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:
Jul. 29, 2025
Filed:
May. 10, 2023
Apple Inc., Cupertino, CA (US);
Yaser Azizi, Santa Clara, CA (US);
Shatam Agarwal, San Jose, CA (US);
Fenghua Zheng, Saratoga, CA (US);
David S Zalatimo, San Jose, CA (US);
Apple Inc., Cupertino, CA (US);
Abstract
An electronic device may include a display having an array of pixels that receive data signals from multiple column driver integrated circuits. Each column driver integrated circuit may include gamma amplifiers that are used to set gamma references for driving the data signals. Each gamma reference can be set using first and second (redundant) gamma amplifiers in an alternating fashion to perform auto-zeroing. The auto-zeroing operation can be combined with a chopping operation to minimize amplifier offset across the different column driver integrated circuits. The auto-zeroing and/or the chopping function can be spatially alternated across the different rows in the array and temporally alternated across the different display frames.