Keyboard encoding system actuated by opening and closing of keyboard cover

摘要

A cover-actuated keyboard encoding system is disclosed which can be used either alone or as a part of a universal remote control unit. It contains (a) a keyboard; (b) a memory for storing a plurality of control codes; (c) a special keyboard cover for covering the first keyboard; and (d) a computer program to convert the covered keys of the first keyboard into a control code. The keyboard cover is designed such that it contains one or more key-seat protrusions which are arranged such that they will be pressing against one or more of the first keys when the keyboard cover is closed. A CPU is programmed to scan the key board and convert the scanned keyboard value to a control code, in accordance with the number and locations of the keys that are being pressed during a power-on or a reset. This control code can be utilized as an initial code for identifying the brand and product type of the appliance to controlled by the universal remote control unit, thus allowing the universal remote control unit to operate as a conventional remote controller. The CPU can be further programmed to modify at least a portion of the initial control code if it detects that a universal key is pressed.