JPH07302136A - Electronic equipment - Google Patents

Abstract

PURPOSE:To ensure a high-speed operation of a CPU chip at a point approximate to its limit frequency by controlling the frequency of the clock supplied to the CPU chip based on the detection signal of a temperature sensor which is directly attached to the CPU chip. CONSTITUTION:A temperature sensor(S) 12 which is directly attached to a CPU chip 11 directly measures the temperature of the upper surface heating part of the chip 11 and supplies the temperature detection signal to a clock generator(CLK-GEN) 13. Then the CLK-GEN13 monitors the temperature of the chip 11 based on the detection signal of the S12 and supplies a CPU clock of a prescribed frequency set previously to the clock input terminal (Tc) of the chip 11 via a clock supply circuit 14 when the temperature of the chip 11 is lower than a set level. When the temperature of the chip 11 rises and exceeds the set level, the CLK-GEN 13 controls the frequency of the CPU clock based on the detection signal of the S12.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic device incorporating a CPU board, and more particularly to a CPU mounted on the CPU board.
The present invention relates to an electronic device characterized by a cooling control mechanism for chips or other heat-generating components.

[0002]

2. Description of the Related Art In electronic equipment such as a portable computer on which a CPU board is mounted, processing performance (processing speed) is determined by the clock frequency of the CPU. That is, the higher the clock frequency within the specified limit clock frequency range of the CPU chip, the higher the processing performance. However, if the processing speed is increased, the power consumption increases according to the clock frequency, and the heat generation amount of the CPU chip also increases accordingly.

Therefore, in a portable computer equipped with a CPU board of this type, for example, a CPU
In order to make full use of the performance of the chip, various chip cooling means for removing the heat generated in the CPU chip and suppressing the temperature rise of the CPU chip have been proposed and realized.

As a measure for suppressing the temperature rise of this type of CPU chip, conventionally, a means for detecting the ambient temperature around the CPU chip and controlling the clock frequency by the detection output has been adopted. That is, the CPU clock frequency is lowered when the ambient temperature around the CPU chip reaches the set temperature. Alternatively, the CPU clock frequency is controlled so as to be inversely proportional to the ambient temperature around the CPU chip.

However, in this type of conventional temperature control means, the heat generated in the heat generating portion of the CPU chip propagates in the surrounding air, and the temperature sensor detects the diffused ambient temperature to control the clock. Therefore, the CPU
It takes a relatively long time to reflect the heat generation of the chip in the frequency control of the CPU clock, and the accurate temperature of the heat generation part cannot be detected. Since a large margin of marginal temperature must be taken, the CPU
The chip cannot be operated near the limit frequency.
Therefore, conventionally, there has been a problem that the performance of the CPU chip cannot be sufficiently exhibited and high-speed processing by the CPU clock cannot be realized near the limit frequency.

Further, when the temperature of the CPU chip reaches a high temperature at which normal operation cannot be maintained, unless the system operation is stopped at that time, not only data destruction during processing but also hardware and software abnormalities are caused. However, the failure may be difficult to recover.

Further, when the portable computer is mounted on a function expansion unit for expanding its function, the heat dissipation port of the portable computer is blocked by the function expansion unit and the heat generated by the function expansion unit is indirectly received. When used for a long time, the temperature inside the housing of the portable computer may rise abnormally depending on the surrounding environment, which may cause data destruction during processing, hardware abnormality, and the like.

[0008]

As described above, in the conventional CPU temperature control means, there is a relatively large time lag until the heat generation temperature of the CPU chip is reflected in the CPU clock control. Since the temperature cannot be detected with high accuracy, the temperature of the CPU chip cannot be finely controlled, and there is a problem that the CPU chip cannot operate stably at high speed near the limit frequency where the performance of the CPU chip is fully utilized. Was there.

Further, when the temperature of the CPU chip reaches a high temperature at which normal operation cannot be maintained, if the system operation is not stopped at that time, not only data corruption during processing but also hardware and software abnormalities will occur. However, there is a possibility that the failure may be difficult to recover. In addition, when the portable computer is mounted on a function expansion unit that expands its functions, the heat dissipation port of the portable computer is blocked by the function expansion unit, and the heat generated by the function expansion unit is indirectly received, resulting in a long time. When used, the temperature inside the housing of the portable computer may rise abnormally depending on the surrounding environment, which may lead to data destruction during processing, hardware abnormality, and the like.

The present invention has been made in view of the above circumstances,
In an electronic device that mounts a CPU board, the heat generation temperature of the CPU chip is quickly and accurately reflected in the temperature control of the chip, and the performance of the CPU chip is fully utilized to create a CP
It is an object of the present invention to provide an electronic device capable of operating a U chip at high speed near a limit frequency.

[0011]

[Means and Actions for Solving the Problems]
In an electronic device incorporating a U board, a circuit for supplying a clock to a CPU chip, a temperature sensor directly attached to the CPU chip, and a circuit for controlling the frequency of the clock based on a detection signal of the temperature sensor. It is characterized by comprising:

With this configuration, the frequency of the clock supplied to the CPU chip is controlled based on the detection signal of the temperature sensor directly attached to the CPU chip.
The heat generation temperature of the CPU chip can be directly reflected in the temperature control of the chip by controlling the clock frequency.
The CPU chip can be operated at high speed near the limit frequency by fully utilizing the performance of the chip.

Further, according to the present invention, in an electronic device having a built-in CPU board, a circuit for supplying a clock to the CPU chip, a temperature sensor provided in a CPU chip mounting portion of the CPU board, and detection of this temperature sensor. And a circuit for controlling the frequency of the clock based on a signal.

With such a configuration, the C of the CPU board is
Since the frequency of the clock supplied to the CPU chip is controlled based on the detection signal of the temperature sensor provided in the PU chip mounting portion, the heat generation temperature of the CPU chip can be immediately reflected in the temperature control of the chip. Therefore, the CPU chip can be operated at high speed near the limit frequency by fully utilizing the performance of the CPU chip.

Further, according to the present invention, in an electronic device having a built-in CPU board, a circuit for supplying a clock to the CPU chip, a fin for removing heat from the CPU chip, a temperature sensor provided on the fin, and And a circuit that controls the frequency of the clock based on the detection signal of the temperature sensor.

With such a configuration, the CPU is detected based on the detection signal of the temperature sensor provided on the fin of the CPU chip.
Since the frequency of the clock supplied to the chip is controlled, the heat generation temperature of the CPU chip can be immediately reflected in the temperature control of the chip, and the performance of the CPU chip can be fully utilized to limit the frequency of the CPU chip. Can operate at high speed in the vicinity.

Further, according to the present invention, in an electronic device having a built-in CPU board, a circuit for supplying a clock to a CPU chip, a heat conductor for transmitting heat of the CPU chip, and a CPU via the heat conductor. It is characterized by comprising a temperature sensor for detecting the temperature of the chip and a circuit for controlling the frequency of the clock based on the detection signal of the temperature sensor.

With such a configuration, the frequency of the clock supplied to the CPU chip is controlled based on the detection signal of the temperature sensor provided in the heat conductor that transfers the heat of the CPU chip. The heat generation temperature can be immediately reflected in the temperature control of the chip, and the CPU chip can be operated at high speed near the limit frequency by fully utilizing the performance of the CPU chip.

Further, according to the present invention, in an electronic device having a built-in CPU board, a fan for cooling the CPU chip by air and a C
It is characterized by comprising a temperature sensor directly attached to the PU chip and a circuit for driving and controlling the fan based on a detection signal of the temperature sensor.

With this configuration, the fan for cooling the CPU chip is drive-controlled based on the detection signal of the temperature sensor directly attached to the CPU chip, so that the heat generation temperature of the CPU chip can be directly determined by the temperature of the chip. This can be reflected in control, and the CPU chip can operate at high speed near the limit frequency by fully utilizing the performance of the CPU chip.

Further, the present invention provides a fan for air-cooling a CPU chip in an electronic device incorporating a CPU board, and a C
It is characterized by comprising a temperature sensor provided in the CPU chip mounting portion of the PU board and a circuit for driving and controlling the fan based on a detection signal of the temperature sensor.

With this configuration, the C of the CPU board is
Since the fan that cools the CPU chip is driven and controlled based on the detection signal of the temperature sensor provided in the PU chip mounting portion, the heat generation temperature of the CPU chip can be immediately reflected in the temperature control of the chip, By making full use of the performance of the CPU chip, the CPU chip can operate at high speed near the limit frequency.

Further, according to the present invention, in an electronic device having a built-in CPU board, a fin that removes heat from the CPU chip, a temperature sensor provided on the fin, and a fan that cools the CPU chip via the fin are provided. And a circuit for driving and controlling the fan based on the detection signal of the temperature sensor.

With such a configuration, the CPU is detected based on the detection signal of the temperature sensor provided on the fin of the CPU chip.
Since the fan that cools the chip is driven and controlled, C
The heat generation temperature of the PU chip can be immediately reflected in the temperature control of the chip, and the CPU chip can be operated at high speed near the limit frequency by fully utilizing the performance of the CPU chip.

Further, according to the present invention, in an electronic device having a built-in CPU board, a heat conductor for transmitting heat of the CPU chip, and a temperature sensor for detecting the temperature of the CPU chip via the heat conductor, A fan for cooling the CPU chip via the heat conductor and a circuit for driving and controlling the fan based on a detection signal of the temperature sensor are provided.

With this configuration, the CP is detected based on the detection signal of the temperature sensor provided on the heat conductor of the CPU chip.
Since the fan that cools the U-chip is driven and controlled,
The heat generation temperature of the CPU chip can be immediately reflected in the temperature control of the chip, and the CPU chip can be operated at high speed near the limit frequency by fully utilizing the performance of the CPU chip.

Further, according to the present invention, in a portable computer having a suspend / resume function, a temperature sensor for detecting the temperature of the CPU chip, and a control means for executing suspend processing based on the detection signal of the temperature sensor. It is characterized by comprising.

With this configuration, when the temperature of the CPU chip reaches a high temperature at which normal operation cannot be maintained, that is, when the temperature sensor detects the operation limit temperature of the CPU chip, the suspend process is executed to perform normal operation. When it becomes possible to maintain the state, it is possible to restore the processing state at the time of interruption and continue the processing, so that highly reliable operation can be maintained.

Further, according to the present invention, in a function expansion unit for expanding the function of a portable computer, a sensor for detecting a built-in chip temperature of the portable computer mounted in the unit and cooling air for the mounted portable computer are provided. It is characterized by comprising a blowing fan and an air blowing port, and control means for driving and controlling the fan based on a detection signal of the temperature sensor.

With such a configuration, the cooling action of the portable computer can cover the decrease in heat radiation of the portable computer when the portable computer is mounted on the function extending unit, and the highly reliable function extending operation can be maintained.

[0031]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing a first embodiment of the present invention. In FIG. 1, reference numeral 10 is a CPU board having a CPU mounting circuit pattern. 11 is this CPU board 10
CPU chip mounted at the CPU mounting position of
CP via PU connector or directly by soldering
It is mounted on the CPU mounting position of the U board 10.

Reference numeral 12 denotes a temperature sensor (S) directly attached to the CPU chip 11. Here, the temperature of the heat generating portion on the upper surface of the CPU chip 11 is directly measured. A clock generator (CLK-GEN) 13 supplies an operation clock (CPU clock) to the CPU chip 11, and controls the frequency of the CPU clock based on the detection signal of the temperature sensor (S) 12. Here, when the temperature detected by the temperature sensor (S) 12 rises above the set temperature, the frequency of the CPU clock decreases as the temperature rises.

Reference numeral 14 is a circuit for supplying a CPU clock to the CPU chip 11, which is a clock generator (CLK-G).
EN) 13 CPU clock generated by CPU chip 1
1 to the clock input terminal (Tc).

In the above structure, the temperature sensor (S) 12 directly attached to the CPU chip 11 is the CPU chip 11
The temperature of the heat-generating portion on the upper surface of is directly measured, and the temperature detection signal is supplied to the clock generator (CLK-GEN) 13.

Clock generator (CLK-GEN) 13
Monitors the temperature of the CPU chip 11 based on the detection signal of the temperature sensor (S) 12, and when the temperature of the CPU chip 11 is equal to or lower than the set temperature, C of the preset specified frequency is set.
The PU clock is supplied to the clock input terminal (Tc) of the CPU chip 11 via the clock supply circuit 14.

After that, when the temperature of the CPU chip 11 rises and exceeds the set temperature, the clock generator (CLK-G
The EN) 13 controls the frequency of the CPU clock based on the detection signal of the temperature sensor (S) 12. That is, here, when the temperature detected by the temperature sensor (S) 12 rises above the set temperature, the frequency of the CPU clock is lowered along with the temperature rise. This CPU clock is supplied via the clock supply circuit 14 to the clock input terminal (T
c) is entered.

As described above, the frequency of the CPU clock supplied to the CPU chip 11 is controlled based on the detection signal of the temperature sensor (S) 12 directly attached to the CPU chip 11. The heat generation temperature can be reflected directly (accurately with no time delay) in the temperature control by the clock frequency control of the CPU chip 11.
As a result, the CPU chip 11 can operate at high speed near the limit frequency by fully utilizing the performance of the CPU chip 11.

FIG. 2 is a block diagram showing a second embodiment of the present invention. In FIG. 2, 20 is a CPU board having a CPU mounting circuit pattern, and 21 is a CPU chip mounted on the CPU mounting position of the CPU board 20.

Reference numeral 22 is a temperature sensor (S) provided in the CPU chip mounting portion of the CPU board 10, and here, C
The temperature of the lower surface heat generating portion of the PU chip 21 is measured directly or at a short distance.

Reference numeral 23 is a clock generator (CL) for supplying an operation clock (CPU clock) to the CPU chip 21.
K-GEN), which controls the frequency of the CPU clock based on the detection signal of the temperature sensor (S) 22. Here, when the temperature detected by the temperature sensor (S) 22 rises above the set temperature, the frequency of the CPU clock decreases as the temperature rises.

Reference numeral 24 is a circuit for supplying a CPU clock to the CPU chip 21, which is a clock generator (CLK-G).
EN) 23 CPU clock generated by CPU chip 2
1 to the clock input terminal (Tc).

In the above structure, C of the CPU board 20
Temperature sensor (S) 22 provided in the PU chip mounting part
Measures the temperature of the bottom surface heat generating portion of the CPU chip 21 directly or at a short distance, and supplies the temperature detection signal to the clock generator (CLK-GEN) 23.

Clock generator (CLK-GEN) 23
Monitors the temperature of the CPU chip 21 based on the detection signal of the temperature sensor (S) 22, and when the temperature of the CPU chip 21 is equal to or lower than the set temperature, C of the preset specified frequency is set.
The PU clock is supplied to the clock input terminal (Tc) of the CPU chip 21 via the clock supply circuit 24.

After that, when the temperature of the CPU chip 21 rises and exceeds the set temperature, the clock generator (CLK-
The GEN) 23 controls the frequency of the CPU clock based on the detection signal of the temperature sensor (S) 22. That is, here, when the temperature detected by the temperature sensor (S) 22 rises, the frequency of the CPU clock is lowered accordingly. This CPU
The clock is input to the clock input terminal (Tc) of the CPU chip 21 via the clock supply circuit 24.

As described above, since the frequency of the CPU clock supplied to the CPU chip 21 is controlled based on the detection signal of the temperature sensor (S) 22 provided in the CPU chip mounting portion of the CPU board 10, CPU temperature of CPU chip 21 immediately (correctly without time delay)
It can be reflected in the temperature control by controlling the clock frequency of the chip 21. As a result, the CPU chip 21 can be operated at high speed near the limit frequency by fully utilizing the performance of the CPU chip 21.

FIG. 3 is a block diagram showing a third embodiment of the present invention. In FIG. 3, reference numeral 30 denotes a CPU board having a CPU mounting circuit pattern. Reference numeral 31 denotes a CPU chip mounted on the CPU mounting position of the CPU board 30, and has fins (F) for radiating heat generated in the chip provided on the upper surface of the chip.

Reference numeral 32 denotes a temperature sensor (S) directly attached to the fin (F) of the CPU chip 31. Here, the temperature of the fin (F) is directly measured, so that the CPU chip 3
The temperature of the heat generating part of 1 is detected.

Reference numeral 33 is a clock generator (CL) for supplying an operation clock (CPU clock) to the CPU chip 31.
K-GEN), and controls the frequency of the CPU clock based on the detection signal of the temperature sensor (S) 32. Here, when the temperature detected by the temperature sensor (S) 32 rises above the set temperature, the frequency of the CPU clock decreases as the temperature rises.

Reference numeral 34 is a circuit for supplying a CPU clock to the CPU chip 31, which is a clock generator (CLK-G).
EN) 33 CPU clock generated by CPU chip 3
1 to the clock input terminal (Tc).

In the above structure, the temperature sensor (S) 32 directly attached to the fin (F) of the CPU chip 31 measures the temperature of the fin (F) directly, so that the temperature of the heat generating portion of the CPU chip 31 is reduced. The temperature is detected, and the temperature detection signal is supplied to the clock generator (CLK-GEN) 33.

Clock generator (CLK-GEN) 33
Monitors the temperature of the CPU chip 31 based on the detection signal of the temperature sensor (S) 12, and when the temperature of the CPU chip 31 is equal to or lower than the set temperature, C of the preset specified frequency is set.
The PU clock is supplied to the clock input terminal (Tc) of the CPU chip 31 via the clock supply circuit 34.

After that, when the temperature of the CPU chip 31 rises and exceeds the set temperature, the clock generator (CLK-G
The EN) 33 controls the frequency of the CPU clock based on the detection signal of the temperature sensor (S) 32. That is, here, when the temperature detected by the temperature sensor (S) 32 rises above the set temperature, the frequency of the CPU clock is lowered along with the temperature rise. This CPU clock is supplied to the clock input terminal (T
c) is entered.

In this way, the frequency of the CPU clock supplied to the CPU chip 31 is controlled based on the detection signal of the temperature sensor (S) 32 directly attached to the fin (F) of the CPU chip 31. The heat generation temperature of the CPU chip 31 can be immediately reflected on the temperature control by the clock frequency control of the CPU chip 31 (that is, the delay time can be greatly shortened and accurately). As a result, the performance of the CPU chip 31 can be fully utilized to allow the CPU chip to operate at high speed near the limit frequency.

FIG. 4 is a block diagram showing a fourth embodiment of the present invention. In FIG. 4, reference numeral 40 denotes a CPU board having a CPU mounting circuit pattern. Reference numeral 41 denotes a CPU chip mounted on the CPU mounting position of the CPU board 40. Here, a heat conductor (H) for transmitting heat generated in the chip is provided on the upper surface of the chip.

Reference numeral 42 denotes a temperature sensor (S) directly attached to the heat conductor (H). Here, the temperature of the heat conductor (H) is directly measured to measure the temperature of the heat generating portion of the CPU chip 41. To detect.

Reference numeral 43 is a clock generator (CL) for supplying an operation clock (CPU clock) to the CPU chip 41.
K-GEN), and controls the frequency of the CPU clock based on the detection signal of the temperature sensor (S) 42. Here, when the temperature detected by the temperature sensor (S) 42 rises above the set temperature, the frequency of the CPU clock decreases as the temperature rises.

Reference numeral 44 denotes a circuit for supplying a CPU clock to the CPU chip 41, which is a clock generator (CLK-G
EN) 43 CPU clock generated by the CPU chip 4
1 to the clock input terminal (Tc).

In the above-mentioned structure, the temperature sensor (S) 42 directly attached to the heat conductor (H) directly measures the temperature of the heat conductor (H) to generate heat in the CPU chip 41. Of the temperature is detected, and the detection signal is supplied to the clock generator (CLK-GEN) 43.

Clock generator (CLK-GEN) 43
Monitors the temperature of the CPU chip 41 based on the detection signal of the temperature sensor (S) 42. At this time, when the temperature of the CPU chip 41 is equal to or lower than the set temperature, the CPU clock of a preset specified frequency is set. It is supplied to the clock input terminal (Tc) of the CPU chip 41.

After that, when the temperature of the CPU chip 41 rises and exceeds the set temperature, the clock generator (CLK-
The GEN) 43 controls the frequency of the CPU clock based on the temperature indicated by the detection signal of the temperature sensor (S) 42. That is, here, when the temperature detected by the temperature sensor (S) 42 rises above the set temperature, the frequency of the CPU clock decreases as the temperature rises.

This CPU clock is supplied to the clock supply circuit 4
Clock input terminal (Tc
) Is entered. In this way, the CPU chip 41 is based on the detection signal of the temperature sensor (S) 42 directly attached to the heat conductor (H) that transfers the heat generated in the CPU chip 41.
Since the frequency of the CPU clock supplied to the CPU chip 41 is controlled, the heat generation temperature of the CPU chip 41 is immediately (that is, the delay time is shortened significantly and accurately) reflected in the temperature control by the clock frequency control of the CPU chip 41. be able to. As a result, the CPU chip 41 can be operated at high speed near the limit frequency by fully utilizing the performance of the CPU chip 41.

FIG. 5 is a block diagram showing a fifth embodiment of the present invention. In FIG. 5, reference numeral 50 is a CPU board having a CPU mounting circuit pattern, and reference numeral 51 is a CPU chip mounted on the CPU mounting position of the CPU board 50.

Reference numeral 52 is a temperature sensor (S) directly attached to the CPU chip 51, and here directly detects the temperature of the heat generating portion of the CPU chip 51. 53 is a CPU chip 51
An air-cooling fan that blows cooling air onto the fan 54 is a fan drive control circuit (DRV) that drives and controls the air-cooling fan 53 based on a detection signal from the temperature sensor (S) 52.

This fan drive control circuit (DRV) 54
When the temperature detected by the temperature sensor (S) 52 reaches a set value, the fan 53 for air cooling is driven to blow cooling air to the CPU chip 51.

In the above structure, the surface temperature of the CPU chip 51 is detected by the temperature sensor (S) 52, and the detection signal is supplied to the fan drive control circuit (DRV) 54.
The fan drive control circuit (DRV) 54 is a temperature sensor (S)
When the detected temperature of 52 reaches the set temperature, the air-cooling fan 53 is driven to blow cooling air to the CPU chip 51.

As described above, since the fan 53 for air-cooling the CPU chip 51 is directly driven and controlled based on the detection signal of the temperature sensor (S) 52 directly attached to the CPU chip 51, the CPU chip Immediately heating temperature of 51 (that is, greatly reducing delay time) CPU chip 51
Can be reflected in the cooling control. This gives C
By fully utilizing the performance of the PU chip 51, the CPU chip can operate at high speed near the limit frequency.

FIG. 6 is a block diagram showing a sixth embodiment of the present invention. In FIG. 6, reference numeral 60 is a CPU board having a CPU mounting circuit pattern, and 61 is a CPU chip mounted on the CPU mounting position of the CPU board 60.

Reference numeral 62 denotes a temperature sensor (S) provided in the CPU chip mounting portion of the CPU chip 61, and here, the temperature of the chip heat generating portion is directly detected from the lower surface of the CPU chip 61.

Reference numeral 63 is an air-cooling fan for blowing cooling air onto the CPU chip 61, and 64 is a temperature sensor (S) 6
It is a fan drive control circuit (DRV) that controls the drive of the fan 63 for air cooling based on the detection signal of 2.

This fan drive control circuit (DRV) 64
When the temperature detected by the temperature sensor (S) 62 reaches a set value, the fan 63 for air cooling is driven to blow cooling air to the CPU chip 61.

In the above structure, the temperature of the CPU chip 61 is detected by the temperature sensor (S) 62, and the detection signal is supplied to the fan drive control circuit (DRV) 64. The fan drive control circuit (DRV) 64 is a temperature sensor (S) 62.
When the detected temperature of the fan reaches the set temperature, the fan 63 for air cooling
Is driven to blow cooling air to the CPU chip 61.

As described above, the fan 63 for air-cooling the CPU chip 61 is directly driven and controlled based on the detection signal of the temperature sensor (S) 62 directly attached to the CPU chip 61. The heat generation temperature of 61 can be immediately reflected in the cooling control of the CPU chip 61 (by greatly reducing the delay time). This allows the CPU
By fully utilizing the performance of the chip 61, the CPU chip can operate at high speed near the limit frequency.

FIG. 7 is a block diagram showing a seventh embodiment of the present invention. In FIG. 7, 70 is a CPU board having a CPU mounting circuit pattern. Reference numeral 71 denotes a CPU chip mounted on the CPU mounting position of the CPU board 70, and fins (F) that remove heat from the chip are provided on the upper surface of the chip.

Reference numeral 72 denotes a temperature sensor (S) directly attached to the fin (F) of the CPU chip 71. In this case, the temperature of the fin (F) is directly measured, so that the CPU chip 7
The temperature of the heat generating part of 1 is detected.

Reference numeral 73 is an air cooling fan for blowing cooling air to the CPU chip 71, and 74 is a temperature sensor (S) 7
It is a fan drive control circuit (DRV) that drives and controls the fan 73 for air cooling based on the detection signal of 2.

This fan drive control circuit (DRV) 74
When the temperature detected by the temperature sensor (S) 72 reaches a set value, the fan 73 for air cooling is driven to blow cooling air to the CPU chip 71.

In the above structure, the temperature of the CPU chip 71 is detected by the temperature sensor (S) 72, and the detection signal is supplied to the fan drive control circuit (DRV) 74. The fan drive control circuit (DRV) 74 is a temperature sensor (S) 72.
When the detected temperature of the fan reaches the set temperature, the fan 73 for air cooling
Is driven to blow cooling air to the CPU chip 71.

As described above, the temperature sensor (S) 72 directly attached to the fin (F) that radiates the heat of the CPU chip 71.
Since the fan 73 that cools the CPU chip 71 is directly driven and controlled based on the detection signal of
The heat generation temperature of the chip 71 can be immediately reflected in the cooling control of the CPU chip 71. This allows the CPU chip 71 to operate at high speed near the limit frequency by fully utilizing the performance of the CPU chip 71.

FIG. 8 is a block diagram showing an eighth embodiment of the present invention. In FIG. 8, reference numeral 80 is a CPU board having a CPU mounting circuit pattern. Reference numeral 81 denotes a CPU chip mounted on the CPU mounting position of the CPU board 80. Here, a heat conductor (H) that transfers heat generated in the chip is provided on the upper surface of the chip.

Reference numeral 82 is a heat conductor (H) of the CPU chip 81.
The temperature sensor (S) directly attached to the CPU chip 81 detects the temperature of the heat generating portion of the CPU chip 81 by directly measuring the temperature of the heat conductor (H).

Reference numeral 83 is an air-cooling fan for blowing cooling air to the CPU chip 81, and 84 is a temperature sensor (S) 8
It is a fan drive control circuit (DRV) that drives and controls the fan 83 for air cooling based on the detection signal of 2.

This fan drive control circuit (DRV) 84
When the temperature detected by the temperature sensor (S) 82 reaches a set value, the fan 83 for air cooling is driven to blow cooling air to the CPU chip 81.

In the above structure, the temperature of the CPU chip 81 is detected by the temperature sensor (S) 82, and the detection signal is supplied to the fan drive control circuit (DRV) 84. The fan drive control circuit (DRV) 84 is a temperature sensor (S) 82.
When the detected temperature of the fan reaches the set temperature, the fan 83 for air cooling
Is driven to blow cooling air to the CPU chip 81.

In this way, the fan 83 for cooling the CPU chip 81 is directly driven and controlled based on the detection signal of the temperature sensor (S) 82 directly attached to the heat conductor (H) of the CPU chip 81. Therefore, the CPU chip 81
The heat generation temperature can be immediately reflected in the cooling control of the CPU chip 81. As a result, the performance of the CPU chip 81 can be fully utilized and the CPU chip can operate at high speed near the limit frequency.

FIG. 9 is a block diagram showing a ninth embodiment of the present invention. In the ninth embodiment, in a portable computer having a suspend / resume function, a CPU
It has a control means for detecting the temperature of the chip with a temperature sensor and executing a suspend process when the temperature sensor detects the operation limit temperature of the CPU chip.

In FIG. 9, reference numeral 91 is a CPU (CPU chip) that controls the entire system, and a main memory (MEM) 94, a storage memory 95, and various input / output devices (via a system bus). I / O) is connected.

Reference numeral 92 denotes a temperature sensor (S) for measuring the chip temperature of the CPU 91, and here, as an example, it is assumed that it is directly attached to the chip as shown in FIG. 1 or 2. Reference numeral 93 denotes an interrupt generation unit (IRG) that monitors the temperature detected by the temperature sensor (S) 92 and generates a forced interrupt when the detected temperature reaches a predetermined operating limit temperature. When the operating limit temperature is reached, a forced interrupt is issued to the CPU 91.

Reference numeral 95 denotes a suspend / resume processing unit (S / R) resident in the main memory (MEM) 94, which is activated when the power is turned on / off when the resume mode is set in the setup. .

The suspend / resume function itself is the same as that of a normal personal computer. However, in this embodiment, regardless of the settings of the resume mode, if the interrupt generator (IRG) 93 generates a forced interrupt. The suspend / resume processing unit is forcibly activated to execute the suspend processing. After the execution of the suspend process is completed, the power is shut off (power off).
After that, when the power is turned on (power on), the resume process is executed, the process state at the time of the interruption is restored, and the process after the interruption can be continued.

In the above structure, the temperature sensor (S) 92
Measures the chip temperature of the CPU 91 and supplies the temperature detection signal to the interrupt generator (IRG) 93. The interrupt generation unit (IRG) 93 monitors the temperature detected by the temperature sensor (S) 92, and when the detected temperature reaches a predetermined operation limit temperature, generates a forced interrupt to the CPU 91.

The CPU 91 uses the interrupt generator (IRG) 93
When the forced interrupt is further received, the processing is terminated at an appropriate processing stage, the suspend / resume processing unit (S / R) 95 is activated, and the suspend processing is executed. The data by this suspend processing is saved in the save memory 95.

As described above, when the chip temperature of the CPU 91 reaches a high temperature at which the normal operation cannot be maintained, the suspend processing is executed, and when the normal operation can be maintained, the processing state at the time of interruption is restored. Since the process can be restored and the process can be continued, highly reliable operation can be maintained.

FIG. 10 is a block diagram showing a ninth embodiment of the present invention. In the tenth embodiment, in an expansion unit for expanding the function of a portable computer, a sensor for detecting a built-in chip temperature of the portable computer mounted in the unit and a fan for blowing cooling air to the mounted portable computer are installed. And an air outlet and a control means for driving and controlling the fan based on the detection signal of the temperature sensor to cover a reduction in heat dissipation of the portable computer when the portable computer is mounted on the function expansion unit. Thus, it is possible to maintain a highly reliable function expanding operation.

In FIG. 10, reference numeral 100 denotes an expansion unit for expanding the function of the portable computer, and 200
Is a portable computer installed in the expansion unit 100.

Reference numeral 101 denotes a temperature sensor (S) provided in the portable computer mounting portion of the expansion unit 100, and here, two sensors monitor the internal temperature of the portable computer.

Reference numeral 102 denotes a ventilation port CA of the portable computer 200 mounted in the portable computer mounting section.
Is a fan for air cooling that sends cooling air through the ventilation port CB, and 103 is a fan drive control circuit (drive control circuit for driving the air cooling fan 102 based on detection signals of the temperature sensors (S) 101, 101). DRV).

This fan drive control circuit (DRV) 103
When the temperature detected by the temperature sensors (S) 101, 101 reaches a set value, the fan 102 for air cooling is driven to send cooling air to the portable computer 200 via the ventilation openings CA, CB.

In the above configuration, the internal temperature of the portable computer 200 mounted in the portable computer mounting portion of the expansion unit 100 is the temperature sensor (S) 10.
1, 101, and the respective detection signals are supplied to the fan drive control circuit (DRV) 103.

When the temperature detected by one of the temperature sensors (S) 101, 101 reaches the set temperature, the fan drive control circuit (DRV) 103 drives the air-cooling fan 102 so that the portable computer 200 is provided with a ventilation port CA. , CB to send cooling air.

By having such a cooling mechanism for the portable computer, the portable computer 200
The heat dissipation reduction of the portable computer 200 when mounted on the expansion unit 100 can be covered, and a highly reliable function expansion operation can be maintained.

FIG. 11 is a block diagram showing an eleventh embodiment of the present invention. The eleventh embodiment is a combination of the second embodiment shown in FIG. 2 and the sixth embodiment shown in FIG. 6, and here, a part of the sixth embodiment is added to the second embodiment. The configuration is shown, and the same components are denoted by the same reference numerals and description thereof is omitted.

In the eleventh embodiment, the temperature sensor (S) 22 provided in the CPU chip mounting portion of the CPU board 20 measures the temperature of the lower surface heat generating portion of the CPU chip 21 directly or at a close distance. The temperature detection signal is supplied to the clock generator (CLK-GEN) 23 and the fan drive control circuit (DRV) 64.

Clock generator (CLK-GEN) 23
Monitors the temperature of the CPU chip 21 based on the detection signal of the temperature sensor (S) 22, and when the temperature of the CPU chip 21 is equal to or lower than the set temperature, C of the preset specified frequency is set.
The PU clock is supplied to the clock input terminal (Tc) of the CPU chip 21 via the clock supply circuit 24.

Further, the fan drive control circuit (DRV) 64
Monitors the temperature of the CPU chip 21 based on the detection signal of the temperature sensor (S) 22, and when the temperature of the CPU chip 21 is below the set temperature, the fan 63 is stopped.

After that, the fan drive control circuit (DRV) 6
When the temperature detected by the temperature sensor (S) 22 reaches a set temperature, the No. 4 drives the fan 63 to blow cooling air to the CPU chip 21.

The clock generator (CLK-GE
N) 23 controls the frequency of the CPU clock based on the detection signal of the temperature sensor (S) 22 when the temperature of the CPU chip 21 rises and exceeds the set temperature. That is, here, when the temperature detected by the temperature sensor (S) 22 rises, the frequency of the CPU clock is lowered accordingly. This CPU clock is supplied to the CPU chip 2 via the clock supply circuit 24.
1 is input to the clock input terminal (Tc).

At this time, the fan drive control circuit (DRV) 6
Clock generator (CLK-GEN) 2 set temperature of 4
By setting the temperature lower than the set temperature of 3, the fan 63 is driven before the clock generator (CLK-GEN) 23 reduces the CPU clock, and the CPU chip 21
Since the CPU chip is cooled, the CPU chip can be operated at high speed for a long time in the vicinity of the limit frequency, and the set temperature of the fan drive control circuit (DRV) 64 and the set temperature of the clock generator (CLK-GEN) 23 can be adjusted. If they are set to be equal, cooling by the fan 63 and reduction of the CPU clock are started at the same time, and it is possible to return to the high-speed CPU clock state in a short time.

In the above-mentioned embodiment, except for FIG.
Although only one temperature sensor is shown, a plurality of temperature sensors may be provided in a scattered manner. Further, at this time, the temperature sensors may be installed at, for example, FIGS. 1, 2, 3, and 4. Or any combination of FIG. 1, FIG. 2, FIG. 3, and FIG. 4 and another installation location (for example, the inner wall of the housing).

[0109]

As described above in detail, according to the present invention, C
In an electronic device having a built-in PU board, a circuit for supplying a clock to a CPU chip, a temperature sensor directly attached to the CPU chip, and a circuit for controlling the frequency of the clock based on a detection signal of the temperature sensor. And CP
By controlling the frequency of the clock supplied to the CPU chip based on the detection signal of the temperature sensor directly attached to the U chip, the heat generation temperature of the CPU chip is controlled directly by the clock frequency control. The CPU chip can be operated at high speed near the limit frequency by fully utilizing the performance of the CPU chip.

Further, according to the present invention, in an electronic device having a built-in CPU board, a circuit for supplying a clock to the CPU chip, a temperature sensor provided in the CPU chip mounting portion of the CPU board, and this temperature sensor. And a circuit for controlling the frequency of the clock based on the detection signal of
By controlling the frequency of the clock supplied to the CPU chip based on the detection signal of the temperature sensor provided in the CPU chip mounting part of the PU board, the heat generation temperature of the CPU chip is immediately controlled. The CPU chip can be operated at high speed near the limit frequency by fully utilizing the performance of the CPU chip.

Further, according to the present invention, in an electronic device having a built-in CPU board, a circuit for supplying a clock to the CPU chip, a fin for removing heat from the CPU chip, and a temperature sensor provided on the fin are provided. A circuit for controlling the frequency of the clock based on the detection signal of the temperature sensor, and the frequency of the clock supplied to the CPU chip based on the detection signal of the temperature sensor provided on the fin of the CPU chip. By controlling the temperature of the CPU chip, the heat generation temperature of the CPU chip can be immediately reflected in the temperature control of the chip, and the performance of the CPU chip can be fully utilized.
The CPU chip can operate at high speed near the limit frequency.

Further, according to the present invention, in an electronic device having a built-in CPU board, a circuit for supplying a clock to the CPU chip, a heat conductor for transferring heat of the CPU chip,
A thermal sensor for detecting the temperature of the CPU chip via the heat conductor and a circuit for controlling the frequency of the clock based on the detection signal of the temperature sensor are provided. Since the frequency of the clock supplied to the CPU chip is controlled based on the detection signal of the temperature sensor provided on the body, the heat generation temperature of the CPU chip can be immediately reflected in the temperature control of the chip. , CP by fully utilizing the performance of CPU chips
The U chip can operate at high speed near the limit frequency.

Further, according to the present invention, in an electronic device having a built-in CPU board, a fan for cooling the CPU chip, a temperature sensor directly attached to the CPU chip, and a detection signal of the temperature sensor are used as a basis. The circuit for controlling the drive of the fan is provided, and the fan for cooling the CPU chip is drive-controlled based on the detection signal of the temperature sensor directly attached to the CPU chip. Can be directly reflected in the temperature control of the chip, and by fully utilizing the performance of the CPU chip,
Allows the chip to operate at high speed near the limit frequency.

Further, according to the present invention, in an electronic device having a built-in CPU board, a fan for air-cooling the CPU chip, a temperature sensor provided in the CPU chip mounting portion of the CPU board, and detection of this temperature sensor are provided. A circuit for driving and controlling the fan based on a signal is provided, and the fan for cooling the CPU chip is driven and controlled based on a detection signal of a temperature sensor provided in a CPU chip mounting portion of the CPU board. As a result, the heat generation temperature of the CPU chip can be immediately reflected in the temperature control of the chip.
The CPU chip can be operated at high speed near the limit frequency by fully utilizing the performance of the chip.

Further, according to the present invention, in an electronic device having a built-in CPU board, a fin that removes heat from the CPU chip, a temperature sensor provided on the fin, and the CPU chip is cooled through the fin. And a circuit for driving and controlling the fan based on the detection signal of the temperature sensor, and a fan for cooling the CPU chip based on the detection signal of the temperature sensor provided on the fin of the CPU chip. With the drive control configuration, the heat generation temperature of the CPU chip can be immediately reflected in the temperature control of the chip, and by fully utilizing the performance of the CPU chip, the CP
The U chip can operate at high speed near the limit frequency.

Further, according to the present invention, in an electronic device having a built-in CPU board, a heat conductor for transmitting heat of the CPU chip and a temperature sensor for detecting the temperature of the CPU chip via the heat conductor. And a fan for cooling the CPU chip via the heat conductor, and a circuit for driving and controlling the fan based on a detection signal of the temperature sensor.
The heating temperature of the CPU chip is immediately reflected in the temperature control of the chip by the drive control of the fan that cools the CPU chip based on the detection signal of the temperature sensor provided in the heat conductor of the U chip. Therefore, the CPU chip can be operated at high speed near the limit frequency by fully utilizing the performance of the CPU chip.

According to the present invention, in the portable computer having the suspend / resume function, the CP
The temperature sensor for detecting the temperature of the U chip and the control means for executing the suspend process based on the detection signal of the temperature sensor are provided. When the temperature of the CPU chip reaches a high temperature at which normal operation cannot be maintained, the suspend process is performed. With the configuration that executes processing, when the normal operation can be maintained, the suspend processing can be forcibly executed and the processing status when interrupted after that can be restored, so that highly reliable operation is maintained. it can.

Further, according to the present invention, in the function expansion unit for expanding the function of the portable computer, the sensor for detecting the built-in chip temperature of the portable computer mounted on the unit and the cooling for the mounted portable computer are provided. The portable computer is mounted on the function expansion unit by including a fan that blows air and an air outlet, and a control unit that drives and controls the fan based on the detection signal of the temperature sensor. It is possible to cover the decrease in heat dissipation of the portable computer in case of a failure and maintain a highly reliable function expansion operation.

[Brief description of drawings]

FIG. 1 is a block diagram showing a first embodiment of the present invention.

FIG. 2 is a block diagram showing a second embodiment of the present invention.

FIG. 3 is a block diagram showing a third embodiment of the present invention.

FIG. 4 is a block diagram showing a fourth embodiment of the present invention.

FIG. 5 is a block diagram showing a fifth embodiment of the present invention.

FIG. 6 is a block diagram showing a sixth embodiment of the present invention.

FIG. 7 is a block diagram showing a seventh embodiment of the present invention.

FIG. 8 is a block diagram showing an eighth embodiment of the present invention.

FIG. 9 is a block diagram showing a ninth embodiment of the present invention.

FIG. 10 is a block diagram showing a tenth embodiment of the present invention.

FIG. 11 is a block diagram showing an eleventh embodiment of the present invention.

[Explanation of symbols]

10, 20, 30, 40, 50, 60, 70, 80 ... C
PU board 11,21,31,41,51,61,7
1, 81, 91 ... CPU chip, 12, 22, 32, 4
2, 52, 62, 72, 82, 92 ... Temperature sensor (S), 13, 23, 33, 43 ... Clock generator (CLK-GEN), 14, 24, 34, 44 ... Clock supply circuit, 53, 63 , 73, 83 ... Fans, 54,
64, 74, 84 ... Fan drive control circuit (DRV), 9
3 ... Interrupt generation unit (IRG), 94 ... Main memory (ME
M), 95 ... Suspend / resume processing unit (S /
R), 96 ... Storage memory, Tc ... Clock input terminal,
F ... Fin, H ... Heat conductor.

Claims (10)

[Claims] 1. In an electronic device having a built-in CPU board, a circuit for supplying a clock to a CPU chip, and a CPU
An electronic device comprising: a temperature sensor directly attached to a chip; and a circuit for controlling the frequency of the clock based on a detection signal of the temperature sensor. 2. An electronic device incorporating a CPU board, a circuit for supplying a clock to a CPU chip, and a CPU
An electronic device comprising: a temperature sensor provided on a CPU chip mounting portion of a board; and a circuit for controlling the frequency of the clock based on a detection signal of the temperature sensor. 3. An electronic device incorporating a CPU board, a circuit for supplying a clock to a CPU chip, and a CPU
A CPU board comprising a fin for removing heat from a chip, a temperature sensor provided on the fin, and a circuit for controlling the frequency of the clock based on a detection signal of the temperature sensor. Equipped electronic equipment. 4. An electronic device having a CPU board built-in, a circuit for supplying a clock to a CPU chip, and a CPU
The heat conductor for transmitting the heat of the chip, the temperature sensor for detecting the temperature of the CPU chip through the heat conductor, and the circuit for controlling the frequency of the clock based on the detection signal of the temperature sensor are provided. An electronic device equipped with a CPU board. 5. In an electronic device having a built-in CPU board, a fan for air-cooling a CPU chip, a temperature sensor directly attached to the CPU chip, and drive control of the fan based on a detection signal of the temperature sensor. And an electronic device including a CPU board. 6. In an electronic device having a built-in CPU board, a fan for air-cooling a CPU chip, a temperature sensor provided in a CPU chip mounting portion of the CPU board, and a detection signal of the temperature sensor are used for the above-mentioned operation. An electronic device having a CPU board, which is provided with a circuit for driving and controlling a fan. 7. In an electronic device having a built-in CPU board, a fin for removing heat from the CPU chip, a temperature sensor provided on the fin, a fan for cooling the CPU chip via the fin, and the temperature An electronic device comprising a CPU board, comprising: a circuit for driving and controlling the fan based on a detection signal of a sensor. 8. In an electronic device having a built-in CPU board, a heat conductor that transfers heat of the CPU chip, a temperature sensor that detects the temperature of the CPU chip via the heat conductor, and the heat conductor. A fan for cooling the CPU chip via a circuit and a circuit for driving and controlling the fan based on a detection signal from the temperature sensor.
An electronic device equipped with a PU board. 9. A portable computer having a suspend / resume function, comprising: a temperature sensor for detecting a temperature of a CPU chip; and a control means for executing a suspend process based on a detection signal of the temperature sensor. A portable computer characterized by being. 10. A function expansion unit for expanding the function of a portable computer, a sensor for detecting a built-in chip temperature of the portable computer mounted in the unit, a fan for blowing cooling air to the mounted portable computer, and A function expansion device for a portable computer, comprising an air outlet and a control means for driving and controlling the fan based on a detection signal from the temperature sensor.