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:
Jul. 02, 2013
Filed:
Jun. 05, 2009
Li-quan Tan, Sunnyvale, CA (US);
Harold J. Welch, San Jose, CA (US);
Wing Kong Low, Sunnyvale, CA (US);
Chad Bronstein, Sunnyvale, CA (US);
Li-Quan Tan, Sunnyvale, CA (US);
Harold J. Welch, San Jose, CA (US);
Wing Kong Low, Sunnyvale, CA (US);
Chad Bronstein, Sunnyvale, CA (US);
Apple Inc., Cupertino, CA (US);
Abstract
Methods and systems for efficiently embedding information in a keyboard membrane. Information can be embedded in the keyboard membrane by integrating an information embedding circuit with a switch matrix used to identify location of a key press event. The information is embedded by either hardwiring a column to a selected row, or a row to a selected column. In order to access the embedded information, the row (column) is asserted resulting in the hardwired column (row) to also be asserted. The identification of the asserted column (row) is used to point to the embedded information.