Citizen Electronics Co., Ltd.

Citizen Watch Company, Ltd.

Citizen Holdings Company, Ltd.

Yuki Suto

Jo Kinosita

Yusuke Watanabe

Kazuya Ishihara

Jo Kinoshita

Makoto Arai

Munetaka Itami

Ishihara Kazuya

Kouichi Fukasawa

A light emitting device includes a first light emitting element, a second light emitting element, a first phosphor sheet containing a first phosphor and a third phosphor, and covering a top face of the first light emitting element, and a second phosphor sheet containing a second phosphor and a fourth phosphor, and covering a top face of the second light emitting element, wherein a peak wavelength of light which is wavelength-converted by the first phosphor or the third phosphor is equal to or less than a peak wavelength of light which is wavelength-converted by the second phosphor or the fourth phosphor.

Light emitting element with particular phosphors

A mobile device including: at least an imaging element; and a light-emitting device that irradiates a subject in accordance with imaging of the imaging element, in which the light-emitting device includes a semiconductor light-emitting element, and the difference of the normalized spectral power distribution at a wavelength of 580 nm and a value B representing a difference between normalized spectral power distributions in a wavelength range from 540 nm to 610 nm and a wavelength range from 610 nm to 680 nm are appropriate values. By providing a wavelength control element, it is possible to improve the color reproducibility and the like of a captured image. The mobile device achieves both sensitivity improvement and color reproducibility in a trade-off relationship.

Mobile device

Light emitting device with phosphors

A light emitting device includes a light emitting element including electrodes on its under face, a phosphor cover attached to the light emitting element so as to cover a top face and a side face of the light emitting element, and a reflection frame including a side face holding periphery of the phosphor cover and a tilted face tilting from the side face to the outside and upward.

Light emitting device and method of manufacturing light emitting device

A light-emitting device includes a substrate that includes at least a pair of electrodes, an LED element electrically mounted on the substrate, a phosphor plate adhered to an upper surface of the LED element and including an upper surface and a lower surface each having an area larger than that of the upper surface of the LED element, a white resin provided on an upper surface of the substrate and seamlessly covering a peripheral side surface of the LED element and a peripheral side surface of the phosphor plate. A lower surface of the phosphor plate is adhered to the upper surface of the LED element through a transparent adhesive.

Light-emitting device including transparent resin with curved surface arranged at side facing light-emitting diode element

Light-emitting device including LED element whose upper surface is free from white resin and method of manufacturing the same

Growing community of inventors

Fujiyoshida, Japan

Yuki Suto