A method of utilizing color photoresist to form black matrix and spacers on a control circuit substrate is described. Utilizing the character of the red and the blue photoresist having a non-overlapping transmittance region in the visible light region, a black matrixes consisting of overlapping red and blue photoresist on control devices are used to prevent the photo current occurring in the off state of the control devices. In addition, three different color photoresist plus another-color photoresist are overlapped to form spacers on metal lines.