| 摘要 |
<p>PURPOSE:To confirm input data to make a more accurate input operation possible by displaying always cross information, which is stored in a memory, with a luminance element matrix. CONSTITUTION:Counter 6 is counted up each time oscillator 5 generates pulse 50, and the count value is decoded by decoder 7, and as the result, inverters 120-123 are turned on successively. Inverter outputs are input to memory 15 through OR gates 140-143. Then, pertinent X-axis data is always output as the output signal of memory 15 correspondingly to the scan period. Meanwhile, the output of selector 8 which is a memory address is given to decoder 11 also, and by the output, gates G0-G3 are turned on successively. As a result, power source voltage Vcc is applied to the Y-axis conductor. Since x and y axes of the LED are so arranged that they may correspond to X and Y axes of switches S00-S33 on the tablet, data stored in memory 15 lights the LED when a character is input on the tablet. By this lighting display, it can be confirmed the input is correct or not.</p> |
