US 7,321,197 B2
High-efficiency organic light emitting element
Takahiro Nakayama, Hitachinaka (Japan); Hajime Murakami, Tomobe (Japan); and Masao Shimizu, Hitachi (Japan)
Assigned to Hitachi Displays, Ltd., Chiba (Japan)
Filed on Aug. 23, 2004, as Appl. No. 10/924,750.
Claims priority of application No. 2003-303051 (JP), filed on Aug. 27, 2003; and application No. 2004-094009 (JP), filed on Mar. 29, 2004.
Prior Publication US 2005/0236982 A1, Oct. 27, 2005
Int. Cl. H01J 1/62 (2006.01)
U.S. Cl. 313—506  [313/498; 313/504] 8 Claims
OG exemplary drawing
 
1. An organic light emitting element using a light-emitting molecules having a relaxation time of excited state is 1 μs or more, the element comprising an anode, a cathode and a light-emitting film provided between the anode and the cathode, wherein
both of the anode and the cathode are transparent electrically conductive films, a pair of reflecting films are provided on each side of both the anode and cathode opposite to the side which faces the light-emitting film, one of the reflecting films is a metallic reflection film, and the gap between the reflecting films has function as light vibrator.