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:
Oct. 25, 1994
Filed:
Dec. 24, 1992
Applicant:
Inventors:
Gerald V Piosenka, Scottsdale, AZ (US);
Peter J Leahy, Scottsdale, AZ (US);
Assignee:
Motorola, Inc., Schaumburg, IL (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02F / ;
U.S. Cl.
CPC ...
359 94 ; 359 86 ; 351169 ;
Abstract
Eyeglasses including lenses that contain liquid crystal nematic materials with variable refractive indexes. A voltage is applied across the materials to change the refractive index in accordance with a measured distance so that the lenses are always automatically focused as the operator looks at objects different distances away. The distances are measured by an infrared ranging system included in the glasses, which system changes the voltage applied to the material in accordance with changes in distance.