Patent US5777399A successfully refreshed from Google Patents.
US5777399A
Expired / Lapsed
US
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Portable electronic apparatus and charge controlling method for portable electronic apparatus
Assignee: NEC Corp
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Filing: 1996-12-10
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Granted: 1998-07-07
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Expires: 2016-12-10
Abstract
Abstract Since means (control terminal a 16, control terminal b 17, control terminal c 18 and voltage detection terminal 22) for controlling portable electronic apparatus charger 2 directly from CPU 13 in the inside of portable electronic apparatus body 1 is provided, the circuit scale is reduced. Further, since means (power supply detection circuit 6, switch a 7, switch b 8 and regulator a 9) for supplying an electric current to CPU 13 to allow CPU 13 to operate with a signal from sub clock 11 even when the power supply to portable electronic apparatus body 1 is in an off state is provided, if portable electronic apparatus body 1 is connected to portable electronic apparatus charger 2, then CPU 13 and only a limited number of the other circuits in the inside of portable electronic apparatus body 1 are allowed to operate as a control circuit for portable electronic apparatus charger 2.
Inventors
- 👤 Toshiyuki Shibuya
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:57
CPC Classifications
H; H02; H02J; H02J7/00; H02J7/60; H02J7/663; H02J7/667; H02J7/865
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
232 words
A portable electronic apparatus having a portable electronic apparatus body, a rechargeable battery, a CPU, and a portable electronic apparatus charger for charging said battery; said portable electronic apparatus charger comprising quick charging means having a function of quickly charging said battery, and slow charging means having a function of slowly charging said battery, said portable electronic apparatus body comprising a power supply switch for switching on or off a connection from said battery to the entire circuitry of said portable electronic apparatus, connection detection means for detecting connection of said portable electronic apparatus body to said portable electronic apparatus charger, open/close detection means for detecting an on/off state of said power supply switch, and auxiliary power supply means for directly supplying an electric current from said battery to said CPU when said power supply switch is off while charging of said battery is proceeding, said CPU having a charge completion detection function of detecting a charged state of said battery from an output voltage of said battery, and a quick/slow switching controlling function of controlling said quick charging means to an on state and controlling said slow charging means to an off state when the charged state detected by said charge completion detection function is insufficient charge but controlling said quick charging means to an on state when the charged state detected by said charge completion detection function is sufficient charge.
Claim 2
Dependent Claim
232 words
A portable electronic apparatus having a portable electronic apparatus body, a rechargeable battery, a CPU, and a portable electronic apparatus charger for charging said battery; said portable electronic apparatus charger comprising quick charging means having a function of quickly charging said battery, and slow charging means having a function of slowly charging said battery, said portable electronic apparatus body comprising a power supply switch for switching on or off a connection from said battery to the entire circuitry of said portable electronic apparatus, connection detection means for detecting connection of said portable electronic apparatus body to said portable electronic apparatus charger, open/close detection means for detecting an on/off state of said power supply switch, and auxiliary power supply means for directly supplying an electric current from said battery to said CPU when said power supply switch is off while charging of said battery is proceeding, said CPU having a charge completion detection function of detecting a charged state of said battery from an output voltage of said battery, and a quick/slow switching controlling function of controlling said quick charging means to an on state and controlling said slow charging means to an off state when the charged state detected by said charge completion detection function is insufficient charge but controlling said quick charging means to an on state when the charged state detected by said charge completion detection function is sufficient charge.
Claim 3
Dependent Claim
61 words
A portable electronic apparatus as claimed in claim 1, wherein said slow charging means includes two slow charging circuits having different output electric current values, and said CPU having a controlling function for switching said two slow charging circuits in response to an on or off state of said power supply switch detected by said open/close detection means upon slow charging.
Claim 4
Dependent Claim
108 words
A charge controlling method for the portable electronic apparatus as claimed in claim 1, comprising the steps of detecting connection of said portable electronic apparatus to said portable electronic apparatus charger, detecting an on/off state of said power supply switch and turning off said auxiliary power supply means when said power supply switch is on but turning on said auxiliary power supply means when said power supply switch is off, turning on said quick charging means, detecting a charged state of said battery, and turning off said quick charging means and turning on said slow charging means when the charged state of said battery reaches a predetermined value.
Claim 5
Dependent Claim
123 words
A charge controlling method for the portable electronic apparatus as claimed in claim 2, comprising the steps of detecting connection of said portable electronic apparatus to said portable electronic apparatus charger, detecting an on/off state of said power supply switch and turning off said auxiliary power supply means when said power supply switch is on but turning on said auxiliary power supply means when said power supply switch is off, turning on said quick charging means, detecting a charged state of said battery, and turning off said quick charging means when the charged state of said battery reaches a predetermined value and turning on a predetermined one of said slow charging circuits in response to an on/off state of said power supply switch.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2001-07-06 | 2002-01-05 | 2002-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-07-06 | 2006-01-05 | 2006-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-07-06 | 2010-01-05 | 2010-07-07 | $7700.00 | Window Closed / Lapsed |