The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 18, 2009
Filed:
Feb. 24, 2005
Isamu Kobori, Tokyo, JP;
Isamu Kobori, Tokyo, JP;
Sony Corporation, Tokyo, JP;
Abstract
The invention provides a display device capable of improving color separation characteristics by using a color filter having high transmittance. An organic light emitting device emits blue light, red light, and green light, and the emission intensity of the green light is relatively lower than those of the blue light and the red light. A green fluorescence conversion layer for absorbing a blue wavelength component and emits green light is provided between the organic light emitting device and a green filter layer. Color purity of blue and red is improved by decreasing a green light emitting component causing decreasing color purity when blue and red are separated by a color filter, and by using the color filter having high transmittance and low density. The decreased green light emitting component is complemented with the green fluorescence conversion layer, chromaticity is adjusted by a green filter layer, and thereby light emitting efficiency and color reproducibility are improved.