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:
Nov. 24, 2009
Filed:
Sep. 09, 2004
Guofu Zhou, Best, NL;
Rogier H. M. Cortie, Ittervoort, NL;
Mark T. Johnson, Veldhoven, NL;
Jan Van DE Kamer, Heerlen, NL;
Guofu Zhou, Best, NL;
Rogier H. M. Cortie, Ittervoort, NL;
Mark T. Johnson, Veldhoven, NL;
Jan van de Kamer, Heerlen, NL;
Koninklijke Philips Electronics N.V., Eindhoven, NL;
Abstract
An image is updated on a bi-stable display () such as an electrophoretic display by providing separate scaling functions (SF, SF) for scaling a duration of a reset pulse (R) and a duration of a driving pulse (D) in a drive waveform based on temperature (). An absolute value of a slope with varying temperatures of the scaling factor (SF) for the reset pulse (R) is significantly greater than that of the scaling factor (SF) for the driving pulse (D), while both scaling factors increase with decreasing temperature. Image update time (IUT) is significantly reduced at lower temperatures, while a range of variation of IUT across all temperatures is also reduced. Scaling functions (SF, SF) may also be used for scaling a duration of a help reset pulse (H) and/or a duration of one or more shaking pulses (SH, SH).