Patent ID: 8059095
Filing Date: 2011-11-15
Classification: G08B,G09G

Abstract:
1. A wireless security system keypad comprising: a detector configured to determine at least one of an attachment of said wireless keypad to a fixed location and a proximity of said wireless keypad to said fixed location; a processor coupled to said detector; a memory coupled to said processor, wherein the memory contains instructions that when executed by said processor prevent access to a least one function when said detector fails to indicate one of said attachment and said proximity; a liquid crystal display (“LCD”) comprising a static portion and a dynamic portion; a multiplexing LCD controller coupled to said dynamic portion; a static LCD controller coupled to said static portion; a direct current to direct current (“DC/DC”) converter coupled to said multiplexing LCD controller; a keypad processing unit coupled to said multiplexing LCD controller, said static LCD controller, and said DC/DC converter; and a power supply coupled to said DC/DC converter, to said keypad processing unit, to and said static LCD controller.