发明名称 |
Pulsewidth modulated visual indicator for battery status |
摘要 |
A battery status indication circuit and a method of indicating battery status. The battery status indication circuit comprises: (1) an indicator having an inactive state and an active state and (2) an indicator modulation circuit adapted to receive a charge level signal indicating a charge level of a battery and transmit, in response thereto, a pulsewidth modulated indicator signal to the indicator, a duty cycle of the indicator signal being a function of the charge level, the indicator thereby toggling between the inactive and active states to provide an indication of the charge level. A single indicator having only two states can therefore be employed to indicate multiple grades of battery charge level.
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申请公布号 |
US5629605(A) |
申请公布日期 |
1997.05.13 |
申请号 |
US19950378127 |
申请日期 |
1995.01.24 |
申请人 |
DELL USA, L.P. |
发明人 |
LAVAN, THOMAS J.;GANDRE, JERRY D. |
分类号 |
G01R31/36;H02J7/00;(IPC1-7):H01M10/44;H01M10/46;H01M10/48 |
主分类号 |
G01R31/36 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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