Panasonic Intellectual Property Management Co., Ltd.

Panasonic Corporation

Panasonic Corporaton

Ayako Tsukitani

Takashi Saito

Naohiro Toda

Hiroki Noguchi

Kensuke Yamazoe

Yoshinori Karasawa

Toshihide Mori

Kouichi Wada

Hiroshi Hamano

Makoto Yamada

Sayaka Nishi

Akira Takashima

Junichi Hasegawa

Yoko Matsubayashi

Shin Ukegawa

Koji Omura

Masaki Ishiwata

Shinichi Aoki

Kouji Nishioka

Hiroe Kubo

Sayaka Yamaguchi

Akira Takasima

Kaoru Ibara

A light-emitting device includes blue LED chips having a light emission peak wavelength of at least 430 nm and at most 470 nm and red LED chips having a light emission peak wavelength of at least 600 nm and at most 640 nm. The light-emitting device includes a yellow phosphor having a light emission peak wavelength of at least 500 nm and at most 580 nm and a red phosphor having a light emission peak wavelength of at least 640 nm and at most 670 nm. The light-emitting device emits white light through mixing of light emitted by each of the blue LED chips, the red LED chips, the yellow phosphor, and the red phosphor.

Light-emitting device and illuminating apparatus

An illumination system includes: a seat in a mobile body; a table to be positioned in front of a passenger when the passenger is seated on the seat; a first light source which illuminates the table; and a second light source which illuminates a region closer to the passenger than to the table. When a distance from the first light source to the table is equal to a distance from the second light source to a virtual irradiated surface, an illuminance on the table irradiated by the first light source is lower than an illuminance on the virtual irradiated surface irradiated by the second light source.

Illumination system, mobile body, and lighting control method

A lighting device is provided with an illumination unit including two or less LED light sources. The illumination unit uses the two or less LED light sources to emit light of a short wavelength band and light of a long wavelength band. An output varying unit functions to vary an output of at least the long wavelength band light. When the output varying unit receives a varying signal, the output varying unit functions to decrease the output of at least the long wavelength band light.

Lighting device

A lighting device includes a first light source having a first S/P ratio, a second light source having a second S/P ratio that is higher than the first S/P ratio, and a controller configured to performing dimming control of light output from the first and second light sources. The controller performs the dimming control separately on the first and second light sources at least under a snow covered condition.

A lighting device includes an LED light source that emits light having a first peak wavelength at 430 to 460 nm and a second peak wavelength at 530 to 570 nm.

A lighting unit emits light with an intensity in the wavelength from 430 to 510 nm that is maximum at 460 nm and minimum in the range from 490 to 500 nm, an intensity in the wavelength from 510 to 600 nm that is maximum in the range from 530 to 545 nm and minimum in the range from 570 to 580 nm, and an intensity in the wavelength of 600 nm or greater that is maximum in the range from 620 to 640. The lighting unit illuminates meat with light having a feeling of contrast index (FCI) of 135 to 145 and the illuminated meat has a metric hue angle from 54 to 56 and a color shift Duv from 0 to 5.

Lighting device for illuminating meat

A white organic electroluminescence device includes: an anode electrode; a cathode electrode; a hole transport layer arranged between the anode electrode and the cathode electrode; an electron transport layer arranged between the anode electrode and the cathode electrode; and a plurality of light emission layers into which holes and electrons are injected from the hole transport layer and the electron transport layer, the light emission layers arranged between the hole transport layer and the electron transport layer. The light emission layers are configured to have at least one emission peak wavelength for each of blue, green and red colors, and the emission peak wavelength of the blue color ranges from about 445 nm to about 455 nm.

White organic electroluminescence device

A lighting device includes first and second light emission units. The first light emission unit emits light having a relatively low color temperature and a high feeling of contrast index. The second light emission unit emits light having a relatively high S/P ratio, which is the ratio of scotopic luminance to photopic luminance. The first light emission unit illuminates a region located at a vertical upper side of a region illuminated by the second light emission unit.

In a photometry device, photopic vision luminance Lp is measured by a first luminance measuring unit including a first light filterand a first photoelectric converter, and scotopic vision luminance Ls is measured by a second luminance measuring unit including a second light filterand a second photoelectric converter. A calculation partcalculates mesopic vision luminance Lmes based on a measurement value (photopic vision luminance Lp) of the first luminance measuring unit and a ratio of a measurement value (scotopic vision luminance Ls) of the second luminance measuring unit to the measurement value (photopic vision luminance Lp) of the first luminance measuring unit. Consequently, the photometry device can improve measurement accuracy of the brightness (mesopic vision luminance) in mesopic vision.

Growing community of inventors

Kyoto, Japan

Ayako Tsukitani