JP2008251738A - Electric device, and temperature control method thereof - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To achieve a reduction or the like in power consumption of a data driver or the like. <P>SOLUTION: A three-axis acceleration sensor 14 measures acceleration in three axial directions of a planar display device 10 while a temperature inside a casing is measured by a temperature sensor 12. An MPU 16 calculates each inclination in two directions perpendicular to a vertical direction of the device 10 so as to determine an installation direction. A temperature difference between the presence of rotation and the absence of rotation of a fan 24 is obtained for each installation direction so as to determine which is larger or smaller between the temperature difference and a threshold. Rotation control of the fan 24, luminance control of a display part 26, and sound-volume control of a speaker are executed corresponding to the determination result. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an electric device and a temperature control method thereof, and more particularly, is effective in properly controlling temperature even if the device is installed at an inclination of at least two directions or a right angle with respect to a vertical direction or a predetermined direction. The present invention relates to an electric device and a temperature control method thereof.

In order to maintain the normal operation of an electronic device, an electronic device equipped with a heat exhausting device in the casing of the electronic device has been conventionally known. Examples thereof are described in Patent Document 1 and Patent Document 2.
Patent Document 1 describes a display device equipped with an exhaust heat device, specifically a relatively large plasma display device. In this plasma display device, an angle detector is disposed in the casing. The upper and side fans are controlled based on the installation angle of the display device output from the angle detector to change the direction and strength of the natural convection of the air in the display device. It has been shown that exhaust heat can be achieved.
It is described that the angle detector is a two-dimensional angle detection.

Patent Document 2 describes a thermal protection device for a projector. This thermal protection device is provided with an inclination sensor and a temperature sensor, and determines the installation state of the projector device from the output of the inclination sensor, and also determines the temperature state in the projector housing from the output of the temperature sensor to obtain the temperature state. It is shown that the control according to the installation state is added to the control of the corresponding fan control unit and power supply unit, thereby achieving the thermal protection processing and the improvement of the reliability of the projector device.
JP 2000-132112 A JP 2001-21999 A

The plasma display device of Patent Document 1 is a two-dimensional installation angle such as normal installation within the display surface when the device is installed, installation rotated 90 degrees, or installation upside down with an angle detector. Detects and controls the temperature inside the device housing according to the installation angle, but even if the tilt in the display screen of the plasma display device is the same, there is a tilt in the front-back direction of the display screen The convection direction with respect to the gravity of the apparatus changes between the case where it is not and the temperature distribution in the apparatus case is different.
Since this state cannot be detected, even if there is a tilt in the front-rear direction, only temperature control based on the tilt in the display screen can be performed, and optimal temperature control can be performed depending on the cooling structure of the device. The normal operation of the device cannot be continued.

The projector thermal protection device described in Patent Document 2 also uses a tilt sensor, but this tilt sensor also has a detection function equivalent to that of the angle detector described in Patent Document 1, so that the patent The technical problem similar to the document 1 remains unsolved.
In addition, the temperature control takes into account the temperature state of the projector obtained from the temperature sensor, but that temperature is the temperature after the actual operation of the projector, and the projector is operated on a trial basis before entering the actual operation. No consideration has been given to the consideration of the temperature state when it is allowed to occur.

  The present invention has been made in view of the above-described circumstances, and performs temperature control properly even if the apparatus is installed with inclination in at least two directions or at right angles to a predetermined direction or at least two directions with respect to a predetermined direction. It is an object of the present invention to provide an electric device capable of performing the above and a temperature control method thereof.

  In order to solve the above-mentioned problem, the invention according to claim 1 relates to an electric device equipped with a heat exhaust device in a housing, and is provided in at least two directions with respect to a predetermined direction of the electric device when the electric device is installed. Inclination data output means for outputting inclination data and control means for performing exhaust heat control of the heat exhausting device based on the inclination data in at least two directions output from the inclination data output means.

  According to a second aspect of the present invention, the heat generating part and the heat exhausting device are provided in the housing of the electric device, and the heat generating control means for controlling the increase and decrease of the heat generating capacity of the heat generating unit and the increase and decrease of the heat exhausting capacity of the heat exhausting device. In accordance with an electrical apparatus equipped with an exhaust heat control means for controlling the temperature, a temperature measuring means for measuring the temperature in the casing, and the heat generation control means are controlled to set the heat generation capacity of the heat generating portion to a first heat generation level. And the first heat value measured by the temperature measuring means when the exhaust heat control means is controlled to set the exhaust heat capacity of the exhaust heat device to the first exhaust heat level, and the heat generation The control means is controlled to set the heat generation capacity of the heat generating portion to the second heat generation level, and the exhaust heat control means is controlled to set the exhaust heat capacity of the exhaust heat device to the second exhaust heat level. A predetermined relationship with the second temperature value measured by the temperature measuring means. It is characterized in that a control means for performing exhaust heat control of the exhaust heat device based on and.

According to a third aspect of the present invention, there is provided inclination data output means for outputting inclination data in at least two directions with respect to a predetermined direction of the electric device when the electric device is installed, and the control means includes the inclination data output means. The at least two-direction inclination data output from the control unit and the heat generation control means to set the heat generation capacity of the heat generation unit to the first heat generation level, and the exhaust heat control means to control the exhaust heat The first temperature value measured by the temperature measuring means when the exhaust heat capacity of the heat device is set to the first exhaust heat level and the heat generation control means are controlled to control the heat generation capacity of the heat generating part to the second. A second temperature measured by the temperature measuring means when the exhaust heat control means is controlled to set the exhaust heat capacity of the exhaust heat device to the second exhaust heat level. Based on a predetermined relationship with the value It is characterized by being configured to perform exhaust heat control of the exhaust heat device.
In claim 2 and claim 3, the first heat generation level and the first exhaust heat level include a case where the heat generating unit is not operated and a case where the heat exhaust device is not driven, respectively.

  A fourth aspect of the present invention relates to the electric device according to the second or third aspect, wherein the predetermined relationship includes a difference between the first temperature value and the second temperature value and a preset threshold. It is characterized by a magnitude relationship with the value.

  A fifth aspect of the present invention relates to the electric device according to the second, third, or fourth aspect, wherein the first and second heat generation levels are maximum heat generation levels of the electric device, and the first exhaust heat level. Is a zero level of exhaust heat capacity of the exhaust heat device, and the second exhaust heat level is a maximum exhaust heat level of the exhaust heat capacity.

  A sixth aspect of the present invention relates to the electric device according to any one of the first to fifth aspects, wherein the inclination data output means includes a triaxial acceleration sensor, the predetermined direction is a vertical direction, and The two directions are two directions perpendicular to the vertical direction.

  A seventh aspect of the present invention relates to the electrical apparatus according to any one of the first to sixth aspects, wherein the tilt data output means includes input means for inputting the tilt data in at least two directions, and the input means. And a storage means for storing the input inclination data, wherein the control means has a reading means for reading the inclination data from the storage means, and the heat exhaust device is based on the inclination data read by the reading means. It is characterized by being configured to perform exhaust heat control.

  The invention according to claim 8 relates to the electric device according to any one of claims 2 to 7, wherein the electric device is a display device, and the heat exhaust device is attached to a housing of the display device. An intake fan and an exhaust fan, wherein the temperature measurement means is a temperature sensor mounted in the housing, and the heat generation control means controls the luminance of the display unit and / or the sound output unit of the electric device. The exhaust heat control means is a fan control means for the intake fan and the exhaust fan.

  A ninth aspect of the invention relates to the electrical device according to any one of the first to eighth aspects, wherein the control means outputs an alarm from the alarm means when the inclination in the at least two directions is out of tolerance. It is characterized by letting.

  A tenth aspect of the present invention relates to the electric device according to the ninth aspect, wherein the alarm is an alarm display displayed on the display device.

  The invention according to claim 11 relates to a method of controlling the temperature in the casing of an electric device equipped with a heat exhaust device in the casing, and outputs tilt data in at least two directions with respect to a predetermined direction of the electric device, and outputs The exhaust heat control of the exhaust heat device is performed based on the at least two direction inclination data.

  The invention according to claim 12 relates to the temperature control method for an electric device according to claim 11, wherein the temperature in the casing is measured, and based on the output tilt data in the at least two directions and the measured temperature value. The exhaust heat control of the heat exhaust device is performed.

  A thirteenth aspect of the present invention relates to the temperature control method for an electric device according to the twelfth aspect, wherein the heat generation capability of the electric device is set to a first heat generation level, and the heat discharge capability of the heat exhaust device is A first temperature value measured when the exhaust heat level is set to 1 and the heat generation capacity of the electric device is set to a second heat generation level; The exhaust heat control of the exhaust heat device is performed based on a predetermined relationship with the second temperature value measured when the exhaust heat level is set.

  The invention described in claim 14 relates to the temperature control method for an electric device according to claim 12 or 13, wherein the predetermined relationship is a difference between the first temperature value and the second temperature value, and is set in advance. It is characterized by a magnitude relationship with the threshold value.

  A fifteenth aspect of the present invention relates to the temperature control method for an electric device according to the twelfth, thirteenth, or fourteenth aspect, wherein the first and second heat generation levels are maximum heat generation levels of the electric device. The exhaust heat level is zero level of the exhaust heat capability of the exhaust heat device, and the second exhaust heat level is the maximum exhaust heat level of the exhaust heat capability.

  A sixteenth aspect of the present invention relates to the temperature control method for an electric device according to any one of the eleventh to fifteenth aspects, wherein the inclination in the at least two directions is calculated based on output data of a triaxial acceleration sensor. It is characterized by that.

  The invention according to claim 17 relates to the temperature control method for an electric device according to any one of claims 11 to 16, wherein the at least two-direction tilt output is input with the at least two-direction tilt data, The input tilt data is stored in a storage means and output.

  An eighteenth aspect of the present invention relates to a temperature control method for an electric device according to any one of the eleventh to seventeenth aspects, wherein the electric device is a display device, and the heat exhausting device is a housing of the display device. The heat generation capacity of the electric device is set by controlling the brightness of the display device and / or the volume of the sound emitting device provided in the electric device, and the heat exhausting device. The exhaust heat capacity is set by controlling the rotational speeds of the intake fan and the exhaust fan.

  A nineteenth aspect of the present invention relates to the temperature control method for an electric device according to any one of the twelfth to eighteenth aspects, wherein an alarm is output when the inclination in the at least two directions is out of tolerance. It is said.

  A twentieth aspect of the present invention relates to the temperature control method for an electric device according to the nineteenth aspect, wherein the alarm is an alarm display displayed on the display device.

  According to a twenty-first aspect of the present invention, there is provided a control program for an electric device, which causes a computer to control the electric device according to any one of the first to tenth aspects.

  According to a twenty-second aspect of the present invention, there is provided a control program for a temperature control method for an electric device, which causes a computer to execute the temperature control method for an electric device according to any one of the eleventh to twentieth aspects.

  A twenty-third aspect of the invention relates to a recording medium on which a control program is recorded, wherein the control program according to the twenty-first or twenty-second aspect is recorded.

According to the present invention, when the electric device is installed, tilt data in at least two directions with respect to the predetermined direction is output, and exhaust heat control of the heat exhaust device in the electric device is performed based on the tilt in the at least two directions. Therefore, it is possible to provide a judgment as to whether or not use in the installed state is allowed regardless of whether or not the device is in an allowed installation orientation. Contributes to the improvement of reliability.
Further, when the electric device is a display device having a speaker and the heat exhaust device is constituted by a fan, when the inclination in two directions is within an allowable range, the temperature of the device is prevented from rising at those inclinations. In order to control the rotation of the fan and control the brightness of the display unit and the volume of the speaker, it is optimal to minimize the noise accompanying the increase in the number of rotations of the fan, the brightness of the display unit, and the volume of the speaker. Temperature control can be performed.

  This invention outputs inclination data in at least two directions with respect to a predetermined direction when the electric device is installed, and controls exhaust heat of the heat exhausting device in the electric device based on the inclination data in at least two directions. Configured to do. Further, the exhaust heat control is configured by further adding the temperature in the apparatus housing.

  1 is a diagram showing an electrical configuration of a flat display device according to Embodiment 1 of the present invention, FIG. 2 is a layout diagram of invention-related components of the flat display device in a housing, and FIG. 3 is a flat display. FIG. 4 is a diagram showing a part of the operation processing flow of the apparatus, FIG. 4 is a diagram showing the rest of the operation processing flow of the flat display apparatus, and FIG. 5 shows an angular relationship necessary for specifying the installation state of the flat display apparatus. 6 is a diagram showing the inclination of the X axis in the angular relationship shown in FIG. 5, FIG. 7 is a diagram showing the inclination of the Z axis in the angular relationship shown in FIG. 5, and FIG. 8 is a standard of the flat display device. FIG. 9 is a vertical installation view of the flat display device, FIG. 10 is an upside down installation view of the flat display device, and FIG. 11 is an upward installation view of the flat display device.

  A flat display device (display device) 10 according to this embodiment relates to a device having functions such as optimum temperature control even when installed in a state where there is an inclination in two directions perpendicular to the vertical direction of the device. , A gyro sensor (three-axis acceleration sensor) 14, an MPU (microprocessor unit) 16, a fan control unit 18, a test signal generation unit 20, and a luminance control unit 22. The fan control unit 18 is connected to the fan 24 of the flat display device 10, and the luminance control unit 22 is connected to the display unit 26 of the flat display device 10. The fan 24 shown in FIG. 1 represents a fan provided in the flat display device 10, and the flat display device 10 includes four intake fans 24-1, 24-4, 24-4, as shown in FIG. 24-6, 24-7 and four exhaust fans 24-2, 24-3, 24-5, 24-8 are provided, and rotation control is performed by the fan control unit 18. In FIG. 2, the upper side of the figure is the screen side, and the lower side of the figure is the back side.

The temperature sensor 12 is disposed in the flat display device 10 and is an element for measuring the temperature, and its output is connected to the MPU 16.
The gyro sensor 14 is an element that measures an acceleration value in the triaxial direction of the flat display device 10, and an output thereof is connected to the MPU 16.

The MPU 16 has a look-up table (not shown) 16T in which inclinations in three dimensions with respect to the acceleration values in the three axis directions are registered in advance, and a look-up table for each acceleration value sent from the gyro sensor 14. Fan control data, fan stop control data, and maximum rotation control data in which the inclination with respect to each acceleration value input with reference to 16T is estimated and the temperature value sent from the temperature sensor 12 is taken into consideration for this inclination Is sent to the fan control unit 18.
The fan control data is used to control the rotation according to the extent to which the difference described below is greater than or equal to the threshold value, that is, to slow down the fan speed when the difference greatly exceeds the threshold value. When the difference slightly exceeds the threshold value, it is data for performing control to increase the rotational speed of the fan. The threshold value is registered in advance in the MPU 16 for each installation direction to be described later. Further, the fan control data may be data in a format for uniformly controlling the fans shown in FIG.

FIG. 2 shows a case where the fans 24-3 and 24-4 are installed at the top of the flat display device 10. In this case, the fans 24-3 and 24-4 are arranged to promote natural convection. Fan control data for rotating 24-5, 24-1, 24-7 is registered in the lookup table 16T in advance.
Further, depending on the inclination and temperature, fan control data for rotating the fan 24-3 faster than the fan 24-5 and rotating the fan 24-7 faster than the fan 24-1 is registered in the lookup table 16T in advance. To do.
The fan control unit 18 is a control unit that gives the fan 24 rotation control of the fan corresponding to the fan control data supplied from the MPU 16.

  Further, the MPU 16 supplies display control data for displaying the entire screen in white to the test signal generator 20. The test signal generation unit 20 supplies a test signal to the display unit 26 according to the display control data to cause the display to display all white. Display control data is held in the MPU 16 in advance. Further, the MPU 16 supplies luminance control data corresponding to the above-described inclination and temperature value to the luminance control unit 22. The luminance control unit 22 displays the display unit 26 in a display state corresponding to the luminance control data. Similarly to the fan control data, the brightness control data is preset according to the above-described inclination and temperature value, and is registered in the lookup table 16T.

  Although not shown in FIG. 1, when a speaker is provided in the housing of the flat display device, the MPU 16 supplies volume control data to a volume controller not shown in FIG. This volume control data is also preset according to the above-described inclination and temperature value, and is registered in the lookup table 16T.

  These controls are performed by a program that executes the processing flow shown in FIG. 3 and FIG. 4. This program is stored in the storage unit in the MPU 16 and is read from the storage unit by the arithmetic processing unit in the MPU 16. The processing procedure shown in FIG. 3 is performed by being executed by the arithmetic processing unit. 3 and 4 are connected by connectors I, II, III, IV and V.

Next, the operation of this embodiment will be described with reference to FIGS.
For the convenience of description of this embodiment, the X-axis, Y-axis, and Z-axis of the flat display device 10 shown in FIGS. 1 and 2 are respectively set to the horizontal direction and vertical direction (vertical direction) of the screen 10S as shown in FIG. Or the direction of gravity) and the front-rear direction. In FIG. 5, the upper part 10 </ b> T of the flat display device 10 is above the paper surface, and the lower part 10 </ b> B is below the paper surface.
The inclination of the flat display device 10 from the X axis is represented by ∠X as shown in FIGS. 5 and 6, and ∠X is 90 ° −∠Φ, as is apparent from FIG. 6. Further, the inclination from the Z axis is represented by ∠Z as shown in FIGS. 5 and 7, and this 、 Z is 90 ° −∠θ, as is apparent from FIG.
In the installation of the flat display device 10, the allowable inclination is | ∠X | <5 °, and 0 ° ≦ ∠Z ≦ 30 °.

It is assumed that such a condition is given to the flat display device 10 in advance, and the flat display device 10 is installed in any of standard installation, vertical installation, upside down installation, or upward installation and enters into operation. Further, in the flat display device 10, threshold values C, F, I, and L for comparing with the later-described differences corresponding to standard installation, vertical installation, upside down installation, and upside installation in the memory of the MPU 16. Is registered.
When the operation is started, the acceleration sensor 14 measures the X-axis, Y-axis, and Z-axis accelerations. These acceleration values are sent to the MPU 16. Since the MPU 16 has a relationship in which the acceleration values of the X axis and the Y axis are sin (重力 X) and sin (∠Z) of the gravitational acceleration, the MPU 16 calculates the arc sine of each acceleration value to obtain the inclination ∠X and the inclination. ∠Z is calculated (S1 in FIG. 3).

Next, the MPU 16 determines whether or not ∠Z is in a range of 0 ° ≦ ∠Z ≦ 30 ° (S2 in FIG. 3). If this condition of 0 ° ≦ ∠Z ≦ 30 ° is satisfied, the process proceeds to the determination process for standard installation, vertical installation, and inverted installation, but if not, the process proceeds to determination process for upward installation.
If the determination in step S2 is affirmative (yes in step S2 in FIG. 3), it is determined from the value of the inclination ∠X whether the installation direction is standard installation, vertical installation, or inverted installation.

At the beginning of this determination, it is determined whether or not | ∠X | <5 ° is satisfied (step S3 in FIG. 3). If this determination is affirmative (yes in step S3 in FIG. 3), it is determined that the apparatus is in a standard installation (FIG. 8). If | ∠X | <5 ° is not satisfied (no in step S3 in FIG. 3), but 85 ° <| ∠X | <95 ° is satisfied (yes in step S3 in FIG. 3), the apparatus is in the vertical orientation. It determines with it being installation (FIG. 9). If 85 ° <| ∠X | <95 ° is not satisfied (no in step S4 in FIG. 3), and 175 ° <| ∠X | ≦ 180 ° is satisfied (yes in step S5 in FIG. 3), the apparatus Is determined to be installed upside down (FIG. 10).
Although 0 ° ≦ ∠Z ≦ 30 ° is not satisfied (no in step S2 in FIG. 3), | ∠X | <5 ° is satisfied (yes in step S6 in FIG. 3), and −95 ° <∠Z If <−85 ° is satisfied (Yes in step S7 in FIG. 3), it is determined that the apparatus is installed upward (FIG. 11).

  Even when 175 ° <| ∠X | ≦ 180 ° is not satisfied (no in step S5 in FIG. 3) or when | ∠X | <5 ° is not satisfied (no in step S6 in FIG. 3). In addition, even when −95 ° << Z <−85 ° is not satisfied (no in step S7 in FIG. 3), an alarm is displayed indicating that the installation state of the apparatus is in an installation direction not permitted by the apparatus. This is performed (step S8 in FIG. 4).

  When the determination is in any of the installation directions described above, the MPU 16 supplies the white signal (test signal) from the test signal generation unit 20 to the display unit 26 in a state where each fan of the apparatus is stopped. The image is displayed from the screen (steps S31, S41, S51, S71 in FIG. 3). The temperature value of the temperature sensor 12 after this image is stored in the memory of the MPU 16 (steps S32, S42, S52, S72 in FIG. 3). The temperature value in step S32 is A, the temperature value in S42 is D, the temperature value in S52 is G, and the temperature value in S72 is J.

  After this measurement, the MPU 16 rotates the fan 24 at full speed and supplies the white signal from the test signal generation unit 20 to the display unit 26 and outputs the image from the screen (steps S33, S43, S53, FIG. 3). S73). The temperature value of the temperature sensor 12 after the image output is held in the memory of the MPU 16 (steps S34, S44, S54, S74 in FIG. 3). The temperature value in step S34 is B, the temperature value in S44 is E, the temperature value in S54 is H, and the temperature value in S74 is K.

After these measurement processes, the MPU 16 calculates the difference between the temperature value when the fan is stopped and the temperature value when the fan is rotated, measured as described above, for each installation direction, and corresponds to each difference. The threshold values C, F, I and L stored in advance are compared (steps S35, S45, S55 and S75 in FIG. 4).
In this comparison, the difference is less than the corresponding threshold value, that is, in the case of standard installation, the difference AB is smaller than the threshold value C [(AB) <C] (no in step S35 in FIG. 4), In the case of vertical installation, the difference DE is smaller than the threshold value F [(DE) <F] (no in S45 in FIG. 3). Smaller [(G−H) <I] (no in S55), if upward installation, the difference JK is smaller than the threshold L [(JK) <L] (no in S75 in FIG. 4) Then, the MPU 16 has a poor air cooling effect by the fan, that is, the ventilation environment around the device tends to be closed (clogged) preventing the ventilation, the effect of forced ventilation is poor, the fan rotation control, the brightness of the display unit It is judged that the effectiveness of temperature control by control and speaker volume control is poor, Performed on the display section 26 an alarm indication that cold impossible (step S8 in FIG. 4).

If each difference is equal to or greater than the corresponding threshold value in the above-described allowable installation direction (yes in steps S35, S45, S55, and S75 in FIG. 4), the MPU 16 has a sufficient ventilation environment around the device. It is determined that the fan rotation control, the temperature control by the brightness control of the display unit, and the volume control of the speaker can be performed successfully, and the temperature control corresponding to each installation direction (steps S36, S46 in FIG. 4). S56 and S76) are performed as follows.
In this temperature control, the rotation speeds of the intake fan and the exhaust fan according to the determination result of the installation direction that is allowable and the determination result that the difference is equal to or greater than the corresponding threshold value are set. Optimal control is performed via the fan control unit 18, and optimal luminance control of the display unit 26 is performed via the luminance control unit 22 in accordance with the rotation speed control. In addition to this, the volume control of the speaker is performed via a volume control unit (not shown).

  Specifically, when the above-described difference is large enough to exceed the threshold value, control is performed so that the number of rotations of the fan is low and the decrease in luminance and volume is small, and the above-described difference exceeds the threshold value. When the degree is slight, control is performed to increase the rotation speed of the fan and increase the decrease in brightness and the decrease in volume, thereby suppressing the temperature increase in the apparatus housing.

  Thus, according to the configuration of this embodiment, it is possible to provide a determination as to whether or not use in the installed state is allowed regardless of whether or not the device is in an allowed installation orientation. This improves the reliability of the device. In addition, when the tilt in the two directions is within the allowable range, the rotation of the fan is controlled so as to prevent the temperature of the apparatus from rising at those tilts, and the brightness of the display unit and the volume of the speaker are controlled. It is possible to perform optimum temperature control while minimizing noise accompanying the increase in the number of rotations, lowering of the luminance of the display unit, and lowering of the volume of the speaker.

Although the embodiments of the present invention have been described in detail with reference to the drawings, the specific configuration of the present invention is not limited to these embodiments, and the design does not depart from the gist of the present invention. These changes are included in the present invention.
For example, in order to measure the inclination in two directions perpendicular to the vertical direction of the flat display device, in addition to the triaxial acceleration sensor, other measuring means capable of measuring the same inclination, for example, two inclination sensors are used. The present invention may be implemented.
Including this case, an inclination equivalent to the above with respect to a specific direction given to the apparatus may be used in the practice of the present invention.
In each of the above cases, the same inclinations are obtained by any acquisition means when the flat display device is installed, and the inclination data is registered and stored in the control means or a recording medium (such as a card). It is also possible to implement the present invention by using those inclination data for the processing in the above-described embodiment.

In order to obtain the above difference, the rotation of the fan, the display state of the display unit, and the volume of the speaker are set to corresponding amounts other than those described above, and the threshold value is also changed accordingly. Also good.
In the embodiments, air is assumed. However, the present invention can be implemented in other gases and fluids.

  The flat display device disclosed herein and the temperature control method thereof can be used in an electric device in which the inclination of the device is installed in various modes in front, rear, left, and right.

FIG. 1 is a diagram showing an electrical configuration of a flat display device according to Embodiment 1 of the present invention. It is an arrangement plan in a case of an invention related component of the flat display device. It is a figure which shows a part of operation | movement processing flow of the same flat display apparatus. It is a figure which shows the remainder of the operation processing flow of the same flat display apparatus. It is a figure which shows the angle relationship required for the installation state specification of the same flat display apparatus. FIG. 6 is a diagram showing the inclination of the X axis in the angular relationship shown in FIG. It is a figure which shows the inclination of the Z-axis in the angle relationship shown in FIG. It is a standard installation drawing of the flat display device. It is the vertical installation figure of the same flat display apparatus. Upside down installation drawing of the flat display device It is an upward installation figure of the same flat display device.

Explanation of symbols

12 Temperature sensor (temperature measurement means)
14 3-axis acceleration sensor (tilt data output means)
16 MPU (part of control means)
18 Fan control part (part of control means)
20 Test signal generator (part of control means)
22 Luminance control unit (remaining control means)
24 fan (heat exhaust device)
26 Display section

Claims (23)

An electrical device equipped with a heat exhaust device in a housing,
Inclination data output means for outputting inclination data in at least two directions with respect to a predetermined direction of the electric device when the electric device is installed;
An electrical apparatus comprising: control means for performing exhaust heat control of the heat exhaust apparatus based on the at least two directions of inclination data output from the inclination data output means. A heating unit and an exhaust heat device are provided in a casing of the electric device, and an exothermic control unit that controls increase and decrease of the exothermic capacity of the exothermic unit and an exhaust heat control unit that controls increase and decrease of the exhaust heat capacity of the exhaust heat device. An electrical device to be equipped,
Temperature measuring means for measuring the temperature in the housing;
The heat generation control means is controlled to set the heat generation capacity of the heat generating portion to the first heat generation level, and the heat exhaustion control means is controlled to control the heat dissipation capacity of the heat exhaust device. A first temperature value measured by the temperature measuring means when set to a heat level, and the heat generation control means to control the heat generation capacity of the heat generating portion to the second heat generation level; and Based on a predetermined relationship with the second temperature value measured by the temperature measuring means when the exhaust heat control means is controlled to set the exhaust heat capacity of the exhaust heat device to the second exhaust heat level. And a control means for performing exhaust heat control of the exhaust heat apparatus. Inclination data output means for outputting inclination data in at least two directions with respect to a predetermined direction of the electric device when the electric device is installed,
The control means includes
The inclination data in at least two directions output from the inclination data output means;
The heat generation control means is controlled to set the heat generation capacity of the heat generating portion to a first heat generation level, and the heat exhaustion control means is controlled to set the heat dissipation capacity of the heat exhaust device to the first heat exhaust level. The first temperature value measured by the temperature measuring means and the heat generation control means to set the heat generation capacity of the heat generating portion to the second heat generation level, and the exhaust heat control A predetermined relationship with the second temperature value measured by the temperature measuring means when the means is controlled to set the exhaust heat capacity of the exhaust heat device to the second exhaust heat level;
The electric apparatus according to claim 2, wherein the electric apparatus is configured to perform exhaust heat control of the exhaust heat apparatus based on the above.   4. The electricity according to claim 2, wherein the predetermined relationship is a magnitude relationship between a difference between the first temperature value and the second temperature value and a preset threshold value. apparatus.   The first and second heat generation levels are maximum heat generation levels of the electric device, the first exhaust heat level is a zero level of exhaust heat capability of the exhaust heat device, and the second exhaust heat level. The electric device according to claim 2, 3 or 4, wherein the level is a maximum exhaust heat level of the exhaust heat capacity.   6. The tilt data output means includes a triaxial acceleration sensor, wherein the predetermined direction is a vertical direction, and the two directions are two directions perpendicular to the vertical direction. The electrical apparatus as described in any one.   The inclination data output means includes input means for inputting inclination data in at least two directions and storage means for storing inclination data input from the input means. The control means receives inclination data from the storage means. 7. The apparatus according to claim 1, further comprising: a reading unit configured to read out heat from the heat exhausting device based on inclination data read out by the reading unit. An electrical device according to 1.   The electrical device is a display device, the heat exhaust device is an intake fan and an exhaust fan attached to a housing of the display device, and the temperature measuring means is a temperature sensor attached to the housing. The heat generation control means is means for controlling the luminance of the display unit and / or the volume of the sound emission part of the electric device, and the exhaust heat control means is fan control means of the intake fan and the exhaust fan. An electrical device according to any one of claims 2 to 7, characterized in that   9. The electric device according to claim 1, wherein when the inclination in the at least two directions is out of tolerance, the control unit outputs an alarm from the alarm unit.   The electric device according to claim 9, wherein the alarm is an alarm display displayed on the display device. A method of controlling the temperature in the housing of an electrical device equipped with a heat exhaust device in the housing,
Output tilt data in at least two directions with respect to a predetermined direction of the electrical device;
A method for controlling the temperature of an electric device, wherein the exhaust heat control of the exhaust heat device is performed based on the output inclination data in at least two directions.   The first temperature measured when the heat generation capacity of the heat generating portion of the electric device is set to the first heat generation level and the heat exhaust capability of the heat exhaust apparatus of the electric device is set to the first heat exhaust level. And a second temperature value measured when the heat generating capacity of the heat generating unit is set to a second heat generating level and the heat exhausting capacity of the heat exhausting device is set to a second heat exhaust level. A method for controlling the temperature of an electrical device, wherein exhaust heat control of the exhaust heat device is performed based on the predetermined relationship. Output tilt data in at least two directions with respect to a predetermined direction of the electrical device;
13. The temperature control method for an electric device according to claim 12, wherein the exhaust heat control of the exhaust heat device is performed based on the output inclination data in at least two directions and the predetermined relationship.   14. The electricity according to claim 12, wherein the predetermined relationship is a magnitude relationship between a difference between the first temperature value and the second temperature value and a preset threshold value. Device temperature control method.   The first and second heat generation levels are maximum heat generation levels of the electric device, the first exhaust heat level is a zero level of exhaust heat capability of the exhaust heat device, and the second exhaust heat level. 15. The temperature control method for an electric device according to claim 12, wherein the level is a maximum exhaust heat level of the exhaust heat capacity.   The temperature control method for an electric device according to any one of claims 11 to 15, wherein the inclination in the at least two directions is calculated based on output data of a triaxial acceleration sensor.   The tilt output in at least two directions is obtained by inputting the tilt data in at least two directions, storing the tilt data to be stored in a storage unit, and outputting the stored tilt data. The temperature control method of the electric apparatus of description.   The electrical device is a display device, the heat exhaust device is an intake fan and an exhaust fan attached to a housing of the display device, and the setting of the heat generation capacity of the heat generating unit is the brightness of the display device and / or The volume of a sound emitting device installed in the electric device is controlled, and the heat exhaust capability of the heat exhaust device is set by controlling the number of rotations of the intake fan and the exhaust fan. Item 18. The temperature control method for an electrical device according to any one of Items 11 to 17.   The temperature control method for an electric device according to any one of claims 12 to 18, wherein an alarm is output when the inclination in the at least two directions is out of tolerance.   The temperature control method for an electric device according to claim 19, wherein the alarm is an alarm display displayed on the display device.   A control program for causing a computer to control the electric device according to any one of claims 1 to 10.   A control program for causing a computer to execute the temperature control method for an electric device according to any one of claims 11 to 20.   A recording medium on which the control program according to claim 21 or 22 is recorded.

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