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. 14, 2020
Filed:
Aug. 23, 2018
Hannstar Display (Nanjing) Corporation, Nanjing, CN;
Hannstar Display Corporation, Taipei, TW;
Chien-Ting Chan, Tainan, TW;
HannStar Display (Nanjing) Corporation, Nanjing, CN;
HannStar Display Corporation, Taipei, TW;
Abstract
A shift register and a display apparatus are provided. The shift register includes a pre-charge unit, a pull-up unit, a first pull-down unit and a second pull-down unit. The pre-charge unit receives first and second input signals, and outputs a pre-charge signal via a first node. The pull-up unit receives a pre-charge signal and a clock signal, and outputs a scanning signal via a second node. The first pull-down unit receives the pre-charge signal, first and second pull-down control signals, and controls whether to pull-down the scanning signal to a reference voltage level. The second pull-down unit receives the pre-charge signal, first and second pull-down control signals, and controls whether to keep the scanning signal at the reference voltage level. The duty cycle of the clock signal is less than 50 percent.