JP2006313188A - Electronic device, and its control method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce operating noise to be sensed by a user when cooling an optoelectroni device. <P>SOLUTION: In the vicinity of the optoelectroni device 31, a fan 36 of cooling the device 31 is arranged. A detection apparatus 10 generates a detected signal Sv at a level according to the volume around the optoelectroni device 31. For example, the detection apparatus 10 generates a detected signal Sv at a level according to the velocity V of a moving body in which an electronic device D is installed. A controller 20 controls the number of revolution of the fan 36 in accordance with the level of the detected signal Sv. For example, the controller 20 controls the fan 36 in such a manner that the number of revolution is made more as the velocity V is higher. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a technique for cooling an electro-optical device including an electro-optical element such as a liquid crystal element or an organic EL (ElectroLuminescence) element.

When this type of electro-optical element is used in a high-temperature environment, its characteristics deteriorate. In particular, the organic EL element is remarkably deteriorated by heating. In order to prevent such deterioration of characteristics, for example, Patent Document 1 and Patent Document 2 disclose a technique for cooling an electro-optical device by supplying cooling air from a fan.
Japanese Patent Laying-Open No. 2003-302619 (FIG. 4) Japanese Patent Laying-Open No. 2005-25111 (FIG. 1)

  By the way, it is desirable that the amount of cooling air supplied to the electro-optical device is large from the standpoint of improving the cooling efficiency. However, if the air volume of the cooling air is increased too much, there is a problem that the operating noise of the fan increases and this is perceived by the user as annoying noise. The present invention has been made in view of such circumstances, and an object thereof is to solve the problem of reducing the operating sound sensed by the user when the electro-optical device is cooled.

  In order to solve this problem, an electronic apparatus according to the present invention includes an electro-optical device including a plurality of electro-optical elements, a cooling mechanism (for example, the fan 36 shown in FIG. 1) for cooling the electro-optical device, Detection means for generating a detection signal having a level corresponding to the volume around the optical device, and control means for controlling the cooling capacity of the cooling mechanism in accordance with the level of the detection signal generated by the detection means.

  In the present invention, since the cooling capacity of the cooling mechanism is controlled according to the level of the detection signal corresponding to the volume around the electro-optical device, for example, the cooling capacity of the cooling mechanism increases as the volume around the electro-optical device increases. Can be raised. Here, the operating noise of the cooling mechanism increases as the cooling capacity increases. In other words, the operating noise of the cooling mechanism decreases as the cooling capacity decreases. Therefore, according to the present invention, it is possible to avoid a situation in which the operating sound of the cooling mechanism is perceived as annoying noise by the user by suppressing the operating sound of the cooling mechanism when the surrounding volume is low. On the other hand, when the surrounding sound volume is high, the electro-optical device can be sufficiently cooled by increasing the cooling capacity of the cooling mechanism, thereby suppressing the deterioration of the characteristics of the electro-optical element. Even if the cooling capacity is increased when the surrounding volume is high, the operating sound of the cooling mechanism that is actually perceived by the user is relatively suppressed as compared with the case where the surrounding volume is low. That is, according to the present invention, the electro-optical device can be sufficiently cooled without causing the user to perceive the operation sound of the cooling mechanism as annoying noise.

  The electro-optical element in the present invention is an element in which optical characteristics such as luminance and transmittance are changed by applying electrical energy such as current and voltage. Typical examples of the electro-optical element are a light-emitting element using an organic EL material and a liquid crystal element using a liquid crystal material, but the scope to which the present invention is applied is not limited to this. For example, liquid crystal elements, inorganic EL elements, field emission (FE) elements, surface-conduction electron (SE) elements, ballistic electron surface emitting (BS) elements, LEDs (Light Various electro-optical elements such as an Emitting Diode) element and an electrophoretic element can be used in the present invention. Further, the planar shape of each electro-optical element and the arrangement thereof are arbitrary. For example, a plurality of electro-optical elements each having the same shape may be arranged in a matrix (dot matrix method), or a plurality of electro-optical elements each formed into a specific shape such as a character or a symbol May be configured (segment system).

  By the way, the detection means in the present invention is a means for generating a detection signal having a level corresponding to the volume around the electro-optical device. As this detection means, in addition to means for directly detecting the sound around the electro-optical device (for example, a sound collecting device such as a microphone), means for detecting a physical quantity that changes in conjunction with the sound volume around the electro-optical device. Can be adopted. For example, in a moving body such as a vehicle, the higher the speed and acceleration of the traveling, the higher the volume inside the moving body where the electro-optical device is installed. Therefore, a means for detecting the speed of the moving body may be employed as the detection means in the present invention. That is, an electronic apparatus according to a specific aspect of the present invention is an electronic apparatus installed in a moving body such as a vehicle, and includes an electro-optical device including a plurality of electro-optical elements, and cooling for cooling the electro-optical device. A mechanism; detection means for detecting the speed of the moving body; and control means for controlling the cooling mechanism such that the higher the speed detected by the detection means is, the higher the cooling capacity is. Also with this configuration, the electro-optical device can be sufficiently cooled while reducing the operation sound sensed by the user using the electro-optical device inside the moving body.

  As a typical example of the cooling mechanism in the present invention, [1] an air-cooled mechanism (fan) that blows or sucks air to the electro-optical device, [2] water-cooling that distributes a fluid serving as a refrigerant to a conduit adjacent to the electro-optical device Or a thermoelectric conversion mechanism that generates heat transfer by a thermoelectric conversion element represented by [3] Peltier element. Among these, in an electronic device employing an air-cooling type cooling mechanism, the control means adjusts the cooling capacity by controlling the rotational speed of the fan. Moreover, in the structure which employ | adopted the water cooling type cooling mechanism, a control means adjusts cooling capacity by controlling the flow volume of the fluid which distribute | circulates a pipe line. Further, in the configuration employing the thermoelectric conversion type cooling mechanism, the control means adjusts the cooling capacity by controlling the electric power supplied to the thermoelectric conversion element. But the aspect of the cooling mechanism in this invention is not limited to the above illustration at all.

  By the way, in a configuration that employs a fan that is an air-cooling type cooling mechanism, when the fan is disposed on the side of the electro-optical device as disclosed in Patent Document 1 and Patent Document 2, a plurality of electro-optical elements are arranged. It is difficult to make the degree of cooling uniform over the entire region where the spheres are arranged. That is, even if the electro-optic element near the fan (ie, near the periphery of the substrate) is cooled, the electro-optic element located far from the fan may not be sufficiently cooled. As described above, when the degree of cooling is uneven, the degree of deterioration differs for each electro-optic element, and as a result, there is a problem that the gradation of each electro-optic element varies. This variation in gradation is perceived by the user as display unevenness in a configuration in which the electro-optical device is used as a display device. In order to solve such a problem, the cooling mechanism includes at least one fan installed on the back side of the electro-optical device in a posture in which the rotation axis is directed in a direction substantially perpendicular to the arrangement surface of each electro-optical element. It is desirable. According to this aspect, since the fan is disposed on the back side of the electro-optical device, each electro-optical element can be uniformly cooled. Therefore, uneven gradation can be suppressed due to non-uniformity in the degree of cooling.

  Further, as the air-cooling type cooling mechanism, a mechanism for blowing air to the electro-optical device can be employed. However, in this configuration, it is difficult to uniformly blow air over the entire region where the electro-optic elements are arranged. Therefore, the fan in the present invention is preferably a mechanism that sucks air in the gap between the electro-optical device and the fan. According to this aspect, the entire region in which the electro-optic elements are arranged can be cooled substantially uniformly.

  Further, in order to realize more efficient cooling, a configuration in which fins (heat radiating plates) are installed in the electro-optical device may be adopted. For example, the fin in this configuration is arranged on the back side of the electro-optical device and protrudes in a direction substantially perpendicular to the arrangement surface of the electro-optical elements. In addition, if the heat conduction part (for example, the heat conduction part 345 shown in FIG. 2) formed of a material having higher thermal conductivity than each fin is interposed between each fin and the electro-optical device, It is possible to further efficiently cool the electro-optical device by promoting thermal diffusion from the electro-optical device to the fins.

  By the way, each electro-optical element itself becomes a heat source. Therefore, in a configuration in which a plurality of electro-optic elements are arranged in a specific region (element region), a region closer to the center than the electro-optic element located in a region (second region) along the periphery of the element region (second region) An electro-optical element located in the first region (that is, an electro-optical element surrounded by another electro-optical element) is likely to have a higher temperature. Therefore, in a desirable aspect of the present invention, the shape of the fin is selected so that the heat generated in the first region is radiated more efficiently. That is, in this aspect, the plurality of fins corresponding to the first region are more densely distributed than the plurality of fins corresponding to the second region near the periphery of the element region.

  The present invention is also specified as a method for controlling an electronic device. This method is a method for controlling an electronic apparatus including an electro-optical device including a plurality of electro-optical elements and a cooling mechanism for cooling the electro-optical device, and is a level corresponding to the volume around the electro-optical device. And a cooling capacity of the cooling mechanism is controlled according to the level of the generated detection signal. Further, in the method of controlling an electronic device installed on a moving body, the speed of the moving body is detected, and the cooling mechanism is controlled so that the higher the detected speed, the higher the cooling capacity. The

  The control means in the present invention is realized not only by hardware such as a DSP (Digital Signal Processor) dedicated to control of the cooling mechanism, but also by cooperation between an arithmetic processing unit such as a CPU (Central Processing Unit) and a program. . The program includes an electro-optical device including a plurality of electro-optical elements, a cooling mechanism that cools the electro-optical device, and a detection unit that generates a detection signal having a level corresponding to the volume around the electro-optical device. The contents of causing the computer of the electronic device to execute control processing for controlling the cooling capacity of the cooling mechanism in accordance with the level of the detection signal generated by the detection means. In addition, the program for controlling the electronic device installed in the moving body is a content that causes the computer to execute a control process for controlling the cooling mechanism so that the cooling capacity increases as the speed of the moving body increases.

<A: Configuration of electronic device>
FIG. 1 is a block diagram showing a configuration of an electronic apparatus according to the present invention. This electronic device D is arranged in a space in which a user is accommodated among various moving bodies such as automobiles, and various information relating to the traveling of the moving body (for example, the speed and rotation speed of the moving body, the remaining amount of fuel, It is an instrument panel (vehicle-mounted instrument) that displays various warnings, and includes a display module 30 that displays these pieces of information as shown in FIG.

  The display module 30 includes an electro-optical device 31 having a large number of electro-optical elements, and a drive circuit 32 that drives the electro-optical device 31. FIG. 2 is a cross-sectional view showing the configuration of the electro-optical device 31 and its peripheral elements. As shown in FIG. 2, the electro-optical device 31 includes a plate-like substrate 311 made of glass or plastic, a large number of electro-optical elements P arranged in a matrix on the surface of the substrate 311, and each electro-optical element. And a light-transmitting sealing plate 313 fixed to the substrate 311 so as to cover P. Each electro-optical element P is an element in which a light emitting layer made of an organic EL material is interposed in a gap between an anode and a cathode. The electro-optical device 31 in this embodiment is a top emission type display device that emits light emitted from each electro-optical element P to the side opposite to the substrate 311 and is used for displaying an image.

  The drive circuit 32 shown in FIG. 1 designates a drive signal (a scanning signal for selecting each electro-optical element and a gradation of each electro-optical element) to each electro-optical element P based on video data supplied from the outside. Data signal) to be supplied, thereby controlling the gradation (luminance) of each electro-optical element P. As a result, a desired image corresponding to the video data is displayed.

  The drive circuit 32 and the electro-optical element P generate heat when displaying an image. In particular, the electro-optical element P using a light emitting layer made of an organic EL material as in the present embodiment is an element driven by the supply of electric current, so that its own heat generation occurs compared to other electro-optical elements such as liquid crystal. It is remarkable. In order to prevent the deterioration of the electro-optical element P due to such heat and extend its life, the display module 30 of the present embodiment has the heat of the electro-optical device 31 as shown in FIG. 1 and FIG. And a fan (blower) 36 for cooling the electro-optical device 31.

  As shown in FIG. 2, the heat radiating unit 34 is installed on the back side of the electro-optical device 31 (that is, the side opposite to the traveling side of the emitted light from the electro-optical element P). More specifically, the heat radiating portion 34 is fixed to the surface on the back side of the substrate 311 by the adhesive 33. The heat dissipating part 34 is spaced from the plate-like base 341 formed in a size slightly larger than the region where the electro-optical elements P are arranged, and the surface of the base 341 opposite to the electro-optical device 31. And a plurality of fins 343 projecting substantially vertically and a heat conduction portion 345 adhered over substantially the entire surface of the base body 341 opposite to the fins 343. The base body 341 and the plurality of fins 343 are integrally formed of a metal such as aluminum (Al). On the other hand, the heat conduction part 345 is a plate-like member formed of a material (for example, a metal such as copper (Cu)) having higher heat conductivity than the base 341 and the fins 343. By thus interposing the heat conducting portion 345 between the fin 343 and the electro-optical device 31, heat diffusion from the electro-optical device 31 to the fin 343 can be promoted.

  FIG. 3 is a plan view schematically showing the structure of the electro-optical device 31 as viewed from the back side. As shown in FIGS. 2 and 3, in the present embodiment, three fans 36 are arranged on the back side of the electro-optical device 31 so as to face the substrate 311 of the electro-optical device 31 with the heat radiating portion 34 interposed therebetween. Is done. Each fan 36 is fixed in a posture in which the rotation axis L is directed in a direction substantially perpendicular to the surface of the substrate 311 (that is, the arrangement surface of the electro-optical element P), and as shown by an arrow in FIG. Air that is present in the gap with the device 31 (that is, air radiated with heat from the fins 343) is sucked and discharged to the outside. As described above, according to the configuration in which the air is sucked from the electro-optical device 31, each electro-optical element P can be cooled evenly as compared with the configuration in which the cooling air is blown to the electro-optical device 31.

  The rotation speed per unit time of the fan 36 is arbitrarily controlled according to the level of the control signal Sc input from the outside. As the number of rotations of the fan 36 increases, the ability to cool the electro-optical device 31 increases. Therefore, it can be said that the control signal Sc is a signal for controlling the cooling capacity of the fan 36. On the other hand, when the fan 36 is operated, an operating sound (for example, a rotating sound of a motor) is generated. This operating noise (hereinafter referred to as “cooling operating noise”) increases as the rotational speed of the fan 36 increases (that is, the cooling capacity increases).

  By the way, an operating noise (hereinafter referred to as “traveling operating noise”) is generated in a power source such as an internal combustion engine or a motor when the moving body travels. The cooling operation sound of the fan 36 that is actually perceived by the user becomes relatively remarkable as the traveling operation sound is smaller. In other words, when the traveling operation sound is loud, the cooling operation sound that is actually perceived by the user is relatively reduced (not much of a concern for the user). In consideration of these circumstances, in the present embodiment, the cooling capacity (more specifically, the rotational speed) of the fan 36 is controlled in accordance with the magnitude of the traveling operation sound. Here, the traveling operation sound increases as the moving body travels at high speed. Therefore, in the present embodiment, the speed of the moving body is detected instead of directly detecting the driving operation sound, and the rotational speed of the fan 36 is controlled according to the detected speed. . The detection device 10 and the control device 20 shown in FIG. 1 are means for realizing such control of the fan 36.

  The detection device 10 is a sensor that detects the speed of the moving body. More specifically, the detection device 10 detects, for example, the rotation of the axle of the moving body, and generates and outputs a detection signal Sv having a level corresponding to the rotation speed (that is, the speed of the moving body). As described above, since the traveling operation sound increases as the moving body travels at a higher speed, the detection device 10 is also grasped as a means for generating the detection signal Sv having a level corresponding to the volume of the traveling operation sound.

  On the other hand, the control device 20 is means for controlling the rotational speed of the fan 36 based on the detection result of the detection device 10, and includes a controller 21 and a D / A converter 23. The detection signal Sv output from the detection device 10 is input to the controller 21. The controller 21 is means for calculating the speed V of the moving body based on the detection signal Sv and outputting the rotational speed R of the fan 36 corresponding to the speed V as digital data. More specifically, the controller 21 designates a larger value as the rotation speed R as the speed V is larger (that is, as the traveling operation sound is larger). In other words, the controller 21 designates a smaller numerical value as the rotational speed R as the speed V is smaller. In addition, the method for calculating the rotation speed R according to the speed V is arbitrary. For example, the controller 21 holds in advance a lookup table in which the speed V and the rotational speed R are associated, and the rotational speed R corresponding to the actual speed V is searched based on the lookup table. Also good. Alternatively, the rotational speed R may be calculated by performing a predetermined calculation on the speed V.

  The D / A converter 23 is means for generating an analog control signal Sc of a level corresponding to the rotational speed R from the digital data output from the controller 21. By supplying this control signal Sc, the fan 36 is controlled to a rotational speed corresponding to the speed V.

  Next, the operation of this embodiment will be described. The controller 21 executes the process of FIG. 4 every time a timer interrupt occurs at a predetermined interval. That is, the controller 21 first specifies the velocity V of the moving body based on the detection signal Sv output from the detection device 10 (step S1). Next, the controller 21 determines whether or not the speed V specified in step S1 is lower than “20 km / h” (step S2a). If this determination is affirmative, the controller 21 outputs digital data designating “0Fh” (where “h” means hexadecimal notation) as the rotational speed R to the D / A converter 23 (step S2b). ). As a result, a control signal Sc of a level corresponding to “0Fh” is output from the D / A converter 23, and the fan 36 rotates at a rotational speed R corresponding to the level of the control signal Sc.

  On the other hand, when the determination in step S2a is negative (that is, when the speed V is “20 km / h” or higher), the controller 21 next determines whether the speed V is lower than “40 km / h” ( Step S3a). If this determination is affirmative, the controller 21 outputs digital data designating “3Fh” as the rotation speed R to the D / A converter 23 (step S3b). As a result, the fan 36 rotates at the rotation speed R corresponding to “3Fh”.

  Thereafter, similarly, the speed V is sequentially compared with a predetermined speed, and the rotation speed R corresponding to the comparison result is designated by the controller 21. That is, when the speed V is greater than or equal to “40 km / h” and less than “60 km / h” (step S4a: Yes), “6Fh” is designated as the rotation speed R (step S4b), and the speed V is “60km / h”. ”Or more and less than“ 80 km / h ”(step S5a: Yes),“ 9Fh ”is designated as the rotation speed R (step S5b), and the speed V is not less than“ 80km / h ”and less than“ 100km / h ”. In some cases (step S6a: Yes), “CFh” is designated as the rotation speed R. Further, when the speed V is “100 km / h” or more (step S6a: No), the maximum value “FFh” is designated as the rotation speed R (step S7). When the rotational speed R is designated in step S2b to step S6b or step S7, the controller 21 ends the process of FIG. 4 and waits for the next timer interruption.

  As described above, in the present embodiment, the fan 36 is controlled so that the rotational speed increases as the speed V increases. In other words, the fan 36 is controlled such that the lower the speed V, the lower the rotational speed. Therefore, when the traveling operation sound perceived inside the moving body is small (that is, when the speed V is low), a situation where the cooling operation sound generated from the fan 36 is perceived as annoying noise by the user is avoided. Is done. On the other hand, when the traveling operation sound perceived inside the moving body is large (that is, when the speed V is high), the cooling capacity of the fan 36 is increased, so that the electro-optical device 31 can be sufficiently cooled. At this time, the running noise is relatively loud, so even if the cooling noise is increased by increasing the cooling capacity, the cooling noise actually perceived by the user is relative to that when the surrounding volume is low. Is suppressed. As described above, according to this embodiment, the electro-optical device 31 can be sufficiently cooled without causing the user to perceive the cooling operation sound as annoying noise.

<B: Modification>
Various modifications can be made to the above embodiment. An example of a specific modification is as follows. In addition, you may combine each following aspect suitably.

(1) Modification 1
In the embodiment, the configuration in which the rotation speed of the fan 36 is controlled based on the speed V of the moving body is exemplified, but the volume around the electro-optical device 31 (more preferably, in the vicinity of the user of the electro-optical device 31). The sound volume may be detected, and the rotational speed of the fan 36 may be controlled according to the sound volume. For example, a sound collecting device (for example, a microphone) that outputs a detection signal Sv having a level corresponding to the surrounding sound volume is adopted as the detection device 10 in FIG. 1, and the controller 21 sets the rotation speed R according to the level of the detection signal Sv to D. A configuration designated in the / A converter 23 is employed. In this configuration, similarly to the embodiment, the cooling operation sound of the fan 36 is reduced when the volume around the electro-optical device 31 is low, while the cooling capacity of the fan 36 is increased when the volume around the electro-optical device 31 is high. By raising, the electro-optical device 31 can be sufficiently cooled. Further, instead of the configuration of the embodiment, the rotation speed of the fan 36 may be controlled according to the acceleration of the moving body. As described above, in the present invention, a configuration in which the detection unit detects a physical quantity (including speed V and acceleration in addition to volume) that changes in conjunction with the volume around the electro-optical device 31 is sufficient.

(2) Modification 2
In the embodiment, the configuration in which the present invention is adopted in the instrument panel is illustrated, but the present invention can be applied to various other electronic devices. For example, electronic devices in which electro-optical devices are used as display devices include personal computers, mobile phones, digital still cameras, televisions, video cameras, car navigation devices, pagers, electronic notebooks, electronic paper, calculators, word processors, workstations Video phones, POS terminals, printers, scanners, copiers, video players, devices with touch panels, and the like. However, the use of the electro-optical device in the electronic apparatus of the present invention is not limited to image display. For example, in an image forming apparatus such as an optical writing type printer or an electronic copying machine, a writing head that exposes a photosensitive member according to an image to be formed on a recording material such as paper is used. Also, the electro-optical device according to the present invention is used. That is, the electronic apparatus according to the present invention includes an apparatus that does not display an image, such as an image forming apparatus. Note that in an electronic device that is not assumed to be installed on a moving body, the speed of the moving body cannot be used as a reference for controlling the cooling mechanism. Therefore, in this type of electronic device, for example, as described in the first modification, a configuration in which the surrounding volume is detected by a device such as a microphone and the cooling mechanism is controlled according to the detection result is adopted. The

(3) Modification 3
In the embodiment, a configuration in which a plurality of fins 343 are arranged at equal intervals is illustrated. However, depending on the arrangement of the electro-optic elements P, the temperature is not uniform, such that a specific area in the area where these electro-optical elements P are arranged (hereinafter referred to as “element area”) is hotter than other areas. It may become. Therefore, it is desirable to select the shape of the heat radiating portion 34 so that efficient cooling is realized even under such a configuration.

  For example, assume a configuration in which electro-optic elements P are arranged in a matrix in the element region A as shown in FIG. Each of the electro-optic elements P belonging to the central area A1 in the element area A is surrounded by other electro-optic elements P over the entire circumference. On the other hand, the electro-optical element P located in the area A2 closer to the periphery of the element area A than the area A1 is not completely surrounded by the other electro-optical elements P. Here, considering that each electro-optical element P serves as a heat source, each electro-optical element P belonging to the region A1 is electro-optic in the region A2 by the amount surrounded by a larger number of heat sources (electro-optical elements P). It can be said that the temperature is higher than that of the element P. Therefore, as shown in FIG. 6, the interval d1 between the fins 343 overlapping the region A1 is narrower than the interval d2 between the fins 343 overlapping the region A2 (that is, the plurality of fins 343 corresponding to the region A1 are arranged). The shape of the heat radiating portion 34 is selected so that it is more densely distributed than the plurality of fins 343 corresponding to the region A2. In this configuration, the fins 343 in the region A1 arranged at a narrow distance d1 from each other have higher heat radiation capability than the fins 343 in the region A2, so that the element region A in the element region A is caused by the arrangement of the electro-optic elements P. The electro-optical device 31 can be efficiently cooled even in a configuration in which the temperature is not uniform.

It is a block diagram which shows the structure of the electronic device which concerns on embodiment of this invention. It is sectional drawing which shows the structure of an electro-optical apparatus and its peripheral element. It is a top view which shows a mode that the fan is arrange | positioned at the back side of the electro-optical apparatus. It is a flowchart for demonstrating operation | movement of a controller. It is a top view which shows the aspect of the arrangement | sequence of the electro-optical element which concerns on a modification. It is sectional drawing which shows the shape of the thermal radiation part which concerns on a modification.

Explanation of symbols

D …… Electronic equipment, 10 …… Detection device, 20 …… Control device, 21 …… Controller, 23 …… D / A converter, 31 …… Electro-optic device, P …… Electro-optic element, 34 …… Heat dissipation Part, 343 ... fin, 345 ... heat conduction part, 36 ... fan.

Claims (10)

An electro-optical device including a plurality of electro-optical elements;
A cooling mechanism for cooling the electro-optical device;
Detecting means for detecting a surrounding volume of the electro-optical device and generating a detection signal having a level corresponding to the detected surrounding volume;
Electronic equipment comprising: control means for controlling the cooling capacity of the cooling mechanism according to the level of the detection signal generated by the detection means. An electronic device installed on a moving body,
An electro-optical device including a plurality of electro-optical elements;
A cooling mechanism for cooling the electro-optical device;
Detecting means for detecting the speed of the moving body;
An electronic apparatus comprising: control means for controlling the cooling mechanism such that the higher the speed detected by the detecting means is, the higher the cooling capacity is. The cooling mechanism includes a fan that blows or sucks air to the electro-optical device,
The electronic device according to claim 1, wherein the control unit controls a rotation speed of the fan. The cooling mechanism includes at least one fan installed on the back side of the electro-optical device in a posture in which a rotation axis is directed in a direction substantially perpendicular to an arrangement surface of the electro-optical elements. The electronic device as described in. The electronic apparatus according to claim 4, wherein the fan sucks air in a gap between the electro-optical device and the fan. The electronic apparatus according to claim 1, further comprising a plurality of fins disposed on a back side of the electro-optical device and projecting in a direction substantially perpendicular to an arrangement surface of the electro-optical elements. The electronic apparatus according to claim 6, further comprising a heat conduction unit that is formed of a material having a higher thermal conductivity than the fins and is interposed between the fins and the electro-optical device.   Among the element regions in which the plurality of electro-optic elements are distributed, the plurality of fins corresponding to the first region closer to the center than the plurality of fins corresponding to the second region closer to the periphery of the element region than the first region. The electronic device according to claim 6, wherein the electronic device is also densely distributed. A method for controlling an electronic apparatus comprising: an electro-optical device including a plurality of electro-optical elements; and a cooling mechanism that cools the electro-optical device,
Generating a detection signal having a level corresponding to the volume around the electro-optical device;
An electronic device control method for controlling a cooling capacity of the cooling mechanism according to a level of the generated detection signal. A method for controlling an electronic apparatus comprising: an electro-optical device including a plurality of electro-optical elements; and a cooling mechanism that cools the electro-optical device,
Detect the speed of the moving object where the electronic device is installed,
An electronic device control method for controlling the cooling mechanism such that the higher the detected speed is, the higher the cooling capacity is.

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