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:
Dec. 31, 2019
Filed:
May. 22, 2018
Apple Inc., Cupertino, CA (US);
Chin-Wei Lin, San Jose, CA (US);
Majid Gharghi, San Carlos, CA (US);
Apple Inc., Cupertino, CA (US);
Abstract
A display may have gate driver circuitry that include a series of linked gate driver circuits each of which has an output and has an input coupled to the output of a preceding one of the gate driver circuits. Bootstrapping circuitry may be provided in the gate driver circuitry. Each gate driver circuit may have a bootstrapping circuit that includes transistors and a bootstrapping capacitor. Bootstrapping efficiency may be enhanced by configuring the bootstrapping capacitor to reduce parasitic capacitances. A transistor in each bootstrapping circuit may have first and second source-drain terminals, and a gate terminal that lies between the first and second source-drain terminals and that runs parallel to the first and second source-drain terminals. The bootstrapping capacitor may have a first electrode formed from the gate terminal and a second electrode that overlaps the first electrode and that lies between the first and second source-drain terminals.