4-camera optical ten point touch frame is a new touch product designed for large-scale flat panel display. Its frame structure is simple and detachable, and its size can be customized according to the mainstream size. It will not produce bad inventory due to the large display area every year. Its camera module is composed of high-resolution infrared CMOS image sensor and wide-angle HD micro lens. Because of the use of four camera modules, which are distributed in four corners of the touch frame, it achieves the excellent performance of full area writing without dead area and multi touch without ghost point.