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:
May. 21, 1996
Filed:
Nov. 06, 1992
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
In a panel member of a coordinates input device, a first input unit and a second input unit are set on a pair of transparent electrodes and the first input unit only allows input by a member of a relatively large pressing pressure such as by using a pen. The second input unit also allows input by pressing with a member of a relatively small pressing pressure, such as a finger, and thus is not limited to a pen. In order to achieve a coordinates input device of enhanced accuracy in the reading of pressing position by accurately measuring the pressing level at the pressing position, the device possesses a structure in which an X-direction resistive film and a Y-direction resistive film are separated by a tiny clearance and, when the pressing position is pressed, various switches are controlled by a specified procedure such that the X-direction and Y-direction levels of the contact resistance due to the pressing of the position are detected and, only when the pressing levels are sufficient, are coordinates of the pressing position measured.