WO2001025838A1 - Projecteur a reflexion a cristaux liquides - Google Patents
Projecteur a reflexion a cristaux liquides Download PDFInfo
- Publication number
- WO2001025838A1 WO2001025838A1 PCT/JP2000/005315 JP0005315W WO0125838A1 WO 2001025838 A1 WO2001025838 A1 WO 2001025838A1 JP 0005315 W JP0005315 W JP 0005315W WO 0125838 A1 WO0125838 A1 WO 0125838A1
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- WO
- WIPO (PCT)
- Prior art keywords
- light
- dichroic mirror
- color
- mirror
- total reflection
- Prior art date
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Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/28—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for polarising
- G02B27/283—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for polarising used for beam splitting or combining
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/12—Picture reproducers
- H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
- H04N9/3102—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM] using two-dimensional electronic spatial light modulators
- H04N9/3105—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM] using two-dimensional electronic spatial light modulators for displaying all colours simultaneously, e.g. by using two or more electronic spatial light modulators
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/74—Projection arrangements for image reproduction, e.g. using eidophor
- H04N5/7416—Projection arrangements for image reproduction, e.g. using eidophor involving the use of a spatial light modulator, e.g. a light valve, controlled by a video signal
- H04N5/7441—Projection arrangements for image reproduction, e.g. using eidophor involving the use of a spatial light modulator, e.g. a light valve, controlled by a video signal the modulator being an array of liquid crystal cells
Definitions
- the present invention provides first, second, and third color light (for example, R, B, and G) displayed on first, second, and third reflection-type liquid crystal panels (for example, reflection-type liquid crystal panels for R, B, and G).
- the present invention relates to a reflective liquid crystal projector that displays a color image by synthesizing an image of light and projecting it on a screen with a projection lens.
- a conventional reflection-type liquid crystal projector was configured as shown in FIG.
- the white light output from the light source 10 is converted into S-polarized light by the polarization conversion element 12, and the S-polarized light is converted by the cross dichroic mirror 14 into R light (red light) and B, G light (blue, The B and G lights are guided to a dichroic mirror 18 by a total reflection mirror 16 and separated into B light and G light by the dichroic mirror 18.
- the separated R light is led to a first polarizing beam splitter (hereinafter simply referred to as a first PBS) 22 by a total reflection mirror 20 and is reflected by the polarizing film to be a reflection type liquid crystal panel (hereinafter simply referred to as an R image display). It irradiates 24 and transmits the reflected light (this reflected light is converted from S-polarized light to P-polarized light) and outputs it.
- a first polarizing beam splitter hereinafter simply referred to as a first PBS 22 by a total reflection mirror 20 and is reflected by the polarizing film to be a reflection type liquid crystal panel (hereinafter simply referred to as an R image display). It irradiates 24 and transmits the reflected light (this reflected light is converted from S-polarized light to P-polarized light) and outputs it.
- B LCD B image display reflective liquid crystal panel
- the G light after separation is reflected by a third polarizing beam splitter (hereinafter simply referred to as a third PBS) 30 polarizing film to form a reflective liquid crystal panel for displaying a G image (hereinafter simply referred to as an LCD for G) 32.
- a third PBS polarizing beam splitter
- LCD for G a reflective liquid crystal panel for displaying a G image
- the cross prism 34 reflects the R and B lights output from the first and second PBSs 22 and 26, and transmits the G light output from the third PBS 30 to combine the R, B and G lights. Then, the combined light was projected on a screen (not shown) by the projection lens 36 to display a color image.
- the conventional reflection type liquid crystal projector shown in FIG. 1 has the following problems.
- the present invention has been made in view of the above-mentioned problems, and can reduce the cost and weight by eliminating the need for expensive cross prisms and reducing the number of required polarization beam splitters. It is intended to provide a reflection type liquid crystal projector. Disclosure of the invention
- the present invention provides first, second, and third color light (for example, R, B, and G light) displayed on first, second, and third reflective liquid crystal panels (for example, LCD for R, B, and G).
- first, second, and third reflective liquid crystal panels for example, LCD for R, B, and G.
- a reflective liquid crystal projector that displays a color image by projecting the image on a screen with a projection lens
- a light source that outputs white light
- the white light output from this light source is S-polarized light or P-polarized light
- a polarization conversion element that converts the polarized light into one of the two polarized lights and outputs the polarized light, and separates the first, second, and third color lights from the polarized light output from the polarization conversion element, and separates the first, second, and third colored light.
- the two color lights (for example, B and G lights) are converted into color lights with different polarization directions and output in the same direction, and the remaining one color light (for example, R light) is converted to two color lights (for example, B and G lights).
- the color separation element outputs in the direction perpendicular to the output direction, and the color separation element outputs in the same direction.
- One of the two color lights (for example, G light) is transmitted and the other (for example, B light) is reflected, and the corresponding one of the first, second, and third reflective liquid crystal panels (for example, G, B) And the reflected light is output
- the first polarized beam splitter and the remaining one color light (for example, R light) output from the color separation element are converted to the corresponding reflective liquid crystal panel (for example, R light) of the first, second, and third reflective liquid crystal panels.
- the second polarization beam splitter that irradiates the LCD and outputs the reflected light, and the first, second, and third color lights output from the first and second polarization beam splitters are combined and output to the projection lens.
- a dichroic prism is used to combine the projection lens.
- white light output from the light source is converted into one of S-polarized light and P-polarized light (for example, s-polarized light) by the polarization conversion element.
- the light is separated into the first, second, and third color lights, and two of the first, second, and third color lights (for example, B and G lights) are converted into color lights having different polarization directions and output in the same direction.
- the remaining one color light (for example, R light) is output in the direction perpendicular to the output direction of the two color lights (for example, B and G light).
- the two color lights (for example, G and B lights) output in the same direction from the color separation element irradiate the corresponding reflective liquid crystal panel (for example, LCDs for G and B) by the first polarization beam splitter, and the reflected light is reflected.
- Light is output to the dichroic prism.
- the remaining one color light (for example, R light) separated by the color separation element irradiates the corresponding reflective liquid crystal panel (for example, LCD for R) by the second polarizing beam splitter, and the reflected light is used as the dichroic prism.
- Output to The dichroic prism combines the first, second, and third color lights output from the first and second polarization beam splitters, and the combined light is projected on a screen via a projection lens to display a color image. You.
- the color separation element is composed of the first and second dichroic mirrors, the first and second total reflection mirrors, and the phase element, and the first dichroic mirror separates the polarization conversion element.
- the first and second color lights of the output polarized light are transmitted, the third color light is reflected, and the first and second color lights transmitted through the first dichroic mirror by the first total reflection mirror are bent 90 °.
- the third color light reflected by the first dichroic mirror by the second total reflection mirror is reflected in the direction bent by 90 °, One of the first and second color lights reflected by the first total reflection mirror by the second dichroic mirror is transmitted and the other is reflected and output, and the third color light reflected by the second total reflection mirror is reflected and output.
- the phase element performs the action described in the following (1) or (2).
- phase element is inserted into the optical path until the third color light reflected by the first dichroic mirror reaches the second dichroic mirror via the second total reflection mirror, and the first dichroic mirror is inserted by this phase element.
- Change the polarization direction of the third color light reflected by the mirror for example, convert S-polarized light to P-polarized light).
- a phase element is inserted into the optical path until the first and second color lights transmitted through the first dichroic mirror reach the second dichroic mirror via the first total reflection mirror. At least one of the polarization directions of the first and second color lights transmitted through the dichroic mirror is converted (for example, S-polarized light is converted to P-polarized light).
- the color separation element is composed of the first, second and third dichroic mirrors, total reflection mirror and phase element, and output from the polarization conversion element by the first dichroic mirror. The first and second color lights transmitted through the first dichroic mirror are transmitted through the first dichroic mirror while the other light is reflected by the third dichroic mirror.
- the third color light reflected by the first dichroic mirror is reflected by the total reflection mirror in a direction bent by 90 °, the color light reflected by the third dichroic mirror is transmitted by the second dichroic mirror, and the total reflection is performed.
- the third color light reflected by the mirror is reflected and output in the same direction, and the phase element performs the action described in the following (1), (2) or (3).
- phase element is inserted into the optical path until the third color light reflected by the first dichroic mirror reaches the second dichroic mirror via the second total reflection mirror, and the first dichroic mirror is inserted by this phase element.
- Change the polarization direction of the third color light reflected by the mirror for example, convert S-polarized light to P-polarized light).
- phase element is inserted in the optical path until the first and second color lights transmitted through the first dichroic mirror reach the third dichroic mirror, and the first and second light transmitted through the first dichroic mirror by this phase element. Convert at least one polarization direction of dichroic light (for example, convert S-polarized light to P-polarized light).
- phase element is inserted in the optical path until the color light reflected by the third dichroic mirror reaches the second dichroic mirror, and the phase element converts the polarization direction of the color light reflected by the third dichroic mirror (for example, Converts S-polarized light to P-polarized light).
- the first and second polarization beam splitters are formed by the first and second polarization beam splitter prisms. That is, the incident and exit angles of the light that enters and exits the first and second polarization beam splitters are made vertical, thereby eliminating aberrations that occur when the incident and exit angles are not perpendicular.
- the first and second polarizing beam splitter prisms and the dichroic prism are formed by a prism block in which these are integrated in order to reduce the required number of parts and facilitate assembly. That is, the first and second polarizing beam splitter prisms and dichroic prism are formed by an integrated prism block, so that the number of components can be reduced and assembly can be facilitated.
- the phase element is a one-to-two wavelength plate that is arranged perpendicular to the color light incident on the plate surface.
- the phase element is used to reduce the color light incident on the reflecting surface.
- a 14-wavelength film fixed to the reflection surface of the total reflection mirror.
- an optical path length can be shortened by eliminating the need for a space for independently providing a phase element.
- FIG. 1 is a configuration diagram showing a conventional example.
- FIG. 2 is a configuration diagram showing a first embodiment of the reflection type liquid crystal projector according to the present invention.
- FIG. 3 is a configuration diagram showing a second embodiment of the reflection type liquid crystal projector according to the present invention. is there.
- FIG. 4 is a configuration diagram showing a third embodiment of the reflective liquid crystal projector according to the present invention.
- FIG. 5 is a configuration diagram showing a fourth embodiment of the reflective liquid crystal projector according to the present invention.
- FIG. 6 is a configuration diagram showing another embodiment of the phase element. BEST MODE FOR CARRYING OUT THE INVENTION
- FIG. 2 shows an embodiment of the reflection type liquid crystal projector according to the present invention, and the same parts as those in FIG. 1 are denoted by the same reference numerals, and the description is omitted or simplified.
- reference numeral 10 denotes a light source
- reference numeral 12 denotes a polarization conversion element
- reference numerals 24, 28, and 32 denote red, blue, and green lights as an example of the first, second, and third reflective liquid crystal panels.
- a reflection type liquid crystal panel (hereinafter simply referred to as R, B, G LCD) 36 is a projection lens.
- the light source 10 outputs white light
- the polarization conversion element 12 converts the white light output from the light source 10 into S-polarized light and outputs the same
- the R, B, and G LCDs 24 Reference numerals 28 and 32 denote red, blue, and green lights (hereinafter simply referred to as R, B, and G lights) as examples of first, second, and third color lights according to video signals from a display control circuit (not shown). ) Display the image of.
- Reference numeral 40 denotes a color separation element (also referred to as a color separation element).
- the color separation element 40 includes first and second dichroic mirrors 42, 44, and a 12-wave plate 46 and first and second dichroic mirrors. It consists of 48, 50 total reflection mirrors.
- the half-wave plate 46 is an example of a phase element.
- the first dichroic mirror 42 transmits R and B light and reflects G light with respect to the S-polarized light output from the polarization conversion element 12.
- the 1Z2 wavelength plate 46 converts the G light reflected by the first dichroic mirror 42 from S-polarized light to P-polarized light and outputs the converted light.
- the first total reflection mirror 48 reflects the R and B lights transmitted through the first dichroic mirror 42 in a direction bent by 90 °.
- the second total reflection mirror 50 reflects the G light output from the half-wave plate 46 in a direction bent by 90 °.
- the second dichroic mirror 44 reflects the R light reflected by the first total reflection mirror 48, transmits the B light reflected by the first total reflection mirror 48, and further reflects the second total reflection.
- the G light reflected by the mirror 50 is reflected.
- Reference numerals 52 and 54 denote first and second polarization beam splitter prisms (hereinafter simply referred to as first and second PBSs) as examples of the first and second polarization beam splitters, and 56 denotes a Die-Croitsk prism.
- the first PBS 52 reflects the B light transmitted through the second dichroic mirror 44 to irradiate the B LCD 28 with the reflected light (P modulation by modulation of the B LCD 28).
- the G light reflected by the second dichroic mirror 44 is transmitted to irradiate the G LCD 32 with the reflected light (L for G).
- the light is converted to S-polarized light by the modulation of CD 32.) is reflected and output.
- the second PBS 54 reflects the R light reflected by the second dichroic mirror 44 to irradiate the R LCD 24 with the reflected light (P-polarized light by modulation of the R LCD 24 for R). It is transmitted through and output.
- the dichroic prism 56 combines the B and G light output from the first PBS 52 and the R light output from the second PBS 54 and outputs the combined light to the projection lens 36.
- White light output from the light source 10 is converted into S-polarized light by the polarization conversion element 12 and separated into R, B and G lights by the first dichroic mirror 42.
- the separated R and B lights are guided by the first total reflection mirror 48 and enter the second dichroic mirror 44.
- the separated G light is converted into P-polarized light by the one- and two-wavelength plates 46, guided by the second total reflection mirror 50, and made incident on the second dichroic mirror 44.
- the incident B light passes through the second dichroic mirror 44 and enters the first PBS 52, and the incident G light is reflected by the second dichroic mirror 44 and enters the first PBS 52. To enter.
- the incident R light is reflected by the second dichroic mirror 44 and input to the second PBS 54.
- the B light input to the first PBS 52 is reflected by the polarizing film and is incident on the LCD 28 for B, and the reflected light is transmitted through the polarizing film and output. At this time, the reflected light from the B LCD 28 is changed to P-polarized light by the modulation of the B LCD 28.
- the G light input to the first PBS 52 passes through the polarizing film and is input to the G LCD 32, and the reflected light is reflected by the polarizing film and output. At this time, the reflected light from the LCD 32 for G is changed to S-polarized light by the modulation of the LCD 32 for G.
- the R light input to the second PBS 54 is reflected by the polarizing film, enters the L-CD 24 for R, and the reflected light is transmitted through the polarizing film and output. At this time, the reflected light from the R LCD 24 is changed to P-polarized light by the modulation of the R LCD 24.
- the present invention is not limited to this.
- the present invention can also be used when the splitter prism and the dike aperture prism are configured as a prism block in which these are integrated.
- the present invention is also used when a prism block 60 is provided in place of the first and second PBSs 52, 54 and the dichroic prism 56 in FIG. can do.
- the required number of parts can be reduced to facilitate assembly.
- the color separation element in order to simplify the configuration of the color separation element, the case where the color separation element is configured by the first and second dichroic mirrors, the phase element, and the first and second total reflection mirrors has been described.
- the color separation element separates R, B, and G light from polarized light (eg, S-polarized light) output from the polarization conversion element, and separates G light into one.
- polarized light eg, S-polarized light
- the color separation element 40a is connected to the first, second, and third dike opening mirrors 42, 44a, 62, and 1 two-wave plate 46 and the total reflection mirror 50. It can also be used when configured with.
- the first dichroic mirror 42 transmits the R and B lights and reflects the G light for the S-polarized light output from the polarization conversion element 12.
- the 12-wavelength plate 46 converts the G light reflected by the first dichroic mirror 42 from S-polarized light to P-polarized light and outputs it.
- the third dichroic mirror 62 transmits the R light out of the R and B light transmitted through the first dichroic mirror 42 and reflects the B light.
- the second dichroic mirror 44a transmits the B light reflected by the third dichroic mirror 62 and reflects the G light output from the 12-wave plate 46 and projected by the total reflection mirror 50. I do.
- FIG. 4 the distance between the third dichroic mirror 62 and the first PBS 52, the distance between the first PBS 52 and the dichroic prism 56, and the second PBS 54 and the dichroic prism 56 are shown.
- the distance between R, B, and G LCDs 24, 28, and 32 modulated the R, B, and G light modulated by each of the R, B, and G
- the optical path lengths from the light reflected from the CDs 24, 28, 32 to the dichroic prism 56 for color synthesis are made equal.
- the polarization conversion element is configured to convert white light output from the light source into S-polarized light
- the present invention is not limited to this.
- the present invention can also be applied to a case where the polarization conversion element is configured to convert white light output from a light source into P-polarized light.
- a polarization conversion element 12 that converts white light output from the light source 10 into P-polarized light and outputs the P-polarized light.
- the color separation element 40 b is added to the color separation element 4 O a in FIG. Configuration.
- a right angle mirror 70 is a total reflection mirror 72, 74 arranged at an angle of 90 °, and a relay lens 76, 74 arranged on the incident side of the total reflection mirror 72, 74. And 8 which reflect incident light as parallel and oppositely directed light.
- the white light output from the light source 10 is converted into P-polarized light by the polarization conversion element 12a, and is separated into R, B and G lights by the first dichroic mirror 42.
- the R and B lights separated by the first dichroic mirror 42 are separated into R light and B light by the third dichroic mirror 62.
- the R light separated by the third dichroic mirror 62 is converted into parallel and opposite light by a relay lens 76, a total reflection mirror 72, a relay lens 78 and a total reflection mirror 74. 1 Fill in PBS 52.
- the distance between the R light to reach the LCD 24 for R is longer than the distance to B for the LCD 24, and the distance for the G light is longer than the distance to reach the LCDs 28 and 32 for B and G.
- the B light separated by the third dichroic mirror 62 passes through the second dichroic mirror 44a and enters the second PBS.
- the G light separated by the first dichroic mirror 42 is converted to S-polarized light by a 12-wavelength plate 46, reflected by a total reflection mirror 50, and input to a second dichroic mirror 44a. Then, the light is reflected by the second dichroic mirror 44a and input to the second PBS.
- the B light input to the first PBS 52 is transmitted through the polarizing film and is incident on the LCD 28 for B, and the reflected light is reflected by the polarizing film and output. At this time, the reflected light from the LCD 28 for B is changed to S-polarized light by the modulation of the LCD 28 for B.
- the G light input to the first PBS 52 is reflected by the polarizing film and input to the LCD 32 for G, and the reflected light passes through the polarizing film and is output. At this time, the reflected light from the LCD 32 for G is changed to P-polarized light by the modulation of the LCD 32 for G.
- the R light input to the second PBS 54 passes through the polarizing film and enters the R LCD 24.
- the reflected light is reflected by the polarizing film and output.
- the reflected light from the R LCD 24 for R has been changed to S-polarized light by the modulation of the L CD 24 for R.
- the phase element is a one-to-two wavelength plate in order to simplify the configuration of the phase element.
- the present invention is not limited to this, and the G light reflected by the first dichroic mirror May be converted from S-polarized light (or P-polarized light) to P-polarized light (or S-polarized light) and output.
- a glass plate 80 whose plate surface is arranged at 45 ° with respect to the incident direction of G light, and a total reflection film 8 on the G light incident surface of the glass plate 80
- the present invention can also be applied to a case where the phase element 46a is constituted by the quarter-wave film 84 adhered through the layer 2.
- the glass plate 80 and the total reflection film 82 constitute a total reflection mirror, and correspond to the total reflection mirror 50 in FIGS. 2 to 5.
- the G light reflected by the first dichroic mirror 42 is first converted from S-polarized light (or P-polarized light) into circularly-polarized light by passing through a 14-wavelength film 84, and then is converted into a circularly-polarized light.
- the light is converted from circularly polarized light into P-polarized light (or S-polarized light) by being reflected by the reflective film 82 and passing through the quarter-wave film 84, and the second dike opening mirror 44 (or 44a) (FIG. 6) Is omitted).
- the reflecting surface of a total reflection mirror (a total reflection mirror composed of a glass plate 80 and a total reflection film 82) corresponding to the total reflection mirror 50 of FIGS. Since the phase element is formed by fixing the Z4 wavelength film 84, a device (holding tool) for holding the 12-wavelength plate 46 shown in FIGS. The weight can be reduced, and the optical path length can be shortened by eliminating the space for providing the 12-wavelength plate 46.
- the two-polarized beam splitter is composed of a polarized beam-split prism with a polarizing film fixed between the junction slopes of two right-angle prisms, and enters the first and second polarized beam splitters.
- the incident and exit angles of the emitted light are vertical has been described, the present invention is not limited to this. It can also be used in the case of an evening plate.
- phase element 46 is inserted between the first dichroic mirror 42 and the total reflection mirror 150
- present invention is not limited to this.
- phase element 46 when the phase element 46 is inserted between the total reflection mirror 50 and the second dichroic mirror 44, the phase element 46 is connected to the first dich-opening mirror. It can also be used when inserted between 42 and the total reflection mirror 48, or when the phase element 46 is inserted between the total reflection mirror 48 and the second dichroic mirror 44. .
- the total reflection mirror 48 is replaced with the one shown in FIG. It can also be used for the case where the phase element 46a is replaced.
- phase element 46 when the phase element 46 is inserted between the total reflection mirror 50 and the second dichroic mirror 44a, the phase element 46 is connected to the first dich port.
- the phase mirror 46 is inserted between the third dichroic mirror 62 and the third dichroic mirror 62, or when the phase element 46 is inserted between the third dichroic mirror 62 and the second dichroic mirror 44a. Can also be used.
- a dichroic mirror (for example, 42 and 44 in FIG. 2 or FIG. 3) is used as a component for separating the first, second, and third color lights in a predetermined direction in the color separation element.
- a dichroic mirror for example, 42 and 44 in FIG. 2 or FIG. 3
- the present invention is not limited to this, and the first, second
- the present invention can be applied to a case where a prism is used instead of a dichroic mirror as a component for separating the third color light in a predetermined direction.
- the present invention is not limited to this, and light of other different three colors may be used. Or a color in which the order of red, blue, and green lights is different.
- the first color light is blue light
- the second color light is green light
- the third color light is red light.
- the present invention can also be used for Industrial applicability
- the reflection type liquid crystal projector according to the present invention can reduce the number of polarization beam splitters conventionally required to three, and does not require the use of an expensive cross prism as a color combining element. It can be used for reduction and weight reduction. Further, by forming the polarizing beam splitter with a polarizing beam splitter prism, it is possible to make the incidence and emission angles of light entering and exiting the polarizing beam splitter vertical and eliminate aberration. Further, by forming the first and second polarizing beam splitters and the dichroic prism with an integrated prism block, the number of parts can be reduced and the assembly can be facilitated.
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/856,001 US6628346B1 (en) | 1999-09-30 | 2000-08-08 | Reflection type liquid crystal projector |
EP00950048A EP1146383A4 (en) | 1999-09-30 | 2000-08-08 | REFLECTIVE PROJECTOR WITH LIQUID CRYSTALS |
CA002352434A CA2352434A1 (en) | 1999-09-30 | 2000-08-08 | Reflection type liquid crystal projector |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11/280862 | 1999-09-30 | ||
JP28086299A JP2001100155A (ja) | 1999-09-30 | 1999-09-30 | 反射型液晶プロジェクタ |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2001025838A1 true WO2001025838A1 (fr) | 2001-04-12 |
Family
ID=17631011
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2000/005315 WO2001025838A1 (fr) | 1999-09-30 | 2000-08-08 | Projecteur a reflexion a cristaux liquides |
Country Status (5)
Country | Link |
---|---|
US (1) | US6628346B1 (ja) |
EP (1) | EP1146383A4 (ja) |
JP (1) | JP2001100155A (ja) |
CA (1) | CA2352434A1 (ja) |
WO (1) | WO2001025838A1 (ja) |
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US7281804B2 (en) | 2004-12-16 | 2007-10-16 | Hewlett-Packard Development Company, L.P. | Prism assembly for separating light |
DE102005019839B4 (de) * | 2005-04-28 | 2009-04-09 | Cinetron Technology Inc. | Flüssigkristall-Projektionssystem |
US7445341B2 (en) * | 2005-09-21 | 2008-11-04 | 3M Innovative Properties Company | Four panel liquid crystal display system |
TWI316612B (en) * | 2006-10-20 | 2009-11-01 | Chunghwa Picture Tubes Ltd | Light beam splitting and combining system and processing method |
US20090102939A1 (en) * | 2007-10-18 | 2009-04-23 | Narendra Ahuja | Apparatus and method for simultaneously acquiring multiple images with a given camera |
JP6237627B2 (ja) * | 2012-08-02 | 2017-11-29 | 日本電気株式会社 | 投射型表示装置及び投射光発生方法 |
WO2014020895A1 (ja) * | 2012-08-02 | 2014-02-06 | 日本電気株式会社 | 投射型表示装置及び投射光発生方法 |
CN109188700B (zh) * | 2018-10-30 | 2021-05-11 | 京东方科技集团股份有限公司 | 光学显示系统及ar/vr显示装置 |
CN113741130A (zh) * | 2020-05-29 | 2021-12-03 | 苏州佳世达光电有限公司 | 激光投影机 |
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JPH11271893A (ja) * | 1998-03-25 | 1999-10-08 | Minolta Co Ltd | 投影表示装置 |
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US5267029A (en) * | 1989-12-28 | 1993-11-30 | Katsumi Kurematsu | Image projector |
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JP3622500B2 (ja) * | 1998-05-20 | 2005-02-23 | 株式会社富士通ゼネラル | 液晶プロジェクタ装置 |
TW460730B (en) * | 1998-11-13 | 2001-10-21 | Ind Tech Res Inst | Dual board Liquid crystal projection display |
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1999
- 1999-09-30 JP JP28086299A patent/JP2001100155A/ja active Pending
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2000
- 2000-08-08 CA CA002352434A patent/CA2352434A1/en not_active Abandoned
- 2000-08-08 US US09/856,001 patent/US6628346B1/en not_active Expired - Fee Related
- 2000-08-08 EP EP00950048A patent/EP1146383A4/en not_active Withdrawn
- 2000-08-08 WO PCT/JP2000/005315 patent/WO2001025838A1/ja not_active Application Discontinuation
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JPH11142792A (ja) * | 1997-11-10 | 1999-05-28 | Nikon Corp | 偏光装置および投射型表示装置 |
JPH11271893A (ja) * | 1998-03-25 | 1999-10-08 | Minolta Co Ltd | 投影表示装置 |
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Title |
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Also Published As
Publication number | Publication date |
---|---|
EP1146383A1 (en) | 2001-10-17 |
JP2001100155A (ja) | 2001-04-13 |
CA2352434A1 (en) | 2001-04-12 |
EP1146383A4 (en) | 2006-05-03 |
US6628346B1 (en) | 2003-09-30 |
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