| 摘要 |
<p>An information display device is provided with: a display unit for displaying an image on the basis of display information and a predetermined driving voltage; a CPU (50) for setting the voltage boosting target value of driving voltage of the display unit; a voltage division resistance circuit (23) for dividing power supply voltage to generate driving voltage output candidates having a plurality of output values; a selector (24) for selecting the output values in order from the lowest rank to the highest rank of the driving voltage output candidates of the voltage division resistance circuit on the basis of tap selection signals (SS1-SS5) and boosting the driving voltage; and a slow starter (25) for comparing the voltage boosting target value set by the CPU and the output value of the driving voltage boosted by the selector, determining whether or not the output value of the driving voltage has reached the voltage boosting target value, and driving the display unit at the driving voltage that is based on the result of the determination and has reached the voltage boosting target value. Consequently, the display unit can be started without depending on a voltage boosting circuit configured by hardware, and the overall circuit size can be reduced.</p> |
