LIGHT EMITTING DEVICE

PROBLEM TO BE SOLVED: To provide a light emitting device capable of suppressing the absorption of light radiated from a first phosphor in which an emission peak wavelength is at a low wavelength side by a second phosphor at a long-wavelength side in two kinds of phosphors having different luminescen...

Full description

Saved in:
Bibliographic Details
Main Authors KAMATA SAKUO, HAYASHI TAKAO
Format Patent
LanguageEnglish
Published 20.09.2007
Subjects
BASIC ELECTRIC ELEMENTS
ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR
ELECTRICITY
SEMICONDUCTOR DEVICES
Online AccessGet full text

Cover

More Information
Summary:PROBLEM TO BE SOLVED: To provide a light emitting device capable of suppressing the absorption of light radiated from a first phosphor in which an emission peak wavelength is at a low wavelength side by a second phosphor at a long-wavelength side in two kinds of phosphors having different luminescent colors. SOLUTION: The light emitting device comprises: two LED chips 10a, 10b for radiating blue light; a packaging substrate 20 where both the LED chips 10a, 10b are packaged; and a sealing section 30 formed by a light-transmitting resin for sealing both the LED chips 10a, 10b. A first phosphor layer 41 made of a green phosphor that is a first phosphor for radiating light having color differing from the luminescent color of the LED chip 10a is laminated on a light extraction surface 11a in one LED chip 10a. A second phosphor layer 42 made of a red phosphor that is the second phosphor for radiating light at a wavelength that is longer than that of the first phosphor is laminated on a light extraction surface 11b in the other LED chip 10b. COPYRIGHT: (C)2007,JPO&INPIT
Bibliography:Application Number: JP20060066411