TW587267B - Computer cooling management control method and a device for the same - Google Patents

Abstract

During system operation, the invention provides an optimal power management configuration by switching the settings of an active cooling point and a passive cooling point based on external factors. In a personal computer system that carried out power management by rotating a cooling van 14, regulating the processing capacity of a CPU 13, or a combination thereof, an external event exemplified by changes in the power source drive configuration and changes in the body heat radiation characteristics due to an opening and closing operation of a display panel is detected by a drive power source detecting circuit 21 and a display panel opening/closing operation detection circuit 22, and during system operation, the active cooling point and the passive cooling point are dynamically switched by the power management control circuit 11, and thereby optimal power management is realized for various situations without user intervention.

Description

587267 V. Description of the invention (1) Manpeng background Field of the invention The present invention relates to a computer cooling management control method and device thereof, which is suitable for a personal computer system. The control of the cooling fan and the processing capacity of the CPU are used to implement the countermeasures. Cooling of installed components, including CPU. BACKGROUND In the field of personal computers (PCs), small, lightweight, portable, and convenient notebook personal computers have become widely used, replacing conventional desktop personal computers. Because of its characteristics, this type of PC system usually uses a battery or an AC adapter as the power source. In addition, it also uses a flat display panel, such as a liquid crystal display (LCD). However, in the components of this type of PC, the CPU in the control system center generates most of the heat. When the CPU overheats, the entire system will stop due to thermal runaway. To avoid this situation, power management methods have conventionally been used. Figure 4 shows the system structure of conventional power management. Here, the processing capacity control of the CPU 43 controlling the PC system center and the rotation control of the cooling fan 44 are performed by the power management control unit 41, so that thermal control is performed (hereinafter referred to as thermal management). There are two types of thermal management, active cooling method and passive cooling method. In fact, thermal management in PC systems is implemented by one or a combination of the two methods. The active cooling method uses a rotating cooling fan 44 to implement heat dissipation and ventilation, so that the CPU 43 can be maintained at its maximum

587267 V. Description of the invention (2) Limiting processing capacity. In contrast, this method has disadvantages in that the power consumption is increased and noise is generated by the cooling fan 44.

In contrast, the passive cooling method is related to the processing management of the CPU 43 and the CPU is used to perform the capacity control signal 48 for control. If the processing capacity is reduced, the heat generation of the CPU 43 is reduced, so that the thermal management of the PC system can be implemented without rotating the high power consumption cooling fan 44. The advantage obtained here is that the method is quiet because no rotation of the high power consumption cooling fan 44 occurs and the power saving characteristics are excellent. In contrast, this method has the disadvantage that the processing capacity of the CPU deteriorates. Inside the temperature sensor 42, two temperature thresholds for the active cooling point and the passive cooling point can be set in advance. The temperature for the rotation and suspension of the cooling fan 44 is determined by the active cooling point, and whether the processing capacity control of the CPU 43 is implemented is determined by the passive cooling point.

In practice, during the system operation, the temperature thresholds of the active cooling point and the passive cooling point are fixed, and in the case where the setting of the active cooling point is smaller than the setting of the passive cooling point, the advantage is that the processing capacity of the CPU 43 is maintained At the maximum limit, at the same time, in contrast, the disadvantage is that the power consumption increases and the cooling fan 44 generates noise. In contrast, in the case where the setting of the passive cooling 値 is smaller than the setting of the active cooling point, the advantage is that the method is quiet and the power saving is excellent, and in contrast, the processing capacity of the CPU 43 is deteriorated. Description of the invention In view of the above problems, the purpose of the present invention is to provide a 587267 in a PC system. 5. Description of the invention (3) Computer cooling management control method and device, which rotates a cooling fan, adjusts the processing capacity of a CPU, or two In addition to the control structure described above, appropriate power management can be implemented in many conditions without user intervention and dynamically changing active cooling points and passive cooling points during system operation. The external events exemplified by changes in the power-driven architecture and the body's heat dissipation characteristics due to changes in the on / off operation. The computer cooling management control method of the present invention for solving the above problems is used in a personal computer, which implements an active cooling mode implemented by controlling the rotation of a cooling fan, and controls a CPU processing capacity to implement a passive cooling mode, or a combination of the two. To implement power management, and compare the temperature detected by the temperature sensor installed in the system and the preset temperature thresholds of each mode, so the best mode is selected, and during the system operation, the power supplied to the PC system is detected The power supply type and the temperature threshold setting for this mode selection reflect this type. In the case where the power source of the driving system is battery power or is converted to battery power by an AC adapter, the temperature threshold setting makes the active cooling mode smaller than the passive cooling mode, and when the power source is an AC adapter or a free pool power supply In the case of switching to an AC adapter, the temperature threshold setting is reset so that the active cooling mode is larger than the passive cooling mode, so the selection of the optimal mode is implemented dynamically. In addition, the computer cooling management control method of the present invention used in a personal computer system implements an active cooling mode by controlling the rotation of a cooling fan, a passive cooling mode by controlling the processing capacity of a CPU, or a combination thereof

587267 V. Description of the invention (4) The power management is not implemented, and the temperature sensor installed in the system is used to compare the temperature sensed by the system and the preset temperature thresholds for each mode. Therefore, the best mode is selected. During the operation, the system body including the input device detects the opening / closing operation of the display panel that is installed to be freely rotatable via the pivot mechanism, and forms a temperature threshold setting for selecting a mode to reflect the operation. In the case where the display panel is opened for visual state, the temperature threshold 値 is set so that the active cooling mode is larger than the passive cooling mode; and in the case where it is closed, the temperature threshold 値 is reset so that the active cooling mode is smaller than The passive cooling mode, so the selection of the best mode is implemented dynamically. The computer cooling management control driving device of the present invention for solving the above problems includes a fan to cool a CPU installed in a personal computer system; a power management control circuit to perform control of cooling fan rotation to implement an active cooling mode and control CPU processing capacity To implement a passive cooling mode or a combination thereof to implement power management, and compare the temperature detected by a temperature sensor installed in the personal computer system with a preset temperature threshold for each mode, or the weight of the driving power detection circuit Set the temperature threshold 値, so the best mode is selected; and the drive power detection circuit, which detects the power supply type of the drive system during the operation of the PC system, and forms the temperature threshold 用于 for the mode selection to reflect this type. The computer cooling management control driving device of the present invention for solving the above problems includes a fan for cooling a CPU installed in a personal computer system, and a power management control circuit for performing active cooling by controlling cooling fan rotation

587267 V. Description of the invention (5) Modal mode, control CPU processing capacity to implement passive cooling mode, or a combination of them to implement power management, compare the temperature detected by the temperature sensor installed in the personal computer system with The modal temperature threshold is preset, or the temperature threshold is reset by the drive power detection circuit, so the best mode is selected; and the display panel turns on / off the operation detection circuit, which includes the input device during system operation The system body detects the opening / closing operation of the display panel which is rotatably installed via the pivot mechanism, and forms a temperature threshold setting for selecting a mode to reflect the operation. In the above configuration, in a case where the power is supplied to the personal computer system via the AC adapter, the drive power detection circuit inputs the AC adapter insertion event detection signal, and the display panel is turned on when the display panel is set to be turned on for visual conditions. / Turn off the job detection circuit to generate an event detection signal. This event detection signal is monitored by the power management control circuit, and the power management control circuit detects the rise or fall of the AC adapter event detection signal, or the display panel on / off event detection signal, and notifies the CPU of the interrupt. The CPU receives interrupts and recognizes changes in the power drive architecture and the conditions of the LCD panel opening / closing via the power management control circuit. In addition, during the operation of the power management control circuit, the dynamic exchange of the active cooling point and the passive cooling point depends on the external events generated by the change of the power supply driving structure and the body's heat dissipation characteristics due to the change of the display panel opening and closing operations, without the user. Get involved and implement optimal power management in a variety of conditions. Therefore, in various situations, the optimal power management architecture is automatically selected, battery life is extended when the battery is in use, and personal computer systems

587267 V. Description of the invention (6) The reliability of thermal management is improved. Brief Description of the Drawings Figure 1 is a block diagram showing an embodiment of the present invention; Figure 2 is a flowchart for explaining the operation of the embodiment of the present invention; Figure 3 is a flowchart for explaining the operation of the embodiment of the present invention ; And FIG. 4 is a block diagram showing a conventional power management control device. Detailed Description of the Invention Fig. 1 shows a block diagram of an embodiment of the present invention. The difference between this embodiment and the conventional example shown in Figure 4 lies in the addition of a drive power detection circuit 21 and a display panel on / off operation detection circuit 2 2, and the output of circuits 21 and 22 is supplied to power management. Control circuit 11. The power management control circuit 1 shown in FIG. 1, the temperature sensor 1 2, the CPU 1 3, and the cooling fan 14 respectively correspond to and are the same as blocks 41, 42, 43, and 44 in FIG. 4. Circuit 2 1 transmits '' AC adapter to π to power management control circuit 1 1 as an event (AC insertion event detection signal). Moreover, a liquid crystal display is used herein as a display panel. The display panel on / off operation detection circuit 22 transmits “LCD panel on / off” to the power management control circuit 11 as an event (LCD panel on / off event detection signal). A personal computer (PC) system is assumed herein as the body, which includes an input device such as a keyboard and an LCD, which is rotatably installed via a pivot mechanism, and the opening / closing operation of the LCD panel is installed near the pivot Turn the micro switch of the mechanism to detect. When the PC system is in use, the micro switch is in

587267 V. Description of the invention (7) The LCD panel is set to be turned off (t u rn f f) when it is turned on for visual conditions, and turned on when the PC is not in use, and the LCD panel is turned off for carrying. In the above configuration, when the AC adapter is inserted into the PC system and the power is supplied to the PC system via the AC adapter, the driving power detection circuit 21 inputs a '' low π potential signal as the AC adapter insertion event detection signal 23. In the case where the AC adapter is unplugged, the M high " potential signal output is used as the AC adapter insertion event detection signal23. The AC adapter insertion event detection signal 23 is monitored by the power management control circuit 11 and the power management control circuit 11 detects the rise and fall of the AC adapter event detection signal 23 and notifies the CPU 1 3 of the interrupt (interrupt request signal 1 6 ). The CPU1 3 receives this notification, and reads the current input level of the AC adapter insertion event detection signal 23 through the power management control circuit 11 to clearly distinguish whether the power drive architecture has changed and whether there is an AC adapter drive Device or battery (DC) driven device). In addition, when the LCD panel is closed, the LCD panel on / off event detection signal transitions to a “low” potential, and then transitions to a “high” potential when the LCD panel is opened for visual inspection. The LCD panel on / off event detection signal 24 is monitored by the power management control circuit, and the power management control circuit 11 detects the rise or fall of the LCD on / off event detection signal 2 4 and notifies the CPU 1 3 of the interrupt (interrupt request signal 1 6 ). Upon receiving this interrupt, the CPU reads the current input level of the LCD panel on / off event detection signal 24 via the power management control circuit 11 to distinguish whether the LCD panel is on or off. Figures 2 and 3 are flowcharts for explaining the operation of the embodiment of the present invention

587267 V. Description of the invention (8), and respectively indicate the processing sequence of the power management control method in the case where the passive cooling point is less than the active cooling point and in the case where the active cooling point is less than the passive cooling point. Hereinafter, the operation of the embodiment of the present invention shown in FIG. 1 will be described in detail with reference to the flowcharts shown in FIGS. 2 and 3. Generally, where the power drive architecture is a battery power source, power management suitable for saving power is best implemented. In addition, comparing the situation when the LCD panel is closed and when the LCD panel is switched, when the LCD panel is closed, there is a tendency for the heat dissipation characteristics to deteriorate. Therefore, it is preferable to implement power management suitable for saving power. Therefore, in these cases, by setting the passive cooling point to be smaller than the active cooling point, the cooling method is executed first, in which the CPU processing capacity is controlled and heat generation is directly suppressed6. Specifically, when the system is started, the CPU 13 directly reads the potentials of the AC adapter insertion event detection signal 23 and the LCD panel on / off event detection signal 24 via the power management control circuit 11, and if the AC is switched The device insert event detection signal 23 is at "High" potential (battery-driven device), or the LCD panel on / off event detection signal 24 is at "Low" potential (LCD panel is off), then the passive cooling point is set. Less than the setting of active cooling point 値. The processing capacity control of the CPU 1 is given priority over the rotation of the cooling fan 14. As shown in FIG. 2, in a case where the temperature detected by the temperature sensor 12 exceeds each cooling point, the power management control circuit Π notifies the situation via the temperature alarm signal 15 (step S201). When receiving this signal, the power management control circuit 11 generates an interrupt request signal 16 and notifies the CPU 13 of the interrupt (step

-10- 587267 V. Description of the invention (9) S202) ° The CPU 13 receives the interrupt and reads the temperature from the temperature sensor 12 (step S203). The temperature read here compares the active cooling point and the passive cooling point (steps S204 and 205). As a result, the architecture of the power management shown in steps S206, S207, and S208, or its cooling fan 14 is clearly stopped and the CPU 1 3 The architecture where the processing capacity control is not implemented, where the cooling fan is stopped, and the CPU is implemented. 1 The architecture where the processing capacity control is implemented, and the architecture where the cooling fan is rotated, and the CPU is implemented, and the processing capacity control is implemented. . Power savings are superior in this scenario. In addition, when the system is turned on, if the AC adapter is plugged into the event detection signal 23 at "low" potential (AC power drive device) and the LCD panel on / off event detection signal 24 is at "high" potential (where the LCD panel is on State), the setting of the active cooling point is smaller than the setting of the passive cooling point, and the cooling fan 14 rotates prior to the CPU 1 3 processing capacity control. As shown in Figure 3, the temperature detected by the temperature sensor 12 In the case of exceeding each cooling point, the power management control circuit 11 notifies the situation via the temperature alarm signal 15 (step S301). The power management control circuit 11 receives this signal to generate an interrupt request signal 16 and notifies the CPU 13 of an interrupt (step S3) 02). The CPU 13 receives the interrupt, and reads the temperature from the temperature sensor 12 (step S303). Here, the read temperature is compared with the active cooling point and the passive cooling point (steps S304 and S305). As a result, step S306, The architecture of the power management shown in S307 and S308, or in which the cooling fan is explicitly stopped 4 and the CPU 13

-11- 587267 V. Description of the invention (10) Architecture where processing capacity control is not implemented, where the cooling fan 14 is stopped and CPU1 3 processing capacity control is implemented, and where the cooling fan is rotated and CPU1 3 processing capacity control is implemented. , Choose according to the situation. In this case, the system processing capacity is superior. Next, a case where power management control is used for AC adapter insertion and a case where an LCD panel on / off event occurs during system operation will be explained. First, in the case where the inserted AC adapter is pulled out, a rising edge of the AC adapter insertion event detection signal 23 appears, and the rising edge is detected by the power management control circuit 丨 丨 and an interrupt request signal 1 is generated. 6, and the CPU 13 notifies the interrupt. The reception is interrupted, and the CPU 13 reads the current input level of the AC adapter input event detection signal 23 via the power management control circuit 11 to a high level, and recognizes that it has changed from the AC adapter to the battery-driven device. As a result, the setting of the passive cooling point (reset is smaller than the setting of the active cooling point), and the implementation of the processing capacity control of the CPU 13 takes precedence over the rotation of the cooling fan 14 (refer to the flowchart of FIG. 2 above; in this case, the power saving is superior of). Secondly, in the case where the AC adapter is inserted into the PC system, a rising edge of the AC adapter insertion event detection signal 23 appears, and the rising edge is detected by the power management control circuit 11 to generate an interrupt request signal 16, And the CPU 13 notifies the interrupt. The reception is interrupted, and the CPU1 3 reads the current input level of the AC adapter insertion event detection signal 23 through the power management control circuit 11 to the "low" level, and recognizes that the power drive device has changed from the battery drive device -12- 587267 V. Description of invention (11) to AC adapter. As a result, the setting of the active cooling point (reset is smaller than the setting of the passive cooling point) (inverted relationship), and the rotation of the cooling fan 14 has priority over the processing capacity control of the CPU 13 (refer to the flowchart of FIG. 3 above; in this case, the system Processing capacity is superior). In contrast, in the case where the LCD panel is turned on for self-opening for a visual state change to a closed state, a rising edge of the LCD panel on / off event detection signal 24 appears, and this rising edge is detected by the power management control circuit 11 to generate an interrupt request Signal 16 and CPU1 3 notify the interrupt. Accept the interrupt, and the CPU 1 3 reads the LCD panel on / off event detection signal 24's current input level via the power management control circuit 11 at the "low" level, and recognizes that the LCD panel has changed from the on state to the off state. As a result, the setting and reset of the passive cooling point is smaller than the active cooling point (inverse relationship), and the processing capacity control of the CPU 13 has priority over the rotation of the cooling fan 14 (refer to the flowchart of FIG. 2 above; in this case, the power The savings are superior). Furthermore, in the case where the setting of the LCD panel is changed from the closed state to the opened for visual state, a rising edge of the LCD panel on / off event detection signal 24 appears, and the rising edge is detected by the power management control circuit 11 and an interrupt is generated. Request, and the CPU 13 notifies the interrupt. Receive interrupt, and CPU13 reads the LCD panel on / off event detection signal 24 through the power management control circuit. The current input level of the LCD panel is at the "high" level, and the setting of the cognitive LCD panel has been changed from the off state to the on for visual inspection. status. As a result, active cooling

-13- V. Description of the invention (12) The setting of the point (reset is smaller than the setting of the passive cooling point) (inverse relationship), and the implementation of the cooling fan 1 4 rotation takes precedence over the control of the CPU processing capacity (refer to the flow chart in Figure 3 above) Figure; in this case, the system processing capacity is superior). In a PC system that implements power management by rotating a cooling fan, adjusting CPU processing capacity, or a combination of both, depending on the change in the structure of the power supply drive device and the main body's heat dissipation characteristics due to the opening and closing of the display panel during system operation Depending on the exemplified external events, the active cooling point (temperature threshold 値) and passive cooling point (temperature threshold 値) are dynamically exchanged with the present invention described above, so that an optimal power management system with different conditions is realized. According to the present invention described above, depending on changes in the power supply and drive device architecture and external events exemplified by changes in the heat dissipation characteristics of the body due to display panel opening and closing operations during system operation, active cooling points and passive cooling points are dynamically exchanged, and Automatically select the best power management architecture for individual situations without user intervention. Therefore, the battery-driven battery life extension can be measured, and the reliability of the PC system regarding thermal management is improved. Explanation of reference symbols 11 ..... power management control circuit 12 ..... temperature sensor 13 ... central processing unit 14 ...., ... cooling fan 15 ... Alarm signal 16 .., ... Interrupt request signal 17 .. ... Instruction -14-587267 V. Description of the invention (13) 20 ..... Temperature readout 21 ..... Driving power detection circuit 22 ..... display panel on / off job detection circuit 23 ..... AC adapter insertion event detection signal 24 ..... LCD panel on / off detection signal 41 ..... power management control circuit 42 ..... temperature sensor 44 ..... cooling fan 45 ..... temperature alarm signal 46 ..... interrupt request signal 47 ..... command 48 .... CPU Processing capacity control signal 49 ... fan control command signal 50 ... temperature readout 5201 ... temperature alarm signal 15 generated 5202 ... power management control circuit 11 notifies the CPU to interrupt 5203. .... receiving interruption and reading temperature 5204 of temperature sensor 12 ..... reading temperature is equal to or greater than passive cooling point? 5205 ..... read temperature is equal to or greater than the active cooling point? S 2 0 6 ..... 1) Stop the fan 4 2) Do not implement the processing capacity control of the CPU 13 S 2 0 7 ..... 1) Stop the fan 4 2) Implement the processing capacity control of the CPU 13 -15- 587267 5 Explanation of the invention (14) S208 ..... 1) Fan rotation 2) Implementation of CPU13 processing capacity control 5301 ..... Temperature alarm signal 15 generation 5302 ..... Power management control circuit 11 notifies CPU interrupt 5303 ..... reception interruption and reading temperature 5304 of temperature sensor 12 ..... read temperature is equal to or greater than active cooling point? 5305 ..... read temperature is equal to or greater than the passive cooling point? S 3 0 6 ..... 1) Stop the fan 4 2) Implement the processing capacity control of CPU13 S 3 0 7 ..... 1) Stop the fan 2) Do not implement the processing capacity control of CPU13 S308 ..... 1) Fan rotates 2) Processing capacity control of CPU13 is not implemented -16-

Claims (1)

587267 VI. Patent application scope No. 891 21 667 "Computer cooling management and control of square fish and its device" straight @ | 案 双 考 笔 8 Shoulder M country one original) Six patent applications: =-1. A computer cooling management control The method used in a personal computer system is implemented in an active cooling mode implemented to control the rotation of a cooling fan, a passive cooling mode implemented in order to control the CPU processing capacity, or a combination of the two, compared in the system. The temperature detected by the temperature sensor installed in the system and the temperature threshold for each mode are set in advance. Therefore, the best mode is selected to implement power management, and during the system operation, the system is detected and supplied to the personal computer system. The type of power supply, and the temperature threshold setting for this modal selection is set to reflect this type. 2. The computer cooling management control method according to item 1 of the scope of patent application, wherein in the case where the power supply for the power of the system is battery power or exchanged from AC adapter to battery power, the temperature threshold is set such that the active The cooling mode is smaller than the passive cooling mode; and in the case where the power source is an AC adapter or the battery power is exchanged to the AC adapter, the temperature threshold is reset so that the active cooling mode is larger than the passive cooling mode Mode, so the selection of the best mode is implemented dynamically. 3. A computer cooling management control method used in a personal computer system, which is implemented to control the cooling fan rotation without implementing an active cooling mode, to control the CPU processing capacity to implement a passive cooling mode, or a combination of the two, And compare the temperature sensors installed in the system to detect 587267 6. The temperature range of the patent application and the temperature threshold of each mode are set in advance, so the best mode is selected, and during the system operation, the system body including the input device is detected by the pivot mechanism to rotate freely. The on / off operation of the display panel installed on the ground, and the setting of the temperature threshold for selecting this mode is formed to reflect this operation. 0 4 · Such as the computer cooling management control of the third item in the patent scope Method, in which the temperature threshold is set such that the active cooling mode is smaller than the passive cooling mode in a case where the display panel is opened for a visual state; and in a case where the display panel is in a closed state, the temperature is Restriction reset makes the active cooling mode larger than the passive cooling mode, so the selection of the optimal mode is implemented dynamically. 5. A computer cooling management control device, comprising: a fan for cooling a CPU installed in a personal computer system; a power management control circuit 9 for performing an active cooling mode by controlling the rotation of the cooling fan 5 controlling the processing capacity of the CPU Implement a passive cooling mode or a combination of both, and compare the temperature detected by a temperature sensor installed in the personal computer system, and set a temperature threshold or drive power detection circuit for each mode in advance Reset the temperature limit to implement the power management, so the best mode is selected; and the drive power detection circuit 5 which detects the type of power source that drives the system during the operation of the personal computer, and forms the temperature threshold of the mode selection値 Set to reflect this pattern. -2- 587267 6. Scope of patent application 6. A computer cooling management control device, including: a fan for cooling a CPU installed in a personal computer system; a power management control circuit for performing control to rotate the cooling fan for implementation Active cooling mode, controlling the CPU processing capacity to implement a passive cooling mode or a combination of both, and comparing the temperature detected by a temperature sensor installed in the personal computer system, and presetting for each mode Temperature threshold or the temperature threshold set by the display panel on / off operation detection circuit to implement power management and therefore select the best mode; and the display panel on / off operation detection circuit, which operates in the personal computer system In the meantime, the system body including the input device detects the opening / closing operation of the display panel installed by the pivot mechanism to be freely rotatable, and forms a temperature threshold setting for selecting each mode to reflect the operation. 587267 c? (Ρ · '> ^ L (/ especially 1¾ ii φΙΙΙΠί p 鹚 赈 ®: 6 inches inch