EP0504007A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Battery powered unit
Assignee: Fujitsu Ltd
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Filing: 1992-03-03
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Granted: —
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Expires: 2012-03-03
Abstract
Abstract A battery powered unit is driven by an output voltage of a battery (10) when the power is ON, and includes a voltage detection circuit (11, 134) for detecting the output voltage of the battery, a judging circuit (12, 20, 130) for judging whether or not a remaining capacity of the battery is greater than a predetermined value based on an output detection signal of the voltage detection circuit, and a control circuit (13, 20, 35, 130, 136) for carrying out a resume process only if the judging circuit judges that the remaining capacity of the battery is greater than the predetermined value when the power is turned ON. The resume process returns a state of the battery powered unit to a state at a time when the power was previously turned OFF.
Inventors
- 👤 Hideyuki c/o Fujitsu Limited Tayama
- 👤 Noriaki c/o Fujitsu Limited Yamagishi
- 👤 c/o Fujitsu Limited Yamamoto. Shinji
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-27 14:58
CPC Classifications
G; G06; G06F; G06F1/00; G06F1/26; G06F1/30
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
160 words
A battery powered unit which is driven by an output voltage of a battery (10) when the power is ON, characterized in that said battery powered unit comprises: voltage detection means (11, 134) for detecting the output voltage of the battery (10) and for outputting a detection signal indicative of the detected voltage; judging means (12, 20, 130), coupled to said voltage detection means, for judging whether or not a remaining capacity of the battery is greater than a predetermined value based on the detection signal output from said voltage detection means; and control means (13, 20, 35, 130, 136), coupled to said judging means, for carrying out a resume process only if said judging means judges that the remaining capacity of the battery is greater than the predetermined value when the power is turned ON, said resume process returning a state of the battery powered unit to a state at a time when the power was previously turned OFF.
Claim 2
Dependent Claim
45 words
The battery powered unit as claimed in claim 1, characterized in that said voltage detection means (11, 134) includes an analog-to-digital converter (110) which converts the output voltage of the battery (10) into a digital value and outputs the digital value as the detection signal.
Claim 3
Dependent Claim
50 words
The battery powered unit as claimed in claim 1, characterized in that said voltage detection means (11, 134) includes a comparator (111) which compares the output voltage of the battery (10) with a reference voltage and outputs a signal indicative of a result of the comparison as the detection signal.
Claim 4
Dependent Claim
60 words
The battery powered unit as claimed in any of claims 1 to 3, characterized in that said judging means (12, 20, 130) judges whether or not the remaining capacity of the battery (10) is greater than the predetermined value by judging whether or not the voltage detected by said voltage detection means (11, 134) is greater than a predetermined voltage.
Claim 5
Dependent Claim
61 words
The battery powered unit as claimed in any of claims 1 to 4, characterized in that said control means (13, 20, 35) controls the battery powered unit in a standby state if said judging means (12, 20) judges that the remaining capacity of the battery (10) is less than or equal to the predetermined value when the power is turned ON.
Claim 6
Dependent Claim
63 words
The battery powered unit as claimed in any of claims 1 to 5, characterized in that said control means (13, 20, 35, 130, 136) includes suspend process means (13, 20, 130) for carrying out a suspend process when the power of the battery powered unit is turned OFF, said suspend process storing predetermined information at the time when the power is turned OFF.
Claim 7
Dependent Claim
28 words
The battery powered unit as claimed in claim 6, characterized in that said control means (13, 20, 130) reads and restores the predetermined information during the resume process.
Claim 8
Dependent Claim
25 words
The battery powered unit as claimed in claim 7, characterized in that the predetermined information is related to the state of the battery powered unit.
Claim 9
Dependent Claim
79 words
The battery powered unit as claimed in any of claims 1 to 4, characterized in that said voltage detection means (134) detects the output voltage of the battery (10) when the power of the battery powered unit is turned ON, and said control means (130, 136) includes means (136) for immediately cutting off the supply of power if said judging means (130) judges that the remaining capacity of the battery is less than or equal to the predetermined value.
Claim 10
Dependent Claim
209 words
A battery powered unit which is driven by an output voltage of a battery (10) when the power is ON, characterized in that said battery powered unit comprises: voltage detection means (134) for detecting the output voltage of the battery (10) when the power is turned ON and for outputting a detection signal indicative of the detected voltage; judging means (136), coupled to said voltage detection means, for judging whether or not a remaining capacity of the battery is greater than a predetermined value based on the detection signal output from said voltage detection means; resume process means (130) for carrying out a resume process when the power is turned ON, said resume process returning a state of the battery powered unit to a state at a time when the power was previously turned OFF; and control means (136), coupled to said judging means, for supplying the output voltage of the battery to drive the battery powered unit if said judging means judges that the remaining capacity of the battery is greater than the predetermined value and for prohibiting the supply of the output voltage of the battery if said judging means judges that the remaining capacity of the battery is less than or equal to the predetermined value.
Claim 11
Dependent Claim
44 words
The battery powered unit as claimed in claim 10, characterized in that said voltage detection means (134) includes an analog-to-digital converter (110) which converts the output voltage of the battery (10) into a digital value and outputs the digital value as the detection signal.
Claim 12
Dependent Claim
49 words
The battery powered unit as claimed in claim 10, characterized in that said voltage detection means (134) includes a comparator (111) which compares the output voltage of the battery (10) with a reference voltage and outputs a signal indicative of a result of the comparison as the detection signal.
Claim 13
Dependent Claim
57 words
The battery powered unit as claimed in any of claims 10 to 12, characterized in that said judging means (136) judges whether or not the remaining capacity of the battery (10) is greater than the predetermined value by judging whether or not the voltage detected by said voltage detection means (134) is greater than a predetermined voltage.
Claim 14
Dependent Claim
56 words
The battery powered unit as claimed in any of claims 10 to 13, characterized in that there is further provided suspend process means (130) for carrying out a suspend process when the power of the battery powered unit is turned OFF, said suspend process storing predetermined information at the time when the power is turned OFF.
Claim 15
Dependent Claim
27 words
The battery powered unit as claimed in claim 14, characterized in that said resume process means (130) reads and restores the predetermined information during the resume process.
Claim 16
Dependent Claim
27 words
The battery powered unit as claimed in claim 14 or 15, characterized in that the predetermined information is related to the state of the battery powered unit.
References Cited (Backward Citations)
No citation records indexed.
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