METHOD OF MANUFACTURING LIGHT-EMITTING DEVICE

• US 20170018678A1
• Filed: 06/28/2016
• Published: 01/19/2017
• Est. Priority Date: 07/13/2015
• Status: Active Grant

• Current Assignee: Toyoda Gosei Company Limited (Toyota Motor Corporation)
• Original Assignee: Toyoda Gosei Company Limited (Toyota Motor Corporation)
• Inventors: FUKAGAWA, Koji, TERAYAMA, Takashi
• Granted Patent: US 10,644,192 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H01L 2933/0041 relating to wavelength conversion elements
• CPC Class Codes: H01L 33/0095 Post-treatment of devices, e.g. annealing, recrystallisation or short-circuit elimination

Abstract

A method of manufacturing a light-emitting device includes measuring a light distribution of a light-emitting element, sealing the measured light-emitting element by a sealing material including a phosphor, and curing the sealing material by heat treatment. An emission angle dependence of emission chromaticity of the light-emitting device is controlled by setting a degree of settling of the phosphor in the sealing material according to the measured light distribution of the light-emitting element.

Claims

1. A method of manufacturing a light-emitting device, comprising:

measuring a light distribution of a light-emitting element;

sealing the measured light-emitting element by a sealing material including a phosphor; and

curing the sealing material by heat treatment,

wherein an emission angle dependence of emission chromaticity of the light-emitting device is controlled by setting a degree of settling of the phosphor in the sealing material according to the measured light distribution of the light-emitting element.

2. The method according to claim 1, wherein the degree of settling of the phosphor is controlled by adjusting a dispersant concentration in the sealing material.

3. The method according to claim 1, wherein the degree of settling of the phosphor is controlled by changing the conditions of the heat treatment.

4. The method according to claim 1, wherein the phosphor comprises a plurality of types of phosphors.