A cooling system to be mounted in a hybrid vehicle including a motor driven and a generator includes a cooling path and a pressurizing unit. Each of the pipetting units are independently movable in Y and Z directions and includes an upper and a lower frame. At least one resin color filter layer is formed on the pixel regions to cover the switching element. Thus the device avoids undesired bubble formation during the filling process, and undesired material break off during use can be largely excluded.