US4001808A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electronic device for monitoring power consumption of an electro-optical display
Assignee: Citizen Watch Co Ltd
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Filing: 1975-06-25
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Granted: 1977-01-04
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Expires: 1995-06-25
Abstract
Abstract An electronic device for use with a battery driven electro-optical display, wherein the device includes circuitry for detecting an increase in the rate of electric power consumption of the display, and generates a signal upon detecting the increase. The device includes an alarm which operates, when the signal is received and includes circuitry, which stops power supply to the display when the signal is received. Surplus power consumption of the electric cell is thereby eliminated.
Inventors
- 👤 Heihachiro Ebihara
- 👤 Fukuo Sekiya
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:38
CPC Classifications
G; G09; G09G; G09G3/00; G09G3/04; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/13306; G04; G04C; G04C10/00; G04C10/04; G06; G06F; G06F1/00; G06F1/26; G06F1/28
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
102 words
An electronic device for use with electronic appliances, wherein said appliances include a battery cell for supplying electric power, a reference signal generator for generating a reference signal, logic circuitry responsive to said reference signal for supplying an operating signal for driving said display device, wherein said device comprises: a detection circuit disposed between said battery cell and said driving circuit; means within said detection circuit for monitoring power consumption of said driving circuit and thereby measuring the power consumption of said display device; means within said detection circuit for generating a detection signal, when the power consumption exceeds a predetermined level.
Claim 2
Dependent Claim
102 words
An electronic device for use with electronic appliances, wherein said appliances include a battery cell for supplying electric power, a reference signal generator for generating a reference signal, logic circuitry responsive to said reference signal for supplying an operating signal for driving said display device, wherein said device comprises: a detection circuit disposed between said battery cell and said driving circuit; means within said detection circuit for monitoring power consumption of said driving circuit and thereby measuring the power consumption of said display device; means within said detection circuit for generating a detection signal, when the power consumption exceeds a predetermined level.
Claim 3
Dependent Claim
23 words
An electronic device, as defined in claim 1, which further includes means for generating an alarm by altering the indication of said display.
Claim 4
Dependent Claim
26 words
An electronic device as defined in claim 1 which further comprises means for interrupting the electric power supplied to at least a part of said display.
Claim 5
Dependent Claim
35 words
An electronic device, as defined in claim 1, wherein said detecting circuit includes a resistor disposed between said battery and said energizing circuit for causing a voltage corresponding to the power consumption in said display.
Claim 6
Dependent Claim
36 words
An electronic device, as defined in claim 4 further including a Metal-Oxide-Semiconductor transistor connected to said detection circuit for connecting both ends of said resistor, when turned on by the detection signal from said detecting circuit.
Claim 7
Dependent Claim
42 words
An electronic device, as defined in claim 5, wherein said detecting circuit includes means for intermittently monitoring the power consumption in said display, a memory for storing the result of monitoring by said detecting means, and means for intermittently clearing said memory.
Claim 8
Dependent Claim
18 words
An electronic device as defined in claim 1 wherein said electro-optical display comprises a liquid crystal display element.
Claim 9
Dependent Claim
36 words
An electronic device, as defined in claim 7, wherein said means for interrupting electric power includes means for supplying signals to all of the electrodes of said display, which are equal in voltage, phase and frequency.
Claim 10
Dependent Claim
35 words
An electronic device, as defined in claim 7, wherein said means for interrupting electric power includes means for supplying signals to the selected electrodes of said display, which are equal in voltage, phase and frequency.
Claim 11
Dependent Claim
22 words
The electronic device of claim 1 further comprising: means for generating an alarm signal, in response to generation of said detection signal.
Claim 12
Dependent Claim
27 words
An electronic device as defined in claim 10 wherein said alarm generating means includes means for generating a signal for indicating a specified pattern on said display.
Claim 13
Dependent Claim
18 words
The electronic device of claim 10, wherein the display includes means for indicating generation of the alarm signal.
Claim 14
Dependent Claim
25 words
The electronic device of claim 3, wherein said means for interrupting the power consumption continues to function, as long as the detection signal is generated.
Claim 15
Dependent Claim
12 words
The electronic device of claim 1, wherein the appliance is a timepiece.
Claim 16
Dependent Claim
13 words
The electronic device of claim 1, wherein the appliance is an electronic calculator.
Claim 17
Dependent Claim
12 words
The electronic device of claim 13, wherein the appliance is a timepiece.
Claim 18
Dependent Claim
12 words
The electronic device of claim 13, wherein the appliance is a calculator.
References Cited (Backward Citations)
US3898790A
Cited
US3943500A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-01-04 | 1980-07-05 | 1981-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-01-04 | 1984-07-05 | 1985-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-01-04 | 1988-07-05 | 1989-01-04 | $7700.00 | Window Closed / Lapsed |