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1. (US20140299904) Light emitting device

Office : United States of America
Application Number: 14203982 Application Date: 11.03.2014
Publication Number: 20140299904 Publication Date: 09.10.2014
Grant Number: 09190582 Grant Date: 17.11.2015
Publication Kind : B2
IPC:
H01L 29/22
H01L 33/50
C09K 11/08
H05B 33/14
C09K 11/77
H01L 33/56
H01L 33/54
H ELECTRICITY
01
BASIC ELECTRIC ELEMENTS
L
SEMICONDUCTOR DEVICES; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR
29
Semiconductor devices specially adapted for rectifying, amplifying, oscillating or switching and having at least one potential-jump barrier or surface barrier; Capacitors or resistors with at least one potential-jump barrier or surface barrier, e.g. PN-junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof
02
Semiconductor bodies
12
characterised by the materials of which they are formed
22
including, apart from doping materials or other impurities, only AIIBVI compounds
H ELECTRICITY
01
BASIC ELECTRIC ELEMENTS
L
SEMICONDUCTOR DEVICES; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR
33
Semiconductor devices with at least one potential-jump barrier or surface barrier specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
48
characterised by the semiconductor body packages
50
Wavelength conversion elements
C CHEMISTRY; METALLURGY
09
DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
K
MATERIALS FOR APPLICATIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
11
Luminescent, e.g. electroluminescent, chemiluminescent, materials
08
containing inorganic luminescent materials
H ELECTRICITY
05
ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
B
ELECTRIC HEATING; ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR
33
Electroluminescent light sources
12
Light sources with substantially two-dimensional radiating surfaces
14
characterised by the chemical or physical composition or the arrangement of the electroluminescent material
C CHEMISTRY; METALLURGY
09
DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
K
MATERIALS FOR APPLICATIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
11
Luminescent, e.g. electroluminescent, chemiluminescent, materials
08
containing inorganic luminescent materials
77
containing rare earth metals
H ELECTRICITY
01
BASIC ELECTRIC ELEMENTS
L
SEMICONDUCTOR DEVICES; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR
33
Semiconductor devices with at least one potential-jump barrier or surface barrier specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
48
characterised by the semiconductor body packages
52
Encapsulations
56
Materials, e.g. epoxy or silicone resin
H ELECTRICITY
01
BASIC ELECTRIC ELEMENTS
L
SEMICONDUCTOR DEVICES; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR
33
Semiconductor devices with at least one potential-jump barrier or surface barrier specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
48
characterised by the semiconductor body packages
52
Encapsulations
54
having a particular shape
CPC:
H01L 33/504
C09K 11/0883
C09K 11/7721
H01L 33/507
H01L 33/54
H01L 33/56
H01L 2224/45144
H01L 2224/48091
H05B 33/14
Y02B 20/181
Applicants: Kabushiki Kaisha Toshiba
Inventors: Yasushi Hattori
Masahiro Kato
Yumi Fukuda
Iwao Mitsuishi
Agents: Oblon, McClelland, Maier & Neustadt, L.L.P.
Priority Data: 2013-078015 03.04.2013 JP
Title: (EN) Light emitting device
Abstract: front page image
(EN)

A light emitting device according to embodiments includes a light emitting element emitting light having a peak wavelength of 425 nm or more and 465 nm or less, a first phosphor emitting light having a peak wavelength of 485 nm or more and 530 nm or less, a second phosphor emitting light having a peak wavelength longer than that of the first phosphor, and a third phosphor emitting light having a peak wavelength longer than that of the second phosphor. Then, when the peak wavelength of the light emitting element is λ0 (nm) and the peak wavelength of the first phosphor is λ1 (nm), a relation of 30≦λ1−λ0≦70 is satisfied.


Also published as:
CN104103743