A touch screen driver that can be used with a resistive touch screen includes an inputoutput module that supplies at least one input signal to at least one of a plurality of inputoutput ports of the touch screen and that generates at least one output signal, in response to the at least one input signal, and in accordance with at least one control signal. The display module has a polarizer. The spectral filter assembly permits a very high degree of elastically scattered light rejection and excellent stray-light reduction and management, while permitting a high level of optical throughput to maximize the signal of the weakly scattered Raman signal.