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:
May. 23, 1989
Filed:
May. 27, 1987
William P Harper, South Killingly, CT (US);
Michael S Lunt, Abbington, CT (US);
Rogers Corporation, Rogers, CT (US);
Abstract
In an electroluminescent lamp having a phosphor layer disposed between corresponding lamp electrodes adapted to apply an excitation potential to cause the phosphor layer to emit light, a front lamp electrode which, in addition to being light transmissive to radiation from the phosphor layer, consists of a thin layer of light-transmissive binder containing a distribution of discrete particles that are characteristically light-reflective and electrically conductive. The electrode particles provide aggregate diffuse outward reflectance sufficient to serve as a reflector behind an LCD display for ambient light that falls upon the LCD display to illuminate the display under light ambient conditions. Furthermore, the particles in the electrode layer are adapted to contribute to electrical continuity through the layer sufficient to apply excitation to the phosphor layer, and the electrode layer particles have sufficient spaces between them to provide escape-paths for light from the excited phosphor layer to back-illuminate the LCD display under dark ambient conditions. A method of forming the improved electrode, e.g. by shear transfer techniques, is also described. Certain aspects of the invention apply to the function of improved transflective layers, per se.