Nec Corporation

Nec Platforms, Ltd.

Nec Lcd Technologies, Ltd.

Nlt Technologies, Ltd.

Nec C Orporation

Seiko Company, Ltd.

Fujio Okumura

Masao Imai

Ken Sumiyoshi

Koya Takata

Goroh Saitoh

Shinichi Uehara

Satoshi Kyosuna

Teruaki Suzuki

Go Watanabe

Osamu Ishibashi

Daigo Miyasaka

Hiroshi Haga

Shin-ichi Uehara

Ichiro Fujieda

Junichirou Ishii

Hiroyuki Sekine

Masahiko Ohta

Shinya Niioka

Kenji Wakafuji

Hirofumi Tsuda

Kenichi Takatori

Shingo Watanabe

Kazuyuki Hayashi

Kazuhiko Aoki

Junichi Funada

Satoshi Komatsu

Hisashi Mizumoto

Yoshiho Yanagita

Masakazu Ono

Kohei Yoshida

Kazushi Sugyo

Yoichiro Mizuno

Toshiki Imamura

Ryota Nihei

Hiroshi Imai

Shigeyuki Iwasa

Hiroki Sugiyama

Hideki Asada

Nobuaki Takanashi

Kunihiro Shiota

Kenji Sera

Shigeru Asai

Susumu Tsujikawa

Kenji Tagami

Kouji Mimura

Takahiko Kanamori

So Nishimura

Eiji Akiyama

Kazuhide Yoshinaga

Shigetoshi Hayata

Tamio Uchino

Yoshiaki Furuya

Youhei Saitou

Katsuhisa Ishii

To provide an antenna capable of accelerating beamforming. The antenna includes a metasurface with an opening part that receives electromagnetic waves and a MEMS mechanism configured to change a shape of the opening part by operating a moveable member with respect to the opening part of the metasurface.

Antenna and beam forming method

Provided is a display antenna including a display including a plurality of light emitters arranged in a grid, an antenna array having an antenna assembly in which a plurality of patch antennas through which light in a wavelength band of a visible region is transmitted is disposed in a grid, the antenna array being disposed to be superimposed on the display, and a phase shifter disposed in a gap region sandwiched between the plurality of light emitters, connected to at least one of the plurality of patch antennas, and configured to shift a signal to be transmitted and received.

Display antenna

A projection device includes a light source that emits parallel light, a spatial light modulator including a modulation part that modulates a phase of the parallel light emitted from the light source, a control unit that tiles the modulation part with tiles of at least two resolutions in which a phase image related to an image displayed by projection light being set, sets the phase image to each of the plurality of tiles that are tiled, and causes the light source to radiate the parallel light toward the modulation part in which the phase image is set; and, and a projection optical system that projects light modulated by the spatial light modulator as the projection light.

Projection device, control method, and recording medium

Provided is an antenna device including an antenna array including a plurality of patch antennas arrayed in a grid, a first switch group including a first switch disposed on a wiring line connecting two adjacent patch antennas, and a second switch group including a second switch disposed on a wiring line between an antenna assembly formed by at least four adjacent patch antennas and a signal source connected to at least one patch antenna constituting the antenna assembly.

Antenna device and display antenna

A projection device a includes a light source that emits parallel light, a spatial light modulator that has a modulation part that modulates a phase of the parallel light emitted from the light source, a liquid crystal projection lens that includes a liquid crystal region on which modulated light modulated by the spatial light modulator is incident and that projects the modulated light in a lens region dynamically formed in the liquid crystal region as projection light, and a control unit that causes the lens region to be formed at a desired position in the liquid crystal region of the liquid crystal lens, sets a phase image corresponding to the projection light projected toward a projection target, to the modulation part of the spatial light modulator, and controls the light source to emit the parallel light toward the modulation part to which the phase image is set.

Projection device and projection method

A light receiving device that includes a lens that collects a spatial light signal, a sensor array including a plurality of light receivers that receives the spatial light signal collected by the lens, and a reception unit that integrates an electric signal derived from the spatial light signal received by each of the plurality of light receivers and selects a light receiver that receives the spatial light signal. according to a voltage value of the integrated electric signal.

Light receiving device and communication device

A management system includes a monitoring device and at least one detection device. The monitoring device projects detection light for detecting a monitoring target, and identifies the monitoring target based on a detection pattern of reflected light of the detection light. The detection device is installed on the monitoring target. The detection device receives the detection light projected by the monitoring device, and reflects the detection light at a timing set to the detection device in a predetermined period starting from a timing at which the detection light is received.

Management system

A gas detection that includes a projector including a light source that emits laser light having a wavelength at which an absorption rate by a detection target gas is high and a spatial light modulator that modulates the laser light emitted from the light source, a projection control unit that controls projection light to be projected toward a retroreflector by causing the light source to emit the laser light and setting a pattern of a modulation part of the spatial light modulator, a light receiver that receives reflected light of the projection light reflected by the retroreflector and measures an intensity of the received reflected light; and a leakage determination unit that acquires the intensity of the reflected light from the light receiver and determines leakage of the detection target gas in a detection space with the retroreflector based on the intensity of the reflected light.

Gas detection device, gas detection system, and gas detection method

A light transmitting device that includes a light transmitter that transmits a spatial light signal including a communication signal, and a light transmission control unit that adds a dummy signal having a same brightness as a ghost image of the communication signal to the spatial light signal and controls the light transmitter in such a way that the dummy signal is displayed at a position of the ghost image.

Light transmitting device, communication system, and light transmitting method

A display system includes a plurality of tags and a detection device. Each tag of the plurality of tags stores an identification code for identifying that tag, generates electric power upon receiving light that contains identification information to be compared with the identification code, and emits light using the electric power of that tag when the identification information contained in the received light matches the identification code. The detection device generates image data in accordance with an input of the identification information on a selected article, projects scanning light containing identification information on the position of the tag extracted from the generated image data, and, when emitted light from any of the plurality of tags is detected from the image data acquired during a period in which the scanning light is projected, projects marking light within a range attached with the tag that has emitted light.

Display system and display method

A light-receiving device includes: a light guide plate of a transparent member having a first surface and a second surface as principal surfaces opposed to each other and an emission surface formed on at least one end of the transparent member; a lens sheet having lenses and is disposed opposite to the first surface; a support member that supports the lens sheet such that a distance between the principal surface of the lens sheet and the second surface is equal to the focal distance of the lenses; a directional light-guide layer that is disposed on the second surface of the light guide plate and guides, toward the emission surface, the travel direction of an optical signal entering the light guide plate; and a receiver that receives the optical signal emitted from the emission surface of the light guide plate and converts the received optical signal into an electric signal.

Light-receiving device

In order to efficiently receive spatial light without using a condensing lens, this light receiving device comprises: a first light guide body that has at least a first light receiving surface and a first light emission end and guides, in an oriented manner, signal light entering from the first light receiving surface to the first light emission end; a second light guide body that has at least a second light receiving surface and a second light emission end, the second light receiving surface being connected to the first light emission end, and that guides, in an oriented manner, signal light entering from the second light receiving surface to the second light emission end; and a light receiver that has a light receiving part connected to the second light emission end and that converts the signal light received by the light receiving part to an electrical signal.

Light receiving device, and light transmitting and receiving device

A light-receiving device includes: a light guide plate that is a transparent member having, as main surfaces, a first surface and a second surface facing each other and has an emission end formed on at least one end portion of the light guide plate; a wave plate that is disposed on the first surface of the light guide plate and converts an optical signal of circularly polarized light into linearly polarized light; a hologram layer that is disposed on the second surface of the light guide plate and guides a traveling direction of the optical signal converted into the linearly polarized light toward the emission end of the light guide plate; and a light receiver that receives the optical signal emitted from the emission end of the light guide plate and converts the received optical signal into an electrical signal.

In order to reliably detect a target object located within a projection area and measure a distance to the detected target object, a distance measurement system includes: a light emitting device including a phase-modulation-type spatial light modulator element, and configured to emit projected light for forming a pattern associated with a phase distribution displayed on a display part of the spatial light modulator element, toward at least two projection areas; a light receiving device for capturing an area including a pattern to be formed by projected light emitted by the light emitting device; and a control device for controlling light emission from the light emitting device, verifying, for each projection area, presence or absence of a target object within the projection area by analyzing imaging data captured by the light receiving device, and measuring a distance to a detected target object.

Distance measurement system, distance measurement method, and program recording medium

An information display system includes a frame, a pair of cameras arranged at both side ends of the frame, a transparent display fitted into the frame, a display position setting device that detects a target based on a feature extracted from image data captured by the pair of cameras, and sets, as a display position, a position at which a straight line connecting an eye of a user wearing the frame and the target passes through the transparent display, and a controller that controls the transparent display in such a way as to display a point light at the display position set by the display position setting device.

Information display system and wearable device

Growing community of inventors

Tokyo, Japan

Fujio Okumura