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:
Mar. 26, 1991
Filed:
Jun. 22, 1987
Timothy Fohl, Carlisle, MA (US);
Warren C Gungle, Danvers, MA (US);
Robert Y Pai, Hamilton, MA (US);
GTE Products Corporation, Danvers, MA (US);
Abstract
A tri-color lamp for use as an element in the optical presentation of information. The lamp includes a sealed envelope having a common envelope member and a plurality (e.g., three) of longitudinally extending leg members. A common electrode is located within the common envelope member and is spacedly located from opposing electrodes located within each of the leg members. A phosphor layer within the sealed envelope subtends at least the major body portion of each of the leg members such that the surface brightness of the phosphor layer as viewed through the end portions of the lamp is greater than the intensity of the external surface brightness of the phosphor layer on the major body portion. In the presentation of color information, each of the leg members is coated with respective phosphors emitting the primary colors red, green and blue.