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    • 2. 发明授权
    • System connecting power supply line to image sensing device upon data transport
    • 在数据传输时将电源线连接到图像传感装置
    • US06580460B1
    • 2003-06-17
    • US09030767
    • 1998-02-26
    • Kenji TakahashiHisashi IshikawaHiroshi TajikaMiyuki FujitaYuji KonnoHirowo InoueNorihiro Kawatoko
    • Kenji TakahashiHisashi IshikawaHiroshi TajikaMiyuki FujitaYuji KonnoHirowo InoueNorihiro Kawatoko
    • H04N5225
    • H04N1/00885H04N1/00891H04N1/00899H04N1/00901H04N1/00904
    • According to the invention, a power supply for an image sensing device is obtained from a printer to prevent consumption of the battery. When the image sensing device is connected to the printer, a power management unit checks if electric power can be supplied from the printer. When electric power can be supplied from the printer, the power management unit switches the power supply from the battery to a power supply receiving/supplying unit that receives electric power from the printer. In this case, if the remaining capacity on the battery is small, the battery is charged by electric power from the printer. Also, the luminance of a display unit is increased, or the operation frequency of a control unit is raised. On the other hand, when electric power cannot be supplied from the printer, the power management unit switches the power supply to the battery. In this case, the power management unit reduces consumption power by decreasing the luminance of the display unit or reducing the operation frequency of the control unit.
    • 根据本发明,从打印机获得用于图像感测装置的电源,以防止电池消耗。 当图像感测装置连接到打印机时,电源管理单元检查是否可以从打印机提供电力。 当从打印机供电时,电源管理单元将电池的电源切换到从打印机接收电力的电源接收/供给单元。 在这种情况下,如果电池的剩余容量小,则通过来自打印机的电力对电池进行充电。 此外,显示单元的亮度增加,或控制单元的操作频率升高。 另一方面,当不能从打印机供电时,电源管理单元将电源切换到电池。 在这种情况下,电源管理单元通过降低显示单元的亮度或降低控制单元的操作频率来降低​​功耗。