JP2012133254A - Outdoor display system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an outdoor display system capable of cooling a storage battery and a controller efficiently.SOLUTION: An outdoor display system includes a solar battery, a storage battery for storing electric power, a display device for displaying contents, a controller for supplying electric power obtained by the solar battery to the storage battery or the display device, a cooling case provided with air inlets and air outlets, and a fan provided inside the cooling case and for generating an air flow flowing from the air inlets to the air outlets. The storage battery and the controller are housed inside the cooling case.

Description

  The present invention relates to an outdoor display system suitable for outdoor use.

  In recent years, an advertising medium called digital signage that displays video and information on a flat display or the like using digital technology for display and communication has appeared. These terminals (advertisement media) are also used in public transportation stops such as bus stops (Patent Document 1).

  For such advertising media, an outdoor display device manufactured for outdoor use is used. Outdoors are greatly affected by seasonal fluctuations in temperature, direct sunlight, and the like, and particularly outdoors in the midsummer in hot weather, the temperature may be as high as would not be expected indoors.

JP 2009-294284 A (FIG. 3) JP-A-11-344554

  By the way, as a power source for a display device for outdoor use, it is conceivable to use a solar cell in view of being used outdoors. When doing in this way, the said display apparatus is installed outdoors as an outdoor display system provided with the solar cell and the storage battery. In this case, the outdoor display system also includes a controller (controller module) that supplies the generated power of the solar battery to the storage battery and the display device.

  In addition, as described above, outdoors, there are large effects of temperature fluctuations and direct sunlight due to the season. Therefore, it is important that the outdoor display system has a specification that can withstand such a situation and does not cause a malfunction.

  In particular, the above-described storage battery, controller, etc. tend to generate heat, and if the temperature becomes too high, there is a risk that they will not operate normally. Therefore, it is necessary to efficiently cool these so that the temperature does not become too high.

  In view of the problems described above, an object of the present invention is to provide an outdoor display system that can efficiently cool a storage battery and a controller.

  An outdoor display system according to the present invention includes a solar cell, a storage battery that stores electric power, a display device that displays content, a controller that supplies the electric power obtained by the solar cell to the storage battery or the display device, A cooling case provided with an intake port and an exhaust port; and a fan for generating an air flow flowing from the intake port to the exhaust port inside the cooling case, wherein the storage battery and the controller It is assumed that the case is housed inside the case.

  According to this configuration, an air flow can be efficiently generated inside the cooling case. Therefore, it becomes possible to cool a storage battery and a controller efficiently.

  Moreover, in the said structure, when electric power is supplied to the said display apparatus, it is good also as a structure provided with the inverter which converts the state of this electric power, and the said inverter is also accommodated in the inside of the said cooling case. According to this configuration, the inverter can also be efficiently cooled.

  More specifically, in the configuration described above, the cooling case forms a substantially rectangular parallelepiped casing, the intake port is provided on a side surface of the casing, and the exhaust port is opposite to the casing. It is good also as a structure provided in the side surface of the side.

  In the outdoor display system having the above-described configuration in which a plurality of fans are provided in each of the intake port and the exhaust port, more specifically, a temperature sensor for detecting temperature is provided, and the detection of the temperature sensor is performed. It is good also as a structure which adjusts the rotational speed or drive number of the said fan according to a result.

  Moreover, specifically as said structure, the said inverter is good also as a structure arrange | positioned in the position near the said inlet port rather than the said storage battery and the said controller inside the said cooling case. According to this configuration, the inverter can be cooled particularly efficiently.

  As described above, according to the outdoor display system of the present invention, it is possible to efficiently generate an air flow inside the cooling case. Therefore, it becomes possible to cool a storage battery and a controller efficiently.

1 is a perspective view of an outdoor display system according to a first embodiment of the present invention. It is another perspective view of the said outdoor display system. It is a side view of the outdoor display system. It is a block diagram regarding the structure of the said outdoor display system. 1 is an external view of a display device according to a first embodiment of the present invention. It is sectional drawing of the said display apparatus. It is another sectional view of the display. It is an external view of the cooling case which concerns on 1st Embodiment of this invention. It is sectional drawing of the said cooling case. It is a block diagram regarding the structure of the outdoor display system which concerns on 2nd Embodiment of this invention. It is sectional drawing of the cooling case which concerns on 2nd Embodiment of this invention.

  Embodiments (first embodiment and second embodiment) of the present invention will be described below by taking an outdoor display system used outdoors as an example.

1. First Embodiment [Configuration of Outdoor Display System, etc.]
First, the first embodiment will be described. Each of FIGS. 1 to 3 is an external view of the outdoor display system 9. 1 is a diagram (perspective view) viewed from an oblique front, FIG. 2 is a diagram (perspective view) viewed from an oblique rear, and FIG. 3 is a diagram (side view) viewed from the side.

  As shown in these drawings, the outdoor display system 9 includes a main body case 91 in which the display device 4, the cooling case 7, and the like are accommodated. The display device 4 is provided with a touch panel 46 and an illuminance sensor 50b (see FIG. 5 and the like), which are exposed from the front surface of the main body case 91. The detailed configuration and role of the display device 4 and the cooling case 7 will be apparent from the description to be described later.

  A leg portion 92 that can be fixed to the ground is provided at a lower portion of the main body case 91, and the outdoor display system 9 can be fixedly installed outdoors. An opening 91 a is provided on the lower bottom surface of the main body case 91. In the opening 91a, the inside and the outside of the main body case 91 are electrically connected, and air can freely enter and exit. The openings 91a are provided on both the left and right sides of the lower bottom surface of the main body case 91 so as to correspond to an intake duct and an exhaust duct described later. Further, a roof 94 is provided on the upper portion of the main body case 91 so as to be supported by the support portion 93. A solar panel 95 that receives sunlight is laid on the top surface of the roof 94. The angle of the roof 94 is appropriately set so that sunlight is efficiently incident on the solar cell panel 95.

  FIG. 4 is a block diagram showing the configuration of the outdoor display system 9. As shown in this figure, the outdoor display system 9 includes a solar cell 1, a storage battery 2, a controller (control module) 3, a display device 4, a power supply cooling fan 5, a fan control device 6, an inverter 8, and the like.

  The solar cell 1 is formed of a solar cell panel 95 or the like, and generates power by photoelectrically converting received sunlight. Note that the solar cell 1 outputs a DC voltage. The magnitude of the DC voltage is, for example, around 50 V, but varies depending on the amount of power generation. The storage battery 2 is, for example, a lithium ion battery (battery pack).

  The controller 3 supplies the power generated by the solar cell 1 to the storage battery 2 and the display device 4. In principle, the controller 3 supplies most of the power generated by the solar cell 1 to the display device 4 as it is, and stores surplus power (difference power between the power generated by the solar cell 1 and the power consumption of the display device 4) as a storage battery. 2 is supplied. However, the controller 3 supplies power from the storage battery 2 to the display device 4 when the generated power is insufficient (for example, at night or in the rain).

  The controller 3 is connected to an inverter 8 that converts DC power into AC power. For example, when power is supplied to the display device 4 through the controller 3, the inverter 8 converts DC power (supplied power) output from the controller 3 to AC power equivalent to that of a commercial power source (for example, voltage is 100 V and frequency is 60 Hz). ) And sent to the display device 4 (power supply circuit 47 described later). In the present embodiment, a general-purpose television receiver (operating using a commercial power source) is employed as the display device 4. The conversion of power by the inverter 8 is performed in order to enable appropriate power supply to the television receiver.

  When such conversion operation is not necessary (when the power supply circuit 47 accepts supply of DC power), the installation of the inverter 8 may be omitted. The case where the installation of the inverter 8 is omitted will be described later as a second embodiment. Further, the storage battery 2, the controller 3, and the inverter 8 are accommodated in the cooling case 7 so as to be sufficiently cooled. This point will be described in detail again.

  The display device 4 is a liquid crystal display device that displays content, and includes a receiving unit 41, a storage unit 42, a display control unit 43, a liquid crystal panel (liquid crystal display panel) 44, a backlight 45, a touch panel 46, a power supply circuit 47, and a control unit. 48, a panel cooling fan 49, a temperature sensor 50a, an illuminance sensor 50b, and the like.

  The receiving unit 41 is a content signal (a signal including content such as advertising content) transmitted from an external content server (for example, an ASP server, a personal computer, etc.) by wireless communication (for example, a system such as WiMAX, IEEE802.11b / g). ) And a signal processing unit that performs demodulation processing on the signal received by the antenna.

  If the content signal is, for example, a signal in the MPEG2-TS format modulated and transmitted by the OFDM method, the receiving unit 41 performs OFDM modulation and extracts the MPEG2-TS signal. The content signal that has undergone predetermined processing by the receiving unit 41 is transmitted to the storage unit 42.

  The storage unit 42 receives and stores the content signal from the receiving unit 41. When the content is real-time content (when the received content is displayed immediately), the storage unit 42 functions as a buffer memory. When the content is content that is displayed in response to a user operation or content that is displayed based on a preset time schedule, the storage unit 42 functions as a storage medium.

  The display control unit 43 includes a display control circuit that performs display control on the liquid crystal panel 44. The display control circuit performs image processing of the content and the like so that the content is appropriately displayed on the liquid crystal panel 44. The display control circuit is arranged on the back side of the liquid crystal panel 44.

  The liquid crystal panel 44 modulates liquid crystal corresponding to each pixel in accordance with display control by the display control unit 43. Thereby, the liquid crystal panel 44 changes the light transmittance of the backlight 45 and displays the content (image) as a whole. The backlight 45 irradiates the liquid crystal panel 44 with white light. For example, a cold cathode tube (CCFL) or an LED is used.

  The touch panel 46 is formed as a capacitive transparent touch panel, and is disposed on the front surface side of the liquid crystal panel 44 (more specifically, on the front glass disposed on the front surface of the liquid crystal panel 44). The touch panel 46 detects a position touched by the user's finger and transmits the information to the control unit 48.

  The power supply circuit 47 supplies power to each part of the display device 4 using power supplied from the outside (controller 3 side). Note that the power supply circuit 47 can convert the power into a direct current and supply power to each part of the display device 4 even when a commercial power supply (for example, an AC power supply with a voltage of 100 V and a frequency of 60 Hz) is supplied. It has become. That is, the power supply circuit 47 converts AC power supplied from the outside into DC (for example, DC voltage such as 24V, 12V, 5V, etc.). The supplied power is used to execute various operations such as content display and panel cooling fan 49 drive. The control unit 48 is formed by a CPU [Central Processing Unit] or the like, and controls each unit in the display device 4 so that the display device 4 operates appropriately.

  The panel cooling fan 49 is a fan for cooling the inside of the display device 4 (particularly, the liquid crystal panel 44 and the touch panel 46), and is a general term for the six fans A1 to A6. Note that the three fans A1 to A3 are intake fans 49a that urge intake from the outside to the inside of the display device 4, and the three fans A4 to A6 are from the inside of the display device 4 to the outside. This is an exhaust fan 49b for urging the exhaust air.

  The temperature sensor 50a is a thermistor provided on the display control circuit described above. Information on the temperature detected by the temperature sensor 50 a is used for display control of the liquid crystal panel 44. Information on the temperature detected by the temperature sensor 50 a is transmitted to the control unit 48 and can be used for driving control of the panel cooling fan 49. The type and position of the temperature sensor 50a can be in other forms.

  The illuminance sensor 50b is provided outside the front surface of the display device 4 (see FIG. 5) and detects illuminance. Information on the illuminance detected by the illuminance sensor 50 b is transmitted to the control unit 48 and can be used for drive control of the panel cooling fan 49. A plurality of various sensors (50a, 50b) may be provided. In this case, for example, an average value, a maximum value, a minimum value, or the like of the detection values is appropriately calculated, and the calculated value can be adopted as the detection value.

  The power supply cooling fan 5 is a fan for cooling the controller 2, the storage battery 3, and the inverter 8, and is a generic name for the six fans B <b> 1 to B <b> 6. All the power supply cooling fans 5 are attached to the cooling case 7.

  Note that the three fans B1 to B3 are intake fans 5a that urge intake from the outside to the inside of the cooling case 7, and the three fans B4 to B6 are from the inside to the outside of the cooling case 7. This is an exhaust fan 5b for urging the exhaust air. The driving of the power supply cooling fan 5 is controlled by a fan control device 6. The fan control device 6 is attached to, for example, the cooling case 7 and controls the driving of the power supply cooling fan 5 using the power supplied from the controller 3 side.

[Detailed configuration of display device]
Next, a detailed configuration of the display device 4 will be described with reference to a cooling mechanism using the panel cooling fan 49.

  FIG. 5 is an external view of the display device 4 (a diagram viewed from an oblique front). FIG. 6 is a cross-sectional view of the display device 4 when cut along a horizontal plane. FIG. 7 is a cross-sectional view of the display device 4 when cut along a vertical plane including the line segment X of FIG.

  As shown in these drawings, the display device 4 has a front cabinet FC and a back cabinet BC coupled in the front-rear direction to form a substantially integrated housing. An intake duct 11 or an exhaust duct 12 is attached to the side surface of the back cabinet BC.

  A liquid crystal panel 44 is provided inside the back cabinet BC, and a backlight 45 is also provided thereafter. The front cabinet FC is provided with a transparent front glass 13 (a kind of transparent member) at a position facing the liquid crystal panel 44. A touch panel 46 is provided on the front surface of the front glass 13.

  The light of the content (image) displayed on the liquid crystal panel 44 is delivered forward through the front glass 13 and the touch panel 46. As shown in FIG. 1, since the touch panel 46 is exposed forward, an observer (passerby or the like) in front of the outdoor display system 9 can see the displayed content. It has become.

  By the way, in the display device 4, the liquid crystal panel 44, in particular, is strongly heated by the backlight. Further, if the temperature of the liquid crystal panel becomes too high, there is a possibility that display failure (blackout) due to liquefaction of the liquid crystal may occur. Therefore, cooling the liquid crystal panel 44 is particularly important. It is also important to cool the touch panel 46 in order to prevent malfunction of the touch panel 46 due to temperature changes.

  Therefore, the display device 4 is provided with a cooling mechanism for efficiently cooling the liquid crystal panel 44 and the touch panel 46 in particular. The form of this cooling mechanism will be described below.

  A flow path (space) SP for flowing air is provided inside the housing of the display device 4. As shown in FIG. 6, the flow path SP is configured to reach the exhaust port 15 from the intake port 14 via the space between the liquid crystal panel 44 and the front glass 13. As shown in FIG. 7, the air inlets 14 are provided at three locations on the side surface of the display device 4 (back cabinet BC) so as to be arranged in the vertical direction. The exhaust ports 15 are provided at three locations on the opposite side surface of the display device 4 (back cabinet BC) so as to be arranged in the vertical direction. Note that a filter for preventing rain or dust from entering the display device 4 may be provided in the intake port 14 and the exhaust port 15.

  Of the panel cooling fans 49, the intake fans 49 a (fans A <b> 1 to A <b> 3) are provided in each of the intake ports 14. The exhaust fan 49b (fans A4 to A6) is provided in each of the exhaust ports 15.

  As the panel cooling fan 49 rotates, the air flow in the direction from the intake port 14 to the exhaust port 15, that is, the direction indicated by the arrow FL in FIGS. Thus, in the display device 4, a cooling mechanism is formed by the panel cooling fan 49, the flow path SP, and the like.

  That is, when the panel cooling fan 49 is rotated, an air flow that flows from the intake port 14 to the exhaust port 15 is generated in the flow path SP including between the liquid crystal panel 44 and the front glass 13. As a result, this air flow removes heat from the liquid crystal panel 44 and the front glass 13, and the touch panel 46 provided on the liquid crystal panel 44 and the front glass 13 can be efficiently cooled.

  Note that as the rotational speed (the number of revolutions per unit time) or the number of drives (the number of fans to be driven) of the panel cooling fan 49 is increased, the momentum of the air flow is increased and stronger cooling is realized. However, as this is done, power consumption increases and noise generally increases. Therefore, the driving of the panel cooling fan 49 is controlled to such an extent that cooling is performed without excess or deficiency. The method for controlling the panel cooling fan 49 will be described in detail again.

  An intake duct 11 is attached to the side of the display device 4 on the side where the intake port 14 is provided. The intake duct 11 has a shape extending in the vertical direction along the side surface of the back cabinet BC so as to cover all of the intake ports 14 from the outside.

  Further, a duct intake port 11a that opens downward (toward the opening 91a) is provided at the lower end of the intake duct 11 (at a position lower than each intake port 14). The intake duct 11 forms a space (air flow path) that is open only at the duct intake port 11 a and each intake port 14.

  The intake duct 11 has the form described above, and air that has entered from the outside of the main body case 91 flows into the duct intake port 11a through the opening 91a. The intake duct 11 serves to guide the air flowing from the duct intake port 11a to each intake port 14 and to make it difficult for rain, dust, and the like to reach the intake port 14.

  It should be noted that rain and dust often fall from the upper side (goes downward). However, since the duct intake port 11a is opened downward, rain and dust enter the intake duct 11 itself. It has become difficult. Further, the intake duct 11 extends in the vertical direction, and the duct intake port 11a is provided at a low position. For these reasons, according to the intake duct 11, it is possible to sufficiently prevent rain, dust, and the like from reaching the intake port 14.

  An exhaust duct 12 is attached to the side of the display device 4 on the side where the exhaust port 15 is provided. The exhaust duct 12 has a shape extending in the vertical direction along the side surface of the back cabinet BC so as to cover the entire exhaust port 15 from the outside.

  Further, a duct exhaust port 12a that opens downward (toward the opening 91a) is provided at the lower end of the exhaust duct 12 (at a position lower than each exhaust port 15). The exhaust duct 12 forms a space (air flow path) that is open only at the duct exhaust port 12 a and each exhaust port 15.

  The exhaust duct 12 has the above-described form, and guides the air discharged from each exhaust port 15 to the duct exhaust port 12a and plays a role of making it difficult for rain or dust to reach the exhaust port 15. The air guided to the duct exhaust port 12a is further discharged to the outside of the main body case 91 through the opening 91a. Since the duct exhaust port 12a is opened downward, it is difficult for rain, dust and the like to enter the exhaust duct 12 itself. Further, the exhaust duct 12 extends in the vertical direction, and the duct exhaust port 12a is provided at a low position. For these reasons, according to the exhaust duct 12, it is possible to sufficiently suppress rain, dust, and the like from reaching the exhaust port 15.

  As described above, in the display device 4, it is difficult for rain / dust to reach the intake port 14 and the exhaust port 15, so that it is difficult for rain / dust to enter the display device 4. Further, when a filter is provided at the intake port 14 or the exhaust port 15, clogging of the filter due to rain, dust or the like is suppressed as much as possible, and the air flow inside the display device 4 is promoted. .

[Control method for panel cooling fan]
The display device 4 appropriately drives the panel cooling fan 49 to cool the display device 4. The driving of the panel cooling fan 49 can be controlled by various control methods.

  Here, specific examples of the control method are based on the detection result of the temperature sensor 50a (first control method), based on the detection result of the illuminance sensor 50b (second control method), and both of these sensors. Each of the methods (third control method) based on the detection results of (50a, 50b) will be described below.

  First, according to the first control method, the driving of the panel cooling fan 49 is controlled such that the higher the temperature detected by the temperature sensor 50a, the higher the rotational speed of the fan or the number of drives. For example, when the detected temperature exceeds a predetermined threshold value α1, the driving of the panel cooling fan 49 is controlled so that the rotational speed of the fan or the number of drives increases compared to the normal time (when it does not exceed). .

  As a result, the display device 4 can be cooled as much as possible. That is, the display device 4 can be cooled so as to achieve both suppression of temperature rise and reduction of power consumption as much as possible. In order to suppress the occurrence of malfunction of the touch panel 46, the temperature change rate of the display device 4 may be considered as small as possible. When changing the rotation speed or the number of drive of the panel cooling fan 49, the change speed of the display device 4 can be reduced by gradually increasing the change.

  Further, according to the second control method, when the detected illuminance of the illuminance sensor 50b exceeds the predetermined threshold value α2, the rotational speed of the fan or the number of drives is increased as compared with the normal time (when not exceeding). The driving of the panel cooling fan 49 is controlled. The threshold value α2 is set to a value (for example, 10,000 lux) that is assumed to be exceeded when exposed to direct sunlight.

  Accordingly, strong cooling is performed in a situation where the display device 4 is exposed to direct sunlight, that is, a situation where a rapid temperature rise is assumed, and it is possible to suppress the temperature of the display device 4 from becoming excessively high. It becomes.

  According to the illuminance sensor 50b, it is possible to detect that it has been in direct sunlight before the temperature rise due to this, and as a result, it can be detected more quickly than the temperature sensor. It is. Therefore, according to the second control method, the temperature rise can be suppressed in advance by quickly detecting that it has been exposed to direct sunlight and increasing the cooling before the temperature rise occurs.

  Further, according to the third control method, when the detected temperature of the temperature sensor 50a exceeds the threshold value α1, or when the detected illuminance of the illuminance sensor 50b exceeds the threshold value α2, the rotational speed of the fan or The driving of the panel cooling fan 49 is controlled so that the number of drives increases.

  According to the third control method, as in the case of the second control method, it is quickly detected that a direct sunlight has been applied, and the temperature rise is increased by increasing the cooling before the temperature rise occurs. It is possible to suppress in advance. Further, according to the third control method, even when a temperature rise not caused by direct sunlight (temperature rise due to increase in outside air temperature or internal heat generation) occurs, this is detected by the temperature sensor 50a, and cooling is performed. It is possible to suppress the temperature rise by strengthening.

[About the cooling mode of storage batteries]
As described above, the storage battery 2, the controller 3, and the inverter 8 are installed in the main body case 91 while being housed in the cooling case 7. This point will be described in detail below.

  FIG. 8 is an external view (perspective view) of the cooling case 7 in which the storage battery 2 and the like are stored. In addition, the dotted line in FIG. 8 represents a mode that the storage battery 2 grade | etc., Is arrange | positioned. FIG. 9 is a cross-sectional view (when cut along a vertical plane) of the cooling case 7 in which the storage battery 2 and the like are stored.

  As shown in these drawings, the cooling case 7 forms a rectangular parallelepiped housing, and the storage battery 2, the controller 3, and the inverter 8 are accommodated therein. Three intake ports 71 are provided on one side surface of the casing so as to be arranged in the vertical direction, and three exhaust ports 72 are provided on the opposite side surface so as to be arranged in the vertical direction. It has been.

  Of the power supply cooling fans 5, the intake fans 5 a (fans B <b> 1 to B <b> 3) are provided in each of the intake ports 71. The exhaust fan 5b (fans B4 to B6) is provided in each of the exhaust ports 72.

  As the power supply cooling fan 5 rotates, air is blown in the cooling case 7 in the direction from the air inlet 71 to the air outlet 72, that is, in the direction indicated by the arrow FL in FIG. That is, when the power supply cooling fan 5 is rotated, an air flow flowing from the intake port 71 to the exhaust port 72 is generated inside the cooling case 7. As a result, this air flow takes heat from the storage battery 2, the controller 3, and the inverter 8, and these can be efficiently cooled.

  The inside of the cooling case 7 is substantially sealed except for the intake port 71 and the exhaust port 72 so that air dispersion is suppressed. For this reason, when the power supply cooling fan 5 is rotated, it is possible to efficiently generate an air flow inside the cooling case 7. Thereby, the outdoor display system 9 can cool the storage battery 2, the controller 3, and the inverter 8 efficiently.

  In addition, since the electric power required for the operation | movement (an image process, a display, etc.) of the display apparatus 4 is not so large, normally the emitted-heat amount of the storage battery 2 does not become so large. That is, the display device 4 is often operated continuously and consumes a large amount of power, but the instantaneous power consumption is small, so that the storage battery 2 does not generate excessive heat. On the other hand, it can be said that the inverter 8 usually generates heat more easily than the storage battery 2 or the like because the conversion loss in the power conversion changes to heat. Therefore, with respect to the arrangement form inside the cooling case 7, the inverter 8 that generates heat relatively easily is arranged at a position closer to the intake port 71 than the storage battery 2 and the controller 3. As described above, the inverter 8 is arranged on the upstream side of the air flow compared to the storage battery 2 and the controller 3, and can be cooled more efficiently.

  For example, when the controller 3 is arranged above the storage battery 2 as shown in FIG. 9, the controller 3 may be placed directly on the storage battery 2, and the controller 3 is placed on a shelf or the like in order to increase heat dissipation efficiency. (The controller 3 and the storage battery 2 are separated).

  The cooling case 7 is also provided with an intake duct 73 and an exhaust duct 74 as in the display device 4 described above. Since these configurations and roles are basically the same as those of the intake duct 11 and the exhaust duct 74 attached to the display device 4, detailed description thereof is omitted here.

  The storage battery 2, the controller 3, and the inverter 8 housed in the cooling case 7 may not operate normally if the temperature becomes too high (particularly if the temperature exceeds the rated temperature). Therefore, the fan control device 6 appropriately drives the power supply cooling fan 5 so as to prevent such a situation from occurring, and cools them.

  The driving of the power supply cooling fan 5 can also be controlled by various control methods as in the case of the panel cooling fan 49, and the first to third control methods described above, or in accordance therewith. It is possible to apply various control methods. That is, it is possible to adjust the rotational speed of the fan and the number of drives according to the detection result of the temperature sensor 50a and the like.

  In addition, when a temperature sensor is directly attached to the storage battery 2 or the like, and the temperature detected by the temperature sensor exceeds a predetermined threshold, the power supply speed is increased so that the rotational speed of the fan or the number of drives increases compared to when the temperature does not exceed the predetermined threshold. The driving of the cooling fan 5 may be controlled. Further, the number of fans driven may be set according to the season. For example, all the power supply cooling fans 5 may be driven in summer, and one intake fan 5a and one exhaust fan 5b may be driven in winter.

2. Second Embodiment Next, a second embodiment will be described. The second embodiment is basically the same as the first embodiment except that the inverter 8 is not used and related points. In the description of the second embodiment, emphasis is placed on differences from the first embodiment, and description of common points is omitted.

  The power supply circuit 470 according to the present embodiment is similar to the first embodiment in that power is supplied to each unit of the display device 40 using power supplied from the outside (controller 3 side). . However, the power supply circuit 470 according to the present embodiment has a specification dedicated to an outdoor display system, for example. Supply power to each part.

  FIG. 10 is a block diagram showing the configuration of the outdoor display system 90 according to this embodiment. As shown in this figure, in the outdoor display system 90 according to the present embodiment, unlike the case of the first embodiment, the inverter 8 is not provided. That is, the power supplied from the controller 3 to the power supply circuit 470 is not converted from direct current to alternating current.

  FIG. 11 shows a cross-sectional view (when cut along a vertical plane) of the cooling case 7 according to the present embodiment. As shown in the figure, unlike the case of the first embodiment, only the storage battery 2 and the controller 3 are accommodated in the cooling case 7 according to the present embodiment. That is, in the present embodiment, the inverter 8 is not necessary, and thus is not housed in the cooling case 7. In addition, the arrangement | positioning form of the storage battery 2 and the controller 3 shown in FIG. 11 is an example, and another form may be employ | adopted.

  In the first embodiment, since the power is converted from direct current to alternating current by the inverter, the power loss is large. However, in this embodiment, since the direct current is transmitted to the display device as it is, the power loss can be small. However, the display device needs to have specifications that allow DC power to be input.

  As mentioned above, although embodiment of this invention was described, this invention is not limited to this content. The embodiments of the present invention can be variously modified without departing from the gist of the present invention.

  The present invention can be used for an outdoor display system used outdoors.

DESCRIPTION OF SYMBOLS 1 Solar cell 2 Storage battery 3 Controller 4 Display apparatus 5 Power supply cooling fan 5a Intake fan 5b Exhaust fan 6 Fan control apparatus 7 Cooling case 8 Inverter 9 Outdoor display system 11 Intake side duct 11a Duct inlet 12 Exhaust side duct 12a Duct exhaust 13 Front glass (transparent material)
DESCRIPTION OF SYMBOLS 14 Intake port 15 Exhaust port 41 Reception part 42 Accumulation part 43 Display control part 44 Liquid crystal panel 45 Backlight 46 Touch panel 47 Power supply circuit 48 Control part 49 Cooling fan for panels 49a Intake fan 49b Exhaust fan 50a Temperature sensor 50b Illuminance sensor 71 Inlet part 72 Exhaust port 73 Intake side duct 73a Duct intake port 74 Exhaust side duct 74a Duct exhaust port 91 Main body case 92 Leg portion 93 Support portion 94 Roof 95 Solar panel FC Front cabinet BC Back cabinet

Claims (5)

Solar cells,
A storage battery for storing electric power;
A display device for displaying content;
A controller for supplying the power obtained by the solar cell to the storage battery or the display device;
A cooling case provided with an intake port and an exhaust port;
A fan that generates an air flow that flows from the intake port to the exhaust port inside the cooling case;
The outdoor display system, wherein the storage battery and the controller are housed in the cooling case. When power is supplied to the display device, an inverter that converts the state of the power is provided.
The outdoor display system according to claim 1, wherein the inverter is also housed in the cooling case. The cooling case forms a substantially rectangular parallelepiped housing,
The outdoor display system according to claim 2, wherein the intake port is provided on a side surface of the housing, and the exhaust port is provided on a side surface opposite to the housing. The outdoor display system according to claim 2 or 3, wherein a plurality of the fans are provided in each of the intake port and the exhaust port.
Equipped with a temperature sensor to detect the temperature,
An outdoor display system, wherein a rotational speed or a drive number of the fan is adjusted according to a detection result of the temperature sensor. Inside the cooling case,
The outdoor display system according to any one of claims 2 to 4, wherein the inverter is disposed closer to the intake port than the storage battery and the controller.