Light emitting diode device

• US 20040046178A1
• Filed: 08/27/2003
• Published: 03/11/2004
• Est. Priority Date: 08/29/2002
• Status: Abandoned Application

• Current Assignee: Citizen Electronics Company Limited
• Original Assignee: Citizen Electronics Company Limited
• Inventors: Sano, Masaki
• Application Number:
  US10/648,224
• Publication Number:
  US 20040046178A1
• Time in Patent Office: Days
• US Class Current: 257/98
• CPC Class Codes: H01L 2224/48091 Arched
• CPC Class Codes: H01L 2924/00012 Relevant to the scope of the group, the symbol of which is combined with the symbol of this group
• 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 2924/181 Encapsulation
• CPC Class Codes: H01L 33/44 characterised by the coatings, e.g. passivation layer or anti-reflective coating
• CPC Class Codes: H01L 33/50 Wavelength conversion elements

Abstract

An LED device has an LED mounted on a substrate, and a transparent resin including phosphor particles for changing a color of light emitted from the LED, and sealing the LED. The transparent resin is colored by a dye at least on the surface. The dye is for correcting the changed color to a desired color.

Claims

1. An LED device comprising:

an LED mounted on a substrate;

a transparent resin including phosphor particles for changing a color of light emitted from the LED, and sealing the LED; and

a dye dyeing the sealing resin for correcting the color of the light from the LED.

2. The device according to claim 1 wherein the dye has a color for correcting the color of the light from the LED to acquiring a desired color of light.

3. The device according to claim 1 wherein the dye has a complementary color to the color of the light emitted from the LED for a desired color.

4. The device according to claim 1 wherein at least a surface of the sealing resin is dyed by the dye.

5. A method for manufacturing an LED device comprising the steps of:

mounting an LED on a substrate;

sealing the LED with a transparent resin including phosphor particles to form an LED device before being dyed;

measuring chromaticity of light from the LED device before being dyed;

dyeing the sealing resin by a dye having a color for correcting the measured chromaticity to a desired color.

6. The method according to claim 5 wherein dyeing of the transparent resin is controlled by at least one condition selected from the concentration of the dye, the temperature of a liquid in which a dye is put, and the time in soaking the LED device before being dyed in the liquid containing the dye.