CN101813297B - Light source and method for providing stable emergent light thereof - Google Patents
Light source and method for providing stable emergent light thereof Download PDFInfo
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Abstract
The invention discloses a light source and a method for providing stable emergent light thereof. The light source comprises a light emitting source (1), a drive module of the light emitting source and a color matching device (2) with one or more light wavelength conversion materials; and especially, the drive module comprises a data storage module. The method for providing stable emergent light comprises the following steps of: guiding the light from the light emitting source to be projected onto the color matching device; controlling the movement of the color matching device so as to drive a pre-determined area on the moving surface to periodically and sequentially pass through the projection range of the light; setting at least a compensation data with length of the period in the drive module according to the moving period of the pre-determined area; and synchronously adjusting the power supply for the light emitting source by utilizing the compensation data so as to keep the intensity of the emergent light of the light source stable. By adopting the invention, the problem of relatively large fluctuation range of the output light of the current light source is solved with low cost.
Description
Technical field
The present invention relates to light source, relate in particular to light-source structure and the method for control light source so that stable emergent light to be provided.
Background technology
The light source that tradition is used for projector or special lighting adopts UHP (very-high performance) lamp.Its shortcoming is that the life-span is low, is generally 2000～3000 hours; Can not promptly open promptly and close, the control real-time is poor; Mercurous, not environmental protection; ... or the like.
The appearance of LED and development have overcome above-mentioned shortcoming.
The existing existing light source package that adopts blue-ray LED and yellow fluorescent powder to produce white light.Its deficiency is to lack red spectra part.
In order to be more suitable for the application requirements in field of projection display, light source can adopt red, blue, green three-color LED as light emitting source; Or adopt a monochromatic LED, for example blue-ray LED shines colour wheel as light emitting source, thereby produces red, blue, green sequence light beam.The former has the good advantage of colour rendering these two kinds of schemes, and the latter then cost is lower.
From improving emergent light brightness angle, on above-mentioned prior art basis, occurred again adopting the colour wheel of being with fluorescent material under the monochromatic LED light emitting source, to produce the scheme of polychrome sequence light beam.Above-mentioned employing is red, blue, the scheme emergent light brightness of green three-color LED is compared with this scheme, and brightness will be hanged down more than 30%.But in comparison, this scheme still has the deficiency of emergent light intensity instability, analyzes as follows:
Shown in Fig. 1 principle schematic; When light source adopts general color wheel; General color wheel only plays the filtration of light; The direction of light is not changed, as long as so colour wheel be in the range of exposures (like dotted line light beam 3 ') of the light of self-emitting light source, change (for example by normal A position deviation to the B position) before and after the colour wheel position that colour wheel vibration causes not quite to the influence of emergent light intensity.In addition, based on the optical coating technology of maturation, the employed optical filter of general color wheel is enough to make the colour wheel optical filtering to have the uniformity that meets the requirements.Then situation is different fully but for the colour wheel of being with fluorescent material: at first, fluorescent material is the possibility skewness on colour wheel, comprises that density unevenness is even in uneven thickness; Secondly; In order to improve the brightness of light source emergent light; Require the outgoing beam focusing of light emitting source and concentrate to shine (3 signals of Line beam strictly according to the facts) on the fluorescent material; When colour wheel because of rotating at a high speed shake takes place, will cause the out of focus of colour wheel ad-hoc location (and the fluorescent material that is carried), and then reduce light source emergent light brightness this moment like this excitation beam 3.So the luminous intensity of this light source will be shaken in time fastly and smallly.This light source is used for projecting apparatus, can makes the image that is projected on the screen because of the discontinuous display effect that has a strong impact on of GTG occurring.
Especially when projecting apparatus adopted the DLP technical scheme of TI company, according to the DLP operation principle, image was if want to produce 256 grades of GTGs accurately, and the jitter amplitude of light source intensity can not surpass 0.2%.This is very high requirement.Adopt the light source of the colour wheel of band fluorescent material still can not reach this requirement at present.
Summary of the invention
The technical problem that the present invention will solve is the weak point to above-mentioned prior art, and proposes a kind of light source and method thereof, the emergent light of stabilized intensity can be provided, to satisfy the high-stability requirement in field of image projection or special lighting field.
For solving the problems of the technologies described above; Of the present inventionly be contemplated that basically: with the LED light emitting source is example; Utilize the good advantage of LED control real-time; The position of managing according to colour wheel provides different LED luminous intensity compensation, thus make because of fluorescent material skewness and colour wheel rotate depart from etc. light source emergent light intensity instability problem that multiple factor stack causes disposable obtain correcting solve; Specifically, can make LED keep under the condition of stable output recording light source emergent light intensity variations earlier; Storage and the light output that utilizes this change information to come back-modulation LED make light source light output fluctuation in time can satisfy predetermined requirement.
Technical scheme as realizing the present invention's design is, a kind of method that stable emergent light is provided is provided, and is used to comprise light emitting source and light source with the ager of one or more optical wavelength conversion materials, comprises step:
Guiding projects on the said ager from the light of said light emitting source;
Control said ager motion, the presumptive area that drives on the moving surface is periodically advanced through the projection scope of said light in regular turn; Said presumptive area comprises a subregion that is distributed with said optical wavelength conversion material at least; Especially, also comprise step:
According to the cycle of said presumptive area motion, the offset data of the length at least one said cycle is set in the driver module of said light emitting source;
Utilize said offset data to come adjustment synchronously to offer the power supply source of said light emitting source, thereby pass through the light output intensity of the said light emitting source of real time altering, make the light output intensity fluctuating range of said light source be less than or equal to a predetermined value.
In the such scheme, said ager comprises rolling disc, displacement disc/band or rotary drum.
In the such scheme, said presumptive area comprises the two or more subregions with different light transmission features or different light wavelength conversion characteristics; Said different light wavelength conversion characteristic is through carrying on all subregion or do not carry optical wavelength conversion material, or carries different optical wavelength conversion materials and realize.
In the such scheme, said presumptive area only comprises a said subregion.
In the such scheme, said synchronous performing step comprises: obtain one relevantly with said presumptive area movement position and have the periodic electrical signal of same period, be used as the driver module that synchronizing signal offers said light emitting source; According to said synchronizing signal, this driver module is confirmed in real time the current location of said presumptive area, and confirms the current curtage output valve of said power supply source to drive said light emitting source according to this current location and said offset data.
In the such scheme, said periodic electrical signal is angle or the position coherent signal that is taken from the servomechanism installation of said ager.
In the such scheme, said offset data is to be cured in the driver module of said light emitting source with hardware mode.
In the such scheme, said this light source light output pulsation amplitude of light source monitoring; In case this fluctuating range exceeds said predetermined value, this light source will get into the self compensation pattern and recomputate and upgrade said offset data.
In the such scheme; The acquisition of said offset data comprises step: make the drive current or the driving voltage that offer said light emitting source constant; Light source emergent light intensity P (t) under the light source works state in test and the sampling scheduled time length, this P (t) has periodically; According to said P (t), adjust the fluctuation that said drive current or driving voltage are offset said light source emergent light intensity for corresponding cyclical signal synchronously; The data of said drive current or pairing at least one Cycle Length of driving voltage are said offset data.
In the above-mentioned steps; Said synchronous adjustment is accomplished through the several times iteration by pre-defined algorithm; Comprise step: said light emitting source emergent light intensity E (t) or said drive current or driving voltage during 1. according to said P (t) and this P of acquisition (t); Produce new said light emitting source emergent light intensity E (t) or said drive current or driving voltage by said pre-defined algorithm, new light source emergent light intensity P (t) in the synchronism detection and the scheduled time length of sampling; 2. whether the fluctuating range of judging the P (t) of this time test surpasses said predetermined value, if the P (t) that surpasses then with this time test repeats 1. step; Otherwise, finish said iteration.
As the technical scheme that realizes the present invention's design still, a kind of light source is provided, comprises light emitting source and driver module thereof, with the ager of one or more optical wavelength conversion materials; Said driver module comprises a light source power supply module, and this light source power supply module output driving current or driving voltage are toward said light emitting source; Light from said light emitting source projects on the said ager through first light-guiding system, and this ager has a moving surface, and the presumptive area on this moving surface is advanced through the projection scope of said light with the cycle movement of ager in regular turn; Said presumptive area comprises a subregion that is distributed with said optical wavelength conversion material at least; Especially, said driver module also comprises the data memory module of the offset data of a length of depositing at least one cycle, and this data memory module is exported said offset data toward said light source power supply module; Said ager provides and a periodic electrical signal with same period relevant with said presumptive area movement position to said data memory module, is used as the synchronizing signal of the said offset data of control output.
In the such scheme, the edge of said ager moving surface comprises a projection, and this projection is used as said synchronizing signal with the period of motion property ground light of triggering for generating or the dynamo-electric detection signal of ager.
In the such scheme, said driver module also comprises a self compensation control module; Said light source also comprises an Electro-Optical Sensor Set, and monitoring comes from the light output of said ager, and exports one and feed back signal to said self compensation control module; Said ager also provides said periodic electrical signal to be used as the synchronizing signal of carrying out data to said self compensation control module; Said self compensation module also connects said data memory module, to read or write said offset data.
In the such scheme, the said light output that comes from ager is led toward said Electro-Optical Sensor Set via second light-guiding system.
In the such scheme, said light emitting source is LED.Said optical wavelength conversion material comprises fluorescent material, dyestuff or nano luminescent material.
Adopt above-mentioned each technical scheme, can make light source emergent light stabilized intensity, and implementation cost is lower.
Description of drawings
Fig. 1 is a colour wheel position view in the existing light-source structure;
Fig. 2 is a light-source structure schematic block diagram of the present invention;
Fig. 3 is the embodiment schematic flow sheet of the inventive method;
The light source that Fig. 4 is based on Fig. 2 structure improves structural representation;
Fig. 5 is one of the alternative embodiment of an ager of the present invention sketch map;
Fig. 6 is two sketch mapes of the alternative embodiment of ager of the present invention;
Fig. 7 is the inventive method compensation example schematic;
Wherein, each Reference numeral is: 1---light emitting source, and 2---ager, 22 photoelectric probe, 23 Electro-Optical Sensor Sets; 3,3 '---the light projection scope of light emitting source, 41---coming the light beam/exciting light of self-emitting light source, 42---come from the light beam/stimulated luminescence of ager.
The specific embodiment
Below, further set forth the present invention in conjunction with the most preferred embodiment shown in the accompanying drawing.
The light source of existing known ager with one or more optical wavelength conversion materials generally also comprises light emitting source and driver module thereof; This driver module comprises a light source power supply module, and this light source power supply module output driving current or driving voltage are toward said light emitting source; Said ager has a moving surface, has one can " be strafed " presumptive area of crossing by light with motion on this moving surface; Said presumptive area comprises a subregion that is distributed with said optical wavelength conversion material at least.Said optical wavelength conversion material comprises fluorescent material, dyestuff or nano luminescent material.
This light source provides the method for emergent light to generally comprise: guiding comes the light of self-emitting light source to project the step on the said ager; And control the motion of said ager, drive said presumptive area and periodically advance in regular turn through the step of the projection scope of said light.Said guiding can realize that these are not given unnecessary details at this because of known technology through light-guiding system (for example optical fiber or condenser lens).For making this light source emergent light keep stable, the inventive method has also comprised step: according to the cycle of said presumptive area motion, the offset data of the length at least one said cycle is set in said driver module; Utilize said offset data to come adjustment synchronously to offer the power supply source of said light emitting source, thereby pass through the light output intensity of the said light emitting source of real time altering, make the light output intensity fluctuating range of said light source be less than or equal to a predetermined value.
In the inventive method, said offset data can be cured in the said driver module with hardware mode.This offset data can be confirmed through toning before said light source dispatches from the factory.Therefore ager is example with the colour wheel, when colour wheel is pressed the rotary speed movement of setting in the said light source works process, how to make the ad-hoc location on this offset data and the said presumptive area carry out very crucial synchronously.For this reason, the present invention further proposes to realize said synchronous method, comprises step: obtain one relevantly with said presumptive area movement position and have the periodic electrical signal of same period, be used as synchronizing signal and offer said driver module; According to said synchronizing signal, this driver module is confirmed in real time the current location of said presumptive area, and confirms the current curtage output valve of said power supply source to drive said light emitting source according to this current location and said offset data.
Specifically, can be according to the inventive method, the design light-source structure is as shown in Figure 2.As previously mentioned, this light source comprises light emitting source (1) and driver module thereof, ager (2); The light source power supply module output driving current of said driver module or driving voltage are toward said light emitting source (1); Light from said light emitting source projects on the said ager (2) through first light-guiding system.Especially, said driver module also comprises a data memory module, is used for depositing the offset data of the length in said at least one cycle, and this data memory module is exported said offset data toward said light source power supply module.Said synchronous in order to realize, said ager (2) provides a said periodic electrical signal to said data memory module, is used as the synchronizing signal of the said offset data of control output.Under the situation about confirming in the said ager period of motion, this synchronizing signal will control said data memory module and export in real time in the said offset data and the relevant data in current presumptive area position.
According to this method spirit; If the light-source structure of Fig. 2 is adjusted; Such as but not limited to said periodic electrical signal being offered said light source power supply module; And in this light source power supply module, be provided with one and can select the unit controlling and export to said offset data according to said periodic electrical signal, also can reach the object of the invention.These all should fall into the inventive method protection domain.
Said periodic electrical signal can adopt several different methods and corresponding deriving means to realize that the present invention is under this measure for example:
One of implementation be utilize said ager (2) the servomechanism installation that must have.Said servomechanism installation drives the motion parts (for example colour wheel) of said ager (2) when moving, and can provide a periodic electrical signal relevant with rotational angle or position to be used as said synchronizing signal easily.
Two of implementation can be: in the edge setting of said ager (2) or a projection is installed, this projection is used as said periodic electrical signal with the light or the dynamo-electric detection signal of the period of motion property ground triggering for generating of ager.
Three of implementation can be; As shown in Figure 2; One photoelectric probe (22) is installed outside said ager; On the moving surface of said ager, be provided with in addition or a linear or circular grating chi is installed, thereby this photoelectric probe (22) comes directly to provide said periodic electrical signal through " reading " said grating chi.
Four of implementation can be; One reflection or absorption plant is installed in said ager (2); While static installation one photoemission and receiving system outside ager, the motion of this ager are connected or blocking-up this photoemission and receiving system, to produce said periodic electrical signal.
Five of implementation can be; When there is two or more said subregion in said ager; A photoelectric probe is installed at the edge of the emitting light path outside said ager; The detectivity of this probe changes with the difference of optical wavelength, thereby the variable signal of exporting with this probe of motion of said telecontrol equipment is said periodic electrical signal.
... it is understandable that above-mentioned example is not exhaustive to all modes.
Further be in the inventive method, can come to obtain fast or confirm said offset data according to following step:
At first, formulate or obtain the emergent light intensity of said light emitting source and the variation relation table between drive current or the driving voltage by the specification of light emitting source;
Then, make the emergent light intensity of said light emitting source constant, the light source emergent light intensity P (t) under the light source works state in test and the sampling scheduled time length; This P (t) has periodically, and has reflected that the influence that various factors is applied the light source light output stability, these factors have comprised that said optical wavelength conversion material skewness and said moving surface depart from because of the front and back, position that motion causes;
Then, according to said P (t), the emergent light intensity E (t) that adjusts said light emitting source synchronously offsets said light source emergent light intensity because of fluctuation that above-mentioned multiple factor caused for corresponding cyclical signal;
At last; Under the prerequisite that said fluctuation obtains offsetting; According to the emergent light intensity E (t) of said light emitting source, utilize said variation relation table to inquire about or interpolation produces the said drive current or the driving voltage data of at least one Cycle Length, as said offset data.
Because the emergent light intensity E (t) of said light emitting source is decided by drive current that offers this light emitting source or driving voltage, in fact said process can further be reduced to and only comprise step:
Make the drive current or the driving voltage that offer said light emitting source constant, the light source emergent light intensity P (t) under the light source works state in test and the sampling scheduled time length, same, this P (t) has periodically;
According to said P (t), adjust the fluctuation that said drive current or driving voltage are offset said light source emergent light intensity for corresponding cyclical signal synchronously; The data of said drive current or pairing at least one Cycle Length of driving voltage are said offset data.
The essence according to the present invention; Said drive current or driving voltage can also replace with other physical quantity and parameter thereof; For example be used for realizing the adjustable resistance that drive current or driving voltage are regulated, or be used for modulating the modulation signal of drive current or driving voltage realization size variation; Or use digital to analog converter to replace, convert said offset data to control by data signal through control conversion multiple and use analog signal.... these all should fall into protection domain of the present invention.The intensity output that can control E (t) through the input current I (t) of excitation source changes.
Can expect that because other non-linear factor that the nonlinear optical wavelength conversion characteristic of material for transformation of wave length and light-source system exist, above-mentioned synchronous adjustment is not through once attempting just reaching said neutralization effect most probably.For this reason, the present invention also proposes to accomplish by pre-defined algorithm process several times iteration the method for said synchronous adjustment, comprises step:
Said light emitting source emergent light intensity E (t) or said drive current or driving voltage during 1. according to said P (t) and this P of acquisition (t); Produce new said light emitting source emergent light intensity E (t) or said drive current or driving voltage by said pre-defined algorithm, new light source emergent light intensity P (t) in the synchronism detection and the scheduled time length of sampling;
2. whether the fluctuating range of judging the P (t) of this time test surpasses said predetermined value, if the P (t) that surpasses then with this time test repeats 1. step; Otherwise, finish said iteration.
In conjunction with flow chart shown in Figure 3, the acquisition and the compensation process thereof of offset data according to the invention are set forth as follows so that most preferred embodiment is concrete:
Light emitting source is provided under the condition of a constant output light intensity move light source module, measure in a period of time the light output P (t) of (Δ t representes with the period, down with) light source; Said period Δ t is not shorter than a period of motion of said presumptive area; If this moment, what offer said light emitting source was the constant current of 1.5A electric current, exporting light with the light source that obtains as curve is an example above Fig. 7 is example (the light intensity example is unit with the milliwatt);
Then, according to P (t) and said constant E (t), utilization pre-defined algorithm λ obtains new light emitting source light intensity output E (t)=λ (P (t), E (t)); As the light output condition of said light emitting source in next period Δ t, come synchro measure the light source light in the period to export P (t) and to measure P (t) ' over time this light intensity;
Judge whether said P (t) ' satisfies display requirement;
If then transfer and finish.The sampled data that light emitting source output intensity E (t) in this period is corresponding is stored as offset data; Or look into said variation relation table according to the sampled data of this output intensity; Obtain the offset data represented with drive current through inquiry or interpolation; For example a curve is the drive current shown in the example (is unit with the ampere) below Fig. 7, and the fluctuation direction of this electric current will be opposite with a top curve;
If not, then utilize light emitting source output intensity E (t) and light source output P (t) in this period to carry out said iteration.
In the foregoing description, said pre-defined algorithm can carry out different choice according to the individual difference of light emitting source.
For example can select one of embodiment to do
Wherein, E (t) and P (t) are that the light emitting source output in the last period Δ t is exported with light source, and Max (P (t)) is the maximum of P (t) wherein; E ' is revised light emitting source output (t), the light output that just light emitting source will provide in the Δ t of current period.Like this, the light source largest light intensity in the above period just is output as reference, and the pairing current light emitting source light in amplification other position of presumptive area is exported and implemented said counteracting.
Can select two of embodiment to do
Wherein the implication of each physical quantity is the same, and Min (P (t)) is the minimum of a value of P (t).Like this, the light source minimum intensity of light in the above period just is output as reference, and the pairing current light emitting source light in reduction other position of presumptive area is exported and implemented said counteracting.
Can select three of embodiment to do
Wherein the implication of each physical quantity is the same, and Aver (P (t)) is the mean value of P (t).
In said iterative process, the pre-defined algorithm in each time period can be fixed as with a kind of, also can be adjusted into the employing algorithms of different; As long as said optical source colour-adjusting apparatus, light emitting source can operate as normal, the algorithm total energy convergence in the foregoing description makes the light source light output after transferring keep stable.
In view of light source in long-term use, instability possibly take place having because of reason such as aging causes light source output in said one or more optical wavelength conversion materials once more under the compensation situation, the present invention also proposes for said light source a self compensation mode of operation to be set.For this reason, the present invention is modified into light-source structure shown in Figure 2 as shown in Figure 4: said driver module also comprises a self compensation control module; Said light source also comprises an Electro-Optical Sensor Set (23), and monitoring comes from the light output of said ager (2), and exports one and feed back signal to said self compensation control module; Said ager (2) also provides said periodic electrical signal to be used as the synchronizing signal of carrying out data to said self compensation control module; Said self compensation module also connects said data memory module, to read and write said offset data.Like this, in the methods of the invention, also comprise the step of said light source monitoring light source light output pulsation amplitude.In this step, in case confirmed that through said feedback signal said smooth output pulsation amplitude exceeds said predetermined value, light source will be forced into the self compensation pattern, said offset data is recomputated and upgrade.In this self compensation pattern, said light source will write said data memory module with this offset data after will using above-mentioned iterative process to obtain offset data voluntarily, withdraw from said self compensation pattern again.
The said light output that comes from ager (2) can also be led toward said Electro-Optical Sensor Set (23) via second light-guiding system.Said second light-guiding system can comprise lens or other photocon.
In the present invention, said ager can comprise rolling disc (for example colour wheel), or comprises rotary drum as shown in Figure 5, or comprises displacement disc as shown in Figure 6 or moving belt.In Fig. 5 or Fig. 6, come the light 41 of self-emitting light source to penetrate behind the moving surface of said ager, stimulated luminescence 42 can penetrate light source through transmission or the form that is reflected.Illustrated direction arrow has been represented the rotation direction of said rotary drum or the moving direction of displacement disc.
In the embodiment of Fig. 5 or Fig. 6, said presumptive area can comprise the two or more subregions with different light transmission features or different light wavelength conversion characteristics; Said different light wavelength conversion characteristic is through carrying on all subregion or do not carry optical wavelength conversion material, or carries different optical wavelength conversion materials and realize.Among a, b, c three sub regions that for example diagram is cut apart, can have one not carry optical wavelength conversion material, two carry different optical wavelength conversion materials in addition; Maybe can be three and carry different optical wavelength conversion materials respectively; Maybe can be one and carry optical wavelength conversion material that two do not carry optical wavelength conversion material but have different light transmission features in addition.In the specific occasion, also allow said presumptive area only to comprise a said subregion, just ager only is with a kind of optical wavelength conversion material.
In order to cooperate the high-speed motion of ager, light emitting source described in the present invention preferably adopts LED, does not use the good light emitting semiconductor device of other control real-time, for example laser diode but also do not get rid of.
The present invention has improved the stability of light source emergent light greatly through verification experimental verification.
Claims (26)
1. method that stable emergent light is provided is used to comprise light emitting source and light source with the ager of one or more optical wavelength conversion materials, comprises step:
Guiding projects on the said ager from the light of said light emitting source;
Control said ager motion, the presumptive area that drives on the moving surface is periodically advanced through the projection scope of said light in regular turn; Said presumptive area comprises a subregion that is distributed with said optical wavelength conversion material at least; It is characterized in that, also comprise step:
According to the cycle of said presumptive area motion, the offset data of the length at least one said cycle is set in the driver module of said light emitting source;
Utilize said offset data to come adjustment synchronously to offer the power supply source of said light emitting source, thereby pass through the light output intensity of the said light emitting source of real time altering, make the light output intensity fluctuating range of said light source be less than or equal to a predetermined value.
2. according to the said method that stable emergent light is provided of claim 1, it is characterized in that:
Said ager comprises rolling disc, displacement disc/band or rotary drum.
3. according to the said method that stable emergent light is provided of claim 1, it is characterized in that:
Said presumptive area comprises the two or more subregions with different light transmission features or different light wavelength conversion characteristics; Said different light wavelength conversion characteristic is through carrying on all subregion or do not carry optical wavelength conversion material, or carries different optical wavelength conversion materials and realize.
4. according to the said method that stable emergent light is provided of claim 1, it is characterized in that:
Said presumptive area only comprises a said subregion.
5. according to the said method that stable emergent light is provided of claim 1, it is characterized in that:
Said light emitting source adopts LED.
6. according to the said method that stable emergent light is provided of claim 1, it is characterized in that:
Said optical wavelength conversion material comprises fluorescent material, dyestuff or nano luminescent material.
7. according to the said method that stable emergent light is provided of claim 1, it is characterized in that said synchronous performing step comprises:
Obtain one relevantly with said presumptive area movement position and have the periodic electrical signal of same period, be used as the driver module that synchronizing signal offers said light emitting source;
According to said synchronizing signal, this driver module is confirmed in real time the current location of said presumptive area, and confirms the current curtage output valve of said power supply source to drive said light emitting source according to this current location and said offset data.
8. according to the said method that stable emergent light is provided of claim 7, it is characterized in that:
Said periodic electrical signal is angle or the position coherent signal that is taken from the servomechanism installation of said ager.
9. according to the said method that stable emergent light is provided of claim 7, it is characterized in that:
At the edge of said ager one projection is installed, this projection is said periodic electrical signal with the light or the dynamo-electric detection signal of the period of motion property ground triggering for generating of ager.
10. according to the said method that stable emergent light is provided of claim 7, it is characterized in that:
One reflection or absorption plant is installed in said ager, while static installation one photoemission and receiving system outside ager, the motion of this ager is connected or blocking-up this photoemission and receiving system, to produce said periodic electrical signal.
11., it is characterized in that according to the said method that stable emergent light is provided of claim 7:
A photoelectric probe is installed at the edge of the emitting light path outside said ager, and the detectivity of this probe changes with the difference of optical wavelength, thereby the variable signal of exporting with this probe of motion of said telecontrol equipment is said periodic electrical signal.
12., it is characterized in that according to the said method that stable emergent light is provided of claim 7:
One linear or circular grating chi is installed in said ager, a photoelectric probe is installed outside said ager, thereby directly provides said periodic electrical signal through " reading " this grating chi.
13., it is characterized in that according to claim 1 or the 7 said methods that stable emergent light is provided:
Said offset data is to be cured in the driver module of said light emitting source with hardware mode.
14. according to the said method that stable emergent light is provided of claim 1, it is characterized in that, also comprise step:
Said this light source light output pulsation amplitude of light source monitoring; In case this fluctuating range exceeds said predetermined value, this light source will get into the self compensation pattern and recomputate and upgrade said offset data.
15., it is characterized in that the acquisition of said offset data comprises step according to the said method that stable emergent light is provided of claim 1:
Obtain or formulate the emergent light intensity of light emitting source and the variation relation table between drive current or the driving voltage;
Make the emergent light intensity of said light emitting source constant, the light source emergent light intensity P (t) under the light source works state in test and the sampling scheduled time length, this P (t) has periodically;
According to said P (t), the emergent light intensity E (t) that adjusts said light emitting source synchronously is the fluctuation that corresponding cyclical signal is offset said light source emergent light intensity;
According to the emergent light intensity E (t) of said light emitting source, utilize said variation relation table to inquire about or interpolation produces the said drive current or the driving voltage data of at least one Cycle Length, as said offset data.
16., it is characterized in that the acquisition of said offset data comprises step according to the said method that stable emergent light is provided of claim 1:
Make the drive current or the driving voltage that offer said light emitting source constant, the light source emergent light intensity P (t) under the light source works state in test and the sampling scheduled time length, this P (t) has periodically;
According to said P (t), adjust the fluctuation that said drive current or driving voltage are offset said light source emergent light intensity for corresponding cyclical signal synchronously; The data of said drive current or pairing at least one Cycle Length of driving voltage are said offset data.
17., it is characterized in that said synchronous adjustment is accomplished through the several times iteration by pre-defined algorithm, comprises step according to claim 15 or the 16 said methods that stable emergent light is provided:
Said light emitting source emergent light intensity E (t) or said drive current or driving voltage during 1. according to said P (t) and this P of acquisition (t); Produce new said light emitting source emergent light intensity E (t) or said drive current or driving voltage by said pre-defined algorithm, new light source emergent light intensity P (t) in the synchronism detection and the scheduled time length of sampling;
2. whether the fluctuating range of judging the P (t) of this time test surpasses said predetermined value, if the P (t) that surpasses then with this time test repeats 1. step; Otherwise, finish said iteration.
18. a light source comprises light emitting source (1) and driver module thereof, with the ager (2) of one or more optical wavelength conversion materials; Said driver module comprises a light source power supply module, and this light source power supply module output driving current or driving voltage are toward said light emitting source (1); Light from said light emitting source projects on the said ager (2) through first light-guiding system, and this ager has a moving surface, and the presumptive area on this moving surface is advanced through the projection scope of said light with the cycle movement of ager in regular turn; Said presumptive area comprises a subregion that is distributed with said optical wavelength conversion material at least; It is characterized in that:
Said driver module also comprises the data memory module of the offset data of a length of depositing at least one cycle, and this data memory module is exported said offset data toward said light source power supply module;
Said ager (2) provides and a periodic electrical signal with same period relevant with said presumptive area movement position to said data memory module, is used as the synchronizing signal of the said offset data of control output.
19. light source according to claim 18 is characterized in that:
The servomechanism installation of said ager (2) provides an angle or position coherent signal to be used as said synchronizing signal to said light source power supply module.
20. light source according to claim 18 is characterized in that:
The edge of said ager moving surface comprises a projection, and this projection is used as said synchronizing signal with the period of motion property ground light of triggering for generating or the dynamo-electric detection signal of ager.
21. light source according to claim 18 is characterized in that:
Comprise a linear or circular grating chi on the moving surface of said ager, a photoelectric probe (22) is installed outside said ager, this photoelectric probe (22) provides said synchronizing signal through " reading " said grating chi.
22. light source according to claim 18 is characterized in that:
Said driver module also comprises a self compensation control module; Said light source also comprises an Electro-Optical Sensor Set (23), and monitoring comes from the light output of said ager (2), and exports one and feed back signal to said self compensation control module; Said ager (2) also provides said periodic electrical signal to be used as the synchronizing signal of carrying out data to said self compensation control module; Said self compensation module also connects said data memory module, with the said offset data of read/write.
23. light source according to claim 22 is characterized in that:
The said light output that comes from ager (2) is led toward said Electro-Optical Sensor Set (23) via second light-guiding system.
24. light source according to claim 18 is characterized in that:
Said ager (2) comprises rolling disc, displacement disc or rotary drum.
25. light source according to claim 18 is characterized in that:
Said light emitting source (2) is LED.
26. light source according to claim 18 is characterized in that:
Said optical wavelength conversion material comprises fluorescent material, dyestuff or nano luminescent material.
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| CN102751657B (en) * | 2012-06-28 | 2013-10-30 | 华东师范大学 | Laser source system based on accurate and adjustable digital microlens device light intensity |
| CN107102505B (en) * | 2017-04-27 | 2020-04-03 | 苏州佳世达光电有限公司 | Projector light source system, control method and projector device |
| CN107228859A (en) * | 2017-05-23 | 2017-10-03 | 昆山国显光电有限公司 | Optical system and automated optical detection equipment |
| CN109883977B (en) * | 2019-03-26 | 2020-06-19 | 翼捷安全设备（昆山）有限公司 | Self-compensation infrared black body light source and compensation method |
| CN111983879A (en) | 2019-05-24 | 2020-11-24 | 中强光电股份有限公司 | Optical element and projection device |
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