A flexible circuit board includes a base substrate, a driving chip, an input transmission line, an output transmission line and a connecting transmission line. The input device has a number of connectors for connection of peripherals to the input device. The graphics processing unit is operative to compress at least a portion of the generated Z data, to write the compressed portion of Z data to the depth buffer via the depth buffer interface in a compressed format, to read portions of compressed Z data from the depth buffer via the depth buffer interface, and to decompress the compressed Z data read from the buffer. The selected page includes the currently selected one of the features. As a result, the ESD protection circuit can have greater discharge capacity. To improve the accuracy of determining the position it is proposed to provide a transponder on the implant suitable for determining the position.