×

Light-emitting device

  • US 7,449,724 B2
  • Filed: 09/08/2004
  • Issued: 11/11/2008
  • Est. Priority Date: 09/12/2003
  • Status: Expired due to Fees
First Claim
Patent Images

1. A light-emitting device comprising:

  • a first electrode having a concave portion;

    an electroluminescent layer having a plane surface formed over the first electrode having a concave portion; and

    a second electrode formed over the plane surface so as to be overlapped with the concave portion,wherein the first electrode has a curved surface at the concave portion,wherein a focal distance f of a curvature of the concave portion and a distance L between a bottom of the curved surface of the first electrode and the plane surface of the electroluminescent layer satisfies a relationship expressed by formula (1);


    f≧

    L/
    2  



    (1),wherein the second electrode has a plane surface, andwherein light generated in the electroluminescent layer is resonated between the first electrode and the second electrode and emitted as laser light through the second electrode.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×