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. 09, 1991
Filed:
Nov. 23, 1988
Noah L Anglin, San Jose, CA (US);
Poqet Computer Corp., Santa Clara, CA (US);
Abstract
A back light for a liquid crystal display has a self-contained power source and can be attached to the unit having the liquid crystal display when needed in a dark ambient, and removed from the display or not carried by the user of the display when not needed. This portable back light allows the unit with the liquid crystal display to be smaller and lighter in weight than a unit having a built-in back light, and to require a smaller power supply than a unit with a built-in back light. Additinally batteries supplying power to a liquid crystal display unit will last longer. Yet with this portable back light, the user has the convenience of sufficient brightness for viewing the liquid crystal display unit when needed.