CN105607401A - Synchronous control method for double color wheels of light source - Google Patents
Synchronous control method for double color wheels of light source Download PDFInfo
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- CN105607401A CN105607401A CN201610115865.1A CN201610115865A CN105607401A CN 105607401 A CN105607401 A CN 105607401A CN 201610115865 A CN201610115865 A CN 201610115865A CN 105607401 A CN105607401 A CN 105607401A
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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 synchronous control method for double color wheels of a light source. Through two synchronous processes, the synchronization precision degrees of non-coaxially designed color wheels are improved; a mixed color time period between two colors is eliminated; and the purity and the time sequences of output colors of the color wheels are improved.
Description
The application requires the priority of the Chinese patent application 201510739594.2 that the denomination of invention submitted on November 4th, 2015 is " double-colored synchronisation control means, system and the laser projection device of taking turns of light source ".
Technical field
The present invention relates to LASER Light Source technical field, relate in particular to a kind of double-colored synchronisation control means of taking turns of light source.
Background technology
LASER Light Source is as a kind of solid state light emitter, has highlightedly, efficient, and the series of advantages such as the life-span is normal, and colour gamut is good, environmental protection becomes the selection of emerging projection light source.
In the light source that the fluorescence that the laser using in industry at present and fluorescent material are excited to produce forms, conventionally use LASER Light Source and the exciting light light source of blue laser as laser projection system. in a kind of implementation of prior art, blue laser is got on fluorescent wheel and can be excited green emitting phosphor and yellow fluorescent powder to produce respectively green light and sodium yellow, then from sodium yellow, filters and obtain red light (directly excited by red fluorescence powder to produce the conversion efficiency of red fluorescence lower). in order to obtain three primary colours monochromatic light, filter wheel is set in light path, filter wheel is arranged in the output light path of fluorescent wheel, green or the cyan optical filter of colour wheel obtain green monochromatic light to the green light that fluorescent wheel produces after filtration, the sodium yellow that fluorescent wheel produces the after filtration Red lightscreening plate of colour wheel obtains red monochromatic light, in addition, conventionally in system, can increase part sodium yellow and improve brightness, the clear area that the sodium yellow that fluorescent wheel produces directly sees through filter wheel obtains yellow monochromatic light, blue laser is blue monochromatic light, do not need colour filter, the clear area that directly sees through fluorescent wheel and filter wheel enters light path system. blue laser obtains three primary colours and yellow monochromatic light by fluorescent wheel and filter wheel, therefore fluorescent wheel and filter wheel is synchronously to obtain the monochromatic key of three primary colours, for ensureing in a sequential section, by only having a kind of color output after filter wheel, such as in the time that fluorescent wheel is exported green glow, filter wheel also rotates to green glow filter area, otherwise may cause the stack of output different colours, color changes, and confusion also occurs three primary colours proportioning, cannot form the three primary colours of normal timing output.
It in prior art, is the synchronism that ensures two-wheel, conventionally adopt the mode of coaxial design to realize, as shown in Figure 1, fluorescent material wheel 11 adopts and is coaxially connected with filter wheel 12, the two place plane is parallel to each other, be placed on the light emitting path of LASER Light Source 13, and ensure in double-colored wheel, the color subregion of fluorescent material wheel (comprises phosphor region and transmission area, wherein the color of transmission area can be considered the color through the laser of this transmission area) distribute corresponding with three look color filter regions of filter wheel, adopt same motor 14 to drive rotation according to certain frequency, realize double-colored synchronous rotary of taking turns.
In above-mentioned method for designing, need to the boundary line of the color subregion of the same race in fluorescent material wheel and filter wheel is accurately corresponding, be that the projection that on two-wheeled, color subregion boundary line is axially gone up should overlap, and this Standard technology difficulty is high, once machine, two-wheeled all fixes with rotating shaft, therefore process and install the offset error causing by immutable, and there is drift in various degree in each colour wheel, all can cause therefore in double-colored wheel and have the overlapping of certain angle between two kinds of different colours, form secondary colour, and there is in order to eliminate two kinds of color of light intersections the secondary colour being produced by factors such as rigging error and colour wheel drifts, conventionally need to reject the overlapping secondary colour of certain angle between two colors, but can reduce so each monochromatic brightness.
Need to propose a kind of double-colored synchronisation control means of taking turns, under the non-coaxial prerequisite of two-wheeled, also can ensure synchronous uniformity.
Summary of the invention
The object of this invention is to provide a kind of double-colored synchronisation control means of taking turns of light source, solution is coaxial double-colored synchronous control technique problem of taking turns by no means.
The object of the invention is to be achieved through the following technical solutions:
The double-colored synchronisation control means of taking turns of light source, comprising:
In a swing circle, carry out synchronous for the first time according to inductive impulse signal to the first colour wheel and described the second colour wheel;
After synchronous for the first time described in obtaining, by the beam brightness signal of the second colour wheel output;
Carry out synchronous for the second time according to described beam brightness signal to described the first colour wheel and the second colour wheel.
Embodiment of the present invention technical scheme, at least has following technique effect or advantage to be:
The double-colored synchronisation control means of taking turns of the light source that the embodiment of the present invention proposes, can improve by twice synchronizing process the synchronous precision degree of the colour wheel of non-coaxial design, and can eliminate the colour mixture time period, and needn't reject, and can reduce the luminance loss of light source.
Particularly, in a swing circle, two colour wheels are carried out first synchronous according to inductive impulse signal, thereby complete the first subsynchronous of two colour wheels, and because inductive impulse is to obtain with reference to the sync mark of colour wheel, if there is deviation in sync mark, first hyposynchronous result still likely causes in the light beam of the second colour wheel output doped with colour mixture section, again by the variation of the colour mixture section that after the second colour wheel, brightness variable signal that export, light beam reflects, two colour wheels are carried out synchronous for the second time, make light source output non-mixed color section, two colour wheels reach Complete Synchronization.
Technique scheme has realized the double-colored of non-coaxial design and has taken turns synchronous uniformity, thereby has also ensured purity and the timing of the output of light source final color.
Brief description of the drawings
Fig. 1 is the double-colored structural representation of taking turns coaxial design of available technology adopting;
Fig. 2 is the double-colored synchronisation control means flow chart of taking turns that the embodiment of the present invention one proposes;
Fig. 3 is the non-coaxial double-colored structural representation of taking turns that the embodiment of the present invention one proposes;
Fig. 4 is a kind of colour wheel of proposing of the embodiment of the present invention two and the corresponding relation schematic diagram of sync mark;
Fig. 5 is another colour wheel of proposing of the embodiment of the present invention two and the corresponding relation schematic diagram of sync mark;
Fig. 6 is the double-colored synchronisation control means flow chart of taking turns of the light source that proposes of the embodiment of the present invention two;
Fig. 7 is the two colour wheels oscillogram of synchronous front inductive impulse signal for the first time in the embodiment of the present invention two;
Fig. 8 is the double-colored oscillogram of synchronous rear inductive impulse signal for the first time of taking turns in the embodiment of the present invention two;
Fig. 9 is mark rigging error schematic diagram in the embodiment of the present invention two;
Figure 10 is the relatively schematic diagram of double-colored pulse signal of taking turns of the rigging error shown in corresponding diagram 9;
Figure 11 is the embodiment of the present invention two brightness variable signal voltage waveform views.
Detailed description of the invention
In order to make the object, technical solutions and advantages of the present invention clearer, below in conjunction with accompanying drawing, the present invention is described in further detail, and obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiment. Based on the embodiment in the present invention, those of ordinary skill in the art, not making all other embodiment that obtain under creative work prerequisite, belong to 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 elaborated.
Embodiment mono-
The embodiment of the present invention provides a kind of double-colored synchronisation control means of taking turns of light source, is applied to the double-colored Synchronization Control of taking turns of non-coaxial design, as shown in Figure 2, comprising:
S10: in a swing circle, carry out synchronous for the first time according to inductive impulse signal to the first colour wheel and described the second colour wheel;
Particularly, in a swing circle, obtain respectively the first inductive impulse signal, the second inductive impulse signal of corresponding the first colour wheel, the second colour wheel, the swing circle of the first inductive impulse signal and the second inductive impulse signal difference the first colour wheel and the second colour wheel is synchronous
Adjust the rotating speed of the first colour wheel or the second colour wheel, make the first inductive impulse signal and the second inductive impulse signal synchronous,
Complete described the first colour wheel and described the second colour wheel synchronous for the first time.
In above-mentioned the first hyposynchronous process, conventionally need first the first colour wheel and the second colour wheel to be adjusted into synchronized rotation, and just complete synchronizing process in a swing circle, make two colour wheels close as far as possible on different color subregions, although avoid synchronized, the processing of color differed to more than one color subregion. The benefit of processing is like this, can avoid following when synchronous for the second time, brightness variation abnormality, if because the various primary colours not in a subregion produce mixed lights, can produce and the diverse magnitude of voltage of each reference voltage, cannot effectively obtain the abnormal time threshold value that brightness changes.
S11: after synchronous for the first time described in obtaining, by the beam brightness signal of the second colour wheel output;
Particularly, in light path arranges, the second colour wheel is positioned at after the first colour wheel, and the brightness variable signal of the light beam of exporting through the second colour wheel can reflect the brightness situation of change of the each primary colours color of light source, if there is colour mixture section to exist, in brightness variable signal, there is burr or abnormal saltus step situation.
S12: carry out synchronous for the second time to described the first colour wheel and the second colour wheel according to described beam brightness signal.
Particularly, the brightness of obtaining in described beam brightness signal changes bound-time threshold value,
Adjust the rotating speed of the first colour wheel or the second colour wheel, making described brightness change bound-time threshold value is 0,
Complete described the first colour wheel and the second colour wheel synchronous for the second time.
According to whether existing brightness to change bound-time threshold value in beam brightness signal, and the variation tendency of time threshold judges the synchronous situation of two colour wheels, and by adjusting colour wheel rotating speed, be 0 to complete synchronous for the second time to two colour wheels by making brightness change bound-time threshold value.
The double-colored synchronisation control means of taking turns that the embodiment of the present invention one provides, in a swing circle, two colour wheels are carried out first synchronous according to inductive impulse signal, thereby complete the first subsynchronous of two colour wheels, and because inductive impulse is to obtain with reference to the sync mark of colour wheel, if there is deviation in sync mark, first hyposynchronous result still likely causes in the light beam of the second colour wheel output doped with colour mixture section, again by exporting after the second colour wheel, the variation of the colour mixture section that the brightness variable signal of light beam reflects, two colour wheels are carried out synchronous for the second time, make light source output non-mixed color section, two colour wheels reach Complete Synchronization.
Technique scheme has realized double-coloredly takes turns synchronous uniformity, thereby has also ensured purity and the timing of the output of light source final color.
Embodiment bis-
The embodiment of the present invention two provides the double-colored synchronisation control means of taking turns of another light source, is applied to non-coaxial double-colored wheel in control as shown in Figure 3.
As shown in Figure 3, the first colour wheel 1 and the second colour wheel 2, be connected with respectively CD-ROM drive motor rotating shaft 12 and 22 to drive wheel face to do Periodic Rotating motion, as shown in Figure 2, CD-ROM drive motor rotating shaft 12 He22 center extended lines intersect at angle, can be acute angle, right angle or obtuse angle, be vertical relation in this example. Also, the rotating shaft of the first colour wheel 1 and the second colour wheel 2 is non-coaxial, and accordingly, two colour wheel wheel face place planes neither space parallel relation, but intersects at an angle. In the example depicted in fig. 3, a kind of position that has only provided the first colour wheel and the second colour wheel rotating shaft arranges relation, does not limit therewith.
Wherein, the first colour wheel can be fluorescent wheel, on fluorescent wheel, there is green emitting phosphor district, blue laser transmission area, yellow fluorescent powder district is (because red fluorescence powder launching efficiency is low, therefore alternative with yellow fluorescent powder, but the effect that obtains ruddiness according to its final filtration still can be described as red subregion), the second colour wheel can be filter wheel, on filter wheel, there is green color filter regions, blue laser transmission area, red color filter regions respectively with fluorescent wheel on green emitting phosphor district, blue laser transmission area, yellow fluorescent powder district has identical angle and order distributes. Wherein red color filter regions is corresponding with yellow fluorescent powder district, for filtering and obtain red fluorescence from yellow fluorescence, thereby exports successively red, green, blue three primary colours from filter wheel. The subregion of above-mentioned fluorescent wheel and filter wheel is only example.
When synchronous, need to carry out synchronously according to the inductive impulse signal of two colour wheels two colour wheels being carried out for the first time. And obtaining of the inductive impulse signal of corresponding colour wheel, can be by sync mark is set on colour wheel, sync mark is rotated with colour wheel, and sensor is surveyed sync mark, thereby obtains the inductive impulse signal of synchronizeing with colour wheel.
Particularly, being provided with the first mark 11 on the first colour wheel 1, being provided with the second mark 21 on the second colour wheel 2, particularly, is the CD-ROM drive motor side surface that lays respectively at the first colour wheel and the second colour wheel. and the first mark 11 and the second mark 21 position on colour wheel under is separately corresponding. owing to thering is corresponding color subregion on the first colour wheel and the second colour wheel, conventionally can be with color subregion as a reference, by the first mark 11 and the second mark 12, the setting position in CD-ROM drive motor rotating shaft 12 and 22 and a certain color subregion on affiliated colour wheel carry out correspondingly, mark whether that position corresponds to each other thereby be convenient to compare two. in the concrete enforcement of one, the first mark 11 aligns with the borderline phase of same color subregion on affiliated colour wheel respectively in the original position of CD-ROM drive motor rotating shaft 22 side surfaces at original position and second mark 21 of CD-ROM drive motor rotating shaft 12 side surfaces, ratio as shown in Figure 4, on the original position of setting mark and colour wheel, the boundary of a certain color aligns, the boundary of this color is the reference original position for mark on colour wheel, particularly, the original position of the first mark 11 is alignd with the borderline phase of the first colour wheel 1 Green subregion, the original position of the second mark 21 is alignd with the borderline phase of the green partition in the second colour wheel 2, because color in colour wheel is that subregion is connected with each other, therefore in this example, border refers to the line of demarcation of two kinds of colors, can be regarded as the boundary position of green partition and next color. those skilled in the art easily understand and derive, and the first mark and the second mark also can 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, also can be, all displacements identical with same color boundaries distance, as shown in Figure 5, two marks respectively with two colour wheels on the border of green partition be departing from of φ angle, be also a kind of corresponding situation in position being marked on two colour wheels that has, now, the RADIAL that departs from green partition border φ angle on colour wheel is the reference original position of colour wheel for mark.
In aforementioned prior art, also mention, the first colour wheel and the second colour wheel need each color subregion to correspond to each other when rotated, in the time that the first colour wheel rotates to green partition, the second colour wheel also will rotate to green partition (actual functional capability is that green is carried out to colour filter), guarantee is green through the color of the light of the second colour wheel outgoing, otherwise may there is the overlapping of color and sequential confusion, cannot normally form three primary colours output.
The synchronisation control means of non-coaxial the first colour wheel 1 and the second colour wheel 2 in LASER Light Source is described below in conjunction with Fig. 6.
Method comprises the following steps:
Step S21: in a swing circle, obtain respectively corresponding described the first colour wheel, the first inductive impulse signal of the second colour wheel, the second inductive impulse signal, described the first inductive impulse signal and the second inductive impulse signal are synchronizeed with the swing circle of described the first colour wheel and the second colour wheel respectively;
Particularly, in a swing circle, obtain respectively the inductive impulse signal of corresponding the first mark and the second mark, this first mark and the second sync mark being labeled as on two colour wheels.
In embodiment of the method, be labeled as black thin film or black belt or carbonization mark, black has extinction effect, therefore in the process that the signal that sensor sends rotates in CD-ROM drive motor rotating shaft, while running into the density bullet of above-mentioned rotating shaft side surface, be absorbed, thereby the signal reflex that the unmarked part in motor shaft side is sent sensor returns to be detected by sensor, therefore, while detecting the first colour wheel and the second colour wheel rotation status with sensor, the optical signal sending by sensor is absorbed and situation about reflecting can sense the existence of the first mark and the second mark and form the pulse signal that low and high level forms, thereby in a swing circle, get respectively the inductive impulse signal of corresponding the first mark, and the inductive impulse signal of corresponding the second mark, using these two inductive impulse signals as inductive impulse signal.
The swing circle here, refers to the time that two colour wheels rotate a circle separately. When system initial start, two colour wheels at the uniform velocity rotate after accelerating in the same way identical rotating speed simultaneously, make the first mark relative static with the second mark, then in a swing circle, obtain respectively the inductive impulse signal of corresponding the first mark and the second mark, obtain the first inductive impulse signal and the brightness variable signal of corresponding the first colour wheel and the second colour wheel.
Step S22: adjust the rotating speed of the first colour wheel or the second colour wheel, make described the first inductive impulse signal and the second inductive impulse signal synchronous.
Particularly, relatively 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 the first colour wheel or the second colour wheel, the rising edge of described the first inductive impulse signal and the second inductive impulse signal or trailing edge are overlapped, thereby make two inductive impulse signals synchronous.
In the inductive impulse signal of corresponding the first mark, include the rectangular pulse that possesses rising edge and trailing edge that embodies the first mark, in the inductive impulse signal of corresponding the second mark, include the rectangular pulse that possesses rising edge and trailing edge that embodies the second mark.
In a swing circle, if also unrealized synchronous rotary of the first colour wheel and the second colour wheel, rising edge or trailing edge that the first mark and second is marked at synchronization have position difference. Or, while showing as the first mark and the second mark through same position, there is time difference.
As shown in Figure 7, the first colour wheel and the second colour wheel rotate a circle, the rectangular pulse that the first mark is corresponding and rectangular pulse corresponding to the second mark, 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 and do not overlap.
According to inductive waveform and inductive waveform corresponding to the second mark that in inductive impulse signal, the first mark is corresponding, can obtain the time difference between two marks of two colour wheels, can calculate the circumferential length difference S between two marks in two colour wheels according to time difference, wherein, S=2 π nRt, n is rotating speed, and R is the radius of mark to colour wheel center, and t is the time, two colour wheels are synchronized while at the uniform velocity rotating, between two-wheeled, be relatively static, can keep the rotating speed of one of them colour wheel constant, and adjust the rotating speed of another colour wheel, shorten the circumferential length difference S between two marks, also shortened the time difference between two marks, computing formula by rotating speed and circumferential length can calculate the adjustment time, by controlling the adjustment time, circumferential length difference S is shortened to zero, the time difference between two marks is also zero, and then the identical at the uniform velocity rotation of the rotating speed of adjusting two colour wheels, thereby realize the synchronous of two colour wheels.
At this, only provide a kind of method of adjusting colour wheel rotating speed, also can keep the rotating speed of a colour wheel constant, reduce the rotating speed of another colour wheel, calculate circumferential length difference is foreshortened to 0 adjustment time, after adjustment, again two-wheeled is driven according to same rotating speed.
It should be noted that, in this method embodiment, the first mark and the second mark Main Function are as the sync mark of setting, and can also calculate the rotating speed that motor shaft is colour wheel according to the number of pulse signal in a swing circle of colour wheel simultaneously, play the effect that detects colour wheel rotating speed. Thereby rotating speed that can Real-time Obtaining colour wheel, changes the rotating speed of colour wheel by adjusting the power etc. of drive circuit.
Through the Synchronization Control of above-mentioned steps, for the same position on two given colour wheels, the pulse signal that is marked at synchronization of the first colour wheel shown in Fig. 7 and the second colour wheel is there is to the situation of position difference, the inductive impulse signal rising edge that is adjusted into two colour wheel marks shown in Fig. 8 overlaps, and two marks are realized synchronous. Due to the first and second marks, the position identical with the second colour wheel with the first colour wheel is corresponding respectively, and two colour wheels have also just been realized basic synchronous. Owing to thering is corresponding color subregion on two colour wheels, and the order of color subregion is fixed, in the time that colour wheel is realized basic synchronization, the same color subregion of two colour wheels is also corresponding all the time in rotary course, realize matching relationship, while rotating to green partition such as the first colour wheel, the second colour wheel also rotates to green partition just so, thereby has realized the output of green glow. Double-colored take turns synchronous basic goal be also make light at one time in section successively by same color subregion on two colour wheels, thereby ensure final by the timing of each color in the three primary colours of the second colour wheel output.
But due to rigging error reason, as the first mark of sync mark of setting and the second mark may with the reference original position on corresponding colour wheel, such as departing from the alignment that the position of green partition border φ angle can not be absolute in the border of Fig. 3 Green subregion or Fig. 4, may there is millimeter or the deviation of subsection rank more, as shown in Figure 9, being marked at theoretic setting reference position is at green partition border GL line, depart from but may exist when practical set the deviation that former reference position GL is φ 1 angle, the mark after assembling does not overlap with theory setting position completely, the same color original position of two colour wheels also just and unrealized absolute synchronous so, will be still by different color subregion in two colour wheels in the time rotating in this deviation time period of process through the light of two colour wheel outgoing, although this overlapping region is very little, but still can form the mixed light of different colours. this deviation not only has influence on a kind of color generation colour mixture simultaneously, because each color subregion is fixed and corresponds to each other, this overlapping dislocation in other words can be extended in two kinds of colors below, cause other two kinds of colors that colour mixture also occurs, once therefore there be error, for three primary colours, within a cycle, have the colour mixture phase of 3 periods.
After realization is just subsynchronous, due to two inductive impulse signals corresponding the first marks and the second mark respectively, the rising edge of two inductive impulse signals overlaps, and represents that the first mark and the second mark are synchronous. But due to the rigging error existing as shown in Figure 9, in the time that mark is set, the first mark apart from the first colour wheel can not complete matching with reference to original position with reference to original position and the second mark and the second colour wheel, although so just cause the pulse signal of the sync bit mark of setting synchronous, the reference original position of two colour wheels does not overlap completely at synchronization. As shown in Figure 8, there is the error of t1 time variable with reference to original position in first mark rising edge signal distance the first colour wheel, there is the error of t2 time variable with reference to original position in second mark rising edge signal distance the second colour wheel, wherein, t1, t2 is all more than or equal to 0, if first marking path the first colour wheel is zero with reference to the distance of original position, i.e. alignment just, t1=0 so. Suppose t2 > t1, so just in subsynchronous inductive impulse signal afterwards, between the first colour wheel and the second colour wheel, still there is the error of t2-t1 time variable, Figure 10 is the another kind of form of expression of Fig. 8, be reference original position taking two-wheeled as benchmark, suppose double-colored must be at synchronization through this position, so due to mark and the rigging error skew existing with reference to original position in taking turns rotary course,, there is t2-t1 time residual quantity in not the lining up of pulse signal that will cause two small marks. Although the error being produced by mark assembling is in the error range allowing, but can cause the stack of color, form colour mixture look section, therefore consider from the actual conditions of the actual output of color, the reference original position of the first colour wheel and the second colour wheel to be in alignment with each other being adjusted at synchronization, realize the further synchronous of the first colour wheel and the second colour wheel.
The mixed color phenomenon bringing for eliminating this error, realizes precisely synchronously, and the double-colored synchronisation control means of taking turns that the embodiment of the present invention provides also comprises:
Step S23: after synchronous for the first time described in obtaining, by the beam brightness signal of the second colour wheel output;
In concrete enforcement, conventionally by being set in light path, light sensation sensor or luminance sensor obtain the beam brightness signal in the second colour wheel output light path.
Beam brightness signal is converted to voltage signal by AD, in each beam brightness period of change, the voltage signal of one-period comprises multiple different magnitudes of voltage accordingly, the brightness of the primary colours that different magnitude of voltage correspondences is different, such as blue light corresponding brightness L1, ruddiness corresponding brightness L2, green glow corresponding brightness L3.
Brightness variable signal oscillogram as shown in figure 11, this brightness variable signal is a voltage waveform signal, can from the output light light path of the second colour wheel, obtain, because different colors has different brightness, different brightness can be converted to different magnitudes of voltage by sensor, thereby the different colours in the corresponding three primary colours of different magnitudes of voltage, because the voltage magnitude of the output of random color is determined, between any two kinds of colors, voltage magnitude is saltus step, and secondary colour shows as voltage change unusual part between two kinds of colors. Therefore, sync mark is pasted the error causing and can be showed with abnormal saltus step or the burr of voltage.
Step S24: the brightness of obtaining in described beam brightness signal changes bound-time threshold value;
Particularly, in a beam brightness period of change, obtain in light source three primary colours or four primary colours, the brightness of one of them primary colours changes bound-time threshold value.
According to voltage change waveform as shown in figure 11, can determine 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, is 0 o'clock at this time threshold, and two colour wheels are realized accurate synchronous rotary.
Step S25: adjust the rotating speed of the first colour wheel or the second colour wheel, making described brightness change bound-time threshold value is 0.
Particularly, determine that according to the rotating speed of the first colour wheel or the second colour wheel and brightness variation bound-time threshold value the circumferential length between two colour wheels is poor,
Taking one of them rotating speed of the first colour wheel and the second colour wheel as benchmark, and poor according to circumferential length, change wherein another rotating speed, until changing bound-time threshold value, described brightness becomes 0.
Method of adjustment to the first colour wheel and the second colour wheel in the similar synchronizing process for the first time of above-mentioned concrete method of adjustment, obtain the time residual quantity t2-t1 shown in Figure 11, and know the rotating speed of current colour wheel by measurement markers pulse number, learn according to aforesaid computing formula, reaching two colour wheels needs the circumferential length S of process with reference to original position alignment, afterwards, taking the first colour wheel as benchmark, adjust the rotating speed of the second colour wheel, or, taking the second colour wheel as benchmark, adjust the rotating speed of the first colour wheel, after at the circumferential length between two colour wheels, poor or time difference is contracted to 0, adjust two synchronized rotations of colour wheel, making magnitude of voltage bound-time threshold value is 0, thereby two kinds of color voltage magnitude saltus step unusual parts are eliminated, in this moment, two colour wheels have reached Complete Synchronization. but due to adjusting in the process of magnitude of voltage bound-time threshold value, change the rotating speed of one of them colour wheel, for the timing output of color, needed the synchronized rotation of two colour wheels. therefore, embodiment of the present invention method also comprises:
Step S26: the rotating speed of adjusting described the first colour wheel or the second colour wheel makes the synchronized rotation of two colour wheels.
Above-mentioned, the first colour wheel and the second colour wheel are first by synchronizeing between the just subsynchronous sync bit mark of realizing two colour wheels settings, eliminate because of the sequencing difference in two colour wheel sync bit mark life periods under same rotational speed, both rising edge of a pulses overlap and represent that the mark of dichromatism wheel is synchronous, eliminate and set sync bit mark and cause the mixed color phenomenon occurring between different colours with reference to the rigging error of original position by secondary Synchronization Control, to consider that the actual color situation of the light beam of the second colour wheel outgoing carries out secondary inching on the sync bit mark basis of setting, realize double-colored accurate Synchronization Control of taking turns.
Compare the existing coaxial double-colored synchronisation control means of taking turns, the double-colored synchronisation control means of taking turns of the non-coaxial setting that the embodiment of the present invention provides, can be according to the sync bit mark of setting, be positioned at the first mark of the first colour wheel and inductive impulse signal corresponding to the second mark of the second colour wheel carries out first Synchronization Control, rigging error for mark also can be eliminated by eliminating the colour mixture time period, thereby be different from prior art coaxial double-colored the medium speed identical and situation that error exists all the time all the time of taking turns, the flexibility of synchronisation control means provided by the invention is strong, can realize accurately double-colored take turns synchronous.
And, owing to connecting double-colored wheel and reject two kinds of secondary colours between color in scheme without picture is coaxial, only picking out the monochromatic period of pure color utilizes, embodiment of the present invention scheme can all be utilized the light in the whole cycle, thereby can improve the monochromatic brightness of output, also improved the purity of the color of colour wheel output, and the color saturation of system output image.
While is with respect to the mode of artificial adjustment, the synchronisation control means of the embodiment of the present invention has not only been saved cost of labor, and can eliminate because different people in manual adjustment mode is to the different color-match errors that cause of color sensitivity, greatly improve double-colored precision of taking turns color-match.
And, in the time that the reference original position on colour wheel is positioned at color boundaries, the original position of the first mark and the second mark also aligns with the same color boundaries of corresponding affiliated colour wheel respectively, thereby the inductive impulse signal obtaining according to sensor, not only can weigh the synchronous degree of two marks, rising edge (in the time that effective impulse is high level pulse) or the trailing edge (in the time that effective impulse is low level pulse) of its pulse have also represented this initial time with reference to the color of original position, can be by judging that the arriving of pulse signal knows the startup color of system, due to each color subregion and sequentially fixing on colour wheel, thereby also can know the color sequential of system. such as, when the green partition border of the first colour wheel, such as being the border adjacent with red subregion when with reference to original position, the original position of the first mark is corresponding to green partition border, accordingly, the original position of the second mark is corresponding to the green partition borderline phase alignment of the second colour wheel, in the time that sensor detects the pulse induction pulse signal of the first mark and the second mark, known, the rising edge of inductive impulse signal pulse or trailing edge have represented the beginning of green color, and the order of three primary colours is green, blue, red such output orders. in the time of practical application, can be by the set-up mode that mark and color boundaries are aligned, reach by the induced indicia wheel speed of checking colors simultaneously and measure, synchronously compare, and judge the multiple action of color initial time and order.
It should be noted that, above-mentioned colour wheel synchronisation control means only illustrates the synchronisation control means of two colour wheels, the in the situation that of needs highlight illumination, in the time using multiple sets of light sources, can use multiple colour wheels or organize double-colored wheel construction more, the colour wheel synchronisation control means that the embodiment of the present invention provides is suitable for too.
Those skilled in the art should understand, embodiments of the invention can be provided as method, system or computer program. Therefore, the present invention can adopt complete hardware implementation example, completely implement software example or the form in conjunction with the embodiment of software and hardware aspect. And the present invention can adopt the form at one or more upper computer programs of implementing of computer-usable storage medium (including but not limited to magnetic disc store and optical memory etc.) that wherein include computer usable program code.
The present invention is with reference to describing according to flow chart and/or the block diagram of the method for the embodiment of the present invention, equipment (system) and computer program. Should understand can be by the flow process in each flow process in computer program instructions realization flow figure and/or block diagram and/or square frame and flow chart and/or block diagram and/or the combination of square frame. Can provide these computer program instructions to the processor of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing device to produce a machine, the instruction that makes to carry out by the processor of computer or other programmable data processing device produces the device for realizing the function of specifying at flow process of flow chart or multiple flow process and/or square frame of block diagram or multiple square frame.
These computer program instructions also can be stored in energy vectoring computer or the computer-readable memory of other programmable data processing device with ad hoc fashion work, the instruction that makes to be stored in this computer-readable memory produces the manufacture that comprises command device, and this command device is realized the function of specifying in flow process of flow chart or multiple flow process and/or square frame of block diagram or multiple square frame.
These computer program instructions also can be loaded in computer or other programmable data processing device, make to carry out sequence of operations step to produce computer implemented processing on computer or other programmable devices, thereby the instruction of carrying out is provided for realizing the step of the function of specifying in flow process of flow chart or multiple flow process and/or square frame of block diagram or multiple square frame on computer or other programmable devices.
Obviously, those skilled in the art can carry out various changes and modification and not depart from the spirit and scope of the present invention the present invention. Like this, if these amendments of the present invention and within modification belongs to the scope of the claims in the present invention and equivalent technologies thereof, the present invention is also intended to comprise these changes and modification interior.
Claims (10)
1. the double-colored synchronisation control means of taking turns of light source, is characterized in that,
In a swing circle, carry out synchronous for the first time according to inductive impulse signal to the first colour wheel and described the second colour wheel;
After synchronous for the first time described in obtaining, by the beam brightness signal of the second colour wheel output;
Carry out synchronous for the second time according to described beam brightness signal to described the first colour wheel and the second colour wheel.
2. method according to claim 1, is characterized in that,
Described in a swing circle, according to inductive impulse signal, the first colour wheel and described the second colour wheel are carried out synchronously specifically comprising for the first time:
In a swing circle,
Obtain respectively corresponding described the first colour wheel, the first inductive impulse signal of the second colour wheel, the second inductive impulse signal, described the first inductive impulse signal and the second inductive impulse signal are synchronizeed with the swing circle of described the first colour wheel and the second colour wheel respectively,
Adjust the rotating speed of the first colour wheel or the second colour wheel, make described the first inductive impulse signal and the second inductive impulse signal synchronous.
3. method according to claim 1, is characterized in that, describedly according to described beam brightness signal, described the first colour wheel and the second colour wheel is carried out synchronously specifically comprising for the second time:
The brightness of obtaining in described beam brightness signal changes bound-time threshold value,
Adjust the rotating speed of the first colour wheel or the second colour wheel, making described brightness change bound-time threshold value is 0.
4. method according to claim 3, is characterized in that, described in obtain brightness in described beam brightness signal and change bound-time threshold value and specifically comprise:
In a beam brightness period of change, to obtain in light source three primary colours or four primary colours, the brightness of one of them primary colours changes bound-time threshold value.
5. method according to claim 3, is characterized in that, the rotating speed of described adjustment the first colour wheel or the second colour wheel, and making described brightness change bound-time threshold value is 0 specifically to comprise:
Determine that according to the rotating speed of described the first colour wheel or the second colour wheel and described brightness variation bound-time threshold value the circumferential length between two colour wheels is poor,
Taking one of them rotating speed of described the first colour wheel and the second colour wheel as benchmark, and poor according to described circumferential length, change wherein another rotating speed, until changing bound-time threshold value, described brightness becomes 0.
6. method according to claim 4, is characterized in that, the rotating speed of described adjustment the first colour wheel or the second colour wheel, and making described brightness change bound-time threshold value is also to comprise after 0:
The rotating speed of adjusting described the first colour wheel or the second colour wheel makes the synchronized rotation of two colour wheels.
7. method according to claim 2, the rotating speed of described adjustment the first colour wheel or the second colour wheel, synchronously specifically comprises described the first inductive impulse signal and the second inductive impulse signal:
Relatively rising edge or the trailing edge difference of the first inductive impulse signal and brightness variable signal described in synchronization,
Adjust the rotating speed of described the first colour wheel or the second colour wheel, the rising edge of described the first inductive impulse signal and the second inductive impulse signal or trailing edge are overlapped.
8. according to the arbitrary described method of claim 1-7, it is characterized in that,
Described beam brightness signal is converted to voltage signal by AD;
One-period voltage signal comprises multiple different magnitudes of voltage, the brightness of the primary colours that described different magnitudes of voltage correspondence is different.
9. method according to claim 1, is characterized in that, described the first colour wheel is fluorescent wheel, and described the second colour wheel is filter wheel.
10. method according to claim 9, is characterized in that, described the first inductive impulse signal and the second inductive impulse signal obtain according to the sync mark on described the first colour wheel and the second colour wheel respectively.
Priority Applications (2)
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| CN201711107759.XA CN107991834B (en) | 2015-11-04 | 2016-03-02 | Double-color wheel synchronous control method of light source |
| CN201610115865.1A CN105607401B (en) | 2015-11-04 | 2016-03-02 | The double-colored wheel synchronisation control means of light source |
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| CN201510739594 | 2015-11-04 | ||
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| CN201610115865.1A CN105607401B (en) | 2015-11-04 | 2016-03-02 | The double-colored wheel synchronisation control means of light source |
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| CN201610115887.8A Active CN105824178B (en) | 2015-11-04 | 2016-03-02 | The double-colored wheel synchronisation control means of light source |
| CN201711107759.XA Active CN107991834B (en) | 2015-11-04 | 2016-03-02 | Double-color wheel synchronous control method of light source |
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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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Also Published As
| Publication number | Publication date |
|---|---|
| CN105824178B (en) | 2017-12-15 |
| CN105607401B (en) | 2017-10-24 |
| CN107991834B (en) | 2020-05-15 |
| CN105759547A (en) | 2016-07-13 |
| CN105759547B (en) | 2017-10-24 |
| CN107991834A (en) | 2018-05-04 |
| CN105824178A (en) | 2016-08-03 |
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Effective date of registration: 20200821 Address after: 266555 Qian WAN port road, Huangdao District, Qingdao, Shandong Province, No. 218 Patentee after: Qingdao Hisense Laser Display Co.,Ltd. Address before: 266100 Zhuzhou Road, Laoshan District, Shandong, No. 151, No. Patentee before: HISENSE Co.,Ltd. |