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:
Apr. 04, 2000
Filed:
May. 23, 1997
Richard A Hamersley, Wooster, OH (US);
Mark F Pleso, Sharon, PA (US);
Lee E Leppo, Tallmadge, OH (US);
Telxon Corporation, Akron, OH (US);
Abstract
A single button contrast control which can bi-directionally adjust a contrast function in one of two directions so as to increase or decrease the contrast of a display. An interrupt generator generates an interrupt for each user activation of a single button control key. A control circuit incrementally adjusts the contrast function in accordance with the interrupts generated. If no interrupts are generated within a predetermined period of time following a previous interrupt, the control circuit changes the direction in which the contrast is incrementally adjusted so that the next time a user activates the single button control key the control will be adjusted in the other direction.