Mitsubishi Electric Corporation

Denka Company Limited

National Institute for Materials Science

Kabushikikaisha Kenwood

Shintaro Watanabe

Yusuke Takeda

Tomohiro Nomiyama

Marina Takamura

Masaru Miyazaki

Tatsuya Okuzono

Naoto Hirosaki

Takashi Matsumoto

Hiroshi Kage

Ryo Yoshimatsu

Hiroshi Hirosaki

Yoshikuni Kataoka

Atsushi Matsumoto

Yasushi Yamaguchi

Manabu Kobayashi

Kazuhiro Iyomasa

Shigeyuki Nakayama

Yukiyasu Domae

Ryosuke Torama

Makito Seki

Hirotaka Namioka

Hirotaka Sakamoto

Nobuyuki Takahashi

Takashi Hirano

Wataru Tsujita

Jun Ishii

Hirotoshi Yano

Hisashi Terada

Masanobu Osawa

Keita Kobayashi

Junji Hori

Yutaka Ezaki

Ryosuke Kawanishi

Hiroaki Maehara

Makoto Hirano

Satoru Sofuku

Taiyo Yamaura

Jun Takaso

Natsuki Tahara

Toshiyuki Hatta

Asako Shigeta

Shotaro Miwa

Yusuke Nakamatsu

Chihiro Kishi

Ryohei Murachi

Shoichi Shimizu

Shoji Mochizuki

Akira Hidaka

Masayoshi Sato

A pupil detection device includes an eye area image obtaining unit that obtains image data representing an eye area image in a captured image obtained by a camera; a luminance gradient calculating unit that calculates luminance gradient vectors corresponding to respective individual image units in the eye area image, using the image data; an evaluation value calculating unit that calculates evaluation values corresponding to the respective individual image units, using the luminance gradient vectors; and a pupil location detecting unit that detects a pupil location in the eye area image, using the evaluation values.

Pupil detection device, line-of-sight detection device, occupant monitoring system, and pupil detection method

Included are: a captured image acquiring unit to acquire a captured image obtained by imaging an occupant; a temperature image acquiring unit to acquire a temperature image indicating a temperature of a surface of a body of the occupant measured in a non-contact manner; a motion detection unit to detect a motion of the occupant on the basis of the captured image; a temperature detection unit to detect a temperature of a hand of the occupant on the basis of the temperature image; and an awakening level estimating unit to estimate an awakening level of the occupant on the basis of the motion of the occupant detected by the motion detection unit and the temperature of the hand of the occupant detected by the temperature detection unit.

Occupant state detection device and occupant state detection method

A biological information acquisition device includes a detection-value acquisition unit to acquire a detection value from a non-contact biometric sensor, a vital measurement unit to measure a vital sign of a target person (TP) using the detection value, an image-data acquisition unit to acquire image data indicating an image captured by a camera, an image processing unit to perform at least one of a state estimation process of estimating a state of the target person, an attribute estimation process of estimating an attribute of the target person, or a personal identification process of identifying the target person by performing image processing on the image captured including the target person, and a parameter setting unit to set a parameter in measuring the vital sign in accordance with a result of the image processing.

Biological information acquisition device and biological information acquisition method

A β-sialon phosphor represented by general formula: SiAlON(0<z<4.2) has as a host crystal, a crystal structure identical to that of a β-sialon crystal phase and having a bulk density of 0.80 g/cmor more and 1.60 g/cmor less. Also, a light-emitting element includes the β-sialon phosphor and a semiconductor light-emitting element capable of exciting the β-sialon phosphor.

β-SiAlON phosphor and light-emitting apparatus

A red phosphor represented by general formula: MSiAlN, wherein M is at least one or more elements selected from Mg, Ca, Sr and Ba, and is partially replaced with Eu and has, as a host crystal, a crystal structure identical to that of a CaAlSiNcrystal phase, and the phosphor has a bulk density of 0.70 g/cmor more and 2.30 g/cmor less. There is also provided a light-emitting element including the red phosphor and a semiconductor light-emitting element capable of exciting the red phosphor.

Red fluorescent body and light-emitting device

A phosphor powder composed of α-sialon phosphor particles containing Eu. The phosphor powder has an ammonium ion concentration Cof the phosphor powder of equal to or more than 15 ppm and equal to or less than 100 ppm, which is determined from the following extracted ion analysis. (Extracted Ion Analysis A) 0.5 g of a phosphor powder is added to 25 ml of distilled water in a polytetrafluoroethylene (PTFE)-made container with a lid and held at 60° C. for 24 hours, and then a total mass Mof ammonium ions included in an aqueous solution obtained by removing a solid content from the solution by filtration is determined using ion chromatography. Then, Cis determined by dividing Mby the mass of the phosphor powder.

Phosphor powder, composite, and light-emitting device

A phosphor having a main crystal phase having a crystal structure identical to that of CaAlSiN, and including a Ca element partially replaced with an Eu element, wherein the phosphor has a median size d50 of 12.0 &#x3bc;m or more and 22.0 &#x3bc;m or less, as measured according to a laser diffraction scattering method, and has a specific surface area of 1.50 m/g or more and 10.00 m/g or less, as measured according to a BET method.

Red phosphor and light emitting device

A &#x3b2;-sialon phosphor that is a solid solution of europium, in which Dis 7.0 &#x3bc;m or more and 20.0 &#x3bc;m or less and (D&#x2212;D)/Dis 0.60 or less, where Dis a 50% area diameter of primary particles of the &#x3b2;-sialon phosphor, and Dis a 10% area diameter of the primary particles of the &#x3b2;-sialon phosphor. Primary particles are defined as single-crystal particles distinguished for each crystal orientation by identifying the crystal orientation of individual particles of the &#x3b2;-sialon phosphor by an electron backscatter diffraction image method. Dand Dare obtained by image analysis of the cross-sectional area of the primary particles.

B-sialon phosphor and light emitting device

An &#x3b1;-sialon phosphor particle containing Eu. At least one minute recess is formed on a surface of the &#x3b1;-sialon phosphor particle. The &#x3b1;-sialon phosphor particle is preferably produced by undergoing a raw material mixing step, a heating step, a pulverizing step, and an acid treatment step.

Phosphor particle, composite, light-emitting device, and method for producing phosphor particle

A three-dimensional position estimation device includes: a feature point extracting unit for detecting an area corresponding to the face of an occupant in an image captured by a camera for imaging a vehicle interior and extracting a plurality of feature points in the detected area; an inter-feature-point distance calculating unit for calculating a first inter-feature-point distance that is a distance between distance-calculating feature points among the plurality of feature points; a face direction detecting unit for detecting the face direction of the occupant; a head position angle calculating unit for calculating a head position angle indicating the position of the head of the occupant with respect to an imaging axis of the camera; an inter-feature-point distance correcting unit for correcting the first inter-feature-point distance to a second inter-feature-point distance that is a distance between distance-calculating feature points in a state where portions of the head corresponding to the distance-calculating feature points are arranged along a plane parallel to an imaging plane of the camera using a result detected by the face direction detecting unit and the head position angle; and a three-dimensional position estimating unit for estimating the three-dimensional position of the head using the head position angle, the second inter-feature-point distance, and a reference inter-feature-point distance.

Three-dimensional position estimation device and three-dimensional position estimation method

A phosphor powder composed of &#x3b1;-sialon phosphor particles containing Eu. In a case where an internal quantum efficiency after the phosphor powder is held at 600&#xb0; C. for 1 hour in an air atmosphere is defined as P1 and an internal quantum efficiency after the phosphor powder is held at 700&#xb0; C. for 1 hour in an air atmosphere is defined as P2, P1 is equal to or more than 70% and (P1&#x2212;P2)/P1&#xd7;100 is equal to or less than 2.8%.

The purpose of the invention is to both improve the luminance of a SCASN-based phosphor and achieve deep-color rendering properties. Provided is a red phosphor having a main crystal phase having the same crystal structure as a crystal structure of CaAlSiN, the main crystal phase represented by the general formula MAlSiN, wherein an internal quantum efficiency, as measured when the red phosphor is excited by light having a wavelength of 455 nm, is 71% or more, and M in the general formula represents an element group containing at least three elements selected from Eu, Sr, Mg, Ca, and Ba, the element group containing Eu, Sr, and Ca as essentials, and a Eu content is 4.5 mass % or more and 7.0 mass % or less, a Sr content is 34.0 mass % or more and 42.0 mass % or less, and a Ca content is 0.8 mass % or more and 3.0 mass % or less.

Red phosphor and light emission device

A passenger state detection device () includes: a correction parameter setting unit () for setting a correction parameter for a captured image captured by a camera () for capturing a vehicle interior for each of detection items in passenger state detecting process including the multiple detection items using at least one of a feature amount in a face part area that corresponds to a passenger's face part in the captured image or a feature amount in a structure area that corresponds to a structure in the vehicle interior in the captured image; and an image correcting unit () for correcting the captured image for each of the detection items in the passenger state detecting process using the correction parameter set by the correction parameter setting unit ().

Passenger state detection device, passenger state detection system, and passenger state detection method

A phosphor powder composed of &#x3b1;-sialon phosphor particles containing Eu. With regard to the phosphor powder, a volume-based median diameter (D) determined by a laser diffraction scattering method is equal to or more than 10 &#x3bc;m and equal to or less than 20 &#x3bc;m, and a diffuse reflectance with respect to light at a wavelength of 600 nm is equal to or more than 93% and equal to or less than 99%.

An &#x3b1;-sialon phosphor particle containing Eu. At least one slit is formed on a surface of the &#x3b1;-sialon phosphor particle. The &#x3b1;-sialon phosphor particle is preferably produced by undergoing a raw material mixing step, a heating step, a pulverizing step, and an acid treatment step.

Growing community of inventors

Tokyo, Japan

Shintaro Watanabe