Patent attributes
A compact keypad structure includes a keypad panel with a smooth face, matted face or patterned layer. The keypad structure includes a flexible printed circuit board, an illumination layer, a resilient layer and a keypad layer in bottom-up order. The illumination layer includes an illumination plate to illuminate the bottom of the resilient body when the keypad is operated. Therefore, the surface of the keypad has a transparent effect for display. The first carrier and the second carrier of the keypad layer, and the resilient body of the resilient layer are deformed when an external force is applied to the surface of the keypad. A protrusion is pressed against the surface of the illumination plate and a metal dome on another face of the illumination plate is deformed and pressed against the flexible printed circuit board. The metal dome is in contact with a contact of the flexible printed circuit board to output an operation signal.
