Method and apparatus for managing power of portable information device

1. An apparatus for managing power of a portable information device, the apparatus comprising:

a display unit to display a power management mode picture in response to a wake-up signal that is input during a low-power consumption state of the portable information device, the power management mode picture occupying a portion of an image displayed by the display unit; and

a processing unit to maintain the portable information device in the low-power consumption state unless a user's input in an area of the power management mode picture, as a response to the power management mode picture, is received within a predetermined time after the power management mode picture is output to the display unit,

wherein the wake-up signal is generated when a phone call is received.

2. The apparatus of claim 1 , wherein the processing unit sets the portable information unit in a normal operating state when the user's input is received within the predetermined time.

3. The apparatus of claim 1 , wherein the display unit comprises a touch-screen display and the user's input being received upon the user pressing the two icons on the touch-screen display.

4. The apparatus of claim 3 , wherein the user's input is received upon the user simultaneously pressing the two icons on the touch-screen display.

5. The apparatus of claim 1 , wherein the power management mode picture includes at least one area to receive user's input to determine whether the wake-up signal is input according to the user's intention.

6. A method of managing power of a portable information device, the method comprising:

placing the portable information device in a suspend state when power of the portable information device falls below a pre-determined threshold;

generating a power management mode picture as a predetermined portion of an image displayed on a display and temporarily setting the portable information device in a power management screen saver mode in response to a wake-up signal that is input during the suspend state; and

returning the portable information device to the suspend state when a user input, as a response to the power management mode picture, is not received in an area of the power management mode picture within a predetermined time after the power management mode picture is generated,

wherein the wake-up signal is generated when a phone call is received.

7. The method of claim 6 , further comprising:

setting the portable information device in a normal operating state when the user's input is received within the predetermined time.

8. An apparatus for managing power of a portable information device, the apparatus comprising:

a complex programmable logic device (CPLD) unit to send an interrupt signal based on whether a battery voltage drops below a predetermined threshold voltage;

a processing unit to receive the interrupt signal and to enter a suspend mode;

a first general purpose input-output (GPIO) unit to receive the interrupt signal from the CPLD indicating the battery voltage drop being below the predetermined threshold voltage and sending a control signal;

a sleep mode setting unit to receive the control signal from the first GPIO unit and to set the portable information device to a low-power consumption mode;

an input/output device (I/O) device unit to generate a predetermined wake-up signal;

a second GPIO unit to receive and to transmit the wake-up signal; and

a power management screen saver mode executing unit to receive the transmitted wake-up signal from the second GPIO unit and to execute a power management screen saver mode while outputting a power management mode picture to a display unit of the I/O device unit, the power management mode picture occupying a predetermined portion of an image displayed on the display unit,

wherein the wake-up signal is generated when a phone call is received.

9. The apparatus for managing power of a portable information device according to claim 8 , wherein the power management mode picture indicates if the wake-up signal is generated intentionally.

10. The apparatus for managing power of a portable information device according to claim 8 , wherein the power management screen saver mode executing unit returns the portable information device to the low-power consumption state when a user input, as a response to the power management mode picture, is not received within a predetermined time after the power management mode picture is generated.

11. A method of managing power of a portable information device the method comprising:

displaying a power management mode picture as a predetermined portion of an image displayed on a display in response to a wake-up signal that is input during a low-power consumption state of the portable information device;

maintaining the portable information device in the low-power consumption state unless a user's input in an area of the power management mode picture, as a response to the power management mode picture, is received within a predetermined time after the power management mode picture is output,

wherein the wake-up signal is generated when a phone call is received.

12. An apparatus for managing power of a portable information device, the apparatus comprising:

a sleep mode setting unit setting the portable information device in a suspend state when power of the portable information device falls below a pre-determined threshold;

a display unit displaying an image;

a power management screen saver mode executing unit generating a power management mode picture as a portion of the image displayed by the display unit and temporarily setting the portable information device in a power management screen saver mode in response to a wake-up signal that is input during the suspend state; and

a normal operating mode setting unit returning the portable information device to the suspend state when a user input, as a response to the power management mode picture, is not received in an area of the power management mode picture within a predetermined time after the power management mode picture is generated,

wherein the wake-up signal is generated when a phone call is received.

13. An apparatus for managing power of a portable information device, the apparatus comprising:

a display unit to display a power management mode picture when a wake-up signal is input during a low-power consumption state of the portable information device, the power management mode picture occupying a portion of an image displayed by the display unit; and

a processing unit to set the portable information device in a normal operating state when a user's input in an area of the power management mode picture, as a response to the power management mode picture, is received within a predetermined time after the power management mode picture is output to the display,

wherein the wake-up signal is generated when a phone call is received.