CN1828403A - Projector - Google Patents

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Publication number
CN1828403A
CN1828403A CN 200610058069 CN200610058069A CN1828403A CN 1828403 A CN1828403 A CN 1828403A CN 200610058069 CN200610058069 CN 200610058069 CN 200610058069 A CN200610058069 A CN 200610058069A CN 1828403 A CN1828403 A CN 1828403A
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China
Prior art keywords
aforementioned
light
projector
transmission rate
control assembly
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Pending
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CN 200610058069
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Chinese (zh)
Inventor
秋山光一
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Seiko Epson Corp
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Seiko Epson Corp
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Publication of CN1828403A publication Critical patent/CN1828403A/en
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Abstract

A projector includes an electrooptic modulator that modulates an illumination light flux in accordance with image information; a projection optical system that projects the illumination light flux modulated at the electrooptic modulator; an illuminating system that so as to illuminate an entire image forming area in one direction on an image forming area of the electrooptic modulator and to partially illuminate the image forming area in the other direction, emits an illumination light flux having a sectional form compressed in the other direction of directions; and a rotating prism that is rotated at a constant speed so that an illumination light flux from the illuminating system scan along the other direction over the image forming area of the electrooptic modulator, wherein the projector further includes: a light transmittance control module that changes a light transmittance of the illumination light flux depending on a position of the illumination light flux over the image forming area so as to reduce a difference in illuminance caused by changes in a scanning rate of the illumination light flux over the image forming area of the electrooptic modulator.

Description

Projector
Technical field
The present invention relates to projector.
Background technology
Thereby known have by scan projector's (for example, with reference to patent documentation 1) that illuminating bundle has improved the animation display characteristic on the image forming area of liquid-crystal apparatus.
Figure 17, be for illustrate this in the past projector 900 and the figure that shows.Figure 17 (a) is the figure that shows the optical system of projector 900 in the past, Figure 17 (b) is the figure that shows for the effect that rotating prism 960 is described, Figure 17 (c) shows by making rotating prism 960 be rotated in the figure of the appearance of illuminating bundle scanning on the image forming area of liquid-crystal apparatus 970.
Figure 18 is the figure of the rotational speed of the rotating prism 960 in the projector 900 that shows in the past.
In projector 900 in the past, as shown in figure 17, by making rotating prism 960 rotations, scanning illuminating bundle L on the image forming area of liquid-crystal apparatus 970.Therefore, according to projector 900 in the past, if be conceived to point arbitrarily in the image forming area of liquid-crystal apparatus 970, then light is interdicted discontinuously, just therefore improved the animation display characteristic, will have good animation display characteristic.
In addition, in projector 900 in the past, as shown in figure 18, change by the rotational speed that makes rotating prism 960, just can be with impartial velocity sweeping illuminating bundle L on the image forming area of liquid-crystal apparatus 970.Therefore, according to projector 900 in the past, the illumination that can alleviate in the image forming area of liquid-crystal apparatus 970 is poor, can carry out more uniform demonstration on whole projecting plane.That is, has display characteristic in the uniform face.
Patent documentation 1: the spy opens the 2004-325577 communique
Summary of the invention
But, in projector 900 in the past,, therefore just occurred as the motor that is used for the driven in rotation prism owing to must in the extremely short cycle, the rotational speed of rotating prism be changed accurately, must use expensive motor, manufacturing cost increases such problem.
In addition, in projector 900 in the past, because the rotational speed of rotating prism is changed, the rotational speed that the motor of driven in rotation prism therefore just occurred being used in is quickened continually and is slowed down, and consuming electric power increases such problem.
Therefore, the present invention finishes in order to solve such problem, and its purpose is to provide a kind of display characteristic in good animation display characteristic and the uniform face that has, and can not increase the projector of the manufacturing cost or the electric power that increases consumption simultaneously.
Projector of the present invention possesses: according to the electro-optic modulation arrangement of image information modulated illumination; The projection optical system of the illuminating bundle that projection was modulated by the aforementioned electric optic modulating device; Ejaculation has the lighting device of the illuminating bundle of following cross sectional shape, described cross sectional shape is, illumination image forms the integral body in zone for side's direction of the image forming area of aforementioned electric optic modulating device, it is such that illumination image forms a regional part for the opposing party's direction, along the compressed cross sectional shape of aforementioned the opposing party's direction; And, make the illuminating bundle that comes from aforementioned illumination apparatus rotating prism along aforementioned the opposing party's scanning direction of the image forming area of aforementioned electric optic modulating device with the rotation of certain speed; It is characterized in that, further possess according to the position on the aforementioned image forming area of aforementioned illuminating bundle, the light transmission rate of illuminating bundle is changed, to alleviate the light transmission rate control device that on the image forming area of aforementioned electric optic modulating device, changes the illumination difference that produces because of the sweep velocity of aforementioned illuminating bundle.
Therefore, according to projector of the present invention,, just can on the image forming area of electro-optic modulation arrangement, scan illuminating bundle by making the rotating prism rotation.Its result, if be conceived to point arbitrarily on the image forming area of electro-optic modulation arrangement, then light is interdicted discontinuously, therefore can improve the animation display characteristic, and have good animation display characteristic.
In addition, according to projector of the present invention, because the light transmission rate of illuminating bundle is changed, therefore just can alleviate poor (because the sweep velocity of the illuminating bundle at place, the opposing party's direction both ends of the image forming area of electro-optic modulation arrangement of illumination that produces when making the rotating prism rotation with certain rotational speed, sweep velocity than the illuminating bundle at the opposing party's direction central portion place is fast, therefore the illumination at the opposing party's direction both ends of the image forming area of electro-optic modulation arrangement also the illumination than the opposing party's direction central portion is low), can carry out more uniform demonstration on whole on the projecting plane.That is, has display characteristic in the uniform face.
At this moment, just can control in such a way, promptly, when the opposing party's direction central portion of the image forming area of illuminating bundle by electro-optic modulation arrangement, the light transmission rate step-down of illuminating bundle, when the opposing party's direction both ends of the image forming area of illuminating bundle by electro-optic modulation arrangement, the light transmission rate of illuminating bundle uprises.
In addition, according to projector of the present invention, because the rotational speed of rotating prism is changed, therefore as the motor that is used for the driven in rotation prism, just need not use expensive motor, the rotational speed of the motor that is used for the driven in rotation prism of also need not quickening continually and slow down simultaneously.Therefore, just there has not been manufacturing cost to increase or consume the situation of electric power increase.
Therefore,, become and have good animation display characteristic and uniform display characteristic in the face according to projector of the present invention, and the projector that can not increase manufacturing cost or consume electric power, can realize purpose of the present invention.
In projector of the present invention, preferred aforementioned lights transmitance control device, the light transmission rate control circuit that has the light transmission rate control assembly and control the light transmission rate of aforementioned lights transmitance control assembly.
By such formation, the light transmission rate that just can correctly control illuminating bundle at an easy rate is poor to alleviate above-mentioned illumination.
In projector of the present invention, preferred aforementioned electric optic modulating device is a liquid-crystal apparatus, and then possesses the polarization conversion device that aforementioned illuminating bundle is adjusted to a kind of roughly the same linearly polarized light, aforementioned lights transmitance control assembly, the polarization plates that has the polarization direction control assembly of controlling according to the control that comes from aforementioned lights transmitance control circuit, to the aforementioned roughly polarization direction of a kind of linearly polarized light and the polarized component of the side from the illuminating bundle that aforementioned polarization direction control assembly penetrates is seen through.
At this moment, preferably aforementioned polarization plates is provided on the light emergence face of aforementioned polarization direction control assembly.In addition, preferably will be configured on the light entrance face side of aforementioned electric optic modulating device, be used to make light incident side polarization plates, use as aforementioned polarization plates to the polarization direction unanimity of the illuminating bundle of aforementioned electro-optic modulation arrangement incident.
By such formation, can be by the control of light transmission rate control circuit, make change of polarization, adjust by polarization plates or be configured in the light quantity of the illuminating bundle that the light incident side polarization plates of the light entrance face side of electro-optic modulation arrangement absorbs by the illuminating bundle of polarization direction control assembly.Therefore, can be with low consumption electric power, and correctly control the light transmission rate of illuminating bundle.
In projector of the present invention, preferred and then possess the rotation status detecting sensor of the rotation status that detects aforementioned rotating prism, aforementioned lights transmitance control circuit, according to the output signal of aforementioned rotation status detecting sensor, the light transmission rate of control aforementioned lights transmitance control assembly.
By such formation, can carry out and the corresponding correct control of the rotation status of rotating prism, therefore can alleviating sweep velocity because of illuminating bundle effectively, to change the illumination that produces on the image forming area of electro-optic modulation arrangement poor.
In projector of the present invention, preferably and then possess the image processing circuit of the processing of carrying out image information, aforementioned rotating prism is constituted as according to the synchronizing signal that comes from aforementioned image processing circuit, with certain speed rotation; Aforementioned lights transmitance control circuit, according to the synchronizing signal that comes from aforementioned image processing circuit, the light transmission rate of control aforementioned lights transmitance control assembly.
The rotation of rotating prism is carried out according to the synchronizing signal that comes from image processing circuit.Therefore, by constituting in the above described manner, therefore also can carry out and the corresponding correct control of the rotation status of rotating prism, can alleviating sweep velocity because of illuminating bundle effectively, to change the illumination that produces on the image forming area of electro-optic modulation arrangement poor.
In projector of the present invention, preferred aforementioned illumination apparatus is the projector with following formation, promptly has: possess luminotron and catoptron and penetrate the light supply apparatus of illuminating bundle to illuminated area side; Be used for to be divided into the 1st lens arra of a plurality of the 1st lenslets of having of a plurality of segment beams from the illuminating bundle that aforementioned light supply apparatus penetrates; Has the 2nd lens arra with corresponding a plurality of the 2nd lenslets of a plurality of the 1st lenslets of aforementioned the 1st lens arra; And the lighting device that is used to make the each several part light beam overlapping overlapping lens on aforementioned lights transmitance control assembly that penetrate from aforementioned a plurality of the 2nd lenslets of aforementioned the 2nd lens arra; Aforementioned the 1st lenslet has along the compressed flat shape of aforementioned the opposing party's direction.
By such formation, owing to use the lighting device that constitutes by lens integrator optical system as described above, therefore can penetrate and have the uniform illuminating bundle of Illumination Distribution in compressed cross sectional shape of the opposing party's direction and the face, can improve the light utilization ratio.Its result can constitute and has good animation display characteristic and uniform display characteristic in the face, and does not have manufacturing cost to increase or consume the projector of the situation that electric power increases.
In projector of the present invention, preferred aforementioned illumination apparatus, be to have to possess luminotron and elliptical mirror and penetrate the light supply apparatus of convergent illuminating bundle, and the illuminating bundle that will come from the aforementioned lights source apparatus is transformed into the lighting device of the integrator rod of the illuminating bundle with more uniform intensity distributions to illuminated area side; The light emergence face of aforementioned integrator rod has along the compressed flat shape of aforementioned the opposing party's direction.
By such formation, owing to use the lighting device that constitutes by above-mentioned bar-shaped integrator optical system, therefore can penetrate and have the uniform illuminating bundle of Illumination Distribution in compressed cross sectional shape of the opposing party's direction and the face, can improve the light utilization ratio.Its result can constitute and has good animation display characteristic and uniform display characteristic in the face, and does not have manufacturing cost to increase or consume the projector of the situation that electric power increases.
In projector of the present invention, preferred aforementioned rotating prism is configured in and the aforementioned image forming area of aforementioned electric optic modulating device optically roughly on the position of conjugation.
By such formation, just can constitute and have good animation display characteristic and uniform display characteristic in the face, and not have manufacturing cost to increase or consume the projector of the situation that electric power increases.
In projector of the present invention, preferred aforementioned polarization direction control assembly is configured in and the aforementioned image forming area of aforementioned electric optic modulating device optically roughly on the position of conjugation.
In projector of the present invention, so long as in the light path that illuminating bundle passes through, can be at the polarization direction of position configuration arbitrarily control assembly.But, because with the image forming area of electro-optic modulation arrangement optically roughly on the position of conjugation, the sectional area of illuminating bundle is less, therefore as mentioned above, by configuration polarization direction control assembly on this position, the size of polarization direction control assembly can be dwindled, and manufacturing cost can be reduced.
In projector of the present invention, preferred aforementioned polarization direction control assembly and then have as the function that is used for the light-blocking member of the cross sectional shape shaping of illuminating bundle.
By such formation, utilize the function as light-blocking member of polarization direction control assembly, the cross sectional shape of the illuminating bundle that penetrates from the polarization direction control assembly correctly can be shaped as the cross sectional shape of the illuminating bundle on the image forming area that is radiated at electro-optic modulation arrangement.
In projector of the present invention, be preferably as the aforementioned electric optic modulating device, possess according to a plurality of electro-optic modulation arrangement of modulating multiple coloured light with the corresponding image information of various coloured light, and and then possess that the illuminating bundle that is configured between aforementioned rotating prism and the aforementioned a plurality of electro-optic modulation arrangement, is used for coming from aforementioned rotating prism is separated into multiple coloured light and the look of the aforementioned a plurality of electro-optic modulation arrangement that lead separates leaded light optical system and will be by the synthetic cross colour splitting prism of various coloured light of aforementioned a plurality of electro-optic modulation arrangement modulation.
By such formation, can with have good animation display characteristic and uniformly display characteristic in the face, do not have manufacturing cost to increase or consume the projector of the situation that electric power increases simultaneously, make good (for example 3 is board-like) the full color projector of image quality.
Description of drawings
Fig. 1 is the figure that shows for the projector 1000 in the example 1 is described.
Fig. 2 is the figure that shows the relation of the illumination condition on the rotation of rotating prism 770 and liquid- crystal apparatus 400R, 400G, the 400B.
Fig. 3 is the figure of relation that shows the inclination angle [theta] of the illumination condition of the illuminating bundle L on the image forming area S of liquid- crystal apparatus 400R, 400G, 400B and rotating prism 770.
Fig. 4 is the figure that shows for the projector that comparative example is described.
Fig. 5 is the figure that shows for light transmission rate control assembly 700 is described.
Fig. 6 is the figure that shows for light transmission rate control assembly 700 is described.
Fig. 7 is the figure that shows for the effect that light transmission rate control assembly 700 and light transmission rate control circuit 740 are described.
Fig. 8 is for the light transmission rate control assembly 700 of the projector 1000 that example 1 is described and light transmission rate control circuit 740 and the block diagram of showing.
Fig. 9 is the figure that shows for the projector 1002 that example 2 is described.
Figure 10 is the figure that shows for the projector 1004 that example 3 is described.
Figure 11 is the figure that shows for the optical system of the projector 1006 that example 4 is described.
Figure 12 is the figure that shows for the optical system of the projector 1008 that example 5 is described.
Figure 13 is the figure that shows for the optical system of the projector 1010 that example 6 is described.
Figure 14 is the figure that shows the relation of the illumination condition on the rotation of rotating prism 770 and liquid- crystal apparatus 400R, 400G, the 400B.
Figure 15 is the figure that shows for the projector 1012 that example 7 is described.
Figure 16 is the figure that shows for the projector 1012 that example 7 is described.
Figure 17 is the figure that shows for projector 900 in the past is described.
Figure 18 is the figure of the rotational speed of the rotating prism 960 in the projector 900 that shows in the past.
Label declaration
100,100B lighting device 100ax, 100Bax lighting optical axis
110,110B, 910 light supply apparatuses, 112,912 luminotrons
114,914 elliptical mirrors, 116 auxiliary mirrors
118 parallelization lens, 120,920 the 1st lens arras
122 the 1st lenslets, 130,930 the 2nd lens arras
140 polarization conversion devices, 150,950 overlapping lens
160 integrator rod, 162 polarisation transformation portions
164 rod portions
166,176R, 176G, 198,244,246,248,790,792,952 field lenses
190 relay optical systems
191,192,194,195,197,240,242,794 relay lenss
193,196,212,216,218,220,222,264 catoptrons
200,202 looks separate the leaded light optical system
210,214,260,262 dichronic mirrors
400R, 400G, 400B, 970 liquid-crystal apparatus
420R, 420G, 420B penetrate the lateral deviation vibration plate
500 cross colour splitting prisms
600,980 projection optical systems
700,702R, 702G, 702B light transmission rate control assembly
700a, 702a light transmissive portion 710 polarization direction control assemblies
712,714 glass substrates, 716,718 transparency electrodes
720 shadow shields, 722 liners
724 liquid crystal, 730 polarization plates
740,742 light transmission rate control circuits, 750 rotation status detecting sensors
752 rotation status testing circuits, 760,762 image processing circuits
770,960 rotating prisms, 772 turning axles
774 motors, 776 motor drive circuits
780 light-blocking members, 782 peristomes
900,1000,1004,1006,1008,1010,1012 projectors
The zone of L illumination beam
The picture of the imaginary centres point of the 1st lenslet on the P lighting optical axis or the light emergence face of integrator rod
S image forming area SCR screen
Embodiment
Below, the example shown in illustrates projector of the present invention with reference to the accompanying drawings.
(example 1)
At first, with Fig. 1 projector 1000 in the example 1 is described.
Fig. 1 is the figure that shows for the projector 1000 that example 1 is described.Fig. 1 (a) is the figure that sees the optical system of projector 1000 from above, Fig. 1 (b) is the figure that sees the optical system of projector 1000 from the side, Fig. 1 (c) is the front elevation of the 1st lens arra 120, Fig. 1 (d) is the figure that shows the illumination condition on the light transmission rate control assembly 700, and Fig. 1 (e) is the figure that shows the illumination condition on the liquid-crystal apparatus 400R.
Moreover, in the following description, 3 mutually orthogonal directions are made as z direction of principal axis (the lighting optical axis 100ax direction among Fig. 1 (a)) respectively, the x direction of principal axis (among Fig. 1 (a) be parallel to paper and with the direction of z axle quadrature) and the y direction of principal axis (among Fig. 1 (a) perpendicular to paper and with the direction of z axle quadrature).
Projector 1000 in the example 1 shown in Fig. 1 (a) and Fig. 1 (b), is the projector that possesses following each several part, promptly possesses: lighting device 100; The illuminating bundle that will come from lighting device 100 is separated into these 3 kinds of coloured light of red light, green light and blue light and leaded light to the look in illuminated zone and separates leaded light optical system 200; As separating 3 kinds of coloured light that leaded light optical system 200 separates respectively according to 3 liquid- crystal apparatus 400R, 400G, the 400B of the electro-optic modulation arrangement of image information modulation by look; Will be by the synthetic cross colour splitting prism 500 of coloured light of these 3 liquid- crystal apparatus 400R, 400G, 400B modulation; With will be by the projection optical system 600 of the synthetic optical projection of cross colour splitting prism 500 on the projecting plane of screen SC R etc.
Lighting device 100 has: the light supply apparatus 110 that penetrates the illuminating bundle of almost parallel to illuminated area side; Be used for to be divided into the 1st lens arra 120 of a plurality of the 1st lenslets 122 of having of a plurality of segment beams from the illuminating bundle that light supply apparatus 110 penetrates; Have and a plurality of the 1st lenslet 122 corresponding a plurality of the 2nd lenslets 132 of the 1st lens arra 120 the 2nd lens arra 130 of (figure does not show); To there be unified illuminating bundle to be adjusted into the polarization conversion device 140 of a kind of roughly the same linearly polarized light from the polarization direction that light supply apparatus 110 penetrates; With the overlapping lens 150 that are used to make the each several part light beam that penetrates from polarization conversion device 140 at illuminated region overlapping.
Light supply apparatus 110 has: elliptical mirror 114; Near the luminotron 112 that the 1st focus of elliptical mirror 114, has luminescent center; With will be transformed to the parallelization lens 118 of the light of almost parallel by the converging light of elliptical mirror 114 reflection.On luminotron 112, be provided with as the auxiliary mirror 116 of the light that will penetrate to illuminated area side from luminotron 112 to the reflection unit of luminotron 112 reflections.
Luminotron 112, a pair of sealing that has the pipe bulb and extend to the both sides in pipe bulb.
Elliptical mirror 114 has neck shape portion that inserts the tubular on the sealing that leads to a side who is fixed on luminotron 112 and the reflective concave surface that will reflect to the 2nd focal position from the light of luminotron 112 radiation.
Auxiliary mirror 116, be cover luminotron 112 the pipe bulb roughly half, and with the reflection part that the reflective concave surface of elliptical mirror 114 relatively disposes, insert on logical the opposing party's who is fixed on luminotron 112 the sealing.
By adopting such auxiliary mirror 116, from the light of luminotron 112 to a side (illuminated area side) radiation opposite with elliptical mirror 114, by auxiliary mirror 116 to luminotron 112 reflections.Light by auxiliary mirror 116 reflections, just radiate to elliptical mirror 114 from luminotron 112, and then by the reflection of the reflective concave surface of elliptical mirror 114 and assemble to the 2nd focal position, with the light that directly radiates to elliptical mirror 114 from luminotron 112 similarly, can make it be focused at the 2nd focal position of elliptical mirror 114.
Parallelization lens 118 are made of concavees lens, are configured in the illuminated area side of elliptical mirror 114.And be constituted as and make come from elliptical mirror 114 wide cause parallelization.
The 1st lens arra 120, have the light beam that is divided into a plurality of segment beams as the light that will come from parallelization lens 118 and cut apart the function of optical element, and have to possess and becoming the structure of rectangular a plurality of the 1st lenslets 122 with assortment in the face of lighting optical axis 100ax quadrature.The 1st lenslet 122 shown in Fig. 1 (c), is configured to vertical 16 row of horizontal 4 row, has the flat shape of " along the axial linear foot of y cun: along the rectangle of the axial crossfoot of x cun=1: 4 ".
Promptly, the 1st lenslet 122 in the 1st lens arra 120, has the longitudinally compressed flat shape that constitutes by " along the axial linear foot of y cun: along the rectangle of the axial crossfoot of x cun=1: 4 ", make the illuminating bundle that penetrates from lighting device 100 become to have the illuminating bundle of following such cross sectional shape, it is the cross sectional shape of described illuminating bundle, at liquid- crystal apparatus 400R, 400G, in the direction in length and breadth of the image forming area S of 400B, for the integral body that forms region S along the axial laterally speech of x illumination image, for about 50% (with reference to Fig. 1 (e)) along axial this image forming area S that throws light on for vertically of y.
The 2nd lens arra 130, it is the optical element that makes a plurality of segment beams convergences of cutting apart by above-mentioned the 1st lens arra 120, with the 1st lens arra 120 similarly, have to possess and becoming the structure of rectangular a plurality of the 2nd lenslets 132 with assortment in the face of lighting optical axis 100ax quadrature.The 2nd lenslet 132 has and the flat shape of the 1st lenslet 122 (y direction of principal axis) compressed flat shape similarly longitudinally.
Polarization conversion device 140 is polarization directions of the each several part light beam that will be cut apart by the 1st lens arra 120, as the corresponding to roughly a kind of polarization conversion device that linearly polarized light penetrates in polarization direction.
Polarization conversion device 140 has: the linear polarization composition that will come from the side in the polarized component that is comprised in the illuminating bundle of light supply apparatus 110 directly sees through, with the opposing party's linear polarization composition to polarization separation layer perpendicular to the direction reflection of lighting optical axis 100ax; Will be by the opposing party's of polarization separation layer reflection linear polarization composition reflection horizon to the direction reflection parallel with lighting optical axis 100ax; With with unified for the side that sees through the polarization separation layer the linear polarization composition and carry out the polarizer of polarisation transformation by the mode of the linear polarization composition of any one party among the opposing party's of reflective layer reflects the linear polarization composition.
Overlapping lens 150 are that a plurality of segment beams that passed through the 1st lens arra the 120, the 2nd lens arra 130 and polarization conversion device 140 are assembled the optical element that makes (with reference to Fig. 1 (d)) on its light transmission rate control area that overlaps light transmission rate control assembly 700.Picture on the light transmission rate control area of light transmission rate control assembly 700 is imaged on once more by optical element described later on the image forming area S (with reference to Fig. 1 (e)) of liquid- crystal apparatus 400R, 400G, 400B.
Lighting device 100 by constituting in the above described manner can be transformed into the illuminating bundle that comes from light supply apparatus 110 illuminating bundle with more uniform intensity distributions, and can be with uniform illumination with illuminated area illumination.In addition, can penetrate illuminating bundle L (with reference to Fig. 1 (d)) with following cross sectional shape, promptly form the integral body of region S for horizontal (x direction of principal axis) illumination image of the image forming area S of liquid- crystal apparatus 400R, 400G, 400B, for vertical (y direction of principal axis) illumination image form the part of region S such, (y direction of principal axis) compressed cross sectional shape longitudinally.
Lighting device 100 and look separate between the leaded light optical system 200, with the image forming area S of each the 1st lenslet 122 and liquid- crystal apparatus 400R, 400G, 400B optically roughly on the position of conjugation, the light transmission rate control assembly 700 of configuration light transmission rate control device.Light transmission rate control assembly 700 shown in Fig. 1 (d), has light transmissive portion 700a, and this light transmissive portion 700a has the flat shape of " along the axial linear foot of y cun: along the rectangle of the axial crossfoot of x cun=1: 4 ".Thus, light transmission rate control assembly 700 has the function of carrying out the light-blocking member of shaping as the cross sectional shape that is used for illumination beam.
Moreover, narrate in the back for the details of light transmission rate control assembly 700.
Light beam from lighting device 100 penetrates incides on the rotating prism 770.Rotating prism 770, be configured between lighting device 100 and liquid- crystal apparatus 400R, 400G, the 400B, have and the picture write frequency of liquid- crystal apparatus 400R, 400G, the 400B function of (y direction of principal axis) scanning illuminating bundle L along the longitudinal on image forming area S synchronously.Be configured in the field lens 790,792 of the front and back of rotating prism 770, in order to make light with respect to relay lens 240,242 described later incident and being provided with effectively.
Moreover, narrate in the back for the details of rotating prism 770.
Look separates leaded light optical system 200, shown in Fig. 1 (a), has dichronic mirror 210,214, catoptron 212,216,218,220,222 and relay lens 240,242.Look separates leaded light optical system 200, has to be separated into these 3 kinds of coloured light of red light, green light and blue light from the illuminating bundle that rotating prism 770 penetrates, and various coloured light are led as liquid-crystal apparatus 400R, the 400G of lighting object, the function of 400B.Separate leaded light optical system 200 as look, adopt that optical path length from lighting device 100 to liquid- crystal apparatus 400R, 400G, 400B equates etc. the light path optical system.
Dichronic mirror 210 sees through red light component and green light components from the light that rotating prism 770 penetrates, simultaneously reflect blue light.By the blue light components of dichronic mirror 210 reflections,,,, arrive the liquid-crystal apparatus 400B that blue light is used by field lens 248 then by catoptron 220,222 reflections through relay lens 242 by catoptron 218 reflections.On the other hand, seen through the red light component and the green light components of dichronic mirror 210, by catoptron 212 reflections, and by relay lens 240.From the red light component of relay lens 240 ejaculations and the red light component the green light components, see through dichronic mirror 214, and then, arrive the liquid-crystal apparatus 400B that red light are used by field lens 244 by catoptron 216 reflections.In addition, by the green light components of dichronic mirror 214 reflections,, arrive the liquid-crystal apparatus 400G that green light is used by field lens 246 backs further by catoptron 218 reflections.Moreover, be located at the field lens 244,246,248 of light path leading portion of each coloured light of liquid- crystal apparatus 400R, 400G, 400B, be each several part light beam in order to penetrate from the 2nd lens arra 130, the light beam that is transformed into respect to each chief ray almost parallel is provided with.
Liquid- crystal apparatus 400R, 400G, 400B are the devices that illuminating bundle is formed coloured image according to the image information modulation, become the lighting object of lighting device 100.Moreover, though omitted diagram, but between field lens 244,246,248 and each liquid- crystal apparatus 400R, 400G, 400B, fill respectively and dispose the light incident side polarization plates, between each liquid- crystal apparatus 400R, 400G, 400B and cross colour splitting prism 500, fill respectively and dispose the emitting side polarization plates.By these light incident side polarization plates, liquid- crystal apparatus 400R, 400G, 400B and emitting side polarization plates, carry out the optical modulation of each coloured light of incident.
Liquid- crystal apparatus 400R, 400G, 400B, be that airtight inclosure has device as the liquid crystal of electro-optical substance in a pair of transparent glass substrate, for example, with multi-crystal TFT as on-off element, according to the picture signal that is applied, modulation is from the polarization direction of a kind of linearly polarized light of light incident side polarization plates ejaculation.
As liquid- crystal apparatus 400R, 400G, 400B, the liquid-crystal apparatus that uses and to have the widescreen of the flat shape of " along the axial linear foot of y cun: along the rectangle of the axial crossfoot of x cun=9: 16 " to use.
Cross colour splitting prism 500 is synthetic according to the optical image after the optical modulation of all kinds with what penetrate from the emitting side polarization plates, forms the optical element of coloured image.This cross colour splitting prism 500 is the plane that 4 right-angle prisms applyings are formed and sees roughly square shape, on the interface of the roughly X word shape that right-angle prism is fitted mutually, is formed with the dielectric multilayer film.Be formed on the dielectric multilayer film reflection red light on a side's of X word shape roughly the interface, be formed on the dielectric multilayer film reflect blue light on the opposing party's the interface.By these dielectric multilayer films, red light and blue light turnover, unified with the direct of travel of green light, thus 3 kinds of coloured light are synthesized.
Coloured image from cross colour splitting prism 500 penetrates by projection optical system 600 enlarging projections, forms big picture image on screen SC R.
Projector 1000 in the example 1 uses rotating prism 770 and possesses the light transmission rate control device.
Below, explain the rotating prism 770 and the light transmission rate control device of the projector 1000 in the example 1.
1. rotating prism
Fig. 2 is the figure that shows the relation of the illumination condition on the rotation of rotating prism 770 and liquid- crystal apparatus 400R, 400G, the 400B.Fig. 2 (a) is the sectional view when turning axle 772 is seen rotating prism 770, Fig. 2 (b) is the figure when lighting optical axis 100ax sees rotating prism 770, and Fig. 2 (c) is the figure that shows the irradiating state of the illuminating bundle L on the image forming area S of liquid- crystal apparatus 400R, 400G, 400B.
Rotating prism 770, the picture that is constituted as with liquid- crystal apparatus 400R, 400G, 400B writes scan-synchronized ground with certain speed rotation.Therefore, the light that the picture P of the imaginary centres point of the 1st lenslet 122 from the lighting optical axis 100ax penetrates is shown in Fig. 2 (a)～Fig. 2 (c), when rotating prism 770 rotations, because the refraction that the light of rotating prism 770 is stipulated by face.Its result on the image forming area S of liquid- crystal apparatus 400R, 400G, 400B, writes scan-synchronized ground with picture, and rayed zone and the non-irradiation area of light roll in turn.
Therefore, according to the projector in the example 1 1000,, just can on the image forming area S of liquid- crystal apparatus 400R, 400G, 400B, scan illuminating bundle L by making rotating prism 770 rotations.Consequently, if be conceived to point arbitrarily on the image forming area S of liquid- crystal apparatus 400R, 400G, 400B, then light is interdicted discontinuously, just therefore can improve the animation display characteristic, and have good animation display characteristic.
2. light transmission rate control device
Projector 1000 in the example 1 possesses to alleviate the light transmission rate control device that sweep velocity because of illuminating bundle changes the illumination difference that produces on the image forming area S of liquid- crystal apparatus 400R, 400G, 400B mode changes the light transmission rate of illuminating bundle.In addition, the light transmission rate control device has the light transmission rate control circuit 740 of the light transmission rate of light transmission rate control assembly 700 and control light transmission rate control assembly 700.Below, with Fig. 3～Fig. 8 light transmission rate control assembly 700 and light transmission rate control circuit 740 are described.
Fig. 3～Fig. 7 is the figure that shows for the effect that light transmission rate control assembly 700 and light transmission rate control circuit 740 are described.
Fig. 3 (a)～Fig. 3 (d) is the figure that shows the inclination angle [theta] of the illumination condition of the illuminating bundle L on the image forming area S of liquid- crystal apparatus 400R, 400G, 400B and rotating prism 770, and Fig. 3 (e) is the figure of relation that shows the translational speed of the inclination angle [theta] of rotating prism 770 and the illuminating bundle L on the image forming area S.Moreover the arrow v shown in Fig. 3 (a) and Fig. 3 (c) is respectively with the translational speed of the imaginary centres point of vector representation illuminating bundle L.Fig. 3 (b), inclination angle [theta] when having showed the illumination condition shown in Fig. 3 (a) (illuminating bundle L illumination image forms the state of vertical central portion of region S), rotating prism 770, Fig. 3 (d), inclination angle [theta] when having showed the illumination condition shown in Fig. 3 (c) (illuminating bundle L illumination image forms the state of the longitudinal end of region S), rotating prism 770.
Moreover in Fig. 3 (e), the inclination angle [theta] of the rotating prism 770 when vertically inciding lighting optical axis 100ax on the rotating prism face is made as " inclination angle [theta]=0 ° " (following be made as identical) in this instructions.
Fig. 4 (a) is the figure that shows the relation of the inclination angle [theta] of rotating prism 770 of the projector in the comparative example that does not use the light transmission rate control device and the light intensity on the image forming area S, Fig. 4 (b) is the figure of light intensity distributions that shows the screen SC R of the projector in the comparative example, and Fig. 4 (c) is the figure that shows the relative value of the light intensity on the screen SC R of the projector in the comparative example.
Thereby rotating prism 770 rotations are made in the formation that scans on the image forming area S of illuminating bundle L at liquid- crystal apparatus 400R, 400G, 400B, on the image forming area S of liquid-crystal apparatus, the translational speed of illuminating bundle L (sweep velocity) changes according to its position.That is, as shown in Figure 3, the translational speed of the illuminating bundle at place, the vertical both ends of image forming area S, faster than the translational speed of the illuminating bundle of vertical central portion of image forming area S.Therefore, in the projector in the comparative example that does not use the light transmission rate control device (figure does not show), as understanding from Fig. 4 (a), in liquid- crystal apparatus 400R, 400G, 400B, the illumination at vertical (y direction of principal axis) both ends of image forming area S is lower than the illumination of vertical central portion.In addition, on screen SC R similarly, shown in Fig. 4 (b) and Fig. 4 (c), vertical both ends (label H of screen SC R 0, H 2) illumination located is than vertical (y direction of principal axis) central portion (label H 1) illumination located is low.
Relative therewith, in the projector 1000 in example 1,, possess light transmission rate control assembly 700 and light transmission rate control circuit 740 as the light transmission rate control device as Fig. 5 and shown in Figure 8.
Fig. 5 (a) is the front elevation of light transmission rate control assembly 700, Fig. 5 (b) is a sectional view of seeing light transmission rate control assembly 700 from the top, Fig. 5 (c) is from laterally seeing the sectional view of light transmission rate control assembly 700, and Fig. 5 (d) is the figure of relation that shows the light transmission rate of the inclination angle [theta] of rotating prism 770 and light transmission rate control assembly 700.
Light transmission rate control assembly 700, shown in Fig. 5 (b) and Fig. 5 (c), have according to control from light transmission rate control circuit 740, control is the polarization direction control assembly 710 of the polarization direction of a kind of linearly polarized light and the polarization plates 730 that the vertical polarized component of (y direction of principal axis) is seen through roughly.
Polarization direction control assembly 710 has set transparency electrode 716,718, shadow shield 720 and liner 722 between 2 transparent glass substrate 712,714, and then airtight inclosure has the formation of liquid crystal 724 in inside.
Polarization plates 730 is provided on the glass substrate 714 of light emergence face side of polarization direction control assembly 710, and possesses to make and have the function that the vertical illuminating bundle of the polarized component of (y direction of principal axis) sees through.
This light transmission rate control assembly 700, has following function, thereby promptly by making change in voltage on the liquid crystal 724 that is carried in polarization direction control assembly 710 make change of polarization by the illuminating bundle of polarization direction control assembly 710, adjustment is polarized the light quantity of the illuminating bundle that plate 730 absorbs, and the ratio (hereinafter referred to as " light transmission rate of light transmission rate control assembly 700 ") with respect to the light intensity of the illuminating bundle light intensity that incides the illuminating bundle on the light transmission rate control assembly 700, that penetrate from light transmission rate control assembly 700 is changed.Shown in Fig. 5 (d), light transmission rate control assembly 700 is controlled light transmission rate accordingly with the inclination angle [theta] of rotating prism 770.At this, the variation of the light transmission rate of the light transmission rate control assembly 700 when on liquid crystal 724 on-load voltage being described with Fig. 6 (a)～Fig. 6 (d).
Fig. 6 (a)～Fig. 6 (d) is the variation of light transmission rate of the illuminating bundle when on the liquid crystal 724 of polarization direction control assembly 710 on-load voltage is described and the figure that shows.Moreover, shown in Fig. 6 (a)～Fig. 6 (c) with the arrow that surrounds of circle, expression is parallel to the polarized component of paper.
If to have the situation that the vertical illuminating bundle of the polarized component of (y direction of principal axis) incides on the light transmission rate control assembly 700 is that example illustrates, then on-load voltage V on the liquid crystal 724 in polarization direction control assembly 710 0The time, shown in Fig. 6 (a), incide the vertically illuminating bundle of the polarized component of (y direction of principal axis) that has on the light transmission rate control assembly 700, when passing through polarization direction control assembly 710, its polarization direction is rotated 90 °, has the laterally illuminating bundle of the polarized component of (x direction of principal axis) thereby become.Owing on the light emergence face of polarization direction control assembly 710, dispose polarization plates 730, therefore the illuminating bundle that has the polarized component of this horizontal (x direction of principal axis) just is polarized plate 730 and absorbs, and becomes the situation that does not penetrate illuminating bundle from light transmission rate control assembly 700.That is on-load voltage V on liquid crystal 724, at polarization direction control assembly 710 0The time, shown in Fig. 6 (d), just light transmission rate control assembly 700 has light transmission rate T 0
On the other hand, on-load voltage V on liquid crystal 724 at polarization direction control assembly 710 2The time, shown in Fig. 6 (c), incide the vertically illuminating bundle of the polarized component of (y direction of principal axis) that has on the light transmission rate control assembly 700, the polarization direction does not change in polarization direction control assembly 710, directly by polarization plates 730.That is on-load voltage V on liquid crystal 724, at polarization direction control assembly 710 2The time, shown in Fig. 6 (d), light transmission rate control assembly 700 has light transmission rate T 2
In addition, on-load voltage V on liquid crystal 724 at polarization direction control assembly 710 1The time, shown in Fig. 6 (b), incide the vertically illuminating bundle of the polarized component of (y direction of principal axis) that has on the light transmission rate control assembly 700, when passing through polarization direction control assembly 710, its polarization direction is rotated about 45 °, thereby becomes the illuminating bundle with oblique polarized component.The laterally illuminating bundle of the polarized component of (x direction of principal axis) that has that this has in the illuminating bundle of oblique polarized component is polarized plate 730 and absorbs, therefore with on-load voltage V on liquid crystal 724 2The time illuminating bundle that penetrates from light transmission rate control assembly 700 light quantity compare, penetrate the illuminating bundle of about 50% light quantity from light transmission rate control assembly 700.That is on-load voltage V on liquid crystal 724, at polarization direction control assembly 710 1The time, shown in Fig. 6 (d), light transmission rate control assembly 700 has light transmission rate T 1
Like this, light transmission rate control assembly 700 is constituted as the change in voltage that loads by the liquid crystal 724 that makes polarization direction control assembly 710, thereby the light transmission rate of light transmission rate control assembly 700 is changed.
Fig. 7 (a) is the figure that shows the relation of the inclination angle of rotating prism 770 of the projector 1000 in the example 1 and the light intensity on the image forming area S, Fig. 7 (b) is the figure of light intensity distributions that shows the screen SC R of the projector 1000 in the example 1, and Fig. 7 (c) is the figure that shows the relative value of the light intensity on the screen SC R of the projector 1000 in the example 1.Moreover in Fig. 7 (a) and Fig. 7 (c), the light intensity of each inclination angle [theta] is that the light intensity during with inclination angle [theta]=0 ° is 100, uses with respect to the relative value of this light intensity and represent.
Light transmission rate control circuit 740, as from Fig. 4 (a) and Fig. 5 (d) as can be known, has following function, promptly work as illuminating bundle L by liquid- crystal apparatus 400R, 400G, during vertical (y direction of principal axis) central portion of the image forming area S of 400B, be carried in the control of the voltage on the polarization direction control assembly 710 in the mode of the light transmission rate that reduces light transmission rate control assembly 700, when illuminating bundle L passes through liquid- crystal apparatus 400R, 400G, during vertical (y direction of principal axis) both ends of the image forming area S of 400B, be carried in the control of the voltage on the polarization direction control assembly 710 in the mode of the light transmission rate of rising light transmission rate control assembly 700.Promptly, light transmission rate control circuit 740, has the mode that on the image forming area S of liquid- crystal apparatus 400R, 400G, 400B, changes the illumination difference that produces because of the translational speed (sweep velocity) of illuminating bundle L to alleviate, adjustment is carried in the voltage on the polarization direction control assembly 710, the function of the light transmission rate of control light transmission rate control assembly 700.
Therefore, according to the projector in the example 1 1000, shown in Fig. 7 (a), just it is poor to alleviate the above-mentioned illumination that produces when making rotating prism 770 rotations with certain rotational speed, shown in Fig. 7 (b) and Fig. 7 (c), can on whole of screen SC R, carry out more uniform demonstration.That is, has display characteristic in the uniform face.
Fig. 8 is the block diagram of showing for light transmission rate control assembly 700 that the projector 1000 in the example 1 is described and light transmission rate control circuit 740.
In the projector 1000 in example 1, as shown in Figure 8, and then the output signal that possesses the rotation status detecting sensor 750 of the rotation status that detects rotating prism 770 and handle rotation status detecting sensor 750 is then to the rotation status testing circuit 752 of light transmission rate control circuit 740 outputs.And light transmission rate control circuit 740 is constituted as the output signal according to rotation status testing circuit 752, the light transmission rate of control light transmission rate control assembly 700.
Therefore, according to the projector in the example 1 1000, therefore can carry out and the corresponding correct control of the rotation status of rotating prism 770, can alleviating translational speed (sweep velocity) because of illuminating bundle effectively, to change the illumination that produces on the image forming area S of liquid- crystal apparatus 400R, 400G, 400B poor.
Moreover, in the projector 1000 in example 1, be constituted as by the output signal of basis from the image processing circuit 760 of the processing of carrying out image information, by motor drive circuit 776 CD-ROM drive motor 774, thereby synchronously rotate rotating prism 770 with the picture write frequency of liquid- crystal apparatus 400R, 400G, 400B.
In the projector 1000 in example 1, as above-mentioned, be the polarization conversion device 140 of a kind of linearly polarized light roughly owing to possess with illuminating bundle is unified, and light transmission rate control assembly 700 has polarization direction control assembly 710 and polarization plates 730, therefore pass through the control of light transmission rate control circuit 740, thereby can make change in voltage on the liquid crystal 724 that is carried in polarization direction control assembly 710 make change of polarization, adjust the light quantity that is polarized the illuminating bundle that plate 730 absorbs by the illuminating bundle of polarization direction control assembly 710.Therefore, can correctly control the light transmission rate of illuminating bundle with low consumption electric power.
In the projector 1000 in example 1, polarization direction control assembly 710 (light transmission rate control assembly 700) is configured in and the image forming area S of each the 1st lenslet 122 and liquid- crystal apparatus 400R, 400G, 400B optically roughly on the position of conjugation.
In projector of the present invention, so long as in the light path that illuminating bundle passes through, can be at the polarization direction of position configuration arbitrarily control assembly.But, since with the image forming area S of each the 1st lenslet 122 and liquid- crystal apparatus 400R, 400G, 400B optically roughly on the position of conjugation, the sectional area of illuminating bundle is less, therefore as above-mentioned, by configuration polarization direction control assembly 710 on this position, the size of polarization direction control assembly 710 can be dwindled, manufacturing cost can be reduced.
In the projector 1000 in example 1, as mentioned above, because light transmission rate control device, have the light transmission rate control circuit 740 of the light transmission rate of light transmission rate control assembly 700 and control light transmission rate control assembly 700, the light transmission rate that therefore can correctly control illuminating bundle at an easy rate is poor to alleviate above-mentioned illumination.
In the projector 1000 in example 1, because polarization direction control assembly 710 (light transmission rate control assembly 700), has the function of carrying out the light-blocking member of shaping as the cross sectional shape that is used for illumination beam, therefore the cross sectional shape of the illuminating bundle that penetrates from polarization direction control assembly 710 correctly can be shaped as the cross sectional shape of the illuminating bundle L on the image forming area S that is radiated at liquid- crystal apparatus 400R, 400G, 400B.
Like this, according to the projector in the example 1 1000, because the rotational speed of rotating prism is changed, therefore as the motor that is used for the driven in rotation prism, just need not use expensive motor, the rotational speed of the motor that is used for the driven in rotation prism of also need not quickening continually and slow down simultaneously.Therefore, just there has not been manufacturing cost to increase or consume the situation of electric power increase.
Therefore, according to the projector in the example 1 1000, be to have display characteristic in good animation display characteristic and the uniform face, and the projector that can not increase manufacturing cost or consume electric power.
More than, though understand the rotating prism 770 and the light transmission rate control device of the projector 1000 in the example 1 in detail, also have following feature in the projector 1000 in example 1.
In the projector 1000 in example 1, light supply apparatus 110 is to have luminotron 112, reflect the elliptical mirror 114 of the light that comes from luminotron 112 and will be become the light supply apparatus of the parallelization lens 118 of almost parallel light by the light of elliptical mirror 114 reflections.
Therefore,, compare, can realize the light supply apparatus of more miniaturization with the light supply apparatus that has used parabolic mirror according to the projector in the example 1 1000.
In the projector 1000 in example 1, on luminotron 112, be provided with the light that will penetrate to illuminated area side from luminotron 112 auxiliary mirror 116 to luminotron 112 reflections.
Therefore, according to the projector in the example 1 1000, owing to reflected to luminotron 112 from the light of luminotron 112 to illuminated area side radiation, therefore do not need the size of elliptical mirror 114 is set at the such size in illuminated area side end that covers luminotron 112, the miniaturization of elliptical mirror 114 can be sought, and the miniaturization of projector 1000 can be sought.In addition, this situation also means the size that can further dwindle the 1st lens arra 120, the size of the 2nd lens arra 130, the size of polarization conversion device 140, the size of overlapping lens 150, the size of color separation optical system 200 etc., and can seek the further miniaturization of projector 1000.
In the projector 1000 in example 1,, possess separating 3 kinds of coloured light that leaded light optical system 200 penetrates from look according to 3 liquid-crystal apparatus 400R, the 400G, the 400B that modulate with the corresponding image information of various coloured light as electro-optic modulation arrangement.In addition, and then possess look that the illuminating bundle that is configured between rotating prism 770 and liquid- crystal apparatus 400R, 400G, the 400B, is used for coming from rotating prism 770 is separated into 3 kinds of coloured light and lead liquid- crystal apparatus 400R, 400G, 400B and separate leaded light optical system 200 and will be by the synthetic cross colour splitting prism 500 of various coloured light of liquid- crystal apparatus 400R, 400G, 400B modulation.
Therefore, according to the projector in the example 1 1000, even if can with under the situation that can access level and smooth and the animation display that quality is good, the light utilization ratio projector that also can not reduce significantly, make 3 good board-like full color projectors of image quality.
In the projector 1000 in example 1, and then have that the illuminating bundle that will come from light supply apparatus 110 is unified into a kind of linearly polarized light and the polarization conversion device 140 that penetrates.
Therefore, effect by polarization conversion device 140, the illuminating bundle that comes from light supply apparatus 110 can be transformed into a kind of linearly polarized light of polarization axle with a side, so projector 1000 in implementing form 1, under the situation of the electro-optic modulation arrangement of using the type of as liquid-crystal apparatus etc., utilizing a kind of linearly polarized light as electro-optic modulation arrangement, can effectively utilize the illuminating bundle that comes from light supply apparatus 110.
In the projector 1000 in example 1, on the light transmission face of rotating prism 770, be formed with and cut reflectance coating.Therefore, the light transmission rate of rotating prism 770 improves, and therefore the reduction of light utilization ratio can be reduced to irreducible minimum, and the parasitic light degree reduces simultaneously, and contrast rises.
(example 2)
Fig. 9 is the figure that shows for the projector 1002 in the example 2 is described.Moreover, in Fig. 9, be marked with identical label, and omit detailed explanation for the parts identical with Fig. 8.
Projector 1002 in the example 2 (figure does not show), though have basically to example 1 in the very similar formation of projector 1000, but as shown in Figure 9, compare the control device difference of light transmission rate control circuit with projector 1000 in the example 1.
Promptly, in the projector 1000 in example 1, as above-mentioned control device, use the rotation status detecting sensor 750 (with reference to Fig. 8) of the rotation status that detects rotating prism 770, light transmission rate control circuit 740, be constituted as output signal, the light transmission rate of control light transmission rate control assembly 700 according to rotation status detecting sensor 750.
Relative therewith, in the projector 1002 in example 2, as above-mentioned control device, replace the rotation status detecting sensor, as shown in Figure 9, use the image processing circuit 762 of the processing of carrying out image information, light transmission rate control circuit 742, be constituted as according to the synchronizing signal that comes from image processing circuit 762 light transmission rate of control light transmission rate control assembly 700.
In the projector 1002 in example 2, the rotation of the control of the light transmission rate of light transmission rate control assembly 700 and rotating prism 770 is carried out according to the synchronizing signal that comes from image processing circuit 762 simultaneously.Therefore, according to above-mentioned formation, also can carry out the control with the light transmission rate of the corresponding correct light transmission rate control assembly 700 of the rotation status of rotating prism 770, therefore can alleviating sweep velocity because of illuminating bundle effectively, to change the illumination that produces on the image forming area of liquid- crystal apparatus 400R, 400G, 400B poor.
Like this, projector 1002 in the example 2, compare with the projector 1000 in the example 1, though be used to alleviate translational speed (sweep velocity) because of illuminating bundle changes the light transmission rate control circuit of the illumination difference that produces on the image forming area of liquid-crystal apparatus control device difference, but with the situation of projector 1000 in the example 1 similarly, as the light transmission rate control device, possesses light transmission rate control assembly 700, light transmission rate control circuit 742 with the light transmission rate of controlling light transmission rate control assembly 700, therefore it is poor just can to alleviate the illumination that produces when making rotating prism 770 rotations with certain speed, can carry out more uniform demonstration on whole of screen.That is, has display characteristic in the uniform face.
Thereby, projector 1002 in the example 2, aspect except the control device of light transmission rate control circuit has the formation identical with the projector 1000 in the example 1, therefore have with example 1 in the identical effect of situation of projector 1000.
(example 3)
Figure 10 is the figure that shows in order to show the projector 1004 in the example 3.Figure 10 (a) is the figure that sees the optical system of projector 1004 from above, and Figure 10 (b) is the figure that sees the optical system of projector 1004 from the side.Figure 10 (c) is the front elevation of light-blocking member 780, and Figure 10 (d) is the front elevation of light transmission rate control assembly 702R.
Projector 1004 in the example 3, though have basically to example 1 in the very similar formation of projector 1000, but shown in Figure 10 (a), compare the allocation position of light transmission rate control assembly, quantity and structure difference with projector 1000 in the example 1.
That is, in the projector 1004 in example 3, shown in Figure 10 (a) and Figure 10 (b), 3 light transmission rate control assembly 702R, 702G, 702B are configured in the light entrance face side of liquid- crystal apparatus 400R, 400G, 400B respectively.Because these light transmission rate control assemblies 702R, 702G, 702B are configured in extremely near near liquid- crystal apparatus 400R, 400G, the 400B, therefore the light transmissive portion 702a of each light transmission rate control assembly 702R, 702G, 702B, different with the light transmissive portion 700a (with reference to Fig. 5 (a)) of the light transmission rate control assembly 700 of explanation in example 1, shown in Figure 10 (d), has similar shapes very with image forming area S.But light transmission rate control assembly 702R, 702G, 702B except above-mentioned aspect, have the formation roughly the same with the light transmission rate control assembly 700 of explanation in example 1, therefore omit detailed explanation.
In addition, with the image forming area S optics of each the 1st lenslet and liquid- crystal apparatus 400R, 400G, 400B on roughly on the position of conjugation, dispose the light-blocking member 780 that the cross sectional shape that is used for illumination beam carries out shaping.Light-blocking member 780 shown in Figure 10 (c), possesses and has the peristome 782 of the flat shape of " along the axial linear foot of y cun: along the rectangle of the axial crossfoot of x cun=1: 4 ".
Like this, projector 1004 in the example 3, compare with the projector 1000 in the example 1, though the allocation position of light transmission rate control assembly, quantity and structure (having light-blocking member 780 this point therewith together) difference, but with the situation of projector 1000 in the example 1 similarly, as the light transmission rate control device, possesses light transmission rate control assembly 702R, 702G, 702B, with output signal according to rotation status detecting sensor (scheming not show), control light transmission rate control assembly 702R, 702G, the light transmission rate control circuit of the light transmission rate of 702B (figure does not show), therefore it is poor just can to alleviate the illumination that produces when making rotating prism 770 rotations with certain speed, and can carry out more uniform demonstration on whole of screen SC R.That is, has display characteristic in the uniform face.
Moreover, in the projector 1004 in example 3, as mentioned above, though be made as the formation of light transmission rate control circuit of the light transmission rate of the output signal that possesses according to the rotation status detecting sensor, control light transmission rate control assembly 702R, 702G, 702B, but also can with the situation of projector 1002 in the example 2 similarly, be made as the formation that possesses according to the light transmission rate control circuit of the light transmission rate of the synchronizing signal that comes from image processing circuit, control light transmission rate control assembly 702R, 702G, 702B.
Thereby, projector 1004 in the example 3, except allocation position, quantity and the structure (having light-blocking member 780 this point therewith together) of light transmission rate control assembly, have the formation identical with the projector 1000,1002 in example 1 or 2, therefore have with example 1 or 2 in the identical effect of situation of projector 1000,1002.
(example 4)
Figure 11 is the figure that shows for the optical system of showing the projector 1006 in the example 4.Figure 11 (a) is the figure that sees the optical system of projector 1006 from above, and Figure 11 (b) is the figure that sees the optical system of projector 1006 from the side.
Projector 1006 in the example 4, though have basically to example 1 in the very similar formation of projector 1000, shown in Figure 11 (a), compare with projector 1000 in the example 1, look separates the formation difference of leaded light optical system.
Promptly, in the projector 1006 in example 4, separate leaded light optical system 202 as look,, used two relay optical systems 190 for the rayed zone all is made as identical direction with the direction that the non-irradiation area of light rolls on each liquid- crystal apparatus 400R, 400G, 400B.
Look separates leaded light optical system 202, shown in Figure 11 (a), has dichronic mirror 260,262, catoptron 264 and two relay optical system 190.Two relay optical systems 190 have relay lens 191,192,194,195,197, catoptron 193,196 and field lens 198.In addition, separate the light path leading portion of leaded light optical system 202, dispose relay lens 794 at look.
Dichronic mirror 260, the red light component of reflection from the light that rotating prism 770 penetrates makes green light and blue light see through simultaneously.By the red light component of dichronic mirror 260 reflections,, arrive the liquid-crystal apparatus 400R that red light is used by field lens 176R by catoptron 264 reflections.
Seen through the green light components of dichronic mirror 260 and the green light components in the blue light components, reflected, and after by field lens 176G, arrived the liquid-crystal apparatus 400G that green light is used by dichronic mirror 262.On the other hand, seen through the blue light components of dichronic mirror 260, seen through dichronic mirror 262, and arrived the liquid-crystal apparatus 400B that blue light is used by two relay optical systems 190 backs.Being located at field lens 176R, the 176G, 198 of light path leading portion of each coloured light of liquid- crystal apparatus 400R, 400G, 400B, is the each several part light beam in order to penetrate from the 2nd lens arra 130, and the light beam that is transformed into respect to each chief ray almost parallel is provided with.
At this, why two relay optical systems 190 are set on the light path of blue light, be in order to prevent because the optical path length of blue light is longer than the optical path length of other coloured light, thereby cause the utilization ratio of light to reduce by dispersing of light etc., be provided with in order all to be made as identical direction simultaneously in the direction that the non-irradiation area of each liquid- crystal apparatus 400R, 400G, 400B glazing irradiation area and light rolls.Moreover, in the projector 1006 in example 4, though be made as the formation of using two relay optical systems 190 on the light path of the blue light in 3 kinds of coloured light, also can be made as the formation of on other the light path of coloured light such as red light, using so two relay optical systems.
Like this, projector 1006 in the example 4, compare with the projector 1000 in the example 1, though look separates the formation difference of leaded light optical system, but with the situation of projector 1000 in the example 1 similarly, as the light transmission rate control device, possesses light transmission rate control assembly 700, with output signal according to rotation status detecting sensor (scheming not show), the light transmission rate control circuit (figure does not show) of the light transmission rate of control light transmission rate control assembly 700, therefore it is poor just can to alleviate the illumination that produces when making rotating prism 770 rotations with certain rotational speed, and can carry out more uniform demonstration on whole of screen SC R.That is, has display characteristic in the uniform face.
Moreover, in the projector 1006 in example 4, as above-mentioned, though be made as the output signal that possesses according to the rotation status detecting sensor, the formation of the light transmission rate control circuit of the light transmission rate of control light transmission rate control assembly 700, but also can with the situation of projector 1002 in the example 2 similarly, be made as the synchronizing signal that possesses according to from image processing circuit, the formation of the light transmission rate control circuit of the light transmission rate of control light transmission rate control assembly 700.
Thereby, projector 1006 in the example 4, except look separates the formation of leaded light optical system, have the formation identical with the projector 1000,1002 in example 1 or 2, therefore have with example 1 or 2 in the identical effect of situation of projector 1000,1002.
(example 5)
Figure 12 is the figure that shows the optical system of the projector 1008 in the example 5.Figure 12 (a) is the figure that sees the optical system of projector 1008 from above, and Figure 12 (b) is the figure that sees the optical system of projector 1008 from the side.
Projector 1008 in the example 5, though have basically to example 1 in the very similar formation of projector 1000, shown in Figure 12 (a) and Figure 12 (b), compare the formation difference of lighting device with projector 1000 in the example 1.
That is, in the projector 1008 in example 5,, use the bar-shaped integrator optical system as lighting device 100B.
Lighting device 100B has: the light supply apparatus 110B that penetrates convergent illuminating bundle to illuminated area side; To be transformed into illuminating bundle from the illuminating bundle of light supply apparatus 110B with more uniform intensity distributions, with the integrator rod 160 of uniform illumination with illuminated area illumination; With relay lens 166.With the image forming area of the light emergence face of integrator rod 160 and liquid- crystal apparatus 400R, 400G, 400B optically roughly on the position of conjugation, dispose light transmission rate control assembly 700.
Integrator rod 160, having and will not having unified illuminating bundle unification from the polarization direction of light supply apparatus 110B ejaculation is the polarisation transformation portion 162 and the excellent portion 164 of a kind of linearly polarized light.Polarisation transformation portion 162 has: the linear polarization composition that makes the side in the polarized component included in the illuminating bundle from light supply apparatus 110B directly see through and the linear polarization composition that makes the opposing party to polarization separation layer perpendicular to the direction reflection of lighting optical axis 100Bax; Will be by the opposing party's of polarization separation layer reflection linear polarization composition reflection horizon to the direction reflection that is parallel to lighting optical axis 100Bax; With with the linear polarization composition that is unified into a side who has seen through the polarization separation layer with carry out the polarizer of polarisation transformation by the mode of the linear polarization composition of any one party in the opposing party's of reflective layer reflects the linear polarization composition.
The light emergence face of integrator rod 160 has the flat shape that is made of longitudinally compressed " along the axial linear foot of y cun: along the rectangle of the axial crossfoot of x cun=1: 4 ".
Like this, projector 1008 in the example 5, compare with the projector 1000 in the example 1, though the formation difference of lighting device, but with the situation of projector 1000 in the example 1 similarly, as the light transmission rate control device, possesses light transmission rate control assembly 700 and according to the output signal of rotation status detecting sensor (figure do not show), the light transmission rate control circuit (figure does not show) of the light transmission rate of control light transmission rate control assembly 700, therefore it is poor just can to alleviate the illumination that produces when making rotating prism 770 rotations with certain rotational speed, and can carry out more uniform demonstration on whole of screen SC R.That is, has display characteristic in the uniform face.
Moreover, in the projector 1008 in example 5, as above-mentioned, though be made as the output signal that possesses according to the rotation status detecting sensor, the formation of the light transmission rate control circuit of the light transmission rate of control light transmission rate control assembly 700, but also can with the situation of projector 1002 in the example 2 similarly, be made as the synchronizing signal that possesses according to coming from image processing circuit, the formation of the light transmission rate control circuit of the light transmission rate of control light transmission rate control assembly 700.
Thereby, projector 1008 in the example 5, on the point except the formation of lighting device, have the formation identical with the projector 1000,1002 in example 1 or 2, therefore have with example 1 or 2 in the identical effect of situation of projector 1000,1002.
(example 6)
Figure 13 is the optical system of showing the projector 1010 in the example 6.Figure 13 (a) is the figure that sees the optical system of projector 1010 from above, and Figure 13 (b) is the figure that sees the optical system of projector 1010 from the side.
Projector 1010 in the example 6, though have basically to example 5 in the very similar formation of projector 1008, but shown in Figure 13 (a) and Figure 13 (b), compare the allocation position of rotating prism (allocation position of light transmission rate control assembly thereupon) difference with the projector 1008 in the example 5.
That is, in the projector 1010 in example 6, rotating prism 770 is configured on image forming area S (with reference to Figure 14 (the c)) optics with the light emergence face of integrator rod 160 and liquid- crystal apparatus 400R, 400G, 400B roughly on the position of conjugation.In addition, accompany therewith, light transmission rate control assembly 700, be configured between field lens 790 and the rotating prism 770, and from the image forming area S optics of the light emergence face of integrator rod 160 and liquid- crystal apparatus 400R, 400G, 400B on roughly the position of conjugation leave a little on the position of a bit.
Figure 14 is the figure that shows the relation of the illumination condition on the rotation of rotating prism 770 and liquid- crystal apparatus 400R, 400G, the 400B.Figure 14 (a) is the sectional view when turning axle 772 is seen rotating prism 770, Figure 14 (b) is the figure when lighting optical axis 100Bax sees rotating prism 770, and Figure 14 (c) is the figure that shows the irradiating state of the illuminating bundle L on the image forming area S of liquid- crystal apparatus 400R, 400G, 400B.
Rotating prism 770, the picture that is constituted as with liquid- crystal apparatus 400R, 400G, 400B writes scan-synchronized ground with certain speed rotation.Therefore, the light that the picture P of the imaginary centres point of the light emergence face of the integrator rod 160 from the lighting optical axis 100Bax penetrates, shown in Figure 14 (a)～Figure 14 (c), when rotating prism 770 rotation, the refraction of being stipulated by face by the light of rotating prism 770.Its result, on the image forming area S of liquid- crystal apparatus 400R, 400G, 400B, rayed zone and the non-irradiation area of light just write scan-synchronized ground with picture and roll in turn.
Therefore, according to the projector in the example 6 1010, with the situation of projector 1008 in the example 5 similarly, by making rotating prism 770 rotations, just scanning illuminating bundle L on the image forming area S of liquid- crystal apparatus 400R, 400G, 400B.Its result if be conceived to point arbitrarily on the image forming area S of liquid- crystal apparatus 400R, 400G, 400B, just light is interdicted discontinuously, therefore just can improve the animation display characteristic, and have good animation display characteristic.
Like this, projector 1010 in the example 6, compare with the projector 1008 in the example 5, though the allocation position of rotating prism (allocation position of the light transmission rate control assembly that accompanies therewith) difference, but with the situation of projector 1008 in the example 5 similarly, as the light transmission rate control device, the light transmission rate control circuit (figure does not show) that possesses the light transmission rate of light transmission rate control assembly 700 and control light transmission rate control assembly 700, therefore it is poor just can to alleviate the illumination that produces when making rotating prism 770 rotations with certain rotational speed, and can carry out more uniform demonstration on whole of screen SC R.That is, has display characteristic in the uniform face.
Therefore, according to the projector in the example 6 1010, have with example 5 in the identical effect of situation of projector 1008, have good animation display characteristic and display characteristic in the face uniformly, and be not have manufacturing cost to increase or consume the projector of the situation that electric power increases.
(example 7)
Figure 15 and Figure 16 are the figure that shows for the projector 1012 in the example 7 is described.Figure 15 (a) is the figure that sees the optical system of projector 1012 from above, and Figure 15 (b) is the figure that sees the optical system of projector 1012 from the side.Figure 15 (c) is from laterally seeing the sectional view of polarization direction control assembly 710.Figure 16 (a)～Figure 16 (d) is the figure that shows for the variation of polarization direction that the illuminating bundle that penetrates from polarization direction control assembly 710 is described when 724 on-load voltages of the liquid crystal in polarization direction control assembly 710.Moreover in Figure 16 (a)～Figure 16 (c), the optical element on the light path that is configured in light incident side polarization plates 420R from polarization direction control assembly 710 to liquid- crystal apparatus 400R, 400G, 400B, 420G, 420B has omitted diagram.In addition, showed among Figure 16 (a)～Figure 16 (c) with the arrow that surrounds of circle, expression is parallel to the polarized component of paper.
Projector 1012 in the example 7, though have basically to example 1 in the very similar formation of projector 1000, but shown in Figure 15 (a)～Figure 15 (c), compare the formation difference of light transmission rate control device with projector 1000 in the example 1.
That is, in the projector 1000 of example 1, the light transmission rate control device has light transmission rate control assembly 700 and light transmission rate control circuit 740.And, light transmission rate control assembly 700, has the polarization plates 730 that the polarized component that on the glass substrate 714 of polarization direction control assembly of controlling according to the control that comes from light transmission rate control circuit 740, to the polarization direction of a kind of linearly polarized light roughly 710 and the light emergence face side that is provided in polarization direction control assembly 710, only makes vertical (y direction of principal axis) from the illuminating bundle that polarization direction control assembly 710 penetrates sees through.
Relative therewith, in the projector 1012 of example 7, the polarization plates that does not have the special use of light transmission rate control device, shown in Figure 15 (c) and Figure 16 (a)～Figure 16 (c), as the light transmission rate control device, use the polarization direction control circuit 744 (figure does not show) of the polarization direction of polarization direction control assembly 710 and control polarization direction control assembly 704.And, in the light transmission rate control device in example 7, it is characterized in that, replace the employed polarization plates 730 of situation of example 1, use light incident side polarization plates 420R, 420G, the 420B of the light entrance face side that is configured in liquid- crystal apparatus 400R, 400G, 400B.
Moreover, polarization direction control assembly 710, shown in Figure 15 (c), be with example 1 in the identical parts of parts of explanation, therefore omit detailed explanation.
Projector 1012 in the example 7, as mentioned above, compare with the situation of projector 1000 in the example 1, though following a bit, promptly different mutually on polarization plates 730 this point that do not set the special use of light transmission rate control device on the glass substrate 714 of the light emergence face side of polarization direction control assembly 710, but aspect in addition be with example 1 in the roughly the same formation of situation of projector 1000.
The light transmission rate control device of the projector 1012 in the example 7 is constituted as, by making change in voltage on the liquid crystal 724 that is carried in polarization direction control assembly 710 make change of polarization by the illuminating bundle of polarization direction control assembly 710, the light quantity of the illuminating bundle that adjustment is absorbed by light incident side polarization plates 420R, 420G, the 420B of the light entrance face side that is configured in liquid- crystal apparatus 400R, 400G, 400B is controlled the illumination of the illuminating bundle on liquid- crystal apparatus 400R, 400G, the 400B thus.The polarized component of a side from the illuminating bundle that polarization direction control assembly 710 penetrates sees through light incident side polarization plates 420R, 420G, 420B, and the opposing party's polarized component is absorbed by light incident side polarization plates 420R, 420G, 420B.
Moreover, variation for the polarization direction of the illuminating bundle that penetrates from polarization direction control assembly 710 when 724 on-load voltages of the liquid crystal in polarization direction control assembly 710, though shown in Figure 16 (a)～Figure 16 (d), but relation for the variation of the polarization direction that is carried in voltage on the polarization direction control assembly 710 and the illuminating bundle by polarization direction control assembly 710, identical with the situation of example 1, therefore omit its explanation.
Like this, light transmission rate control device in the projector 1012 of example 7 is constituted as, by making the change in voltage that the liquid crystal in the polarization direction control assembly 710 724 is loaded, do not make the illumination change of the illuminating bundle that penetrates from polarization direction control assembly 710 and control the polarization direction, the light quantity of the illuminating bundle that adjustment is absorbed by the light incident side polarization plates 420R of the light entrance face side that is configured in liquid- crystal apparatus 400R, 400G, 400B, 420G, 420B, thereby the illumination of the illuminating bundle on the control liquid- crystal apparatus 400R, 400G, 400B.
Polarization direction control circuit 744, with light transmission rate control circuit 740 in the projector 1000 of example 1 similarly, has following function, promptly to alleviate the mode that on the image forming area S of liquid- crystal apparatus 400R, 400G, 400B, changes the illumination difference that produces because of the translational speed (sweep velocity) of illuminating bundle L, adjustment is carried in the voltage on the polarization direction control assembly 710, controls the function of the polarization direction of the illuminating bundle that penetrates from polarization direction control assembly 710.
Like this, the projector 1012 of example 7, compare with the projector 1000 of example 1, though be used to alleviate translational speed (sweep velocity) because of illuminating bundle changes the light transmission rate control device of the illumination difference that produces on the image forming area of liquid-crystal apparatus formation difference, but because of the polarization direction control assembly 710 and the polarization direction control circuit 744 that possess as above-mentioned light transmission rate control device, therefore it is poor just can to alleviate the illumination that produces when making rotating prism 770 rotations with certain rotational speed, can carry out more uniform demonstration on whole of screen SC R.That is, has display characteristic in the uniform face.
In addition, projector 1012 according to example 7, as mentioned above, owing to do not use the polarization plates of light transmission rate control device special use, and the light incident side polarization plates 420R, 420G, the 420B that utilize liquid- crystal apparatus 400R, 400G, 400B constitute the light transmission rate control device, therefore the part number can be cut down, the manufacturing efficient of projector can be improved.
In the projector 1012 of example 7, polarization direction control assembly 710 is configured in and the image forming area of each the 1st lenslet 122 and liquid- crystal apparatus 400R, 400G, 400B optically roughly on the position of conjugation.
In projector of the present invention, so long as in the light path that illuminating bundle passes through, can be at the polarization direction of position configuration arbitrarily control assembly.But, with the image forming area optics of each the 1st lenslet 122 and liquid- crystal apparatus 400R, 400G, 400B on roughly on the position of conjugation, the sectional area of illuminating bundle is less, therefore as mentioned above, by polarization direction control assembly 710 is configured on this position, the size of polarization direction control assembly 710 can be dwindled, manufacturing cost can be reduced.
Moreover, polarization direction control assembly 710, but also preferred disposition in (position between field lens 244,246,248 and light incident side polarization plates 420R, 420G, the 420B) near liquid- crystal apparatus 400R, 400G, the 400B.
In addition, in the projector 1000 of example 1, because polarization direction control assembly 710, and then has a function of carrying out the light-blocking member of shaping as the cross sectional shape that is used for illumination beam, therefore the cross sectional shape of the illuminating bundle that penetrates from polarization direction control assembly 710 correctly can be shaped as the cross sectional shape of the illuminating bundle L on the image forming area S that is radiated at liquid- crystal apparatus 400R, 400G, 400B.
And the projector 1012 of example 7 has the formation identical with the projector 1000 of example 1 on aspect other, therefore has the identical effect of situation with the projector 1000 of example 1.
More than, according to above-mentioned each example projector of the present invention has been described, but has the invention is not restricted to above-mentioned each example, in the scope that does not break away from its aim, in various sample attitudes, can implement, for example also can carry out following distortion.
(1) projector 1000～1010 of above-mentioned example 1～6, as light transmission rate control assembly 700,702R, 702G, 702B, used the light transmission rate control assembly of making by liquid crystal, but the invention is not restricted to this, can also suitably use by electricity and cause the light transmission rate control assembly that colorful light-emitting material, electrophoresis material are made.
(2) above-mentioned example 1～4 and 7 projector 1000～1006,1012, flat shape as the 1st lenslet 122 of the 1st lens arra 120, used the shape of " linear foot cun: the rectangle of crossfoot cun=1: 4 ", but the invention is not restricted to this, so long as the shape that can throw light on discontinuously on image forming area for the animation display characteristic that can improve liquid-crystal apparatus gets final product.For example, also can suitably use the shape of " linear foot cun: the rectangle of crossfoot cun=9: 32 ", the shape of " linear foot cun: the rectangle of crossfoot cun=3: 8 " etc.
(3) above-mentioned example 5 and 6 projector 1008,1010, flat shape as the light emergence face of integrator rod 160, used the shape of " linear foot cun: the rectangle of crossfoot cun=1: 4 ", but the invention is not restricted to this, so long as the shape that can throw light on discontinuously on image forming area for the animation display characteristic that can improve liquid-crystal apparatus gets final product.For example, also can suitably use the shape of " linear foot cun: the rectangle of crossfoot cun=9: 32 ", the shape of " linear foot cun: the rectangle of crossfoot cun=3: 8 " etc.
(4) projector 1004 of above-mentioned example 3, as light-blocking member 780, used and possess and have the light-blocking member of peristome 782 of the flat shape of " along the axial linear foot of y cun: along the rectangle of the axial crossfoot of x cun=1: 4 ", but the invention is not restricted to this, so long as can throw light on discontinuously on the image forming area, get final product with the shape that can improve the animation display characteristic on the liquid-crystal apparatus.For example, also can use and possess and have the light-blocking member of opening of the flat shape of " along the axial linear foot of y cun: along the rectangle of the axial crossfoot of x cun=9: 32 ".In addition, when the 1st lenslet of the 1st lens arra is other the lenslet of flat shape that has beyond the flat shape of " along the axial linear foot of y cun: along the rectangle of the axial crossfoot of x cun=1: 4 ", also can use the light-blocking member that possesses opening with flat shape similar to the flat shape of this lenslet, light emergence face in integrator rod has under other the situation of integrator rod of flat shape beyond the flat shape of " along the axial linear foot of y cun: along the rectangle of the axial crossfoot of x cun=1: 4 ", also can use the light-blocking member that possesses the opening with flat shape similar to the flat shape of the light emergence face of this integrator rod.
(5) above-mentioned example 1～4 and 7 projector 1000～1006,1012, as light supply apparatus 110, used and had elliptical mirror 114, near the 1st focus of elliptical mirror 114, have the luminotron 112 of luminescent center and the light supply apparatus of parallelization lens 118, but the invention is not restricted to this, can also suitably use near the light supply apparatus that has parabolic mirror and the focus of parabolic mirror, have the luminotron of luminescent center.
(6) projector 1000～1012 of above-mentioned each example, as light supply apparatus 110,110B, use the light supply apparatus that on luminotron 112, is equipped with auxiliary mirror 116, but the invention is not restricted to this, also can suitably use the light supply apparatus that on luminotron, does not set auxiliary mirror.
(7) in above-mentioned each example, illustration has used the projector of 3 liquid- crystal apparatus 400R, 400G, 400B to illustrate, but the invention is not restricted to this, has also gone for using the projector of 1,2 or 4 or more a plurality of liquid-crystal apparatus.
(8) projector 1000～1012 of above-mentioned example as electro-optic modulation arrangement, has used liquid-crystal apparatus, but the invention is not restricted to this.As electro-optic modulation arrangement, in general,, also can utilize micro mirror type optic modulating device etc. so long as get final product according to the device of image information modulating the incident light.As the micro mirror type optic modulating device, for example, can use DMD (digital micromirror device) (trade mark of TI company).
(9) the present invention had both gone for also going for from the back projection type projector of a lateral projection opposite with observing projected image one side from observing the front projection type projector of projected image one lateral projection.

Claims (12)

1. projector, this projector possesses:
Electro-optic modulation arrangement according to the image information modulated illumination;
Projection is by the projection optical system of the illuminating bundle of aforementioned electric optic modulating device modulation;
Ejaculation has following cross sectional shape, promptly for the integral body of the side's directional lighting image forming area in the image forming area of aforementioned electric optic modulating device, such, along the lighting device of the illuminating bundle of the compressed cross sectional shape of aforementioned the opposing party's direction for the part of the opposing party's directional lighting image forming area; And
With the rotation of certain speed, make the illuminating bundle that comes from aforementioned illumination apparatus rotating prism along aforementioned the opposing party's scanning direction of the image forming area of aforementioned electric optic modulating device; It is characterized in that,
Further possesses the mode that on the image forming area of aforementioned electric optic modulating device, changes the illumination difference that produces because of the sweep velocity of aforementioned illuminating bundle to alleviate, according to the position on the aforementioned image forming area of aforementioned illuminating bundle, make the light transmission rate control device of the light transmission rate variation of illuminating bundle.
2. projector as claimed in claim 1 is characterized in that:
Aforementioned lights transmitance control device, the light transmission rate control circuit that has the light transmission rate control assembly and control the light transmission rate of aforementioned lights transmitance control assembly.
3. projector as claimed in claim 2 is characterized in that:
The aforementioned electric optic modulating device is a liquid-crystal apparatus;
Further possess aforementioned illuminating bundle is unified into the roughly polarization conversion device of a kind of linearly polarized light;
Aforementioned lights transmitance control assembly, the polarization plates that has the polarization direction control assembly of controlling according to the control that comes from aforementioned lights transmitance control circuit, to the aforementioned roughly polarization direction of a kind of linearly polarized light and the polarized component of the side from the illuminating bundle that aforementioned polarization direction control assembly penetrates is seen through.
4. projector as claimed in claim 3 is characterized in that:
Aforementioned polarization plates is provided on the light emergence face of aforementioned polarization direction control assembly.
5. projector as claimed in claim 3 is characterized in that:
With being configured on the light entrance face side of aforementioned electric optic modulating device, being used to make the unified light incident side polarization plates in polarization direction, use as aforementioned polarization plates to the illuminating bundle of aforementioned electro-optic modulation arrangement incident.
6. as any described projector of claim 2～5, it is characterized in that:
The rotation status detecting sensor that further possesses the rotation status that detects aforementioned rotating prism;
Aforementioned lights transmitance control circuit, according to the output signal of aforementioned rotation status detecting sensor, the light transmission rate of control aforementioned lights transmitance control assembly.
7. as any described projector of claim 2～5, it is characterized in that:
The image processing circuit that further possesses the processing of carrying out image information;
Aforementioned rotating prism is constituted as according to the synchronizing signal that comes from aforementioned image processing circuit, with certain speed rotation;
Aforementioned lights transmitance control circuit, according to the synchronizing signal that comes from aforementioned image processing circuit, the light transmission rate of control aforementioned lights transmitance control assembly.
8. as any described projector of claim 2～7, it is characterized in that:
Aforementioned illumination apparatus has: possess luminotron and catoptron, penetrate the light supply apparatus of illuminating bundle to illuminated area side; Have and be used for to be divided into the 1st lens arra of a plurality of the 1st lenslets of a plurality of segment beams from the illuminating bundle of aforementioned light supply apparatus ejaculation; Has the 2nd lens arra with corresponding a plurality of the 2nd lenslets of a plurality of the 1st lenslets of aforementioned the 1st lens arra; And be used to make the each several part light beam that penetrates from aforementioned a plurality of the 2nd lenslets of aforementioned the 2nd lens arra overlapping overlapping lens on aforementioned lights transmitance control assembly;
Aforementioned the 1st lenslet has along the compressed flat shape of aforementioned the opposing party's direction.
9. as any described projector of claim 1～7, it is characterized in that:
Aforementioned illumination apparatus, be to have to possess luminotron and elliptical mirror, penetrate the light supply apparatus of convergent illuminating bundle, and the illuminating bundle that will come from the aforementioned lights source apparatus is transformed into the lighting device of the integrator rod of the illuminating bundle with more uniform intensity distributions to illuminated area side;
The light emergence face of aforementioned integrator rod has along the compressed flat shape of aforementioned the opposing party's direction.
10. as any described projector of claim 1～9, it is characterized in that:
Aforementioned rotating prism is configured in and the aforementioned image forming area of aforementioned electric optic modulating device optically roughly on the position of conjugation.
11. any described projector as claim 2～9 is characterized in that:
Aforementioned polarization direction control assembly is configured in and the aforementioned image forming area of aforementioned electric optic modulating device optically roughly on the position of conjugation.
12. projector as claimed in claim 11 is characterized in that:
Aforementioned polarization direction control assembly, and then have the function of carrying out the light-blocking member of shaping as the cross sectional shape that is used for illumination beam.
CN 200610058069 2005-02-28 2006-02-28 Projector Pending CN1828403A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP052597/2005 2005-02-28
JP2005052597 2005-02-28
JP321819/2005 2005-11-07

Publications (1)

Publication Number Publication Date
CN1828403A true CN1828403A (en) 2006-09-06

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN 200610058069 Pending CN1828403A (en) 2005-02-28 2006-02-28 Projector

Country Status (1)

Country Link
CN (1) CN1828403A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106054503A (en) * 2015-04-07 2016-10-26 现代自动车株式会社 Projection display

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106054503A (en) * 2015-04-07 2016-10-26 现代自动车株式会社 Projection display

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Open date: 20060906