| 摘要 |
PURPOSE:To adjust the display density of a display device automatically by converting the moving position or direction of a telephone set into a resistance and discriminating the position or direction depending on the resistance. CONSTITUTION:When a telephone set is installed, a movable contact 1 is moved in the direction of gravity and goes to a standstill and an inherent resistance is shown with a fixed contact 2. In this case, a guide bar 3 guides the movable contact 1 so that the movable contact 1 has a stable and accurate inherent resistance with the fixed contact 2. When a telephone set is moved, the movable contact 1 is moved and a specific resistance is inputted to a delay circuit 5. On the other hand, since power is supplied to an LCD display device through a delay circuit 5 from a power supply circuit 7, the display density of the LCD display device 6 is adjusted automatically by the change in the inherent resistance.
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