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Light emitting device and method of manufacturing the same
 
   
Document Number
US Patent 7579771
Issued Date
August 25, 2009
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Abstract
All lights generated in an organic compound layer are not taken out towards a TFT from a cathode as a transparent electrode. For instance, the light is emitted in a lateral direction (direction parallel to the substrate surface) but the light emitted in the lateral direction is not taken out resultantly, which leads to a loss. Therefore, a light emitting device structured so as to increase the amount of light taken out in a certain direction is provided as well as a method of manufacturing this light emitting device. As a result of etching treatment, an upper edge portion of an insulator (19) is curved to have a radius of curvature, a slope is formed along the curved face while partially exposing layers (18c and 18d) of a first electrode, and a layer (18b) of the first electrode is exposed in a region that serves as a light emitting region. Light emitted from an organic compound layer (20) is reflected by the slope of the first electrode (layers 18c and 18d) to increase the total amount of light taken out in the direction indicated by the arrow in FIG. 1A.
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Number of Claims:
41
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Published
August 25, 2009
Application Number
10/419,640
Filed
April 21, 2003
US Classification
313/504   313/503 313/506
Int'l Classification
H05B   33/00   (20060101)  
Examiner
Attorney/Law Firm
Priority Data
Apr 23, 2002 [JP] 2002-121522
USPTO Field of Search
313/499   313/113   313/504   313/505   313/506   428/917  
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