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. 06, 1994
Filed:
Feb. 23, 1993
Applicant:
Inventor:
Keith C Rawlings, Cheltenham, GB;
Assignee:
Smiths Industries Public Limited Company, London, GB;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01J / ;
U.S. Cl.
CPC ...
313506 ; 313505 ; 313509 ; 313512 ; 3151693 ; 345 30 ; 345 32 ; 345 80 ; 345 76 ; 345 82 ;
Abstract
A display or other radiation-emitting device has an array of vertical ballistic transistors which produce electrons that flow into overlying phosphor regions. Light produced by the phosphors is focussed by an array of convex lenses above the phosphor regions to provide a high intensity display with limited viewing angle.