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:
May. 08, 2007
Filed:
Oct. 16, 2003
Nobuyuki Ito, Tokyo-to, JP;
Norihito Ito, Tokyo-to, JP;
Nobuyuki Ito, Tokyo-to, JP;
Norihito Ito, Tokyo-to, JP;
Dai Nippon Printing Co., Ltd., Tokyo-to, JP;
Abstract
The present invention relates to an electroluminescent (EL) element comprising at least a substrate, an electrode formed on the substrate and an electric light emitting layer and to a display using this element as pixel unit. The object of the present invention is to provide a display without property deterioration due to heating of the EL layer or remaining of the solvent, and is practical though the thickness of the film is uneven. A display comprising the electroluminescent element, wherein the light emitting region is changed by the applied voltage, as a pixel unit wherein the display is driven by a digital gradation driving method in which a low voltage value at which the pixel dose not emit light is a non-selected state, and a high voltage value at which the light emitting region within the pixel is saturated is a selected state. By using the present invention, though the film thickness is not even, a practical display with excellent gradation control property can be provided.