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. 30, 2002
Filed:
Jul. 31, 2000
Mathew A. Nieberger, Rocklin, CA (US);
Kristie Amanna, Roseville, CA (US);
Terry W. Smith, Rescue, CA (US);
Hewlett-Packard Co., Palo Alto, CA (US);
Abstract
A display apparatus for selectively controlling the illumination of two dependent visual indicators with a single control line. The apparatus includes two visual indicators, two amplifiers, and a logic circuit. The same end of the two visual indicators connect to a conductive terminal. A first amplifier connects between the line and the other end of one indicator and a second amplifier connects between the line and the other end of the other indicator. A combination of signals applied to the two inputs selectively illuminates one or both indicators with one signal from the control line. The inventive circuit designs of the present invention are compact in size, elegant in its simplicity and operation, and miserly in its power consumption. Therefore, a minimal amount of power will be used to highly illuminate one or two visual indicators being dependent on one another with the use of a single control pin of an IC.