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:
Jun. 12, 2001
Filed:
Mar. 01, 2000
Mathew Arthur Nieberger, Rocklin, CA (US);
Hewlett-Packard Company, Palo Alto, CA (US);
Abstract
A display apparatus for selectively and independently controlling the illumination of two diode indicator lights with a single control line. The apparatus includes first and second diode indicator means connected in parallel with one another, with the cathode to anode direction of the first diode indicator means being opposite the second diode indicator means. A circuit means is provided which is adapted to selectively provide one of high, low and medium voltage levels on a control output line responsive to combinations of high and low DATA and ENABLE signals. One of the first and second diode indicator means being switched on when the output line voltage level is high, the other being switched on when the voltage level is low and neither indicator means being switched on when the voltage level is medium.