CN1497334A - Lighting device and projector - Google Patents
Lighting device and projector Download PDFInfo
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- CN1497334A CN1497334A CNA2003101002608A CN200310100260A CN1497334A CN 1497334 A CN1497334 A CN 1497334A CN A2003101002608 A CNA2003101002608 A CN A2003101002608A CN 200310100260 A CN200310100260 A CN 200310100260A CN 1497334 A CN1497334 A CN 1497334A
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Abstract
When a video signal is inputted to a projector (10) through a video input terminal, a luminance peak value of an image of the video signal is detected by an image-analyzing circuit (61) to be outputted to a CPU (71). A gain-adjusting circuit (63) adjusts a luminance signal in the video signal based on a command from the CPU (71). The CPU (71) determines a gain adjustment amount based on the luminance peak value of the image obtained by the image-analyzing circuit (61) and outputs the result to the gain-adjusting circuit (63). For instance, when the luminance peak value (lp) of the image is 50% of the upper limit (Imax) thereof, a gain-adjusting amount AG is doubled In this case, an illuminating light volume of a light valve (44a) has to be reduced to 50%, which is achieved by light-attenuation by a light-source lamp (21) and an open/close light shield (23).
Description
Technical field
The projector that the present invention relates to lighting device and use this lighting device.
Background technology
In projector, according to the mean flow rate of image the amount of emitted light as the metal halide lamp of light source is controlled, be well known (for example, opening flat 5-66501 communique) with this method that improves the contrast of image with reference to the spy.
In addition, replace the amount of emitted light of light source is changed, the method for utilizing the light quantity of being undertaken by optical diaphragm to regulate the contrast that improves image also is well known (for example, opening the 2002-23106 communique with reference to the spy).
But, in projector, the light source of main flow is a high-pressure mercury-vapor lamp now, open under the situation that the technology put down in writing in the flat 5-66501 communique similarly changes with special at the amount of emitted light of wanting to make this high-pressure mercury-vapor lamp, only 100% amount of emitted light can be reduced to about 70%, the result can not fully improve the contrast of image.
In addition, specially open the optical diaphragm of being put down in writing in the 2002-23106 communique light source light is carried out dim light to greatest extent, then can produce and cause heat to concentrate on the optical diaphragm part, bring problems such as harmful effect for peripheral optical device etc. if utilize.
In addition, utilize optical diaphragm with light source light to greatest extent dim light be under 30%～40% the situation, can produce because of the small configuration error of lamp, shadow shield, integraph etc. and causing the illumination inequality to become obviously, because of lamp replacing etc. causes the unequal problem of extreme illumination.
Summary of the invention
At this,, also can make lighting device that the contrast of image improves and the projector that uses this lighting device even the object of the present invention is to provide a kind ofly under the situation of the few lamp of the variable that uses the such amount of emitted light of high-pressure mercury-vapor lamp.
In addition, crossing under the situation of the intensity of illumination light having been carried out regulate in wide range ground, also be difficult for producing the harmful effect of the heating that causes because of dim light, be difficult for producing the uneven lighting device of illumination etc. even the present invention also aims to provide a kind of.
For addressing the above problem, lighting device of the present invention possesses light source drive device, the shade to regulating from the illumination light intensity of light source taking-up of the amount of emitted light of illuminating light source, adjusting light source.
In above-mentioned lighting device, light source drive device is regulated the amount of emitted light of light source, and shade is regulated the illumination light intensity that takes out from light source, and the range of adjustment ground that therefore can surpass the amount of emitted light of light source is regulated the brightness of illumination light.In addition, compare, when can reducing the heating that causes by shade, can also reduce the consumption electric power of light source with the situation of only intensity of illumination light being regulated by shade.
In addition, in the concrete scheme of above-mentioned lighting device, shade is the optical modulation element that the illumination light of light source is partly seen through.In this case, can carry out accurate light quantity by the control of electronic type regulates.
In addition, in another concrete scheme of above-mentioned lighting device, shade is for partly covering the optical diaphragm of the illumination light of light source.In this case, can utilize simple mechanism to carry out accurate light quantity regulates.
In addition, in another concrete scheme of above-mentioned lighting device, optical diaphragm possess have make the peristome that the illumination light from light source sees through and cover from a plurality of shadow mask of the light shielding part of the part of the illumination light of light source and can so that peristome and light shielding part in shadow mask travel mechanism that the overlapping mode of exit direction from the illumination light of light source moves a plurality of shadow mask mutually.In this case, the structure of optical diaphragm can be provided with simpler, for example, mobile by a plurality of shadow mask are slided mutually, can make peristome and light shielding part overlapping on exit direction from the illumination light of light source, can be easily and the light quantity of implementing optical diaphragm apace regulate.In addition, as shadow mask, not special the qualification, for example, can sample peristome and light shielding part are arranged in cancellate or peristome and light shielding part assortment and become concentric circles.
In addition, in another concrete scheme of above-mentioned lighting device, shadow mask travel mechanism possess with direction from the lighting optical axis quadrature of the illumination light of light source on extend, serve as the turning axle of axle rotation and a plurality of moving parts of engaging with this turning axle, moving along the turning axle direction along with the rotation of turning axle with this direction.And a plurality of moving parts engage with a plurality of shadow mask, along with the rotation of turning axle is moved so that a plurality of shadow mask moves mutually along the turning axle direction.In this case, only make the turning axle rotation, a plurality of shadow mask are moved mutually, can realize the simplicity of the structure of shadow mask travel mechanism.In addition, because the mutual amount of movement of the rotation angle of turning axle and a plurality of shadow mask has corresponding relation, so by critically controlling the rotation angle of turning axle, can be easily and implement the light quantity adjustment undertaken by optical diaphragm accurately.
In addition, in another concrete scheme of above-mentioned lighting device, optical diaphragm further has the moving part loading component that direction that a plurality of moving parts are left mutually loads on the axial direction that makes it at turning axle.For example, be constituted as a plurality of moving parts and turning axle threaded engagement, can be by turning axle rotation change threaded engagement state with situation about moving under, because the moving part loading component loads a plurality of moving parts to the direction that the axial direction that makes it at turning axle leaves mutually, so can prevent the deviation of the threaded engagement state of the turning axle that produces because of the clearance of thread groove and a plurality of moving parts, the light quantity that can high-precisionly thickly implement to be undertaken by optical diaphragm is regulated.
In addition, in another concrete scheme of above-mentioned lighting device, further have optical modulation element drive unit that drives optical modulation element or the diaphragm drive unit that drives optical diaphragm.In this case, because possess optical modulation element drive unit or diaphragm drive unit, so, can implement accurate light quantity and regulate by electronically controlling optical modulation element or optical diaphragm.
In addition, in another concrete scheme of above-mentioned lighting device, the optical diaphragm drive unit is a motor.In this case, can constitute the diaphragm drive unit, can select best structure with the adaptating lighting Design of device with various motor commonly used.
In addition, in another concrete scheme of above-mentioned lighting device, further possesses the motor reel loading component that the motor reel of motor is loaded to the axial direction of this motor reel.In this case, even the motor reel at motor is axially producing under the situation of position deviation, also can be by motor reel being loaded to axial direction by the motor reel loading component, can prevent the position deviation of motor reel, the light quantity that promptly can critically implement to be undertaken by optical diaphragm is regulated.
In addition, in another concrete scheme of above-mentioned lighting device, the diaphragm drive unit drives by electromagnet.In this case, for example, can adopt structure with the driving optical diaphragms such as conversion of the magnetic pole in the electromagnet.Thereby, when can realizing the driving of optical diaphragm, can also promptly implement the driving of optical diaphragm with simple structure, that is, the light quantity that can promptly implement to be undertaken by optical diaphragm is regulated.
In addition, in another concrete scheme of above-mentioned lighting device, shade be stagewise make through light quantity and change.In this case, Yi Bian on one side because there is no need that shade is critically carried out inching controls, so the driving mechanism of shade can be provided with more succinct.
In addition, in another concrete scheme of above-mentioned lighting device, optical diaphragm branch two-stage is carried out work so that see through light quantity and change.In this case, be easy to the answer speed of optical diaphragm is made as definite value, in addition, can be fairly simple and cheap by the light quantity adjusting that optical diaphragm carries out.
In addition, in another concrete scheme of above-mentioned lighting device, further have shade is installed in respect to the installing component on the assigned position of light source.And, installing component with can with from the lighting optical axis plane orthogonal of the illumination light of light source in form that shade is carried out adjusting the position constitute.In this case, even produce design error at shade, can not by this shade with the illumination light shading under the situation of the illumination intensity of setting, also can be by installing component is carried out the position adjustment, the position of change shade, the illumination intensity that can obtain to set.
In addition, in another concrete scheme of above-mentioned lighting device, shade partly covers the light beam that is penetrated by light source near the side conjugate position of light source.In this case, can near the conjugate position of light source, implement the shading of shade, can reduce from the illumination inequality of the light beam of lighting device ejaculation.
In addition, in another concrete scheme of above-mentioned lighting device, further possesses the light beam segmenting device that constitutes by to the beam cutting element cut apart from the illumination light of light source and collective optics that a plurality of light beams of being cut apart by this beam cutting element are carried out optically focused.And shade is configured between beam cutting element and the collective optics.Under the situation that possesses such light beam segmenting device, can between beam cutting element and collective optics, be the optical characteristics generation predetermined gap of collective optics according to these beam cutting elements.That is,, can make the lighting device compactness, realize the miniaturization of lighting device by between this gap, disposing shade.
In addition, in another concrete scheme of above-mentioned lighting device, light source drive device changes the amount of emitted light of light source continuously.In this case, brightness that can correspondence image changes gently changes contrast.
In addition, in another concrete scheme of above-mentioned lighting device, further has the control device that makes light source drive device and shade have connection ground to carry out work.In this case, the brightness regulation of the illumination light of carrying out according to the characteristic of light source, shade becomes possibility.
In addition, in another concrete scheme of above-mentioned lighting device, control device further has allocation table and judge to use the judging part of the some combinations among this allocation table, and this allocation table includes with the amount of emitted light of the light source of the illumination light quantity that realizes setting with corresponding to the relevant information of combination by the shading parameter of the regulated quantity of shade generation.In this case, can engage the behaviour in service of lighting device etc., promptly obtain with as the corresponding light source drive device of dim light amount of target and the best actuating quantity of shade.
In addition, in another concrete scheme of above-mentioned lighting device, judging part uses the judgment standard of the some combinations among the allocation table according to the temperature switching judging of light source.In this case, can make light source more efficiently and stably carry out work.
In addition, in another concrete scheme of above-mentioned lighting device, shade is for partly covering the optical diaphragm of the illumination light of light source, and control device makes optical diaphragm carry out work in the scope of the regulation regulated quantity below 6 grades that is formed by optical diaphragm.In this case, only need directly drive optical diaphragm with the stepping motor of cheapness and can realize accurate action.
In addition, in another concrete scheme of above-mentioned lighting device, the regulated quantity of regulation is set in the scope of grading of the curve after the regulated quantity march linearize that will form with the corresponding shading parameter of the drive amount of optical diaphragm with by optical diaphragm.In this case, the tolerance of error of the drive amount of relevant optical diaphragm can be chosen significantly, accurate contrast adjustment can be carried out.
In addition, in another concrete scheme of above-mentioned lighting device, control device make the light source that is undertaken by light source drive device amount of emitted light minimizing than the minimizing of the illumination light of being undertaken more preferably by shade.In this case, can reduce the heating that produces by light source, shade.
In addition, in another concrete scheme of above-mentioned lighting device, the temperature measuring equipment that further has the temperature of measurement light source, control device, under the temperature of light source situation for the following low temperature of regulation, make the minimizing of the illumination light of being undertaken by shade compare the light source that is undertaken by light source drive device amount of emitted light minimizing more preferably.In this case, the temperature that can guarantee light source is also stably carried out work more than regulation.
In addition, projector of the present invention, possess the optic modulating device of above-mentioned lighting device, illuminated device illumination, with the picture of optic modulating device to the object projection lens projecting.In this case, because can and stably regulate the brightness of illumination light multiple light source leap relative broad range, so the contrast of projection image increases, the expressive force of dark part strengthens.
In addition, another projector of the present invention, possess the picture of above-mentioned lighting device, a plurality of optic modulating devices of illuminated device illumination, synthetic a plurality of optic modulating devices combining optical, the picture through the synthetic a plurality of optic modulating devices of synthetic optical system will be carried out projection lens projecting to object.This situation too because can cross over relative broad range and stably regulate the brightness of illumination light multiple light source, so the contrast of projection image increases, the expressive force of dark part strengthens.
Description of drawings
Fig. 1 is the stereographic map of outward appearance of the projector of expression the 1st embodiment.
Fig. 2 is the in-built figure of the projector of key diagram 1.
Fig. 3 is the figure that the switching light-blocking member in the optical system that is arranged on Fig. 2 is described.
Fig. 4 is the block diagram that the circuit formation of control system schematically is described.
Fig. 5 is the figure of the using method of explanation allocation table.
Fig. 6 is the process flow diagram of the setting of explanation mode of operation.
Fig. 7 is the chart of the relation of explanation rotation angle of shadow shield and illumination intensity.
Fig. 8 is the stereographic map of a part of the lighting device of explanation the 4th embodiment.
Fig. 9 is the figure of configuration of the switching light-blocking member of key diagram 8.
Figure 10 is the stereographic map of a part of the lighting device of explanation the 5th embodiment.
Figure 11 is the front elevation of the switching light-blocking member of Figure 10.
Figure 12 is the rear view of the switching light-blocking member of Figure 10.
Figure 13 is the vertical view of the switching, light shading parts of Figure 10.
Figure 14 is the figure of work of the switching light-blocking member of explanation Figure 10.
Embodiment
The 1st embodiment
Below, the projector of the lighting device that is assembled with the 1st embodiment of the present invention is described.
Fig. 1 is the stereographic map of the outward appearance of expression projector 10, the front that is formed on rectangular-shaped housing 12 embeds the structure that projecting lens 14 is arranged, near above the projecting lens 14, be formed with user-friendly operating portion 16, be formed with (figure do not show) such as connectors overleaf.In addition, in the front that is protruding with projecting lens 14, contiguous projecting lens 14 is formed with cancellate blow vent 18.
Fig. 2 is the vertical view of inside of expression projector 10, mainly is the figure that the structure to optical system describes.This projector 10 projecting lens 14 that also illustrates in Fig. 1, mainly also possesses lighting device and cuts apart modulation optical system 40 with optical system 20 and look.In addition, though omitted diagram, overlap disposing main circuit toply, being equiped with the circuit substrate of various driving circuits etc. of these optical systems 14,20,40.
Lighting device possesses with optical system 20 illuminator 21 arranged, as the 1st fly lens 22 of beam cutting element, open and close light-blocking member 23, the light-blocking member 24 of slit-shaped, the 2nd fly lens 25, polarization member 26 and overlapping lens Ls as collective optics.At this, illuminator 21 is the high-pressure mercury-vapor lamps that have mutatis mutandis concave mirror, can make amount of emitted light inching in 100%～about 70% scope.In addition, the 1st fly lens 22 will be cut apart individually to carry out optically focused from the light source light of illuminator 21 by a plurality of important document lens that are rectangular configuration.Open and close light-blocking member 23 and be the optical diaphragm that the shadow shield by a pair of rectangle constitutes, by these shadow shields are are synchronously opened and closed with same angle with respect to optical axis OA, the illumination light intensity that penetrates from the 1st fly lens 22 can be covered in 100%～about 50% scope.The light-blocking member 24 of slit-shaped is the parts that are used to prevent parasitic light, is configured on the boundary position of each the important document lens that constitutes the 2nd fly lens 25 with avoiding light path.The 2nd fly lens 25 has a plurality of important document lens that are rectangular configuration, by these important document lens, form uniform diverging light according to each 2 secondary light source that forms by the 1st fly lens 22, penetrate the uniform illumination light that overlaps on the light valve described later (optic modulating device).That is, light beam segmenting device of the present invention is equivalent to the 1st fly lens 22 and the 2nd fly lens 25.Polarization member 26, the polarized component that will be transformed into prescribed direction just from the illumination light that the 2nd fly lens 25 penetrates is supplied with level optical system backward.Overlapping lens Ls suitably converges the illumination light through polarization member 26, can carry out the overlapping illumination that look is cut apart the light valve in the modulation optical system 40.
Lighting device possesses to make from lighting device and cuts apart the catoptron 32 that modulation optical system 40 is transferred with the optical axis direction look of the ejaculation light of optical system 20 ejaculations with the back level of optical system 20.
Look is cut apart modulation optical system 40 and is possessed the 1st and the 2nd dichronic mirror 41,42; 3 object lens 43a～43c; 3 light valve 44a～44c; And cross colour splitting prism 45.By the light of the 1st look of the 1st dichronic mirror 41 reflection, via mirror M 1 and object lens 43a to light valve 44a incident.Transmission the 1st dichronic mirror 41 and by the light of the 2nd look of the 2nd dichronic mirror 42 reflection, via object lens 43b to light valve 44b incident.The light of the 3rd look of transmission the 1st and the 2nd dichronic mirror 41,42, after through relay lens R1, mirror M 2, relay lens R2 and mirror M 3, via object lens 43c to light valve 44c incident.Incide the light of 3 looks on each light valve 44a～44c respectively, synthetic by cross colour splitting prism 45 after respectively by their modulation as combining optical, penetrate from the one side.
Synthetic light from cross colour splitting prism 45 penetrates incides projecting lens 14.In addition, the picture light from cross colour splitting prism 45 penetrates via projecting lens 14, projects in the screen (figure does not show) that is located at projector 10 outsides with suitable magnification.
In housing 12, as the miscellaneous part that constitutes lighting device, also be provided with and possess the air-cooling apparatus 27 that is used for fan that illuminator 21 is cooled off, be used for illuminator 21 is carried out light modulation and makes its lamp exciting bank 28 with stable status work simultaneously, makes and open and close the driven for opening and closing device 29 of light-blocking member 23 with suitable timing on-off action.And then, in housing 12, also be provided with and possess the supply unit 50 that is used for cutting apart the air-cooling apparatus 47 of the light valve 44a～44c of modulation optical system 40 and the fan that periphery cools off thereof, supplies with the electric power of each work that is used to make projector 10 constituting look.
Fig. 3 is an illumination apparatus with the structure of the switching light-blocking member 23 that is provided with in the optical system 20 and the figure that function describes.As seen from the figure, light-blocking member 23 has shadow shield 23a, the 23b of a pair of rectangle, and these shadow shields 23a, 23b are rotated configuration freely in the mode that can make its fore-end be positioned at the 2nd fly lens 25 sides.And, synchronously opening and closing angle same θ by making these shadow shields 23a, 23b, can partly cover from the optical path of illuminating light of the 1st fly lens 22 near the side conjugate position of illuminator 21 to the 2nd fly lens 25.Thus, can make illumination light maximum attenuation to 50% from illuminator 21.The rotation angle of two shadow shield 23a, 23b can make its stagewise ground change the state representation maximum close position of solid line, the state representation release position of dotted line by the stepping motor that is arranged on the driven for opening and closing device 29 (with reference to Fig. 2).In the maximum close position, only partly incide the 2nd fly lens 25 from the center side among the illumination light of the 1st fly lens 22, the light in the outside is covered by two shadow shield 23a, 23b.In addition, also can be on the surface of shadow shield 23a, 23b, the reflection that applies the reflection that prevents light beam prevents to handle, and constitutes to the mode of the 1st fly lens 22 lateral reflections not make the light beam that is covered.For example, form antireflection film, apply fabric, prevent the reflection of incident beam on the surface of shadow shield 23a, 23b by surface at shadow shield 23a, 23b.
Fig. 4 is the block diagram that the explanation of signal is built in the circuit formation of the control system in the projector 10.From the vision signal of video input terminal, suitably processed via image analysis circuit 61, resizing circuit 62 and gain adjustment circuit 63, be used for the driving of light valve 44a (44b, 44c).At this, image analysis circuit 61 according to the relevant monochrome informations such as Luminance Distribution of the vision signal extraction of being imported with image, is exported to the CPU71 that is located in the lighting device 120.Particularly, for example can come composing images parser circuitry 61, in this case, can export the maximal value of brightness by corresponding each picture with the circuit that is called peak holding circuit that corresponding each frame resets.Resizing circuit 62 is that the image resolution ratio to the image of being imported changes so that the corresponding image resolution ratio varying circuit of pixel quantity of itself and light valve 44a (44b, 44c).Gain adjustment circuit 63 is adjusted luminance signal according to the illumination light intensity that penetrates from lighting device 120, can be by moving the contrast that improves projected image best with the association of lighting device 120.
In lighting device 120, as the CPU71 of control device, make lamp exciting bank 28, motor drive circuit 29a work, thus according to the Luminance Distribution adjustment illumination light intensity of each projected image according to the monochrome information that obtains by image analysis circuit 61.At this, lamp exciting bank 28 has the luminous quantity control circuit as light source drive device, according to from the instruction of CPU71 the amount of emitted light of illuminator 21 being adjusted into desired value.In addition, motor drive circuit 29a, driving is arranged on motor 29b, the 29c on each shadow shield 23a, 23b, and two shadow shield 23a, 23b are remained on the open and-shut mode that is made as target, will be to the intensity adjustments of the illumination light of light valve 44a (44b, 44c) incident to desired value.At this, motor drive circuit 29a and motor 29b, 29c, the driven for opening and closing device 29 of pie graph 2.
Temperature sensor 72 is the temperature that are used to monitor illuminator 21.CPU71 to the command signal of fan drive circuit 73 output coolings, makes the fan 27a work that is located on the air-cooling apparatus 27 according to the testing result of temperature sensor 72.Specifically,, increase, illuminator 21 is cooled off along with this temperature makes the rotating speed of fan 27a when the temperature of illuminator 21 reaches regulation when above.In addition, when the temperature of illuminator 21 drops to regulation when following, make the rotating speed reduction of fan 27a.In addition, the temperature of illuminator 21 than the also low situation of the lower limit of regulation under, CPU71 can make illuminator 21 become big state (heated condition) work down at amount of emitted light.Thus, can send the light source light of stable object brightness by illuminator 21.
Following table 1 example be built in allocation table in the subsidiary memory storage 75 that CPU71 arranged.This allocation table is to provide the data that are used for the combination of light valve 44a (44b, 44c) being thrown light on desired light quantity, is to have constituted that be used to obtain should be to the data on the basis of the command signal of lamp exciting bank 28, motor drive circuit 29 outputs.Specifically, stored amount of emitted light SI by illuminator 21 (being the relative intensity under 100% the situation with high-high brightness) and be located at the light extinction rate that the combination of the rotation angle θ that opens and closes shadow shield 23a, 23b on the light-blocking member 23 is reached.At this, rotation angle θ is called the value of shading parameter, to each shading parameter, divide that to be equipped with maximum transmission be 100% o'clock relative transmitance---be light extinction rate.
Table 1
| Shadow shield | Lamp amount of emitted light SI | |||||||||||||
| Angle θ | Shading rate | ??100％ | ??98％ | ??95％ | ??93％ | ??90％ | ??88％ | ??85％ | ??83％ | ??80％ | ??78％ | ??75％ | ??73％ | ??70％ |
| ??0° | ??100％ | ??100％ | ??98％ | ??95％ | ??93％ | ??90％ | ??88％ | ??85％ | ??83％ | ??80％ | ??78％ | ??75％ | ??73％ | ??70％ |
| ??2° | ??100％ | ??100％ | ??98％ | ??95％ | ??93％ | ??90％ | ??88％ | ??85％ | ??83％ | ??80％ | ??78％ | ??75％ | ??73％ | ??70％ |
| ??4° | ??100％ | ??100％ | ??97％ | ??95％ | ??92％ | ??90％ | ??87％ | ??85％ | ??82％ | ??80％ | ??77％ | ??75％ | ??72％ | ??70％ |
| ??6° | ??98％ | ??98％ | ??95％ | ??93％ | ??90％ | ??88％ | ??86％ | ??83％ | ??81％ | ??78％ | ??76％ | ??73％ | ??71％ | ??68％ |
| ??8° | ??95％ | ??95％ | ??93％ | ??90％ | ??88％ | ??86％ | ??83％ | ??81％ | ??79％ | ??76％ | ??74％ | ??71％ | ??69％ | ??67％ |
| ??10° | ??94％ | ??94％ | ??92％ | ??89％ | ??87％ | ??85％ | ??82％ | ??80％ | ??78％ | ??75％ | ??73％ | ??71％ | ??68％ | ??66％ |
| ??12° | ??94％ | ??94％ | ??92％ | ??89％ | ??87％ | ??85％ | ??82％ | ??80％ | ??78％ | ??75％ | ??73％ | ??71％ | ??68％ | ??66％ |
| ??14° | ??94％ | ??94％ | ??92％ | ??89％ | ??87％ | ??85％ | ??82％ | ??80％ | ??78％ | ??75％ | ??73％ | ??71％ | ??68％ | ??66％ |
| ??16° | ??92％ | ??92％ | ??90％ | ??88％ | ??85％ | ??83％ | ??81％ | ??78％ | ??76％ | ??74％ | ??71％ | ??69％ | ??67％ | ??65％ |
| ??18° | ??88％ | ??88％ | ??86％ | ??84％ | ??82％ | ??80％ | ??77％ | ??75％ | ??73％ | ??71％ | ??69％ | ??66％ | ??64％ | ??62％ |
| ??20° | ??85％ | ??85％ | ??83％ | ??81％ | ??78％ | ??76％ | ??74％ | ??72％ | ??70％ | ??68％ | ??66％ | ??64％ | ??61％ | ??59％ |
| ??22° | ??84％ | ??84％ | ??82％ | ??80％ | ??77％ | ??75％ | ??73％ | ??71％ | ??69％ | ??67％ | ??65％ | ??63％ | ??61％ | ??59％ |
| ??24° | ??84％ | ??84％ | ??81％ | ??79％ | ??77％ | ??75％ | ??73％ | ??71％ | ??69％ | ??67％ | ??65％ | ??63％ | ??61％ | ??59％ |
| ??26° | ??82％ | ??82％ | ??80％ | ??78％ | ??76％ | ??74％ | ??72％ | ??69％ | ??67％ | ??65％ | ??63％ | ??61％ | ??59％ | ??57％ |
| ??28° | ??78％ | ??78％ | ??76％ | ??74％ | ??72％ | ??70％ | ??68％ | ??66％ | ??64％ | ??62％ | ??60％ | ??58％ | ??56％ | ??54％ |
| ??30° | ??72％ | ??72％ | ??71％ | ??69％ | ??67％ | ??65％ | ??63％ | ??61％ | ??60％ | ??58％ | ??56％ | ??54％ | ??52％ | ??51％ |
| ??32° | ??68％ | ??68％ | ??66％ | ??64％ | ??63％ | ??61％ | ??59％ | ??58％ | ??56％ | ??54％ | ??53％ | ??51％ | ??49％ | ??48％ |
| ??34° | ??66％ | ??66％ | ??65％ | ??63％ | ??61％ | ??60％ | ??58％ | ??56％ | ??55％ | ??53％ | ??51％ | ??50％ | ??48％ | ??46％ |
| ??36° | ??66％ | ??66％ | ??64％ | ??63％ | ??61％ | ??59％ | ??58％ | ??56％ | ??54％ | ??53％ | ??51％ | ??49％ | ??48％ | ??46％ |
| ??38° | ??63％ | ??63％ | ??62％ | ??60％ | ??59％ | ??57％ | ??56％ | ??54％ | ??53％ | ??51％ | ??49％ | ??48％ | ??46％ | ??44％ |
| ??40° | ??58％ | ??58％ | ??57％ | ??55％ | ??54％ | ??53％ | ??51％ | ??50％ | ??48％ | ??47％ | ??45％ | ??44％ | ??42％ | ??41％ |
| ??42° | ??50％ | ??50％ | ??49％ | ??48％ | ??46％ | ??45％ | ??44％ | ??43％ | ??41％ | ??40％ | ??39％ | ??38％ | ??36％ | ??35％ |
In this allocation table, the scope of light extinction rate reaches from 100% to 35% scope.That is to say, can with almost continuously dim light to 35% illumination light quantity of the high-high brightness of illuminator 21 light valve 44a (44b, 44c) is thrown light on.That is, can realize considerably beyond the light extinction rate of the intensity adjustments scope of the independent illumination light of illuminator 21.This means the illumination light quantity that can change light valve 44a～44c in a wide range, can improve contrast, can strengthen the expressive force of dark part especially by 14 projects images of projecting lens.
In addition, if supposition is by opening and closing light-blocking member 23 independent dim lights to 35% of the intensity of light source, then because of can being converted into heat by 65% light of dim light, thus be necessary to guarantee fully to open and close the heat radiation of light-blocking member 23, but this is not to be easy to.On the other hand, under the situation of the present embodiment, because in advance with the amount of emitted light dim light to 70% of illuminator 21, the quantitative change that is converted to heat owing to the shading that opens and closes light-blocking member 23 has become 35%.If the heat of this degree just there is no need to add again air-cooling apparatus 27 etc., just can solve overheated problem as long as carry out around switching light-blocking member 23, processing such as heat radiator, heat-conducting plate being set, can constitute machine integral body simply.
Fig. 5 is the figure of the using method of the allocation table shown in the instruction card 1.In the allocation table of Fig. 5, realize that the rotation angle θ of same light extinction rate and the combination of amount of emitted light SI have a plurality of.Therefore, in the work of reality, be necessary and select a rotation angle θ and amount of emitted light SI accordingly as the light extinction rate of target.In order to carry out this judgement, used the path A～E of example shown in Fig. 5.
For example, the path of representing with label A is the state that preferentially carries out light modulation by illuminator 21, carrying out under the situation of light modulation with this mode of operation A, initial rotation angle θ=0 that opens and closes light-blocking member 23 of setting, the amount of emitted light of illuminator 21 is reduced, in its stage (70%) that reaches lower limit, switch to by rotation angle θ and carry out dim light, make the light quantity of illumination light reduce to lower limit (35%).The path of representing with label C is the state that makes the light modulation equilibrium of being undertaken by illuminator 21 and switching light-blocking member 23, carrying out under the situation of light modulation with this mode of operation C, opening and closing the rotation angle θ of light-blocking member 23 and the amount of emitted light SI of illuminator 21 and reduce with identical ratio.In addition, with the path shown in the label E serves as preferably by opening and closing the state that light-blocking member 23 carries out light modulation, carrying out under the situation of light modulation with this mode of operation E, the amount of emitted light SI that guarantees illuminator 21 at first reduces gradually for the maximum rotation angle θ that opens and closes light-blocking member 23 that only makes, switch to by illuminator 21 in its stage (50%) that arrives lower limit and to carry out dim light, make the light quantity of illumination light reduce to lower limit (35%).
In addition, under situation, carry out light modulation with the path of the centre of path A and path C with the mode of operation B shown in the B of path.That is, form by illuminator 21 and carry out the relatively preferential state of light modulation.In addition, under the situation with the mode of operation D shown in the D of path, carry out light modulation with the path of the centre of path E and path C.That is, form by opening and closing light-blocking member 23 and carry out the relatively preferential state of light modulation.
Select any among the mode of operation A～E shown in Fig. 5, can specify by the user, but in the initial setting of projector 10, preferentially the mode of operation A that carries out light modulation by illuminator 21 becomes substantially.Promptly, the output of illuminator 21 can be set in necessary Min.,, can eliminate the waste that consumes electric power so heating can be suppressed at bottom line by preferentially carrying out light modulation by illuminator 21.On the other hand, work on if reach at the amount of emitted light of illuminator 21 under the state of lower limit, then because kind, the environment for use difference of illuminator 21, the temperature that the has an illuminator 21 low possibility that descended.Under the situation of the illuminator 21 of particular types, if do not make it under the state of the high temperature that keeps certain limit, carry out work, then bring harmful effect can for the life-span of lamp, perhaps the luminance instability etc. that becomes.According to this situation, reached under the situation below the set point of temperature detecting illuminator 21 by temperature sensor 72, can be set at and the cooling of being undertaken by fan 27a is reduced but also mode of operation is switched to the work that opens and closes light-blocking member 23 mode of operation B～E more preferably that makes.In this case, select and the corresponding table of path A～E arbitrarily, can take into account the stable work of illuminator 21 and the heating of illuminator 21 and reduce this 2 purposes according to the temperature of illuminator 21.
Below, the work example of the projector 10 of embodiment 1 is described.When vision signal during to projector 10 input, is exported to CPU71 by the brightness peak that image analysis circuit 61 detects in the image via video input terminal from vision signal.In the resizing circuit 62 secondarily, image resolution ratio to vision signal is carried out suitable conversion, makes the pixel count of its suitable light valve 44a (44b, 44c), in the gain adjustment circuit 63 secondarily, according to instruction, adjust the luminance signal in the vision signal from CPU71.At this, CPU71 exports to gain adjustment circuit 63 according to the brightness peak decision amount of gain adjustment of the image that is obtained by image analysis circuit 61 with its result.For example, be under 50% the situation of the higher limit Imax of the brightness of projector 10 input, amount of gain adjustment AG to be made as 2 times at the brightness peak Ip of image.In this case, be necessary to make the illumination light quantity of light valve 44a (44b, 44c) to reduce to 50%, and, can realize this dim light by light modulation of being undertaken by illuminator 21 and the light modulation of being undertaken by switching light-blocking member 23.Promptly, mode of operation A～E according to Fig. 5 is some selected, CPU71 selects to carry out dim light with the some combinations in the table 1, will export to lamp exciting bank 28 and motor drive circuit 29 with the corresponding instruction of burden rate of the dim light that is undertaken by illuminator 21 and switching light-blocking member 23.Thus, lamp exciting bank 28, motor drive circuit 29 are suitably worked, with will from lighting device 120 penetrate the illumination light quantity---the illumination light quantity that is light valve 44a (44b, 44c) is set at suitable value (being 50%) above-mentioned example.Thus, under the situation of the lower image of the brightness peak Ip of image, by the illumination light amount is carried out dim light can reproduce darker black, with illumination light quantity 100% in compare in vain the time, can carry out the demonstration of high-contrast.For example, drop at the peak value of the brightness of image under 35% the situation,, can show the image of 3 times contrast with simple calculating.
Fig. 6 is the process flow diagram that the example to the setting of the mode of operation of relevant light modulation describes, and is the figure as the work of judging part of explanation CPU71.At first, according to the testing result of temperature sensor 72, judge that illuminator 21 is whether below set point of temperature---be low-temperature space work (step S11).When in step S11, being judged as under the situation of "No", be set at the basic mode of operation A (step S12) that preferentially carries out light modulation by illuminator 21.On the contrary, when in step S11, being judged as under the situation of "Yes", judge whether the temperature of illuminator 21 further surpasses lower limit (step S13).When in this step S13, being judged as under the situation of "No", temperature as illuminator 21 is lower temperature and the situation that has the possibility of job insecurity, and current mode of operation change is formed the mode of operation of preferentially being carried out dim light by switching light-blocking member 23 for 1 grade.For example, under the current situation that is set at mode of operation A shown in Figure 5, change 1 grade and form the mode of operation B (step S14) that partly uses switching light-blocking member 23.On the other hand, when in step S13, being judged as under the situation of "Yes", fully in the high situation of the possibility of low-temperature condition and job insecurity, current mode of operation is changed to override is carried out dim light by switching light-blocking member 23 mode of operation E (step S15) as illuminator 21.
The 2nd embodiment
Below, the lighting device of the 2nd embodiment of the present invention is described.In the lighting device of the 2nd embodiment, make switching light-blocking member 23 carry out work with the rotation angle below 6 grades.Under the situation that the motor 29b, the 29c that are located on the switching light-blocking member 23 are made of stepping motor, can critically control the rotation angle of shadow shield 23a, 23b, but motor is relatively more expensive.That is,, be necessary that the stepping angle with stepping motor is made as about 1 degree, or mechanism such as reduction gearing is set, so realizing having formed obstacle aspect small-sized, the cheap lighting device in order to guarantee the resolution characteristic of intensification modulation with stepping motor.Therefore, in the present embodiment,, form the structure that directly drives shadow shield 23a, 23b by the less expensive stepping motor of stepping angle more than about 10 degree.
Following table 2 is allocation tables of selected table 1 part, and the situation that drives shadow shield 23a, 23b with 10 degree units is described.In this case, because be discontinuous value, so the continuous dim light by illuminator 21 is to regulating therebetween by opening and closing the shading that light-blocking member 23 carries out.This situation leaves to make by illuminator 21 and carries out dim light and carry out the some preferential degree of freedom of dim light by opening and closing light-blocking member 23 too, can carry out and mode of operation shown in Figure 6 is switched same mode switch.
Table 2
| Shadow shield | Lamp amount of emitted light SI | |||||||||||||
| Angle θ | Shading rate | 100％ | ??98％ | ??95％ | ??93％ | ??90％ | ??88％ | ??85％ | ??83％ | ??80％ | ??78％ | ??75％ | ??73％ | ??70％ |
| ??0° | ??100％ | 100％ | ??98％ | ??95％ | ??93％ | ??90％ | ??88％ | ??85％ | ??83％ | ??80％ | ??78％ | ??75％ | ??73％ | ??70％ |
| ??10° | ??94％ | 94％ | ??92％ | ??89％ | ??87％ | ??85％ | ??82％ | ??80％ | ??78％ | ??75％ | ??73％ | ??71％ | ??68％ | ??66％ |
| ??20° | ??85％ | 85％ | ??83％ | ??81％ | ??78％ | ??76％ | ??74％ | ??72％ | ??70％ | ??68％ | ??66％ | ??64％ | ??61％ | ??59％ |
| ??30° | ??72％ | 72％ | ??71％ | ??69％ | ??67％ | ??65％ | ??63％ | ??61％ | ??60％ | ??58％ | ??56％ | ??54％ | ??52％ | ??51％ |
| ??40° | ??58％ | 58％ | ??57％ | ??55％ | ??54％ | ??53％ | ??51％ | ??50％ | ??48％ | ??47％ | ??45％ | ??44％ | ??42％ | ??41％ |
The 3rd embodiment
Below, the lighting device of the 3rd embodiment of the present invention is described.The lighting device of the 3rd embodiment is the variation of the lighting device of the 2nd embodiment.
Fig. 7 is the chart that explanation opens and closes the relation of the rotation angle of shadow shield 23a, 23b in the light-blocking member 23 and illumination intensity at that time (adjustment amount).Curve by chart can find out obviously that illumination intensity is not along with the same degree of the increase of rotation angle ground reduces, but the change of illumination intensity---the big angular area of change that is soft angular area and illumination intensity alternately repeats.That is, obtain light extinction rate and be the curve that changes along with rotation angle step-likely.This be since from the light beam of the 1st fly lens 22 each important document lens (unit) converge and simultaneously by shadow shield 23a, 23b between (with reference to Fig. 3) of causing.By between such important document lens the time, the change of illumination light intensity does not almost have at the front end of shadow shield 23a, 23b, and at the front end of shadow shield 23a, 23b during by important document lens positive, the change of illumination light intensity becomes big.The angle intervals of this change, the rate of change etc. change according to the size of shadow shield 23a, 23b, configuration etc., but then are constant in the shadow shield 23a, the 23b that already set.
If utilize this specific character of Fig. 7, the allowable value of the driving precision of the shadow shield 23a, the 23b that are undertaken by driven for opening and closing device 29 is increased.That is, be set in the scope that the curve medium dip of Fig. 7 relaxes, even then there is small deviation to occur on shadow shield 23a, 23 the rotation angle influence that also is difficult to produce light extinction rate by rotation angle with shadow shield 23a, 23b.That is, can realize the high quality images projection by high-precision light modulation.
Following table 3 is allocation tables of the part in the selected table 1, and the situation that the angle allowable value that makes shadow shield 23a, 23b is increased describes.In this case, the stepping angle rotation with 11 degree drives shadow shield 23a, 23b.
Table 3
| Shadow shield | Lamp amount of emitted light SI | |||||||||||||
| Angle θ | Shading rate | ??100％ | ??98％ | ??95％ | ??93％ | ??90％ | ??88％ | ??85％ | ??83％ | ??80％ | ??78％ | ??75％ | ??73％ | ??70％ |
| ??0° | ??100％ | ??100％ | ??98％ | ??95％ | ??93％ | ??90％ | ??88％ | ??85％ | ??83％ | ??80％ | ??78％ | ??75％ | ??73％ | ??70％ |
| ??11° | ??94％ | ??94％ | ??92％ | ??89％ | ??87％ | ??85％ | ??82％ | ??80％ | ??78％ | ??75％ | ??73％ | ??71％ | ??68％ | ??66％ |
| ??22° | ??84％ | ??84％ | ??82％ | ??80％ | ??77％ | ??75％ | ??73％ | ??71％ | ??69％ | ??67％ | ??65％ | ??63％ | ??61％ | ??59％ |
| ??33° | ??67％ | ??67％ | ??66％ | ??64％ | ??62％ | ??61％ | ??59％ | ??57％ | ??56％ | ??54％ | ??52％ | ??51％ | ??49％ | ??47％ |
The 4th embodiment
Below, the lighting device of the 4th embodiment of the present invention is described.In the lighting device of the 4th embodiment, replace the switching light-blocking member 23 of Fig. 3, use the switching light-blocking member of the slit-shaped of carrying out 2 grades of actions.
Fig. 8 is the stereographic map that the structure of the switching light-blocking member 123 in the lighting device that is assembled in the 4th embodiment is described.This opens and closes light-blocking member 123, possess and have 8 slit plate 123a, 123b respectively as a pair of shadow mask of conduct of the slit SL of peristome, by regulating the relative position of two slit plate 123a, 123b, can divide 2 grades of ground control light transmission capacities or shading amount to close (OFF)/unlatching (ON).One side's slit plate 123a forms can be by a pair of guide pins 123d, 123e guiding to A1 direction or the motion of B1 direction, the opposing party's slit plate 123b also forms and can be moved to A2 direction or B2 direction by two guide pins 123d, 123e guiding, but two slit plate 123a, 123b limit movable range by a pair of block 123g, 123h.
One side's slit plate 123a forms the spring 123i that is crossed between itself and the block 123h and loads and the upper end touches on block 123h and move confined structure to the B1 direction.The opposing party's slit plate 123b forms the spring 123j that is crossed between itself and the block 123g and loads and the upper end touches on block 123g and move confined structure to the B2 direction too.A pair of electromagnetic actuators 129a, 129b are the diaphragm drive units that carries out work according to drive signal electromagnetic type ground, overcome spring 123i, 123j respectively slit plate 123a, 123b are driven to A1 direction, A2 direction.That is, close at electromagnetic actuators 129a, 129b under the situation of (OFF), two slit plate 123a, 123b move to B1 direction and B2 direction respectively, and both slit SL roughly align, and illumination light 100% is seen through with remaining unchanged.On the other hand, under electromagnetic actuators 129a, the 129b situation for unlatching (ON), two slit plate 123a, 123b move to Al direction and A2 direction respectively instantaneously, produce the position deviation of regulation on slit SL, with illumination light dim light about 70%.When electromagnetic actuators 129a, 129b closed once more, two slit plate 123a, 123b turned back to initial position instantaneously, and slit SL roughly aligns, and illumination light is kept intact 100% see through.
Fig. 9 is the figure that explanation opens and closes the configuration of light-blocking member 123.As shown in the figure, constitute to open and close light-blocking member 123 a pair of slit plate 123a, 123b is configured in the position of tabular light-blocking member 24 equivalences of slit shown in Figure 2 on.In addition, two slit plate 123a, 123b, when electromagnetic actuators 129a, the 129b of Fig. 8 close, though promptly the slit SL that forms thereon has small position deviation but basic alignment when not hindering light path, these slits SL by with the roughly subtend ground configuration (state shown in Figure 9) of middle position of each the important document lens that constitutes the 2nd fly lens 25.Thus, even slit plate 123a, 123b also can be made as 100% with illumination light between the 1st and the 2nd fly lens 22,25.
Following table 4 is illustrated in the allocation table that uses in the lighting device of the 4th embodiment.In this case, because can be divided into unlatching, close the control of 2 grades of formulas ground and open and close light-blocking members 123, so under the situation of partly covering, can realize 72% dim light opening and closing that light-blocking member 123 is made as unlatching.Because the light extinction rate of the maximum of illuminator 21 is 70, so by by opening and closing the dim light that light-blocking member 123 carries out and the dim light of illuminator 21, maximum can free of discontinuities be implemented to the dim light about 50% continuously.
Table 4
| Slit plate | Lamp amount of emitted light SI | ||||||||||||
| Shading rate | 100％ | ???98％ | ??95％ | ??93％ | 90％ | 88％ | ?85％ | ?83％ | 80％ | ?78％ | 75％ | 73％ | 70％ |
| ????100％ | 100％ | ??98％ | ??95％ | ??93％ | 90％ | 88％ | ?85％ | ?83％ | 80％ | ?78％ | 75％ | 73％ | 70％ |
| ????72％ | 72％ | ??71％ | ??69％ | ??67％ | 65％ | 63％ | ?61％ | ?60％ | 58％ | ?56％ | 54％ | 52％ | 51％ |
In the 4th above embodiment, because can keep definitely all the time by the timing that opens and closes the on-off action that light-blocking member 123 carries out, dim light at full speed become possibility, even also can promptly tackle under the situation that the brightness of the image that is comprised in vision signal changes tempestuously.In addition, because be to use 2 grades action of cheap and small-sized actuator,, help providing of small-sized light weight and cheap machine so can be set as simple structure.
The 5th embodiment
Below, the lighting device of the 5th embodiment of the present invention is described.In the lighting device of the 5th embodiment, replace the switching light-blocking member 123 of Fig. 8, use the switching light-blocking member of the slit shape of stagewise ground work.
Figure 10 is the stereographic map that the structure of the switching light-blocking member 223 in the lighting device that is assembled in the 5th embodiment is described.Figure 11 is the front elevation that opens and closes light-blocking member 223.Figure 12 is the rear view that opens and closes light-blocking member 223.Figure 13 is the vertical view that opens and closes light-blocking member 223.In addition, in Figure 11, Fig. 12 and Figure 13, employing will be made as the Z axle from the ejaculation direction of the illumination light of illuminator 21, will the left and right directions relative with this Z axle be made as X-axis, will the above-below direction relative with this Z axle be made as the XYZ orthogonal coordinate system of Y-axis, describe opening and closing light-blocking member 223.
Open and close light-blocking member 223, between the 1st fly lens 22 and the 2nd fly lens 25, be configured near on the conjugate position of illuminator 21.This opens and closes light-blocking member 223,, possesses: as slit plate 223a, the 223b of shadow mask to shown in Figure 13 as Figure 10; Slit plate travel mechanism 224 as the shadow mask travel mechanism that these slit plates 223a, 223b are moved mutually; Pulse motor 225 as the optical diaphragm drive unit that drives this slit plate travel mechanism 224; And the installing component 226 that these slit plates 223a, 223b, slit plate travel mechanism 224 and pulse motor 225 is installed in the assigned position in the housing 12.
In addition, among four jiaos the corner portions located of slit plate 223a, 223b, be positioned on 2 corner portions located of upper side, be formed with the slotted hole 223c, the 223d that extend along directions X as shown in figure 12.In addition, in Figure 12, show slotted hole 223c, 223d among the slit plate 223a, but in slit plate 223b, be formed with this structure similarly.
In addition, ora terminalis substantial middle part on slit plate 223a, 223b, as Figure 10 or shown in Figure 13, be formed with from should go up ora terminalis to- teat 223e, 223f that the Z direction is outstanding.
At this, the last ora terminalis substantial middle part of slit plate 223b as shown in figure 10, is formed to-Y direction recessedly.That is, teat 223e more is positioned at+the Y side than teat 223f, and these teats 223e and 223f are formed mutually uninterruptedly.
Slit plate travel mechanism 224, as Figure 10 or shown in Figure 13, possess form with the directions X be axle cylindric, be the turning axle 224a of center rotation with this; 2 slide block 224b that engage with this turning axle 224a, move along the axial direction of turning axle 224a along with the rotation of turning axle 224a as moving part; Volute spring 224c between these slide blocks 224b as the moving part loading component; And the joint 224d that the motor reel 225a of turning axle 224a and pulse motor 225 is linked.
Turning axle 224a forms cylindric, and an end links by the motor reel 225a of joint 224d and pulse motor 225, and the other end is supported on the installing component 226.And, on turning axle 224a,, on the periphery between both ends, be formed with 2 thread grooves though diagram is omitted.These 2 thread grooves are separated from each other, and are positioned at-thread groove of directions X side, form with the thread groove of right-hand thread, are positioned at+thread groove of directions X side, form with the thread groove of left-hand thread (LHT).
Each slide block 224b forms the general square shape column, and the both ends of the surface that connect subtend form internal thread hole, the thread groove threaded engagement that can not show with the figure of turning axle 224a.At this, among each slide block 224b, be positioned at-the slide block 224b1 of directions X on, the thread groove of the right-hand thread that the figure of corresponding rotation axle 224a does not show forms the threaded hole of right-hand thread.On the other hand, be positioned at+the slide block 224b2 of directions X on, the thread groove of the left-hand thread (LHT) that the figure of corresponding rotation axle 224a does not show forms the threaded hole of left-hand thread (LHT).
In addition, each slide block 224b+Z direction end face on, be formed with to+Z direction extend so that to+double pointed nail 224b3,224b4 (Figure 13) that the Y direction is extended.And these double pointed nails 224b3,224b4 engage with conjugate foramen 223h, the 223j of slit plate 223a, 223b.
In addition, each slide block 224b-Y direction end face on, though diagram is omitted, be formed with to-double pointed nail that the Y direction is extended, this double pointed nail engages with the slotted hole that figure on being formed at installing component 226 does not show, in mobile, guide shoe 224b.
Joint 224d links the end of turning axle 224a and the motor reel 225a (Figure 13) of pulse motor 225.And when motor reel 225a passed through the driven in rotation of pulse motor 225, joint 224d made turning axle 224a forward or reverse according to the rotation of motor reel 225a.
Installing component 226, have the essentially rectangular shape of extending along directions X plate body 226a, be integrally formed at installation portion 226b, the 226c at the both ends of this plate body 226a.
On plate body 226a,, be formed with to+turning axle support portion 226a1 that the Y direction is outstanding at-directions X end accessory.And this turning axle support portion 226a1 can rotate freely the side's of ground supporting rotating shaft 224a end.
In addition, on plate body 226a, the directions X both ends side in+Z direction ora terminalis is formed with to+slit plate support portion 226a2 that the Y direction is outstanding.On the 226a2 of this slit plate support portion, be formed with the hole that does not show along the figure of Z direction perforation.And, as Figure 12 or shown in Figure 13, by with screw 226d via the slotted hole 223c of slit plate 223a, 223b, 223d threaded engagement in the hole that figure does not show, slit plate 223a, 223b can be supported on the 226a2 of slit plate support portion movably along directions X.
And then, on plate body 226a, be positioned at+the substantial middle part at Z direction ora terminalis place, be formed with to+locator protrusions 226a3 that the Y direction is outstanding.And otch 223g, the 223i of this locator protrusions 226a3 and slit plate 223a, 223b touch, and limit the initial position of each slit plate 223a, 223b.That is, at its initial position, under situation about seeing from the Z direction, roughly align in the position of each slit plate 223a, 223b, is in the state of slit plate that can't see both sides, not to the illumination light dim light.
Moreover, on plate body 226a, though diagram omit, be formed with that the double pointed nail that do not show with the figure of each slide block 224b engages, along the slotted hole of directions X extension, by this slotted hole, limit the moving direction of each slide block 224b.
And, to keep each parts 223a, 223b, 224, and 225 installing component 226 when being installed to assigned position housing 12 in, implement to being located on the housing for optical component that housing 12 interior figure do not show via fixing with hole 226b1 and 226c1 threaded engagement by the screw that will scheme not show.In addition, when adjusting the installation site of above-mentioned installing component 226, pass otch 226b2 by the tip of for example screwdriver etc., Yi Bian the side of screwdriver and the end face of otch 226b2 are touched, the rotation screw cutter is adjusted the installation site of installing component 226 along directions X with this on one side.
Then, the work that opens and closes light-blocking member 223 is described.In addition, below, mainly to describing by the minimizing that opens and closes the illumination intensity that light-blocking member 223 carries out.
When turning axle 224a rotates, as shown in figure 13, be threadedly coupled to the slide block 224b1 on this turning axle 224a, change the threaded engagement state with turning axle 224a, move to-directions X.In addition, meanwhile, be threadedly coupled to slide block 224b2 on the turning axle 224a and change threaded engagement state with turning axle 224a, move to+directions X.
As shown in figure 14, with moving linkedly of these slide blocks 224b, from above-mentioned initial position, slit plate 223a moves to-directions X, and slit plate 223b moves to+directions X.And by moving of these slit plates 223a, 223b, under situation about seeing from the Z direction, both sides' slit SL is staggered, reduces illumination intensity with this.
In addition, the on-off action of above-mentioned switching light-blocking member 223 with illustrated roughly the same in the 1st embodiment, the 2nd embodiment or the 3rd embodiment, be stagewise ground and carry out.That is, illumination intensity is the minimizing of staged ground.
In the 5th above embodiment, open and close light-blocking member 223, possess slit plate 223a, 223b and slit plate travel mechanism 224, by the slip travelling slit plate 223a of this slit plate travel mechanism, 223b, variable thus illumination intensity, can implement light quantity easily and promptly and regulate with simple structure.
Slit plate travel mechanism 224 possesses turning axle 224a and 2 slide block 224b1,224b2, as long as make turning axle 224a rotation, just can change the mutual position of slit plate 223a, 223b, has realized the simplicity of the structure of slit plate travel mechanism 224.And then, by the rotation angle of control turning axle 224a, can stagewise ground implement the change of illumination intensity, can be easily and implement the light quantity adjusting accurately.
Open and close the slit plate travel mechanism 224 of light-blocking member 223, possess volute spring 224c, this volute spring 224c loads to the direction that 2 slide block 224b1,224b2 are separated.Thus, the clearance at the thread groove place of slide block 224b1,224b2 and turning axle 224a can be eliminated, that is, the position deviation that produces by this clearance can be avoided.Thereby, can critically implement by opening and closing the light quantity adjusting that light-blocking member 223 carries out.
Open and close light-blocking member 223, possesses the pulse motor 225 that makes turning axle 224a rotation, thus, in can be, can also turning axle 224a be rotated minutely with the rotation angle of regulation by pulse voltage as the regulation of drive signal with 1 pulse motor, 225 driven in rotation axle 224a.Thereby, in the noise when the action that can suppress to open and close light-blocking member 223, can also implement high-precision light quantity and regulate.
The motor reel 225a of pulse motor 225, because loaded to-directions X, so when opening and closing the action of light-blocking member 223, can avoid the position deviation of motor reel 225a by motor reel loading component 230, that is, can critically implement by opening and closing the light quantity adjusting that light-blocking member 223 carries out.
On installing component 226, because on installation portion 226b, 226c, be formed with otch 226b2, fixing with hole 226b1 and the fixing hole 226c1 that uses, even produce design error on framework so have at optical device that the figure that opens and closes light-blocking member 223 and/or housing 12 does not show, the situation that can not carry out shading to illumination light with the illumination intensity of setting also can be carried out the position adjustment to installing component 226.Thereby, by changing the position that opens and closes light-blocking member 223, the illumination intensity that can obtain to set.
Open and close light-blocking member 223, because near the conjugate position configuration of illuminator 21, so can implement the shading undertaken by this switching light-blocking member 223 at the conjugate position annex of illuminator 21.Thereby, can reduce the illumination inequality of the light beam that penetrates with optical system 20 from lighting device, and can suppress the irregular colour of the projected image that projects from projecting lens 14.In addition, open and close light-blocking member 223 because be configured between the 1st fly lens 22 and the 2nd fly lens 25, even so will open and close light-blocking member 223 be arranged on lighting device with the situation in the optical system 20 under, also there is no need to carry out the design alteration of lighting device with optical system 20.Thereby, can easily be arranged on general lighting device with in the optical system 20 with opening and closing light-blocking member 223.
Though describe the present invention with regard to above embodiment, the present invention is not limited to above-mentioned embodiment.For example, CPU71 in the above-described embodiment, brightness peak according to the image that obtains from image analysis circuit 61 is exported to gain adjustment circuit 63 with the amount of gain adjustment of determining, but also can determine amount of gain adjustment or corresponding therewith light extinction rate according to the average modulation degree of the image that obtains from image analysis circuit 61, the average modulation degree in a certain regional extent.In addition, not simple average modulation degree, but according to the decision of the center of gravity after histogramization amount of gain adjustment.
In addition, in lighting device, projectors such as above-mentioned the 1st embodiment, make 23 actions of switching light-blocking member with stepping motor, but also can be by the combination driven opening light-blocking member 23 of detecting devices such as servomotor and scrambler.
In addition, in above-mentioned the 4th embodiment, make 124 actions of switching light-blocking member, but also can make single electromagnetic actuators and the combination of mechanical bindiny mechanism and two slit plate 123a, 123b are moved simultaneously by 2 electromagnetic actuators 129a, 129b.In addition, replace electromagnetic actuators 129a, 129b, also can use other drive unit such as piezoelectric element.
In addition, in above-mentioned the 5th embodiment, slit plate 223 is made of 2 slit plate 223a, 223b, but is not limited to this, constitutes also passable in the mode with the slit plate more than 2.In addition, slide block 224b is made of 2 slide block 224b1,224b2, but also can constitute in the mode that has with the corresponding slide block more than 2 of sheet number of slit plate.
In addition, in above-mentioned the 5th embodiment, installing component 226, on installation portion 226b, 226c, be formed with otch 226b2, fixing with hole 226b1 and the fixing hole 226c1 that uses, form the structure of the position adjustment of carrying out directions X only, but be not limited thereto, also can form the structure of the position adjustment that can carry out Y direction and/or Z direction.
In addition, in above-mentioned the 5th embodiment, open and close light-blocking member 223 between the 1st fly lens 22 and the 2nd fly lens 25,, but be not limited thereto with conjugate position configuration near illuminator 21.That is, can both can be configured in the back level of the 2nd fly lens 25 near the conjugate position configuration of illuminator 21, also can be configured near the conjugate position of illuminator 21 in addition as long as open and close light-blocking member 223.
In addition, in the above-described embodiment, used optical diaphragm as shade---promptly open and close light-blocking member 23,123, but replace relevant optical diaphragm, the optical modulation elements such as liquid-crystal apparatus that the optical transmission rate is changed are also passable.
Claims (24)
1. a lighting device possesses
Illuminating light source;
Regulate the light source drive device of the amount of emitted light of above-mentioned light source;
Take from the shade of the illumination light intensity of above-mentioned light source with adjusting.
2. lighting device as claimed in claim 1 is characterized in that: above-mentioned shade is to make the optical modulation element that partly sees through from the light beam of above-mentioned light source ejaculation.
3. lighting device as claimed in claim 1 is characterized in that: above-mentioned shade is the optical diaphragm that partly covers from the light beam of above-mentioned light source ejaculation.
4. lighting device as claimed in claim 3 is characterized in that: above-mentioned optical diaphragm possess have make peristome that the illumination light from above-mentioned light source sees through and will from a plurality of shadow mask of the light shielding part of the part blocking of the illumination light of above-mentioned light source and can so that above-mentioned peristome and above-mentioned light shielding part in shadow mask travel mechanism that the overlapping mode of ejaculation direction from the illumination light of above-mentioned light source moves above-mentioned a plurality of shadow mask mutually.
5. lighting device as claimed in claim 4, it is characterized in that: above-mentioned shadow mask travel mechanism have with direction from the lighting optical axis quadrature of the illumination light of above-mentioned light source on extend, serve as the turning axle of axle rotation and a plurality of moving parts of engaging with this turning axle and moving along above-mentioned turning axle direction corresponding to the rotation of turning axle with this direction; Above-mentioned a plurality of moving part engages with above-mentioned a plurality of shadow mask, moves along above-mentioned direction of principal axis corresponding to the rotation of above-mentioned turning axle, and above-mentioned a plurality of shadow mask is moved mutually.
6. lighting device as claimed in claim 5 is characterized in that: above-mentioned optical diaphragm further has the moving part loading component that above-mentioned a plurality of moving part is loaded to the direction of leaving mutually on the axial direction of above-mentioned turning axle.
7. as claim 2 or 3 described lighting devices, it is characterized in that: further have optical modulation element drive unit that drives above-mentioned optical modulation element or the diaphragm drive unit that drives above-mentioned optical diaphragm.
8. lighting device as claimed in claim 7 is characterized in that: above-mentioned optical diaphragm drive unit is a motor.
9. lighting device as claimed in claim 7 is characterized in that: above-mentioned diaphragm drive unit drives by electromagnet.
10. lighting device as claimed in claim 1 is characterized in that: above-mentioned shade is classified to make through light quantity and changes.
11. lighting device as claimed in claim 1 is characterized in that: above-mentioned shade branch two-stage is moved to make through light quantity and is changed.
12. lighting device as claimed in claim 1, it is characterized in that: further have above-mentioned shade be installed in respect to the installing component on the assigned position of above-mentioned light source, above-mentioned installing component with can with lighting optical axis plane orthogonal from the illumination light of above-mentioned light source in form that above-mentioned shade is carried out adjusting the position constitute.
13. lighting device as claimed in claim 1 is characterized in that: above-mentioned shade partly covers the light beam that is penetrated by above-mentioned light source near the side conjugate position of above-mentioned light source.
14. lighting device as claimed in claim 14, it is characterized in that: further possess the light beam segmenting device that constitutes by to the beam cutting element cut apart from the illumination light of above-mentioned light source and collective optics that a plurality of light beams of being cut apart by this beam cutting element are carried out optically focused, above-mentioned shade is configured between above-mentioned beam cutting element and the above-mentioned collective optics.
15. lighting device as claimed in claim 1 is characterized in that: above-mentioned light source drive device changes the amount of emitted light of above-mentioned light source continuously.
16. lighting device as claimed in claim 1 is characterized in that: further have the control device that makes above-mentioned light source drive device and above-mentioned shade associated ground carry out work.
17. lighting device as claimed in claim 17, it is characterized in that: above-mentioned control device further has allocation table and judge to use the judging part of the some combinations among this allocation table, and this allocation table comprises with the amount of emitted light of the above-mentioned light source of the illumination light quantity that realizes setting with corresponding to the relevant information of combination by the shading parameter of the regulated quantity of above-mentioned shade generation.
18. lighting device as claimed in claim 18 is characterized in that: above-mentioned judging part is according to the judgment standard of the some combinations among the above-mentioned allocation table of temperature switching use of above-mentioned light source.
19. lighting device as claimed in claim 18, it is characterized in that: above-mentioned shade is for partly covering the optical diaphragm of the illumination light of above-mentioned light source, and above-mentioned control device moves above-mentioned optical diaphragm in the scope of the regulation regulated quantity below 6 grades or 6 grades that is produced by above-mentioned optical diaphragm.
20. lighting device as claimed in claim 20, it is characterized in that: the afore mentioned rules regulated quantity is set in the scope of grading of the curve after the regulated quantity curveization that will form with the corresponding shading parameter of the drive amount of above-mentioned optical diaphragm with by above-mentioned optical diaphragm.
21. lighting device as claimed in claim 17 is characterized in that: above-mentioned control device makes the minimizing of the amount of emitted light of the above-mentioned light source that is undertaken by above-mentioned light source drive device, than the minimizing of the above-mentioned illumination light of being undertaken by above-mentioned shade more preferably.
22. lighting device as claimed in claim 17, it is characterized in that: the temperature measuring equipment that further has the temperature of measuring above-mentioned light source, above-mentioned control device, under the temperature of above-mentioned light source situation for the following low temperature of regulation, make the above-mentioned illumination light of being undertaken by above-mentioned shade minimizing, compare the above-mentioned light source that is undertaken by above-mentioned light source drive device amount of emitted light minimizing more preferably.
23. a projector possesses
The lighting device that claim 1 is put down in writing;
By the optic modulating device of above-mentioned lighting device lighting;
With with the picture of above-mentioned optic modulating device to the object projection lens projecting.
24. a projector possesses
The lighting device that claim 1 is put down in writing;
By a plurality of optic modulating devices of above-mentioned lighting device lighting;
The combining optical of the picture of synthetic above-mentioned a plurality of optic modulating devices; With will be through the picture of the synthetic above-mentioned a plurality of optic modulating devices of above-mentioned combining optical to the object projection lens projecting.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002298984 | 2002-10-11 | ||
| JP298984/2002 | 2002-10-11 | ||
| JP035524/2003 | 2003-02-13 | ||
| JP324342/2003 | 2003-09-17 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1497334A true CN1497334A (en) | 2004-05-19 |
| CN100363837C CN100363837C (en) | 2008-01-23 |
Family
ID=34256209
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2003101002608A Expired - Fee Related CN100363837C (en) | 2002-10-11 | 2003-10-13 | Lighting device and projector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100363837C (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102200677A (en) * | 2010-03-23 | 2011-09-28 | 精工爱普生株式会社 | Projector |
| CN101387818B (en) * | 2005-08-09 | 2011-12-07 | 株式会社日立制作所 | Projection type image display apparatus |
| US8162490B2 (en) | 2005-06-23 | 2012-04-24 | Sanyo Electric Co., Ltd. | Projection type video display apparatus |
| CN102967986A (en) * | 2011-08-30 | 2013-03-13 | 精工爱普生株式会社 | Projector and control method for projector |
| CN104735430A (en) * | 2013-12-18 | 2015-06-24 | 精工爱普生株式会社 | Projector and method of controlling projector |
| CN106990657A (en) * | 2016-01-20 | 2017-07-28 | 精工爱普生株式会社 | Projector and control method |
| CN106990656A (en) * | 2016-01-20 | 2017-07-28 | 精工爱普生株式会社 | Projector and control method |
| CN108368987A (en) * | 2015-12-14 | 2018-08-03 | 黑拉有限责任两合公司 | Lighting device for vehicle |
| CN110967930A (en) * | 2018-09-30 | 2020-04-07 | 上海微电子装备（集团）股份有限公司 | Light source attenuation device and photoetching machine |
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Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN88201376U (en) * | 1988-03-02 | 1988-11-02 | 云南省京剧院 | Four-action mechanical lamp for scenic lighting |
| JPH0566501A (en) * | 1991-09-09 | 1993-03-19 | Toshiba Corp | Projection type liquid crystal display device |
| JP3642267B2 (en) * | 2000-07-05 | 2005-04-27 | セイコーエプソン株式会社 | Illumination optical system and projector equipped with the same |
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- 2003-10-13 CN CNB2003101002608A patent/CN100363837C/en not_active Expired - Fee Related
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| US8162490B2 (en) | 2005-06-23 | 2012-04-24 | Sanyo Electric Co., Ltd. | Projection type video display apparatus |
| CN101387818B (en) * | 2005-08-09 | 2011-12-07 | 株式会社日立制作所 | Projection type image display apparatus |
| US8823885B2 (en) | 2010-03-23 | 2014-09-02 | Seiko Epson Corporation | Projector |
| CN102200677A (en) * | 2010-03-23 | 2011-09-28 | 精工爱普生株式会社 | Projector |
| US9258538B2 (en) | 2011-08-30 | 2016-02-09 | Seiko Epson Corporation | Projector and control method for projector |
| CN102967986A (en) * | 2011-08-30 | 2013-03-13 | 精工爱普生株式会社 | Projector and control method for projector |
| US9039200B2 (en) | 2011-08-30 | 2015-05-26 | Seiko Epson Corporation | Projector and control method for projector |
| CN102967986B (en) * | 2011-08-30 | 2015-05-13 | 精工爱普生株式会社 | Projector and control method for projector |
| CN104735430B (en) * | 2013-12-18 | 2018-01-12 | 精工爱普生株式会社 | The control method of projecting apparatus and projecting apparatus |
| CN104735430A (en) * | 2013-12-18 | 2015-06-24 | 精工爱普生株式会社 | Projector and method of controlling projector |
| CN108368987A (en) * | 2015-12-14 | 2018-08-03 | 黑拉有限责任两合公司 | Lighting device for vehicle |
| CN106990657A (en) * | 2016-01-20 | 2017-07-28 | 精工爱普生株式会社 | Projector and control method |
| CN106990656A (en) * | 2016-01-20 | 2017-07-28 | 精工爱普生株式会社 | Projector and control method |
| CN106990656B (en) * | 2016-01-20 | 2021-02-26 | 精工爱普生株式会社 | Projector and control method |
| CN106990657B (en) * | 2016-01-20 | 2021-03-12 | 精工爱普生株式会社 | Projector and control method |
| CN110967930A (en) * | 2018-09-30 | 2020-04-07 | 上海微电子装备（集团）股份有限公司 | Light source attenuation device and photoetching machine |
| CN110967930B (en) * | 2018-09-30 | 2021-06-11 | 上海微电子装备（集团）股份有限公司 | Light source attenuation device and photoetching machine |
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| CN100363837C (en) | 2008-01-23 |
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