The paper presents the application of the LCD modeling and optimization system for the design and development of the new fast response TN LCD configuration. This switch means in this work the set-up: thin transmissive TN display and detector, which gives the answer for the light impulse passing the display. The analysis was done for different polarizing films, light wavelength and for chosen set of director profile function. As a results the switching characteristics calculated for given set of director profile function were obtained.