CN105549310B - A kind of many colour wheel synchronous method and laser projection device - Google Patents

A kind of many colour wheel synchronous method and laser projection device Download PDF

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Publication number
CN105549310B
CN105549310B CN201510919831.3A CN201510919831A CN105549310B CN 105549310 B CN105549310 B CN 105549310B CN 201510919831 A CN201510919831 A CN 201510919831A CN 105549310 B CN105549310 B CN 105549310B
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sensor
colour wheel
area
group
detection light
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CN105549310A (en
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崔荣荣
李健锋
郭大勃
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Qingdao Hisense Laser Display Co Ltd
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Hisense Group Co Ltd
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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
    • 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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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Optics & Photonics (AREA)
  • Projection Apparatus (AREA)

Abstract

The invention discloses a kind of many colour wheel synchronous method and laser projection device, the first area in the wheel face of the first colour wheel is detected by first group of sensor, and the first level skip signal is produced when each swing circle of the first colour wheel detects the first area for the first time；The second area in the wheel face of the second colour wheel is detected by second group sensor, and second electrical level skip signal is produced when each swing circle of the second colour wheel detects the second area for the first time；Whether the time difference for judging the first level skip signal and the second electrical level skip signal is threshold value, if not, then adjust the rotating speed of first colour wheel and/or second colour wheel so that the time difference of the first level skip signal and the second electrical level skip signal is the threshold value.

Description

A kind of many colour wheel synchronous method and laser projection device
Technical field
The present invention relates to many colour wheel synchronous method and laser projection of display technology field, more particularly to a kind of LASER Light Source Device.
Background technology
At present, projecting apparatus is widely used in the various application scenarios such as film broadcasting, meeting and publicity.It is well known that In the light source of projecting apparatus, through providing sequence of colored lights frequently with fluorescent material wheel.Wherein, by not homochromy section of fluorescent material wheel in turn And be periodically arranged on the propagation path of exciting light, and then using exciting light come glimmering on not homochromy section of excitated fluorescent powder wheel Luminescent material, to produce the fluorescence without color.However, because the spectral region produced by fluorescent material is wider so that part is glimmering The excitation of light is not enough, and then causes the colour gamut of light source not big enough.In this case, generally require by optical filter come to glimmering Light is filtered, to improve the excitation of fluorescence.However, because the spectral region of the fluorescence of different colours partly overlaps, it is impossible to Filtered using same optical filter, it is therefore desirable to provide different optical filters for the fluorescence of different colours.In prior art In, can by multiple filter sets that can filter different colours into filter wheel, and with fluorescent material wheel synchronous rotary, so as to obtain picture Matter is clear, the picture of bright colors.Above-mentioned framework is commonly referred to as double-colored wheel light source framework.
In double-colored wheel light source framework, it is most important that it is required that fluorescent material wheel and filter wheel synchronous rotary.If glimmering Rotate asynchronous between light powder wheel and filter wheel, the phenomenon such as fuzzy pictures, color confusion obtained can be caused.A kind of implementation In, double-colored wheel is used into coaxial design, but this design requires high for assembly precision, once producing error causes the colour mixture time Duan Wufa is corrected again, and colour mixture section can only be rejected by rear end and ensures the purity that color is exported, this also results in the loss of light-source brightness. In a kind of implementation, double-colored wheel is using separating in non-coaxial design, the technology, and the motor shaft of fluorescent material wheel and filter wheel divides Not independent rotation.In order that obtaining fluorescent material wheel and filter wheel synchronous rotary, motor shaft that can be in fluorescent material wheel and colour filter One MARK tag block is set respectively on the motor shaft surface of wheel, usually black belt, set with absorption effects, and correspondingly Sensor is put, sends situation that detection light absorbed and reflected by MARK tag blocks to form oscillogram, and foundation by sensor Oscillogram judges the synchronization extent of two colour wheels.But this setup, one side black belt is to stick to motor shaft surface , and colour wheel environment temperature is higher, black belt is chronically under hot environment as organic matter easily to come off, and results in the need for tearing open Unload product and carry out maintenance replacing, on the other hand, the position that black belt may also be with setting when pasting, such as color subregion circle There is error at line, be generally also required to take some debugging methods further to reduce due to assembling when software detection is to error The error caused.
Accordingly, it is desirable to provide a kind of many colour wheel synchronous method of LASER Light Source, it is possible to increase many colour wheels synchronous efficiency and essence Degree.
The content of the invention
The embodiment of the present invention provides a kind of many colour wheel synchronous method and laser projection device, how easy, fast to solve The problem of realizing the precise synchronization of many colour wheels of victory.
The embodiment of the present invention provides a kind of many colour wheel synchronous method, and this method includes：
The first area in the wheel face of the first colour wheel is detected by first group of sensor, and in each rotation of the first colour wheel Cycle produces the first level skip signal when detecting the first area for the first time；
The second area in the wheel face of the second colour wheel is detected by second group sensor, and in each rotation of the second colour wheel Cycle produces second electrical level skip signal when detecting the second area for the first time；
Whether the time difference for judging the first level skip signal and the second electrical level skip signal is threshold value, if It is no, then adjust the rotating speed of first colour wheel and/or second colour wheel so that the first level skip signal and described the The time difference of two level skip signals is the threshold value.
Optionally, the first area is the transparent region in first colour wheel so that the first group of sensor hair The detection light penetrated is when each swing circle of the first colour wheel detects the first area for the first time, the first group of sensor The detection light of transmitting is received through the first area and by the first group of sensor, produces the first level saltus step letter Number；Or, the first area is aluminium base area so that the detection light of the first group of sensor transmitting is in the every of the first colour wheel When individual swing circle detects the first area for the first time, the detection light of the first group of sensor transmitting is by firstth area Domain is reflected and received by the first group of sensor, produces the first level skip signal；
The second area is the transparent region in second colour wheel so that the detection of the second group sensor transmitting Light is when each swing circle of the second colour wheel detects the second area for the first time, the spy of the second group sensor transmitting Light-metering is received through the second area and by the second group sensor, produces the second electrical level skip signal；Or, institute It is the filtered region in second colour wheel to state second area, and the surface of the filtered region covers one layer of reflecting coating, is used for Reflect the detection light of the second group sensor transmitting so that the detection light of the second group sensor transmitting is in the second colour wheel When each swing circle detects the second area for the first time, the detection light of the second group sensor transmitting is by described second Region is reflected and received by the second group sensor, produces the second electrical level skip signal；
Wherein, the transparent region in the transparent region or second colour wheel in first colour wheel is by clear glass system Into, or be made up of transparent diffuser panel material.
Optionally, the first area detected by first group of sensor in the first colour wheel, and in the every of the first colour wheel Individual swing circle produces the first level skip signal when detecting the first area for the first time, including：
The first group of sensor includes the first emission sensor and first and receives sensor, first emission sensor Positioned at the first face of first colour wheel, for emission detection light；Described first, which receives sensor, is located at first colour wheel In the light path of second face and the detection light launched positioned at first emission sensor；
The detection light of the first emission sensor transmitting detects institute for the first time in each swing circle of the first colour wheel When stating first area, the detection light is through the first area and receives sensor by described first and receives, and produces described the One level skip signal.
Optionally, the first area detected by first group of sensor in the first colour wheel, and in the every of the first colour wheel Individual swing circle produces the first level skip signal when detecting the first area for the first time, including：
The first group of sensor includes the first emission sensor and first and receives sensor, first emission sensor Positioned at the first face of first colour wheel, for emission detection light；Described first, which receives sensor, is located at first colour wheel In the light path of second face and the detection light launched positioned at first emission sensor；
The detection light of the first emission sensor transmitting detects institute for the first time in each swing circle of the first colour wheel When stating first area, the detection light of the first emission sensor transmitting is reflected, and produces the first level skip signal.
Optionally, the first area detected by first group of sensor in the first colour wheel, and in the every of the first colour wheel Individual swing circle produces the first level skip signal when detecting the first area for the first time, including：
The first group of sensor includes the first sending and receiving sensor, and first sending and receiving sensor is used for emission detection light, And the light path of the detection light of the first sending and receiving sensor transmitting is vertical with the one side of first colour wheel；
The detection light that sensor emission is penetrated in first transmitting-receiving is detected for the first time in each swing circle of the first colour wheel During the first area, the detection light passes through the first area, produces the first level skip signal.
Optionally, the first area detected by first group of sensor in the first colour wheel, and in the every of the first colour wheel Individual swing circle produces the first level skip signal when detecting the first area for the first time, including：
The first group of sensor includes the first sending and receiving sensor, and first sending and receiving sensor is used for emission detection light, And the light path of the detection light of the first sending and receiving sensor transmitting is vertical with the one side of first colour wheel；
The detection light that sensor emission is penetrated in first transmitting-receiving is detected for the first time in each swing circle of the first colour wheel The reflected light formed during the first area is received by first sending and receiving sensor, produces the first level skip signal.
Optionally, the second area in the second colour wheel is detected by second group sensor, and in each rotation of the second colour wheel The turn-week phase produces second electrical level skip signal when detecting the second area for the first time, including：
The second group sensor includes the second emission sensor and second and receives sensor, second emission sensor Positioned at the first face of second colour wheel, for emission detection light；Described second, which receives sensor, is located at second colour wheel In the light path of second face and the detection light launched positioned at second emission sensor；
The detection light of the second emission sensor transmitting detects institute for the first time in each swing circle of the second colour wheel When stating second area, the detection light is through the second area and receives sensor by described second and receives, and produces described the Two level skip signals.
Optionally, the second area in the second colour wheel is detected by second group sensor, and in each rotation of the second colour wheel The turn-week phase produces second electrical level skip signal when detecting the second area for the first time, including：
The second group sensor includes the second emission sensor and second and receives sensor, second emission sensor Positioned at the first face of second colour wheel, for emission detection light；Described second, which receives sensor, is located at second colour wheel In the light path of second face and the detection light launched positioned at second emission sensor；
The detection light of the second emission sensor transmitting detects institute for the first time in each swing circle of the second colour wheel When stating second area, the detection light of the second emission sensor transmitting is reflected, and produces the second electrical level skip signal.
Optionally, the second area in the second colour wheel is detected by second group sensor, and in each rotation of the second colour wheel The turn-week phase produces second electrical level skip signal when detecting the second area for the first time, including：
The second group sensor includes the second sending and receiving sensor, and second sending and receiving sensor is used for emission detection light, And the light path of the detection light of the second sending and receiving sensor transmitting is vertical with the one side of second colour wheel；
The detection light that sensor emission is penetrated in second transmitting-receiving is detected for the first time in each swing circle of the second colour wheel During the second area, the detection light passes through the second area, produces the second electrical level skip signal.
Optionally, the second area in the second colour wheel is detected by second group sensor, and in each rotation of the second colour wheel The turn-week phase produces second electrical level skip signal when detecting the second area for the first time, including：
The second group sensor includes the second sending and receiving sensor, and second sending and receiving sensor is used for emission detection light, And the light path of the detection light of the second sending and receiving sensor transmitting is vertical with the one side of second colour wheel；
The detection light of the second sending and receiving sensor transmitting detects institute for the first time in each swing circle of the second colour wheel State the reflected light formed during second area to be received by second sending and receiving sensor, produce the second electrical level skip signal.
The embodiment of the present invention provides a kind of laser projection device, including：
First group of sensor, the first area in wheel face for detecting the first colour wheel, and in each rotation of the first colour wheel The turn-week phase produces the first level skip signal when detecting the first area for the first time；
Second group sensor, the second area in wheel face for detecting the second colour wheel, and in each rotation of the second colour wheel The turn-week phase produces second electrical level skip signal when detecting the second area for the first time；
Control unit, for judging that the time difference of the first level skip signal and the second electrical level skip signal is No is threshold value, if it is not, then adjusting the rotating speed of first colour wheel and/or second colour wheel so that the first level saltus step The time difference of signal and the second electrical level skip signal is the threshold value.
Optionally, the first area is the transparent region in first colour wheel so that the first group of sensor hair The detection light penetrated is when each swing circle of the first colour wheel detects the first area for the first time, the first group of sensor The detection light of transmitting is received through the first area and by the first group of sensor, produces the first level saltus step letter Number；Or, the first area is aluminium base area so that the detection light of the first group of sensor transmitting is in the every of the first colour wheel When individual swing circle detects the first area for the first time, the detection light of the first group of sensor transmitting is by firstth area Domain is reflected and received by the first group of sensor, produces the first level skip signal；
The second area is the transparent region in second colour wheel so that the detection of the second group sensor transmitting Light is when each swing circle of the second colour wheel detects the second area for the first time, the spy of the second group sensor transmitting Light-metering is received through the second area and by the second group sensor, produces the second electrical level skip signal；Or, institute It is the filtered region in second colour wheel to state second area, and the surface of the filtered region covers one layer of reflecting coating, is used for Reflect the detection light of the second group sensor transmitting so that the detection light of the second group sensor transmitting is in the second colour wheel When each swing circle detects the second area for the first time, the detection light of the second group sensor transmitting is by described second Region is reflected and received by the second group sensor, produces the second electrical level skip signal；
Wherein, the transparent region in the transparent region or second colour wheel in first colour wheel is by clear glass system Into, or be made up of transparent diffuser panel material.
Optionally, the first group of sensor includes the first emission sensor and first receives sensor, first hair The first face that sensor is located at first colour wheel is penetrated, for emission detection light；Described first, which receives sensor, is located at described the In the light path of second face of color wheel and the detection light launched positioned at first emission sensor；
The detection light of the first emission sensor transmitting detects institute for the first time in each swing circle of the first colour wheel When stating first area, the detection light is through the first area and receives sensor by described first and receives, and produces described the One level skip signal.
Optionally, the first group of sensor includes the first emission sensor and first receives sensor, first hair The first face that sensor is located at first colour wheel is penetrated, for emission detection light；Described first, which receives sensor, is located at described the In the light path of second face of color wheel and the detection light launched positioned at first emission sensor；
The detection light of the first emission sensor transmitting detects institute for the first time in each swing circle of the first colour wheel When stating first area, the detection light of the first emission sensor transmitting is reflected, and produces the first level skip signal.
Optionally, the first group of sensor includes the first sending and receiving sensor, and first sending and receiving sensor is used to launch Light is detected, and the light path of the detection light of first sending and receiving sensor transmitting is vertical with the one side of first colour wheel；
The detection light that sensor emission is penetrated in first transmitting-receiving is detected for the first time in each swing circle of the first colour wheel During the first area, the detection light passes through the first area, produces the first level skip signal.
Optionally, the first group of sensor includes the first sending and receiving sensor, and first sending and receiving sensor is used to launch Light is detected, and the light path of the detection light of first sending and receiving sensor transmitting is vertical with the one side of first colour wheel；
The detection light that sensor emission is penetrated in first transmitting-receiving is detected for the first time in each swing circle of the first colour wheel The reflected light formed during the first area is received by first sending and receiving sensor, produces the first level skip signal.
Optionally, the second group sensor includes the second emission sensor and second receives sensor, second hair The first face that sensor is located at second colour wheel is penetrated, for emission detection light；Described second, which receives sensor, is located at described the In the light path of second face of two colour wheels and the detection light launched positioned at second emission sensor；
The detection light of the second emission sensor transmitting detects institute for the first time in each swing circle of the second colour wheel When stating second area, the detection light is through the second area and receives sensor by described second and receives, and produces described the Two level skip signals.
Optionally, the second group sensor includes the second emission sensor and second receives sensor, second hair The first face that sensor is located at second colour wheel is penetrated, for emission detection light；Described second, which receives sensor, is located at described the In the light path of second face of two colour wheels and the detection light launched positioned at second emission sensor；
The detection light of the second emission sensor transmitting detects institute for the first time in each swing circle of the second colour wheel When stating second area, the detection light of the second emission sensor transmitting is reflected, and produces the second electrical level skip signal.
Optionally, the second group sensor includes the second sending and receiving sensor, and second sending and receiving sensor is used to launch Light is detected, and the light path of the detection light of second sending and receiving sensor transmitting is vertical with the one side of second colour wheel；
The detection light that sensor emission is penetrated in second transmitting-receiving is detected for the first time in each swing circle of the second colour wheel During the second area, the detection light passes through the second area, produces the second electrical level skip signal.
Optionally, the second group sensor includes the second sending and receiving sensor, and second sending and receiving sensor is used to launch Light is detected, and the light path of the detection light of second sending and receiving sensor transmitting is vertical with the one side of second colour wheel；
The detection light of the second sending and receiving sensor transmitting detects institute for the first time in each swing circle of the second colour wheel State the reflected light formed during second area to be received by second sending and receiving sensor, produce the second electrical level skip signal.
The method provided according to embodiments of the present invention, first group of sensor is produced when detecting the first area in the first colour wheel Raw first level skip signal, second group sensor produces second electrical level saltus step letter when detecting the second area in the second colour wheel Number, if it is determined that the time difference between the first level skip signal and second electrical level skip signal is not threshold value, then can determine Rotation between first colour wheel and the second colour wheel is asynchronous, so as to according to the time difference adjust first colour wheel and/ Or the rotating speed of second colour wheel so that the time difference of the first level skip signal and the second electrical level skip signal is The threshold value, so that the rotation between the first colour wheel and the second colour wheel is synchronous.Method provided in an embodiment of the present invention is direct First and second colour wheel wheel face regions are detected using sensor, it is not necessary to which extra increase label is recognized as sensor Mark, method is easy directly, and reliability is high, improves the synchronous efficiency of double-colored wheel, it is thus possible to effectively realize each color of light Accurate switching, realize the accurate synchronization of double-colored wheel, colour mixture light or colour mixture period do not produced.This is because, compared to existing Paste black light-absorbing adhesive tape to make marks in color wheel motor rotating shaft in technology, can avoid assembling the error that reason is caused, shorten The process of debugging, and cause the problem of product reliability is low in the absence of the risk that mark comes off.Meanwhile, relative to coaxially setting The many colour wheel synchronization scenarios put, it is not necessary to carry out rejecting the colour mixture period ensureing the purity of color, so as to improve light source Output brightness, make the image color configuration more accurate, saturation degree of whole laser projection system output higher.
Brief description of the drawings
Technical scheme in order to illustrate the embodiments of the present invention more clearly, makes required in being described below to embodiment Accompanying drawing is briefly introduced, it should be apparent that, drawings in the following description are only some embodiments of the present invention, for this For the those of ordinary skill in field, without having to pay creative labor, it can also be obtained according to these accompanying drawings His accompanying drawing.
Fig. 1 provides a kind of many colour wheel synchronous method schematic flow sheets for the embodiment of the present invention；
Fig. 2 is a kind of first colour wheel schematic diagram provided in an embodiment of the present invention；
Fig. 3 is a kind of second colour wheel schematic diagram provided in an embodiment of the present invention；
Fig. 4 is a kind of corresponding relation schematic diagram of first colour wheel and the second colour wheel provided in an embodiment of the present invention；
Fig. 5 is another first colour wheel schematic diagram provided in an embodiment of the present invention；
Fig. 6 is another second colour wheel schematic diagram provided in an embodiment of the present invention；
Fig. 7 is the corresponding relation schematic diagram of another first colour wheel and the second colour wheel provided in an embodiment of the present invention；
Fig. 8 is a kind of level skip signal schematic diagram provided in an embodiment of the present invention；
Fig. 9 is a kind of level skip signal schematic diagram provided in an embodiment of the present invention；
Figure 10 is a kind of level skip signal schematic diagram provided in an embodiment of the present invention；
Figure 11 is a kind of level skip signal schematic diagram provided in an embodiment of the present invention；
Figure 12 is a kind of level skip signal schematic diagram provided in an embodiment of the present invention；
Figure 13 is a kind of level skip signal schematic diagram provided in an embodiment of the present invention；
Figure 14 is a kind of level skip signal schematic diagram provided in an embodiment of the present invention；
Figure 15 is a kind of level skip signal schematic diagram provided in an embodiment of the present invention；
Figure 16 is a kind of laser projection device structural representation provided in an embodiment of the present invention.
Embodiment
In order that the object, technical solutions and advantages of the present invention are clearer, below in conjunction with accompanying drawing the present invention is made into One step it is described in detail, it is clear that described embodiment is only embodiment of the invention a part of, rather than whole implementation Example.Based on the embodiment in the present invention, what those of ordinary skill in the art were obtained under the premise of creative work is not made All other embodiment, belongs to the scope of protection of the invention.
The embodiment of the present invention provides a kind of colour wheel synchronous method of LASER Light Source and can apply to the projection arrangements such as projecting apparatus In.
As shown in figure 1, providing a kind of many colour wheel synchronous method schematic flow sheets for the embodiment of the present invention.
Referring to Fig. 1, this method includes：
Step 101：The first area in the wheel face of the first colour wheel is detected by first group of sensor, and in the first colour wheel Each swing circle produces the first level skip signal when detecting the first area for the first time；Visited by second group sensor The second area surveyed in the wheel face of the second colour wheel, and detect secondth area for the first time in each swing circle of the second colour wheel Second electrical level skip signal is produced during domain；
Step 102：Judge the first level skip signal and the second electrical level skip signal time difference whether be Threshold value, if it is not, then adjusting the rotating speed of first colour wheel and/or second colour wheel so that the first level skip signal Time difference with the second electrical level skip signal is the threshold value.
In step 101, the first colour wheel can be converted to the laser that LASER Light Source is launched the light of different wave length, after conversion Light enters in the light path of the second colour wheel.First colour wheel is arranged on the laser optical path for exciting light emitting source to send, and the first colour wheel is excited Light is excited, changed and transmission laser.Second colour wheel and the first colour wheel are corresponding, and same color central angle size is identical, to incite somebody to action The light of first colour wheel conversion is filtered, with the excitation for the light for improving the conversion of the first colour wheel.Second colour wheel is normally at first The light emission side of colour wheel stimulated luminescence is simultaneously intervally arranged with the first colour wheel.
In the embodiment of the present invention, the first colour wheel can be fluorescent material wheel.Can be to include when first colour wheel is fluorescent material wheel Fluorescent material area, aluminium base area, the wheel disc of transparent region.Aluminium base area on fluorescent material wheel is the region of uncoated fluorescent material, aluminium The surface of substrate zone is minute surface, can reflect infrared acquisition light or ultraviolet detection light.Transparent region on fluorescent material wheel is sharp Transmitance region, the laser that can be launched with transmission laser light source.Excircle of the fluorescent material area along the aluminium base area in fluorescent material wheel Set.When fluorescent material wheel rotates, laser gets to fluorescent material area and transparent region successively, such laser can from transparent region outgoing, Correspondingly, first group of sensor corresponding with fluorescent material wheel should not be radiated at same position with laser, but be radiated at transmission area The diverse location in domain.
Second colour wheel can be filter wheel.Can be to include transparent region, filtered region when second colour wheel is filter wheel The wheel disc of (one or more in green glow filtered region, feux rouges filtered region, blue light filtered region can be included).Wherein, thoroughly Area pellucida domain is laser transmission area.Green glow filtered region only passes through green glow, and the light of other colors all reflects；Feux rouges filtered region is only Through feux rouges, the light of other colors all reflects；Blue light filtered region is transparent region, only passes through blue light.Optionally, second Filtered region in colour wheel covers one layer of reflecting coating, the detection light that can launch with reflective sensor.
Meanwhile, in the embodiment of the present invention, first area can be the transparent region in the first colour wheel so that described first group The detection light of sensor emission is when each swing circle of the first colour wheel detects the first area for the first time, and described first The detection light of group sensor emission is received through the first area and by the first group of sensor, produces first level Skip signal.Transparent region in first colour wheel can be made up of clear glass, or be made up of transparent diffuser panel material.
Accordingly, second area can be the transparent region in the second colour wheel so that the second group sensor transmitting Detection light is when each swing circle of the second colour wheel detects the second area for the first time, the second group sensor transmitting Detection light through the second area and being received by the second group sensor, produce the second electrical level skip signal.Together Sample, the transparent region in the second colour wheel can be made up of clear glass, or be made up of transparent diffuser panel material.
For example, the laser of LASER Light Source transmitting is blue laser, and the first colour wheel is fluorescent material wheel, now fluorescent material wheel It can be device as shown in Figure 2.As shown in Fig. 2 being a kind of first colour wheel schematic diagram provided in an embodiment of the present invention.In Fig. 2, 31 represent transparent region, are laser transmission area；Fluorescent material area is distributed in the excircle in aluminium base area 32.Can be with fluorescent material area Including yellow fluorescent powder area 321 and green emitting phosphor area 322.LASER Light Source transmitting is refiltered from yellow fluorescent powder area 321 Laser can obtain red fluorescence, and (because the red efficiency that current red fluorescence material is inspired is relatively low, the conversion of feux rouges is to pass through Blue laser excites yellow fluorescent material to send gold-tinted, then obtains feux rouges, therefore yellow fluorescent powder area 321 by filter wheel filtering It is considered as feux rouges transition zone), the laser of LASER Light Source transmitting is refiltered from green emitting phosphor area 322 can obtain green glimmering Light.Can certainly be the feelings that two-color laser (being usually blueness and red laser) excites a kind of fluorescent material (green emitting phosphor) Condition, ultimately forms three primary colours light.
With reference to Fig. 2, as shown in figure 3, being a kind of second colour wheel schematic diagram provided in an embodiment of the present invention.In Fig. 3, the second color Take turns as filter wheel.Filter wheel in Fig. 3 can be filter wheel corresponding with the fluorescent material wheel in Fig. 2.Filter wheel is usually fan-shaped Structures to form is formed.In Fig. 3,41 can represent transparent region, be laser transmission area；42 can represent green glow filtered region；43 Feux rouges filtered region can be represented.
With reference to Fig. 2 and Fig. 3, as shown in figure 4, being a kind of pair of first colour wheel and the second colour wheel provided in an embodiment of the present invention Answer relation schematic diagram.Each region in the fluorescent material wheel in Fig. 2 and each area in the filter wheel in Fig. 3 are shown in Fig. 4 The corresponding relation in domain.Do not consider that a part of yellow fluorescence in Tu2Zhong yellow fluorescent powders area 321 is retained to form four primary When, the fluorescent material wheel in Fig. 2 should align with the female middle color partition boundaries line of the colour filter in Fig. 3 under synchronous regime.I.e. Transparent region 31 in Fig. 2 is correspondingly arranged with the transparent region 41 in Fig. 3, in yellow fluorescent powder area 321 and Fig. 3 in Fig. 2 Feux rouges filtered region 43 is correspondingly arranged, and the green emitting phosphor area 322 in Fig. 2 is correspondingly arranged with the green glow filtered region 42 in Fig. 3, So that the filter area of same color and the fluorescent material area of same color are just right, the three of whole light-source system output are just can guarantee that Primary colours monochromatic light, the situation of no mixed light, to improve the excitation for being output to three primary colours light in ray machine optical projection system.
For example, as shown in figure 5, being another first colour wheel schematic diagram provided in an embodiment of the present invention.In Fig. 5 Color wheel is fluorescent material wheel.In fluorescent material wheel in Fig. 5, transparent region 51 can be that region is constituted at symmetrical two.Accordingly , 52 represent aluminium base area.Yellow fluorescent powder area 521 and green emitting phosphor area 522 can be included in fluorescent material area.Yellow fluorescence Powder area 521 can be that region is constituted at symmetrical two；Green emitting phosphor area 522 can be that region is constituted at symmetrical two. And for first group of sensor, two the first level skip signals may will be formed, only determine one of them first level Skip signal.
With reference to Fig. 5, as shown in fig. 6, being another second colour wheel schematic diagram provided in an embodiment of the present invention.In Fig. 6, second Colour wheel is filter wheel.Filter wheel in Fig. 6 can be filter wheel corresponding with the fluorescent material wheel in Fig. 5.In Fig. 6,61 can be with table Show transparent region, region is constituted at symmetrical two；62 can represent green glow filtered region, and region is constituted at symmetrical two； 63 can represent feux rouges filtered region, and region is constituted at symmetrical two.And for second group sensor, will may be formed Two second electrical level skip signals, only determine one of second electrical level skip signal.
With reference to Fig. 5 and Fig. 6, as shown in fig. 7, being another first colour wheel and the second colour wheel provided in an embodiment of the present invention Corresponding relation schematic diagram.Shown in Fig. 7 each region in the fluorescent material wheel in Fig. 5 with it is each in the filter wheel in Fig. 6 The corresponding relation in region.The specific description that may be referred in Fig. 5 and Fig. 6, will not be repeated here.
It should be noted that Fig. 2 to Fig. 7 is an example in the embodiment of the present invention.If LASER Light Source transmitting Laser is the laser of other colors, and the first colour wheel is also required to corresponding change to the composition of the second colour wheel, will not be repeated here.
It should be noted that in the embodiment of the present invention, there may be multiple monochromatic laser light sources, in order to obtain remaining two base Coloured light, then each LASER Light Source need first colour wheel to change.Meanwhile, multiple first colour wheels of whole laser source system It is required for and a second colour wheel synchronous rotary.For example, there can be N number of blue laser light source in the embodiment of the present invention, it is right N number of fluorescent material wheel is answered, while this N number of fluorescent material wheel and a filter wheel are required for synchronous rotary, so as to obtain laser projection system Three primary colours light required for system, N is positive integer.
In the embodiment of the present invention, the first area in the first colour wheel can be corresponding with the second area in the second colour wheel Region, or with the corresponding area in region in addition to region corresponding with the second area in the second colour wheel in the first colour wheel Domain.
For example, second area is the transparent region in the second colour wheel.Now, first area can be in the first colour wheel Transparent region, i.e., region corresponding with the transparent region in the second colour wheel.First area can also be the first colour wheel in except All regions beyond transparent region.With reference to Fig. 2, now first area can be aluminium base area 32.
Accordingly, the second area in the second colour wheel can be region corresponding with the first area in the first colour wheel, Can be and the corresponding region in region in addition to region corresponding with the first area in the first colour wheel in the second colour wheel.
For example, first area is the transparent region in the first colour wheel.Now, second area can be in the second colour wheel Transparent region, i.e., region corresponding with the transparent region in the first colour wheel.Second area can also be the second colour wheel in except All regions beyond transparent region.With reference to Fig. 3, now second area can be green glow filtered region 42 and feux rouges filtered region 43 united regions.
In summary, in the embodiment of the present invention, first area and second area can have following four combining form：
1st, first area is the transparent region in the first colour wheel；Second area is the transparent region in the second colour wheel.
2nd, first area is the transparent region in the first colour wheel；Second area be the second colour wheel in addition to transparent region All regions, i.e. filtered region.
3rd, first area is the aluminium base area of uncoated fluorescent material in the first colour wheel；Second area is saturating in the second colour wheel Area pellucida domain.
4th, first area is the aluminium base area of uncoated fluorescent material in the first colour wheel；Second area be the second colour wheel in except All regions beyond transparent region, i.e. filtered region.
If it should be noted that first area is the transparent region in the first colour wheel, first group of sensor may be caused to send out The detection light penetrated is when each swing circle of the first colour wheel detects the first area for the first time, the first group of sensor The detection light of transmitting is received through the first area and by the first group of sensor, produces the first level saltus step letter Number.If first area is the aluminium base area in the first colour wheel, the detection light of first group of sensor transmitting may be caused the When each swing circle of color wheel detects the first area for the first time, the detection light quilt of the first group of sensor transmitting The first area is reflected and received by the first group of sensor, produces the first level skip signal.
If second area is the transparent region in the second colour wheel, the detection light that second group sensor is launched may be caused the When each swing circle of two colour wheels detects the second area for the first time, the detection light of the second group sensor transmitting is worn Cross the second area and received by the second group sensor, produce the second electrical level skip signal.If second area is The filtered region of one layer of reflecting coating is covered in second colour wheel, the detection light of the second group sensor transmitting may be caused When each swing circle of the second colour wheel detects the second area for the first time, the detection of the second group sensor transmitting Light is reflected and received by the second group sensor by the second area, produces the second electrical level skip signal.
Optionally, all regions in the second colour wheel in addition to transparent region can be the area of one floor reflecting coating of covering Domain.Reflecting coating is used for the detection light of reflective sensor (can be first group of sensor or second group sensor) transmitting.Example Such as, first group of sensor or second group sensor transmitting detection light be ultraviolet light, then can in the second colour wheel except The reflecting coating of one layer of light reflection ultraviolet is covered on all regions beyond transparent region, so as to reflect first group of sensor Or the ultraviolet light of second group sensor transmitting.For another example first group of sensor or the detection light of second group sensor transmitting For infrared light, then can one layer of reflection infrared light of covering on all regions in the second colour wheel in addition to transparent region Reflecting coating, so as to reflect the infrared light of first group of sensor or second group sensor transmitting.
For example, with reference to Fig. 3, green glow filtered region 43, can with that can cover reflecting coating on feux rouges filtered region 42 For the detection light of reflection second sensor group transmitting.Wherein, reflecting coating can be so as to being reflection infrared light Reflecting coating, or the reflecting coating of light reflection ultraviolet.
For convenience, in the embodiment of the present invention, by the institute in first colour wheel in addition to the first area There is region to be referred to as the 3rd region, meanwhile, when first group of sensor detects three region.Produce three level signal； All regions in second colour wheel in addition to the second area are referred to as the 4th region, meanwhile, second group of sensing When device detects four region, the 4th level signal is produced.
In the embodiment of the present invention, first group of sensor can be to include the first emission sensor and first to receive sensor One group of sensor, wherein, first emission sensor is located at the first face of first colour wheel, for emission detection light；Institute State the detection light that the first reception sensor is launched positioned at the second face of first colour wheel and positioned at first emission sensor Light path on.Wherein, the detection light of the first emission sensor transmitting can be ultraviolet light or infrared light.
The first group of sensor can also be to include one group of sensor of the first sending and receiving sensor, wherein, described first Sending and receiving sensor is used for emission detection light, and the light path and first colour wheel of the detection light of first sending and receiving sensor transmitting One side it is vertical.Wherein, the detection light of the first sending and receiving sensor transmitting can be ultraviolet light or infrared light.
Accordingly, the second group sensor can be to include the second emission sensor and second to receive one group of sensor Sensor, wherein, second emission sensor is located at the first face of second colour wheel, for emission detection light；Described Two, which receive sensor, is located at the second face of second colour wheel and the light for the detection light launched positioned at second emission sensor Lu Shang.Wherein, the detection light of the second emission sensor transmitting can be ultraviolet light or infrared light.
The second group sensor can also be to include one group of sensor of the second sending and receiving sensor, wherein, described second Sending and receiving sensor is used for emission detection light, and the light path and first colour wheel of the detection light of second sending and receiving sensor transmitting One side it is vertical.Wherein, the detection light of the second sending and receiving sensor transmitting can be ultraviolet light or infrared light.
In the embodiment of the present invention, high level can be produced when first group of sensor detects the first area in the first colour wheel Signal, low level signal can be produced when detecting three region in the first colour wheel；Or, first group of sensor detects Height can be produced when can produce low level signal during first area in color wheel, detect three region in the first colour wheel Level signal.Because the level signal for detecting first area from the 3rd region is produced is different, so that in each of the first colour wheel Level skip signal (being respectively rising edge skip signal and trailing edge skip signal) twice can be produced in swing circle, so that One of level skip signal can be regard as the first level skip signal.
Accordingly, high level signal, spy can be produced when second group sensor detects the second area in the second colour wheel Low level signal can be produced when measuring four region in the second colour wheel；Or, second group sensor detects the second colour wheel In second area when high level letter can be produced when can produce low level signal, detect four region in the second colour wheel Number.Because the level signal for detecting second area from the 4th region is produced is different, so that in each rotation of optical filtering conversion equipment Turn-week is interim can to produce level skip signal (being respectively rising edge skip signal and trailing edge skip signal) twice, so as to To regard one of level skip signal as the first level skip signal.
With reference to above description, describe specifically how to produce the first level skip signal and second electrical level saltus step letter below Number.
The generation of first level skip signal can have following several ways：
Mode one：
First group of sensor is to include the first emission sensor and first to receive one group of sensor of sensor, described first When region is the transparent region in the first colour wheel, described first receive sensor can the first colour wheel each swing circle the The first level skip signal is produced during the detection light for once receiving the first emission sensor transmitting.
When the detection optical detection of now first emission sensor transmitting is to the first area, the detection light can be with Through the first area and receive sensor by described first to receive, so that in each swing circle first time of the first colour wheel The first level skip signal is produced when detecting the first area.Optionally, first emission sensor is launched Detection light is in each swing circle of the first colour wheel detects first colour wheel for the first time in addition to the first area All regions (in the embodiment of the present invention be referred to as the 3rd region) when, the detection light cannot pass through the 3rd region, therefore The first reception sensor can not receive the detection light of the first emission sensor transmitting, so that in the first colour wheel Each swing circle can produce the 3rd level skip signal when detecting three region for the first time.
Mode two：
First group of sensor is to include the first emission sensor and first to receive one group of sensor of sensor, described first When region is the aluminium base area of uncoated fluorescent material in the first colour wheel, described first receives sensor can be in the every of the first colour wheel Individual swing circle produces the first level saltus step when not receiving the detection light of the first emission sensor transmitting for the first time Signal.When now the detection optical detection of the first emission sensor transmitting is to the first area, the detection light cannot Through the first area, so that the first reception sensor can not receive the detection of the first emission sensor transmitting Light, so as to produce the first level saltus step when each swing circle of the first colour wheel detects the first area for the first time Signal.Optionally, the detection light of the first emission sensor transmitting is detected for the first time in each swing circle of the first colour wheel It is the transparent region in the first colour wheel due to the 3rd region during to three region, the detection light can pass through institute The 3rd region is stated, therefore the first reception sensor can receive the detection light of the first emission sensor transmitting, from And can produce the 3rd level skip signal when each swing circle of the first colour wheel detects three region for the first time.
Mode three：
First group of sensor is to include during one group of sensor of the first sending and receiving sensor, the first area be the first colour wheel Transparent region when, first sending and receiving sensor the first colour wheel each swing circle for the first time do not receive described first The first level skip signal is produced during the reflected light of the detection light of sending and receiving sensor transmitting.
When now the detection optical detection of the first sending and receiving sensor transmitting is to the first area, first transmitting-receiving is passed The detection light of sensor transmitting can pass through the first area, first sending and receiving sensor so that described first can not be received The reflected light of the detection light of sending and receiving sensor transmitting, so that each swing circle in the first colour wheel detects described for the first time The first level skip signal is produced during one region.Accordingly, the detection light of the first sending and receiving sensor transmitting is first When each swing circle of colour wheel detects three region for the first time, the detection light of the first sending and receiving sensor transmitting can To be capped the aluminium base region reflection of layer of fluorescent powder, first sending and receiving sensor is received so as to receive described first The reflected light of the detection light of sensor emission is sent out, so that each swing circle in the first colour wheel detects the described 3rd for the first time The 3rd level skip signal is produced during region.
Mode four：
First group of sensor is to include during one group of sensor of the first sending and receiving sensor, the first area be the first colour wheel During the aluminium base area of uncoated fluorescent material, first sending and receiving sensor is received for the first time in each swing circle of the first colour wheel The first level skip signal is produced during the reflected light for the detection light launched to first sending and receiving sensor.
When now the detection optical detection of the first sending and receiving sensor transmitting is to the first area, first transmitting-receiving is passed Sensor transmitting detection light can be capped layer of fluorescent powder aluminium base region reflect, first sending and receiving sensor so as to With the reflected light for the detection light for receiving first sending and receiving sensor transmitting, so that in each swing circle the of the first colour wheel The first level skip signal is produced when once detecting the first area.Accordingly, the first sending and receiving sensor hair The detection light penetrated is when each swing circle of the first colour wheel detects three regions for the first time, because the 3rd region is the Transparent region in color wheel, the detection light of first sending and receiving sensor transmitting can pass through the 3rd region, and described the One sending and receiving sensor is so as to receive the reflected light of the detection light of the first sending and receiving sensor transmitting, so that in the first color Each swing circle of wheel produces the 3rd level skip signal when detecting three region for the first time.
Accordingly, the generation of second electrical level skip signal can have following several ways：
Mode one：
Second group sensor is to include the second emission sensor and second to receive one group of sensor of sensor, described second When region is the transparent region in the second colour wheel, described second receive sensor can the second colour wheel each swing circle the The second electrical level skip signal is produced during the detection light for once receiving the second emission sensor transmitting.Now described When the detection optical detection of two emission sensors transmitting is to the second area, the detection light can be through the second area simultaneously Sensor is received by described second to receive, so that each swing circle in the second colour wheel detects the second area for the first time When produce the second electrical level skip signal.Optionally, the detection light of the second emission sensor transmitting is in the second colour wheel When each swing circle detects four region of one layer of reflecting coating of covering in second colour wheel for the first time, the detection light The 4th region cannot be passed through, therefore the second reception sensor can not receive the second emission sensor transmitting Detection light, so as to produce the 4th level skip signal.
Mode two：
Second group sensor is to include the second emission sensor and second to receive one group of sensor of sensor, described second When region is all regions in addition to transparent region in the second colour wheel, described second receives sensor can be in the second colour wheel Each swing circle produce the second electrical level when not receiving the detection light of second emission sensor transmitting for the first time Skip signal.Wherein, the second area covers one layer of reflecting coating.
When now the detection optical detection of the second emission sensor transmitting is to the second area, the detection light can not With through the second area, so that the second reception sensor can not receive the detection of the second emission sensor transmitting Light, so as to produce the second electrical level saltus step when each swing circle of the second colour wheel detects the second area for the first time Signal.Optionally, the detection light of the second emission sensor transmitting is detected for the first time in each swing circle of the second colour wheel It is the transparent region in the second colour wheel due to the 4th region during to four regions, the detection light can pass through the 4th area Domain, therefore the second reception sensor can receive the detection light of the second emission sensor transmitting, so as to produce Raw 4th level skip signal.
Mode three：
Second group sensor is that one group of sensor, the second area for including the second sending and receiving sensor are the second colour wheel Transparent region when, second sending and receiving sensor the second colour wheel each swing circle for the first time do not receive described second The second electrical level skip signal is produced during the reflected light of the detection light of sending and receiving sensor transmitting.
When now the detection optical detection of the second sending and receiving sensor transmitting is to the second area, second transmitting-receiving is passed The detection light of sensor transmitting can pass through the second area, second sending and receiving sensor so that described second can not be received The reflected light of the detection light of sending and receiving sensor transmitting, so that each swing circle in the second colour wheel detects described for the first time The second electrical level skip signal is produced during two regions.Accordingly, the 4th region in the second colour wheel is one layer of reflective painting of covering The region of layer, the detection light of the second sending and receiving sensor transmitting detects institute for the first time in each swing circle of the second colour wheel When stating four regions, the detection light of the second sending and receiving sensor transmitting can be reflected by the 4th region, and second transmitting-receiving is passed Sensor is so as to receive the reflected light of the detection light of the second sending and receiving sensor transmitting, so as to produce the 4th level Skip signal.
Mode four：
Second group sensor is that one group of sensor, the second area for including the second sending and receiving sensor are the second colour wheel During all regions in addition to transparent region, second sending and receiving sensor the second colour wheel each swing circle for the first time The second electrical level skip signal is produced during the reflected light for the detection light for receiving the second sending and receiving sensor transmitting.Wherein, The second area covers one layer of reflecting coating.
When now the detection optical detection of the second sending and receiving sensor transmitting is to the second area, second transmitting-receiving is passed One layer of reflecting coating being covered by second area of detection light of sensor transmitting reflects, second sending and receiving sensor so as to With the reflected light for the detection light for receiving second sending and receiving sensor transmitting, so that in each swing circle the of the second colour wheel The second electrical level skip signal is produced when once detecting the second area.Accordingly, the second sending and receiving sensor hair The detection light penetrated is when each swing circle of the second colour wheel detects four regions for the first time, because the 4th region is Area pellucida domain, the detection light of the second sending and receiving sensor transmitting can pass through the 4th region, second sending and receiving sensor So as to which the reflected light for detecting light of the second sending and receiving sensor transmitting can not be received, so as to produce the 4th level saltus step Signal.
It should be noted that in the embodiment of the present invention, the swing circle phase of the swing circle of the first colour wheel and the second colour wheel Deng when the first colour wheel is identical with the direction of rotation of filter, the corresponding region fan angle of each color is identical, rotating Vortex When each color sequential it is identical.
The transparent region of first colour wheel is blue light light extraction region, and remaining two parts is respectively that feux rouges transition region and green glow turn The transparent region changed in region, the first colour wheel is identical with the center of circle angle of the transparent region in the second colour wheel；In first colour wheel Feux rouges transition region is identical with the center of circle angle of the feux rouges filtered region in the second colour wheel；Green glow transition region in first colour wheel It is identical with the center of circle angle of the green glow filtered region in the second colour wheel；And the first colour wheel area corresponding with each color in the second colour wheel The distributing order in domain is identical, therefore need to be only that blue region is synchronous transparent region, then red light region and green wavelength will be right Should be synchronous.Monochromatic laser light source system only can also include N number of light source module, i.e. monochromatic source comprising a light source module The corresponding fluorescent wheel of system will have one or N number of, including the filter wheel in the light path of rear end, and whole monochromatic source system then has two Or N+1 colour wheel, for ensure whole laser source system output purity very high monochromatic light (such as red light, green light or Blue light), it is necessary to N+1 colour wheel in whole optical projection system is all precisely synchronous, it can just make what laser source system was exported Non-mixed color between monochromatic light, also greatly improves the efficiency of whole optical projection system light.
In step 102, if judging the time difference of the first level skip signal and the second electrical level skip signal not It is threshold value, then needs to adjust the rotating speed of first colour wheel and/or second colour wheel so that the first level skip signal Time difference with the second electrical level skip signal is the threshold value.
In the embodiment of the present invention, the first level skip signal, second electrical level skip signal, the 3rd level skip signal and 4th level skip signal can be respectively rising edge skip signal, or trailing edge skip signal, the embodiment of the present invention This is not limited.
The design of the first colour wheel and the second colour wheel can be rotated according to identical direction of rotation in the embodiment of the present invention, example Such as, the first colour wheel and the second colour wheel can all turn clockwise, can also all rotate counterclockwises.Below to the first colour wheel and second It is described exemplified by the equidirectional rotation of colour wheel.
It is described below according to different situations：
Before described, the duration of the first level signal and the duration of second electrical level signal are first defined.The The duration of one level signal is in a swing circle of the first colour wheel, the detection optical detection of first group of sensor transmitting arrives The duration of transparent region in first colour wheel；Or, the duration of the first level signal revolves for one of color filtering mean In the turn-week phase, the duration of transparent region of the detection optical detection that second group sensor is launched into color filtering mean.
For example, the detection optical detection of sensor emission corresponding with fluorescent material wheel is to the duration of transparent region The duration of first level signal；Or, transparent region is arrived in the detection optical detection of sensor emission corresponding with filter wheel Duration is the duration of the first level signal.
The duration of second electrical level signal is the spy of first group of sensor transmitting in a swing circle of the first colour wheel Light-metering detects the duration in the fluorescent material area in the first colour wheel；Or, the duration of second electrical level signal is the second color Wheel a swing circle in, second group sensor transmitting detection optical detection to the colour filter region in the second colour wheel it is lasting when Between.
For example, the detection optical detection of sensor emission corresponding with fluorescent material wheel is to the duration in fluorescent material area The duration of second electrical level signal；Or, filtered region is arrived in the detection optical detection of sensor emission corresponding with filter wheel Duration is the duration of second electrical level signal.
Meanwhile, it is that the clear area in the first colour wheel is detected with first group of sensor in each case described below Low level signal is produced when high level signal, the fluorescent material area detected in the first colour wheel are produced during domain；And second group of sensing Produced when high level signal is produced when device detects the transparent region in the second colour wheel, the filtered region in the second colour wheel is detected It is described exemplified by low level signal, other situations may be referred to following description, be not repeated herein.
The first situation：
First colour wheel and the second colour wheel rotate according to identical direction of rotation.If first area is transparent in the first colour wheel Region；Second area is the transparent region in the second colour wheel.When first group of sensor detects the first area in the first colour wheel Low level signal is produced when producing high level signal, detecting three region in the first colour wheel.Second group sensor is detected Low level letter is produced when high level signal is produced during second area in the second colour wheel, four region in the second colour wheel is detected Number.First level skip signal is that rising edge skip signal, second electrical level skip signal are rising edge skip signal.Now detect The time difference of the first level skip signal arrived and second electrical level skip signal can be 0.
For example, as shown in figure 8, being a kind of level skip signal schematic diagram provided in an embodiment of the present invention.In Fig. 8, Rising edge skip signal 401 is the first area production in each swing circle of the first colour wheel detects the first colour wheel for the first time The first raw level skip signal, rising edge skip signal 402 is to be detected in each swing circle first time of the second colour wheel The second electrical level skip signal that second area in second colour wheel is produced.If detecting rising edge skip signal 401 and rising edge The time difference is not 0 between skip signal 402, then can determine that the first colour wheel is asynchronous with the rotation of the second colour wheel, it is necessary to carry out Regulation.
For example, the first colour wheel is fluorescent material wheel, and the second colour wheel is filter wheel.Fluorescent material wheel is with filter wheel according to phase Same direction of rotation rotation.First group of sensor corresponding with fluorescent material wheel is visited for the first time in each swing circle of fluorescent material wheel When measuring the transparent region of fluorescent material wheel, the rising edge skip signal 401 corresponded in Fig. 9 is produced；Corresponding with filter wheel Two groups of sensors produce when each swing circle of filter wheel detects the transparent region of filter wheel for the first time and correspond to Fig. 9 In rising edge skip signal 402.Because fluorescent material wheel and filter wheel rotate according to identical direction of rotation, now at one In swing circle, the time difference between rising edge skip signal 401 and rising edge skip signal 402 should be 0, however, it is determined that rise It is △ T1 along the time difference between skip signal 401 and rising edge skip signal 402, wherein △ T1 are more than 0, then need to glimmering The rotary speed of light powder wheel and/or filter wheel is adjusted so that rising edge skip signal 401 and rising edge skip signal 402 Between the time difference be 0, so as to realize that the rotation of fluorescent material wheel and filter wheel is synchronous.
Second of situation：
First colour wheel and the second colour wheel rotate according to identical direction of rotation.If first area is saturating in the first colour wheel Area pellucida domain；Second area is all regions in the second colour wheel in addition to transparent region, and second area is anti-for one layer of covering The region of light coating, i.e. filtered region.First group of sensor produces high level letter when detecting the first area in the first colour wheel Number, produce low level signal when detecting three region in the first colour wheel.Second group sensor is detected in the second colour wheel High level signal is produced when low level signal is produced during second area, four region in the second colour wheel is detected.First level Skip signal is that rising edge skip signal, second electrical level skip signal are trailing edge skip signal.Now, in a swing circle It is interior, looked with the transmitting terminal of the sensor of emission detection light, if the first colour wheel and the second colour wheel all rotate counterclockwise when, detect The first level skip signal and second electrical level skip signal time difference can be second electrical level signal duration；One In individual swing circle, looked with the transmitting terminal of the sensor of emission detection light, if the first colour wheel and all dextrorotations of the second colour wheel When turning, the time difference of the first level skip signal detected and second electrical level skip signal can holding for second electrical level signal The continuous time.
For example, the first colour wheel is fluorescent material wheel, and the second colour wheel is filter wheel.With the hair of the sensor of emission detection light Penetrate end to look, if fluorescent material wheel and filter wheel all rotate counterclockwises.As shown in Figure 10, it is a kind of electricity provided in an embodiment of the present invention Flat skip signal schematic diagram.In Figure 10, each swing circle of the first group of sensor corresponding with fluorescent material wheel in fluorescent material wheel It is rising edge skip signal 601 to detect the first level skip signal produced during the transparent region in fluorescent material wheel for the first time, Color filter regions of the first group of sensor corresponding with filter wheel in each swing circle of filter wheel detects filter wheel for the first time The second electrical level skip signal produced during domain is trailing edge skip signal 602.Rising edge skip signal 601 is believed with trailing edge saltus step Number 602 time difference in a swing circle is the duration of second electrical level signal, i.e. the spy of first group of sensor transmitting Light-metering detects the duration in the fluorescent material area in fluorescent material.If detecting rising edge skip signal 601 and trailing edge saltus step The time difference is not the duration of second electrical level signal between signal 602, then can determine the rotation of fluorescent material wheel and filter wheel It is asynchronous, it is necessary to be adjusted.Specifically, being that a kind of level provided in an embodiment of the present invention is jumped as shown in figure 11 with reference to Figure 10 Varying signal schematic diagram.In Figure 11, the time difference is △ T2 between rising edge skip signal 601 and trailing edge skip signal 602, wherein △ T2 are less than the duration of second electrical level signal.Now need to adjust the rotary speed of fluorescent material wheel and/or filter wheel Section so that between rising edge skip signal 601 and trailing edge skip signal 602 time difference for second electrical level signal it is lasting when Between, so as to realize that fluorescent material wheel is synchronous with the rotation of filter wheel.
The third situation：
First colour wheel and the second colour wheel rotate according to identical direction of rotation.If first area be the first colour wheel in be not coated with Cover the aluminium base area of fluorescent material；Second area is the transparent region in the second colour wheel.First group of sensor detects the first colour wheel In first area when produce low level signal, produce high level signal when detecting three region in the first colour wheel.Second Group sensor produces high level signal, the 4th region detected in the second colour wheel when detecting the second area in the second colour wheel When produce low level signal.First level skip signal is that trailing edge skip signal, second electrical level skip signal are that rising edge is jumped Varying signal.Now, in a swing circle, looked with the transmitting terminal of the sensor of emission detection light, if the first colour wheel and Two colour wheels all rotate counterclockwise when, the time difference of the first level skip signal and second electrical level skip signal that detect can be The duration of first level signal；In a swing circle, looked with the transmitting terminal of the sensor of emission detection light, if the When color wheel and the second colour wheel all turn clockwise, the first level skip signal for detecting and second electrical level skip signal when Between difference can be the first level signal duration.
For example, the first colour wheel is fluorescent material wheel, and the second colour wheel is filter wheel.With the hair of the sensor of emission detection light Penetrate end to look, if fluorescent material wheel and filter wheel all rotate counterclockwises.As shown in figure 12, it is a kind of electricity provided in an embodiment of the present invention Flat skip signal schematic diagram.In Figure 12, trailing edge skip signal 801 is first group of sensor corresponding with fluorescent material wheel in fluorescence Each swing circle of powder wheel detects the first level skip signal that the fluorescent material area in fluorescent material wheel is produced for the first time, rises It is that second group sensor corresponding with filter wheel detects filter for the first time in each swing circle of filter wheel along skip signal 802 The second electrical level skip signal that transparent region in colour wheel is produced.
If detecting the time difference between trailing edge skip signal 801 and rising edge skip signal 802 for the first level not believe Number duration, then can determine that fluorescent material wheel is asynchronous with the rotation of filter wheel, it is necessary to be adjusted.Specifically, with reference to Figure 12, is a kind of level skip signal schematic diagram provided in an embodiment of the present invention as shown in figure 13.In Figure 13, trailing edge saltus step Between signal 801 and rising edge skip signal 802 time difference be △ T3, wherein △ T3 be less than the first level signal it is lasting when Between.Now need that the rotary speed of fluorescent material wheel and/or filter wheel is adjusted so that trailing edge skip signal 801 with it is upper Rise along the time difference between skip signal 802 and be the duration of the first level signal, so as to realize fluorescent material wheel and filter wheel Rotation is synchronous.
4th kind of situation：
First colour wheel and the second colour wheel rotate according to identical direction of rotation.If first area be the first colour wheel in be not coated with Cover the aluminium base area of fluorescent material；Second area is all regions in addition to transparent region in the second colour wheel, and second area To cover the region of one layer of reflecting coating, i.e. filtered region.When first group of sensor detects the first area in the first colour wheel High level signal is produced when producing low level signal, detecting three region in the first colour wheel.Second group sensor is detected High level letter is produced when low level signal is produced during second area in the second colour wheel, four region in the second colour wheel is detected Number.First level skip signal is that trailing edge skip signal, second electrical level skip signal are trailing edge skip signal.Now detect The time difference of the first level skip signal arrived and second electrical level skip signal can be 0.
For example, the first colour wheel is fluorescent material wheel, and the second colour wheel is filter wheel.As shown in figure 14, it is implementation of the present invention A kind of level skip signal schematic diagram that example is provided.In Figure 14, trailing edge skip signal 1001 is corresponding with fluorescent material wheel the The first of fluorescent material area generation of one group of sensor in each swing circle of fluorescent material wheel detects fluorescent material wheel for the first time Level skip signal, trailing edge skip signal 1002 is each rotation of the second group sensor corresponding with filter wheel in filter wheel Cycle detects the second electrical level skip signal that the filtered region in filter wheel is produced for the first time.
, can be with if it is not 0 to detect between trailing edge skip signal 1001 and trailing edge skip signal 1002 time difference Determine that fluorescent material wheel is asynchronous with the rotation of filter wheel, it is necessary to be adjusted.Specifically, being this as shown in figure 15 with reference to Figure 14 A kind of level skip signal schematic diagram that inventive embodiments are provided.In Figure 15, trailing edge skip signal 1001 and trailing edge saltus step The time difference is △ T4 between signal 1002, and wherein △ T4 are more than 0.Now need the speed of the rotation to fluorescent material wheel and/or filter wheel Degree is adjusted so that the time difference is 0 between trailing edge skip signal 1001 and trailing edge skip signal 1002, so as to realize ripple Long fluorescent material wheel is synchronous with the rotation of filter wheel.
If it should be noted that there are multiple first colour wheels, being required for carrying out each first colour wheel with being described above Synchronous method synchronize so that each first colour wheel is synchronous with the rotation of the second colour wheel.
In such scheme, the first colour wheel wheel face region and the second colour wheel wheel face region are detected by sensor, no The mark for needing extra increase label to be recognized as sensor, method is easy directly, and reliability is high, improves double-colored wheel synchronous Efficiency.Due to be using the structure of the first colour wheel and the second color wheel device in itself to the detection signal of sensor formation reflection and Transmission, so as to obtain the first level skip signal and second electrical level skip signal.First level skip signal and the second electricity The level saltus step situation of flat skip signal can reflect the first colour wheel and the second colour wheel signal reflex area itself and signal transmission area Distribution.If the first colour wheel is fluorescent wheel, the laser color of transmission area and phosphor region color in fluorescent wheel can be reflected Switching boundary, that is, from fluorescence color subregion to laser color subregion or from laser color subregion to fluorescence color subregion Change, deviates in the absence of because of MARK tag blocks paste position with color zone boundary position, and causes according to MARK tag blocks There is the error being retarded or advanced in the feedback that the level skip signal of formation changes to color subregion, more smart therefore, it is possible to carry out The accurate colour wheel of control first and the second colour wheel synchronous rotary.
If the second colour wheel is filter wheel, because the color filter regions in filter wheel are that the region that fluorescence is passed through applies reflection painting Layer, can be specifically infrared reflection film or ultraviolet reflectance film, can reflect the light of the wavelength band, while laser transmission area is still protected Explanation exemplified by infrared transmission is held, then the reflection of signal and transmission change, have been accurately reflected from fluorescence color subregion to laser color The change of subregion.So as to which the saltus step of level can accurately reflect the switching of the zone boundary or color color of color, similarly, Compared with the scheme that MARK blocks are pasted in the second color wheel motor side surface, the reacting condition that such scheme switches to color is more Accurately, in the absence of error.
The color switch instances to two colour wheels are compared based on this, can know the synchronism deviation journey of two colour wheels Degree, so as to export situation by adjusting colour wheel rotating speed and observing the second colour wheel color, can more accurately control the first colour wheel With the second colour wheel synchronous rotary.
As shown in figure 16, it is that the embodiment of the present invention also provides a kind of laser projection device structural representation.
In Figure 16, including first group of sensor 1201, second group sensor 1202, control unit 1203.
First group of sensor 1201, the first area in wheel face for detecting the first colour wheel, and in the every of the first colour wheel Individual swing circle produces the first level skip signal when detecting the first area for the first time；
Second group sensor 1202, the second area in wheel face for detecting the second colour wheel, and in the every of the second colour wheel Individual swing circle produces second electrical level skip signal when detecting the second area for the first time；
Control unit 1203, the time for judging the first level skip signal and the second electrical level skip signal Whether difference is threshold value, if it is not, then adjusting the rotating speed of first colour wheel and/or second colour wheel so that first level The time difference of skip signal and the second electrical level skip signal is the threshold value.
Optionally, the first area is the transparent region in first colour wheel, and the transparent region is described first The laser transmission area of colour wheel so that each swing circle first of the detection light of the first group of sensor transmitting in the first colour wheel Secondary when detecting the first area, the detection light of the first group of sensor transmitting is through the first area and by described the One group of sensor is received, and produces the first level skip signal；Or, the first area is aluminium base area so that described The detection light of first group of sensor transmitting is when each swing circle of the first colour wheel detects the first area for the first time, institute The detection light for stating first group of sensor transmitting is reflected and received by the first group of sensor by the first area, produces described First level skip signal；
The second area is the transparent region in second colour wheel so that the detection of the second group sensor transmitting Light is when each swing circle of the second colour wheel detects the second area for the first time, the spy of the second group sensor transmitting Light-metering is received through the second area and by the second group sensor, produces the second electrical level skip signal；Or, institute It is the filtered region in second colour wheel to state second area, and the surface of the filtered region covers one layer of reflecting coating, is used for Reflect the detection light of the second group sensor transmitting so that the detection light of the second group sensor transmitting is in the second colour wheel When each swing circle detects the second area for the first time, the detection light of the second group sensor transmitting is by described second Region is reflected and received by the second group sensor, produces the second electrical level skip signal；
Wherein, the transparent region in the transparent region or second colour wheel in first colour wheel is by clear glass system Into, or be made up of transparent diffuser panel material.
Optionally, the first group of sensor 1201 includes the first emission sensor and first receives sensor, described the One emission sensor is located at the first face of first colour wheel, for emission detection light；Described first, which receives sensor, is located at institute State in the second face and the light path for the detection light launched positioned at first emission sensor of the first colour wheel；
The detection light of the first emission sensor transmitting detects institute for the first time in each swing circle of the first colour wheel When stating first area, the detection light is through the first area and receives sensor by described first and receives, and produces described the One level skip signal.
Optionally, the first group of sensor 1201 includes the first emission sensor and first receives sensor, described the One emission sensor is located at the first face of first colour wheel, for emission detection light；Described first, which receives sensor, is located at institute State in the second face and the light path for the detection light launched positioned at first emission sensor of the first colour wheel；
The detection light of the first emission sensor transmitting detects institute for the first time in each swing circle of the first colour wheel When stating first area, the detection light of the first emission sensor transmitting is reflected, and produces the first level skip signal.
Optionally, the first group of sensor 1201 includes the first sending and receiving sensor, and first sending and receiving sensor is used for Emission detection light, and the light path of the detection light of first sending and receiving sensor transmitting is vertical with the one side of first colour wheel；
The detection light that sensor emission is penetrated in first transmitting-receiving is detected for the first time in each swing circle of the first colour wheel During the first area, the detection light passes through the first area, produces the first level skip signal.
Optionally, the first group of sensor 1201 includes the first sending and receiving sensor, and first sending and receiving sensor is used for Emission detection light, and the light path of the detection light of first sending and receiving sensor transmitting is vertical with the one side of first colour wheel；
The detection light that sensor emission is penetrated in first transmitting-receiving is detected for the first time in each swing circle of the first colour wheel The reflected light formed during the first area is received by first sending and receiving sensor, produces the first level skip signal.
Optionally, the second group sensor 1202 includes the second emission sensor and second receives sensor, described the Two emission sensors are located at the first face of second colour wheel, for emission detection light；Described second, which receives sensor, is located at institute State in the second face and the light path for the detection light launched positioned at second emission sensor of the second colour wheel；
The detection light of the second emission sensor transmitting detects institute for the first time in each swing circle of the second colour wheel When stating second area, the detection light is through the second area and receives sensor by described second and receives, and produces described the Two level skip signals.
Optionally, the second group sensor 1202 includes the second emission sensor and second receives sensor, described the Two emission sensors are located at the first face of second colour wheel, for emission detection light；Described second, which receives sensor, is located at institute State in the second face and the light path for the detection light launched positioned at second emission sensor of the second colour wheel；
The detection light of the second emission sensor transmitting detects institute for the first time in each swing circle of the second colour wheel When stating second area, the detection light of the second emission sensor transmitting is reflected, and produces the second electrical level skip signal.
Optionally, the second group sensor 1202 includes the second sending and receiving sensor, and second sending and receiving sensor is used for Emission detection light, and the light path of the detection light of second sending and receiving sensor transmitting is vertical with the one side of second colour wheel；
The detection light that sensor emission is penetrated in second transmitting-receiving is detected for the first time in each swing circle of the second colour wheel During the second area, the detection light passes through the second area, produces the second electrical level skip signal.
Optionally, the second group sensor 1202 includes the second sending and receiving sensor, and second sending and receiving sensor is used for Emission detection light, and the light path of the detection light of second sending and receiving sensor transmitting is vertical with the one side of second colour wheel；
The detection light of the second sending and receiving sensor transmitting detects institute for the first time in each swing circle of the second colour wheel State the reflected light formed during second area to be received by second sending and receiving sensor, produce the second electrical level skip signal.
The method provided according to embodiments of the present invention, by using the difference of material of the first colour wheel and the second colour wheel itself, Suitable sensor is selected to detect its colour wheel, it is not necessary to the mark that extra increase label is recognized as sensor, because Can precisely it switch between each color of light of this each colour wheel final output, non-mixed color light.And use at present color wheel motor turn Black light-absorbing adhesive tape is pasted on axle or on colour wheel wheel face to make marks, and so that sensor can detect the mark of colour wheel, and then is obtained The initial time of colour wheel rotating speed and the synchronous color of identification, what is pasted by aliging is marked to realize the synchronization of colour wheel, and the method is needed Binding mark is wanted, therefore in the presence of the inevitable errors of assembling, there is colour mixture, it is necessary to reject this portion between the synchronous latter two color of colour wheel Divide colour mixture, so as to have impact on the brightness of image of whole optical projection system.The detection method that the present invention is provided and patch black light-absorbing adhesive tape Compared the method that makes marks, the precision of the method detection is high, and method is easy, reduces the complicated journey of internal control system software and hardware Degree, improves the light efficiency of optical-mechanical system, increases the output brightness of optical-mechanical system, makes the pattern colour of whole laser projection system output Coloured silk configuration more accurate, saturation degree is higher.
, but those skilled in the art once know basic creation although preferred embodiments of the present invention have been described Property concept, then can make other change and modification to these embodiments.So, appended claims are intended to be construed to include excellent Select embodiment and fall into having altered and changing for the scope of the invention.
Obviously, those skilled in the art can carry out the model of various changes and modification without departing from the present invention to the present invention Enclose.So, if these modifications and variations of the present invention belong within the scope of the claims in the present invention, then the present invention is also intended to Including these changes and modification.

Claims (12)

1. a kind of many colour wheel synchronous method, it is characterised in that this method includes：
The first area in the wheel face of the first colour wheel is detected by first group of sensor, and in each swing circle of the first colour wheel Interior first time produces the first level skip signal when detecting the first area；
The second area in the wheel face of the second colour wheel is detected by second group sensor, and in each swing circle of the second colour wheel Interior first time produces second electrical level skip signal when detecting the second area；
Whether the time difference for judging the first level skip signal and the second electrical level skip signal is threshold value, if it is not, then Adjust the rotating speed of first colour wheel and/or second colour wheel so that the first level skip signal and the described second electricity The time difference of flat skip signal is the threshold value.
2. the method as described in claim 1, it is characterised in that the first area is the clear area in first colour wheel Domain so that the detection light of the first group of sensor transmitting detects described for the first time in each swing circle of the first colour wheel During first area, the detection light of the first group of sensor transmitting is connect through the first area and by the first group of sensor Receive, produce the first level skip signal, wherein, first group of sensor is to include the first emission sensor and first to receive biography One group of sensor of sensor；Or, the first area is the aluminium base area of the uncoated fluorescent material in first colour wheel, is made The detection light for obtaining the first group of sensor transmitting detects described first for the first time in each swing circle of the first colour wheel During region, the detection light of the first group of sensor transmitting is reflected and connect by the first group of sensor by the first area Receive, produce the first level skip signal, wherein, the first group of sensor is to include one group of biography of the first sending and receiving sensor Sensor；
The second area is the transparent region in second colour wheel so that the detection light of the second group sensor transmitting exists When detecting the second area for the first time in each swing circle of the second colour wheel, the detection of the second group sensor transmitting Light is received through the second area and by the second group sensor, produces the second electrical level skip signal, wherein, second Group sensor is to include the second emission sensor and second to receive one group of sensor of sensor；Or, the second area is Filtered region in second colour wheel, the surface of the filtered region covers one layer of reflecting coating, for reflecting described second The detection light of group sensor emission so that each swing circle of the detection light of the second group sensor transmitting in the second colour wheel When interior first time detects the second area, the detection light of the second group sensor transmitting is reflected simultaneously by the second area Received by the second group sensor, produce the second electrical level skip signal, wherein, the second group sensor is to include the One group of sensor of two sending and receiving sensors；
Wherein, the transparent region in the transparent region or second colour wheel in first colour wheel is made up of clear glass, Or be made up of transparent diffuser panel material.
3. method as claimed in claim 1 or 2, it is characterised in that the first area is transparent in first colour wheel Region；
The first area detected by first group of sensor in the first colour wheel, and in each swing circle of the first colour wheel The first level skip signal is produced when detecting the first area for the first time, including：
The first group of sensor includes the first emission sensor and first and receives sensor, and first emission sensor is located at First face of first colour wheel, for emission detection light；Described first receives second that sensor is located at first colour wheel In the light path of face and the detection light launched positioned at first emission sensor；
The detection light of the first emission sensor transmitting detects described for the first time in each swing circle of the first colour wheel During first area, the detection light through the first area and receives sensor reception by described first, produces described first Level skip signal.
4. method as claimed in claim 1 or 2, it is characterised in that the first area is transparent in first colour wheel Region；
The first area detected by first group of sensor in the first colour wheel, and in each swing circle of the first colour wheel The first level skip signal is produced when detecting the first area for the first time, including：
The first group of sensor includes the first sending and receiving sensor, and first sending and receiving sensor is used for emission detection light, and institute The light path for stating the detection light of the first sending and receiving sensor transmitting is vertical with the one side of first colour wheel；
The detection light of the first sending and receiving sensor transmitting detects described for the first time in each swing circle of the first colour wheel During first area, the detection light passes through the first area, produces the first level skip signal.
5. method as claimed in claim 1 or 2, it is characterised in that the second area is transparent in second colour wheel Region；
Second area in second colour wheel is detected by second group sensor, and first in each swing circle of the second colour wheel It is secondary to produce second electrical level skip signal when detecting the second area, including：
The second group sensor includes the second emission sensor and second and receives sensor, and second emission sensor is located at First face of second colour wheel, for emission detection light；Described second receives second that sensor is located at second colour wheel In the light path of face and the detection light launched positioned at second emission sensor；
The detection light of the second emission sensor transmitting detects described for the first time in each swing circle of the second colour wheel During second area, the detection light through the second area and receives sensor reception by described second, produces described second Level skip signal.
6. method as claimed in claim 1 or 2, it is characterised in that the second area is transparent in second colour wheel Region；
Second area in second colour wheel is detected by second group sensor, and first in each swing circle of the second colour wheel It is secondary to produce second electrical level skip signal when detecting the second area, including：
The second group sensor includes the second sending and receiving sensor, and second sending and receiving sensor is used for emission detection light, and institute The light path for stating the detection light of the second sending and receiving sensor transmitting is vertical with the one side of second colour wheel；
The detection light that sensor emission is penetrated in second transmitting-receiving detects institute for the first time in each swing circle of the second colour wheel When stating second area, the detection light passes through the second area, produces the second electrical level skip signal.
7. a kind of laser projection device：Including the first colour wheel and the second colour wheel, it is characterised in that at least include：
First group of sensor, the first area in wheel face for detecting the first colour wheel, and in each revolution of the first colour wheel The first level skip signal is produced when detecting the first area for the first time in the phase；
Second group sensor, the second area in wheel face for detecting the second colour wheel, and in each revolution of the second colour wheel Second electrical level skip signal is produced when detecting the second area in the phase for the first time；
Control unit, for judge the first level skip signal and the second electrical level skip signal time difference whether be Threshold value, if it is not, then adjusting the rotating speed of first colour wheel and/or second colour wheel so that the first level skip signal Time difference with the second electrical level skip signal is the threshold value.
8. device as claimed in claim 7, it is characterised in that the first area is the clear area in first colour wheel Domain so that the detection light of the first group of sensor transmitting detects described for the first time in each swing circle of the first colour wheel During first area, the detection light of the first group of sensor transmitting is connect through the first area and by the first group of sensor Receive, produce the first level skip signal, wherein, first group of sensor is to include the first emission sensor and first to receive biography One group of sensor of sensor；Or, the first area is the aluminium base area of the uncoated fluorescent material in first colour wheel, is made The detection light for obtaining the first group of sensor transmitting detects described first for the first time in each swing circle of the first colour wheel During region, the detection light of the first group of sensor transmitting is reflected and connect by the first group of sensor by the first area Receive, produce the first level skip signal, wherein, the first group of sensor is to include one group of biography of the first sending and receiving sensor Sensor；
The second area is the transparent region in second colour wheel so that the detection light of the second group sensor transmitting exists When detecting the second area for the first time in each swing circle of the second colour wheel, the detection of the second group sensor transmitting Light is received through the second area and by the second group sensor, produces the second electrical level skip signal, wherein, second Group sensor is to include the second emission sensor and second to receive one group of sensor of sensor；Or, the second area is Filtered region in second colour wheel, the surface of the filtered region covers one layer of reflecting coating, for reflecting described second The detection light of group sensor emission so that each swing circle of the detection light of the second group sensor transmitting in the second colour wheel When interior first time detects the second area, the detection light of the second group sensor transmitting is reflected simultaneously by the second area Received by the second group sensor, produce the second electrical level skip signal, wherein, the second group sensor is to include the One group of sensor of two sending and receiving sensors；
Wherein, the transparent region in the transparent region or second colour wheel in first colour wheel is made up of clear glass, Or be made up of transparent diffuser panel material.
9. device as claimed in claim 7 or 8, it is characterised in that the first area is transparent in first colour wheel Region；
The first group of sensor includes the first emission sensor and first and receives sensor, and first emission sensor is located at First face of first colour wheel, for emission detection light；Described first receives second that sensor is located at first colour wheel In the light path of face and the detection light launched positioned at first emission sensor；
The detection light of the first emission sensor transmitting detects described for the first time in each swing circle of the first colour wheel During first area, the detection light through the first area and receives sensor reception by described first, produces described first Level skip signal.
10. device as claimed in claim 7 or 8, it is characterised in that the first area is transparent in first colour wheel Region；
The first group of sensor includes the first sending and receiving sensor, and first sending and receiving sensor is used for emission detection light, and institute The light path for stating the detection light of the first sending and receiving sensor transmitting is vertical with the one side of first colour wheel；
The detection light of the first sending and receiving sensor transmitting detects described for the first time in each swing circle of the first colour wheel During first area, the detection light passes through the first area, produces the first level skip signal.
11. device as claimed in claim 7 or 8, it is characterised in that the second area is transparent in second colour wheel Region；
The second group sensor includes the second emission sensor and second and receives sensor, and second emission sensor is located at First face of second colour wheel, for emission detection light；Described second receives second that sensor is located at second colour wheel In the light path of face and the detection light launched positioned at second emission sensor；
The detection light of the second emission sensor transmitting detects described for the first time in each swing circle of the second colour wheel During second area, the detection light through the second area and receives sensor reception by described second, produces described second Level skip signal.
12. device as claimed in claim 7 or 8, it is characterised in that the second area is transparent in second colour wheel Region；
The second group sensor includes the second sending and receiving sensor, and second sending and receiving sensor is used for emission detection light, and institute The light path for stating the detection light of the second sending and receiving sensor transmitting is vertical with the one side of second colour wheel；
The detection light that sensor emission is penetrated in second transmitting-receiving detects institute for the first time in each swing circle of the second colour wheel When stating second area, the detection light passes through the second area, produces the second electrical level skip signal.
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