse signal and the second inductive impulse signal,
Adjust the first colour wheel or the rotating speed of the second colour wheel, make the rising edge of the first inductive impulse signal and the second inductive impulse signal or trailing edge overlap；
Specifically include it is preferred that the first colour wheel and the second colour wheel are carried out second synchronization according to the saltus step of beam brightness signal:
Obtain the brightness flop bound-time threshold value in beam brightness signal,
Adjusting the first colour wheel or the rotating speed of the second colour wheel, making brightness flop bound-time threshold value is 0；
It is preferred that adjust the rotating speed of the first colour wheel or the second colour wheel, making brightness flop bound-time threshold value is 0 specifically include:
Rotating speed and brightness flop bound-time threshold value according to the first colour wheel or the second colour wheel determine that the circumferential length between two colour wheels is poor,
With one of them rotating speed of the first colour wheel and the second colour wheel for benchmark, and poor according to circumferential length, change wherein another rotating speed, until brightness flop bound-time threshold value becomes 0；
It is preferred that adjust the rotating speed of the first colour wheel or the second colour wheel, making brightness flop bound-time threshold value is also include after 0:
The rotating speed adjusting the first colour wheel or the second colour wheel makes the two synchronized rotations of colour wheel.
On the one hand, it is proposed to the double-colored of a kind of light source takes turns synchronous control system, including: include non-coaxial first colour wheel and the second colour wheel, be separately positioned on the first labelling on the first colour wheel and position corresponding to the second colour wheel and the second labelling；
First sensor, for obtaining the first inductive impulse signal of the first labelling,
Second sensor, for obtaining the second inductive impulse signal of the second labelling,
Synchronous control unit, is used for synchronizing the first inductive impulse signal and the second inductive impulse signal；
It is preferred that also include the 3rd sensor, for obtaining the beam brightness signal by the second colour wheel output, wherein, wherein, the second colour wheel is arranged in the first colour wheel output light path；
And, the first colour wheel and the second colour wheel are carried out second synchronization by the saltus step that synchronous control unit is additionally operable to according to beam brightness signal.
It is preferred that synchronous control unit also includes comparison module, in a swing circle, compare rising edge or the trailing edge difference of synchronization the first inductive impulse signal and the second inductive impulse signal；
And, synchronous control unit also includes adjusting module, for adjusting the first colour wheel or the rotating speed of the second colour wheel.
It is preferred that the first colour wheel is fluorescent wheel, the second colour wheel is filter wheel.
And, it is proposed to a kind of laser projection device, take turns synchronous control system including LASER Light Source and the double-colored of above-mentioned light source.
Embodiment of the present invention technical scheme, its technique effect having or advantage be:
The double-colored of light source that the embodiment of the present invention proposes takes turns synchronisation control means and system, the first labelling and the second labelling it is provided with respectively on the position that the first colour wheel and the second colour wheel are corresponding, first labelling and the second labelling are followed colour wheel and are rotated, by obtaining this first labelling and inductive impulse signal corresponding to the second labelling, this inductive impulse signal is cyclic pulse signal, Tong Bu with the swing circle of colour wheel, above-mentioned first labelling and the second labelling are the sync mark of two colour wheels.Therefore, by synchronizing described first inductive impulse signal and the second inductive impulse signal, reach the purpose indirectly the first colour wheel and the second colour wheel synchronized.
nullSynchronization for two colour wheels，Synchronized except to ensure，The more important thing is that the color subregion on each colour wheel of synchronization is mutually corresponding，Namely，Any time，The color of two colour wheel outputs has corresponding relation，Otherwise，The colour mixture time period is there will be when any two colors switch，Therefore，Embodiment of the present invention scheme is also further by obtaining the beam brightness signal of the second colour wheel output，This beam brightness signal can include the luminance signal of multiple primary colours，The luminance signal of a kind of primary colours can also be included，By judging the saltus step of beam brightness signal，Two colour wheels are carried out second synchronization，Specifically，If beam brightness signal has the saltus step of certain time threshold value，Then illustrate there is the colour mixture time period，Then on first time synchronous foundation，The rotating speed of two colour wheels is adjusted，Making bound-time threshold value is 0，Thus reaching the accurate synchronization of two colour wheels，Also timing and the purity of the output of light source primary colours are further ensured.
The invention allows for a kind of based on the above-mentioned double-colored laser projection device taking turns synchronous control system, including LASER Light Source, LASER Light Source includes fluorescent wheel and filter wheel, apply the double-colored of any of the above-described technical scheme and take turns synchronisation control means or system, and above-mentioned technique effect can be reached, thus improving the quality of projection picture, do not repeat them here.
Accompanying drawing explanation
Fig. 1 adopts the double-colored structural representation taking turns coaxial design in prior art；
Fig. 2 A is that the double-colored of light source that the embodiment of the present invention one proposes takes turns synchronisation control means flow chart；
Fig. 2 B is that the double-colored of light source again that the embodiment of the present invention one proposes takes turns synchronisation control means flow chart；
Fig. 3 is the non-coaxial double-colored structural representation taken turns that the embodiment of the present invention two proposes；
Fig. 4 is a kind of colour wheel corresponding relation schematic diagram with labelling of the embodiment of the present invention two proposition；
Fig. 5 is another colour wheel corresponding relation schematic diagram with labelling of the embodiment of the present invention two proposition；
Fig. 6 is that in the embodiment of the present invention two, inductive impulse signal synchronizes front schematic diagram；
Fig. 7 is inductive impulse signal just subsynchronous rear schematic diagram in the embodiment of the present invention two；
Fig. 8 is labelling rigging error schematic diagram in the embodiment of the present invention two；
The double-colored pulse signal taken turns that Fig. 9 is the rigging error shown in corresponding diagram 8 compares schematic diagram；
Figure 10 is the embodiment of the present invention two brightness flop voltage waveform signal schematic diagram；
Figure 11 is that the double-colored of light source that the embodiment of the present invention three proposes takes turns synchronous control system frame diagram；
Figure 12 is the schematic diagram of the laser projection device that the embodiment of the present invention four proposes；
Figure 13 is the double-colored wheel construction schematic diagram of LASER Light Source in the embodiment of the present invention four.
Detailed description of the invention
In order to make the object, technical solutions and advantages of the present invention clearly, below in conjunction with accompanying drawing, the present invention is described in further detail, it is clear that described embodiment is only a part of embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, all other embodiments that those of ordinary skill in the art obtain under not making creative work premise, broadly fall into the scope of protection of the invention.
Below in conjunction with accompanying drawing, the technical scheme that the embodiment of the present invention is provided is described in detail.
Embodiment one
Embodiments provide the double-colored of a kind of light source and take turns synchronisation control means, be applied to the double-colored of non-coaxial design and take turns Synchronization Control, as shown in Figure 2 A, including:
S20: obtaining corresponding first labelling and the first inductive impulse signal of described second labelling, the second inductive impulse signal respectively, inductive impulse signal is cyclic pulse signal；
Wherein, first labelling and the second labelling are separately positioned on the first colour wheel and position corresponding to the second colour wheel, first labelling and the second labelling are followed colour wheel and are rotated, obtain this first labelling and inductive impulse signal corresponding to the second labelling, this inductive impulse signal is cyclic pulse signal, Tong Bu with the swing circle of colour wheel, above-mentioned first labelling and the second labelling are the sync mark of two colour wheels.
S21: synchronize described first inductive impulse signal and the second inductive impulse signal.
Specifically, in a swing circle, compare rising edge or the trailing edge difference of synchronization the first inductive impulse signal and the second inductive impulse signal,
Adjust the first colour wheel or the rotating speed of the second colour wheel, make the rising edge of the first inductive impulse signal and the second inductive impulse signal or trailing edge overlap.
Aforementioned it has been noted that the first labelling and second is labeled as the reference sync mark of two colour wheels, by synchronizing the first inductive impulse signal and the second inductive impulse signal, reach the purpose indirectly the first colour wheel and the second colour wheel synchronized.
For the synchronization of two colour wheels, synchronized except to ensure, it is often more important that the color subregion on each colour wheel of synchronization is mutually corresponding, it is, any time, the color of two colour wheel outputs has corresponding relation, otherwise, there will be the colour mixture time period when any two colors switch.It is manual assembly that this colour mixture time period Producing reason is often as sync mark, and there is rigging error unavoidably, and the first labelling or the second labelling do not paste default position, but there is skew, and therefore, embodiment of the present invention scheme, as shown in Figure 2 B, may further comprise:
S22: obtaining the beam brightness signal by the second colour wheel output, wherein, the second colour wheel is arranged in the first colour wheel output light path；
And,
S23: described first colour wheel and the second colour wheel are carried out second synchronization according to the saltus step of beam brightness signal.
By obtaining the beam brightness signal of the second colour wheel output, this beam brightness signal can include the luminance signal of multiple primary colours, the luminance signal of a kind of primary colours can also be included, by judging the saltus step of beam brightness signal, two colour wheels are carried out second synchronization, specifically, if beam brightness signal has the saltus step of certain time threshold value, then illustrate there is the colour mixture time period, then on first time synchronous foundation, the rotating speed of two colour wheels is adjusted, making bound-time threshold value is 0, thus reaching the accurate synchronization of two colour wheels, also timing and the purity of the output of light source primary colours are further ensured.
Wherein, according to the saltus step of beam brightness signal, the first colour wheel and the second colour wheel are carried out second synchronization, specifically include:
Obtain the brightness flop bound-time threshold value in beam brightness signal,
Adjusting the first colour wheel or the rotating speed of the second colour wheel, making brightness flop bound-time threshold value is 0.Now complete the accurate synchronization of two colour wheels.
And, the rotating speed of above-mentioned adjustment the first colour wheel or the second colour wheel, making brightness flop bound-time threshold value is 0 specifically include:
Rotating speed and brightness flop bound-time threshold value according to the first colour wheel or the second colour wheel determine that the circumferential length between two colour wheels is poor,
With one of them rotating speed of the first colour wheel and the second colour wheel for benchmark, and poor according to circumferential length, change wherein another rotating speed, until brightness flop bound-time threshold value becomes 0.
And, at the rotating speed adjusting the first colour wheel or the second colour wheel, making brightness flop bound-time threshold value is also include after 0:
The rotating speed adjusting the first colour wheel or the second colour wheel makes the two synchronized rotations of colour wheel.
The double-colored of the embodiment of the present invention one offer takes turns synchronisation control means, and the first sync mark according to two colour wheels obtains the periodic inductive impulse signal that sync mark is corresponding, reaches the purpose of indirect synchronization colour wheel by synchronizing the inductive impulse signal of two sync marks.
If but there is deviation in sync mark, then first hyposynchronous result is it is possible to cause in the light beam of the second colour wheel output doped with the colour mixture time period, change again through luminance signal saltus step output, light beam after the second colour wheel, two colour wheels carry out second time synchronize, making light source output non-mixed color section, namely two colour wheels reach Complete Synchronization.
Technique scheme achieves the double-colored concordance taking turns synchronization, thus also ensure that purity and timing that light source final color exports.
Embodiment two
The embodiment of the present invention two is on embodiment one basis, in conjunction with the detailed description that accompanying drawing carries out.
Specifically, the embodiment of the present invention three provides the double-colored of a kind of light source and takes turns synchronisation control means, it is applied in the double-colored LASER Light Source taking turns non-coaxial design, the non-coaxial double-colored positional structure exemplary relationship taken turns can be as shown in Figure 2, first colour wheel 1 and the second colour wheel 2, it is connected to driving motor shaft 12 and 22 to drive wheel face to do periodic rotational movements, as shown in Figure 3, the elongated central line driving motor shaft 12 and 22 intersects at an angle, it can be acute angle, right angle or obtuse angle, in this example perpendicular relation.That is, the rotating shaft of the first colour wheel 1 and the second colour wheel 2 is non-coaxial, accordingly, two colour wheel wheel face place planes neither space parallel relation, but intersect at an angle.In the example depicted in fig. 3, a kind of position only giving the first colour wheel and the second colour wheel rotating shaft arranges relation, does not limit and this.
Wherein, first colour wheel can be fluorescent wheel, fluorescent wheel has green emitting phosphor district, blue laser transmission area, yellow fluorescent powder district is (owing to red fluorescence powder launching efficiency is low, therefore substitute with yellow fluorescent powder, but obtain the effect of HONGGUANG still referred to as red subregion according to its final filtration), second colour wheel can be filter wheel, filter wheel has green color district, blue laser transmission area, red color filter district respectively with the green emitting phosphor district on fluorescent wheel, blue laser transmission area, yellow fluorescent powder district has identical angle and order distribution.Wherein red color filter district is corresponding with yellow fluorescent powder district, for being filtrated to get red fluorescence from yellow fluorescence, thus being sequentially output red, green, blue three primary colours from filter wheel.
Specifically, the first colour wheel 1 is provided with the first labelling 11, the second colour wheel 2 is provided with the second labelling 21, specifically, be the driving motor-side surface laying respectively at the first colour wheel and the second colour wheel.Further, the first labelling 11 is corresponding with second labelling 21 position on each affiliated colour wheel.Owing to having corresponding color subregion on the first colour wheel and the second colour wheel; would generally using color subregion as reference; by the first labelling 11 and the second labelling 12, the position color subregion a certain with on affiliated colour wheel that arrange on driving motor shaft 12 and 22 carries out corresponding, consequently facilitating comparison two marks whether that position corresponds to each other.In one is embodied as, first labelling 11 aligns with the border of same color subregion on affiliated colour wheel in the original position driving motor shaft 22 side surface respectively in the original position and the second labelling 21 driving motor shaft 12 side surface, ratio is as shown in Figure 4, the original position setting labelling aligns with the boundary of a certain color on colour wheel, the boundary of this color is the reference original position for labelling on colour wheel, specifically, the border of the original position of the first labelling 11 and the first colour wheel 1 Green subregion aligns, the border of the green partition in the original position of the second labelling 21 and the second colour wheel 2 aligns, owing in colour wheel, color is that subregion is connected with each other, therefore in this example, border refers to the demarcation line of two kinds of colors, can be regarded as the boundary position of green partition and next color.Skilled addressee readily understands that and derive, the first labelling and the second labelling can also be positioned at the position, boundary of other any two colors, as long as any two colors on two colour wheels are same case.
Certainly, in another specific embodiment, can also be, all with same color boundaries apart from identical displacement, as it is shown in figure 5, two labellings are the deviation of φ angle with the border of green partition on two colour wheels respectively, also it is a kind of there is the situation that the position being marked on two colour wheels is corresponding, now, RADIAL colour wheel deviateing green partition border φ angle is the colour wheel reference original position for labelling.
In aforementioned prior art also it have been mentioned that, first colour wheel and the second colour wheel need each color subregion to correspond to each other when rotated, when the first colour wheel rotates to green partition, second colour wheel also to rotate to green partition (actual functional capability is that green is carried out colour filter), guarantee is green through the color of the light of the second colour wheel outgoing, the overlap and the sequential that are otherwise likely to occur color are chaotic, it is impossible to normally form three primary colours output.
Further in conjunction with Fig. 2 B, the synchronisation control means of non-coaxial first colour wheel 1 and the second colour wheel 2 in LASER Light Source will be described below.
Step S20: obtaining corresponding first labelling and the first inductive impulse signal of described second labelling, the second inductive impulse signal respectively, this inductive impulse signal is cyclic pulse signal；
In embodiment of the method, it is labeled as black thin film or black belt or carbonization labelling, black has extinction effect, therefore the signal that sensor sends is in the process driving motor shaft to rotate, it is predominantly absorbed when running into the density bullet of above-mentioned rotating shaft side surface, the signaling reflex that sensor sends then is returned thus being detected by a sensor by the unmarked part in motor shaft side, therefore, when using sensors to detection the first colour wheel and the second colour wheel rotation status, the situation that the optical signal sent by sensor is absorbed and reflects can sense the existence of the first labelling and the second labelling and form the pulse signal that low and high level is formed, thus in a swing circle, get the induced signal of corresponding first labelling respectively, and the induced signal of corresponding second labelling, the two induced signal is used as first group of induced signal.
Here swing circle, refers to the time that two colour wheels each rotate a circle.During system initial start, two colour wheels at the uniform velocity rotate after accelerating to identical rotating speed in the same direction simultaneously so that the first labelling and the second labelling geo-stationary, then in a swing circle, obtain first group of induced signal of corresponding first labelling and the second labelling respectively.
Step S21: synchronize described first inductive impulse signal and the second inductive impulse signal.
In the induced signal of corresponding first labelling, include the rectangular pulse possessing rising edge and trailing edge embodying the first labelling, in the induced signal of corresponding second labelling, include the rectangular pulse possessing rising edge and trailing edge embodying the second labelling.
In a swing circle, if the first colour wheel and the second colour wheel also unrealized synchronous rotary, then the first labelling and second is marked at the rising edge of synchronization or trailing edge has position difference.Or, show as the first labelling and the second labelling have time difference through same position.
As shown in Figure 6, first colour wheel and the second colour wheel rotate a circle, rectangular pulse that first labelling is corresponding and rectangular pulse corresponding to the second labelling, on synchronization, the position of pulse has difference, or the beginning and ending time of pulse has time difference on same position, show as at its rising edge of synchronization or trailing edge misaligned.
Rising edge according to first group of induced signal or trailing edge difference, adjust the first colour wheel and the rotating speed of the second colour wheel, makes the rising edge of the first induced signal or trailing edge overlap, completes just subsynchronous.
Specifically, as shown in Figure 6, the inductive waveform corresponding according to the first labelling in first group of induced signal and inductive waveform corresponding to the second labelling, the time difference between two labellings of two colour wheels can be obtained, the circumferential length difference S between two labellings can be calculated in two colour wheels according to time difference, wherein, S=2 π nRt, n is rotating speed, and R is the radius being tagged to colour wheel center, and t is the time；Two colour wheels are synchronized when at the uniform velocity rotating, it it is geo-stationary between two-wheeled, the rotating speed that then can keep one of them colour wheel is constant, and adjust the rotating speed of another colour wheel, shorten the circumferential length difference S between two labellings, namely shorten the time difference between two labellings, the adjustment time can be calculated by the computing formula of rotating speed Yu circumferential length, by controlling the adjustment time, circumferential length difference S is shortened to zero, then the time difference between two labellings is also zero, then adjust that the rotating speed of two colour wheels is identical at the uniform velocity to be rotated again, thus realizing the synchronization of two colour wheels.At this, only give a kind of method adjusting colour wheel rotating speed, it is also possible to the rotating speed keeping a colour wheel is constant, reduce the rotating speed of another colour wheel, calculate the adjustment time that circumferential length difference is foreshortened to 0, again two-wheeled is driven according to same rotating speed after adjustment.
It should be noted that, in this method embodiment, first labelling and the second labelling Main Function are as the sync bit labelling set, the rotating speed of motor shaft and colour wheel can also be calculated according to the number of pulse signal in a swing circle of colour wheel simultaneously, play the effect of detection colour wheel rotating speed.It is thus possible to obtain the rotating speed of colour wheel in real time, change the rotating speed of colour wheel by adjusting the power etc. of drive circuit.
Synchronization Control through above-mentioned steps, for the same position on two given colour wheels, the pulse signal being marked at synchronization of the first colour wheel shown in Fig. 6 and the second colour wheel is had the situation of position difference, the induced signal rising edge being adjusted to two colour wheel labellings shown in Fig. 7 overlaps, and namely two labellings realize synchronizing.The position identical with the first colour wheel and the second colour wheel respectively due to the first and second labellings is corresponding, and two colour wheels are also achieved that basic synchronization.Two colour wheels have corresponding color subregion, and the order of color subregion fixes, when colour wheel realizes basic synchronization, the same color subregion of two colour wheels is also corresponding all the time in rotary course, achieve matching relationship, when such as the first colour wheel rotates to green partition, then the second colour wheel also rotates just to green partition, it is achieved thereby that the output of green glow.The double-colored basic goal taking turns synchronization is also make light pass sequentially through same color subregion on two colour wheels within the same time period, thus ensureing eventually through the timing of each color in the three primary colours of the second colour wheel output.
nullBut due to rigging error reason，The first labelling and the second labelling as the sync bit set are likely to and the reference original position on corresponding colour wheel，The alignment that in the border of such as Fig. 4 Green subregion or Fig. 5, the position of deviation green partition border φ angle can not be absolute，Would be likely to occur the deviation of millimeter or more subsection rank，As shown in Figure 8，Being marked at theoretic setting reference position is at green partition border GL line，But would be likely to occur during practical set and deviate the deviation that former reference position GL is φ 1 angle，Namely the labelling after assembling does not overlap with theory setting position completely，So two colour wheels same color original position is also just and unrealized absolute synchronization，Then will still by color subregions different in two colour wheels when rotating past in this deviation time section through the light of two colour wheel outgoing，Although this overlapping region is only small，But still can form the mixed light of different colours.This deviation does not affect only a kind of color generation colour mixture simultaneously, owing to each color subregion is fixed and corresponds to each other, the dislocation in other words of this overlap can be extended in two kinds of colors below, cause that colour mixture also occurs other two kinds of colors, therefore once there be error, for three primary colours, within a cycle, have the colour mixture phase of 3 periods.
For eliminating the mixed color phenomenon that this error is brought, it is achieved precisely synchronize, also need to perform step S22: obtaining the beam brightness signal by the second colour wheel output, wherein, the second colour wheel is arranged in the first colour wheel output light path；And,
S23: described first colour wheel and the second colour wheel are carried out second synchronization according to the saltus step of beam brightness signal.
After realization is just subsynchronous, due to two induced signals corresponding first labellings and second labelling respectively of first group of induced signal, the rising edge of two induced signals overlaps, and represents that the first labelling and the second labelling are synchronized.But owing to there is rigging error as shown in Figure 8, when arranging labelling, first labelling is from can not be perfectly aligned with the second colour wheel reference original position with reference to original position and the second labelling with the first colour wheel, although the pulse signal then resulting in the sync bit labelling set is synchronized, but the reference original position of two colour wheels is not completely superposed at synchronization.
As shown in Figure 7, the error of t1 time variable is there is in first labelling rising edge signal distance the first colour wheel with reference to original position, the error of t2 time variable is there is in second labelling rising edge signal distance the second colour wheel with reference to original position, wherein, t1, t2 are all higher than being equal to 0, if the distance of first marking path the first colour wheel reference original position is zero, i.e. alignment just, then t1=0.Assume t2 > t1, in first group of induced signal after so first subsynchronous, still the error of t2-t1 time variable is there is between first colour wheel and the second colour wheel, Figure 10 is the another kind of form of expression of Fig. 8, it is with the reference original position of two-wheeled for benchmark, it is assumed that must at synchronization through this position in rotary course double-colored wheel, then due to labelling and the rigging error skew existed with reference to original position, will result in not lining up of the pulse signal of small two labelling, there is t2-t1 time residual quantity.Although the error produced by labelling assembling is in the range of error allowed, but the superposition of color can be caused, form colour mixture color section, therefore consider from the practical situation of the actual output of color, the reference original position making the first colour wheel and the second colour wheel to be in alignment with each other at synchronization adjusting,, it is achieved the further synchronization of the first colour wheel and the second colour wheel.
Brightness flop signal waveforms as shown in Figure 10, this error in brightness flop signal with voltage differences change Novel presentation out, this brightness flop signal is a voltage waveform signal, can obtain from the output light light path of the second colour wheel, owing to different colors has different brightness, different brightness can be converted to different magnitudes of voltage by sensor, thus the different colours in different magnitude of voltage correspondence three primary colours, owing to the voltage magnitude of the output of random color determines that, then between any two kinds of colors, voltage magnitude is saltus step, and secondary colour shows as change in voltage unusual part between two kinds of colors.
According to waveform as shown in Figure 10, it is possible to determining the time variable t2-t1 of two kinds of color voltage magnitude saltus step unusual parts, this saltus step unusual part is magnitude of voltage bound-time threshold value, when this time threshold is 0, two colour wheels realize accurate synchronous rotary.
By adjusting the first colour wheel or the rotating speed of the second colour wheel, until magnitude of voltage bound-time threshold value is 0.
nullMethod of adjustment to the first colour wheel and the second colour wheel in the similar first synchronizing process of concrete method of adjustment，Namely the time residual quantity t2-t1 shown in Figure 10 is obtained，And the rotating speed of current colour wheel is known by measurement markers pulse number，Learn according to aforesaid computing formula，Reach two colour wheels and need the circumferential length S of process with reference to original position alignment，Afterwards，With the first colour wheel for benchmark，Adjust the rotating speed of the second colour wheel，Or，With the second colour wheel for benchmark，Adjust the rotating speed of the first colour wheel，Circumferential length difference between two colour wheels or after time difference is contracted to 0，Adjust two synchronized rotations of colour wheel，Making magnitude of voltage bound-time threshold value is 0，It is achieved thereby that the double-colored precise synchronization taken turns rotates，Eliminate two kinds of color voltage magnitude saltus step unusual parts，Thus eliminate two colour wheel labellings because of rigging error cause asynchronous.
Compare and existing coaxially double-colored take turns synchronisation control means, the double-colored synchronisation control means taken turns of the non-coaxial setting that the embodiment of the present invention provides, can according to the sync bit labelling set, namely the induced signal being positioned at the second labelling of the first labelling of the first colour wheel and the second colour wheel corresponding carries out first Synchronization Control, rigging error for labelling also is able to be eliminated by the elimination colour mixture time period, thus to be different from prior art coaxially double-colored takes turns that medium speed is identical all the time and situation that error exists all the time, the motility of synchronisation control means provided by the invention is strong, the double-colored synchronization taken turns can be realized accurately.
And, due to without double-colored taking turns the secondary colour rejecting between two kinds of colors in scheme as coaxially connected, only picking out the pure color monochromatic period utilizes, light in the whole cycle can all be utilized by embodiment of the present invention scheme, monochromatic brightness is exported it is thus possible to improve, also improve the purity of the color of colour wheel output and the color saturation of system output image.
Simultaneously relative to the mode manually adjusted, the synchronisation control means of the embodiment of the present invention not only saves cost of labor, and the color matching error because Color-sensitive degree difference is caused by different people in manual adjustment mode can be eliminated, substantially increase the double-colored precision taking turns color matching.
And, when the reference original position on colour wheel is positioned at color boundaries, the original position of the first labelling and the second labelling also respectively with corresponding belonging to the same color boundaries of colour wheel align, thus the induced signal obtained according to sensor, it is possible not only to weigh the degree of the synchronization of two labellings, the rising edge (when effective impulse is high level pulse) of its pulse or trailing edge (when effective impulse is low level pulse) also represent the initial time of the color of this reference original position, can by judging that the startup color of system is known in the arriving of pulse signal, owing to each color subregion and order are fixed on colour wheel, thus the color sequential of system can also be known.Such as, green partition border when the first colour wheel, be such as the border adjacent with red subregion as reference original position time, the original position of the first labelling corresponds to green partition border, accordingly, the original position of the second labelling aligns corresponding to the green partition border of the second colour wheel, when sensor detects the pulse induction signal of the first labelling and the second labelling, known, the rising edge of induced signal pulse or trailing edge represent the beginning of green color, and the order of three primary colours is such output green, blue, red order.When practical application, can set-up mode by labelling and color boundaries are aligned, the wheel speed that reaches simultaneously to be checked colors by induced indicia is measured, and synchronizes to compare, and judges color initial time and multiple action sequentially.
It should be noted that, the synchronisation control means of above-mentioned colour wheel synchronisation control means two colour wheels by way of example only, when needs highlight illumination, when using multiple sets of light sources, using multiple colour wheel or the double-colored wheel construction of many groups, the colour wheel synchronisation control means that the embodiment of the present invention provides is equally applicable.
Embodiment three
The embodiment of the present invention also proposes the double-colored of a kind of light source and takes turns synchronous control system, and as shown in figure 11, including the first colour wheel 21, the first colour wheel 21 includes the first labelling (not shown)；Second colour wheel 22, second colour wheel 22 includes the second labelling (not shown), wherein the first labelling with second be marked at corresponding belonging to position on colour wheel corresponding, this system also includes first sensor the 23, second sensor the 24, the 3rd sensor 25 and synchronous control unit 26.
Wherein, first sensor 23, for obtaining the first inductive impulse signal of the first labelling of the first colour wheel, for infrared sensor or optical sensor；Second sensor 24, for obtaining the second inductive impulse signal of the second labelling of the second colour wheel, for infrared sensor or optical sensor.
Synchronous control unit 26, is used for synchronizing the first inductive impulse signal and the second inductive impulse signal.
And, the 3rd sensor 25, for obtaining the beam brightness signal by the second colour wheel output, this brightness flop signal is a voltage waveform signal by AD conversion, the magnitude of voltage that different colours is corresponding different；Specifically, the 3rd sensor 25 is photosensitive sensors or luminance sensor, is placed in the output light path of the second colour wheel 22；In being embodied as one, the first colour wheel 21 is fluorescent wheel, and the second colour wheel 22 is filter wheel, and the 3rd sensor 25 is placed in the output light path of filter wheel, obtains the optical signal of the output primary lights after filter wheel colour filter.
And, the first colour wheel and the second colour wheel are carried out second synchronization by the saltus step that synchronous control unit 26 is additionally operable to according to beam brightness signal.
Specifically, synchronous control unit 26 also includes comparison module 260, is used for, and in a swing circle, compares rising edge or the trailing edge difference of synchronization the first inductive impulse signal and the second inductive impulse signal；
And, synchronous control unit 26 also includes adjusting module 261, for adjusting the first colour wheel or the rotating speed of the second colour wheel.On the one hand, by adjusting the first colour wheel or the rotating speed of the second colour wheel, it is possible to make the rising edge of the first inductive impulse signal and the second inductive impulse signal or trailing edge overlap, so that two sensing pulse signals synchronize.On the other hand, when two colour wheels being carried out second time and synchronizing, by adjusting the first colour wheel or the rotating speed of the second colour wheel, make in the brightness flop signal that the 3rd sensor 25 obtains, brightness bound-time threshold value is 0, thus reaching the double-colored accurate synchronization taken turns.
Specifically, refer again to the double-colored positional structure schematic diagram taken turns in Fig. 3, the first labelling that wherein first colour wheel the 1, second colour wheel 2 in Fig. 3 is respectively equivalent to the first colour wheel 21 in the embodiment of the present invention and the first labelling 11 in the second colour wheel 22, Fig. 2 and the second labelling 21 is equivalent in the embodiment of the present invention and the second labelling.
First labelling and second is labeled as sync bit labelling set in advance, it is separately positioned on the driving motor-side surface of the first colour wheel 21 and the second colour wheel 22, labelling can be black belt or black thin film or carbonization labelling, utilize the principle of black light-absorbing, the situation that the light sent by sensor is absorbed and reflects knows the first labelling and the rotational case of the second labelling, reflects the first colour wheel and the rotational case of the second colour wheel.In position, the first labelling and the second labelling all align with reference to original position with on each affiliated colour wheel, it is possible to the situation as shown in Fig. 4 or Fig. 5, do not repeat them here.
In a particular embodiment, 3rd sensor 25 is photosensitive sensors, luminance signal can be converted to voltage signal, this voltage signal is brightness flop signal, can will be embodied intuitively in the form of a voltage by the situation of the output light after the second colour wheel, different colors has different brightness, thus the waveshape signal of the different voltage magnitude of brightness flop signal output.If there is colour mixture or color addition situation, will there is the ANOMALOUS VARIATIONS time period in voltage magnitude, and this is that the luminance signal superposition of the light due to different colours converts different voltage signals to.
The above-mentioned double-colored method of work taking turns synchronous control system, in above-described embodiment one and embodiment two, double-colored the wheel in synchronisation control means of light source is described in detail, application the double-colored of the embodiment of the present invention takes turns synchronous control system, its work process also can bring the beneficial effect as described in embodiment one or embodiment two, all repeats no more herein.
Embodiment four
The embodiment of the present invention also proposes a kind of laser projection device, and this laser projection device includes LASER Light Source, and what this LASER Light Source included described in above-described embodiment double-colored takes turns synchronous control system.
As shown in figure 12, for the schematic diagram of the laser projection device that the present embodiment proposes, this laser projection device includes LASER Light Source 1, ray machine 2, camera lens 3 and projection screen 4.
Wherein, what LASER Light Source 1 adopted described in embodiment three double-colored takes turns synchronous control system, three primary colours light can be exported in timing ground, three primary colours light enters ray machine 2 part by optical wand (not shown), except light bar structure, ray machine 2 part also includes light path converting device and dmd chip (all not shown in figure).Through the modulation of dmd chip, three primary colours light arrives camera lens 3 then through refraction repeatedly, convergence.
Projector equipment in the present embodiment four is ultrashort out-of-focus projection equipment, is suitable for family or portable use, and therefore camera lens 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 image in low projection.Light arrives camera lens 3 after DMD modulates, and by camera lens one group of optical glass, including multi-disc convex lens, concavees lens, non-spherical lens etc., is finally projected on projection screen 4 and forms projection picture.
Wherein, as shown in figure 13, LASER Light Source 1 specifically includes laser instrument the 11, first colour wheel 15 and the second colour wheel 16；In embodiments of the present invention, laser instrument is blue laser, sends blue laser, and as the excitation light source of fluorescence.Wherein, the first colour wheel is fluorescent material wheel, and 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 subregion and three primary colours colour filter subregion, in being embodied as, for laser part, owing to purity is higher, filter wheel can be correspondingly arranged transparent region and laser is carried out transmission, for fluorescence, owing to the purity relative laser of fluorescence is relatively low, the light filter requiring over corresponding color carries out colour filter, enters once to improve the purity of color；Fluorescent material wheel 15 includes phosphor region and transmission area, the wherein generally transparent glass of transmission area, for the transmission laser when fluorescent wheel rotates to this position, phosphor region includes green and yellow fluorescent powder district (not shown), is used for receiving blue laser irradiation and excites generation green fluorescence and yellow fluorescence.Wherein, green fluorescence district, blue light transmission area, yellow fluorescence district 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 by diagram it can be seen that the two colour wheels plane that each rotates place is mutually perpendicular, but the present embodiment only gives a kind of non-coaxial concrete mode, limits and this.
In the present embodiment, fluorescent wheel 15 is reflective fluorescent wheel, blue laser is after the transmissive region of fluorescent wheel 15, also can through the relay lens group being arranged at the fluorescent wheel back side, first eyeglass the 12, second eyeglass the 13, the 3rd eyeglass 14 as shown in Figure 11, these optical glasss include the optical glasss such as plane mirror, convex lens or diffusion sheet, form blue laser loop and are back to fluorescent wheel front, it is incident to conjunction light eyeglass 17, carries out closing light with the fluorescence being excited.
After three primary colours actinic light, then pass sequentially through filter wheel 16, specifically, pass sequentially through the position subregion of corresponding color in filter wheel, form the three primary colours light output of timing, arrive and be positioned at LASER Light Source x ray machine part below, it is provided that illumination.
Except the subregion making two colour wheel corresponding color is consistent, on such as fluorescent wheel 15, the center of circle angle in green fluorescence district is 108 degree, on so corresponding filter wheel, the center of circle angle of green color subregion arranges and is also 108 degree, also needs to two colour wheel synchronous rotaries simultaneously, keeps geo-stationary.
Can synchronous rotary for realizing fluorescent material wheel and filter wheel, the embodiment of the present invention takes the method and system proposed in above-described embodiment one, two, three to realize: as shown in Figure 3, fluorescent material wheel 15 in the corresponding Figure 13 of first colour wheel 1, the filter wheel 16 in the corresponding Figure 13 of the second colour wheel 2；Fluorescent material wheel and filter wheel are respectively provided with the first labelling and the second labelling, and two positions being marked on two colour wheels are corresponding.
To sum up, the laser projection device of the embodiment of the present invention, non-coaxial it is provided with the first colour wheel and fluorescent wheel and the second colour wheel and filter wheel, the first labelling and the second labelling it is provided with respectively on the position that the first colour wheel and the second colour wheel are corresponding, first labelling and the second labelling are followed colour wheel and are rotated, by obtaining this first labelling and inductive impulse signal corresponding to the second labelling, this inductive impulse signal is cyclic pulse signal, Tong Bu with the swing circle of colour wheel, above-mentioned first labelling and the second labelling are the sync mark of two colour wheels.Therefore, by synchronizing described first inductive impulse signal and the second inductive impulse signal, reach the purpose indirectly the first colour wheel and the second colour wheel synchronized.
And, in order to eliminate the colour mixture time period caused due to the rigging error of sync mark stickup, also further by obtaining the beam brightness signal of the second colour wheel output, by judging the saltus step of beam brightness signal, on first time synchronous foundation, the rotating speed of two colour wheels is adjusted so that bound-time threshold value is 0, thus reaching the accurate synchronization of two colour wheels, also further ensure timing and the purity of the output of light source primary colours
Compared to prior art, the secondary colour that when embodiment of the present invention scheme can be completely eliminated two kinds of color of light switchings, place exists, improve the precision of synchronization, due to without adopting adjustment means to reject secondary colour, it is possible to increase the brightness of optical signal of light source output and purity also ensure that the output timing of three primary colours light.
It should be noted that, in embodiments of the present invention, LASER Light Source is to produce the fluorescence of two kinds of colors for two kinds of fluorescent material of blue monochromatic laser excitation to be illustrated the work process of light source, can also being two-color laser light source, one of which LASER Light Source excites one or both fluorescent material to be collectively forming three primary colours light.The work process of its light source is similar with above-described embodiment content, skilled addressee readily understands that and derive, not repeating them here.
Obviously, the present invention can be carried out various change and modification without deviating from the spirit and scope of the present invention by those skilled in the art.So, if these amendments of the present invention and modification belong within the scope of the claims in the present invention and equivalent technologies thereof, then the present invention is also intended to comprise these change and modification.
Claims (11)
1. the double-colored of light source takes turns a synchronisation control means, is applied to non-coaxial first colour wheel and the second colour wheel, it is characterised in that on position corresponding with the second colour wheel on described first colour wheel, arrange the first labelling respectively, the second labelling；
Described synchronisation control means includes:
Obtaining corresponding described first labelling and the first inductive impulse signal of described second labelling, the second inductive impulse signal respectively, described inductive impulse signal is cyclic pulse signal；
Synchronize described first inductive impulse signal and the second inductive impulse signal.
2. the double-colored of light source according to claim 1 takes turns synchronisation control means, it is characterised in that
After the described first inductive impulse signal of described synchronization and the second inductive impulse signal, also include:
Obtaining the beam brightness signal by the second colour wheel output, wherein, the second colour wheel is arranged in the first colour wheel output light path；
Described first colour wheel and the second colour wheel are carried out second synchronization by the saltus step according to described beam brightness signal.
3. the double-colored of light source according to claim 1 takes turns synchronisation control means, it is characterised in that
The described first inductive impulse signal of described synchronization and the second inductive impulse signal specifically include:
In a swing circle, compare rising edge or the trailing edge difference of the first inductive impulse signal and the second inductive impulse signal described in synchronization,
Adjust the rotating speed of described first colour wheel or the second colour wheel, make the rising edge of described first inductive impulse signal and the second inductive impulse signal or trailing edge overlap.
4. the double-colored of light source according to claim 2 takes turns synchronisation control means, it is characterised in that described first colour wheel and the second colour wheel are carried out second synchronization and specifically include by the described saltus step according to described beam brightness signal:
Obtain the brightness flop bound-time threshold value in described beam brightness signal,
Adjusting the first colour wheel or the rotating speed of the second colour wheel, making described brightness flop bound-time threshold value is 0.
5. the double-colored of light source according to claim 4 takes turns synchronisation control means, it is characterised in that the rotating speed of described adjustment the first colour wheel or the second colour wheel, and making described brightness flop bound-time threshold value is 0 specifically include:
Rotating speed and described brightness flop bound-time threshold value according to described first colour wheel or the second colour wheel determine that the circumferential length between two colour wheels is poor,
With one of them rotating speed of described first colour wheel and the second colour wheel for benchmark, and poor according to described circumferential length, change wherein another rotating speed, until described brightness flop bound-time threshold value becomes 0.
6. the double-colored of light source according to claim 1 takes turns synchronisation control means, it is characterised in that the rotating speed of described adjustment the first colour wheel or the second colour wheel, and making described brightness flop bound-time threshold value is also include after 0:
The rotating speed adjusting described first colour wheel or the second colour wheel makes the two synchronized rotations of colour wheel.
7. the double-colored of light source takes turns a synchronous control system, including non-coaxial first colour wheel and the second colour wheel, it is characterised in that also include: be separately positioned on the first labelling on the first colour wheel and position corresponding to the second colour wheel and the second labelling；
First sensor, for obtaining the first inductive impulse signal of described first labelling,
Second sensor, for obtaining the second inductive impulse signal of described second labelling,
Synchronous control unit, is used for synchronizing described first inductive impulse signal and the second inductive impulse signal.
8. the double-colored of light source according to claim 7 takes turns synchronous control system, it is characterised in that also include the 3rd sensor, and for obtaining the beam brightness signal by the second colour wheel output, wherein, wherein, the second colour wheel is arranged in the first colour wheel output light path；
And, described first colour wheel and the second colour wheel are carried out second synchronization by the saltus step that described synchronous control unit is additionally operable to according to described beam brightness signal.
9. the double-colored of light source according to claim 7 takes turns synchronous control system, it is characterised in that
Described synchronous control unit also includes comparison module, in a swing circle, compares rising edge or the trailing edge difference of the first inductive impulse signal and the second inductive impulse signal described in synchronization；
And, described synchronous control unit also includes adjusting module, for adjusting the rotating speed of described first colour wheel or the second colour wheel.
10. the double-colored of light source according to claim 8 takes turns synchronous control system, it is characterised in that described first colour wheel is fluorescent wheel, and described second colour wheel is filter wheel.
11. a laser projection device, including LASER Light Source, it is characterised in that the double-colored of light source that described LASER Light Source includes as described in claim 7-10 any one claim takes turns synchronous control system.
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| CN201711107759.XA Active CN107991834B (en) | 2015-11-04 | 2016-03-02 | Double-color wheel synchronous control method of light source |
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| CN108234976B (en) * | 2017-12-29 | 2021-07-27 | 河南宏昌科技有限公司 | DLP projection display driving system supporting various laser light sources |
| CN110955103A (en) * | 2018-09-26 | 2020-04-03 | 中强光电股份有限公司 | Projection device and light source module thereof, wavelength conversion wheel and filter wheel synchronization method |
| CN111812931A (en) * | 2019-04-11 | 2020-10-23 | 卡西欧计算机株式会社 | Projection apparatus, projection control method, and storage medium |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105607401A (en) | 2016-05-25 |
| CN105824178B (en) | 2017-12-15 |
| CN105607401B (en) | 2017-10-24 |
| CN107991834B (en) | 2020-05-15 |
| CN105759547B (en) | 2017-10-24 |
| CN107991834A (en) | 2018-05-04 |
| CN105824178A (en) | 2016-08-03 |
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