Title:
ORGANIC ELECTROLUMINESCENT ELEMENT, PRINTER HEAD AND EXPOSURE SYSTEM
Document Type and Number:
Japanese Patent JP2014179574
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide an organic electroluminescent element small in the luminance distribution within an irradiation area.SOLUTION: The present organic electroluminescent element includes: a first electrode on a light extraction side; a second electrode disposed to face the first electrode; and a luminous layer held between the first electrode and the second electrode and having a plurality of maximum emission wavelengths. When a maximum emission wavelength at which the luminous layer has a maximum emission intensity is denoted as λ, a maximum emission wavelength longer than λis denoted as λ, a wavelength at which reflectance is minimum is denoted as λ, the reflectance being a ratio between an amount of light of visible light vertically applied on a side of the second electrode from the outside via the first electrode and an amount of light reflected at the second electrode and emitted toward the outside from the first electrode, λ, λ, and λsatisfy an expression of λ<λ<λ.
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Inventors:
MORI MASATAKA
SUZUKI SACHIE
DEGUCHI KOJI
YAMAGA TAKUMI
SHINODA MASAHITO
MIYAGAWA SATOSHI
SUZUKI SACHIE
DEGUCHI KOJI
YAMAGA TAKUMI
SHINODA MASAHITO
MIYAGAWA SATOSHI
Application Number:
JP2013054340A
Publication Date:
September 25, 2014
Filing Date:
March 15, 2013
Export Citation:
Assignee:
RICOH CO LTD
International Classes:
H01L51/50; C09K11/06; H05B33/24
Attorney, Agent or Firm:
Tadashige Ito
Tadahiko Ito
Tadahiko Ito