| 摘要 |
<p>PURPOSE: To enable satisfactory display over a long period, while allowing a battery to be operated with a predetermined charging state of a device by a method, wherein a charging/discharging current applied to a control circuit is controlled in accordance with the monitored state of the battery. CONSTITUTION: A voltage between both the terminals of a resistance element 359 and the voltage of a battery 353 are supplied to the AD converter input of a battery controller 355. Therefore, the charging/discharging current of the battery 353 is measured as a voltage between the both terminals of the resistance element 359 and processed digitally, and the voltage of the battery 353 is processed digitally. A control circuit 354 includes a large current circuit consisting of transistors 381 and 382 and elements related to them and is driven by a drive circuit 385, in accordance with a control signal supplied from the battery controller 355 through a bus 360. As a result, the accurate discharging/ charging is monitored and controlled, the charging state of the battery is reflected accurately and the satisfactory display over a long period, while the battery operating with the predetermined charging state is obtained.</p> |
