Citizen Electronics Co., Ltd.

Citizen Watch Company, Ltd.

Citizen Holdings Company, Ltd.

Tatsuya Katoh

Sadato Imai

Masahiro Watanabe

Kazuki Matsumura

Hiroaki Eguchi

Takuya Funakubo

Tadahiro Fukuda

Maki Takehara

Takeru Ohmori

Hitoshi Saito

Provided is a light-emitting device and a method for manufacturing the same which avoid a distinct color unevenness during the light emission even if variations are present among the light-emitting elements in the concentration of the phosphor that precipitates in the resin for sealing the light-emitting elements. The light-emitting device includes a substrate, a plurality of light-emitting elements that are mounted on the substrate, a first resin layer that integrally seals the light-emitting elements and includes a first phosphor that is excited by light from the light-emitting elements at a concentration that is high as it goes to a lower end near the substrate from an upper end distant from the substrate, and a second resin layer that is provided at an upper side of the first resin layer and includes a second phosphor that is excited by light from the light-emitting elements at a uniform concentration.

Light-emitting device and method for manufacturing same

A light-emitting apparatus having an LED-mounting surface having an improved light reflective efficiency is provided. The light-emitting apparatus includes a board, a first reflective layer arranged on the board, a second reflective layer different from the first reflective layer, arranged at a position different from the position of the first reflective layer on the board, a first configuration configured by a first LED element mounted on the first reflective layer and a first phosphor-containing resin which protects the first LED element and transforms a wavelength of light emitted from the first LED element, and a second configuration configured by a second LED element mounted on the second reflective layer and a second phosphor-containing resin which protects the second LED element and transforms a wavelength of light emitted from the second LED element. A reflective efficiency of the first reflective layer for first light emitted from the first configuration is higher than a reflective efficiency of the second reflective layer for the first light.

Light-emitting apparatus

A light-emitting apparatus is provided which can improve the reflectance of light in the emission wavelength region of the LED. The light-emitting apparatus includes a mount board constituted by a metal support, a circuit board provided with an opening and fixed onto the mount board, a multi-layered film containing silver as a light-reflecting material, the multi-layered film being stacked on the mount board exposed in the opening, exclusive of a portion of the mount board onto which the circuit board is fixed, and an LED element mounted on the multi-layered film.

Light-emitting apparatus and method of manufacturing the same

To provide an LED lighting apparatus and a method for manufacturing the same that can improve the bonding strength between an aluminum substrate and a printed wiring substrate. An LED lighting apparatus and a method for manufacturing the same, the LED lighting apparatus includes an aluminum substrate, a plurality of reflectivity-enhanced layers formed on the aluminum substrate, an LED device bonded on said plurality of reflectivity-enhanced layers, a printed wiring substrate bonded onto a region on the aluminum substrate other than a region where the plurality of reflectivity-enhanced layers are formed, a wire for connecting between the printed wiring substrate and the LED device, a frame member formed so as to surround said LED device, and a phosphor resin deposited over a region inside the frame member.

LED lighting apparatus and method for manufacturing the same

Light emitting diode

Light source

Light-emitting diode

Growing community of inventors

Ebina, Japan

Tatsuya Katoh