Nec Corporation

Nlt Technologies, Ltd.

Nec Lcd Technologies, Ltd.

Nec Viewtechnology, Ltd.

Getner Foundation LLC

Kanehiro Co., Ltd.

Masao Imai

Fujio Okumura

Goroh Saitoh

Masanao Natsumeda

Shin Tominaga

Daigo Miyasaka

Shin-ichi Uehara

Junichirou Ishii

Shinya Niioka

Shinichi Uehara

Naofumi Suzuki

Mizuho Tomiyama

Kazunori Kimura

Ken Sumiyoshi

Kenichi Takatori

Hideki Asada

Ken-Ichi Takatori

Yuji Ohno

Yukinori Shioya

Susumu Tsujikawa

Makoto Sato

Keiichi Kubota

Hiroshi Imai

Akira Maeda

Setsuo Kaneko

Nobuaki Takanashi

Koji Mimura

Osamu Ishibashi

Masahiro Uchida

Koji Sugita

Goro Saito

Yoshie Yagi

Osamu Akasi

Seigo Tominaga

Kazumasa Isiguro

Setuko Suzuki

Yoshi Yagi

An illumination device comprises a light source that includes a solid-state light source whose peak wavelength is set in the red wavelength band, a light source that includes a solid-state light source whose peak wavelength is set in the green wavelength band, a light source that includes a solid-state light source whose peak wavelength is set in the blue wavelength band, and a color synthesis optical element that combines P-polarized colored light incident from one light source and S-polarized colored light incident from the other two light sources. One light source includes at least one solid-state light source whose peak wavelength is set in the wavelength band of the color corresponding to one of the other light sources.

Illumination device and projection display device using same

A liquid crystal shutter eyeglass that can solve the problem in which the provision of excellent images cannot be kept if the situation of the viewer varies is provided. A liquid crystal shutter () has a light transmitting and shading region in which a state can change between a light transmitting state in which light is caused to transmit and a light shading state in which light is caused to be shaded. A driving section () changes the state between the light transmitting state and the light shading state of a driving region that is at least part of the light transmitting and shading region. A controlling means () adjusts at least one of a size and a position of the driving region of which the driving section () changes the state.

Liquid crystal shutter eyeglass

A first dichroic mirror () and a second dichroic mirror () are formed on the bonding surfaces between four right angle prisms (-) so as to intersect. The first dichroic mirror () transmits, of visible light of P-polarization, at least the light of a specific wavelength band and reflects, of visible light of S-polarization, at least the light of the specific wavelength band. The second dichroic mirror () transmits, of visible light of P-polarization, at least light of the specific wavelength band and transmits, of visible light of S-polarization, at least light of the specific wavelength band. The cutoff wavelengths with respect to S-polarized light of both dichroic mirrors (and) are set within ranges of bands other than those of the three primary colors of light.

Color synthesis optical element, projection-type display device using same, and method for controlling display thereof

An illumination device comprises a light source () that includes a solid-state light source whose peak wavelength is set in the red wavelength band, a light source () that includes a solid-state light source whose peak wavelength is set in the green wavelength band, a light source () that includes a solid-state light source whose peak wavelength is set in the blue wavelength band, and a color synthesis optical element () that combines P-polarized colored light incident from one light source () and S-polarized colored light incident from the other two light sources (and). One light source () includes at least one solid-state light source whose peak wavelength is set in the wavelength band of the color corresponding to one of the other light sources ().

A first light source that emits first light of a first wavelength band; an optical path separator that separates the first light into fourth light and fifth light having different optical paths from each other; and a first optical path combiner that combines the fourth light and the fifth light are included, where the fourth light includes light of a fourth wavelength band being a predetermined band in the first wavelength band and light having a polarization component in a first direction being a predetermined polarization direction in a fifth wavelength band being a band other than the fourth wavelength band in the first wavelength band, and the fifth light is light having a polarization component in a second direction orthogonal to the first direction in the fifth wavelength band.

Projection display apparatus and projection light generating method

Disclosed is three-dimensional video viewing system () including: display system () that displays three or more videos of different parallaxes in a time-division multiplexing manner, and outputs a control signal that indicates a switching timing of the videos; input means () for designating an arbitrary display mode among a plurality of display modes in which a plurality of three-dimensional videos different from one another in three-dimensionality are defined by a combination of two of the three or more videos; two shutters that switch a state between light transmission and light blocking; and a shutter drive circuit that specifies the switching timing of the two videos corresponding to the display mode designated by input means () based on the control signal, and independently controls opening/closing of the shutters at the specified switching timing of the videos.

Three-dimensional video viewing system, display system, optical shutter, and three-dimensional video viewing method

A three-dimensional picture viewing system includes: display system () that multiplexes and displays, in a time-division manner, three or more pictures including two or more pictures with different parallaxes and at least one subtitle picture and outputs a control signal indicating a switching timing of the pictures; input means () for designating an arbitrary display mode among a plurality of different display modes in which display pictures to be viewed are determined from among the three or more pictures; two shutters that switch a state between light transmission and light blocking; and a shutter driving circuit that specifies switching timings of the display pictures corresponding to the display mode designated by input means () based on the control signal, and independently controls opening/closing of the two shutters at the specified switching timing of the pictures.

Three-dimensional picture viewing system, display system, optical shutter, and three-dimensional picture viewing method

A first light source that emits first light of a first wavelength band; an optical path separator that separates the first light into third light and second light whose polarization directions are orthogonal to each other; an optical path separator and combiner that separates the second light into fourth light and fifth light having different wavelength bands from each other; a reflector that reflects the fifth light to a direction of the optical path separator and combiner; and an optical path combiner that combines the third light and the second light are included.

The image transmission system of the present invention is provided with: a time-division display apparatus sequentially displaying first to N-th (N: an integer of 2 or more) images with a frequency above M&#xd7;N [Hz] (M: an integer of 1 or more) by time division; a multiplexing unit plane-sequentially multiplexing the first to N-th images in accordance with the order of displaying the first to N-th images on the time-division display apparatus; a transmitting unit sending out the multiplexed images which have been multiplexed by the multiplexing unit to a predetermined image transmission path with a frame frequency of M [Hz]; and a receiving unit receiving the multiplexed images from the transmitting unit via the predetermined image transmission path and sequentially transmitting image data of the multiplexed images to the time-division display apparatus.

Image transmission system, image transmission apparatus and image transmission method

An optical element that can reduce the etendue of emitted light emitted from the optical element without having depend on the etendue of light-emitting elements is provided with a plasmon-excitation layer that is interposed between two layers having dielectric properties wherein, taking the plasmon-excitation layer as a border, the effective dielectric constant of the emission-side portion that is the emission layer side is higher than the effective dielectric constant of the incident-side portion that is the side of a carrier-generating layer, and the dielectric constant between the plasmon-excitation layer and the carrier-generating layer is higher than the dielectric constant between the carrier-generating layer and the light-incident surface.

Optical element, light source apparatus, and projection-type display apparatus

Disclosed is an optical element that includes: carrier generation layer () in which carriers are generated by light from light guide body () into which light from a light-emitting element enters; plasmon excitation layer () that has a plasma frequency higher than the frequency of light generated when carrier generation layer () is excited by light from the light-emitting element; and wave vector conversion layer () that converts surface plasmon generated by plasmon excitation layer () light having a predetermined exit angle to output the light. Plasmon excitation layer () is sandwiched between two layers having dielectric properties. The effective dielectric constant of the incident side portion of plasmon excitation layer () including an entire structure stacked above light guide body () side is higher than that of the exit side portion of plasmon excitation layer () including the entire structure stacked above wave vector conversion layer () side and the medium in contact with wave vector conversion layer ().

Optical element, light source device, and projection display device

The present invention includes light valve section () having substrate () through which light that exits plurality of optical connection mechanisms () that switch between the transmitting state and the shading state of light emitted from light emitting element () transmits and plasmon coupling section () that is arranged in light valve section () and that causes plasmon coupling to occur with light that exits light emitting element (). Plasmon coupling section () includes carrier generation layer () that generates carriers with light that exits light emitting element () and plasmon excitation layer () that has a higher plasma frequency than the frequency of light that is generated in carrier generation layer () excited with the light emitted from light emitting element (). Wave number vector conversion layer () is arranged on substrate (). Wave number vector conversion layer () converts the light or surface plasmons generated in plasmon excitation layer () into light having a predetermined exit angle. Plasmon excitation layer () is sandwiched between first dielectric constant layer () and second dielectric constant layer ().

Display element, display device, and projection display device

An optical device featuring high efficiency and luminance is provided. The optical device includes carrier generation layer that causes fluorescence to occur with incident light, plasmon excitation layer that excites first surface plasmons with said fluorescence, carrier generation layer being laminated on carrier generation layer, and exit layer that extracts the first surface plasmons or light that occurs on an opposite surface of carrier generation layer contact surface of plasmon excitation layer to the outside. Carrier generation layer contains metal particles that excite second surface plasmons with said incident light.

Optical device for projection display device having plasmons excited with fluorescence

The present invention includes light valve section () having a plurality of shutter mechanisms () that switch between a transmitting state and a shading state of light emitted from light emitting element (); and substrate () through which light that exits plurality of shutter mechanisms () is transmitted. The display element also has plasmon coupling section () that causes plasmon coupling to occur with light that exits the light valve section (). Plasmon coupling section () includes carrier generation layer () that generates carriers with incident light that exits light valve section (), plasmon excitation layer () that has a higher plasma frequency than the frequency of light that is generated in carrier generation layer () excited with the light emitted from light emitting element (), and wave number vector conversion layer () that converts the light or surface plasmons generated in plasmon excitation layer () into light having a predetermined exit angle. Plasmon excitation layer () is sandwiched between first dielectric constant layer () and second dielectric constant layer ().

Disclosed are an optical device, an optical element, and an image display device that can achieve an improved absorption efficiency of excitation light. The optical device includes: a light-emitting element; a carrier generation layer on which light from the light-emitting element is incident and in which carriers are generated; a plasmon excitation layer that excites a plasmon, stacked on the upper side of the carrier generation layer and has a plasma frequency higher than a frequency of light generated when the carrier generation layer is excited by the light from the light-emitting element; and an exit layer that converts light or a surface plasmon generated on a surface of the plasmon excitation layer into light having a predetermined exit angle and from which the light having the predetermined exit angle exits. The optical device further includes a polarization conversion layer on the lower side of the carrier generation layer.

Growing community of inventors

Tokyo, Japan

Masao Imai