Patent ID: 7946726

Claim:
An input device capable of enhancing symbol readability for an electronic product comprising: a plurality of keypads for displaying a plurality of first kind symbols and a plurality of second kind symbols; a detection unit for detecting an operation mode of the electronic device; and a control unit coupled to the detection unit and the plurality of keypads for controlling the plurality of keypads to display the plurality of first kind symbols or the plurality of second kind symbols according to a detection result of the detection unit; wherein one of the plurality of keypads comprises: a substrate; a first light-emitting device deployed on the substrate and coupled to the control unit for generating a first colored light source; a second light-emitting device deployed on the substrate and coupled to the control unit for generating a second colored light source different from the first colored light source; a first transparent board made of a translucent material of a first color for displaying a first symbol, and deployed on the first light-emitting device and the second light-emitting device; a second transparent board made of a translucent material of a second color for displaying a second symbol, and deployed on the first light-emitting device and the second light-emitting device; and a transparent film deployed on the first transparent board and the second transparent board; wherein the first color is a complementary color to the first colored light source, and the second color is a complementary color to the second colored light source.