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. 17, 2016
Filed:
Aug. 08, 2007
Paul O. Scheibe, Arroyo Grande, CA (US);
Paul O. Scheibe, Arroyo Grande, CA (US);
Landmark Screens, LLC, Palo Alto, CA (US);
Abstract
An apparatus dynamically circumvents faults in the light emitting diodes (LEDs) of a pixel in a graphical display. The LEDs are organized into groups of one or more LEDs. The apparatus includes drivers for generating a current to an associated group of LEDs of the pixel and fault detectors associated with each group of LEDs. The drivers may be driven, for example, by pulse-modulated signals specifying average currents for the groups of LEDs. The fault detectors each detect fault in an associated group of LEDs and asserts a fault signal when a fault is detected. In addition, an encoder is provided to receive the fault signals from the fault detectors and to provide signals encoding the faults detected and identifying the associated groups of LEDs. A controller that receives the encoded signals may adjust the driver signals for the groups of LEDs for which no fault is detected, in order to compensate for the detected faults.