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7286290 |
Optical illumination apparatus
An optical illumination apparatus has a polarization conversion device for converting light from a light source into light polarized uniformly in a predetermined manner and an optical integrator...
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7281803 |
Polarization conversion assembly to complement angular transmission distribution of polarizing light modulator
An apparatus, system, and method for a polarizing conversion assembly adapted to provide polarized light having an intensity distribution to complement an angular transmission distribution of a...
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7278743 |
Single panel illumination system and projection display apparatus using the same
The present invention provides an illumination system and projection system using the same. The present invention can eliminate the reflective light on the internal optical surface of the optical...
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7273279 |
Projection display apparatus
A white light emitted from a light source is homogenized by an integrator optical system, transmitted through a color polarizer ( 113 ) to be turned into an R light and a G light of a P polarized...
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7261418 |
Projection apparatus
A projection engine uses a first polarizing beam splitter (PBS) that substantially reflects light incident along a first input direction in a first polarization state and substantially transmits...
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7255444 |
Optical unit and projection-type image display apparatus using the same
A technique according to the present invention allows a projection-type image display system to suppress the temperature rise of the polarization split devices and secure high image quality....
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7246907 |
Projection type image display apparatus using reflective image display elements, reflective polarizing plates and auxiliary analyzers
A compact, light projection type image display apparatus based on reflection image display devices which provide high brightness without contrast deterioration caused by light leakage associated...
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7245336 |
Liquid crystal display device
A liquid crystal display device includes an illumination device, a light control element arranged at a projected light side of the illumination device, a reflective polarizer arranged at an upper...
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7241014 |
Microdisplay projection
Methods and apparatus for forming two orthogonally polarized beams of light from an unpolarized beam of light using one of at least two different image modes, the forming includes a color filtering...
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7237901 |
Projection type image display device, rear projection type image display device, optical unit, and screen unit
The present invention provides a projection type image display device capable of affording a bright display of a high saturation and capable of ensuring a high reliability of optical parts. The...
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7232228 |
Light recovery for projection displays
A light recovery system for a projection display with a reflector having a first and a second focal points. A source of electro-magnetic radiation is disposed proximate to the first focal point of...
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7229177 |
Restraining temperature rise in light exiting-side polarizer constituting liquid crystal light valve
Embodiments of the invention restrain temperature rise in a light exiting-side polarizer included in a liquid crystal light valve without limiting the quantity of light incident on the liquid...
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7222965 |
Optical unit and a projection image display apparatus using the same
The present invention provides a projection image display technology capable of correcting astigmatism due to use of a polarized-beam splitter, thus ensuring high-resolution projection images. A...
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7213920 |
Image display apparatus
According to the present invention, there is provided an image display device including a non-luminous reflection type spatial light modulating element, illuminating system to illuminate the...
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7213924 |
Image projection apparatus and image projection system
The image projection apparatus includes a first, a second and a third reflective liquid crystal display element, an illumination optical system which color-separates light from a light source into...
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7210788 |
Color prism and projection-type image display apparatus employing the same
A color prism capable of separating incident light into four color beams and synthesizing incident four-color beams, and a projection-type image display apparatus employing the color prism. The...
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7207676 |
Image projection apparatus
A reflection type projector apparatus uses polarized beam filters that are resistant to fluctuations in incident angle as the light beam splitting elements and in which are provided for the blue...
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7202918 |
LCD projection system and illumination device thereof
The present invention relates to an illumination device of an LCD projection system. The illumination device comprises a light source, a quarter-wave retardation and a wire grid polarizer. The...
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7193248 |
LED backlighting system
A liquid crystal display (LCD) device having non-white and white light emitting diodes and a liquid crystal display. A spectrum converting material is positioned between non-white LEDs and the LCD...
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7190519 |
Plate-like polarizing element, a polarizing conversion unit provided with the element, and a projector provided with the unit
This specification discloses a polarizing. element for dividing light into first and second polarized lights differing in polarized state from each other by a polarizing dividing surface, directing...
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7180557 |
Liquid-crystal projector
A projection unit comprises a light source unit and an image forming unit. The light source unit includes a light source section and an illuminating optical system which condenses the illuminating...
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7156520 |
Color separating optical system, image display optical system, and projection image display apparatus
A color separating-combining optical system is configured to separate illumination light into a plurality of color spectrums, guiding these color spectrums to respective image display elements, and...
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7154671 |
High efficiency electromagnetic beam projector, and systems and methods for implementation thereof
This invention relates to electromagnetic wave beam paths, formation of the beam, illumination of programmable electromagnetic wave field vector orientation rotating devices (“PEMFVORD”) with...
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7150532 |
Projection system with scrolling unit
A projection system including a light source, a polarization conversion system, a reflection mirror, a color separator, a scrolling unit, a light valve, and a projection lens unit is provided. The...
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7148936 |
Color-separation/synthesis optical system with particular cut-off wavelengths and emission-side polarizer and projection type liquid crystal display device using the same
The present invention provides a projection type liquid crystal display device capable of achieving a high contrast ratio without causing optical leakage on boundary wavelength regions of three...
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7139042 |
Display device with capacity of displaying three-dimensional images
A display device for selectively displaying any one of 2D and 3D images with a capacity of displaying the 3D image with the same resolution as that of the 2D image. The display device includes a...
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7131730 |
Illumination optical system and projection display optical system
An illumination optical system which can use light from a light source with high efficiency and can provide an illumination luminous flux with highly uniform illuminance, is disclosed. The...
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7131729 |
Projection display apparatus
A projection display apparatus that is lightweight and provides bright, high quality images is provided. The projection display apparatus comprising a color separation and synthesis optical system ...
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7131737 |
Housing for mounting a beamsplitter and a spatial light modulator with an output optical path
A housing ( 500 ) for a wire grid polarizing beamsplitter ( 240 ) and a spatial light modulator ( 210 ) in alignment with an output optical path has a front plate having an opening ( 502 ) for...
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7130122 |
Polarization recovery system for projection displays
A waveguide polarization recovery system both polarizes the input light energy for use with an LCD imager and converts the polarity of unusable light energy to add to the illumination of the LCD...
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7130120 |
Prism, projection and optical component
An apparatus for transmitting or reflecting incident light. The apparatus includes a pair of diffraction grid substrates; a substantially grid-shaped diffraction grid formed of metal, wherein the...
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7126648 |
Liquid crystal projector comprising a plurality of light shielding members fixed between the lens array and the polarized light generator
Heat generation is inhibited in a polarized light generating optics system in a projector. A liquid crystal projector includes: lens arrays 140, 150 that generate partial light beams from a...
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7126649 |
Oblique plate compensators for projection display systems
Projection systems having o-plate compensation elements are described. The compensation elements may be negative, positive or biaxial anisotropic element and may have a homogeneous tilt or a...
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7118229 |
Illumination optical system and projector using the same
The present invention provides a technique for readily changing the design of a projector. A projector comprises: an illumination optical system; a light modulation device; a projection optical...
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7119957 |
Polarization luminaire and projection display
A polarization luminaire is disclosed having a light source that emits light having random polarization directions, a first lens plate and a second lens plate. The first lens plate has a plurality...
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7111942 |
Reflection-type image projection unit and a reflection-type image display apparatus, and a light source device for use therein
In a reflection-type image projecting unit, being applicable into a reflection-type image display apparatus, being superior in contrast and achieving small-sizing of the apparatus, together with a...
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7108374 |
Image display device having a field lens
A color management system for use with projection displays includes an image assimilator and an analyzer. The image assimilator comprises a panel that produces a light beam comprising spatial...
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7110053 |
Reflective liquid crystal projection apparatus with elliptical polarization
A reflective liquid crystal projection apparatus 14 is composed of a light source 2, a polarizing plate 16 A for incident light, a reflective liquid crystal element 8, another polarizing...
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7102822 |
High efficiency electromagnetic beam projector, and systems and methods for implementation thereof
This invention relates to electromagnetic wave beam paths, formation of the beam, illumination of programmable electromagnetic wave field vector orientation rotating devices (“PEMFVORD”) with...
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7101047 |
Projection display systems for light valves
Projection display systems for light valves such as liquid crystal display panels, and in particular to the use of color component rotators, such as retardation filters, to provide for improved...
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7097306 |
Projection device and liquid crystal panel unit for use in the projection device
A projection device includes on a chassis a liquid crystal panel for irradiation with light from a light source, a polarizing plate opposing the liquid crystal panel, and an optical compensation...
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7092159 |
Polarization recovery system for projection displays
A waveguide polarization recovery system both polarizes the input light energy for use with an LCD imager and converts the polarity of unusable light energy to add to the illumination of the LCD...
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7090351 |
Projection type image display apparatus
A compact, light projection type image display apparatus based on reflection image display devices which provide high brightness without contrast deterioration caused by light leakage associated...
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7090350 |
Optical projection system and method
An optical projection system can receive a red light beam, green light beam, and blue light beam. The optical projection system includes a color-combination prism, and the light beams respectively...
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7081997 |
High efficiency electromagnetic beam projector, and systems and methods for implementation thereof
This invention relates to electromagnetic wave beam paths, formation of the beam, illumination of programmable electromagnetic wave field vector orientation rotating devices (“PEMFVORD”) with...
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7073911 |
Projector with improved heat radiation
An optical apparatus includes a color synthesizing prism, a plurality of exit-side polarizer plates which are respectively arranged on the light entrance side faces of the color synthesizing prism...
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7070280 |
Method for the generation of light of a given polarization state
A method and apparatus or configuration generates light of a given polarization state (P). A polarization state-sensitive beam splitter is acted upon by light (L) at an input (E 1 ), light (L P )...
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7072096 |
Uniform illumination system
A compact and efficient optical illumination system featuring planar multi-layered LED light source arrays concentrating their polarized or un-polarized output within a limited angular range. The...
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7066600 |
Projection type image display apparatus
Disclosed is a compact, light, inexpensive reflection type liquid crystal projector optical unit or reflection type liquid crystal projector which provides high brightness without contrast...
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7059725 |
Reflection-type image projection unit and a reflection-type image display apparatus, and a light source device for use therein
In a reflection-type image projecting unit, being applicable into a reflection-type image display apparatus, being superior in contrast and achieving small-sizing of the apparatus, together with a...
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