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:
Jan. 18, 2011
Filed:
May. 12, 2003
Guofu Zhou, Eindhoven, NL;
Mark Thomas Johnson, Eindhoven, NL;
Guofu Zhou, Eindhoven, NL;
Mark Thomas Johnson, Eindhoven, NL;
Adrea, LLC, Sunnyvale, CA (US);
Abstract
An electrophoretic display having charged particles that are able to occupy, between a first and second electrode, two limit positions and intermediate positions between the two limit positions which are defined by a drive voltage. An addressing circuit generates the drive voltage waveform by successively applying between the first electrode and the second electrode, during an image update period, a reset pulse enabling particles of the display to substantially occupy one of the limit positions, and a drive pulse having a level in accordance with an optical state to be reached by one of the pixels. The addressing circuit generates a first shaking pulse having at least one preset pulse having energy sufficient to release particles present in one of the limit positions, but insufficient to enable the particles to reach the other one of the extreme limit positions.