Patent ID: 7800586
Filing Date: 2010-09-21
Classification: H01H,H03K,H03M

Abstract:
1. A data input device, comprising: first, second, third and fourth terminals; plural keys, said keys being arranged in at least two rows; a first ohmic resistor, a first end of said first ohmic resistor forming the third terminal of the data input device and a second, opposite, end of said first ohmic resistor forming the fourth terminal of the data input device; and a plurality of unidirectional position detectors, each unidirectional position detector being associated with one of said at least two rows of keys, respectively, each of the plurality of unidirectional position detectors including the output connections of each of the plurality of unidirectional position detectors are connected to said first ohmic resistor at different locations between said first and second ends of said first ohmic resistor, and the first input connections of each of the plurality of unidirectional position detectors are connected together to form said first terminal of the data input device and the second input connections are connected together to form said second terminal of the data input device.