CN101119607A - Light source device, lighting and driving method thereof and projector - Google Patents
Light source device, lighting and driving method thereof and projector Download PDFInfo
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- CN101119607A CN101119607A CN 200710139771 CN200710139771A CN101119607A CN 101119607 A CN101119607 A CN 101119607A CN 200710139771 CN200710139771 CN 200710139771 CN 200710139771 A CN200710139771 A CN 200710139771A CN 101119607 A CN101119607 A CN 101119607A
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Abstract
A light source device (41), including: a high pressure discharge lamp (4111) in which an electric discharge is generated between a pair of electrodes (4111A); a lighting device (5) that supplies drive current having a predetermined frequency to the high pressure discharge lamp to light and drive the high pressure discharge lamp; and a control device (6) that controllably drives the lighting device, the control device including: a power-change controller (61) that controls drive power supplied from the lighting device to the high pressure discharge lamp to be changeable at least between a first power and a second power lower than the first power; and a frequency-change controller (62) that controls a frequency of the drive current supplied from the lighting device (5) to the high pressure discharge lamp (4111) to be changeable, in a second power drive mode in which the second power is supplied to the high pressure discharge lamp by the power-change controller, the frequency-change controller changing the frequency of the drive power to a frequency higher than a frequency in a first drive mode in which the first power is supplied to the high pressure discharge lamp by the power-change controller.
Description
Technical field
The present invention relates to the lighting and driving method and the projector of light supply apparatus, light supply apparatus.
Background technology
In the past, following light supply apparatus had been well-known, and this light supply apparatus possesses: high-pressure discharge lamp, discharge between pair of electrodes; Lamp device is supplied with drive current (alternating current) to high-pressure discharge lamp, makes high-pressure discharge lamp light driving; And control device, lamp device is carried out drive controlling.
In this light supply apparatus,, then form projection as the discharge starting point (below, record is the 1st projection) at the electrode front end of high-pressure discharge lamp if high-pressure discharge lamp has been carried out lighting driving with the drive current of lower frequency.In addition,, just can prevent the electrode front end loss of high-pressure discharge lamp, can seek the long lifetime of high-pressure discharge lamp so long as thisly light driving.
But, there is following such problem in the driving process lighting of this high-pressure discharge lamp, promptly the electrode temperature of high-pressure discharge lamp is generally lower, even formed the 1st projection, then the position of electric arc produces and moves, and can't seek the stabilisation of electric arc, and so-called flicker takes place.In addition, even if high-pressure discharge lamp is being lighted when driving with smaller driving power, the electrode temperature that has high-pressure discharge lamp too is general lower and the problem of above-mentioned flicker takes place.
And, be purpose to suppress flicker, the technology (for example, referring to document: the spy opens the 2005-227748 communique) below having proposed.
With regard to the described technology of above-mentioned document, when change appears in the discharge voltage of high-pressure discharge lamp, the size and the frequency thereof of the driving power of supplying with high-pressure discharge lamp are all increased.And the size of the driving power by making high-pressure discharge lamp and frequency thereof increase, and increase the temperature of gas in the high-pressure discharge lamp, suppress the change (flicker) of discharge position in the high-pressure discharge lamp.
, as the occurrence cause of flicker, except above-mentioned electrode temperature low, can also enumerate owing on electrode, form the reason that causes with the 1st protruding different useless projection (below, record is the 2nd projection).
For example, when the frequency ratio of the drive current of supplying with high-pressure discharge lamp was higher, it is even that the Temperature Distribution of electrode surface becomes.And, if the Temperature Distribution of electrode surface becomes evenly like this, then on electrode, be easy to form and the 2nd different projection of the 1st projection.Like this, when having formed the 2nd projection on electrode, the lonely starting point of electricity moves to the 1st or the 2nd projection, glimmers.
With regard to the described technology of above-mentioned document, all increase by size and the frequency thereof that makes the driving power of supplying with high-pressure discharge lamp, and can to suppress lowly be the flicker of reason with electrode temperature.But, for the described technology of above-mentioned document, owing to the size and the frequency thereof of the driving power of supplying with high-pressure discharge lamp are all increased, thereby be easy to form the 2nd projection on electrode, can't avoid to form 2nd projection different with the 1st projection on electrode is the flicker of reason.
In addition, with regard to the described technology of above-mentioned document,, that is to say the drive current than higher frequency is supplied with high-pressure discharge lamp because the size and the frequency thereof of the driving power of supplying with high-pressure discharge lamp are all increased, thereby cause the loss of electrode front end, can not seek the long lifetime of high-pressure discharge lamp.
Thereby people expect a kind ofly can seek the long lifetime of high-pressure discharge lamp and the technology that can suppress to glimmer.
Summary of the invention
Main purpose of the present invention is to provide the lighting and driving method and the projector of the long lifetime that can seek high-pressure discharge lamp and the light supply apparatus that can suppress to glimmer, light supply apparatus.
Light supply apparatus of the present invention possesses: high-pressure discharge lamp, carry out Discharge illuminating between pair of electrodes; Lamp device, the drive current to above-mentioned high-pressure discharge lamp supply preset frequency makes above-mentioned high-pressure discharge lamp light driving; And control device, above-mentioned lamp device is carried out drive controlling; It is characterized by, above-mentioned control device possesses: the power variation control part, control the driving power of supplying with above-mentioned high-pressure discharge lamp from above-mentioned lamp device, and can make it to be altered at least the 1 power and 2nd power littler than above-mentioned the 1st power; With the frequency variation control part, control the frequency of supplying with the drive current of above-mentioned high-pressure discharge lamp from above-mentioned lamp device, can change said frequencies; Said frequencies change control part is altered to the high frequency of frequency when by above-mentioned power variation control part above-mentioned high-pressure discharge lamp being supplied with the 1st power drive of above-mentioned the 1st power with frequency when by above-mentioned power variation control part above-mentioned high-pressure discharge lamp being supplied with the 2nd power drive of above-mentioned the 2nd power.
In the present invention, control device possesses power variation control part and frequency variation control part, when the 1st power drive, make the drive current of the low frequency of the 1st big power of its driving power with than the 2nd power drive time the and the frequency will be than the 2nd power drive the time, supply with high-pressure discharge lamp.Whereby, when the 1st power drive, can be by the 1st power supply high-pressure discharge lamp that will be bigger, the electrode temperature that suppresses high-pressure discharge lamp is low, and the drive current of frequency that can be by will be lower is supplied with high-pressure discharge lamp, is suppressed at and forms the 2nd projection on the electrode.Therefore, when the 1st power drive, can avoid well to suppress flicker with lowly being the flicker of reason and being the flicker both sides of reason of electrode temperature on electrode, to form the 2nd projection.In addition, when the 1st power drive,, can seek the long lifetime of high-pressure discharge lamp because the drive current of frequency that will be lower is supplied with high-pressure discharge lamp, thereby can prevent the electrode front end loss of high-pressure discharge lamp.
; though when the 1st power drive, can well suppress flicker as mentioned above; but when the 2nd power drive; for example when the identical frequency of the frequency by with the 1st power drive the time unchangeably will be than little the 2nd power supply high-pressure discharge lamp of the 1st power; because the frequency ratio of the drive current that high-pressure discharge lamp is supplied with is lower, so can not suppress the decline of electrode temperature.
In the present invention, control device is when the 2nd power drive, and the drive current of the frequency that the 2nd power that the 1st power with than the 1st power drive the time is little and the frequency will be than the 1st power drive the time are high is supplied with high-pressure discharge lamp.Whereby, when the 2nd power drive, by supplying with high-pressure discharge lamp than the drive current of higher frequency, the electrode temperature that just can suppress high-pressure discharge lamp descends.
Thereby the both sides when the 1st power drive and during the 2nd power drive can well suppress flicker.
In light supply apparatus of the present invention, preferably, frequency during above-mentioned the 1st power drive preestablishes into following frequency, when this frequency makes above-mentioned light supply apparatus made it to carry out above-mentioned the 1st power drive, littler than predetermined critical value based on the flicker decision content that obtains by each measured illumination change rate of every predetermined space.
In addition, in light supply apparatus of the present invention, preferably, frequency during above-mentioned the 2nd power drive preestablishes into following frequency, when this frequency made this light supply apparatus made it to carry out above-mentioned the 2nd power drive, the flicker decision content that obtains based on each illumination change rate of measuring by every predetermined space was littler than predetermined critical value.
In the present invention, the frequency when frequency during the 1st power drive (below, record is the 1st power drive frequency) or the 2nd power drive (below, record is the 2nd power drive frequency) for example as shown below, set in advance.
That is to say,, supply with high-pressure discharge lamp, make it to light (the 1st power drive or the 2nd power drive) as the light supply apparatus of frequency setting object with the 1st power or the 2nd power and with the drive current of preset frequency.
Then, with illuminance meter in the given time, press the illumination of predetermined space measurement from the emitted light beam of light supply apparatus.
Then, calculate each illumination change rate of measuring.For example, use 2 illumination successively measuring among each illumination of measuring by predetermined space, the illumination of measuring after calculating respectively is to measuring the rate of change of illumination earlier.
Then, according to each rate of change that calculates, calculate the flicker decision content that is used for judging flicker.For example, distinguish maximum rate of change and minimum rate of change among each rate of change, will deduct value after the minimum rate of change as the flicker decision content from maximum rate of change.
Then, relatively glimmer decision content and predetermined critical value judge whether the change of illumination is bigger.
In a plurality of light supply apparatuses, suppose to make the frequency of drive current of supply all different to each light supply apparatus, implement top step.Then, in a plurality of light supply apparatuses, pick out at least 1 light supply apparatus, the result that this at least 1 light supply apparatus relatively glimmers after decision content and the predetermined critical as mentioned above is, the flicker decision content is littler than predetermined critical, that is to say less, the not flicker of the change that determines illumination.Then, among each drive condition of the light supply apparatus that picks out (each frequency), select best frequency, and be the 1st power drive frequency or the 2nd power drive frequency the frequency setting of selecting.
As mentioned above, because the 1st power drive frequency or the 2nd power drive frequency of not glimmering in the given time preestablished, thereby when the 1st power drive or during the 2nd power drive, can reliably avoid glimmering.
In light supply apparatus of the present invention, preferably, frequency during above-mentioned the 1st power drive preestablishes into following frequency, and this frequency makes that the modulating voltage of above-mentioned high-pressure discharge lamp becomes more than the predetermined critical value at the fixed time when this light supply apparatus being made it to carry out above-mentioned the 1st power drive.
In addition, in light supply apparatus of the present invention, preferably, frequency during above-mentioned the 2nd power drive preestablishes into following frequency, this frequency makes that the modulating voltage of above-mentioned high-pressure discharge lamp becomes more than the predetermined critical value at the fixed time when this light supply apparatus being made it to carry out above-mentioned the 2nd power drive.
In addition, as the characteristic of high-pressure discharge lamp, low at the initial stage of lighting (for example, from lighting beginning 50 hours) modulating voltage as everyone knows.And, when modulating voltage is low, for the power that will supply with high-pressure discharge lamp remains necessarily, be to the mobile a large amount of drive current of high-pressure discharge lamp.And under said circumstances, because lamp device is overheated because of drive current supply high-pressure discharge lamp that will be a large amount of causes, thereby control device generally will control, in order to avoid the current value of drive current reaches more than the predetermined limits value.That is to say that control device is when modulating voltage is low, the control of implementing to make the driving power of supplying with high-pressure discharge lamp to descend is in order to avoid the current value of drive current reaches more than the predetermined limits value.When making the control that driving power descends corresponding to the low enforcement of modulating voltage like this, its result is that the light beam lightness of penetrating from light supply apparatus descends, causes that the electrode material that evaporates because of the temperature anomaly of high-pressure discharge lamp is attached to the so-called melanism on the high-pressure discharge lamp inwall.In addition, will supply with high-pressure discharge lamp near the drive current of limits value and cause the damage of electrode to increase, become the obstacle of high-pressure discharge lamp long lifetime.Thereby, when driving high-pressure discharge lamp, modulating voltage need be maintained more than the predetermined critical value, in order to avoid drive current becomes excessive.
In the present invention, the 1st power drive frequency or the 2nd power drive frequency for example below shown in, set in advance.
That is to say,, supply with high-pressure discharge lamp, make it to light (the 1st power drive or the 2nd power drive) as the light supply apparatus of frequency setting object with the 1st power or the 2nd power and with the drive current of preset frequency.
Then, continuing enforcement in the given time detects the modulating voltage that high-pressure discharge lamp applies.
Then, more detected each modulating voltage and predetermined critical value judge whether each modulating voltage is more than the critical value of being scheduled to.
In a plurality of light supply apparatuses, make the frequency of drive current of supply all different to each light supply apparatus, implement top step.Then, in a plurality of light supply apparatuses, pick out at least 1 light supply apparatus, the result that this at least 1 light supply apparatus compares after each modulating voltage and the predetermined critical as mentioned above is to be judged to be each modulating voltage for more than the predetermined critical value.Then, among each drive condition of the light supply apparatus that picks out (each frequency), select best frequency, and be the 1st power drive frequency or the 2nd power drive frequency the frequency setting of selecting.
As mentioned above, because modulating voltage is that predetermined critical above the 1st power drive frequency or the 2nd power drive frequency are preestablished in the given time, thereby when the 1st power drive or during the 2nd power drive, the situation of melanism can not take place to descend, cause from the light beam lightness that light supply apparatus penetrates, can also under the situation that does not make drive current become excessive, (be suppressed at below the limits value), alleviate the damage of electrode, seek the long lifetime of high-pressure discharge lamp.
In the lighting and driving method of light supply apparatus of the present invention, light supply apparatus possesses: high-pressure discharge lamp, carry out Discharge illuminating between pair of electrodes; Lamp device, the drive current to above-mentioned high-pressure discharge lamp supply preset frequency makes above-mentioned high-pressure discharge lamp light driving; And control device, above-mentioned lamp device is carried out drive controlling, can make power change at least the 1 power and 2nd power littler than above-mentioned the 1st power; Being characterized as of this method, above-mentioned control device is carried out: the power modification information is obtained step, obtains the power modification information of the content that expression changes the driving power of supplying with above-mentioned high-pressure discharge lamp from above-mentioned lamp device; Power change step according to above-mentioned power modification information, is carried out drive controlling to above-mentioned lamp device, and the driving power of high-pressure discharge lamp is supplied with in change from above-mentioned lamp device; And frequency change step, corresponding to the change of driving power in the above-mentioned power change step, above-mentioned lamp device is carried out drive controlling, the frequency of the drive current of high-pressure discharge lamp is supplied with in change from above-mentioned lamp device; Said frequencies change step, when above-mentioned high-pressure discharge lamp being supplied with the 2nd power drive of above-mentioned the 2nd power, frequency is altered to the high frequency of frequency when by above-mentioned power change step above-mentioned high-pressure discharge lamp being supplied with the 1st power drive of above-mentioned the 1st power by above-mentioned power change step.
According to the present invention, because the lighting and driving method of light supply apparatus comprises the power modification information and obtains step, power change step and frequency change step, and frequency change step is when the 2nd power drive, the high frequency of frequency when being altered to frequency than the 1st power drive, thereby can reach effect and the effect identical with above-mentioned light supply apparatus.
Projector of the present invention possesses: light supply apparatus; Optic modulating device to modulating from the emitted light beam of above-mentioned light supply apparatus, forms optical image according to image information; And projecting optical device, enlarging projection is by the formed above-mentioned optical image of above-mentioned optic modulating device; It is characterized by, above-mentioned light supply apparatus is a light supply apparatus recited above.
According to the present invention,, thereby can reach effect and the effect identical with above-mentioned light supply apparatus because projector possesses light supply apparatus recited above.
In addition, because projector possesses the light supply apparatus that can seek the high-pressure discharge lamp long lifetime, thereby can also seek the long lifetime of this projector self.
Moreover, because projector possesses the light supply apparatus that can suppress to glimmer, thereby can form the not good projected image of flash of light.
Description of drawings
Fig. 1 is the accompanying drawing that the projector's summary in modal representation the 1st execution mode constitutes.
Fig. 2 is the block diagram that the light supply apparatus in above-mentioned the 1st execution mode of modal representation constitutes.
Fig. 3 is the flow chart of the frequency setting method in above-mentioned the 1st execution mode of explanation.
Fig. 4 is the block diagram of the frequency setting device in above-mentioned the 1st execution mode of modal representation.
Fig. 5 A is the accompanying drawing that the illumination rate of change in above-mentioned the 1st execution mode of expression changes an example.
Fig. 5 B is the accompanying drawing that the illumination rate of change in above-mentioned the 1st execution mode of expression changes an example.
Fig. 6 A is the accompanying drawing that the illumination rate of change in above-mentioned the 1st execution mode of expression changes an example.
Fig. 6 B is the accompanying drawing that the illumination rate of change in above-mentioned the 1st execution mode of expression changes an example.
Fig. 6 C is the accompanying drawing that the illumination rate of change in above-mentioned the 1st execution mode of expression changes an example.
Fig. 7 is the flow chart of the light supply apparatus lighting and driving method in above-mentioned the 1st execution mode of explanation.
Fig. 8 is the used accompanying drawing of light supply apparatus lighting and driving method in above-mentioned the 1st execution mode of explanation.
Fig. 9 is the flow chart of the frequency setting method in explanation the 2nd execution mode.
Figure 10 is the used accompanying drawing of frequency setting method in above-mentioned the 2nd execution mode of explanation.
Figure 11 A is the accompanying drawing of lamp voltage change one example in above-mentioned the 2nd execution mode of expression.
Figure 11 B is the accompanying drawing of lamp voltage change one example in above-mentioned the 2nd execution mode of expression.
Figure 11 C is the accompanying drawing of lamp voltage change one example in above-mentioned the 2nd execution mode of expression.
Embodiment
[the 1st execution mode]
Below, the 1st execution mode of the present invention is described with reference to the accompanying drawings.
[summary of projector constitutes]
Fig. 1 is the accompanying drawing that modal representation projector 1 summary constitutes.
The light beam that projector 1 is used for penetrating from light source modulates and forms coloured image (optical image) according to image information, this coloured image enlarging projection on screen (not shown).This projector 1 possesses roughly rectangular-shaped external shell 2, as shown in Figure 1 as the projecting lens 3 of projecting optical device and optical module 4 etc.
Also have, diagram concrete in Fig. 1 is omitted, in external shell 2, and in the space except that projecting lens 3 and optical module 4, configuration: cooling package, cool off projector 1 inside; Power supply module is to each component parts supply capability of projector 1 inside; And control basal plate, each component parts of control projector 1 inside; Deng.
Projecting lens 3 constitutes as the set of lenses that has placed a plurality of lens in the lens barrel of tubular, will be by optical module 4 formed coloured image enlarging projections on screen.
[detailed description of optical module]
Light supply apparatus main body 411 possesses illuminator 4111, principal reflection mirror 4112 and the parallelization concavees lens 4113 that carry out Discharge illuminating between pair of electrodes 4111A (referring to Fig. 2).
And, the light beam that radiates from illuminator 4111 makes ejaculation direction unanimity by principal reflection mirror 4112 in the place ahead of light supply apparatus main body 411 one side, penetrated as converging light, and be able to parallelization, penetrated to even illumination optics device 42 by parallelization concavees lens 4113.
Here, as illuminator 4111, use Halogen lamp LED or metal halide lamp or high-pressure mercury-vapor lamp mostly.In addition,,, also can be used as and make, constitute from emitted light beam almost parallelization of illuminator 4111 and the paraboloidal reflector that reflects though in Fig. 1, constitute by ellipsoidal reflector as principal reflection mirror 4112.In this case, save parallelization concavees lens 4113.
Evenly illumination optics device 42 is a kind of optical systems, is used for from the emitted light beam of light supply apparatus main body 411, roughly throws light on equably to the image forming area of the following liquid crystal panel that constitutes Optical devices 45.This even illumination optics device 42 possesses the 1st lens arra the 421, the 2nd lens arra 422, polarization conversion device 423 and overlapping lens 424 as shown in Figure 1.
The 1st lens arra 421 has following the 1st lenslet and roughly is arranged in rectangular formation in the face of quadrature at relative incident light axis, and the 1st lenslet looks the profile with essentially rectangular shape from the incident light axis direction.Each the 1st lenslet will be divided into a plurality of segment beams from the light beam that light supply apparatus main body 411 penetrates.
The 2nd lens arra 422 has the formation roughly the same with the 1st lens arra 421, has the 2nd lenslet and is arranged in rectangular formation.The 2nd lens arra 422 negative lap lens 424 together, the function of the imaging on the following liquid crystal panel of Optical devices 45 of the picture with each the 1st lenslet that makes the 1st lens arra 421.
Particularly, convert each several part light behind basic a kind of polarised light to, substantially all be overlapped at last on the following liquid crystal panel of Optical devices 45 by overlapping lens 424 by polarization conversion device 423.For the projector of the liquid crystal panel of the type of having used modulated polarized light,, cause half so can't be used to spontaneous the wide of light supply apparatus 41 that goes out any polarised light because can only utilize a kind polarised light.Therefore,, will convert roughly a kind of polarised light to, improve the utilization ratio of light in the Optical devices 45 from the ejaculation light of light supply apparatus 41 by using polarization conversion device 423.
Look dissociated optical device 43 as shown in Figure 1, possess 2 dichronic mirrors 431,432 and speculum 433, and have and utilize dichronic mirror 431,432 will be separated into the function of the coloured light of red, green, blue 3 looks from even illumination optics device 42 emitted a plurality of segment beams.
At this moment, by the dichronic mirror 431 of look dissociated optical device 43, reflection is from the blue light components of even illumination optics device 42 emitted light beams, and transmits red light component and green light components.Reflect by speculum 433 by the blue light after dichronic mirror 431 reflection, and arrive the following blue light liquid crystal panel of Optical devices 45 through field lens 425.
This field lens 425 will be from the emitted each several part Beam Transformation of the 2nd lens arra 422 parallel light beam of its central shaft (chief ray) in pairs.Other the green light that is arranged at uses the field lens 425 of liquid crystal panel light beam light incident side also identical with liquid crystal panel, red light.
Among the red light and green light behind the transmission dichronic mirror 431, green light is reflected by dichronic mirror 432, and arrives the following green light liquid crystal panel of Optical devices 45 through field lens 425.On the other hand, red light transmission dichronic mirror 432 and through relay optics 44 arrives the following red light liquid crystal panel of Optical devices 45 through field lens 425 again.
Also have, use the reason of relay optics 44 to be, because the optical path length of red light is long than the optical path length of other coloured light, so will prevent the utilization ratio decline of the light that causes because of scattering of light etc. red light.That is to say, be to pass to field lens 425 for the segment beam that will incide on the light incident side lens 441 by original state.
Light incident side polarization plates 452 is used for only making the following polarized light transmission by among look dissociated optical device 43 isolated each coloured light, and absorb other light beam, this polarised light have with by polarization conversion device 423 and the polarization direction of the roughly the same direction in polarization direction after consistent; The diagram that this light incident side polarization plates is concrete is omitted, and it constitutes pastes polarizing coating on light-transmitting substrate.
Emitting side polarization plates 453 has the formation roughly the same with light incident side polarization plates 452, only makes from the emitted light beam transmission of the image forming area of liquid crystal panel 451, and absorbs other light beam.
Cross colour splitting prism 454 be used for synthetic from emitting side polarization plates 453 emitted by the optical image after every kind of coloured light modulation, form coloured image.This cross colour splitting prism 454 is the roughly square shape of overlooking of 4 right-angle prisms of fitting, and at the interface, forms 2 multilayer thin dielectric films between the applying right-angle prism.These multilayer thin dielectric film transmissions are from liquid crystal panel 451G ejaculation and through the coloured light after the emitting side polarization plates 453, and reflection is from liquid crystal panel 451R, 451B ejaculation and through each coloured light after the emitting side polarization plates 453.Like this, just synthetic each coloured light forms coloured image.Then, by cross colour splitting prism 454 formed coloured images by above-mentioned projecting lens 3 enlarging projections to screen etc.
[formation of light supply apparatus]
Fig. 2 is the block diagram that modal representation light supply apparatus 41 constitutes.
Buck chopper device 51 is connected with above-mentioned power supply module, input direct voltage, and making the input voltage step-down is that suitable direct voltage is supplied with inverter 52.These buck chopper device 51 concrete diagrams are omitted, and adopt the common chopper circuit that is made of diode, choke, capacitor and switch element etc., constitute.That is to say, under the control of making by control device 6, by the duty ratio (ratio of the ON time of time per unit and the deadline of time per unit) of adjusting above-mentioned switch element, control electric current (drive current) or power (driving power) that inverter 52 (illuminator 4111) is supplied with.Also have, the resistance R that on the output of buck chopper device 51, is connected in parallel 1, R2, the tie point current potential of resistance R 1 and resistance R 2 is as the output voltage of buck chopper device 51, apparatus for controlling of supply 6.In addition, detected as drive current in the negative potential side of buck chopper device 51 resistance R 3 that is connected in series to the electric current that resistance R 3 flows, apparatus for controlling of supply 6.
The direct current that inverter 52 is used for supplying with from buck chopper device 51 converts the alternating current of preset frequency to, and supplies with illuminator 4111.These inverter 52 concrete diagrams are omitted, and the common full-bridge circuit that 4 switch elements after employing is connected by full-bridge etc. constitute constitutes.That is to say, under the control of making by control device 6,, control the frequency of the alternating current (drive current) that illuminator 4111 is supplied with by adjusting to make it the to hocket timing of conduction and cut-off of each 2 switch element.
Also have, concrete diagram is omitted, and in control device 6, has and is used for obtaining from the outside external control interface of control signal, is connected with above-mentioned control basal plate via the said external control interface.
Then, the for example operation by the meaning of being undertaken by the user, the expression of the setting input part 21 (Fig. 2) of formed guidance panel on the external shell 2 etc. " is opened the power supply of projector " is from setting 21 pairs of above-mentioned control basal plate out-put supply Continuity signals of input part.In addition, also from the control signal of above-mentioned control basal plate to the meaning of control device 6 output expressions " lighting of beginning illuminator 4111 ".Then, control device 6 begins the drive controlling of lamp device 5 according to the control signal from above-mentioned control basal plate.
In addition, for example by undertaken by the user, to the operation of the meaning of the expression " driving power (rated power (the 1st power), low-power (the 2nd power)) of change illuminator " of setting input part 21, from setting 21 pairs of predetermined operation signals of above-mentioned control basal plate 6 outputs of input part.In addition, also from the control signal of above-mentioned control basal plate to the power modification information of the meaning of control device 6 output conduct expressions " driving power of illuminator is altered to rated power or low-power ".Then, control device 6 is according to the control signal from above-mentioned control basal plate, and the drive controlling of change lamp device 5 changes the driving power of supplying with illuminators 4111 from lamp device 5.
This control device 6 possesses power variation control part 61 and frequency variation control part 62 etc. as shown in Figure 2.
Power variation control part 61 is according to control program and from the control signal of above-mentioned control basal plate, distinguish the tie point current potential (output voltage of buck chopper device 51) of resistance R 1 and R2 and the electric current (drive current) that flows to resistance R 3 on one side, on one side to the predetermined drive signal of buck chopper device 51 outputs, adjust the duty ratio of the above-mentioned switch element of buck chopper device 51, the driving power of supplying with illuminator 4111 from lamp device 5 is controlled.
Also have, in the present embodiment, power variation control part 61 (for example, projector 1 dispatch from the factory before) when following frequency setting, can will be altered to various driving powers from the driving power that lamp device 5 is supplied with illuminator 4111 according to control command from following frequency setting device.In addition, power variation control part 61 when lighting of following light supply apparatus 41 drives (for example, the back of dispatching from the factory of projector 1), storing predetermined control program in not shown memory, implement power variation control according to this control program and from the control signal of above-mentioned control basal plate, this power variation control will be supplied with the driving power of illuminator 4111 from lamp device 5, be altered to the nominal drive (the 1st power drive) as rated power respectively and drive (the 2nd power drive) as lower powered low-power, this low-power is the power littler than rated power.
In addition, in not shown memory, store the limits value of supplying with the drive current of illuminator 4111 from lamp device 5.And 61 pairs of driving powers of supplying with illuminator 4111 from lamp device 5 of power variation control part are controlled, in order to avoid the electric current (drive current) that flows to resistance R 3 surpasses limits value.
Frequency variation control part 62 is according to control program, to the predetermined drive signal of inverter 52 outputs, adjustment makes the hocket timing of conduction and cut-off of above-mentioned each 2 switch element of inverter 52, and the frequency of the drive current of illuminators 4111 is supplied with in control from lamp device 5.
Also have, in the present embodiment, frequency variation control part 62 (for example, projector 1 dispatch from the factory before) when following frequency setting, can will be altered to various frequencies from the frequency that lamp device 5 is supplied with the drive current of illuminator 4111 according to control command from following frequency setting device.In addition, when frequency variation control part 62 drives lighting of following light supply apparatus 41 (for example, the back of dispatching from the factory of projector 1), storing predetermined control program in not shown memory, according to this control program, change frequency by each power by 61 changes of power variation control part.More particularly, frequency variation control part 62 is implemented frequency variation control according to this control program, this frequency variation control will be supplied with the frequency of the drive current of illuminator 4111 from lamp device 5, when nominal drive, be made as predetermined frequency (below, record and narrate and be the nominal drive frequency), when driving, low-power is made as the frequency higher (below, record and narrate be the low-power driving frequency) than nominal drive frequency.
[work of light supply apparatus]
Below, the work of above-mentioned light supply apparatus 41 is described with reference to the accompanying drawings.
Also have, the establishing method of above-mentioned nominal drive frequency and low-power driving frequency at first is described below, the lighting and driving method of light supply apparatus 41 then is described.
[establishing method of frequency]
Fig. 3 is the flow chart of explanation frequency setting method.
Also having, below, is to be loaded into projector 1 inside as the state of the light supply apparatus 41 of frequency setting object.In addition, when setpoint frequency, be made as frequency of utilization setting device 100 (referring to Fig. 4).
Fig. 4 is the block diagram of modal representation frequency setting device 100.
And arithmetic processing apparatus 110 is connected with the above-mentioned control basal plate of projector 1 via predetermined interface, can carry out drive controlling to projector 1 by projector 1 is exported in the expectant control instruction.In addition, arithmetic processing apparatus 110 and illuminance meter 130 are electrically connected, and by illuminance meter 130 is exported in the expectant control instruction, illuminance meter 130 are carried out drive controlling, import the illumination of being measured by illuminance meter 130 successively.
At first, the operator operates the not shown operating portion of arithmetic processing apparatus 110, the driving power of supplying with illuminator 4111 is set at predetermined electric power (rated power or low-power), and the frequency setting that will supply with the drive current of illuminator 4111 again is predetermined frequency.Then, the operator is if implemented the operation of the meaning that expression " comes the driving light source device by driving power that sets and frequency " to aforesaid operations portion, then from the 1 output expectant control instruction of arithmetic processing apparatus 110 pairs of projectors.Then, the above-mentioned control basal plate of projector 1 is exported to control device 6 according to above-mentioned control command with predetermined control signal.After this, 6 pairs of lamp devices of control device 5 carry out drive controlling, make to supply with illuminator 4111 from lamp device 5 with rated power or low-power and with the drive current of preset frequency, make illuminator 4111 light (step S100).
In addition, above-mentioned control basal plate is carried out drive controlling according to above-mentioned control command to each liquid crystal panel 451, makes to form white image on each liquid crystal panel 451.Then, from projector 1 to screen 120 enlarging projection white image, projection white image on screen 120.
In step S100,, illuminator 4111 (for example begins the process scheduled time from being lighted, 10 minutes) after, the 130 output expectant control instructions of 110 pairs of illuminance meters of arithmetic processing apparatus, (for example make illuminance meter 130 every predetermined space, 200ms) in the given time (for example, 10 minutes), the illumination (step S200) of the approximate centre position O of the white image of institute's projection on the measurement screen 120.Export to arithmetic processing apparatus 110 successively by the illumination that illuminance meter 130 is measured.Then, arithmetic processing apparatus 110 will make each illumination data of each illumination and the time correlation connection of measuring, be stored in the not shown memory.
After the step S200, arithmetic processing apparatus 110 is read each illumination data of being stored in the above-mentioned memory, calculates the illumination rate of change (step S300) as the rate of change of following each illumination, and this illumination is measured by illuminance meter 130.
Particularly, arithmetic processing apparatus 110 is for example as being shown in shown in following table 1 example, distinguish the Measuring Time (data No.) of each illumination, the illumination that calculating becomes illumination rate of change calculating object relatively its be right after before the illumination measured, as the rate of change of the illumination of aforementioned calculation object, be used as the illumination rate of change (%).
Table 1
| Data No. | Illumination | The illumination rate of |
| 100 | 5000 | - |
| 101 | 5050 | 1.00％ |
| 102 | 5100 | 0.99％ |
| 103 | 5080 | -0.39％ |
After the step S300, arithmetic processing apparatus 110 calculates flicker decision content (step S400) according to each the illumination rate of change that calculates, and this flicker decision content is used for judging the light beam that penetrates from light supply apparatus 41 whether flicker has taken place.
Particularly, maximum and minimum value among each illumination rate of change that arithmetic processing apparatus 110 discrimeters are calculated are calculated the value that deducts after the minimum value from maximum and are used as the decision content that glimmers.
After the step S400, the critical value (for example, 3%) of being stored in flicker decision content that arithmetic processing apparatus 110 relatively calculates and the not shown memory judges that whether the flicker decision content is than critical value little (step S500).
In step S500, arithmetic processing apparatus 110 just determines the flicker decision content and is critical value when above when being judged to be "No", be judged to be and from the light beam of light supply apparatus 41 ejaculations flicker (NG) (step S600) taking place.
On the other hand, in step S500, arithmetic processing apparatus 110 just determines the flicker decision content than critical value hour when being judged to be "Yes", be judged to be (OK) (the step S700) that do not glimmer the light beam that penetrates from light supply apparatus 41.
In being in a plurality of light supply apparatuses 41 of new product state (a plurality of light supply apparatuses 41 are identical formations), each light supply apparatus 41 is made the frequency difference that in step S100, sets, implement step S100～S700 (below, record is the 1st process) as above respectively.
Then, for device among a plurality of light supply apparatuses 41 of implementing the 1st process, that in step S700, be judged to be " OK ", implementation step S200～S700 (below, record is the 2nd process) once more.Here, when implementing the 2nd process, in step S100, continue lighting of illuminator 4111, during latter stage in reaching the predefined life-span guaranty period of light supply apparatus 41, implementation step S200～S700 once more.
Then, selection was implemented the 2nd process and was judged to be optimum frequency among each drive condition (each frequency) of at least 1 light supply apparatus 41 of " OK " by step S700, and was the nominal drive frequency or the low-power driving frequency of light supply apparatus 41 with the frequency setting of selecting.
Fig. 5 and Fig. 6 are the accompanying drawings that the expression illumination rate of change changes an example.Particularly, Fig. 5 is the expression accompanying drawing that the illumination rate of change of (new product state) changes when implementing the 1st process.Fig. 6 is the expression accompanying drawing that the illumination rate of change of (state in latter stage in the life-span guaranty period) changes when implementing the 2nd process.
The example of Fig. 5 A and Fig. 6 A is expressed, among a plurality of light supply apparatuses 41 that driven with rated power (170W) as driving power, the variation of the illumination rate of change the both sides of the 1st process and the 2nd process are judged to be 1 light supply apparatus 41 of " OK " by step S700 in.And, in the present embodiment, selection was implemented the 2nd process and was judged to be following frequency 105Hz among each drive condition (each frequency) of at least 1 light supply apparatus 41 of " OK " by step S700, and be the nominal drive frequency with this frequency setting, this frequency is the drive condition of the light supply apparatus 41 shown in the example of Fig. 5 A and Fig. 6 A.
The example of Fig. 5 B is expressed, and among a plurality of light supply apparatuses 41 that driven with low-power (135W) as driving power, frequency setting is become the variation of the illumination rate of change in the light supply apparatus 41 of nominal drive frequency (105Hz).And, shown in the example of Fig. 5 B, in that when coming driving light source device 41 and implementing the 1st process, the variation of the illumination rate of change is less by above-mentioned drive condition (low-power (135W), nominal drive frequency (105Hz)), in step S700, be judged to be " OK ".But shown in the example of Fig. 6 B, when coming driving light source device 41 by above-mentioned drive condition and implementing the 2nd process, the variation of the illumination rate of change is bigger, is judged to be in step S700 " NG ".
The example of Fig. 6 C is expressed, the variation of the illumination rate of change in the light supply apparatus 41 among the identical a plurality of light supply apparatuses 41 that driven with low-power (135W) as driving power with the example of Fig. 5 A and Fig. 5 B, that frequency setting become the frequency 155Hz higher than nominal drive frequency (105Hz).And, shown in the example of Fig. 6 C,, in step S700, be judged to be " OK " in that when coming driving light source device 41 and implementing the 2nd process, the variation of the illumination rate of change is less by above-mentioned drive condition (low-power (135W), frequency (155Hz)).And, in the present embodiment, selection was implemented the 2nd process and was judged to be the drive condition and the following frequency 155Hz of the light supply apparatus 41 shown in the example of Fig. 6 C among each drive condition of at least 1 light supply apparatus 41 of " OK " by step S700, and be the low-power driving frequency with this frequency setting, this frequency is the frequency higher than nominal drive frequency.
[lighting and driving method of light supply apparatus]
Fig. 7 is the flow chart of explanation light supply apparatus 41 lighting and driving methods.
Fig. 8 is the used accompanying drawings of explanation light supply apparatus 41 lighting and driving methods.Particularly, Fig. 8 is the driving power waveform of illuminator 4111 is supplied with in expression from lamp device 5 a accompanying drawing.
Also have, below, be made as according to above-mentioned frequency setting method pre-set nominal drive frequency and low-power driving frequency.In addition, establish its state and be, by undertaken by the user to setting the operation of input part 21, projector 1 is started, light supply apparatus 41 is just being lighted driving.
Whether at first, control device 6 monitors always: by by the user operation of the meaning of the expression " driving power of change illuminator " setting input part 21 and carry out having been exported predetermined control signal, whether obtained power modification information (whether the change indication of driving power is arranged) (step S1: the power modification information is obtained step) from above-mentioned control basal plate.
In step S1, control device 6 is when above-mentioned control basal plate has obtained the power modification information, power change step) and frequency variation control (step S3: frequency variation control), make that lamp device 5 is as follows to carry out work according to control program lamp device 5 output drive signals are implemented above-mentioned power variation control (step S2:.
For example, when the driving condition before this was nominal drive, by the control of the power variation among the step S2, buck chopper device 51 was adjusted the duty ratio of above-mentioned switch element, and as shown in Figure 8, the driving power of supplying with illuminator 4111 is altered to low-power (135W) from rated power (170W).In addition, control by the frequency variation among the step S3, inverter 52 adjustment makes the timing of above-mentioned each 2 switch element alternate conduction/end, and as shown in Figure 8, the frequency of supplying with the drive current of illuminator 4111 is altered to low-power driving frequency (155Hz) as the frequency higher than this nominal drive frequency from nominal drive frequency (105Hz).Then, converting low-power to from nominal drive drives.
In addition, be that low-power is when driving for example at before this driving condition, control by the power variation among the step S2, buck chopper device 51 is adjusted the duty ratio of above-mentioned switch element, and as shown in Figure 8, the driving power of supplying with illuminator 4111 is altered to rated power (170W) from low-power (135W).In addition, control by the frequency variation among the step S3, inverter 52 adjustment makes the timing of above-mentioned each 2 switch element alternate conduction/end, and as shown in Figure 8, the frequency of supplying with the drive current of illuminator 4111 is altered to nominal drive frequency (105Hz) as the frequency lower than this low-power driving frequency from low-power driving frequency (155Hz).Then, convert nominal drive to from the low-power driving.
As mentioned above, control device 6 is obtained corresponding to the power modification information, changes nominal drive and low-power and drives.
In the above-described first embodiment, has following effect.
In the present embodiment, control device 6 possesses power variation control part 61 and frequency variation control part 62, when nominal drive, the drive current of the nominal drive frequency (105Hz) that rated power (170W) that the low-power (135W) when driving than low-power is big and the low-power driving frequency (155Hz) will drive than low-power the time are low is supplied with illuminator 4111.Whereby, when nominal drive, supply with illuminator 4111 by rated power (170W) that will be bigger, and the electrode 4111A temperature that can suppress illuminator 4111 descends, and the drive current of the nominal drive frequency (105Hz) by will be lower is supplied with illuminator 4111, forms electrode 4111A on and the 1st protruding different the 2nd useless projection that becomes the starting point of discharging and can be suppressed at.Therefore, when nominal drive, can avoid temperature with electrode 4111A to drop to the flicker of reason and be the both sides of the flicker of reason, can well suppress flicker on electrode 4111A, to form the 2nd projection.In addition, when nominal drive,, can seek the long lifetime of illuminator 4111 because the drive current of nominal drive frequency (105Hz) that will be lower is supplied with illuminator 4111, thereby can prevent the electrode 4111A front end loss of illuminator 4111.
; though when nominal drive, can well suppress flicker as described above; but when low-power drives; when for example a frequency that the nominal drive frequency (105Hz) when being made as the low-power driving frequency with nominal drive is identical and a low-power (135W) littler than rated power (170W) are supplied with illuminator 4111; because the frequency ratio of the drive current of supply illuminator 4111 is lower, descend so can't suppress the temperature of electrode 4111A.
According to present embodiment, when control device 6 drives in low-power, the drive current of the low-power driving frequency (155Hz) that low-power (135W) that the rated power (170W) with than nominal drive the time is little and the nominal drive frequency (105Hz) will be than nominal drive the time are high is supplied with illuminator 4111.Whereby, when low-power drove, by will supplying with high-pressure discharge lamp than the drive current of higher low-power driving frequency (155Hz), and the temperature that can suppress the electrode 4111A of illuminator 4111 descended.
Thereby, when nominal drive and the both sides of low-power when driving, can well suppress flicker.
In addition, control device 6 is because when nominal drive and low-power when driving, making the waveform of supplying with the driving power of illuminator 4111 from lamp device 5 is square wave, thereby cause by per half period, all supply with the driving power and the drive current of certain peak value at the scope interior focusing source of this half period lamp 4111.Therefore, the beam brightness of penetrating from illuminator 4111 does not produce change.In addition, for example compare, can suppress damage, can seek the long lifetime of illuminator 4111 electrode 4111A with being about to carry out the formation that polarity increases driving power, drive current before anti-phase.
Here, because nominal drive frequency and low-power driving frequency frequency of utilization setting device 100, preestablish the frequency of not glimmering in the given time respectively, thereby when nominal drive and low-power when driving, can reliably avoid glimmering.
And, because projector 1 possesses the light supply apparatus 41 that can seek illuminator 4111 long lifetimes, thereby can also seek the long lifetime of projector 1 self.
In addition, because projector 1 possesses the light supply apparatus 41 that can suppress to glimmer, thereby can form the not good projected image of flash of light.
[the 2nd execution mode]
Below, the 2nd execution mode of the present invention is described with reference to the accompanying drawings.
In the following description, formation identical with above-mentioned the 1st execution mode and identical parts are enclosed identical symbol, its detailed explanation is omitted or is simplified.
Present embodiment is the establishing method difference of frequency (nominal drive frequency, low-power driving frequency) with respect to above-mentioned the 1st execution mode.That is to say that the formation of the formation of light supply apparatus 41 and projector 1 is identical with above-mentioned the 1st execution mode.
Fig. 9 is the flow chart of the frequency setting method in explanation the 2nd execution mode.
Figure 10 is the used accompanying drawing of explanation frequency setting method.
Also have, in the present embodiment, light supply apparatus 41 as the frequency setting object is different with above-mentioned the 1st execution mode, is not loaded into projector 1 inside, uses with the form of these light supply apparatus 41 monomers (just illuminator 4111, lamp device 5, control device 6, DC/DC transducer 7).In addition, identical with above-mentioned the 1st execution mode when setpoint frequency, frequency of utilization setting device 100.
Here, different with above-mentioned the 1st execution mode in the present embodiment, concrete diagram is omitted, and as frequency setting device 100, only adopts arithmetic processing apparatus 110, saves screen 120 and illuminance meter 130.
And arithmetic processing apparatus 110 is identical with above-mentioned the 1st execution mode, is connected with the above-mentioned control basal plate of projector 1 via predetermined interface, can carry out drive controlling to projector 1 by projector 1 is exported in the expectant control instruction.In addition, arithmetic processing apparatus 110 constitutes, and can obtain the modulating voltage that illuminator 4111 is applied.Also have, adquisitiones as modulating voltage, for example shown in Figure 10, in lamp device 5, resistance R 4, R5 in advance are connected in parallel on the output of lighting device 53, constitute voltage detecting circuit, the tie point current potential between this voltage detecting circuit detection resistance R 4 and the R5 is used as the modulating voltage of illuminator 4111.And, will offer arithmetic processing apparatus 110 by the detected modulating voltage of above-mentioned voltage detecting circuit.
At first, the operator operates the not shown operating portion of arithmetic processing apparatus 110, the driving power of supplying with illuminator 4111 is set at predetermined electric power (rated power or low-power), and the frequency setting that will supply with the drive current of illuminator 4111 again is predetermined frequency.Then, the operator is if implemented the operation of the meaning that expression " comes the driving light source device by driving power that sets and frequency " to aforesaid operations portion, then from the 1 output expectant control instruction of arithmetic processing apparatus 110 pairs of projectors.Then, the above-mentioned control basal plate of projector 1 is exported to control device 6 according to above-mentioned control command with predetermined control signal.After this, 6 pairs of lamp devices of control device 5 carry out drive controlling, make to supply with illuminator 4111 from lamp device 5 with rated power or low-power and with the drive current of preset frequency, make illuminator 4111 light (step S100A).
From making illuminator 4111 light beginning among step S100A, in (for example 50 hours), arithmetic processing apparatus 110 is obtained the modulating voltage (step S200A) that illuminator 4111 is applied successively at the fixed time.Then, arithmetic processing apparatus 110 is stored in each obtained modulating voltage in the not shown memory.
After the step S200A, the critical value of being stored in each modulating voltage that arithmetic processing apparatus 110 is more obtained and the not shown memory (for example, 55V), judges whether each modulating voltage is critical value above (step S300A).
In step S300A, arithmetic processing apparatus 110 is when being judged to be "No", and what just be judged to be each modulating voltage is some at least when not reaching critical value, is judged to be " NG " (step S400A).
On the other hand, in step S300A, arithmetic processing apparatus 110 just is judged to be each modulating voltage and all is critical value when above when being judged to be "Yes", be judged to be " OK " (step S500A).
In being in a plurality of light supply apparatuses 41 of new product state (a plurality of light supply apparatuses 41 are identical formations), suppose each light supply apparatus 41 is all made the frequency difference that sets in step S100A, implement step S100A～S500A as above respectively.
Then, in a plurality of light supply apparatuses 41 of being implemented by each drive condition (each frequency) as above, be chosen in the optimum frequency among each drive condition (each frequency) of at least 1 light supply apparatus 41 that is judged to be " OK " among the step S500A, and be nominal drive frequency or low-power driving frequency the frequency setting of selecting.
Figure 11 A～Figure 11 C is the accompanying drawing of indication lamp change in voltage one example.
The example of Figure 11 A is expressed, variation among a plurality of light supply apparatuses 41 that driven with rated power (170W) as driving power, be judged to be the modulating voltage in 1 light supply apparatus 41 of " OK " by step S500A in above-mentioned processing.And, in the present embodiment, selection was implemented above-mentioned processing and was judged to be following frequency 105Hz among each drive condition (each frequency) of at least 1 light supply apparatus 41 of " OK " by step S500A, and be the nominal drive frequency with this frequency setting, this frequency 105Hz is the drive condition of the light supply apparatus 41 shown in the example of Figure 11 A.
The example of Figure 11 B is expressed, the variation of the modulating voltage in the light supply apparatus 41 among a plurality of light supply apparatuses 41 that driven with low-power (135W) as driving power, that with frequency setting be nominal drive frequency (105Hz).And, shown in the example of Figure 11 B, in that when coming driving light source device 41 and implementing above-mentioned processing, modulating voltage is judged to be " NG " by step S400A below 55V by above-mentioned drive condition (low-power (135W), nominal drive frequency (105Hz)).
The example of Figure 11 C is expressed, among a plurality of light supply apparatuses 41 that driven with low-power (135W) as driving power in the same manner with the example of Figure 11 B, with the variation of frequency setting for the modulating voltage in the light supply apparatus 41 of the frequency 155Hz higher than nominal drive frequency (105Hz).And, shown in the example of Figure 11 C, in that when coming driving light source device 41 and implementing above-mentioned processing, modulating voltage is judged to be " OK " by step S500A more than 55V by above-mentioned drive condition (low-power (135W), frequency (155Hz)).And, in the present embodiment, selection was implemented above-mentioned processing and was judged to be drive condition, the following frequency 155Hz of the light supply apparatus 41 shown in the example of Figure 11 C among each drive condition of at least 1 light supply apparatus 41 of " OK " by step S500A, and be the low-power driving frequency with this frequency setting, this frequency 155Hz is the frequency higher than nominal drive frequency.
Also have, in the present embodiment in the lighting and driving method of light supply apparatus 41 and above-mentioned the 1st execution mode illustrated lighting and driving method identical, its explanation is omitted.
In the above-described 2nd embodiment, except the effect identical with above-mentioned the 1st execution mode, the effect below also having.
In the present embodiment, because nominal drive frequency and low-power driving frequency frequency of utilization setting device 100 (arithmetic processing apparatus 110), preestablish that to make modulating voltage in the given time be the above frequency of predetermined critical respectively, thereby when nominal drive and low-power when driving, the situation of melanism can not appear descending, causing from the light beam lightness that light supply apparatus 41 penetrates, can also under the situation that does not make drive current become excessive, (suppress) for below the limits value, alleviate damage, seek the long lifetime of illuminator 4111 electrode 4111A.
In addition, when setting nominal drive frequency and low-power driving frequency, owing to unlike above-mentioned the 1st execution mode, need screen 120 and illuminance meter 130, thereby when frequency setting, can reduce the operating space, effectively utilize.
Also have, the present invention is not defined as above-mentioned execution mode, can reach distortion in the scope of the object of the invention, improvement etc. and be included among the present invention.
In the respective embodiments described above, though power variation control part 61 constitutes, to supply with the driving power of illuminator 4111 from lamp device 5, be altered to rated power (170W) and the low-power (135W) littler 2 grades than rated power, but be not limited thereto, for example also can constitute: be altered to the 1st power except that rated power, 2 grades of little the 2nd power than the 1st power.Even if in this case, as the function of frequency variation control part 62, when the supply of the 2nd power, the high frequency of frequency when being altered to frequency than the 1st power drive.In addition, also can be following formation: change to 3 grades of the 3rd little power of the 1st power, the 2nd power and Bi Di 1 power and the 2nd power.
In the respective embodiments described above, though the conversion that nominal drive and low-power drive is implemented by user's operating and setting input part 21, but be not limited thereto, when for example also can in being judged as certain hour, not set the operation of input part 21 by the control device 6 that is loaded into above-mentioned control basal plate in the projector 1, constitutes light supply apparatus 41 etc., judge alone, implement the conversion that nominal drive and low-power drive.
In the respective embodiments described above, the establishing method of nominal drive frequency and low-power driving frequency is not limited to each illustrated in the respective embodiments described above establishing method, also can adopt other establishing method.
In the respective embodiments described above, the formation of light supply apparatus main body 411 is not limited to formation illustrated in the respective embodiments described above, also can adopt other formation.For example, formation as light supply apparatus main body 411, can adopt the formation that except illuminator 4111, principal reflection mirror 4112, also possesses secondary speculum, the configuration of the reflecting surface subtend of this its reflecting surface of pair speculum and principal reflection mirror 4112, the part of the light beam that will be radiated from illuminator 4111 reflects towards discharge space.
In the respective embodiments described above, projector 1 is made of the three-chip type projector that possesses 3 liquid crystal panels 451, but is not limited thereto, and also can be made of the one chip projector that possesses 1 liquid crystal panel.In addition, also can be used as the projector that possesses 2 liquid crystal panels, the projector that possesses the liquid crystal panel more than 4, constitute.
In the respective embodiments described above, though used the light entrance face transmissive type liquid crystal panel different, also can use the light entrance face reflective liquid crystal panel identical with light emergence face with light emergence face.
In the respective embodiments described above,, also can use the optic modulating device beyond the liquid crystal, as the device that adopts micro mirror etc. though used liquid crystal panel as optic modulating device.At this moment, the polarization plates 452,453 of light beam light incident side and light beam emitting side can be omitted.
In the respective embodiments described above, though only enumerate the example that carries out the front projection type projector of projection from the direction of watching screen, the present invention also can be used for from the back projecting projector that carries out projection with the direction opposition side of watching screen.
In the respective embodiments described above,, the invention is not restricted to this, also can in other optical devices, use light supply apparatus of the present invention though in projector, adopted light supply apparatus of the present invention.
Implement to have carried out publicity in the superincumbent explanations such as the best formation required for the present invention, but the present invention is not limited thereto.That is to say, though the present invention has mainly carried out diagram and explanation especially for specific execution mode, but under the situation that does not break away from technical conceive of the present invention and purpose scope, for top illustrated execution mode, can be aspect shape, material, quantity and other concrete formations, by those skilled in the art's various distortion in addition.
Thereby, the record that top illustrated shape, material etc. are made qualification for easy to understand the present invention example record and narrate, be not used for limiting the present invention, so the record under part or all component names outside limiting such as the qualification of these shapes, material etc. is included among the present invention.
Light supply apparatus of the present invention be because can seek the long lifetime of high-pressure discharge lamp, and can suppress flicker, thus can be used as be loaded into be used for showing, the light supply apparatus of the projector of home theater, be used.
Claims (7)
1. light supply apparatus, it possesses: high-pressure discharge lamp, it carries out Discharge illuminating between pair of electrodes; Lamp device, it makes above-mentioned high-pressure discharge lamp light driving to the drive current of above-mentioned high-pressure discharge lamp supply preset frequency; And control device, it carries out drive controlling to above-mentioned lamp device; It is characterized by,
Above-mentioned control device possesses:
The power variation control part, it controls the driving power of supplying with above-mentioned high-pressure discharge lamp from above-mentioned lamp device, driving power can be altered at least the 1 power and 2nd power littler than above-mentioned the 1st power; With
The frequency variation control part, it controls the frequency of supplying with the drive current of above-mentioned high-pressure discharge lamp from above-mentioned lamp device, can change said frequencies;
Said frequencies change control part, when above-mentioned high-pressure discharge lamp being supplied with the 2nd power drive of above-mentioned the 2nd power by above-mentioned power variation control part, frequency is altered to following frequency, the frequency height of said frequencies when above-mentioned high-pressure discharge lamp being supplied with the 1st power drive of above-mentioned the 1st power by above-mentioned power variation control part.
2. light supply apparatus according to claim 1 is characterized by:
Frequency during above-mentioned the 1st power drive, preestablish into following frequency, this frequency makes: when making above-mentioned light supply apparatus carry out above-mentioned the 1st power drive, littler than predetermined critical value based on the resulting flicker decision content of the rate of change of each illumination of measuring by predetermined space.
3. light supply apparatus according to claim 1 and 2 is characterized by:
Frequency during above-mentioned the 2nd power drive, preestablish into following frequency, this frequency makes: when making this light supply apparatus carry out above-mentioned the 2nd power drive, littler than predetermined critical value based on the resulting flicker decision content of the rate of change of each illumination of measuring by predetermined space.
4. light supply apparatus according to claim 1 is characterized by:
Frequency during above-mentioned the 1st power drive preestablishes into following frequency, and this frequency makes: when making this light supply apparatus carry out above-mentioned the 1st power drive, the modulating voltage of above-mentioned high-pressure discharge lamp is at the fixed time for more than the predetermined critical value.
5. according to claim 1 or 4 described light supply apparatuses, it is characterized by:
Frequency during above-mentioned the 2nd power drive preestablishes into following frequency, and this frequency makes: when making this light supply apparatus carry out above-mentioned the 2nd power drive, the modulating voltage of above-mentioned high-pressure discharge lamp is at the fixed time for more than the predetermined critical value.
6. the driving method that can make the high-pressure discharge lamp that the power supplied with changes between the rank more than 2 is characterized by, and comprising:
Above-mentioned high-pressure discharge lamp is supplied with the step of the 1st power with the 1st frequency; With above-mentioned high-pressure discharge lamp is supplied with the step of the 2nd power with the 2nd frequency,
Above-mentioned the 1st power of above-mentioned the 2nd power ratio is little, above-mentioned the 1st frequency height of above-mentioned the 2nd frequency ratio.
7. projector, it possesses: light supply apparatus; Optic modulating device, it to modulating from the emitted light beam of above-mentioned light supply apparatus, forms optical image corresponding to image information; And projecting optical device, its enlarging projection is by the formed above-mentioned optical image of above-mentioned optic modulating device; It is characterized by,
Above-mentioned light supply apparatus is each described light supply apparatus in the claim 1 to 5.
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|---|---|---|---|
| JP2006208127 | 2006-07-31 | ||
| JP208127/2006 | 2006-07-31 | ||
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| CN 200710139771 Pending CN101119607A (en) | 2006-07-31 | 2007-07-31 | Light source device, lighting and driving method thereof and projector |
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Cited By (3)
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| CN103080834A (en) * | 2010-08-16 | 2013-05-01 | Nec显示器解决方案株式会社 | Image display device and light source cooling method |
| CN103676435A (en) * | 2012-09-21 | 2014-03-26 | 精工爱普生株式会社 | Projector and method of controlling projector |
| US8841854B2 (en) | 2008-11-14 | 2014-09-23 | Seiko Epson Corporation | Driving device for discharge lamp, light source device, image display apparatus, and driving method for discharge lamp |
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2007
- 2007-07-31 CN CN 200710139771 patent/CN101119607A/en active Pending
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| US8841854B2 (en) | 2008-11-14 | 2014-09-23 | Seiko Epson Corporation | Driving device for discharge lamp, light source device, image display apparatus, and driving method for discharge lamp |
| CN104270878A (en) * | 2008-11-14 | 2015-01-07 | 精工爱普生株式会社 | Driving Device For Discharge Lamp, Driving Method Thereof, Light Source Device And Image Display Apparatus |
| CN103080834A (en) * | 2010-08-16 | 2013-05-01 | Nec显示器解决方案株式会社 | Image display device and light source cooling method |
| US9022573B2 (en) | 2010-08-16 | 2015-05-05 | Nec Display Solutions, Ltd. | Image display device and light source cooling method |
| CN103080834B (en) * | 2010-08-16 | 2015-12-02 | Nec显示器解决方案株式会社 | Image display and light source cooling method |
| CN103676435A (en) * | 2012-09-21 | 2014-03-26 | 精工爱普生株式会社 | Projector and method of controlling projector |
| CN103676435B (en) * | 2012-09-21 | 2016-01-06 | 精工爱普生株式会社 | Projector and control method thereof |
| US9939716B2 (en) | 2012-09-21 | 2018-04-10 | Seiko Epson Corporation | Projector and method of controlling projector |
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