CN1387067A - Dual-light-valve projection display - Google Patents
Dual-light-valve projection display Download PDFInfo
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- CN1387067A CN1387067A CN 01115725 CN01115725A CN1387067A CN 1387067 A CN1387067 A CN 1387067A CN 01115725 CN01115725 CN 01115725 CN 01115725 A CN01115725 A CN 01115725A CN 1387067 A CN1387067 A CN 1387067A
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Abstract
A dual-light-valve projection display is composed of the first and the second optical polarization selectors, a polarized light splitting prism, a colour control switch, the first and the second bichromic splitters, two light valves, and a lens. The incident light beam is splitted into the first, the second and the third colour light beams, which are regulated by two light valves and then projected by lens. Its advantages is the improvement on light leakage.
Description
The present invention relates to a kind of projection display equipment, particularly relate to a kind of dual-light-valve projection display.
Image on the present display; mainly compiling synthetic luminous point pixel by Red Green Blue light is formed; and in order to promote the development quality and the usefulness of display; generally utilize camera lens with ray cast before display, the light beam that light emitted can be gone out is handled, to reach the image quality of Cui through control; wherein; in the processing procedure of light beam, regular meeting has the situation of inclined to one side light leak to take place, so manufacturer is detailed in the research and development improvement at this light leak situation.
But be the polar biased light Amici prism (PBS) 11 that a kind of projection display equipment 1 in the past has the coloured light of a vertical reflection S polarization and allows the coloured light of P polarization directly penetrate as shown in Figure 1, this polar biased light Amici prism 11 has a light inlet side 111, one first beam split side 112, one second beam split side 113, an and bright dipping side 114, and this projection display equipment 1 has more contiguous allowed a P polarized light of this light inlet side 111 that is positioned at by absorbing first Polarizer (P-state Polarizer) 12 of S polarized light, one is positioned at the first light polarization selector switch (ColorSelect) 13 that red polarization polarization state of light can be done conversion between this Polarizer 12 and this light inlet side, two lay respectively at first, the second beam split side 112, first of 113 sides, second light valve 14,15, the one color gauge tap (Color Switch) 16 that is positioned at this second light valve 15 and this 113 of second beam split side and can allows particular color pass through in regular turn, one is positioned at the second light polarization selector switch (ColorSelect) 17 of these bright dipping side 114 sides, be positioned at second Polarizer (S-state Polarizer) 18 that penetrates on the light path of light of this second light polarization selector switch 17, and a camera lens 19 that receives by the ray cast video picture of this second Polarizer 18.This second Polarizer 18 can be used to block the ejaculation of the coloured light of non-S polarization (being exactly the P polarization).When these first, second light valve 14,15 conductings, modulation and change the polarization state of its polarization coloured light in addition, and reciprocal different polarization coloured light is sent in reflection, in explanation is to set this first, second light valve 14,15 to be the state of conducting.In addition, can be respectively equipped with one 1/4 ripple plates (QWP) towards a side of light, to increase the contrast of image at this first, second light valve 14,15.
When using, when the white light 10 of a tool polarization state (for example P polarization) was projected to this first Polarizer 12, first coloured light (as red light) 101 of this P polarization and second and third coloured light (as blue, green light) 102,103 was all by this first Polarizer 12.Then each coloured light is by this first light polarization selector switch 13, and this first coloured light 101 is transformed into the S polarization, and second and third coloured light the 102, the 103rd is kept original P polarization.When these coloured light are delivered to this polar biased light Amici prism 11, be that first coloured light, 101 vertical reflections of this S polarization are delivered to this first light valve 14, and make second and third coloured light 102,103 of this P polarization directly penetrate polar biased light Amici prism 11.This second and third coloured light 102,103 is the control by this color gauge tap 16 by behind this polar biased light Amici prism 11, makes second and third coloured light 102,103 arrive at this second light valve 15 in regular turn.Because of the course and the characteristic of this second and third coloured light are all identical, below explanation is an example with second coloured light 102 only.
When these first, second light valve 14,15 conductings, after first coloured light 101 of this S polarization is subjected to the modulation of this first light valve 14 and changes polarization state, be first coloured light 101 that the P polarization is sent in reflection in the other direction, by this polar biased light Amici prism 11, and change polarization states through this second light polarization selector switch 17 and become the S polarization, then obtain more S polarization first coloured light 101 of purifying, be incident upon on the default screen through camera lens 19 by second Polarizer 18.Second coloured light 102 of this P polarization is subjected to these second light valve, 15 modulation back reflections to send reciprocal S polarization second coloured light 102, then again through the vertical reflection of this polar biased light Amici prism 11, and turn to by this second light polarization selector switch 17 and second Polarizer 18, make more second coloured light 102 of the S polarization of purifying is incident upon on the default screen through camera lens 19, with first coloured light, 101 resultant images.
This in the past projection display equipment 1 reach white light isolated coloured light by above-mentioned member, and via the effect of being closed light again behind each light valve modulation.But in the part of general optical system, this polar biased light Amici prism is because of being subjected to the characteristic of limits of fabrication techniques known today and polarization coloured light, P polarization coloured light can not have the very high efficient that penetrates, therefore when P polarization coloured light directly passes through this polar biased light Amici prism, have the inclined to one side light leakage phenomena (shown in dotted arrow among the figure) that little part P polarization coloured light produces vertical reflection, similarly this S polarization coloured light also has the phenomenon that part light leaks direct projection partially, but the P polarization coloured light that inclined to one side leakage quantity leaks more partially is low.
With in the past polar biased light Amici prism 11 is example, if P polarization coloured light by the time can produce 10% inclined to one side light leak, if S polarization coloured light by the time then can produce 2% inclined to one side light leak.Therefore, with regard to the inclined to one side light leak amount of integral body, when this S polarization first coloured light 101 when 11 reflections of this polar biased light Amici prism turn to, have the first inclined to one side light leak 101 ' of 2% first coloured light 101, directly by this polar biased light Amici prism 11, enter second light valve, 15 change polarization states and become the P polarization, and the first inclined to one side light leak 101 ' of this P polarization is when being reflected by this polar biased light Amici prism 11, can have again 10% the first inclined to one side light leak 101 ' first more partially light leak 101 " be reflected and turn to; be projected to this camera lens 19, the inclined to one side leakage quantity of light that therefore enters first coloured light of camera lens 19 is 0.02 * 0.1=0.002.And the light of this P polarization second coloured light 102 leaks partially, be the time directly by this polar biased light Amici prism 11,10% second coloured light 102 is had the second inclined to one side light leak 102 ' by vertical reflection, enter these second light valve, 15 change polarization states and become the S polarization, then the second inclined to one side light leak 102 ' of this S polarization is reflected by this polar biased light Amici prism 11, the second inclined to one side light leak 102 ' of this moment 98% is got back to this first light polarization selector switch 13 by vertical reflection, and leak second light leak 102 partially again that Yu is stayed 2% the second inclined to one side light leak 102 partially "; then be projected to this camera lens 19, the inclined to one side leakage quantity of light that therefore enters second coloured light of camera lens 19 is 0.1 * 0.02=0.002.These inclined to one side light leaks that enter camera lens 19 in a large number will seriously cause the quality badness of display image.
Fundamental purpose of the present invention is to be to provide a kind of dual-light-valve projection display, can significantly reduce the inclined to one side light leak amount that enters camera lens, to promote image quality.
The invention provides a kind of dual-light-valve projection display, include first, second light polarization selector switch, a polar biased light Amici prism, a color gauge tap, first, second double-colored beam splitter, first, second light valve, and a camera lens; Can be used to the light beam of light source of an incident is isolated first coloured light and second and third coloured light that can synthesize this light beam, make these coloured light be subjected to this first, second reflective light valve modulation respectively after, export again via the camera lens projection, it is characterized in that:
This polar biased light Amici prism, have a light inlet side, one first beam split side, one second beam split side, an and bright dipping side, this light inlet side and bright dipping side are respectively adjacent to this first, second light polarization selector switch, the separable incident light that goes out the different polarization states that enters by the light inlet side, and respectively will this first beam split side certainly and the second beam split side penetrate;
This first, second light polarization selector switch, be to be installed on the light path of described incident light source respectively and these coloured light are projected on the light path of camera lens, light inlet side and bright dipping side with this polar biased light Amici prism is adjacent respectively, the polarization state that this first light polarization selector switch can change coloured light makes first coloured light opposite with the polarization state of second and third coloured light, and making of the light inlet side input of these coloured light by this polar biased light Amici prism, this second light polarization selector switch then is that the polarization state that changes coloured light makes first coloured light identical with the polarization state of second and third coloured light;
This color gauge tap is that export on the light path of second and third coloured light at this polar biased light Amici prism the position, can hold the predetermined coloured light of selecting and pass through in regular turn; And
This first, second double-colored beam splitter, be to be separately positioned on this polar biased light Amici prism to export on the direction of first coloured light, and in regular turn on the light path of second and third coloured light by this color gauge tap, be that this first coloured light and second and third coloured light are projected first, second light valve respectively.
Described dual-light-valve projection display, it is characterized in that: this projection display equipment more comprises first Polarizer on the light path that enters this first light polarization selector switch at these coloured light, and one is penetrated second Polarizer of coloured light on the light path of camera lens at this second light polarization selector switch.
Described dual-light-valve projection display is characterized in that: this first, second light polarization selector switch is to be installed in respectively between this polar biased light Amici prism and first, second Polarizer; This color gauge tap is that the position is in the adjacent side of the second beam split side of this polar biased light Amici prism; This first, second double-colored beam splitter is to be separately positioned on the adjacent side of the first beam split side of this polar biased light Amici prism and the adjacent side of this color gauge tap; This first, second light valve is to be separately positioned on this first, second adjacent side of double-colored beam splitter.
Described dual-light-valve projection display is characterized in that: this projection display equipment more comprises 2 1/4 ripple plates, be respectively the position between this first, second double-colored beam splitter and pairing first, second light valve.
Described dual-light-valve projection display is characterized in that: this projection display equipment more comprises an optical path compensation plate, and this optical path compensation plate is that the position is between this polar biased light Amici prism and the first double-colored beam splitter.
Described dual-light-valve projection display, it is characterized in that: this first, second double-colored beam splitter is respectively a right-angle prism, with relative this first beam split side and color gauge tap first and second advances plain edge, and advances connected vertically first and second of plain edge with respect to this first, second light valve and with this first and second respectively and go out plain edge, and one be connected in obliquely respectively this first and second advance first and second hypotenuse between the tail end that plain edge and first and second go out plain edge, plating is provided with first and second double-colored spectro film on this first and second hypotenuse.
Described dual-light-valve projection display is characterized in that: this first, second double-colored beam splitter is respectively a double-colored Amici prism that is formed by two right-angle prisms gummeds.
Described dual-light-valve projection display is characterized in that: this first, second double-colored beam splitter is respectively a glass plate, and plating is provided with a double-colored spectro film on the wherein side plane of each glass plate.
A kind of dual-light-valve projection display of the present invention comprises: first, second light polarization selector switch, a polar biased light Amici prism, first, second double-colored beam splitter, first, second light valve and a camera lens.Can be used to a light beam of light source is isolated first, second coloured light that can synthesize this light beam, make the polarization state quadrature of this first coloured light and second coloured light, and make this first, second coloured light be subjected to this first, second light valve modulation respectively, and when the light valve conducting, change the polarization state back reflection, afterwards again via camera lens output projection.This first, second light polarization selector switch is to be installed in described light source respectively to penetrate on the light path of first, second coloured light and this first, second coloured light is projected on the light path of camera lens, this first light polarization selector switch can change polarization state of light wherein of the same colour makes the polarization state of first, second coloured light opposite, and this second light polarization selector switch then is to change polarization state of light wherein of the same colour to make the polarization state of first, second coloured light identical.This polar biased light Amici prism is arranged between this first, second light polarization selector switch, and will be by first, second coloured light of this first light polarization selector switch, respectively towards non-two side directions adjacent with this first, second light polarization selector switch projection.This first, second double-colored beam splitter is to be separately positioned on this polar biased light Amici prism to export on the direction of first, second coloured light, is that first, second coloured light is projected first, second light valve respectively.
Dual-light-valve projection display of the present invention, can be with a large amount of inclined to one side light leak pass-outs, enter in this dual-light-valve projection display through camera lens ejaculation projection to avoid this isogonic light leak to return, therefore the present invention can stablize the white coordinate of GTG of imaging effect, improve the contrast of image, to promote the display quality.
The present invention is described in detail below in conjunction with drawings and Examples:
Fig. 1 is the structural representation of projection display equipment in the past.
Fig. 2 is one first structural representation than Cui embodiment of dual-light-valve projection display of the present invention.
Fig. 3 is one second structural representation than Cui embodiment.
Fig. 4 is one the 3rd structural representation than Cui embodiment.
Fig. 5 is one the 4th structural representation than Cui embodiment.
Fig. 6 is one the 5th structural representation than Cui embodiment.
Fig. 7 is one the 6th structural representation than Cui embodiment.
Fig. 8 is one the 7th structural representation than Cui embodiment.
For convenience of description, following embodiment, components identical is represented with identical label.
As shown in Figure 2, be first embodiment of dual-light-valve projection display of the present invention, this dual-light-valve projection display 2 includes: one first Polarizer (P-state Polarizer) 21, one second Polarizer (S-state Polarizer) 22, one first, the second light polarization selector switch (ColorSelect) 231,232, one polar biased light Amici prism (PBS) 24, one first, the second double-colored beam splitter 251,252, one first, second light valve (LcoSpanel (Colorsequential)) 261,262, one color gauge tap (ColorSwitch) 27, one first, the 2 1/4 ripple plate (QWP) 281,282, an one optical path compensation plate 283 and a camera lens 29.
The member of present embodiment is with in orientation shown in Figure 2, roughly be to be that the center is right-angled intersection and arranges with this polar biased light Amici prism 24, this first Polarizer 21 just, the first light polarization selector switch 231, polar biased light Amici prism 24, color gauge tap 27, the second double-colored beam splitter 252, it is the series arrangement that is from bottom to top, and this first double-colored beam splitter 251, optical path compensation plate 283, polar biased light Amici prism 24, the second light polarization selector switch 232, second Polarizer 22, camera lens 29, it is the series arrangement that is by right and left, other has 262 of the 2 1/4 ripple plate 282 and this second light valves in the left side of this second double-colored beam splitter 252, and the one 1/4 ripple plate 281 and 261 upsides at this first double-colored beam splitter 251 of this first light valve.One light beam 20 is that the below by this first Polarizer 21 enters, and is penetrated by these camera lens 29 lefts, to be incident upon resultant image on the default screen.One white light 20 can be isolated first coloured light (as red light) 201 and second and third coloured light (as blue, green light) 202,203 that can synthesize this white light 20 during use, make this first coloured light 201 be subjected to corresponding first light valve, 261 modulation process that are provided with, second and third coloured light 202,203 then utilizes color gauge tap 27 to deliver to second light valve, 262 modulation process in regular turn.Path and characteristic because of this second and third coloured light 202,203 is all identical again, below only with 202 explanations of second coloured light, simultaneously, followingly explain when all being conducting with first, second light valve 261,262, and be the convenience in the explanation, to be denoted as 201S, 202S respectively by first, second coloured light of S polarization, will be denoted as 201P, 202P respectively by first, second coloured light of P polarization in addition.
This first, second Polarizer 21,22 can make the coloured light of different polarization pass through respectively, light is a kind of electromagnetic wave, it contains the composition of a plurality of different moments of vibration, and Polarizer allows an a certain certain vibration perpendicular to the light direct of travel pass through only, other compositions then are absorbed, so for the screen of only allowing that a certain polarization coloured light passes through, this first Polarizer 21 is to use so that the coloured light of P polarization passes through in the present embodiment, and the coloured light of S polarization is absorbed, and second Polarizer 22 is to use so that the coloured light of S polarization passes through, and the coloured light of P polarization is absorbed.In Fig. 2, this first Polarizer 21 be over against the position at the place that enters of this first, second coloured light 201,202, first, second coloured light 201P, the 202P of P polarization are passed through.22 positions of second Polarizer are on the right side of this camera lens 29, only allow first, second coloured light 201S, the 202S of S polarization by entering camera lens 29, with so that each coloured light of the S polarization state of passing through purifying more.
This first, second light polarization selector switch 231,232 can use the ColorSelect Filters product of ColorLink company manufacturing, its effect is the predetermined color polarisation of light can be changed, for example will originally be transformed into P (S) polarization coloured light for S (P) polarization coloured light, this first light polarization selector switch 231 is that the position is on the light path of the coloured light that passes through this first Polarizer 21 in the present embodiment, the first coloured light 201P of P polarization can be transformed into the first coloured light 201S of S polarization, and the second coloured light 202P keeps still the P polarization to pass through.And this second light polarization selector switch 232 be the position 22 of this polar biased light Amici prism 24 and second Polarizers, can be by the first coloured light 201P of the P polarization of polar biased light Amici prism 24 ejaculations, deliver to second Polarizer 22 after being transformed into the S polarization.
But the coloured light of these polar biased light Amici prism 24 vertical reflection S polarizations, and allow the coloured light of P polarization directly penetrate.This polar biased light Amici prism 24 has light inlet side 241, one first beam split side 242, the one second beam split side 243 of contiguous this first light polarization selector switch 231, and leans on the bright dipping side 244 of this second light polarization selector switch 232 in the lump.When first, second coloured light 201S, 202P by this first light polarization selector switch 231 are entered by this light inlet side 241, the first coloured light 201S vertical-right of S polarization can be reflected, and make the second coloured light 202P of P polarization directly upwards pass through.
This color gauge tap 27 can be the one chip product that Color Link company is produced, the white light (or mixed-color light) that can will pass through, isolate three kinds of coloured light of red, green, blue (Color Sequencial) according to time sequencing, so can hold the predetermined coloured light of selecting passes through in regular turn, just the monochrome of three kinds of coloured light of may command red, green, blue is passed through, or double-colored passing through, or pass through together.In present embodiment, this color gauge tap 27 is and is located at the second beam split side, 243 tops of this polar biased light Amici prism 24, makes first, second coloured light 201,202 alternately pass.
This optical path compensation plate 283 is that the position is right-hand in the first beam split side 242 of this polar biased light Amici prism 24, is to be used to compensate light path, can make that the coloured light of different conduct directions has equal light path after the beam split.This optical path compensation plate 283 also can be one-body molded with the described later first double-colored beam splitter 251.
This first, second double-colored beam splitter the 251, the 252nd, adjacent respectively and in this optical path compensation plate 283 and color gauge tap 27.This double-colored beam splitter is a double-colored Amici prism in the present embodiment, can be and have a beam splitter layer that overlaps and form by the film of the different tortuosity ratios of multilayer, and by the design of material, thickness and the number of plies of control film, incident ray is seen through or reflection in the certain wavelengths scope, the coloured light that order has different wave length presents the state that penetrates or reflect respectively, and can be on being provided with according to the path needs of light, this beam splitter layer can be with predetermined angle setting.Certainly, this first, second double-colored beam splitter also can be respectively a double-colored Amici prism that is formed by two right-angle prisms gummed on making.In the present embodiment, this first double-colored beam splitter 251 can reflect this first coloured light 201 and hold second coloured light 202 and pass through, and 252 of this second double-colored beam splitters are with these second coloured light, 202 reflections and make first coloured light 201 pass through.This first double-colored beam splitter 251 is right-hand at this optical path compensation plate 283, position, the first coloured light 201S vertical reflection of this S polarization that will be by optical path compensation plate 283 upwards, and 252 of this second double-colored beam splitters are above this color gauge tap 27, and order is penetrated left by the P polarization second coloured light 202P vertical reflection of this color gauge tap 27.
This first, second 1/4 ripple plate the 281, the 282nd, a side of coloured light is penetrated at this first, second double-colored beam splitter 251,252 in the position respectively, can be in order to increase the contrast of picture.
These first, second light valves 261,262 are all optical valve in reflection type, can throw on it respectively and during conducting at above-mentioned first, second coloured light 201,202, in addition modulation and change the polarization state of its polarization and reflect and send reciprocal different polarization coloured light.This first, second light valve 261,262 is corresponding respectively to be located at the top and the left of this first, second 1/4 ripple plate 281,282, this first light valve 261 is the first coloured light 201S that receive from this S polarization of the one 1/4 ripple plate 281, and in addition the first coloured light 201P of P polarization is sent in the modulation reflection, and this second light valve 262 is the second coloured light 202P that receive from this P polarization of the 2 1/4 ripple plate 282, and in addition the second coloured light 202S of S polarization is sent in the modulation reflection.
When using, when this first coloured light 201 that is polarized upwards throws, the first coloured light 201P of this P polarization can pass through this first Polarizer 21, and by this first light polarization selector switch 231 time, be transformed into the S polarization, the first coloured light 201S of this S polarization is projection upwards, the reflection of when running into polar biased light Amici prism 24, being turned right, enter this first double-colored beam splitter 251 through this optical path compensation plate 283, and upwards by these first double-colored beam splitter 251 reflections, arrive at this first light valve 261 by the one 1/4 ripple plate 281, be subjected to send the opposite direction P polarization first coloured light 201P down behind first light valve, 261 modulations, reflect left by the one 1/4 ripple plate 281 and by this first double-colored beam splitter 251, again in regular turn by this optical path compensation plate 283, polar biased light Amici prism 24, when entering this second light polarization selector switch 232, the first coloured light 201P of this P polarization is transformed into the S polarization, obtains the more S polarization first coloured light 201S of purifying, arrive at this camera lens 29 by this second Polarizer 22.
And second coloured light 202 that this is polarized is when upwards throwing, the second coloured light 202P of this P polarization can pass through this first Polarizer 21 and the first light polarization selector switch 231, and upwards by this polar biased light Amici prism 24, color gauge tap 27, after entering this second double-colored beam splitter 252 is to be reflected left, deliver to this second light valve 262 by the 2 1/4 ripple plate 282, be subjected to send the S polarization second coloured light 202S that turns right in the other direction behind second light valve, 262 modulations, again by the 2 1/4 ripple plate 282 and downward by these second double-colored beam splitter 252 reflections, by this color gauge tap 27, by these polar biased light Amici prism 24 reflections left, through this second light polarization selector switch 232 and this second Polarizer 22, arrive at this camera lens 29.
With regard to the light of the optical system components of present embodiment leaks partially, when polarization coloured light during by this polar biased light Amici prism 24 and this first, second double-colored beam splitter 251,252, characteristic because of this polar biased light Amici prism 24 and this first, second double-colored beam splitter 251,252, the light that can produce little part leaks phenomenon partially, in the present embodiment, when P polarization coloured light by the time, 10% the inclined to one side light leak of can having an appointment, when S polarization coloured light by the time, 1% the inclined to one side light leak of can having an appointment.
The leakage polarisation of this of present embodiment first coloured light 201 (among the figure shown in the dotted arrow) is: as this first coloured light 201S during by this polar biased light Amici prism 24, have 99% the first coloured light 201S and be reflected to the right, and the first inclined to one side light leak that one 1% the first coloured light 201S arranged is directly by this polar biased light Amici prism 24.When this first inclined to one side light leak upwards enters this second double-colored beam splitter 252, the second inclined to one side light leak that has one 10% the first inclined to one side light leak is entered this second light valve 262 left by these second double-colored beam splitter 252 reflections, the 3rd inclined to one side light leak that one 90% the first inclined to one side light leak is arranged is outwards penetrated by the top then directly by this second double-colored beam splitter 252.Then this second inclined to one side light leak is changed over the P polarization state by second light valve 262, be reflected again and enter this second double-colored beam splitter 252, and the 4th inclined to one side light leak that one 10% the second inclined to one side light leak arranged by these second double-colored beam splitter 252 reflections downwards, and the 5th inclined to one side light leak of one 90% the second inclined to one side light leak directly penetrates to the right outside this second double-colored beam splitter 252.The 4th inclined to one side light leak is in this polar biased light Amici prism 24, and the 6th inclined to one side light leak that has one 90% the 4th inclined to one side light leak is outwards penetrated by the below, and the 7th inclined to one side light leak of one 10% the 4th inclined to one side light leak is reflected left, arrives at this camera lens 29.Calculating this light leak amount that influences the 7th inclined to one side light leak of image quality is: 0.01 * 0.1 * 0.1 * 0.1=0.00001.
And the leakage polarisation of second coloured light 202 of present embodiment (among the figure shown in the dotted arrow) is: as this second coloured light 202P during by this polar biased light Amici prism 24, have 90% the second coloured light 202P and directly send into this second double-colored beam splitter 252, and have the first inclined to one side light leak of one 10% the second coloured light 202P to be reflected to the right.This first inclined to one side light leak enter this first double-colored beam splitter 251 after, the second inclined to one side light leak that has first an inclined to one side light leak of one 90% is directly by the right-hand pass-out of this first double-colored beam splitter 251, upwards enters first light valve 261 and there is the 3rd inclined to one side light leak of one 10% the first inclined to one side light leak to be reflected.After the 3rd inclined to one side light leak is changed over the S polarization by first light valve 261 and is reflected onto this first double-colored beam splitter 251, the 4th inclined to one side light leak that has one 10% the 3rd inclined to one side light leak is reflected and enters this polar biased light Amici prism 24, penetrates and there is the 5th inclined to one side light leak of one 90% the 3rd inclined to one side light leak directly to be passed down through this first double-colored beam splitter 251.The 4th inclined to one side light leak is during through this polar biased light Amici prism 24, the 6th inclined to one side light leak that has the 4th an inclined to one side light leak of the one 99% downward ejaculation that is reflected, and the direct pass-out left of the 7th inclined to one side light leak that one 1% the 4th inclined to one side light leak arranged enters this camera lens 29.Calculating this light leak amount that influences the 7th inclined to one side light leak of image quality is: 0.1 * 0.1 * 0.1 * 0.01=0.00001.
Therefore present embodiment is at last by the inclined to one side light leak of this camera lens 29, quite littlely vastly influences imaging effect to being unlikely, and the GTG that will stablize imaging effect is the field coordinate in vain, and the contrast of image also can improve really, and can make the display quality-improving.
As shown in Figure 3, it is the second embodiment of the present invention, the structure of present embodiment is roughly same with first embodiment, this dual-light-valve projection display 3 includes equally: first, second Polarizer 31,32, first, second light polarization selector switch 331,332, a polar biased light Amici prism 34, first, second double-colored beam splitter 351,352, first, second light valve 361,362, a color gauge tap 37, first, second 1/4 ripple plate 381,382, an optical path compensation plate 383, and a camera lens 39.Only present embodiment is different with this first embodiment be in: present embodiment is to use and is respectively first of a triangle right-angle prism, the second double-colored beam splitter 351,352, replace and replace among first embodiment dimetric first, the second double-colored beam splitter, this of present embodiment first, the second double-colored beam splitter 351,352 have respectively one with this optical path compensation plate 383 and color gauge tap 37 adjacent and first, two advance plain edge 353,354, one respectively with this first, the 2 1/4 ripple plate 381,382 adjacent and and with this first, two advance plain edge 353,354 connected vertically first, two go out plain edge 355,356, and one be connected in obliquely respectively this first, two advance plain edge 353,354 and first, two go out plain edge 355, between a tail end of 356 first, two hypotenuses, this is first years old, plating is provided with first on two hypotenuses, two double-colored spectro films 357,358, these double-colored spectro films 357,358 character, the position, angle is identical with this first embodiment, so result of use is identical with first embodiment.
As shown in Figure 4, it is the third embodiment of the present invention, the structure of present embodiment is roughly same with first embodiment, this dual-light-valve projection display 4 of present embodiment is different with this first embodiment is in: present embodiment is one first double-colored beam splitter 41 to be replaced as can hold one first coloured light 401 and pass through, and one second coloured light 402 is reflected the double-colored beam splitter that turns to, and one second double-colored beam splitter 42 is replaced as holds second coloured light 402 and pass through, and first coloured light 401 is reflected the double-colored beam splitter that turns to, and one first light valve 43 is arranged on the side that this first coloured light 401 penetrates the first double-colored beam splitter 41, right-hand at this first double-colored beam splitter 41, position just, one second light valve 44 is arranged on the top of this second double-colored beam splitter 42.When using, when first coloured light 401 is reflected to the right by a polar biased light Amici prism 45, when delivering to the first double-colored beam splitter 41, can directly enter first light valve 43 by the first double-colored beam splitter 41, the inclined to one side light leak of little part then upwards passes outside this first double-colored beam splitter 41, then the inclined to one side light leak that reflects first coloured light 401 that enters this first double-colored beam splitter 41 again through first light valve 43 is also passed by the below, and the inclined to one side light leak that first coloured light 401 is had in polar biased light Amici prism 45, after directly entering this second double-colored beam splitter 42, exhausted major part is left or the right-hand pass-out towards this second double-colored beam splitter 42, has only minute portions this polar biased light Amici prism 45 of pass-out left.And when second coloured light 402 is upwards delivered to the second double-colored beam splitter 42, can directly upwards enter second light valve 44 by the second double-colored beam splitter 42, the inclined to one side light leak of little part then passes left outside this second double-colored beam splitter 42, similarly, the inclined to one side light leak that reflects second coloured light 402 that enters this second double-colored beam splitter 42 through second light valve 44 is also passed by right-hand, and the inclined to one side light leak that second coloured light 402 is had in polar biased light Amici prism 45, be reflected enter this first double-colored beam splitter 41 after, exhausted major part pass-out above or below this first double-colored beam splitter 41 has only minute portions this polar biased light Amici prism 45 of pass-out left.
As shown in Figure 5, it is the fourth embodiment of the present invention, the structure of present embodiment and the 3rd embodiment is roughly the same, this dual-light-valve projection display 5 of present embodiment is different with the 3rd embodiment be in: present embodiment is first, second beam splitter layer 511,521 in order to beam split with first, second double- colored beam splitter 51,52, angle with setting is out of the ordinary different with the 3rd embodiment, and one is positive 45.Inclination, one is negative 45.Tilt, and one first light valve is the below that correspondence is arranged on this first double-colored beam splitter 51.In the use, the upper and lower of first, second double- colored beam splitter 51,52 of inclined to one side light leak pass-out of major part or left and right side etc. non-ly can be gone out equally, the light inlet side.
As shown in Figure 6, it is the fifth embodiment of the present invention, the structure of present embodiment is roughly same with first embodiment, this dual-light-valve projection display 6 of present embodiment is different with this first embodiment be in: present embodiment is to use the coloured light of S polarization, and one first Polarizer 61 is replaced as the S attitude Polarizer (S-state Polarizer) of the coloured light of the coloured light that can hold a S polarization by absorbing a P polarization, and one first light polarization selector switch 62 is designed to can become the P polarization by the S optical rotation with this second coloured light 602, and make first coloured light 601 still keep the S polarization to pass through.
As shown in Figure 7, it is the sixth embodiment of the present invention, the structure of present embodiment is roughly same with first embodiment, this dual-light-valve projection display 7 of present embodiment is different with this first embodiment be in: present embodiment is that the installation position of a color gauge tap 71 and an optical path compensation plate 72 is exchanged, and with pairing first, second light valve 73,74 position is exchanged, just this color gauge tap 71 and second light valve 74 are right-hand at a polar biased light Amici prism 75, position, and 73 of this optical path compensation plate 72 and first light valves are above this polar biased light Amici prism 75, utilize the collocation of one first Polarizer 76 and one first light polarization selector switch 77 simultaneously, allow one first coloured light 701 that enters this polar biased light Amici prism 75 be the P polarization, and one second coloured light 702 is the S polarization.During use, this first coloured light 701 can enter this first light valve 73 by this optical path compensation plate 72, and this second coloured light 702 can be reflected and turns to by this color gauge tap 71, and enters this second light valve 74.
As shown in Figure 8, it is the seventh embodiment of the present invention, the structure of present embodiment is roughly same with first embodiment, this dual-light-valve projection display 8 of present embodiment is different with this first embodiment be in: first, second double- colored beam splitter 81,82 of present embodiment is respectively a glass plate, plating is provided with a double-colored spectro film on the wherein side plane of each glass plate, and the spectroscopic property that angle and double-colored spectro film are set of this first, second double- colored beam splitter 81,82 is all identical with this first embodiment.
Take a broad view of above-mentioned, the present invention can provide a kind of dual-light-valve projection display really, can be with a large amount of inclined to one side light leak pass-outs, enter in this dual-light-valve projection display through camera lens ejaculation projection to avoid this isogonic light leak to return, therefore the present invention can stablize the white coordinate of GTG of imaging effect, improve the contrast of image, to promote the display quality.
Claims (8)
1. a dual-light-valve projection display includes first, second light polarization selector switch, a polar biased light Amici prism, a color gauge tap, first, second double-colored beam splitter, first, second light valve, and a camera lens; It is characterized in that:
This polar biased light Amici prism has a light inlet side, one first beam split side, one second beam split side, and a bright dipping side, and this light inlet side and bright dipping side are respectively adjacent to this first, second light polarization selector switch;
This first, second light polarization selector switch is to be installed on the light path of described incident light source respectively and these coloured light are projected on the light path of camera lens, and light inlet side and the bright dipping side with this polar biased light Amici prism is adjacent respectively;
This color gauge tap is that export on the light path of second and third coloured light at this polar biased light Amici prism the position; And
This first, second double-colored beam splitter, be to be separately positioned on this polar biased light Amici prism to export on the direction of first coloured light, and in regular turn on the light path of second and third coloured light by this color gauge tap, be that this first coloured light and second and third coloured light are projected first, second light valve respectively.
2. dual-light-valve projection display as claimed in claim 1, it is characterized in that: this projection display equipment more comprises first Polarizer on the light path that enters this first light polarization selector switch at these coloured light, and one is penetrated second Polarizer of coloured light on the light path of camera lens at this second light polarization selector switch.
3. dual-light-valve projection display as claimed in claim 2 is characterized in that: this first, second light polarization selector switch is to be installed in respectively between this polar biased light Amici prism and first, second Polarizer; This color gauge tap is that the position is in the adjacent side of the second beam split side of this polar biased light Amici prism; This first, second double-colored beam splitter is to be separately positioned on the adjacent side of the first beam split side of this polar biased light Amici prism and the adjacent side of this color gauge tap; This first, second light valve is to be separately positioned on this first, second adjacent side of double-colored beam splitter.
4. dual-light-valve projection display as claimed in claim 1 is characterized in that: this projection display equipment more comprises 2 1/4 ripple plates, be respectively the position between this first, second double-colored beam splitter and pairing first, second light valve.
5. dual-light-valve projection display as claimed in claim 1 is characterized in that: this projection display equipment more comprises an optical path compensation plate, and this optical path compensation plate is that the position is between this polar biased light Amici prism and the first double-colored beam splitter.
6. dual-light-valve projection display as claimed in claim 1, it is characterized in that: this first, second double-colored beam splitter is respectively a right-angle prism, with relative this first beam split side and color gauge tap first and second advances plain edge, and advances connected vertically first and second of plain edge with respect to this first, second light valve and with this first and second respectively and go out plain edge, and one be connected in obliquely respectively this first and second advance first and second hypotenuse between the tail end that plain edge and first and second go out plain edge, plating is provided with first and second double-colored spectro film on this first and second hypotenuse.
7. dual-light-valve projection display as claimed in claim 1 is characterized in that: this first, second double-colored beam splitter is respectively a double-colored Amici prism that is formed by two right-angle prisms gummeds.
8. dual-light-valve projection display as claimed in claim 1 is characterized in that: this first, second double-colored beam splitter is respectively a glass plate, and plating is provided with a double-colored spectro film on the wherein side plane of each glass plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01115725 CN1387067A (en) | 2001-05-23 | 2001-05-23 | Dual-light-valve projection display |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01115725 CN1387067A (en) | 2001-05-23 | 2001-05-23 | Dual-light-valve projection display |
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| Publication Number | Publication Date |
|---|---|
| CN1387067A true CN1387067A (en) | 2002-12-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01115725 Pending CN1387067A (en) | 2001-05-23 | 2001-05-23 | Dual-light-valve projection display |
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| CN (1) | CN1387067A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106773097A (en) * | 2016-12-29 | 2017-05-31 | 四川大学 | A kind of light shifter based on LCoS |
| CN114252943A (en) * | 2022-01-26 | 2022-03-29 | 深圳市科金明电子股份有限公司 | Prism unit and projection device using the same |
-
2001
- 2001-05-23 CN CN 01115725 patent/CN1387067A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106773097A (en) * | 2016-12-29 | 2017-05-31 | 四川大学 | A kind of light shifter based on LCoS |
| CN106773097B (en) * | 2016-12-29 | 2019-05-31 | 四川大学 | A kind of light shifter based on LCoS |
| CN114252943A (en) * | 2022-01-26 | 2022-03-29 | 深圳市科金明电子股份有限公司 | Prism unit and projection device using the same |
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