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:
Jun. 30, 2009
Filed:
Mar. 15, 2005
Toshiyuki Nozawa, Okaya, JP;
Toshiyuki Nozawa, Okaya, JP;
Seiko Epson Corporation, Tokyo, JP;
Abstract
To ensure uniformity of display regardless of a characteristics difference and temporal deterioration of a light-emitting element. An optical feedback type pixel circuit having a photoelectric transducer therein comprises a capacitor Cfor storing as an electric charge an integral value of the photoelectric current output from the photoelectric transducer; a comparator for changing a level of an output voltage Vout at a timing when a first voltage set according to the electric charge stored in the capacitor Creaches a second voltage set according to data supplied through a data line X; and a transistor Telectrically controlled according to the output voltage Vout from the comparator for making an organic EL element OLED emit light when the first voltage has not reached the second voltage and for making the organic EL element OLED stop emitting the light when the first voltage reaches the second voltage.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile