发明名称 |
Device for displaying remaining electric energy of battery. |
摘要 |
<p>A display device has a time-constant circuit (7) and a switching element such as a transistor (Q7) for supplying the voltage of a battery (5) to the time-constant circuit (7) when a battery check key (4a) is pressed. A microcomputer (20) measures a time interval from a time when the voltage of the battery (5) starts being supplied to the time-constant circuit (7) to a time when a voltage of the time-constant circuit (7) reaches a predetermined value, and determines the remaining electric energy of the battery (5) from the measured time interval. The microcomputer (20) supplies data to a display unit (3) which then displays a progressively variable display mark combination representative of the determined remaining electric energy of the battery (5). <IMAGE></p> |
申请公布号 |
EP0514265(A2) |
申请公布日期 |
1992.11.19 |
申请号 |
EP19920401310 |
申请日期 |
1992.05.13 |
申请人 |
SONY CORPORATION |
发明人 |
INADA, MITSUHARU;OHGA, NORIO;TOMIDA, TAKASHI |
分类号 |
H01M10/48;G01R31/36;H04B1/16 |
主分类号 |
H01M10/48 |
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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