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:
Sep. 21, 1976
Filed:
Dec. 16, 1974
Applicant:
Inventor:
W S Henrion, Houston, TX (US);
Assignee:
Texas Instruments Incorporated, Dallas, TX (US);
Primary Examiner:
Int. Cl.
CPC ...
H05B / ;
U.S. Cl.
CPC ...
219216 ; 219543 ; 346 / ; 357 56 ;
Abstract
An integrated semiconductor circuit has a portion thereof divided into a plurality of air isolated mesas which constitute a heater element array. A heater transistor formed within each mesa is selectively turned on in response to logic signals to heat one mesa of the array. By selectively heating the correct mesas, an area of the mesa array corresponding to a desired character is heated. Thermally sensitive material on which a dynamic display is formed or on which a permanent display is printed is in thermal contact with the material of the heater element array. Also formed within each mesa is its corresponding driver transistor.