Patent ID: 8477117

Claim:
An embedded optical induction input device, comprising: a plurality of induction input units arranged in array, each of said respective induction input units includes: at least a light sensing circuit generating an induction current signal based on intensity of light irradiation received; a conversion circuit, including a first transistor and a second transistor connected to each other, said first transistor and said second transistor are connected to said light sensing circuit, and converts said induction current signal into an induction voltage signal based on the first transistor and the second transistor alternative switching in turn; four bias lines, namely, a first bias line, a second bias line, a third bias line, and a four bias line; a drain of said first transistor is connected to said first bias line; a gate of said first transistor is connected to said third bias lines; a source of said first transistor is connected to a source of said second transistor; a drain of said second transistor is connected to said second bias line; and a gate of said second transistor is connected to said fourth bias line, wherein said first bias line and said fourth bias line are used to receive voltage signals of the same phase but different levels, thus said voltage signals on said second bias line and said third bias line are of the same phase but different levels, wherein, said sources of said first transistor and said second transistor are connected to said light sensing circuit.