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:
Feb. 22, 2000
Filed:
Aug. 14, 1997
Robert J Alvord, Elmwood Park, IL (US);
Leonard W Jenski, Roselle, IL (US);
Other;
Abstract
A method and apparatus for operating and executing a self-test routine of an LED display device adapted for assembly into home appliance. The device is comprised of a plurality of LED elements, a control processor, a switch assembly, and a signaling element. The self-test routine comprises disposing the switch assembly in a predetermined pattern for detecting switch operability and initiating a program in the processor for self-testing of illumination of the LED elements. The elements are monitored during the self-test routine for communicating a minimum current level preselected as identifying proper illumination. Failure of the self-test routine to properly detect minimum current levels precludes a proper response from the signaling element within a predetermined time limit, thereby causing the display device to be identified as an unacceptable device.