WO2010137102A1 - 電子機器および冷却ファン制御方法 - Google Patents
電子機器および冷却ファン制御方法 Download PDFInfo
- Publication number
- WO2010137102A1 WO2010137102A1 PCT/JP2009/059519 JP2009059519W WO2010137102A1 WO 2010137102 A1 WO2010137102 A1 WO 2010137102A1 JP 2009059519 W JP2009059519 W JP 2009059519W WO 2010137102 A1 WO2010137102 A1 WO 2010137102A1
- Authority
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- WIPO (PCT)
- Prior art keywords
- target
- temperature
- rotational speed
- cooling
- cooling fan
- Prior art date
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Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/16—Cooling; Preventing overheating
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/16—Constructional details or arrangements
- G06F1/20—Cooling means
- G06F1/206—Cooling means comprising thermal management
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/20009—Modifications to facilitate cooling, ventilating, or heating using a gaseous coolant in electronic enclosures
- H05K7/20209—Thermal management, e.g. fan control
Definitions
- the present invention relates to an electronic device and a cooling fan control method.
- Patent Document 1 describes a control device that controls the number of revolutions per unit time (hereinafter simply referred to as “number of revolutions”) of a cooling fan provided in an electronic device.
- This control device when measuring the temperature of the electronic device, specifies the target voltage based on the measured temperature, changes the voltage supplied to the cooling fan (hereinafter referred to as “supply voltage”) to the target voltage, Adjust the cooling fan speed.
- control device when the supply voltage is changed to the target voltage, the control device immediately remeasures the temperature of the electronic device, specifies a new target voltage based on the remeasured temperature, and sets the supply voltage to the new target voltage. Change to
- the control device described in Patent Document 1 After changing the supply voltage to the target voltage, the control device described in Patent Document 1 immediately remeasures the temperature of the electronic device, identifies a new target voltage based on the remeasured temperature, and sets the supply voltage. Change to a new target voltage. For this reason, for example, in a situation where the temperature of the electronic device is changing, the update interval of the supply voltage is shortened.
- the cooling fan speed may change constantly.
- beat sound a sound that is annoying to the user
- control device described in Patent Document 1 has a problem that, for example, in a situation where the temperature of the electronic device is changing, the update interval of the supply voltage is shortened, so that a roaring sound tends to occur continuously. .
- An object of the present invention is to provide an electronic device and a cooling fan control method that can solve the above-described problems.
- An electronic apparatus includes a cooling target part, a cooling fan for cooling the cooling target part, temperature detection means for detecting the temperature of the cooling target part, and a cooling target detected by the temperature detection means
- the drive voltage supplied to the cooling fan is determined based on the temperature of the section, the drive voltage is supplied to the cooling fan, and the drive voltage update waiting time elapses after the drive voltage is supplied.
- Control means for re-determining the drive voltage based on the temperature of the cooling target portion detected by the temperature detection means at that time and supplying the drive voltage to the cooling fan.
- the cooling fan control method of the present invention is a cooling fan control method in an electronic device, which detects a temperature of a cooling target part and determines a driving voltage to be supplied to the cooling fan based on the temperature of the cooling target part.
- the drive voltage is supplied to the cooling fan and the drive voltage update wait time has elapsed since the drive voltage was supplied, the drive voltage is determined based on the temperature of the cooling target portion detected at that time. Is determined again, and the driving voltage is supplied to the cooling fan.
- FIG. 1 is a block diagram showing an electronic apparatus 1 according to an embodiment of the present invention.
- the electronic device 1 includes a cooling target unit 2, a cooling fan 3, a temperature detection unit 4, and a control unit 5.
- Control unit 5 includes a detection unit 6, a memory unit 7, an arithmetic processing unit 8, and a rotation speed control unit 9.
- the electronic device 1 is, for example, a projector or a personal computer.
- the electronic device 1 is not limited to a projector or a personal computer, and can be changed as appropriate.
- the cooling target part 2 is a heat generating device and is cooled by the cooling fan 3.
- the electronic device 1 is a projector, for example, a projection lamp is used as the cooling target unit 2.
- a CPU Central Processing Unit
- the cooling target unit 2 is not limited to the projection lamp or the CPU but can be changed as appropriate.
- the cooling fan 3 is used for cooling the cooling target part 2.
- the number of rotations of the cooling fan 3 (the number of rotations per unit time) varies depending on the magnitude of the supplied drive voltage.
- the cooling fan 3 has a higher rotational speed as the supplied drive voltage is higher.
- the temperature detection unit 4 can generally be called temperature detection means.
- the temperature detection unit 4 detects the temperature of the cooling target unit 2.
- the temperature detection unit 4 may directly detect the temperature of the cooling target unit 2 or may detect the temperature around the cooling target unit 2 and indirectly detect the temperature of the cooling target unit 2 from the surrounding temperature. May be.
- the temperature detection unit 4 outputs temperature information indicating the temperature of the cooling target unit 2 to the control unit 5 (specifically, the arithmetic processing unit 8).
- Control unit 5 can generally be referred to as control means.
- the control unit 5 determines a driving voltage to be supplied to the cooling fan 3 based on the temperature of the cooling target unit 2 detected by the temperature detecting unit 4 and supplies the driving voltage to the cooling fan 3. For example, the control unit 5 increases the drive voltage as the temperature of the cooling target unit 2 increases.
- control unit 5 determines the target rotational speed of the cooling fan 3 based on the temperature of the cooling target unit 2, and determines the drive voltage based on the target rotational speed. For example, the control unit 5 increases the target rotational speed as the temperature of the cooling target unit 2 increases. For example, the control unit 5 increases the drive voltage as the target rotational speed increases.
- waiting time When a waiting time for driving voltage update (hereinafter simply referred to as “waiting time”) elapses after the driving voltage is supplied to the cooling fan 3, the control unit 5 is detected by the temperature detecting unit 4 at that time. The drive voltage is determined again based on the temperature of the cooling target unit 2, and the determined drive voltage is supplied to the cooling fan 3.
- the waiting time may be determined by the control unit 5 based on the temperature of the cooling target unit 2 or may be a constant value, for example.
- the control unit 5 determines the target rotational speed of the cooling fan 3 based on the temperature of the cooling target unit 2, and determines the waiting time based on the target rotational speed. For example, the control unit 5 increases the waiting time determined based on the target rotational speed as the target rotational speed is a rotational speed at which a beat sound is likely to be generated by changing the rotational speed to the target rotational speed.
- Detecting unit 6 detects the rotational speed of the cooling fan 3.
- the detection unit 6 outputs rotational speed information indicating the rotational speed of the cooling fan 3 to the arithmetic processing unit 8.
- the memory unit 7 stores a temperature-rotation number table (hereinafter simply referred to as “table”) 7a and a rotation speed-update waiting time table (hereinafter simply referred to as “table”) 7b.
- table temperature-rotation number table
- table rotation speed-update waiting time table
- FIG. 2 is a diagram showing an example of the contents indicated by the information registered in the table 7a.
- waiting time information indicating the waiting time associated with the target rotational speed is registered.
- the waiting time associated with the target rotational speed at which a roaring sound is likely to occur due to the change of the rotational speed to the target rotational speed is made longer.
- the rotational speed region in which the cooling fan 3 can operate is divided into a first rotational speed region and a second rotational speed region.
- the beat sound is generated more than when the rotation speed of the cooling fan 3 is changed to the target rotation speed in the second rotation speed area. Is likely to occur.
- the rotation speed of the cooling fan 3 when the rotation speed of the cooling fan 3 is changed to the target rotation speed in the first rotation speed area, the rotation speed of the cooling fan 3 is changed to the target rotation speed in the second rotation speed area.
- the beat sound generated by the change in the rotation speed of the cooling fan 3 is easily recognized by a person.
- the waiting time associated with the target rotation speed in the first rotation speed area is set longer than the waiting time associated with the target rotation speed in the second rotation speed area.
- the rotation speed region in which the cooling fan 3 can operate is divided into the first rotation speed region and the second rotation speed region.
- the rotation speed region in which the cooling fan 3 can operate is divided. It may be divided into three or more regions. In this case, it is desirable that the waiting time associated with each region is appropriately set according to a level at which a roaring sound is easily recognized by changing the rotation number to the target rotation number in each region.
- FIG. 3 is a diagram showing an example of the contents indicated by the information registered in the table 7b.
- a region having a rotational speed not lower than the rotational speed R1 and not higher than the rotational speed R2 is used as the first rotational speed region.
- the region of the rotational speed less than the rotational speed R1 and the region of the rotational speed higher than the rotational speed R2 are used as the second rotational speed region.
- R1 and R2 are preferably set as appropriate according to the characteristics of the cooling fan 3 (for example, the shape of the cooling fan 3).
- the waiting time information indicating the waiting time associated with the rotation speed in the first rotation speed area indicates time T4.
- the waiting time information indicating the waiting time associated with the rotation speed in the second rotation speed area indicates the time T2. Note that T2 ⁇ T4. Further, it is desirable that T2 and T4 are appropriately set according to the characteristics of the cooling fan 3 (for example, the shape and weight of the cooling fan 3).
- the arithmetic processing unit 8 includes a timer and controls the cooling fan 3.
- the calculation processing unit 8 reads out the target rotation speed information corresponding to the temperature indicated by the temperature information from the memory unit 7 (table 7a).
- the arithmetic processing unit 8 controls the target rotational speed information. To the unit 9.
- the rotational speed control unit 9 When the rotational speed control unit 9 receives the target rotational speed information from the arithmetic processing unit 8, the rotational speed control unit 9 generates a drive voltage based on the target rotational speed information. For example, the rotational speed control unit 9 increases the drive voltage as the target rotational speed indicated by the target rotational speed information is higher.
- the rotation speed control unit 9 holds drive voltage information indicating the drive voltage corresponding to the target rotation speed for each target rotation speed, and reads the drive voltage information corresponding to the target rotation speed indicated by the target rotation speed information. The drive voltage indicated by the drive voltage information is generated.
- the rotational speed control unit 9 holds an arithmetic expression for calculating the drive voltage using the target rotational speed, and the drive voltage is calculated using the target rotational speed indicated by the target rotational speed information and the arithmetic expression. And the calculated drive voltage may be generated.
- Rotational speed control unit 9 when generating a driving voltage, supplies the driving voltage to cooling fan 3 to adjust the rotational speed of cooling fan 3.
- the rotation speed control unit 9 supplies the drive voltage to the cooling fan 3
- the rotation number control unit 9 outputs supplied information indicating supply to the arithmetic processing unit 8.
- the arithmetic processing unit 8 When the arithmetic processing unit 8 receives the supplied information from the rotation speed control unit 9, it performs the following control operation.
- the arithmetic processing unit 8 reads the waiting time information corresponding to the target rotation number indicated by the target rotation number information from the memory unit 7, and then the waiting time information read from the memory unit 7 is Wait until the waiting time elapses.
- the temperature information is received again from the temperature detection unit 4 and the rotation speed information is received again from the detection unit 5, and is indicated by the temperature information from the temperature detection unit 4.
- the target rotational speed information corresponding to the detected temperature is read from the memory unit 7 and the target rotational speed indicated by the target rotational speed information is different from the actual rotational speed of the cooling fan 3 indicated by the rotational speed information, the target rotational speed information is displayed.
- the rotational speed information is output to the rotational speed control unit 9.
- the arithmetic processing unit 8 performs a control operation every time it receives supplied information from the rotation speed control unit 9.
- the arithmetic processing unit 8 uses the timer in the arithmetic processing unit 8 to determine whether or not the waiting time has elapsed.
- the arithmetic processing unit 8 performs the control operation every time the target rotation number information is output to the rotation number control unit 9 instead of performing the control operation every time the supplied information is received from the rotation number control unit 9. Also good.
- FIG. 4 is a flowchart for explaining the operation of the electronic device 1.
- step S1 the arithmetic processing unit 8 receives temperature information indicating the temperature (Tc) of the cooling target unit 2 from the temperature detection unit 4 in order to calculate the target rotational speed. Arithmetic processing unit 8, when receiving the temperature information, executes step S2.
- step S2 the arithmetic processing unit 8 acquires target rotational speed information indicating the target rotational speed (Rt) corresponding to the temperature (Tc) indicated by the temperature information from the memory unit 7 (see FIG. 2). Arithmetic processing part 8 will perform Step S3, if target number-of-rotations information is received.
- step S ⁇ b> 3 the arithmetic processing unit 8 receives the rotation speed information indicating the current rotation speed (Rc) of the cooling fan 3 from the detection unit 6.
- the arithmetic processing unit 8 executes Step S4.
- step S4 the arithmetic processing unit 8 compares the target rotational speed (Rt) indicated by the target rotational speed information with the actual rotational speed (Rc) indicated by the rotational speed information. If the target rotational speed (Rt) is equal to the actual rotational speed (Rc), the arithmetic processing unit 8 returns the process to step S1. On the other hand, when the target rotational speed (Rt) is not equal to the actual rotational speed (Rc), the arithmetic processing unit 8 executes Step S5.
- step S5 the arithmetic processing unit 8 outputs the target rotational speed information to the rotational speed control unit 9.
- the rotational speed control unit 9 receives the target rotational speed information, it generates a drive voltage based on the target rotational speed information.
- the rotation speed control unit 9 supplies the drive voltage to the cooling fan 3 to adjust the rotation speed of the cooling fan 3.
- the rotation number control unit 9 outputs supplied information to the arithmetic processing unit 8.
- the arithmetic processing unit 8 executes Step S6.
- step S6 the arithmetic processing unit 8 reads the waiting time information indicating the waiting time (Tx) corresponding to the target rotation number (Rt) indicated by the target rotation number information from the memory unit 7 (see FIG. 3).
- the waiting time (Tx) is time T2
- Rc is R1 or more and R2 or less
- the waiting time (Tx) is time T4. It becomes.
- the arithmetic processing unit 8 executes Step S7.
- step S7 the arithmetic processing unit 8 waits until the waiting time (Tx) indicated by the waiting time information elapses. When the waiting time (Tx) has elapsed, the arithmetic processing unit 8 returns the processing to step S1.
- the control unit 5 supplies the cooling voltage to the cooling fan 3, and when the drive voltage update waiting time has elapsed, the cooling target unit 2 detected by the temperature detection unit 4 at that time.
- the drive voltage is determined again based on the temperature, and the determined drive voltage is supplied to the cooling fan 3.
- the drive voltage is determined again based on the temperature of the cooling target unit 2 detected by the temperature detection unit 4, and the determined drive voltage is used as the cooling fan.
- the time interval for updating the voltage supplied to the cooling fan 3 can be increased.
- control part 5 determines the waiting time for drive voltage update based on the temperature of the cooling object part 2 detected by the temperature detection part 4. Since the drive voltage is also determined based on the temperature of the cooling target unit 2, the drive voltage update waiting time can be made variable according to the temperature of the cooling target unit 2, that is, the drive voltage.
- control unit 5 determines the target rotational speed of the cooling fan 3 based on the temperature of the cooling target unit 2 and determines the waiting time for driving voltage update based on the target rotational speed
- the control unit 5 determines the longer the target rotational speed is such that a beat sound is likely to be generated by changing the rotational speed to the target rotational speed, the longer the waiting time for driving voltage update determined based on the target rotational speed is. It is desirable.
- the rotation speed of the cooling fan 3 can be quickly changed under a situation where the frequency of occurrence of the roaring sound is low and the probability that the roaring sound is generated is low. For this reason, it becomes possible to perform the suppression of the temperature rise of the electronic device 1 and the suppression of the generation of the beat sound with a good balance.
- a waiting time indicating the time until the next supply voltage to the cooling fan 3 is set is provided, and the waiting time is set according to the level at which the beat sound is easily recognized for each target rotation speed region. Is set.
- the change speed of the fan rotation speed can be made more gradual with respect to the rotation speed region in which the beat sound is more easily recognized, and the humming sound that is unpleasant to hearing can be reduced.
- the control unit 5 uses the table 7 a in the memory unit 7 to determine the target rotational speed of the cooling fan 2 based on the temperature of the cooling target unit 2 detected by the temperature detection unit 4. Although determined, the control unit 5 holds an arithmetic expression for calculating the target rotational speed using the temperature of the cooling target unit 2, and the temperature of the cooling target unit 2 detected by the temperature detection unit 4 and its calculation The target rotational speed may be determined using an equation.
- control part 5 determines the waiting time based on the target rotation speed using the table 7b in the memory part 7, the control part 5 uses the target rotation speed to set the waiting time.
- An arithmetic expression for calculation may be held, and the waiting time may be determined using the target rotational speed and the arithmetic expression.
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Human Computer Interaction (AREA)
- General Engineering & Computer Science (AREA)
- Thermal Sciences (AREA)
- Cooling Or The Like Of Electrical Apparatus (AREA)
- Control Of Electric Motors In General (AREA)
- Cooling Or The Like Of Semiconductors Or Solid State Devices (AREA)
Abstract
Description
2 冷却対象部
3 冷却ファン
4 温度検知部
5 制御部
6 検出部
7 メモリ部
8 演算処理部
9 回転数制御部
Claims (6)
- 冷却対象部と、
前記冷却対象部を冷却するための冷却ファンと、
前記冷却対象部の温度を検知する温度検知手段と、
前記温度検知手段にて検知された冷却対象部の温度に基づいて、前記冷却ファンに供給する駆動電圧を決定して、前記冷却ファンに前記駆動電圧を供給し、前記駆動電圧を供給してから駆動電圧更新用の待ち時間が経過すると、その時点で前記温度検知手段にて検知された冷却対象部の温度に基づいて、前記駆動電圧を再度決定して、前記冷却ファンに当該駆動電圧を供給する制御手段と、を含む電子機器。 - 前記制御手段は、さらに、前記駆動電圧更新用の待ち時間を、前記温度検知手段にて検知された冷却対象部の温度に基づいて決定する、請求項1に記載の電子機器。
- 前記制御手段は、前記冷却ファンの目標回転数を、前記温度検知手段にて検知された冷却対象部の温度に基づいて決定し、前記駆動電圧更新用の待ち時間を、前記目標回転数に基づいて決定し、前記目標回転数が、当該目標回転数への回転数の変更によってうなり音が発生しやすい回転数であるほど、当該目標回転数に基づいて決定する駆動電圧更新用の待ち時間を長くする、請求項2に記載の電子機器。
- 電子機器での冷却ファン制御方法であって、
冷却対象部の温度を検知し、
前記冷却対象部の温度に基づいて、冷却ファンに供給する駆動電圧を決定して、前記冷却ファンに前記駆動電圧を供給し、前記駆動電圧を供給してから駆動電圧更新用の待ち時間が経過すると、その時点で検知された冷却対象部の温度に基づいて、前記駆動電圧を再度決定して、前記冷却ファンに当該駆動電圧を供給する、冷却ファン制御方法。 - さらに、前記駆動電圧更新用の待ち時間を、前記冷却対象部の温度に基づいて決定する、請求項4に記載の冷却ファン制御方法。
- 前記冷却ファンの目標回転数を、前記冷却対象部の温度に基づいて決定し、前記駆動電圧更新用の待ち時間を、前記目標回転数に基づいて決定し、前記目標回転数が、当該目標回転数への回転数の変更によってうなり音が発生しやすい回転数であるほど、当該目標回転数に基づいて決定する駆動電圧更新用の待ち時間を長くする、請求項5に記載の冷却ファン制御方法。
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
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JP2011515765A JP5219007B2 (ja) | 2009-05-25 | 2009-05-25 | 電子機器および冷却ファン制御方法 |
PCT/JP2009/059519 WO2010137102A1 (ja) | 2009-05-25 | 2009-05-25 | 電子機器および冷却ファン制御方法 |
CN200980159467.8A CN102450113B (zh) | 2009-05-25 | 2009-05-25 | 电子设备及冷却扇控制方法 |
EP09845169.3A EP2437583A4 (en) | 2009-05-25 | 2009-05-25 | ELECTRONIC ARRANGEMENT AND COOLING FAN CONTROL METHOD |
US13/138,932 US20120107139A1 (en) | 2009-05-25 | 2009-05-25 | Electronic device and cooling fan control method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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PCT/JP2009/059519 WO2010137102A1 (ja) | 2009-05-25 | 2009-05-25 | 電子機器および冷却ファン制御方法 |
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WO2010137102A1 true WO2010137102A1 (ja) | 2010-12-02 |
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US (1) | US20120107139A1 (ja) |
EP (1) | EP2437583A4 (ja) |
JP (1) | JP5219007B2 (ja) |
CN (1) | CN102450113B (ja) |
WO (1) | WO2010137102A1 (ja) |
Cited By (1)
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CN104154022B (zh) * | 2014-08-15 | 2016-09-07 | 广东易事特电源股份有限公司 | 逆变器内的风扇调速方法 |
CN105792606B (zh) * | 2016-03-31 | 2017-12-26 | 海信集团有限公司 | 风扇转速控制方法、装置及投影系统的散热方法 |
CN108105119B (zh) * | 2017-12-18 | 2019-11-08 | 青岛海信激光显示股份有限公司 | 一种目标风扇启动方法 |
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2009
- 2009-05-25 JP JP2011515765A patent/JP5219007B2/ja not_active Expired - Fee Related
- 2009-05-25 EP EP09845169.3A patent/EP2437583A4/en not_active Withdrawn
- 2009-05-25 CN CN200980159467.8A patent/CN102450113B/zh not_active Expired - Fee Related
- 2009-05-25 US US13/138,932 patent/US20120107139A1/en not_active Abandoned
- 2009-05-25 WO PCT/JP2009/059519 patent/WO2010137102A1/ja active Application Filing
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JPH11251776A (ja) * | 1998-02-27 | 1999-09-17 | Nec Eng Ltd | 空冷装置の風量制御方式 |
JPH11272365A (ja) * | 1998-03-25 | 1999-10-08 | Toshiba Corp | 冷却ファンの速度制御方式、及び電子機器 |
JP2002268775A (ja) * | 2001-03-06 | 2002-09-20 | Internatl Business Mach Corp <Ibm> | 冷却ファンの制御方法および装置 |
JP2008227127A (ja) * | 2007-03-13 | 2008-09-25 | Seiko Epson Corp | 冷却ファン駆動制御システム、プロジェクタ、プログラム、情報記憶媒体及び冷却ファン駆動制御方法 |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
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CN103379804A (zh) * | 2012-04-25 | 2013-10-30 | 建准电机工业股份有限公司 | 用于可携式通信装置的散热系统 |
CN103379804B (zh) * | 2012-04-25 | 2016-08-10 | 建准电机工业股份有限公司 | 用于可携式通信装置的散热系统 |
Also Published As
Publication number | Publication date |
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CN102450113A (zh) | 2012-05-09 |
EP2437583A4 (en) | 2016-10-12 |
JP5219007B2 (ja) | 2013-06-26 |
EP2437583A1 (en) | 2012-04-04 |
JPWO2010137102A1 (ja) | 2012-11-12 |
CN102450113B (zh) | 2015-02-18 |
US20120107139A1 (en) | 2012-05-03 |
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