Electronic device for detecting erronous key selection entry

摘要

An electronic device detects erroneous key selection entries or inaccurate actuation of a keypad. The device has a keypad with aligned keys. Each of the keys is partitioned into two sensor sub regions. A first one of the sub-regions includes at least a first sensor and a second one of the sub-regions includes a second sensor. A processor with a keypad sensor inputs is selectively coupled to the first and second sensors of each of the sub-regions. The second sensor of the first key and a proximal first sensor of an adjacent second key are coupled to a common keypad sensor input to provide indistinguishable sub-regions of adjacent keys. The processor is programmed to detect an erroneous key selection entry when only a key actuation signal is provided from the common keypad sensor.

主权项

1. An electronic device, comprising:
a keypad having a plurality of aligned keys, each of the keys being partitioned into two sensor sub regions, wherein a first one of the sub-regions includes at least one first sensor and a second one of the sub-regions includes at least one second sensor; and a processor with a plurality of keypad sensor inputs selectively coupled to the first sensor and second sensor of each of the sub regions, wherein the processor is programmed to detect an erroneous key selection entry when key actuation signals are generated concurrently from a second sensor of a first key and a proximal first sensor of an adjacent second key, and wherein the processor is further programmed so that in use, when the processor concurrently receives exactly two actuation signals, a valid key selection entry is detected only when the processor identifies the key actuation signals as being sent from at least one first sensor and at least one second sensor of the same key.