WO2003007073A1 - Projecteur a cristaux liquides du type a reflexion - Google Patents
Projecteur a cristaux liquides du type a reflexion Download PDFInfo
- Publication number
- WO2003007073A1 WO2003007073A1 PCT/JP2002/007162 JP0207162W WO03007073A1 WO 2003007073 A1 WO2003007073 A1 WO 2003007073A1 JP 0207162 W JP0207162 W JP 0207162W WO 03007073 A1 WO03007073 A1 WO 03007073A1
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- wavelength component
- light
- illumination light
- liquid crystal
- reflected
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Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
-
- 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
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/005—Projectors using an electronic spatial light modulator but not peculiar thereto
- G03B21/006—Projectors using an electronic spatial light modulator but not peculiar thereto using LCD's
Definitions
- the present invention separates white illumination light having a uniform polarization plane into three colors, reflects the illumination light of each wavelength component to a reflection type liquid crystal display element, and obtains image light by the R, G, and B wavelength components.
- the present invention relates to a reflection type liquid crystal projector that combines and emits these wavelength component image lights.
- the optical system in the reflective liquid crystal projector includes a color separation optical system that separates the illumination light from the white light source into three colors of R, G, and B, and reflects the illumination light of each of the R, G, and B wavelength components.
- the liquid crystal display includes three reflective liquid crystal display elements that generate image light of each wavelength component, and a color combining optical system that combines image light reflected from each of the liquid crystal display elements.
- An optical element such as a dichroic mirror or a polarizing beam splitter is used as the color separation optical system, and an optical element such as a polarizing beam splitter / dichroic prism is used as the color combining optical system.
- Various types of optical systems have been proposed in the past, for example, Japanese Patent Application Laid-Open No. 2000-1990, Japanese Patent Application Laid-Open No. 2001-100055. And Japanese Patent Application Laid-Open No. 11-326866-1.
- a polarizing beam splitter is used.
- a polarizing beam splitter and a dichroic prism are used to combine the image light of each wavelength component of R, G, and B reflected by the three reflective liquid crystal display elements (by the way, the polarizing beam splitter).
- a splitter-dichroic prism is generally an optical element suitable for transmitting p-polarized light and reflecting s-polarized light, but reflecting p-polarized light and transmitting s-polarized light.
- a polarizing beam splitter and a dichroic aperture prism are formed of a multilayer film, but an optical element that reflects p-polarized light and transmits s-polarized light is Compared to a device that transmits p-polarized light and reflects s-polarized light, the number of layers is required to be twice or more, and it becomes extremely expensive as an optical element.
- Constitution Is designed to reflect p-polarized light and transmit s-polarized light with some polarizing beam splitters and dichroic prisms, which makes the entire optical system extremely expensive. .
- the reflection type liquid crystal projector disclosed in Japanese Patent Application Laid-Open No. H11-3268661 uses illumination light in the form of s-polarized light, and first uses a dichroic mirror to emit green wavelength component illumination light. Is separated from the blue and red wavelength component illumination light, and the blue and red wavelength component illumination light is passed through a one-to-two phase difference plate so that the red wavelength component illumination light becomes p-polarized light. The plane of polarization is rotated 90 °. The s-polarized light, which remains green, is reflected by a single polarizing beam splitter and is incident on a liquid crystal display device.
- the red wavelength component illumination light of the p-polarized light and the blue wavelength component illumination light of the s-polarized light are separated by another polarizing beam splitter.
- the red wavelength component light of the p-polarized light is transmitted through the polarization plane, and the blue wavelength component light, which is the s-polarized light, is reflected by the polarization plane and is incident on the liquid crystal display element. Therefore, two polarization beams are used.
- the splitter always reflects s-polarized light and transmits p-polarized light.
- dichroic prism is used to finally combine three colors of image light.
- the green wavelength component image light that is p-polarized light is transmitted, and the red wavelength component image light that is s-polarized light and the blue wavelength component image light that is p-polarized light are reflected.
- the dichroic prism generally cannot suppress the occurrence of variation in transmission characteristics depending on the incident angle.
- a reflection type liquid crystal projector is provided with a condenser lens in the light source part, so that the light flux of the light entering the dichroic prism is narrowed and enters with a certain angle range. become.
- the green wavelength component image light is transmitted as p-polarized light and the red wavelength component image light is reflected as p-polarized light in the dichroic bristles, either The transmittance of the color image light is greatly reduced depending on the incident angle, and the output efficiency of the emitted light is reduced.
- the present invention has been made in view of the above points, and an object of the present invention is to provide an optical system that constitutes a reflection-type liquid crystal projector with a simple optical configuration and high-quality, bright image output. Is to get it.
- the present invention provides The white illumination light having a uniform light direction is divided into first, second, and third wavelength component illumination light, and the light is reflected by a reflection-type liquid crystal display element, and the first, second, and third wavelengths are reflected.
- a reflection type liquid crystal projector that combines and emits each wavelength component image light, wherein the first wavelength component illumination light of the white illumination light is second and third components.
- a dichroic mirror for separating from the first wavelength component illumination light, and a first wavelength component image by transmitting or reflecting the first wavelength component illumination light and reflecting it on the first liquid crystal display element.
- a first polarization beam splitter having a polarization plane for reflecting or transmitting the first wavelength component image light; and one of the second and third wavelength component illumination lights. Transmit the component illumination light after converting the polarization plane by 90 °
- the other wavelength component illumination light is transmitted without converting the polarization plane, and the second wavelength component illumination light of the transmitted light from the 1Z2 phase difference plate is reflected or reflected.
- the second wavelength component image light is transmitted and reflected by the second liquid crystal display element to form a second wavelength component image light.
- the second wavelength component image light is transmitted or reflected, and the third wavelength component illumination light is transmitted. Is transmitted or reflected, and reflected by the third liquid crystal display element, thereby forming a third wavelength component image light.
- the second wavelength component having a polarization plane for reflecting or transmitting the third wavelength component image light.
- the polarization plane of the Msplitter reflects s-polarized light
- the dichroic prism transmits the second wavelength component image light as the P-polarized light, and the first and second wavelength component image lights. Is characterized by being s-polarized light.
- the reflection type liquid crystal projector of the present invention basically includes a dichroic mirror, two polarizing beam splitters, a one-to-two retardation plate, It is composed of a micro prism.
- the first, second, and third wavelength components are, for example, if the first wavelength component is a blue wavelength component, the second wavelength component is a green wavelength component, and the third wavelength component is a red wavelength component. If the first wavelength component is a red wavelength component, the second wavelength component is a green wavelength component and the third wavelength component is a blue wavelength component, that is, the first wavelength component is the first wavelength component in order from the short wavelength side or the long wavelength side. , And the second and third wavelength components.
- the dichroic mirror separates the white illumination light into a first wavelength component and second and third wavelength components.
- the wavelength component reflected by the second polarization beam splitter is s-polarized light
- the wavelength component transmitted through the second polarization beam splitter is p-polarized light.
- the dichroic prisms having the property of reflecting the s-polarized light of the blue wavelength component, or use a material having the property of reflecting the s-polarized light of the red wavelength component c in this case reflects the blue In this case, if the red wavelength component to be reflected is s-polarized light, approximately 100% is transmitted. When red is reflected, s-polarized light may be used to transmit approximately 100% of the blue wavelength component.
- the transmittance will be 100% or a value close to it.
- the transmittance greatly changes depending on the angle of the incident light. Therefore, in the dichroic prism, the image light of the green wavelength component, which is the second wavelength component image light, becomes p-polarized light when exiting from the second polarizing beam splitter, and passes through the dichroic prism. Let it do.
- the blue wavelength component and the red wavelength component are both s-polarized light, and one of them is reflected and the other is transmitted. As a result, even if the incident angle increases, Since a decrease in transmission (and reflection) efficiency can be prevented, a bright lens with a small ⁇ ⁇ ⁇ value can be used as a condenser lens.
- the illumination light may be ⁇ -polarized light or S-polarized light as long as the polarization planes are aligned.
- the first wavelength component image light is reflected by S-polarized light, and for this purpose, it is desirable that the illumination light be aligned with ⁇ -polarized light.
- a 1 ⁇ 2 phase difference plate is arranged in front of the first polarizing beam splitter, and the polarization plane is rotated 90 ° so that the light becomes ⁇ -polarized light. Just do it.
- the 1 ⁇ 2 retardation plate can be formed by forming a film on an independent parallel plane plate, it is preferable to form the film on the incident surface of the second polarizing beam splitter. Is desirable.
- the first and second polarizing beam splitters and the dichroic prism can be configured as separate optical elements, respectively, but they are integrated to form the first and second polarizing beam splitters. It is also possible not to provide a boundary surface in the optical path of the incident light from the data to the dichroic brake.
- FIG. 1 is a configuration explanatory view of a reflective liquid crystal projector showing a first embodiment of the present invention
- Figure 2 is a light transmission characteristic diagram of a dichroic mirror
- Figure 3 is a light transmission characteristic diagram of a polarizing beam splitter.
- Fig. 4 is a diagram showing the rotation transmission characteristics of light of the 12 phase difference plate
- Figure 5 is a light transmission characteristic diagram of dichroic brhythm
- Fig. 6 is an angle characteristic diagram when s-polarized light enters the dichroic prism suitable for reflecting the blue wavelength component.
- Fig. 7 is an angle characteristic diagram when P-polarized light is incident on a dichroic prism suitable for reflecting blue wavelength components.
- Fig. 8 is an output characteristic diagram of each image light in the dichroic prism.
- Fig. 9 is a diagram showing a modification of the optical configuration of Fig. 1,
- FIG. 10 is a view showing the integrated optical glass of FIG. 9 separated
- FIG. 11 is a configuration explanatory view of a reflective liquid crystal projector showing a second embodiment of the present invention.
- FIG. 12 is a structural explanatory view of a reflective liquid crystal projector showing a third embodiment of the present invention.
- FIG. 13 is a structural explanatory view of a reflective liquid crystal projector showing a fourth embodiment of the present invention.
- FIG. 14 is a structural explanatory view of a reflective liquid crystal projector showing a fifth embodiment of the present invention.
- FIG. 15 is a structural explanatory view of a reflective liquid crystal projector showing a sixth embodiment of the present invention.
- Figure 16 shows the angle characteristic diagram when s-polarized light is incident on the dichroic prism suitable for reflecting the red wavelength component.
- Fig. 17 is an angle characteristic diagram when p-polarized light is incident on dichroic prism suitable for reflecting the red wavelength component.
- FIG. 1 shows an embodiment of the present invention.
- 1 is a white light source
- 2 is a polarization conversion means, and these constitute a light source section.
- the polarization conversion means 2 is for adjusting the polarization plane of the illumination light from the white light source 1.
- the illumination light is adjusted to p-polarized light by the polarization conversion means 2.
- Reference numeral 3 denotes a dichroic mirror, and illumination light is first incident on the dichroic mirror 3.
- the dichroic mirror 3 converts blue wavelength component illumination light (hereinafter, referred to as B illumination light) as the first wavelength component illumination light into green wavelength component illumination light (hereinafter, referred to as G illumination light) as the second wavelength component illumination light. It is used to separate the illumination light from the red wavelength component illumination light (hereinafter referred to as R illumination light) as the third wavelength component illumination. That is, the dichroic mirror 3 transmits B illumination light and reflects G illumination light and R illumination light.
- B illumination light blue wavelength component illumination light
- Reference numeral 4 denotes a first polarizing beam splitter (hereinafter, referred to as a first PBS).
- the B illumination light transmitted through the dichroic mirror 3 is p-polarized light, and the B illumination light is a polarization plane of the first PBS 4. 4 Transmit through a.
- a reflection type liquid crystal display element (hereinafter, referred to as B-LCD) 7B for forming image light for blue is provided in the transmission light path of the first PBS4. Therefore, the B illumination light is reflected by the B-LCD 7 B, and blue wavelength component image light (hereinafter, referred to as B image light) is obtained.
- This B image light becomes s-polarized light by being reflected by B-LCD 7 B. Then, the B image light is reflected by the polarization plane 4a of the first PBS 4, and the optical path is bent 90 °.
- Reference numeral 5 denotes a 1Z2 phase difference plate (hereinafter, simply referred to as a phase difference plate).
- the phase difference plate 5 is a polarized light of the G illumination light out of the G illumination light and the R illumination light reflected by the dichroic mirror 3.
- the wavefront is rotated 90 ° and transmitted as s-polarized light, and the polarization plane of the R illumination light is not rotated and is transmitted as p-polarized light.
- Reference numeral 6 denotes a second polarizing beam splitter (hereinafter, referred to as a second PBS), which is one of the G illumination light, which is s-polarized light, and the R illumination light, which is p-polarized light, transmitted through the retardation plate 5.
- a second PBS second polarizing beam splitter
- the G illumination light is reflected and the R illumination light is transmitted.
- the G illumination light and the R illumination light are separated.
- a reflective liquid crystal display element for green G-LCD 7G is arranged, and G illumination light is reflected by this G-LCD 7G, and green wavelength component image light (hereinafter referred to as G image light) is obtained.
- the G illumination light is s-polarized light
- the G image light reflected on the G—LCD 7G becomes p-polarized light.
- the R illumination light is p-polarized light, and is reflected by a red reflective liquid crystal display element (hereinafter, referred to as R-LCD) 7 R facing the optical path passing through the polarization plane 6 a of the second PBS 6.
- red wavelength component image light hereinafter, referred to as R image light
- the R illumination light is P-polarized light
- the R image light reflected by the R—LCD 7 R becomes s-polarized light.
- the G image light passes through the polarization plane 6a of the second PBS 6, and the R image light is reflected by the polarization plane 6a of the second PBS 6, whereby the G image light and the R image Light and light are combined.
- the dichroic prism 8 combines the B image light reflected by the polarization plane 4a of the first PBS 4 and the G image light and the R image light combined by the second PBS 6 and outputs the combined light. Is what you do.
- the characteristics of the dichroic film 8a in the dichroic prism 8 are such that it reflects B image light and transmits G image light and R image light. As a result, image lights of three colors R, G, and B are combined and output.
- Figure 2 shows the wavelength transmission characteristics of Dichroic Mira 13.
- the dichroic mirror 3 has a wavelength of approximately 50 O nm and almost completely transmits wavelengths below the boundary, and wavelength components above 500 nm are almost totally reflected. It has characteristics.
- the B illumination light on the short wavelength side can be separated from the R illumination light on the intermediate wavelength and the R illumination light on the long wavelength side.
- the p-polarized light shown by the solid line is almost totally transmitted, and the s-polarized light shown by the dotted line is almost totally reflected.
- the phase difference plate 5 Fig. 4 shows the rotational transmission characteristics of G illumination light.
- the rotational transmittance is almost 100%, and p incident on the phase difference plate 5 Almost 100% of G illumination light, which is polarized light, is converted into s-polarized light and transmitted.
- the R illumination light in the longer wavelength region that is, the longer wavelength side, is transmitted without rotating the plane of polarization.
- the band for rotating the plane of polarization is narrowed, but the point is that G illumination light is changed to s-polarized light, and R illumination light is transmitted as p-polarized light. Just do it.
- the dichroic prism 8 receives B image light that is s-polarized light, G image light that is p-polarized light, and R image light that is s-polarized light.
- the B image light is reflected by the dichroic film 8a, and the G image light and the R image light pass through the dichroic film 8a. Therefore, the dichroic prism 8 having the transmission characteristics shown in FIG. 5 is used.
- the solid line indicates the transmission characteristic of p-polarized light
- the dotted line indicates the transmission characteristic of s-polarized light.
- s-polarized light is virtually totally reflected up to about 500 nm, and wavelengths longer than that are almost completely transmitted.
- the blue reflection type dichroic prism 8 having such characteristics, the s-polarized light B image light is substantially totally reflected at the dich-mouthed icbrhythm 8 and the p-polarized light G image light and the like.
- R image light which is ⁇ s-polarized light, is transmitted substantially entirely.
- the light source unit is provided with a condenser lens, so that the luminous flux of the illuminating light is converged at a certain part and spreads at a certain part. Therefore, the light emitted from the light source has a certain angle range.
- the angle range will be larger, for example having an angle of approximately ⁇ 15 °.
- a dichroic film changes its transmission characteristics and reflection characteristics according to the incident angle.
- the dichroic prism 8 reflects the B image light, which is s-polarized light, and transmits the G image light of p-polarized light and the R image light of s-polarized light.
- the Roytz prism 8 a prism suitable for reflecting on the short wavelength side is used.
- the angular characteristics of this type of dichroic prism 8 are shown in FIGS. Fig. 6 shows the angular characteristics of s-polarized light
- Fig. 7 shows the angular characteristics of p-polarized light.
- the solid lines show the transmission characteristics at an incident angle of 0 °
- the dotted lines show the transmission characteristics at an incident angle of + 15 °
- the one-dot chain line shows 115.
- the dichroic prism 8 reflects the B image light that is s-polarized light, and transmits the G image light that is P-polarized light and the R image light that is s-polarized light. Therefore, it is possible to completely eliminate the factor of the decrease in transmittance due to the incident angle, and even if a bright condensing lens with a small f-number is used, as shown in Fig. 8, the three colors are synthesized by the dichroic prism 8. The resulting image light has extremely high efficiency output characteristics.
- the optical configuration in Fig. 1 consists of a dichroic mirror 3 It is composed of a small number of optical elements such as a difference plate 5, two polarization beam splitters 4 and 6, and a dichroic prism 8, so that the configuration is simplified and the distance between each optical element is reduced. There are advantages such as easy optical axis alignment.
- the polarizing beam splitters 4 and 6 both reflect s-polarized light and transmit p-polarized light, the film configuration of their polarization planes becomes simple and can be manufactured at low cost.
- the dichroic prism 8 for synthesizing the three colors of image light has the advantage that the transmittance does not decrease due to the incident angle.
- the 1Z2 retardation plate 5 can be configured as an optical element separate from the polarization beam splitter 6, but as shown, a film is formed on the incident surface of the polarization beam splitter 6. It is desirable to form them integrally by doing Further, as shown in FIGS. 9 and 10, the first and second PBSs 4 and 6 and the dichroic prism 8 can be formed as a single unit. That is, as shown in FIG. 10, these optical elements are configured to be unitized by joining four optical glasses G1 to G4, and a required surface of these is formed. Form a film. As a result, it is possible to eliminate a boundary surface between the exit surfaces of the first and second PBSs 4 and 6 and the entrance surface of the dichroic prism 8. With such a configuration, there is an advantage that there is no need to align the optical axes of the three optical elements, and it is not necessary to form an antireflection film or the like on the boundary surface.
- the optical system for a reflective liquid crystal projector of the present invention can employ various configurations other than the configuration shown in FIG. Some examples are shown in FIGS. 11 to 15.
- the direction of irradiation of the illumination light from the light source unit is different from that of FIG.
- the dichroic mirror 13 is used to reflect the B illumination light, the G illumination light, and the R illumination light of the incident illumination light composed of the p-polarized light.
- the configuration other than the dichroic mirror 13 is the same as that in FIG.
- a dichroic mirror 23 that transmits R illumination light and reflects G illumination light and B illumination light is used. Therefore, R-LCD7R is arranged on the first PBS4 side, and B-LCD7B is arranged on the second PBS6 side.
- the first and second PBSs 4 and 6 have characteristics of reflecting s-polarized light and transmitting p-polarized light, and the retardation plate 5 has a polarization plane of G illumination light of 9%. Since the light is transmitted by being rotated by 0 °, the same optical element as in FIG. 1 can be used.
- the dichroic prism 28 reflects the R image light, which is s-polarized light, and transmits the G image light, which is p-polarized light, and the B image light, which is s-polarized light. . Therefore, the dichroic prism 28 having the characteristics shown in FIGS. 16 and 17 is used.
- the s-polarized light shown in Fig. 16 has a high transmittance on the short wavelength side and a high reflectance on the long wavelength side so as to eliminate the influence of the incident angle.
- the transmittance from the short wavelength side to the intermediate wavelength is not affected by the incident angle, and is transmitted by approximately 100%.
- FIG. 13 is different from the optical configuration of FIG. 12 except that a dichroic mirror 33 having characteristics of reflecting R illumination light and transmitting G illumination light and B illumination light is used. Is the same as
- the light emitted from the light source is s-polarized light.
- the 1 Z 2 phase difference plate 4 9 is arranged.
- the 1/2 phase difference plate 45 provided on the entrance side of the second PBS 6 is not the G illumination light, but has a characteristic of rotating the polarization plane of the R illumination light by 90 °.
- B—L CD 7B and R—L CD 7R can be exchanged. In this case, the same dichroic mirror and dichroic prism as in FIG. 12 are used.
- the light emitted from the light source unit is s-polarized light, and the dichroic mirror 53 reflects the B illumination light, The R illumination light is transmitted.
- the dichroic mirror 53 is substantially the same as the dichroic mirror 13 in FIG.
- the same 1/2 retardation plate 49 as in FIG. 14 is provided on the front surface of the first PBS 4, and the same retardation plate 45 as in FIG. 14 is provided on the incident surface of the second PBS 6.
- B-LCD 7B and R-LCD 7R can be exchanged.
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Description
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Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
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KR10-2003-7000580A KR20040023561A (ko) | 2001-07-13 | 2002-07-15 | 반사형 액정 프로젝터 |
US10/362,451 US6980260B2 (en) | 2001-07-13 | 2002-07-15 | Reflection type liquid crystal projector |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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JP2001213748A JP2003029331A (ja) | 2001-07-13 | 2001-07-13 | 反射型液晶プロジェクタ |
JP2001-213748 | 2001-07-13 |
Publications (1)
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WO2003007073A1 true WO2003007073A1 (fr) | 2003-01-23 |
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/JP2002/007162 WO2003007073A1 (fr) | 2001-07-13 | 2002-07-15 | Projecteur a cristaux liquides du type a reflexion |
Country Status (5)
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US (1) | US6980260B2 (ja) |
JP (1) | JP2003029331A (ja) |
KR (1) | KR20040023561A (ja) |
CN (1) | CN1463384A (ja) |
WO (1) | WO2003007073A1 (ja) |
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JP2001154294A (ja) * | 1999-09-17 | 2001-06-08 | Hitachi Ltd | 光学エンジン、及びこれを用いた映像表示装置 |
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- 2002-07-15 KR KR10-2003-7000580A patent/KR20040023561A/ko active Search and Examination
- 2002-07-15 WO PCT/JP2002/007162 patent/WO2003007073A1/ja active Application Filing
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JP2001154268A (ja) * | 1999-07-28 | 2001-06-08 | Hitachi Ltd | 光学エンジン及びそれを用いた液晶プロジェクタ |
JP2001154294A (ja) * | 1999-09-17 | 2001-06-08 | Hitachi Ltd | 光学エンジン、及びこれを用いた映像表示装置 |
Cited By (12)
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EP2258357A2 (en) | 2005-08-26 | 2010-12-08 | Braincells, Inc. | Neurogenesis with acetylcholinesterase inhibitor |
EP2258359A2 (en) | 2005-08-26 | 2010-12-08 | Braincells, Inc. | Neurogenesis by muscarinic receptor modulation with sabcomelin |
EP2258358A2 (en) | 2005-08-26 | 2010-12-08 | Braincells, Inc. | Neurogenesis with acetylcholinesterase inhibitor |
EP2275096A2 (en) | 2005-08-26 | 2011-01-19 | Braincells, Inc. | Neurogenesis via modulation of the muscarinic receptors |
EP2275095A2 (en) | 2005-08-26 | 2011-01-19 | Braincells, Inc. | Neurogenesis by muscarinic receptor modulation |
EP2377530A2 (en) | 2005-10-21 | 2011-10-19 | Braincells, Inc. | Modulation of neurogenesis by PDE inhibition |
EP2314289A1 (en) | 2005-10-31 | 2011-04-27 | Braincells, Inc. | Gaba receptor mediated modulation of neurogenesis |
EP2377531A2 (en) | 2006-05-09 | 2011-10-19 | Braincells, Inc. | Neurogenesis by modulating angiotensin |
EP2382975A2 (en) | 2006-05-09 | 2011-11-02 | Braincells, Inc. | Neurogenesis by modulating angiotensin |
WO2010099217A1 (en) | 2009-02-25 | 2010-09-02 | Braincells, Inc. | Modulation of neurogenesis using d-cycloserine combinations |
WO2011063115A1 (en) | 2009-11-19 | 2011-05-26 | Braincells Inc. | Combination of nootropic agent with one or more neurogenic or neurogenic sensitizing agents for stimulating or increasing neurogenesis |
WO2011091033A1 (en) | 2010-01-20 | 2011-07-28 | Braincells, Inc. | Modulation of neurogenesis by ppar agents |
Also Published As
Publication number | Publication date |
---|---|
JP2003029331A (ja) | 2003-01-29 |
CN1463384A (zh) | 2003-12-24 |
US6980260B2 (en) | 2005-12-27 |
US20030189676A1 (en) | 2003-10-09 |
KR20040023561A (ko) | 2004-03-18 |
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