IP Library Granted Patent US 9,773,954
Granted Patent B2
US 9,773,954 · App. 14/965,290 · Granted Sep 26, 2017

Light emitting device and method of manufacturing light emitting device

Inventors: Yuki Suto (Fujiyoshida, JP); Jo Kinosita (Fujiyoshida, JP)
Assignees: Citizen Electronics Co., Ltd.; Citizen Watch Co., Ltd.
H01L33/504H01L24/97H01L25/0753H01L33/486H01L33/56H01L33/60H01L2224/13H01L2924/0002H01L2933/005H01L2933/0033H01L2933/0041H01L2933/0058
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Quick Facts
Patent No.
US 9,773,954
App. No.
14/965,290
Granted
Sep 26, 2017
Kind
B2
Abstract

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.

Claims (18)

1. A light emitting device comprising:

a light emitting element including electrodes only on its under face, wherein the electrodes are flip-chip bonded to a substrate;

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 holding side face for contacting a periphery of the phosphor cover only at a position below the top face of the light emitting element to hold a periphery of the phosphor cover and a tilted face tilting from the holding side face position of contact to the outside and upward,

wherein the tilted face is spaced from the periphery of the phosphor cover.

2. The light emitting device according to claim 1 , wherein a height of the holding side face is ⅓ to ⅔ of a height of the light emitting element.

3. The light emitting device according to claim 1 , wherein the light emitting element, the phosphor cover, and the reflection frame are fixed to the substrate, which is electrically connected to the electrodes.

4. The light emitting device according to claim 1 , further comprising a resin layer having a function of condensing or diffusing light emitted from the light emitting element and output from the phosphor cover and light which is wavelength-converted by the phosphor cover.

5. The light emitting device according to claim 1 , wherein a part of the reflection frame is disposed below an under face of the light emitting element.

6. The light emitting device according to claim 1 , wherein the reflection frame is formed by a resin member or a metal member including a surface on which a plating film is formed.

7. The light emitting device according to claim 1 , further comprising:

a second light emitting element including electrodes on its under face; and

a second phosphor cover attached to the second light emitting element so as to cover a top face and a side face of the second light emitting element;

wherein the reflection frame includes a second side face holding periphery of the second phosphor cover and a second tilted face tilting from the second side face to the outside and upward.

8. The light emitting device according to claim 7 , wherein

the phosphor cover includes a first phosphor and a third phosphor different from the first phosphor,

the second phosphor cover includes a second phosphor different from a first phosphor and a fourth phosphor different from the second phosphor, and

peak wavelength of light which is wavelength-converted by the first phosphor is equal to or less than peak wavelength of light which is wavelength-converted by the second phosphor and is equal to or less than peak wavelength of light which is wavelength-converted by the fourth phosphor, and peak wavelength of light which is wavelength-converted by the third phosphor is equal to or less than the peak wavelength of light which is wavelength-converted by the second phosphor and is equal to or less than peak wavelength of light which is wavelength-converted by the fourth phosphor.

Assignments (2)
CHANGE OF NAME Recorded Dec 29, 2016
From: CITIZEN HOLDINGS CO., LTD.
To: CITIZEN WATCH CO., LTD.
Reel/Frame 041220/0318 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Apr 26, 2016
From: SUTO, YUKI; KINOSITA, JO
To: CITIZEN ELECTRONICS CO., LTD.; CITIZEN HOLDINGS CO., LTD.
Reel/Frame 038385/0404 →
Priority Claims (1)
JP 2014-251254 · Dec 11, 2014 · national
Continuity (1)
Related Publication 20160172550A1 · Jun 16, 2016