| 摘要 |
<p>PURPOSE:To arbitrarily select a TV picture and a VTR picture with an easy operation by switching the input of a TV by a VTR reproduction detecting output and forcibly throughputting an antenna. CONSTITUTION:According to a VTR reproduction command, a detection signal outputted by a VTR reproduction detecting means 1 goes to H and is supplied to a TV input switching means 4 through a TV input switching signal transmission terminal 2. Simultaneously, the H output from the means 1 is supplied to a forced through put means 5 as well. A TV input switching is switched to the selection of an external signal input by the TV input switching means 4, a VTR reproduced picture is displayed on the TV and the antenna is forcibly throughputted through the means 5. By releasing a VTR reproduction command, the output of the means 1 is inverted to L and similarly, the input switching of the TV is switched from the selection of the external signal input to the selection of an internal signal input. According to this automatic switching, the TV picture and the VTR picture can be arbitrarily selected without a malfunction and with the simple operation.</p> |
