Patent Number: 8,820,950

Title: Light emitting device and illumination apparatus

Abstract: According to one embodiment, a light emitting device which is attached to an illumination apparatus and radiates light having a correlated color temperature of 2900 to 3600K is provided. The light emitting device includes a substrate, blue light emitting LED elements and red light emitting LED elements mounted on the substrate, and a wavelength converting unit. The red light emitting LED elements have a luminous intensity of 0.2 to 2.5 times as large as that of the blue light emitting LED elements at normal use temperature in a state where the light emitting device is attached to the illumination apparatus. The wavelength converting unit is excited by light emitted from the blue light emitting LED elements and converts the light to light having a peak wavelength within a range of 500 to 600 nm.

Inventors: Matsuda; Shuhei (Yokosuka, JP), Shibusawa; Soichi (Yokosuka, JP), Betsuda; Nobuhiko (Yokosuka, JP), Nishimura; Kiyoshi (Yokosuka, JP)

Assignee: Toshiba Lighting & Technology Corporation

International Classification: F21V 9/16 (20060101)

Expiration Date: 9/02/12018