Communications: electrical – Condition responsive indicating system – Specific condition
Patent
1993-12-06
1995-06-13
Peng, John K.
Communications: electrical
Condition responsive indicating system
Specific condition
324426, 324433, 320 48, G08B 2100
Patent
active
054247225
ABSTRACT:
A display device has a time-constant circuit and a switching element such as a transistor for supplying the voltage of a battery to the time-constant circuit when a battery check key is pressed. A microcomputer measures a time interval from a time when the voltage of the battery starts being supplied to the time-constant circuit to a time when a voltage of the time-constant circuit reaches a predetermined value, and determines the remaining electric energy of the battery from the measured time interval. The microcomputer supplies data to a display unit which then displays a progressively variable display mark combination representative of the determined remaining electric energy of the battery.
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Patemt Abstracts of Japan, vol. 11, No. 68, Feb. 28, 1987.
Inada Mitsuharu
Ohga Norio
Tomida Takashi
Kananen Ronald P.
Lefkowitz Edward
Peng John K.
Sony Corporation
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