System and method for detection of an accessory device connection status

• US 7,296,107 B2
• Filed: 10/28/2003
• Issued: 11/13/2007
• Est. Priority Date: 04/23/1999
• Status: Expired due to Fees

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Palm, Inc. (TCL Technology Group Corp.)
• Inventors: Lemke, Steven C., Osborn, Neal A., Canova, Francis J. Jr., Johnson, Scott R., Lunsford, Eric M.
• Primary Examiner(s): Myers; Paul R.
• Application Number:
  US10/696,153
• Publication Number:
  US 20040073823A1
• Time in Patent Office: 1,477 Days
• Field of Search: 713300-340, 710/304
• US Class Current: 710/304
• CPC Class Codes: G06F 1/1613 for portable computers cooling arrangements therefor G06F1/203; constructional details or arrangements for pocket calculators, electronic agendas or books G06F15/0216; constructional details of portable telephone sets: with several bodies H04M1/0202
• CPC Class Codes: G06F 1/1632 External expansion units, e.g. docking stations
• CPC Class Codes: G06F 1/3203 Power management, i.e. event-based initiation of a power-saving mode
• CPC Class Codes: G06F 1/3215 Monitoring of peripheral devices
• CPC Class Codes: G06F 1/325 Power saving in peripheral device
• CPC Class Codes: G06F 1/329 by task scheduling
• CPC Class Codes: G06F 2200/1632 Pen holder integrated in the computer
• CPC Class Codes: Y02D 10/00 Energy efficient computing, e.g. low power processors, power management or thermal management
• CPC Class Codes: Y02D 30/50 in wire-line communication networks, e.g. low power modes or reduced link rate

Abstract

Embodiments of this invention provide for a portable computer that determines whether an accessory device is actively connected to it. In one embodiment, the portable computer may include a signal line accessible through an output of the portable computing device. The signal line may be connected to a communication device such as a communication cradle. The portable computer may detect a signal on the signal line to determine whether the communication device is actively connected to the portable computer. If the communication device is actively connected, the portable computer suspends implementation of a time-out feature that would otherwise reduce power consumption of the portable computer.

Claims

1. A method for operating a portable computing device, the method comprising:

detecting that an external computing device is actively connected to communicate and provide power to the portable computing device; and

responsive to detecting the external computing device, suspending execution of at least a portion of a program that would otherwise reduce a power consumption of the portable computing device after a given duration of inactivity;

wherein suspending execution of at least a portion of a program includes suspending occurrence of a timeout feature; and

wherein the method further comprises launching a program that is transferred to the portable computing device through the external computing device once the occurrence of the time-out feature is suspended.

2. The method of claim 1, wherein launching a program includes providing a display content selected from a group of display contents consisting of a world clock, a digital image stored from a digital camera device, and a display of real-time information provided by a data network.

3. The method of claim 1, further comprising transmitting one or more communications from the portable computing device using the external computing device when the external computing device is actively connected to the portable computing device.

4. The method of claim 1, wherein detecting that an external computing device is actively connected to communicate and providing power includes measuring a voltage level of a signal provided from the external computing device.

5. The method of claim 1, wherein suspending execution of at least a portion of a program includes operating software to continuously illuminate a display of the portable computing device.

6. The method of claim 1, wherein suspending execution of at least a portion of a program includes operating software to continuously display a digital image on the display of the portable computing device.

7. A method for operating a portable computing device, the method comprising:

detecting that an accessory device is connected to communicate and provide power to the portable computing device; and

responsive to detecting the accessory device, suspending execution of at least a portion of a program that would otherwise reduce a power consumption of the portable computing device after a given duration of inactivity;

wherein detecting that an accessory device is connected and providing power to the portable computing device includes coupling one or more signal lines accessible through an outlet of the portable computing device to the accessory device; and

wherein the method further comprises determining a type of the accessory device from a signal on the one or more signal lines.

8. The method of claim 7, further comprising configuring execution of software on the portable computing device based on the type of the accessory device that is determined from the signal on the one or more signal lines.

9. The method of claim 7, wherein determining a type of the accessory device includes determining whether the accessory device is a device that extends power from an external power supply or an external computing device.

10. A method for operating a portable computing device, comprising:

responsive to a connector of the portable computing device being connected to a connector of an accessory device, receiving on one or more signal lines, one or more signals from the accessory device, the one or more signals including a power signal;

automatically determining a type of accessory device coupled to the portable computing device using one or more signals on the one or more signal lines; and

responsive to receiving the power signal from the accessory device, suspending a feature for reducing power consumption of the portable computing device after a given duration of inactivity; and

responsive to receiving one or more signals from the accessory device, executing at least one program based on the type of accessory device.

11. The method of claim 10, wherein suspending a feature for reducing power consumption of the portable computing device includes suspending the feature for reducing an intensity of light in a display of the portable computer device.

12. The method of claim 10, wherein automatically determining a type of accessory device coupled to the portable computing device includes determining a level of power that is supplied by the accessory device to the portable computing device.

13. A method for operating a portable computing device, the method comprising:

detecting whether an external power is being provided to the portable computing device from a computing device external to the portable computing device;

if the external power is not being provided, executing at least a portion of a program to cause the portable computing device to reduce operations and power consumption after a given duration of inactivity;

else

if the external power is being provided, suspending execution of at least the portion of the program and maintaining a display of the portable computing device at a high setting of brightness unless an input is provided from a user to reduce or turn-off the display; and

causing the external computing device and the portable computing device to communicate with one another in response to a user-interaction with an interface of the external computing device.

14. The method of claim 13, wherein while the external power is being provided, suspending execution of at least the portion of the program includes maintaining a content appearing on a display of the portable computing device.

15. The method of claim 14, wherein the content corresponds to a digital image.

16. The method of claim 13, wherein suspending execution of at least the portion of the program includes maintaining a backlight of a display, after the backlight is turned on, while the external power is being provided.

17. The method of claim 14, wherein

if the external power is not being provided, executing at least a portion of a program to cause the portable computing device to reduce operations and power consumption includes switching a backlight off a first given duration after the backlight is turned on;

if the external power is being provided, suspending execution of at least the portion of the program includes maintaining the backlight on for at least a duration that is longer than the first given duration.

18. The method of claim 13, wherein

if the external power is not being provided, executing at least a portion of a program to cause the portable computing device to reduce operations and power consumption includes switching a backlight off a first given duration of inactivity after the backlight is turned on;

if the external power is being provided, suspending execution of at least the portion of the program includes maintaining the backlight on for at least a duration of inactivity that is longer than the first given duration of inactivity.

19. A method for operating a portable computing device, the method comprising:

operating the portable computing device in a first mode of high power consumption;

detecting inactivity of user-interaction with the portable computing device for a first duration of time when the portable computing device is in the first mode of high power consumption;

responsive to detecting inactivity for the first duration of time, executing a first programmed event to switch operation of the portable computing device from the first mode into a second mode of intermediate power consumption, in which a display of the portable computing device is at least partially powered;

detecting whether an accessory device is connected to provide power to the portable computing device;

while the portable computing device is in the second mode, detecting inactivity of user-interaction with the portable computing device for a second duration of time,

responsive to detecting inactivity for the second duration of time and if the accessory device is not detected as being connected, executing a second programmed event to switch operation of the portable computing device from the second mode into a third mode of lower power consumption in which the display is not powered;

else

responsive to detecting inactivity for the second duration of time and if the accessory device is detected as being connected, suspending execution of the second programmed event that would otherwise reduce a power consumption of the portable computing device after the second duration of inactivity, wherein suspending execution of the second programmed event includes performing at least one of (i) maintaining operation of the portable computing device in the second mode, or (ii) executing a third programmed event to switch operation of the portable computing device from the second mode to the first mode.

20. The method of claim 19, wherein the accessory device corresponds to a device that extends power from an external power supply.

21. The method of claim 19, wherein the accessory device is a communication device.

22. A method for operating a portable computing device, the method comprising:

enabling execution of at least a portion of a program to selectively power on and power off a backlight of a display screen for the portable computing device in response to one or more events, wherein selectively powering on and powering off the backlight is independent of the display screen;

detecting a period of inactivity in a user-interaction with the portable computing device;

responsive to detecting the period of inactivity, suspending a feature for reducing power consumption of the portable computing device, including executing at least the portion of the program to power off the backlight independent of the display screen being powered on; and

displaying a digital image while the display screen is powered on.

23. The method of claim 22, further comprising detecting whether an accessory device is providing power to the portable computing device, and responsive to determining that the accessory device is providing power, recharging a battery of the portable computing device.

24. The method of claim 23, wherein the method further comprises:

responsive to not detecting the accessory device providing power, powering off the display screen after an other period of inactivity.

25. The method of claim 22, wherein suspending a feature for reducing power consumption includes delaying execution of the feature.

26. A portable computing device comprising:

a connector comprising a plurality of signal lines;

a processor programmed to;

detect an accessory device that is connected to the connector;

automatically determine information indicating whether the accessory device is of a particular type, and responsive to determining that the accessory device is of the particular type, execute a program for the type of accessory device; and

automatically detect whether the accessory device supplies power across the connector, and responsive to detecting power, suspend execution of at least a portion of a program that would otherwise reduce a power level of the portable computing device after a given duration of inactivity.

27. The portable computing device of claim 26, further comprising a rechargeable battery, and wherein the portable computing device is configured to recharge the battery when power is supplied from the accessory device.

28. The portable computing device of claim 27, further comprising:

an antenna for receiving wireless communications; and

a display.

29. The portable computing device of claim 28, wherein after the processor suspends execution of at least the portion of the program, the processor is configured to continuously display data from a data network on the display for at least a duration in which the accessory device supplies power.

30. The portable computing device of claim 26, further comprising:

a display; and

a backlight for the display; and

wherein the processor is configured to suspend execution of at least the portion of the program by powering off the backlight independent of the display.