×

Light emitting device

DC
  • US 9,679,942 B2
  • Filed: 06/21/2016
  • Issued: 06/13/2017
  • Est. Priority Date: 01/22/2010
  • Status: Active Grant
First Claim
Patent Images

1. A light emitting device comprising:

  • a substrate;

    a plurality of LED chips positioned around a center of a primary surface of the substrate;

    a resin frame formed on the primary surface of said substrate and provided annularly so as to surround a mounting area in which said plurality of LED chips are provided;

    an anode-side electrode land and a cathode-side electrode land which are electrodes to be connected to an external voltage supply of said light emitting device, the anode-side electrode land and the cathode-side electrode land being provided on the primary surface of the substrate and outside said resin frame; and

    an electrode wiring pattern formed on the primary surface of said substrate including (i) a first anode pattern and (ii) a first cathode pattern, the first anode pattern and the first cathode pattern electrically connecting the plurality of LED chips to the anode-side electrode land and the cathode-side electrode land,the plurality of LED chips including a first chip, a second chip, a third chip, and a fourth chip,the first chip, the second chip, the third chip, and the fourth chip being electrically connected in series so as to constitute each of at least one series circuit,the light emitting device further comprising;

    a first wire connecting an anode electrode of the first chip and the first anode pattern directly to each other;

    a second wire connecting a cathode electrode of the first chip and an anode electrode of the second chip directly to each other;

    a third wire connecting a cathode electrode of the third chip and an anode electrode of the fourth chip directly to each other; and

    a fourth wire connecting a cathode electrode of the fourth chip and the first cathode pattern directly to each other,the first wire having a length larger than that of the second wire,the fourth wire having a length larger than that of the third wire.

View all claims
  • 2 Assignments
Timeline View
Assignment View
    ×
    ×