the disclosure can be varied by using the parallel electrodes furthermore the control methods of the voltage controlled unit can be tuned with the input at the same time this type of structure also improves the non uniformity of the electrical field in the corner in addition it decreases the operating power consumption because of the reduction of the voltage distributed in the conductive layer touch area please refer to fig6 which shows the specific embodiment of fabrication of resistance r 1 in the disclosure the resistance r 1 can be fabricated by means of a l shaped electrode and formed by the gaps between l shaped electrode and parallel electrodes yu 0 yd 0 xr 0 and xl 0 that is the gaps between l shaped electrode and parallel electrodes constitute the conductive layer which can be resistance r 1 the resistance value can be calculated by the width length and electric conductivity of the conductive layer the fundamental formula is r u03c1l a where r is the resistance value u03c1 is the electric conductivity a is the cross section area and l is the length furthermore the l shaped electrode also can be fabricated in the same manner with parallel electrodes that is using the same material and process for example it may be formed on the conductive layer by means of screen printing using unleaded silver paste at a high temperature the l shaped electrode welded on the transparent conductive layer with silver paste at a temperature above 500 u00b0 results in an extremely.