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    • 2. 发明授权
    • LED flashlight with battery life indicator
    • LED手电筒,带电池寿命指示灯
    • US08463565B1
    • 2013-06-11
    • US13336796
    • 2011-12-23
    • Ralph OsterhoutMichael J. KeatingAntony Van der Mude
    • Ralph OsterhoutMichael J. KeatingAntony Van der Mude
    • G01R31/36
    • F21L4/005H01M10/443H02J7/0047
    • A flashlight includes a light powered by a battery, and a circuit having: a memory for storing a battery life information and voltage output information versus time for the battery to power the light, a controller operating a count down timer to accumulate an amount of time that the battery powers the light, a voltage measure circuit for monitoring the voltage output by the battery while the battery powers the light and supply the voltage output to the controller. The controller determines: a first remaining battery life by comparing the accumulated time to the battery life, a second remaining battery life by comparing the voltage output to the voltage output information, and the lesser of the first and second remaining battery lives. The flashlight includes a display for receiving a command from the controller to display the lesser of the first remaining battery life and the second remaining battery life.
    • 手电筒包括由电池供电的光,以及电路,具有:存储器,用于存储电池寿命信息和电压输出信息对电池供电的时间,控制器操作倒计时定时器以累积一定时间量 电池为光源供电,一个电压测量电路,用于在电池供电并向控制器提供电压输出时监视电池输出的电压。 所述控制器通过将所述累积时间与所述电池寿命进行比较来确定第一剩余电池寿命,通过将所述电压输出与所述电压输出信息进行比较来计算第二剩余电池寿命,以及所述第一和第二剩余电池寿命中的较小者。 手电筒包括用于从控制器接收命令以显示第一剩余电池寿命和第二剩余电池寿命中的较小者的显示器。