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:
Aug. 27, 2019
Filed:
Apr. 21, 2017
Planar Systems, Inc., Beaverton, OR (US);
Shahnad Nadershahi, Hillsboro, OR (US);
Planar Systems, Inc., Beaverton, OR (US);
Abstract
A circuit for driving at least one light emitting diode (LED) of a display based on a greyscale vector. The circuit includes brightness scale detection circuitry to determine a brightness value based on the greyscale vector and refresh cycle selection circuitry to output an indication of a subset of refresh cycles, referred to as dithered refresh cycles. The circuit also includes pulse width determination circuitry to define a pulse width based on the greyscale vector. Pulse adjustment control circuitry, for each dithered refresh cycle, determines a dithered pulse width by adjusting the pulse width by a width adjustment amount, and outputs a dithered pulse width modulation signal including a series of pulses including a pulse having the pulse width determined by the pulse width determination circuitry non-dithered refresh cycles and a pulse having the dithered pulse width for the dithered refresh cycles.