A flat-type display device is provided. Alternatively, a thin film device includes a metal sulfide layer formed on a single crystal silicon substrate by epitaxial growth; and at least two compound thin films with ionic bonding, which are formed on the metal sulfide layer by epitaxial growth. In the first operating mode images acquired by the sensor are output. The proposed configuration significantly enhances the AC test coverage for a scan chain having adjacent SRLs feeding the same cone of logic by adding a simple logic circuit such as an XOR gate between the adjacent SRLs. A fixed latch disposed on the first surface mates with the retaining hole so as to lock the transceiver module in the cage.