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. 12, 2014
Filed:
Sep. 05, 2012
Shafiq M. Jamal, Pleasanton, CA (US);
Shafiq M. Jamal, Pleasanton, CA (US);
Apple Inc., Cupertino, CA (US);
Abstract
A display system includes a display panel of pixels, a gate driver and a compensation unit. The gate driver receives a control signal and based on the control signal, generates a gate signal to drive a transistor included in a pixel. The compensation unit measures and compensates for a fall time of the gate driver. The compensation unit includes a replica gate driver, a peak RMS detector, a comparator and a counter. The replica gate driver generates a replica gate signal based on the control signal. The peak RMS detector calculates a peak RMS of the replica gate signal. The comparator compares the peak RMS of the replica gate signal and a reference voltage and generates a comparator value. The counter is controlled by the comparator value to generate a compensation value used to adjust the gate driver and the replica gate driver. Other embodiments are also described and claimed.