Abstract: The present invention provides a guide light plate touch device using imaging unit includes a guide light plate, a light source, an imaging unit, a photosensitive component and a microprocessor. The microprocessor detects the image information output by the photosensitive component, obtains coordinate information of the touch position, and outputs a corresponding control signal according to position information of at least a touch image of the object contacting the operation zone. Hence, the light being utilized to conduct total internal reflection propagation in the guide light plate to perform touch control function leads to much less components being required for the touch device with substantial savings of the fabricating cost.

Abstract: A guide light plate optical touch device comprises a guide light plate, an image capturing unit, an optical signal emitting unit, a microprocessor, and an optical signal processing unit; when the guide light plate is touched, at least two lights passing though the touch point carry newly generated low frequency vibration signals or further generate FTIR signals such that the optical signal processing unit obtains at least two unusual signal values; then the microprocessor detects the signal values sequentially output by the optical signal processing unit in a period and obtains the location information of the touch point based on the time points appearing in the period with respect to the two unusual signal values so as to output a corresponding touch signal.