| 摘要 |
<p>PURPOSE:To always obtain a good display irrespective a seeing angle and a position of a display body by changing automatically a driving voltage of a liquid crystal display body in relation to a handwriting mode and state/position information of a position of a pen, etc. on the display body. CONSTITUTION:A liquid crystal display body 7 is superposed on a tablet circuit 2, and when the surface of said liquid crystal display body 7 is touched with a handwriting input pen 1, its touch position is sensed by the tablet circuit 2, and sent an XY coordinate data to a CPU 3. The CPU 3 send a control signal to an automatic adjusting part 4 based on said XY coordinate data. The automatic adjusting part 4 is constituted of a variable resistor, and controls a voltage of a voltage generating part of a liquid crystal display body driving circuit 5 by changing its resistance value in accordance with the control signal of the CPU 3. In such a way, the driving voltage is adjusted automatically so that a contrast of the liquid crystal display body always becomes visible easily by a decision of the CPU 3.</p> |
