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:
Feb. 26, 2002
Filed:
Jun. 08, 1999
Naoto Inoue, Chiba, JP;
Tetsuo Shioura, Chiba, JP;
Seiko Instruments Inc., , JP;
Abstract
A protection circuit for an LCD controller IC comprises normally-off transistors through which a large current may escape, a resistor for disturbing the movement of charge in gate electrodes of transistors of an input circuit, and normally-off transistors for allowing electric charge in the gate electrodes of the transistors of the input circuit to escape. In one embodiment, the protection circuit includes first and second normally-off NMOS transistors connected to an input pad of the IC, a resistor arranged between the first and second normally-off NMOS transistors and the input circuit, and a third normally-off PMOS transistor and fourth normally-off NMOS transistor connected between the resistor and the input circuit.