| 摘要 |
PURPOSE:To enable to keep display until the button is released, by making channel selection through the continuous depression of selection button without displaying the sound volume on the received screen when channel is selected with remote control and by displaying superimposingly on the picture of channel. CONSTITUTION:The remote control signal 20 for sound tuning is detected 11, the signal 35 is picked up with the contact 35 of the sound volume 44 and the transistor 45 is turned on at the threshold value more than 36. The channel reset signal 19 from the pulse code judgement control circuit is picked up (e) with the point 25 and the transistor Tr50 is turned on at the threshold value 41. Since the signal 19 is transmitted after the pulse code 32 of remote control is judged as channel selection operation, the time 39 enables to inhibit sound volume display with the signal 25. Thus, the capacitor 44 is selected so that the signal 35 can exceeds the threshold value 36. The sound volume is continuously displayed during the period 38 after remote control operation and display is finished at the period 40. The signals 24 to 26 are passed through the negative logic circuit of Tr48 to 50 and 58 and the output 51 of Tr 50 is displayed on the receiving tube 15. With this constitutuion, sound volume display can be made only with volume operation. |
