US6516418B1
Expired / Lapsed
US
⏱️ 0.0 years remaining
Portable computer having universal serial bus ports controlled power supply and a method of the same
Assignee: Samsung Electronics Co Ltd
•
Filing: 1999-07-23
•
Granted: 2003-02-04
•
Expires: 2019-07-23
Abstract
Abstract A portable computer system with universal serial bus (USB) port or ports and a method for controlling power of the universal serial bus (USB) port is described. When the main power of the portable computer system is supplied from a battery rather than an alternating current (AC) adapter, the power of the universal serial bus (USB) port is automatically shut down. In addition, the power of the universal serial bus (USB ) port is completely shut down while the universal serial bus (USB) port is not used in response to a setting state of the universal serial bus (USB) port, thereby reducing unnecessary power consumption. Further, when an over-current is detected from the alternating current (AC) adapter or the battery, the power of the universal serial bus (USB) port is shut down, whereby damage to peripheral devices coupled to the universal serial bus (USB) port can be prevented.
Inventors
- 👤 Byeong-Chang Lee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 00:59
CPC Classifications
G; G06; G06F; G06F1/00; G06F1/26; G06F1/32; G06F1/3203; G06F1/3234; G06F1/325; G06F1/3253; G06F13/00; Y; Y02; Y02D; Y02D10/00
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
227 words
A portable computer system, comprising: a universal serial bus (USB) port that is selectively supplied power from any one of an alternating current (AC) adapter and a battery; detection means for detecting whether the alternating current (AC) adapter is connected to the portable computer system to supply power and generating a detection signal indicating a detected result as to whether the alternating current (AC) adapter is connected to the portable computer system to supply power; storing means for storing one of enabled state and a disabled state as a state of the universal serial bus (USB) port; over-current detection means for any one of generating an over-current detection signal and shutting down power supplied to the universal serial bus (USB) port when detecting an over-current from any one of the alternating current (AC) adapter and the battery; control means for generating a first control signal in response to the detection signal and the state of the universal serial bus (USB) port and generating a second control signal in response to the over-current detection signal, so as to selectively supply power and shut down power supplied to the universal serial bus (USB) port; and switching means for selectively supplying power and shutting down the power supplied to the universal serial bus (USB) port in response to any one of the first control signal and the second control signal.
Claim 2
Dependent Claim
227 words
A portable computer system, comprising: a universal serial bus (USB) port that is selectively supplied power from any one of an alternating current (AC) adapter and a battery; detection means for detecting whether the alternating current (AC) adapter is connected to the portable computer system to supply power and generating a detection signal indicating a detected result as to whether the alternating current (AC) adapter is connected to the portable computer system to supply power; storing means for storing one of enabled state and a disabled state as a state of the universal serial bus (USB) port; over-current detection means for any one of generating an over-current detection signal and shutting down power supplied to the universal serial bus (USB) port when detecting an over-current from any one of the alternating current (AC) adapter and the battery; control means for generating a first control signal in response to the detection signal and the state of the universal serial bus (USB) port and generating a second control signal in response to the over-current detection signal, so as to selectively supply power and shut down power supplied to the universal serial bus (USB) port; and switching means for selectively supplying power and shutting down the power supplied to the universal serial bus (USB) port in response to any one of the first control signal and the second control signal.
Claim 3
Dependent Claim
65 words
The portable computer system of claim 1 , further comprised of the detection means comprising: a plurality of resistors; a transistor for generating the detection signal to indicate whether the alternating current (AC) adapter is connected to the portable computer system, the transistor being coupled to the plurality of resistors; and a tristate buffer for receiving and transmitting the detection signal to the control means.
Claim 4
Dependent Claim
68 words
The portable computer system of claim 1 , further comprised of the detection means comprising: a plurality of resistors; a transistor for generating the detection signal to indicate whether the alternating current (AC) adapter is connected to the portable computer system, the transistor being coupled to the plurality of resistors; and a microcontroller for receiving the detection signal and selectively generating an interrupt signal to the control means.
Claim 5
Dependent Claim
25 words
The portable computer system of claim 1 , further comprised of the storing means including a complementary metal oxide semiconductor (CMOS) random access memory (RAM).
Claim 6
Dependent Claim
162 words
The portable computer system of claim 1 , further comprised of the control means comprising: an input/output (I/O) register for receiving switching data and outputting the switching data as the first control signal so as to selectively shut down and supply power to the universal serial bus (USB) port; a central processing unit (CPU) for generating an address and control signals so as to read out the state of the universal serial bus (USB) port from the storing means and write the switching data to the input/output (I/O) register in response to the detection signal and the state of the universal serial bus (USB) port; decoding means for enabling the detection means and generating a clock signal to the input/output (I/O) register in response to the address and the control signals from the central processing unit (CPU); and a universal serial bus (USB) controller for generating the second control signal in response to the over-current detection signal from the over-current detection means.
Claim 7
Dependent Claim
43 words
The portable computer system of claim 1 , further comprised of the over-current detection means comprising an over-current protection circuit for generating the over-current detection signal, when the over-current is detected from any one of the alternating current (AC) adapter and the battery.
Claim 8
Dependent Claim
52 words
The portable computer system of claim 1 , further comprised of the over-current detection means comprising an over-current protection device including a fuse for shutting down the power to the universal serial bus (USB) port, when the over-current is detected from any one of the alternating current (AC) adapter and the battery.
Claim 9
Dependent Claim
194 words
A portable computer system, comprising: a universal serial bus (USB) port that is selectively supplied power from any one of an alternating current (AC) adapter and a battery; detection means for detecting whether the alternating current (AC) adapter is connected to the portable computer system to supply power and generating a detection signal indicating a detected result as to whether the alternating current (AC) adapter is connected to the portable computer system to supply power; over-current detection means for any one of generating an over-current detection signal and shutting down power supplied to the universal bus (USB) port when detecting an over-current from any one of the alternating current (AC) adapter and the battery; control means for generating a first control signal in response to the detection signal and generating a second control signal in response to the over-current detection signal, so as to selectively supply power and shut down power supplied to the universal serial bus (USB) port; and switching means for selectively supplying power and shutting down the power supplied to the universal serial bus (USB) port in response to any one of the first control signal and the second control signal.
Claim 10
Dependent Claim
194 words
A portable computer system, comprising: a universal serial bus (USB) port that is selectively supplied power from any one of an alternating current (AC) adapter and a battery; detection means for detecting whether the alternating current (AC) adapter is connected to the portable computer system to supply power and generating a detection signal indicating a detected result as to whether the alternating current (AC) adapter is connected to the portable computer system to supply power; over-current detection means for any one of generating an over-current detection signal and shutting down power supplied to the universal bus (USB) port when detecting an over-current from any one of the alternating current (AC) adapter and the battery; control means for generating a first control signal in response to the detection signal and generating a second control signal in response to the over-current detection signal, so as to selectively supply power and shut down power supplied to the universal serial bus (USB) port; and switching means for selectively supplying power and shutting down the power supplied to the universal serial bus (USB) port in response to any one of the first control signal and the second control signal.
Claim 11
Dependent Claim
65 words
The portable computer system of claim 8 , further comprised of the detection means comprising: a plurality of resistors; a transistor for generating the detection signal to indicate whether the alternating current (AC) adapter is connected to the portable computer system, the transistor being coupled to the plurality of resistors; and a tristate buffer for receiving and transmitting the detection signal to the control means.
Claim 12
Dependent Claim
68 words
The portable computer system of claim 8 , further comprised of the detection means comprising: a plurality of resistors; a transistor for generating the detection signal to indicate whether the alternating current (AC) adapter is connected to the portable computer system, the transistor being coupled to the plurality of resistors; and a microcontroller for receiving the detection signal and selectively generating an interrupt signal to the control means.
Claim 13
Dependent Claim
137 words
The portable computer system of claim 8 , further comprised of the control means comprising: an input/output (I/O) register for receiving switching data and outputting the switching data as the first control signal so as to selectively shut down and supply power to the universal serial bus (USB) port; a central processing unit (CPU) for generating an address and a control signal so as to write the switching data to the input/output (I/O) register in response to the detection signal; decoding means for enabling the detection means and generating a clock signal to the input/output (I/O) register in response to the address and the control signal from the central processing unit (CPU); and a universal serial bus (USB) controller for generating the second control signal in response to the over-current detection signal from the over-current detection means.
Claim 14
Dependent Claim
43 words
The portable computer system of claim 8 , further comprised of the over-current detection means comprising an over-current protection circuit for generating the over-current detection signal when the over-current is detected from any one of the alternating current (AC) adapter and the battery.
Claim 15
Dependent Claim
52 words
The portable computer system of claim 8 , further comprised of the over-current detection means comprising an over-current protection device including a fuse for shutting down the power to the universal serial bus (USB) port, when the over-current is detected from any one of the alternating current (AC) adapter and the battery.
Claim 16
Dependent Claim
177 words
A portable computer system, comprising: a universal serial bus (USB) port that is selectively supplied power from any one of an alternating current (AC) adapter and a battery; storing means for storing one of an enabled state and a disabled state as a state of the universal serial bus (USB) port; over-current detection means for any one of generating an over-current detection signal and shutting down power supplied to the universal serial bus (USB) port when detecting an over-current from any one of the alternating current (AC) adapter and the battery; control means for generating a first control signal in response to the state of the universal serial bus (USB) port and generating a second control signal in response to the over-current detection signal, so as to selectively supply power and shut down power supplied to the universal serial bus (USB) port; and switching means for selectively supplying power and shutting down the power supplied to the universal serial bus (USB) port in response to any one of the first control signal and the second control signal.
Claim 17
Dependent Claim
177 words
A portable computer system, comprising: a universal serial bus (USB) port that is selectively supplied power from any one of an alternating current (AC) adapter and a battery; storing means for storing one of an enabled state and a disabled state as a state of the universal serial bus (USB) port; over-current detection means for any one of generating an over-current detection signal and shutting down power supplied to the universal serial bus (USB) port when detecting an over-current from any one of the alternating current (AC) adapter and the battery; control means for generating a first control signal in response to the state of the universal serial bus (USB) port and generating a second control signal in response to the over-current detection signal, so as to selectively supply power and shut down power supplied to the universal serial bus (USB) port; and switching means for selectively supplying power and shutting down the power supplied to the universal serial bus (USB) port in response to any one of the first control signal and the second control signal.
Claim 18
Dependent Claim
25 words
The portable computer system of claim 14 , further comprised of the storing means including a complimentary metal oxide semiconductor (CMOS) random access memory (RAM).
Claim 19
Dependent Claim
174 words
The portable computer system of claim 14 , further comprised of the control means comprising: an input/output (I/O) register for receiving switching data and outputting the switching data as the first control signal so as to selectively shut down and supply power to the universal serial bus (USB) port; a central processing unit (CPU) for generating an address and control signals so as to read out the state of the universal serial bus (USB) port from the storing means and write the switching data to the input/output (I/O) register in response to the state of the universal serial bus (USB) port; decoding means for generating a clock signal to the input/output (I/O) register and generating a control signal for reading out from the storing means the state of the universal serial bus (USB) port in response to the address and the control signals from the central processing unit (CPU); and a universal serial bus (USB) controller for generating the second control signal in response to the over-current detection signal from the over-current detection means.
Claim 20
Dependent Claim
43 words
The portable computer system of claim 14 , further comprised of the over-current detection means comprising an over-current protection circuit for generating the over-current detection signal when the over-current is detected from any one of the alternating current (AC) adapter and the battery.
Claim 21
Dependent Claim
52 words
The portable computer system of claim 14 , further comprised of the over-current detection means including a fuse as an over-current protection device for shutting down the power to the universal serial bus (USB) port when the over-current is detected from any one of the alternating current (AC) adapter and the battery.
Claim 22
Independent Claim
182 words
A method for controlling power supplied to a universal serial bus (USB) port of a portable computer, comprising the steps of: determining whether an alternating current (AC) adapter is connected to the portable computer for supplying power; reading out one of an enabled state and a disabled state as a state of the universal serial bus (USB) port from a storing means that stores the state of the universal serial bus (USB) port; generating a first control signal for selectively shutting down and supplying power to the universal serial bus (USB) port in response to a result of the determining step and the state of the universal serial bus (USB) port; generating a second control signal when an over-current is detected from any one of the alternating current (AC) adapter and a battery so as to selectively shut down power supplied to the universal serial bus (USB) port; and switching selectively between supplying power and shutting down the power supplied to the universal serial bus (USB) port in response to any one of the first control signal and the second control signal.
Claim 23
Independent Claim
182 words
A method for controlling power supplied to a universal serial bus (USB) port of a portable computer, comprising the steps of: determining whether an alternating current (AC) adapter is connected to the portable computer for supplying power; reading out one of an enabled state and a disabled state as a state of the universal serial bus (USB) port from a storing means that stores the state of the universal serial bus (USB) port; generating a first control signal for selectively shutting down and supplying power to the universal serial bus (USB) port in response to a result of the determining step and the state of the universal serial bus (USB) port; generating a second control signal when an over-current is detected from any one of the alternating current (AC) adapter and a battery so as to selectively shut down power supplied to the universal serial bus (USB) port; and switching selectively between supplying power and shutting down the power supplied to the universal serial bus (USB) port in response to any one of the first control signal and the second control signal.
Claim 24
Independent Claim
136 words
A method for controlling power supplied to a universal serial bus (USB) port of a portable computer, comprising the steps of: determining whether an alternating current (AC) adapter is connected to the portable computer for supplying power; generating a first control signal for selectively shutting down and supplying power to the universal serial bus (USB) port in response to a result of the determining step; generating a second control signal when an over-current is detected from any one of the alternating current (AC) adapter and a battery so as to selectively shut down power supplied to the universal serial bus (USB) port; and switching selectively between supplying power and shutting down the power supplied to the universal serial bus (USB) port in response to any one of the first control signal and the second control signal.
Claim 25
Independent Claim
136 words
A method for controlling power supplied to a universal serial bus (USB) port of a portable computer, comprising the steps of: determining whether an alternating current (AC) adapter is connected to the portable computer for supplying power; generating a first control signal for selectively shutting down and supplying power to the universal serial bus (USB) port in response to a result of the determining step; generating a second control signal when an over-current is detected from any one of the alternating current (AC) adapter and a battery so as to selectively shut down power supplied to the universal serial bus (USB) port; and switching selectively between supplying power and shutting down the power supplied to the universal serial bus (USB) port in response to any one of the first control signal and the second control signal.
Claim 26
Independent Claim
159 words
A method for controlling power supplied to a universal serial bus (USB) port of a portable computer, comprising the steps of: reading out one of an enabled state and a disabled state as a state of the universal serial bus (USB) port from a storing means that stores the state of the universal serial bus (USB) port; generating a first control signal for selectively shutting down and supplying power to the universal serial bus (USB) port in response to the state of the universal serial bus (USB) port; generating a second control signal when an over-current is detected from any one of an alternating current (AC) adapter and a battery so as to selectively shut down power supplied to the universal serial bus (USB) port; and switching selectively between supplying power and shutting down the power supplied to the universal serial bus (USB) port in response to any one of the first control signal and the second control signal.
Claim 27
Independent Claim
159 words
A method for controlling power supplied to a universal serial bus (USB) port of a portable computer, comprising the steps of: reading out one of an enabled state and a disabled state as a state of the universal serial bus (USB) port from a storing means that stores the state of the universal serial bus (USB) port; generating a first control signal for selectively shutting down and supplying power to the universal serial bus (USB) port in response to the state of the universal serial bus (USB) port; generating a second control signal when an over-current is detected from any one of an alternating current (AC) adapter and a battery so as to selectively shut down power supplied to the universal serial bus (USB) port; and switching selectively between supplying power and shutting down the power supplied to the universal serial bus (USB) port in response to any one of the first control signal and the second control signal.
References Cited (Backward Citations)
US3740569A
Cited
US4373183A
Cited
US4395710A
Cited
US4528662A
Cited
US5237258A
Cited
JPS62277440A
Cited
US4907183A
Cited
EP0317072A2
Cited
US5163124A
Cited
US4980836A
Cited
US5036251A
Cited
US5257163A
Cited
US5448554A
Cited
US5485458A
Cited
US5465366A
Cited
US5877745A
Cited
US5689574A
Cited
US5587876A
Cited
US5730512A
Cited
US5675364A
Cited
US5758171A
Cited
US5767844A
Cited
US5799196A
Cited
US5938770A
Cited
US5914877A
Cited
US5890015A
Cited
US6009529A
Cited
US5884086A
Cited
US6253267B1
Cited
US6253329B1
Cited
US6067628A
Cited
US6345364B1
Cited
US6357011B2
Cited
US6338143B1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2006-02-03 | 2006-08-05 | 2007-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2010-02-03 | 2010-08-05 | 2011-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2014-02-03 | 2014-08-05 | 2015-02-04 | $7700.00 | Window Closed / Lapsed |