| 摘要 |
PROBLEM TO BE SOLVED: To prevent deterioration in image quality due to a video signal by providing a means that isolates electromagnetically a 1st signal line and a 2nd signal line between the 1st signal line supplying a 1st signal and the 2nd signal line supplying a 2nd signal. SOLUTION: Video data from a decoder are fed to an external video input terminal 33 provided to a printed circuit board. The video data from the decoder is introduced to the other side of the printed circuit board via a video signal line 34, a coupling capacitor CO and a video signal line 35. The video signal lines 34, 35 correspond to a 1st signal line. Furthermore, a detection signal line 36 that is used to supply a video signal from a tuner section is wired. This detection signal line 36 corresponds to a 2nd signal line. Then an earth pattern that is an electromagnetic isolation between is placed between the detection signal line 36 and the components such as the video signal lines 34, 35 and the coupling capacitor CO to prevent noise production.
|
