| 摘要 |
A portable radio frequency/channel display control system for use in a portable radio device or the like which is powered by a battery and of the type which includes a display for indicating the frequency/channel to which the radio is tuned. The system senses when a radio control is operated (such as the on/off switch, channel selector, etc.) and develops a control signal having a predetermined duration. The control signal causes the display to be energized for the predetermined duration and then the display is automatically de-energized. |
