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:
Oct. 05, 2010
Filed:
Feb. 25, 2005
James C. Rutherford, Fort Wayne, IN (US);
James C. Rutherford, Fort Wayne, IN (US);
Imaging Systems Technology, Inc., Toledo, OH (US);
Abstract
An organic electroluminescent display device connected by a blocking diode in series to an organic light-emitting diode (OLED). Each pixel or subpixel of the electroluminescent display device comprises an OLED, a blocking diode to prevent the OLED from being reversed biased, a rectification diode to isolate the column electrode from unselected rows and a capacitor as a memory device. The charge stored in each memory capacitor may be increased by the blocking diode in series with each OLED. A frame period of the display device is divided into sub-frames that have address and light emission periods. Current mode data programming is used to address the device in each sub-frame. A ramp waveform is applied to the row electrode during the light emission period, to cause the capacitor to discharge through the OLED and control the forward current level.