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:
Dec. 09, 1997
Filed:
Jan. 29, 1996
Raymond Lippmann, Ann Harbor, MI (US);
Michael John Schnars, Clarkston, MI (US);
James Edward Nelson, North Branch, MI (US);
Mark James Miller, Grand Blanc, MI (US);
Delco Electronics Corporation, Kokomo, IN (US);
Abstract
An LCD display is backlit by a main light pipe with LEDs of a first color along one edge or opposed edges which uniformly flood the display with the first color, and with an LED of a second color coupled by a second light pipe to another edge to introduce light to local areas of the main light pipe. Filters of the second color over the local areas are illuminated by the second color LED. Prismatic sheets between the main light pipe and the LCD aid in the uniform distribution of the first color and improve display brightness by directing light toward the operator's eyebox.