LIGHT-EMITTING APPARATUS

• US 20170038051A1
• Filed: 08/02/2016
• Published: 02/09/2017
• Est. Priority Date: 08/03/2015
• Status: Active Grant

• Current Assignee: Citizen Watch Co Limited (Citizen Electronics Company Limited)
• Original Assignee: Citizen Electronics Company Limited, Citizen Holdings Co., Ltd.
• Inventors: Fukasawa, Koichi
• Granted Patent: US 10,429,050 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: F21V 29/503 of light sources cooling arrangements structurally associated with gas-discharge or vapour-discharge lamps H01J61/52; cooling arrangements structurally associated with electric incandescent lamps H01K1/58; cooling arrangements structurally associated with light-emitting diodes H01L33/64
• CPC Class Codes: F21V 3/02 characterised by the shape
• CPC Class Codes: F21Y 2105/12 characterised by the geometrical disposition of the light-generating elements, e.g. arranging light-generating elements in differing patterns or densities
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]
• CPC Class Codes: H01L 2224/48091 Arched
• CPC Class Codes: H01L 2224/48137 the bodies being arranged next to each other, e.g. on a common substrate
• CPC Class Codes: H01L 25/0753 the devices being arranged next to each other
• CPC Class Codes: H01L 2924/00014 the subject-matter covered by the group, the symbol of which is combined with the symbol of this group, being disclosed without further technical details
• CPC Class Codes: H01L 33/504 Elements with two or more wavelength conversion materials
• CPC Class Codes: H01L 33/56 Materials, e.g. epoxy or silicone resin
• CPC Class Codes: H01L 33/62 Arrangements for conducting electric current to or from the semiconductor body, e.g. lead-frames, wire-bonds or solder balls
• CPC Class Codes: H01L 33/641 characterized by the materials

Abstract

A light-emitting apparatus according to the present invention has a packaging substrate having a packaging area, a plurality of light-emitting elements packaged in the packaging area, and a sealing resin that seals the plurality of light-emitting elements. The plurality of light-emitting elements includes light-emitting elements packaged in a first packaging area including the center of the packaging area and light-emitting elements packaged in a second packaging area surrounding the perimeter of the first packaging area. The packaging density of the light-emitting elements packaged in the first packaging area is higher than the packaging density of the light-emitting elements packaged in the second packaging area.

Claims

1. A light-emitting apparatus comprising:

a packaging substrate having a packaging area;

a plurality of light-emitting elements packaged in the packaging area; and

a sealing resin that seals the plurality of light-emitting elements, wherein

the plurality of light-emitting elements includes light-emitting elements packaged in a first packaging area including the center of the packaging area and light-emitting elements packaged in a second packaging area surrounding the perimeter of the first packaging area, and

the packaging density of the light-emitting elements packaged in the first packaging area is higher than the packaging density of the light-emitting elements packaged in the second packaging area.

2. The light-emitting apparatus according to claim 1, wherein

each of the light-emitting elements packaged in the first packaging area is arranged in the form of a lattice so that the interval between light-emitting elements adjacent to each other is a first interval, and

each of the light-emitting elements packaged in the second packaging area is arranged so that the interval between light-emitting elements adjacent to each other is a second interval wider than the first interval.

3. The light-emitting apparatus according to claim 1, wherein

the packaging substrate is a metal substrate.

4. The light-emitting apparatus according to claim 1, further comprising:

an optical element that is mounted on the packaging substrate so as to cover the sealing resin and which collects light emitted from the plurality of light-emitting elements.