| 摘要 |
PURPOSE: To easily confirm a currently selected RF input terminal and its related search list by displaying the channel numbers of search lists in different colors. CONSTITUTION: An on-screen display processing circuit 140 generates a message signal in a first color when the first radio-frequency(RF) input terminal of a RF switch 100 is selected or in a second color when the second RF input terminal of the switch 100 is selected. The circuit 140 then displays the message on a display device 158 by inputting the message signal to the second input of a video signal processing circuit 155. Therefore, a viewer can easily know a currently selected RF input terminal A, B, or C and its related search list, because the channel numbers of search lists are displayed in different colors. |
