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:
Apr. 23, 1996
Filed:
Oct. 25, 1993
Morgan D Murphy, Kokomo, IN (US);
Diego A Borrego, Lafayette, IN (US);
Steven G Skiver, Kokomo, IN (US);
Delco Electronics Corporation, Kokomo, IN (US);
Abstract
A plurality of optical projectors focus telltale messages, one at a time, onto a vehicle instrument panel display area. In one embodiment a logic circuit assigns priority to the messages and displays only the message of higher priority when more than one message is prompted. The projection lamps are high intensity LEDs arranged in parallel but having diodes in series with lower priority lamps to hold them off when a higher priority lamp is energized. A constant current source regulates the LED current. In another embodiment two message lamps are controlled by a logic circuit such that when both are prompted for display an oscillator causes the messages to be displayed alternately, but when either message alone is prompted, its lamp will be energized continuously.