CN105988269A - Projection system, light source system, and light source control device and control method - Google Patents
Projection system, light source system, and light source control device and control method Download PDFInfo
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- CN105988269A CN105988269A CN201510063617.2A CN201510063617A CN105988269A CN 105988269 A CN105988269 A CN 105988269A CN 201510063617 A CN201510063617 A CN 201510063617A CN 105988269 A CN105988269 A CN 105988269A
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Abstract
The invention provides a projection system, a light source system, and a light source control device and control method. The light source control device comprises a temperature control array, wherein the temperature control array comprises at least one temperature control device, and the temperature control device is used for controlling the temperature of a laser source; a first light splitting device arranged in a light transmission path of the lasers emitted by the laser source and used for dividing the lasers into detecting lasers and useful lasers in a time division or light intensity division mode; and a detection device, wherein the detection device is arranged in the light transmission path of the detecting lasers and is used for detecting the intensity of the detecting lasers, determining the current wavelength of the laser source according to the intensity, generating a control signal according to the current wavelength, and sending the control signal to the temperature control device. The temperature control device controls the temperature of the laser source so as to control the wavelength of the laser source, so that the wavelength of the laser source is precisely controlled, and speckles are further eliminated by the control over the wavelength diversity of the laser source.
Description
Technical field
The present invention relates to projection display technique field, more particularly, it relates to a kind of optical projection system, light source
System, light source control device and control method.
Background technology
Existing optical projection system uses semiconductor laser as projection light source mostly, uses as HONGGUANG
Red laser as light source, but, owing to laser is coherent light, therefore, when use laser as light
Speckle phenomena can be produced when source projects on screen, have a strong impact on the quality of projection picture.Based on this, as
One of what suppression speckle important research direction having become as laser projection field.
At present, mostly pressed down by polarization diversity, motion screen, wavelength multiformity or angular diversity
The speckle that LASER Light Source processed produces.Owing to LASER Light Source has wavelength with temperature change, i.e. temperature
The highest, wavelength is the longest, therefore, it can realize wavelength multiformity by the temperature controlling LASER Light Source,
And then speckle can be suppressed by wavelength multiformity.
In prior art, control the control device of LASER Light Source temperature as it is shown in figure 1, include thermoelectric refrigerator
101, critesistor 102 and controller 103, wherein, LASER Light Source 100 may be installed thermoelectric refrigerator 101
On, controlled the temperature of LASER Light Source 100 by thermoelectric refrigerator 101, by critesistor 102 by laser light
The actual temperature in source 100 feeds back to controller 103, then controls electricity refrigerator 101 by controller 103,
And then control the actual temperature of LASER Light Source 100 equal to design temperature.Although above-mentioned control device can be accurate
Control the temperature of LASER Light Source, but, aging along with LASER Light Source, wavelength can occur drift, and on
Although stating control device accurately control the temperature of LASER Light Source, but can not accurately control LASER Light Source
Wavelength, therefore, the problem that can not effectively solve LASER Light Source speckle.
Summary of the invention
In view of this, the invention provides a kind of optical projection system, light-source system, light source control device and control
Method processed, to solve can not accurately control laser source wavelength in prior art and can not effectively solve to swash
The problem of radiant speckle.
For achieving the above object, the present invention provides following technical scheme:
A kind of light source control device, is applied to launch the LASER Light Source of laser, including:
Temperature-controlled array, described temperature-controlled array includes that at least one attemperating unit, described attemperating unit are used for controlling
Make the temperature of described LASER Light Source；
First light-dividing device, is arranged in the transmission light path of the laser that described LASER Light Source sends, for
Described laser is divided into detection light and uses up by timesharing or the strong mode of light splitting；
Detection device, is arranged in the transmission light path of described detection light, for detecting the light of described detection light
By force, determine the current wavelength of described LASER Light Source according to described light intensity, produce control according to described current wavelength
Signal processed also sends to described attemperating unit, is controlled the temperature of described LASER Light Source by described attemperating unit
Control the wavelength of described LASER Light Source.
Preferably, described detection device include the second light-dividing device, the first detector, the second detector and
First controller；
Described second light-dividing device for being divided into the first detection light and the second detection light by described detection light；
First light intensity of described first detector the first detection light after detecting device after filtering；
Described second detector is for detecting the second light intensity of described second detection light；
Described first controller is for determining described laser according to the difference of described first light intensity and the second light intensity
The current wavelength of light source, produces control signal according to described current wavelength and sends to described attemperating unit,
The wavelength of described LASER Light Source is controlled with the temperature by the described attemperating unit described LASER Light Source of control.
Preferably, described first light-dividing device is light splitting piece, is used for described laser in the way of light splitting is strong
It is divided into detection light and uses up.
Preferably, described first light-dividing device includes that rotating color wheel, described rotating color wheel along the circumferential direction wrap
Including at least two sectional area, described at least two sectional area includes detecting region and having with light outgoing district
Territory, described detection region is positioned at described laser with light exit area with what the motion of described colour wheel replaced with having
Transmission light path in, in the way of timesharing, described laser is divided into detection light and using up.
Preferably, described laser-bounce is formed described detection light and is incident to described by described detection region
Detection device, described in have with the transmission of light exit area or reflect described laser and be formed and use up.
Preferably, described colour wheel also includes the wavelength conversion region being provided with material for transformation of wave length, described wavelength
Transition region and described detection area coincidence.
Preferably, described colour wheel includes that relative first surface and second surface, described first surface include
Described detection region and use light exit area, described second surface to include described wavelength conversion region, institute
State wavelength conversion region in the position of described second surface and described detection region in the position of described first surface
Put coincidence.
Preferably, described first light-dividing device also includes being set in turn in described LASER Light Source and described colour wheel
Between light path in polarizing beam splitter and phase delay device, wherein:
The luminous reflectance that described polarizing beam splitter has the first polarization state for transmission has the second polarization state
Light, described first polarization state is identical with the polarization state of described laser, described second polarization state and described first
Polarization state is vertical；
Described phase delay device is for being converted to have circular polarization state by the described light with the first polarization state
Light so that described in have described in the light transmission of circular polarization state to have to become with light exit area and use up；Or
There is the light of the second polarization state, so that described polarization divides described in being converted to by the described light with circular polarization state
Light device is by the luminous reflectance of described second polarization state to described detection device.
A kind of light source control method, is applied to the light source control device as above described in any one, including:
In the way of timesharing or light splitting are strong, the laser that LASER Light Source is launched it is divided into detection light and uses up；
Detect the light intensity of described detection light, determine the current wavelength of described LASER Light Source according to described light intensity,
Produce control signal according to described current wavelength and send to described attemperating unit, by described attemperating unit
Control the temperature of described LASER Light Source to control the wavelength of described LASER Light Source.
Preferably, detect the light intensity of described detection light, determine working as of described LASER Light Source according to described light intensity
The process of front wavelength includes:
Described detection light is divided into the first detection light and the second detection light；
Detect the first light intensity of the first detection light after device after filtering and described second detection light respectively
Second light intensity；
Difference according to described first light intensity and the second light intensity determines the current wavelength of described LASER Light Source.
A kind of light-source system, including:
Including the first array of source of at least one the first light source, described first light source is LASER Light Source；
As above the light source control device described in any one, described light source control device is used for controlling described first
The wavelength of the laser that light source is launched；
Including the secondary light source array of at least one secondary light source, described secondary light source is used for launching exciting light；
Rotating color wheel, described rotating color wheel at least includes wavelength conversion region and uses light exit area, institute
State wavelength conversion region for absorbing described exciting light and producing corresponding Stimulated Light；Described use light outgoing
Region is used up described in the transmission or reflection so that described in use up and described Stimulated Light synthesis white light；
Or have described in, and use up and exciting light described in reflecting with light exit area so that described in use up,
Exciting light and described Stimulated Light synthesis white light.
Preferably, described rotating color wheel includes relative first surface and second surface, described first surface
Including detection region and described light exit area of using, described second surface includes described wavelength conversion region,
Described wavelength conversion region in the position of described second surface and described detection region at described first surface
Position overlaps, and wherein said to use up outstanding region be transparent color section, for using up described in transmission.
Preferably, described rotating color wheel between described first array of source and described secondary light source array,
And also including optical filter between described rotating color wheel and described secondary light source array, described optical filter is for thoroughly
Penetrate described exciting light and reflect described Stimulated Light and use up.
Preferably, described first light-dividing device is light splitting piece.
Preferably, described first light-dividing device includes polarizing beam splitter, phase delay device and described rotation color
Wheel；The polarization state of the light that described first light source is launched is identical with the first polarization state；Described polarizing beam splitter is used
In transmission, there is the luminous reflectance of the first polarization state and there is the light of the second polarization state, described second polarization state and institute
State the first polarization state vertical；Described phase delay device is for being converted to the described light with the first polarization state
There is the light of circular polarization state, or there is the second polarization described in being converted to by the described light with circular polarization state
The light of state；Described detection region has the light of circular polarization state described in reflect and forms described detection light also
Be incident to described detection device, described in have with the transmission of light exit area or reflection described in there is circular polarization state
Light and be formed and use up.
Preferably, when described first array of source includes multiple first light source, described light-source system also wraps
Including second controller, described second controller is used for controlling the plurality of first light source and depends within the first period
Secondary unlatching, opened within the second period simultaneously, and described second controller is additionally operable to control described secondary light source
Opening in the first period, close in the second period, wherein, described first period is the rotation of described detection region
Go to the time in the light path of described first light source, described second period be described in have with light exit area revolve
Go to the time in the light path of described first light source.
Preferably, described first light-dividing device is light splitting piece；It is described that to have with light exit area be reflected colour section,
Use up described in reflect and use up described in described exciting light or reflection.
Preferably, described first array of source and described secondary light source array are positioned at the same of described rotating color wheel
The first optical filter and the second filter is also included between side, and described rotating color wheel and described secondary light source array
Wave plate, described first filter plate is for exciting light described in useful luminous reflectance described in transmission, described second filtering
Sheet includes first area and second area, and described first area is used up and exciting light for described in transmission,
Described second area be used for reflecting described in use up, exciting light and Stimulated Light.
Preferably, when described first array of source includes multiple first light source, described light-source system also wraps
Including the 3rd controller, described 3rd controller is used for controlling the plurality of first light source and depends within the first period
Secondary unlatching, opened within the second period simultaneously, and described second controller is additionally operable to control described secondary light source
All open in the first period and the second period.
A kind of optical projection system, it is characterised in that include the light-source system as above described in any one.
Preferably, described light source control device is additionally operable to control described first light source in different periods transmitting not
The laser of co-wavelength.
Compared with prior art, technical scheme provided by the present invention has the advantage that
Optical projection system provided by the present invention, light-source system, light source control device and control method, to divide
Time or light splitting strong mode the laser that LASER Light Source is launched is divided into detection light and uses up, detection is described
Detection light light intensity, determine the current wavelength of described LASER Light Source according to described light intensity, according to described currently
Wavelength produces control signal and sends to described attemperating unit, controls described laser by described attemperating unit
The temperature of light source controls the wavelength of described LASER Light Source such that it is able to accurately control the wavelength of LASER Light Source,
And then can have multiformity eliminate the speckle of projection picture by controlling the wavelength of LASER Light Source.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to reality
Execute the required accompanying drawing used in example or description of the prior art to be briefly described, it should be apparent that below,
Accompanying drawing in description is only embodiments of the invention, for those of ordinary skill in the art, not
On the premise of paying creative work, it is also possible to obtain other accompanying drawing according to the accompanying drawing provided.
Fig. 1 is the structural representation of existing light source control device；
The structural representation of the light source control device that Fig. 2 provides for the embodiment of the present invention one；
The structural representation of the another kind of light source control device that Fig. 3 provides for the embodiment of the present invention one；
Fig. 4 a is the structural representation of the first surface of rotating color wheel in the embodiment of the present invention one；
Fig. 4 b is the structural representation of the second surface of rotating color wheel in the embodiment of the present invention one；
Fig. 5 detects the spectrum schematic diagram of light for the first detection light and second that the embodiment of the present invention one provides；
The light source control method flow chart that Fig. 6 provides for the embodiment of the present invention two；
The structural representation of the light-source system that Fig. 7 provides for the embodiment of the present invention three；
The structural representation of the light-source system that Fig. 8 provides for the embodiment of the present invention four；
The structural representation of the light-source system that Fig. 9 provides for the embodiment of the present invention five.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out
Clearly and completely describe, it is clear that described embodiment is only a part of embodiment of the present invention, and
It is not all, of embodiment.Based on the embodiment in the present invention, those of ordinary skill in the art are not doing
Go out the every other embodiment obtained under creative work premise, broadly fall into the scope of protection of the invention.
Embodiment one
Present embodiments provide a kind of light source control device, be applied to launch the LASER Light Source of laser, including
Temperature-controlled array, the first light-dividing device and detection device, wherein, temperature-controlled array includes that at least one temperature control fills
Putting, this attemperating unit is for controlling the temperature of this LASER Light Source；First light-dividing device is arranged at this laser light
In the transmission light path of the laser that source sends, for laser being divided into detection in the way of timesharing or light splitting are strong
Light and using up；Detection device is arranged in the transmission light path of detection light, including the second light-dividing device, the
One detector, the second detector and the first controller, for the light intensity of detection light, true according to light intensity
Determine the current wavelength of LASER Light Source, produce control signal according to current wavelength and send to attemperating unit, logical
Cross attemperating unit and control the temperature of LASER Light Source to control the wavelength of LASER Light Source.
As in figure 2 it is shown, a kind of light source control device that the present embodiment provides includes having at least one temperature control dress
Put 201 temperature-controlled array, first light-dividing device the 202, second light-dividing device 203, wave filter 204, first
Detector the 205, second detector 206 and the first controller 207.
Wherein, attemperating unit 201 is for controlling the temperature of LASER Light Source 200, it is preferred that this attemperating unit
201 is thermoelectric refrigerator；LASER Light Source 200 is launched by the first light-dividing device 202 for the mode that light splitting is strong
Laser λ 0 is divided into detection light λ 1 and has with light λ 2；Second light-dividing device 203, for being divided into the by detection light λ 1
One detection light λ 10 and the second detection light λ 11；First detector 205, is used for detecting after filtering after device 204
First detection light λ 10 the first light intensity；Second detector 206, for the of detection the second detection light λ 11
Two light intensity；First controller 207, for determining LASER Light Source according to the difference of the first light intensity and the second light intensity
The current wavelength of 200, produces control signal according to current wavelength and sends to attemperating unit 201, to pass through
Attemperating unit 201 controls the temperature of LASER Light Source 200 and is equal to preset temperature, controls the ripple of LASER Light Source 200
Long equal to preset wavelength.
In the present embodiment, the first light-dividing device 202 is the light splitting piece of 1:99, the light splitting piece of this 1:99
Being transmissive to the light of 99% as using up, the light of reflection 1% is as detection light, the i.e. first light-dividing device
202 for being divided into detection light and using up in the way of light splitting is strong by laser, and certainly, the present invention also not only limits
In this, in other embodiments, the first light-dividing device 202 in another kind of light source control device is all right
Including rotating color wheel 2020, phase delay device 2021 and polarizing beam splitter 2022, as it is shown on figure 3, partially
Shake beam splitter 2022 and phase delay device 2021 is set in turn in LASER Light Source 200 and rotating color wheel 2020
Between.
Wherein, rotating color wheel 2020 along the circumferential direction includes at least two sectional area, described at least two
Sectional area includes detecting region and using light exit area, and detection region uses light exit area with color with having
The motion of wheel is alternately located in the transmission light path of laser, laser is divided in the way of timesharing detection light and has
Use up.Additionally, rotating color wheel 2020 also includes the wavelength conversion region being provided with material for transformation of wave length, wavelength
Transition region and detection area coincidence.The light that polarizing beam splitter 2022 has the first polarization state for transmission is anti-
Penetrating the light with the second polarization state, described second polarization state is vertical with described first polarization state；Phase delay
Device 2021 for being converted to the light with circular polarization state by the light with the first polarization state, or will have circle
The light of polarization state is converted to the light with the second polarization state.
Specifically, as it is shown on figure 3, rotating color wheel 2020 includes relative first surface A and second surface
B, first surface A and LASER Light Source 200 are positioned at the same side.As shown in fig. 4 a, first surface A includes
Detection region A1 uses light exit area A2 with having, and as shown in Figure 4 b, second surface B includes wavelength convert
Region B1, this wavelength conversion region B1 is in the position of second surface B and detects region at first surface A
Position overlap.
As it is shown on figure 3, after LASER Light Source 200 launches laser λ 0, owing to laser λ 0 has the first polarization
State, therefore, polarizing beam splitter 2022 transmission laser λ 0, phase delay device 2021 will have the first polarization
The laser λ 0 of state is converted to the light with circular polarization state, when the light of circular polarization state incides detection region A1
Time, detection region A1 is reflected back phase delay device 2021, phase delay device 2021 as detection light λ 1
Being converted into the light of the second polarization state, polarizing beam splitter 2022 is by anti-for the detection light λ 1 of the second polarization state
It is incident upon the second light-dividing device 203 to detect；When the light of circular polarization state has incided with light exit area A2
Time, there is the light with light exit area A2 this circular polarization state of transmission as having with light λ 2.
As shown in Figures 2 and 3, have with light λ 2 and detection light λ 1 along different optic path, and, second point
Electro-optical device 203 is positioned in the light path of detection light λ 1.Preferably, the second light-dividing device 203 is the light splitting piece of 1:1,
The light splitting piece of this 1:1 is transmissive to the detection light of 50% as the first detection light, the detection light work of reflection 50%
It is the second detection light.Further, the first detection light λ 10 and the second detection light λ 11 is preferably along different light paths
Transmission, and, wave filter 204 and the first detector 205 are positioned in the light path of the first detection light λ 10, and second
Detector 206 is positioned in the light path of the second detection light λ 11.
Wherein, the wavelength X that the first detector 205 and the second detector 206 detect and the spectrogram of light intensity P
As it is shown in figure 5, when the wavelength of LASER Light Source is λ 0, the difference of the first light intensity and the second light intensity is P1, as
Really the wavelength of this LASER Light Source changes, and the difference of the first light intensity and the second light intensity also can change therewith,
Such as, when the wavelength of LASER Light Source is λ 4, the difference of the first light intensity and the second light intensity is P4.According to this
One characteristic, can determine the current wavelength of LASER Light Source, then by the difference of the first light intensity and the second light intensity
Produce control signal according to current wavelength and preset wavelength and send to attemperating unit, to be filled by temperature control
Put and carry out heating or freezing, control the wavelength of LASER Light Source equal to preset wavelength.
The light source control device that the present embodiment provides, launches LASER Light Source in the way of timesharing or light splitting are strong
Laser be divided into detection light and using up, detection light is divided into the first detection light and second and detects light, according to
The first light intensity of the first detection light and the difference of the second the second light intensity detecting light after device determine after filtering
The current wavelength of described LASER Light Source, produces control signal according to described current wavelength and sends to described temperature
Control device, controls the wavelength of described LASER Light Source equal to pre-with the temperature by controlling described LASER Light Source
If wavelength such that it is able to accurately control the wavelength of LASER Light Source, and then can be by controlling LASER Light Source
Wavelength has multiformity to eliminate speckle.
Embodiment two
Present embodiments provide a kind of light source control method, be applied to the light source control that above-described embodiment provides
Device, the flow chart of the method as shown in Figure 6, including:
S401: in the way of timesharing or light splitting are strong, the laser that LASER Light Source is launched is divided into detection light and useful
Light；
After LASER Light Source launches laser, the first light-dividing device reflects a part of light transmission another part light, i.e.
Laser is divided into detection light and uses up.Preferably, the first light-dividing device is the light splitting piece of 1:99, with light splitting
Laser is divided into detection light and uses up by strong mode, and wherein detecting light and have the ratio used up is 1:99, but
The present invention is not limited to this, and the first light-dividing device can include polarizing beam splitter, phase in other embodiments
Position delayer and rotating color wheel, now, the mode of the first light-dividing device timesharing laser is divided into detection light and
Use up.
S402: described detection light is divided into the first detection light and the second detection light；
By the second light-dividing device, detection light is divided into the first detection light and second and detects light, wherein, second
Light-dividing device is the light splitting piece of 1:1, and the ratio of the i.e. first detection light and the second detection light is 1:1, but the present invention
It is not limited to that.
S403: detect the first light intensity of the first detection light after device after filtering and described second inspection respectively
Second light intensity of light-metering；
The first light intensity of the first detection light after device after filtering is detected, by second by the first detector
Second light intensity of detector detection the second detection light.
S404: work as prewave according to what the difference of described first light intensity and the second light intensity determined described LASER Light Source
Long；
When the wavelength of LASER Light Source changes, the difference of the first light intensity and the second light intensity also can become
Change, therefore, the first light intensity that the first controller can record according to the first detector and the second detector and
The difference of the second light intensity determines the current wavelength of LASER Light Source.
S405: produce control signal according to described current wavelength and preset wavelength and send to described temperature control dress
Put, with the temperature by the described attemperating unit described LASER Light Source of control equal to preset temperature, control institute
State the wavelength of LASER Light Source equal to preset wavelength.
After determining the current wavelength of LASER Light Source, control can be produced according to current wavelength and preset wavelength
Signal processed also sends to attemperating unit, to carry out heating or freezing by attemperating unit, controls laser light
The wavelength in source is equal to preset wavelength.
The light source control method that the present embodiment provides, it is possible to accurately control the wavelength of LASER Light Source, energy simultaneously
Enough wavelength by control LASER Light Source have multiformity and eliminate speckle.
Embodiment three
Present embodiments providing a kind of light-source system, this light-source system includes the first array of source, light source control
Device processed, secondary light source array and rotating color wheel.
As it is shown in fig. 7, the first array of source includes at least one first light source 5010, and each first light source
5010 are all arranged on an attemperating unit 5020, to control the first light source 5010 by attemperating unit 5020
Temperature.Wherein, the first light source 5010 is LASER Light Source, for example, it is possible to be HONGGUANG, green glow or green light
Deng LASER Light Source.Further, the laser that the first light source 5010 is launched can be directly incident on the first light-dividing device
On 5021, it is also possible to reflexed on the first light-dividing device 5021 by reflecting mirror 5011.
Light source control device in the present embodiment is with the light source control device shown in Fig. 2 in embodiment one substantially
Identical, including attemperating unit the 5020, first light-dividing device the 5021, second light-dividing device 5022, wave filter
5023, the first photodetector the 5024, second photodetector 5025 and the first controller 5026, this light source control
The wavelength of the laser that device processed is launched for control the first light source 5010, and by controlling the first light source 5010
Wavelength multiformity eliminate projection speckle, improve the quality of projection picture.Wherein, the first light-dividing device
5021 are preferably light splitting piece, the laser λ 0 that the first light source 5010 is launched can be divided in the way of light splitting is strong inspection
Light-metering λ 1 uses light λ 2 with having.
Secondary light source array includes at least one secondary light source 5030, and this secondary light source 5030 excites for transmitting
The light source of light λ 3, is preferably the LASER Light Source launching blue light.As it is shown in fig. 7, the first light source 5010 and second
Light source 5030 lays respectively at the both sides of rotating color wheel, and having that the first light source 5010 is launched incides rotation with light λ 2
The first surface A of annesl wheel 504, the exciting light λ 3 that secondary light source 5030 is launched incide rotating color wheel 504
Second surface B, wherein, first surface A and second surface B is two surfaces that rotating color wheel 504 is relative.
Further, also having optical filter 505 between secondary light source 5030 and rotating color wheel 504, this optical filter 505 is used for
Transmission secondary light source 5030 launch exciting light λ 3 and reflect rotating color wheel 504 produce three primary colours light RGB
With having with light λ 2 of transmission.
In the present embodiment, identical with the structure shown in Fig. 4 a and 4b, the first surface A bag of rotating color wheel 504
Including detection region A1 and use light exit area A2 with having, second surface B includes wavelength conversion region B1, wherein,
Wavelength conversion region B1 overlaps in the position of first surface A with detection region A1 in the position of second surface B,
Wavelength conversion region B1 is for absorbing the exciting light λ 3 of secondary light source 5030 transmitting and producing corresponding primary colours
Light, has with light exit area A2 for being transmitted with light λ 2, closes with light λ 2 and primary lights RGB so that this has
Become white light.Wherein, this rotating color wheel 504 also includes driving means, such as motor etc., to drive rotating color wheel
504 along central axis.
Preferably, wavelength conversion region B1 includes red light color section R, green light color section G and blue light color section B, red
Photochromic section of R has red light fluorescent powder, produces primary lights HONGGUANG R, green light color section G after being used for absorbing exciting light
Having green light fluorescent powder, produce primary lights green glow G after being used for absorbing exciting light, blue light color section B has blue light
Fluorescent material, produces primary lights blue light B after being used for absorbing exciting light.But, the present invention is not limited to this,
Wavelength conversion region B1 can also include gold-tinted color section Y and blue light color section B in other embodiments.
Additionally, the light-source system in the present embodiment also includes second control device, this second control device is used
Open successively within the first period in controlling the first light source 5010, open within the second period, simultaneously simultaneously
This second control device is additionally operable to control secondary light source 5030 and opens in the first period, closes in the second period,
Wherein, the first period was that detection region A1 rotation is to the time having in the light path using light λ 2, the second period
Have and rotate to having with the time in the light path of light λ 2 with light exit area A2.
In the first period, i.e. when detecting region A1 and rotating to the light path having with light λ 2, detect region A1
Can not be transmitted with and use light λ 2, now, second controller controls the first light source 5010 and opens successively, and first
The laser that first light source 5010 is launched is divided into by light-dividing device 5021 to be had with light λ 2 and detection light λ 1, the most right
The wavelength of detection light λ 1 detects, and concrete detection process is same as the previously described embodiments, does not repeats them here；
Meanwhile, second controller also controls secondary light source 5030 and opens, the exciting light λ 3 that secondary light source 5030 is launched
Red light color section R of wavelength conversion region B1, green light color section G and blue light color is incided after optical filter 505
Producing HONGGUANG R, green glow G and blue light B on section B, HONGGUANG R, green glow G and blue light B are successively by optical filter afterwards
505 reflect and enter follow-up Multiplexing apparatus and projection lens is first-class；
In the second period, i.e. rotate to having with time in the light path of light λ 2 with light exit area A2 when having, second
Controller controls the first light source 5010 and is all turned on, and is had with light λ 2 through having by what light source control device separated
Enter follow-up Multiplexing apparatus after reflecting with the A2 transmission of light exit area and optical filter 505 and projection lens be first-class,
HONGGUANG R, green glow G and the blue light B that produce with the first period synthesize beam of white light, now, second controller
Control secondary light source 5030 to close, to save the energy.
The light-source system that the present embodiment provides, it is possible to accurately control the ripple of the first light source during projection
Long, eliminate speckle by the multiformity of the first optical source wavelength, improve the quality of projection picture, and,
The light-source system that the present embodiment provides, it is possible to by sequentially controlling the unlatching of the first light source and secondary light source
Or close, improve the efficiency of light-source system.
Embodiment four
Present embodiments provide a kind of light-source system, as shown in Figure 8, the light-source system that the present embodiment provides
The light-source system provided with embodiment three is substantially the same, and its difference is, first in the present embodiment
Light-dividing device is roughly the same with the structure of the first light-dividing device shown in Fig. 3, and the i.e. first light-dividing device includes
Polarizing beam splitter 6021, phase delay device 6022 and rotating color wheel 504.
Wherein, the first light source 5010 is the light source of the light launching the first polarization state, wherein, the first polarization state
Light can be that P polarization light can also be for S-polarization light, with the light of the first polarization state as P in the present embodiment
Polarized light illustrates, and in addition, the first light source 5010 can be to launch HONGGUANG, green glow or green light
LASER Light Source；Polarizing beam splitter 6021 is transmissive to the light i.e. P light of the first polarization state, reflection the second polarization
The light of state i.e. S light；The light of the first polarization state i.e. P light can be converted to circular polarization by phase delay device 6022
The light of state, or the light of circular polarization state is converted to the light i.e. S light of the second polarization state, it is preferred that phase place
Delayer 6022 is quarter wave plate.
In the present embodiment, in the first period, second controller controls the first light source 5010 and opens successively.The
The P light that one light source 5010 is launched can be by polarizing beam splitter 6021 transmission, and the P light after transmission is prolonged by phase place
Device 6022 is converted to the light of circular polarization state late.When the light of circular polarization state incides on detection region B1,
The light of circular polarization state is detected region B1 and reflexes to phase delay device 6022 as detection light λ 1, and phase place is prolonged
The light of circular polarization state is converted to S light by device 6022 late, and S light is reflexed to the second light splitting by polarizing beam splitter and fills
Put 6023, carry out the detection of wavelength and control the light of circular polarization state；Now, second controller also controls
Two light sources 5030 are opened, and the exciting light λ 3 that secondary light source 5030 is launched enters after optical filter 505 successively
It is mapped in red light color section R of wavelength conversion region B1, green light color section G and blue light color section B be sequentially generated
HONGGUANG R, green glow G and blue light B, HONGGUANG R, green glow G and blue light B are reflected by optical filter 505 successively
Multiplexing apparatus and projection lens that rear entrance is follow-up are first-class；
In the second period, second controller controls the first light source 5010 and is all turned on, and P light is through polarization spectro
The light of circular polarization state is converted to, when the light of circular polarization state has incided after device 6021 and phase delay device 6022
With on the A2 of light exit area, the light of circular polarization state had with the A2 transmission of light exit area with light λ 2 as having and
Enter follow-up Multiplexing apparatus after optical filter 505 reflection and projection lens is first-class, with HONGGUANG R, green glow G and blue light
B synthesizes light beam, and meanwhile, second controller also controls secondary light source 5030 and closes, to save the energy.
The light-source system that the present embodiment provides, can not only accurately control the first light source during projection
Wavelength, eliminate speckle by the multiformity of the first optical source wavelength, improve the quality of projection picture, and
And, it is possible to by sequentially controlling being turned on and off of the first light source and secondary light source, improve light source system
The efficiency of system, additionally, the laser in first period the first light source transmitting is all converted to detect light,
The laser that second period the first light source is launched all has been converted to use up, thus improves the first light source
Utilization rate.
Embodiment five
Present embodiments provide a kind of light-source system, the light-source system that this light-source system provides with embodiment three
Being substantially the same, its difference is, as it is shown in figure 9, the first light source 5010 and secondary light source 5030
It is positioned between the same side of rotating color wheel 704, and rotating color wheel 704 and secondary light source 5030 and also includes
One optical filter 705 and the second filter plate 706, the first filter plate 706 is used for being transmitted with uses light λ 2 reflection to swash
Luminous λ 3, the second filter plate 706 includes first area and is positioned at the second area of first area surrounding, the
One region is used for being transmitted with uses light λ 2 and exciting light λ 3, and second area has with light λ 2 for reflection, excites
Light λ 3 and primary lights Y.
Additionally, as it is shown in figure 9, wavelength conversion region B1 in rotating color wheel 704 in the present embodiment is
Gold-tinted color section Y, this gold-tinted color section has yellow fluorescent powder, and the present invention is not limited to this certainly, at it
His embodiment can include blue light fluorescent powder and yellow fluorescent powder etc..This yellow fluorescent powder is used for absorbing sharp
Luminous and generation comprises the gold-tinted Y of red primary light and green primary light, and having with light exit area A2 is reflected colour
Section, has with light λ 2 and exciting light λ 3 for reflection, it is preferred that have and can reflect with light exit area A2
Visible ray.
When wavelength conversion region B1 rotates to the light path having with light λ 2 and exciting light λ 3, sometime
In, the i.e. first period, the 3rd controller controls the first light source 5010 and opens successively, carries out wavelength successively
Detection and control, in other times, wavelength conversion region B1 absorbs exciting light λ 3 and produces primary lights i.e. Huang
Light Y, reflection simultaneously has with light λ 2, having with light λ 2, unabsorbed exciting light λ 3 and gold-tinted Y after reflection
Enter follow-up Multiplexing apparatus after being reflected by the second filter plate 706 and projection lens is first-class, wherein, sometime
Duration can be set according to practical situation；
Rotate to when having in the light path using light λ 2 and exciting light λ 3 with light exit area A2 when having, use up out
Penetrate region A2 reflection to have with light λ 2 and exciting light λ 3, having with light λ 2 and exciting light λ 3 by the second filter after reflection
Follow-up Multiplexing apparatus etc. is entered after wave plate 706 reflection；Wherein, the 3rd controller is additionally operable to control the second light
Source 5030 was all opened in the first period and the second period, and the second period referred to that a cycle was interior except the first period
Outside time.In the present embodiment, owing to exciting light λ 3 is blue light, therefore white light can be synthesized with gold-tinted,
Meanwhile, what the first light source 5010 was launched has with light λ 2 can be HONGGUANG, green glow or green light etc..
The light-source system that the present embodiment provides, it is possible to accurately control the ripple of the first light source during projection
Long, eliminate speckle by the multiformity of the first optical source wavelength, improve the quality of projection picture, and,
The light-source system that the present embodiment provides, it is possible to by sequentially controlling the unlatching of the first light source and secondary light source
Or close, improve the efficiency of light-source system.
Embodiment six
The present embodiment provides a kind of optical projection system, and this optical projection system includes the light that any of the above-described embodiment provides
Origin system, the light source control device in this light-source system can control the first light source and launch not at different periods
The laser of co-wavelength such that it is able to eliminate the speckle of the projection picture of this optical projection system.Based on this, this reality
The projection systems project quality executing example offer is higher, and the efficiency of light-source system is the highest.
In this specification, each embodiment uses the mode gone forward one by one to describe, and each embodiment stresses
Being the difference with other embodiments, between each embodiment, identical similar portion sees mutually.
For device disclosed in embodiment, owing to it corresponds to the method disclosed in Example, so describing
Fairly simple, relevant part sees method part and illustrates.
Described above to the disclosed embodiments, makes professional and technical personnel in the field be capable of or uses
The present invention.Multiple amendment to these embodiments will be aobvious and easy for those skilled in the art
See, generic principles defined herein can without departing from the spirit or scope of the present invention,
Realize in other embodiments.Therefore, the present invention is not intended to be limited to the embodiments shown herein,
And it is to fit to the widest scope consistent with principles disclosed herein and features of novelty.
Claims (21)
1. a light source control device, is applied to launch the LASER Light Source of laser, it is characterised in that including:
Temperature-controlled array, described temperature-controlled array includes that at least one attemperating unit, described attemperating unit are used for controlling
Make the temperature of described LASER Light Source；
First light-dividing device, is arranged in the transmission light path of the laser that described LASER Light Source sends, for
Described laser is divided into detection light and uses up by timesharing or the strong mode of light splitting；
Detection device, is arranged in the transmission light path of described detection light, for detecting the light of described detection light
By force, determine the current wavelength of described LASER Light Source according to described light intensity, produce control according to described current wavelength
Signal processed also sends to described attemperating unit, is controlled the temperature of described LASER Light Source by described attemperating unit
Control the wavelength of described LASER Light Source.
Device the most according to claim 1, it is characterised in that described detection device includes second point
Electro-optical device, the first detector, the second detector and the first controller；
Described second light-dividing device for being divided into the first detection light and the second detection light by described detection light；
First light intensity of described first detector the first detection light after detecting device after filtering；
Described second detector is for detecting the second light intensity of described second detection light；
Described first controller is for determining described laser according to the difference of described first light intensity and the second light intensity
The current wavelength of light source, produces control signal according to described current wavelength and sends to described attemperating unit,
The wavelength of described LASER Light Source is controlled with the temperature by the described attemperating unit described LASER Light Source of control.
Device the most according to claim 1, it is characterised in that described first light-dividing device is light splitting
Sheet, for being divided into detection light and using up in the way of light splitting is strong by described laser.
Device the most according to claim 1, it is characterised in that described first light-dividing device includes rotation
Annesl is taken turns, and described rotating color wheel along the circumferential direction includes that at least two sectional area, described at least two divide
Section region includes detecting region and use light exit area, described detection region and having use light exit area with
In the motion of the described colour wheel transmission light path being positioned at described laser alternately, swash described in the way of timesharing
Light is divided into detection light and uses up.
Device the most according to claim 4, it is characterised in that described detection region is by described laser
Reflection and form described detection light and be incident to described detection device, described in have with the transmission of light exit area or
Person is reflected described laser and is formed and uses up.
Device the most according to claim 5, it is characterised in that described colour wheel also includes being provided with wavelength
The wavelength conversion region of transition material, described wavelength conversion region and described detection area coincidence.
Device the most according to claim 6, it is characterised in that described colour wheel includes relative first
Surface and second surface, described first surface includes described detection region and uses light exit area, described
Second surface includes described wavelength conversion region, and described wavelength conversion region is in the position of described second surface
Overlap in the position of described first surface with described detection region.
Device the most according to claim 7, it is characterised in that described first light-dividing device also includes
The polarizing beam splitter being set in turn in the light path between described LASER Light Source and described colour wheel and Phase delay
Device, wherein:
The luminous reflectance that described polarizing beam splitter has the first polarization state for transmission has the second polarization state
Light, described first polarization state is identical with the polarization state of described laser, described second polarization state and described first
Polarization state is vertical；
Described phase delay device is for being converted to have circular polarization state by the described light with the first polarization state
Light so that described in have described in the light transmission of circular polarization state to have to become with light exit area and use up；Or
There is the light of the second polarization state, so that described polarization divides described in being converted to by the described light with circular polarization state
Light device is by the luminous reflectance of described second polarization state to described detection device.
9. a light source control method, is applied to the light source control device described in any one of claim 1-8,
It is characterized in that, including:
In the way of timesharing or light splitting are strong, the laser that LASER Light Source is launched it is divided into detection light and uses up；
Detect the light intensity of described detection light, determine the current wavelength of described LASER Light Source according to described light intensity,
Produce control signal according to described current wavelength and send to described attemperating unit, by described attemperating unit
Control the temperature of described LASER Light Source to control the wavelength of described LASER Light Source.
Method the most according to claim 9, it is characterised in that detect the light intensity of described detection light,
Determine that according to described light intensity the process of the current wavelength of described LASER Light Source includes:
Described detection light is divided into the first detection light and the second detection light；
Detect the first light intensity of the first detection light after device after filtering and described second detection light respectively
Second light intensity；
Difference according to described first light intensity and the second light intensity determines the current wavelength of described LASER Light Source.
11. 1 kinds of light-source systems, it is characterised in that including:
Including the first array of source of at least one the first light source, described first light source is LASER Light Source；
Light source control device described in any one of claim 1-8, described light source control device is used for controlling institute
State the wavelength of the laser that the first light source is launched；
Including the secondary light source array of at least one secondary light source, described secondary light source is used for launching exciting light；
Rotating color wheel, described rotating color wheel at least includes wavelength conversion region and uses light exit area, institute
State wavelength conversion region for absorbing described exciting light and producing corresponding Stimulated Light；Described use light outgoing
Region is used up described in the transmission or reflection so that described in use up and described Stimulated Light synthesis white light；
Or have described in, and use up and exciting light described in reflecting with light exit area so that described in use up,
Exciting light and described Stimulated Light synthesis white light.
12. light-source systems according to claim 11, it is characterised in that described rotating color wheel includes
Relative first surface and second surface, described first surface includes detecting region and described using light outgoing
Region, described second surface includes described wavelength conversion region, and described wavelength conversion region is described second
The position on surface overlaps in the position of described first surface with described detection region, wherein said uses up out
Territory, zone is transparent color section, for using up described in transmission.
13. light-source systems according to claim 12, it is characterised in that described rotating color wheel is positioned at
Between described first array of source and described secondary light source array, and described rotating color wheel and described second light
Also including optical filter between the array of source, described optical filter is for being excited described in exciting light described in transmission reflection
Light and using up.
14. light-source systems according to claim 13, it is characterised in that described first light-dividing device
For light splitting piece.
15. light-source systems according to claim 13, it is characterised in that described first light-dividing device
Including polarizing beam splitter, phase delay device and described rotating color wheel；Light inclined that described first light source is launched
Polarization state is identical with the first polarization state；Described polarizing beam splitter has the luminous reflectance of the first polarization state for transmission
Having the light of the second polarization state, described second polarization state is vertical with described first polarization state；Described phase place is prolonged
Device for being converted to the light with circular polarization state by the described light with the first polarization state late, or by described
Have the light of circular polarization state be converted to described in there is the light of the second polarization state；Described detection region is used for reflecting
The described light with circular polarization state and form described detection light and be incident to described detection device, described useful
Described in the transmission of light exit area or reflection, there is the light of circular polarization state and be formed and use up.
16. according to the light-source system described in claims 14 or 15, it is characterised in that when described first
When array of source includes multiple first light source, described light-source system also includes second controller, described second
Controller is used for controlling the plurality of first light source and opens successively within the first period, same within the second period
Shi Kaiqi, described second controller is additionally operable to control described secondary light source and opens in the first period, second
Period closes, and wherein, described first period is that described detection region rotates the light path to described first light source
On time, described second period be described in have and rotate to the light path of described first light source with light exit area
On time.
17. light-source systems according to claim 11, it is characterised in that described first light-dividing device
For light splitting piece；It is described that to have with light exit area be reflected colour section, be used for reflecting described in use up and swash with described
Use up described in luminescence or reflection.
18. light-source systems according to claim 17, it is characterised in that described first array of source
With the same side that described secondary light source array is positioned at described rotating color wheel, and described rotating color wheel and described
Also including the first optical filter and the second filter plate between two array of source, described first filter plate is used for transmission
Exciting light described in described useful luminous reflectance, described second filter plate includes first area and second area, institute
Stating first area for using up described in transmission and exciting light, described second area is used for reflecting described useful
Light, exciting light and Stimulated Light.
19. light-source systems according to claim 18, it is characterised in that when described first light source battle array
When row include multiple first light source, described light-source system also includes the 3rd controller, described 3rd controller
Open successively within the first period for controlling the plurality of first light source, open within the second period simultaneously,
Described second controller is additionally operable to control described secondary light source and all opens in the first period and the second period.
20. 1 kinds of optical projection systems, it is characterised in that include the light source described in any one of claim 11-19
System.
21. optical projection systems according to claim 20, it is characterised in that described light source control device
It is additionally operable to control described first light source and launches the laser of different wave length at different periods.
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Effective date of registration: 20171013 Address after: 518055 Guangdong city of Shenzhen province Nanshan District Xi Li Light Road No. 1089 Shenzhen integrated circuit design and application of Industrial Park Building 4 Applicant after: APPOTRONICS Corp.,Ltd. Address before: 518055 Guangdong city of Shenzhen province Nanshan District Xi Li Light Road No. 1089 Shenzhen integrated circuit design and application of Industrial Park Building 4 Applicant before: YLX Inc. |
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Address after: 518000 20-22, 20-22 headquarters building, 63 high tech Zone, Xuefu Road, Nanshan District, Guangdong Province, Guangdong. Patentee after: APPOTRONICS Corp.,Ltd. Address before: 518000 Nanshan District, Shenzhen, Guangdong, Guangdong Province, Guangdong Road, 63 Xuefu Road, high-tech zone, 21 headquarters building, 22 floor. Patentee before: SHENZHEN GUANGFENG TECHNOLOGY Co.,Ltd. Address after: 518000 Nanshan District, Shenzhen, Guangdong, Guangdong Province, Guangdong Road, 63 Xuefu Road, high-tech zone, 21 headquarters building, 22 floor. Patentee after: SHENZHEN GUANGFENG TECHNOLOGY Co.,Ltd. Address before: 518055 Shenzhen, Shenzhen, Guangdong 1089 Nanshan District road 1089, Shenzhen integrated circuit design application Industrial Park, 4 floor. Patentee before: APPOTRONICS Corp.,Ltd. |
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