KR19990085447A - Motion vector encoding / decoding method and apparatus - Google Patents

Abstract

The present invention relates to a power management method in a personal computer system having a user sensing function, the power state management method according to the present invention (a) repeatedly checks the information detected by the user sensing device at a predetermined cycle and Determining user detection information by a user's seat if a user who was previously detected is not detected and by a user's seat when a user who was not previously detected is detected; (b) generating an interrupt informing the CPU of the content if the user sensed information is the user's seat in step (a); (c) the CPU changing the power state to the standby state in step (b); (d) generating an interrupt for notifying the CPU of the content if the user sensed information is a user sitting in step (a); And (e) restoring the power state to the normal state by the step (d).

According to the present invention, the user does not have to wait for the timeout set as the timeout when the user leaves the place where the work is performed with the computer, and the user does not need to consciously input a predetermined key without waiting for the user's standby state or immediately. Power saving function is enhanced by entering POS state.

Description

Power Management Method in Computer System with User Detection

The present invention relates to a personal computer system, and more particularly, to a power management method in a personal computer system having a user sensing function.

Personal computer systems, especially computer systems that users carry and use, such as notebook computer systems, are operated by chargers of limited capacity. Therefore, power management that automatically reduces the power of the parts not currently used and supplies power only to the parts that are not used so that the system can be used as long as possible with limited capacity of the rechargeable battery is very important.

In a personal computer system, the system power state is managed by the BIOS. BIOS manages the system power status into normal, standby by status, P.OS (Power On Suspend) status and suspend status.

When the personal computer system is powered on, a switching mode power supply (hereinafter referred to as SMPS) supplies power to each component in the system. At this time, the system driving state becomes a normal state. When the personal computer system, which was executed in the normal state, waits for an event occurrence without performing a special task for a predetermined time, the BIOS detects this and converts the system driving state into the standby state. In the standby state, power supply to certain components, including the monitor screen of the personal computer system, is interrupted. Thus, personal computer systems can obtain a primary power saving effect.

If the standby state lasts for a predetermined time, the BIOS converts the power state into a POS state. In the POS state, the chipset inside the microprocessor and computer system maintains power, but power to the monitor screen, floppy disk drive, and hard disk drive is interrupted. As a result, the personal computer system can obtain a secondary power saving effect.

When a predetermined event occurs in the personal computer system in the standby state and the POS state, a wake up signal is generated so that the BIOS supplies power to the monitor screen to return to the normal state.

If the POS state persists for a period of time, the BIOS stores all current system state on the hard disk and turns off the microprocessor, monitor screen, floppy disk drive, hard disk drive, and any other subsystem. Switch the power state to the stop state. As a result, the personal computer system can obtain a third power saving effect.

In the suspended state, when a predetermined time set in the system elapses or when the power button is pressed, the personal computer system returns to the normal state.

According to the conventional method as described above, even when the user is using the personal computer system, the screen of the computer system may be turned off if the user does not perform a task for a predetermined time, and thus the user may feel uncomfortable.

In addition, even when the user leaves the work place with the computer, the computer is turned on by the time required for timeout, which wastes unnecessary electricity. In order to avoid this, conventionally, a predetermined key is provided and a function of directly converting to a standby or POS state is provided. However, an unfamiliar user feels inconvenient because the user must consciously press the key.

In addition, when the user returns to the seat where the user was seated, in order to return the computer system to its original state, there was an inconvenience of generating an event through a keyboard input or a mouse input or pressing the power button again.

The present invention was made to solve the above problems, and an object thereof is to provide a power management method using a user sensing function in a computer system.

1 is an external view of a notebook computer system having a user sensing function according to the present invention.

2 is an internal configuration diagram of a general personal computer system.

3 is an internal configuration diagram of a personal computer system having a user sensing function according to the present invention.

4 is a cross-sectional side view of a notebook computer system having a user sensing function according to the present invention.

5A is a cross-sectional view of the light emitting device and the light receiving device according to the present invention as viewed in the direction of FIG.

5B is a cross-sectional view of the light emitting device and the light receiving device according to the present invention as viewed in the direction of FIG.

5C is a cross-sectional view of the light emitting device and the light receiving device according to the present invention as viewed in the direction (c) of FIG. 4.

6 is a sectional view of a notebook computer system having a user sensing function according to the present invention in plan view.

7 is a circuit diagram of an embodiment of a light emitting device that is a component of the present invention.

8 is a circuit diagram of an embodiment of a light receiving device that is a component of the present invention.

9 is a waveform diagram used in a light emitting device and a light receiving device which are components of the present invention.

10 is a state diagram for explaining a power management method according to the present invention.

11 is a flowchart illustrating a power management process according to the present invention.

In order to achieve the above object, the method for managing the power supply status by the information detected by the user sensing device installed in the main body of the personal computer system according to the present invention (a) the user sensing device repeatedly at a predetermined period Checking the information sensed by the user, and determining the user detection information by the user's seat if the user who was previously detected is not detected and by the user's seat when the user who was not previously detected is detected; (b) generating an interrupt for notifying the CPU of the contents if the user sensed information is a user's seat in step (a); (c) the CPU changing the power state to a standby state in step (b); (d) generating an interrupt for notifying the CPU of the content if the user sensing information is a user sitting in the step (a); And (e) restoring the power state to the normal state by the CPU in step (d).

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

1 is an external view of a notebook computer according to the present invention. Referring to FIG. 1, a notebook computer includes a main body 10 and an input / output device, and the most basic input / output device includes a liquid crystal display (LCD) 12, a keyboard 14, and a touchpad ( 16) and the like. A CPU, a memory, a disk driver, a video controller, a keyboard controller, and the like are installed in the main body 10. A power button 18 for controlling a power supply to a computer system is installed outside the main body 10. have. In addition, a light emitting device and a light receiving device 20 for detecting a user are installed on the front portion of the main body 10.

2 is an internal block diagram of a general personal computer system, and is generally composed of a CPU 210, a system controller 220, a PCI-ISA bridge 230, and an I / O controller 240.

The system controller 220 is connected to the cache memory 222 and the DRAM (224) and the like, and a PCI bus for the host bus 250 and the peripheral component interconnect (PCI) device 262 connected to the CPU 210. 260 includes a bridge, a cache memory controller, and the like.

The PCI-ISA bridge 230 is a bridge connecting the PCI bus and the ISA bus 270 for the Industry Standard Architecture (ISA) device 272, which is represented as a hard disk drive (HDD) 232 and an optical disk. And an IDE controller which is connected to and controls the CD-ROM drive 234 or the like.

An input unit 242 including a keyboard, a mouse, a serial / parallel pod, a ROM-BIOS 244, and the like are connected to the I / O controller 240, and a PCI- is connected through an ISA bus 270. Is connected to the ISA bridge 230. In addition, the I / O controller 240 also serves as a power controller that receives power command from the ROM-bios 244 and transmits a control signal related to power supply to the SMPS.

According to FIG. 3, a computer system having a user sensing function according to the present invention includes a power controller 300, a light emitting device 310, and a light receiving device 320.

The power controller 300 is implemented as a microcomputer and generates and transmits a light emitting control signal a having a predetermined period so that the light emitting device 310 can emit light. The period of the light emission enable control signal a is selected from a value of 0.5 seconds or more and 2 seconds or less. In the embodiment of the present invention, a period of 1 second is selected. In addition, by checking the light receiving signal (b) input from the light receiving device 320 to determine whether the user is detected, and if it is determined that the previously detected user is not detected, generates an interrupt notifying the user's seat, and If an undetected user is found to be detected, an interrupt is generated to notify the user of seating. The power controller 300 receives a command for power control from the ROM-bio and transmits a control signal for supplying power to the system logic circuit 330 by the SMPS 350.

The light emitting device 310 receives the light emission control signal a from the power controller 300 and emits light of a predetermined frequency during the period in which the light emission control signal a is enabled. At this time, the frequency of the emitted infrared light may be selected from a variety of values, but in the embodiment of the present invention uses 37.9 kHz having a range of 37.4 kHz or more and 38.4 kHz or less.

The light receiving device 320 detects the light generated by the light emitting device 310 and transmits the reflected light to the power controller 300.

Then, the ROM management system SMI (System Management Interrupt) processing unit 340 is controlled by the CPU of the computer system by the interrupt generated by the power controller, and changes the power state to a normal state in the case of user seating, In the case of a user seat, the apparatus further comprises a code means for changing to a standby state.

4 is a cross-sectional side view of a notebook computer system having a user sensing function according to the present invention. The light emitting device 310 and the light receiving device 320 shown in FIG. 3 may emit and receive light in a direction forming a predetermined angle from a horizontal angle of the notebook computer system of 15 degrees or more and an upward angle of 45 degrees or less. It is installed in the front part. In the embodiment of the present invention is installed to form an upward angle of 30 °. 4, the light emitting device and the light receiving device 400 are installed 5 to 10 mm inward from the main body case surface of the notebook computer system.

5A, 5B, and 5C are views of the light emitting device and the light receiving device viewed from the directions (a), (b), and (c) in FIG. 4, respectively. Referring to FIG. 5A, the light emitting device 310 and the light receiving device 320 are each 2 cm or more and are separated by a predetermined distance from a value of 4 cm or less, and are installed in the main body of the notebook computer system, respectively, and the blocking walls 520 and 530, respectively. It is protected by) for precise light sensing.

6 is a sectional view of a notebook computer system having a user sensing function according to the present invention in plan view. 6, the light emitting device 600 and the light receiving device 610 are respectively installed slightly to the right of the central portion of the notebook computer system viewed from the front.

7 is a circuit diagram of an embodiment of a light emitting device used in a computer system having a user sensing function according to the present invention, Figure 8 is a circuit diagram of an embodiment of a light receiving device. The IR_SENSOR_OUT # signal in FIG. 7 indicates the light emission control signal a shown in FIG. 3, and the IR_SENSOR_IN # signal in FIG. 8 indicates the light reception signal b shown in FIG. 3.

Fig. 9 shows waveforms of (a) the light emission control signal, (b) the light signal emitted by the light emitting device, (c) the light signal received by the light receiving device, and (d) the light receiving signal output by the light receiving device.

Referring to FIG. 9A, the light emission control signal generated by the power supply controller 300 has a period of 1 second, has a width of 0.2 Hz, and is an active low signal.

Referring to FIG. 9B, the light emitting device receives a light emission control signal from the power supply controller 300 and emits infrared light having a frequency of 37.9 kHz when the signal is low.

The light receiving device receives the light emitted by the light emitting device and reflected by the user, whose waveform is as shown in Fig. 9C.

The light receiving device converts the received light into an electrical signal to transmit the power controller, and the power controller checks whether the user is detected by the waveform shown in FIG. 9 (d). At this time, in order to prevent malfunction due to noise, the power supply controller after a predetermined delay time (0.1 to 0.18 ms in this embodiment) has elapsed when the light emission enable control signal falls from high to low. Detect and judge the received signal. Therefore, malfunction due to noise detected at a time other than the detection time is prevented.

The power controller determines the user seating and seating as follows.

The power controller detects the light receiving signal input from the light receiving device every 1 second as described above, and if the user does not continuously detect the object 10 times at the time when the user is continuously detected, the power controller determines that it is a user's seat. Then, after determining that the user is seated, the received signal is detected every 1 second, and if an object is detected twice in a row, the seated user is determined. Here, 10 detections for judging by the user's seat and 2 detections for judging by the user's seat can be set in varying degrees depending on the environment in which the user uses the computer system and the characteristics of the computer system.

10 and 11, a method of managing a system power state in a personal computer system having a user sensing function according to the present invention is as follows. Both the power management method by the timeout by the existing method and the power management method by the user sensing function according to the present invention have options, so that the user can use these functions selectively or all.

First, the case where only the user detection function is selected as an option will be described.

When the power controller detects the user's seat, when the power state is normal, the ROM-BIOS changes the power state to the standby state by the SMI indicating the user's seat from the power controller regardless of timeout (step 1100). In the standby state, power supply to certain components including the monitor screen of the personal computer system is stopped (step 1105).

If the standby state lasts for a predetermined time to time out, the BIOS converts the power state to the POS state. In the POS state, the chipset inside the microprocessor and computer system maintains power, but power to the monitor screen, floppy disk drive, and hard disk drive is interrupted.

When a predetermined event occurs in the personal computer system in the standby state and the POS state, and a wake up signal is generated or an SMI is generated to inform the user's seating from the power controller, the ROM-BIOS supplies power to the monitor screen and the like. Causes the state to return to normal.

If the POS state lasts for a certain time and times out, the ROM-Bios stores all current system state on the hard disk, and the microprocessor, monitor screen, floppy disk drive, hard disk drive, and some other subsystems. The power state is switched to a stop state in which all of the powers are turned off (steps 1110 to 1125). At this time, the power supply to the basic sensing device of the computer system, such as a power controller, a light emitting device, and a light receiving device, is maintained (step 1130).

The user sensing device checks whether the user is detected every predetermined time (steps 1135 and 1140). In the suspended state, when the user presses the power button or an SMI is generated to notify the user's seating from the power controller, the ROM-Bios supplies power to the entire system again (step 1145) and restores the system state stored in the hard disk to the personal. The power state of the computer system is returned to the normal state (step 1150).

The following describes the case where both the user detection function and the timeout option are selected.

When the power status is normal, the ROM-Bios is powered off when the personal computer system that has been operating in normal status has timed out without performing a special operation for a predetermined time, or when an SMI for notifying a user is notified by the power controller. Change the state to standby. The rest of the process is the same as when only the user detection function is set.

According to the present invention, the user does not have to wait for the timeout set as the timeout when the user leaves the place where the work is performed with the computer, and the user does not need to consciously input a predetermined key without waiting for the user's standby state or immediately. Power saving function is enhanced by entering POS state.

In addition, when the user returns to the location where the computer system is installed, the operating environment of the computer system is returned to the original working state even if the user does not generate any event again so that the user can use it conveniently.

Claims (3)

In the method for managing the power state by the information detected by the user sensing device installed in the main body of the personal computer system, (a) repeatedly checks the information detected by the user sensing device at a predetermined cycle, and if the user who has not been detected before is detected, the user's seat is detected. Determining information; (b) generating an interrupt for notifying the CPU of the contents if the user sensed information is a user's seat in step (a); (c) the CPU changing the power state to a standby state in step (b); (d) generating an interrupt for notifying the CPU of the content if the user sensing information is a user sitting in the step (a); And (e) a method for managing power in a personal computer system having a user sensing function, comprising the step of recovering the power state to a normal state by the CPU in step (d). The method of claim 1, wherein step (c) Changing a power state to a P.S. state if an event does not occur for a predetermined time or a user seating is not detected in the personal computer system in the standby state; And And changing the power state to a suspended state if an event does not occur or a user seat is not detected for a predetermined time in the personal computer system in the P.S. state. Power management method in a computer system having a. The method of claim 1, wherein step (e) And restoring a previous operating environment previously stored in a predetermined storage medium to an original state when the previous power state is in a stopped state.