Patent ID: 8212161
Filing Date: 2012-07-03
Classification: G06F,H04M

Abstract:
1. A keypad assembly for electronic device, comprising: a PCB; a light guiding board disposed on the PCB; a panel disposed on the light guiding board; a plurality of key panel portions made of transparent material and set in the panel, the key panel portions arranged in a plurality of columns; a lighting device disposed on the PCB; and a sensing device disposed on the PCB, the sensing device including a plurality of sensors arranged in a plurality of columns; wherein the columns of the key panel portions alternate with the columns of the sensors; and when an object touches or slides on/above an outside surface of one of the key panel portions, the intensity of light sensed by the sensing device changes and thereby causes current generated by ones of the sensors proximate to the key panel portion to be changed, thus the sensing device generates a signal to complete a corresponding information input.