Patent ID: 8289194
Filing Date: 2012-10-16
Classification: G06F,H03K

Abstract:
1. A key assembly for an electronic device, comprising: a depressable touching portion; and a detecting unit covered by the touching portion, the detecting unit comprising a power source, a first detector, a second detector, a processor, a first resistor layer, and a second resistor layer parallel spaced from the first resistor layer, the first detector and the second detector being positioned at respective sides of the first resistor layer for obtaining a pair of currents flowing therethrough, the first resistor layer comprising a first end and a second end opposite to the first end, the second resistor layer comprising a third end and a fourth end opposite to the third end, the first end facing the third end, and the second end facing the fourth end, the first end being connected to a first electrode of the power source via the first detector, the fourth end being connected to the first electrode of the power source via the second detector, the second end and the third end being connected to a second electrode of the power source, the processor being electrically connected to the first detector and the second detector, and being configured for performing a predetermined function of the electronic device in response to one of the plurality of variations of the pair of currents outputted from the first detector and the second detector.