WO2012090548A1 - Display device and outdoor display system - Google Patents

Display device and outdoor display system Download PDF

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Publication number
WO2012090548A1
WO2012090548A1 PCT/JP2011/068998 JP2011068998W WO2012090548A1 WO 2012090548 A1 WO2012090548 A1 WO 2012090548A1 JP 2011068998 W JP2011068998 W JP 2011068998W WO 2012090548 A1 WO2012090548 A1 WO 2012090548A1
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WO
WIPO (PCT)
Prior art keywords
display
display panel
panel
display device
fan
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Application number
PCT/JP2011/068998
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French (fr)
Japanese (ja)
Inventor
智功 吉田
細見　達也
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三洋電機株式会社
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Publication of WO2012090548A1 publication Critical patent/WO2012090548A1/en

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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
    • G09F9/35—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements being liquid crystals
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/133382—Heating or cooling of liquid crystal cells other than for activation, e.g. circuits or arrangements for temperature control, stabilisation or uniform distribution over the cell
    • G02F1/133385—Heating or cooling of liquid crystal cells other than for activation, e.g. circuits or arrangements for temperature control, stabilisation or uniform distribution over the cell with cooling means, e.g. fans
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K7/00—Constructional details common to different types of electric apparatus
    • H05K7/20—Modifications to facilitate cooling, ventilating, or heating
    • H05K7/20954—Modifications to facilitate cooling, ventilating, or heating for display panels
    • H05K7/20972—Forced ventilation, e.g. on heat dissipaters coupled to components

Definitions

  • the present invention relates to a display device for displaying content and an outdoor display system provided with the same.
  • Patent Document 2 a fan for generating an air flow is provided, and the air flow cools the liquid crystal panel.
  • the rotational speed of the fan may be always maximized.
  • power consumption increases.
  • a display device system provided with a solar cell for digital signage (for example, Japanese Patent Application No. 2010-147775 (filed on June 3, 2010), Japanese Patent Application No. 2010-266333 (2010 11) Application by March 30.
  • a solar cell is provided above the display device (large monitor), and the display device and the solar cell are provided.
  • further reduction in power consumption of the display device is required rather than the conventional display device (television) which receives power supply from a commercial power supply.
  • a display device includes a display panel, a display control circuit disposed on the back side of the display panel and performing display control on the display panel, and a fan generating an air flow for cooling the display panel.
  • a temperature detection unit provided on the control circuit, and a fan control circuit that controls the rotational speed or the number of driven fans according to the detection result of the temperature detection unit.
  • a display device includes a display panel, a fan for generating an air flow for cooling the display panel, an illuminance detection unit for detecting illuminance, and a detection result of the illuminance detection unit. And a fan control circuit for controlling the rotational speed or the number of driven fans of the fan.
  • a display system includes a solar cell and a display device of the above configuration driven by the power obtained by the solar cell.
  • FIG. 1 is a perspective view of an outdoor display system according to an embodiment of the present invention. It is another perspective view of the said outdoor display system. It is a side view of the said outdoor display system. It is a block diagram regarding the composition of the outdoor display system concerned. It is explanatory drawing showing the circuit arrangement in the back side of a liquid crystal panel. It is an outline view of a display concerning an embodiment of the present invention. It is sectional drawing of the said display apparatus. It is another sectional view of the display concerned.
  • FIGS. 1 to 3 are external views of an outdoor display system 9 according to an embodiment of the present invention. 1 is a front perspective view, FIG. 2 is a rear perspective view, and FIG. 3 is a side view.
  • the outdoor display system 9 has a main body case 91 in which the display device 4 and the cooling case 7 are housed.
  • the display device 4 is provided with a touch panel and an illuminance sensor.
  • a leg 92 for supporting the case 91 is provided at the lower part of the main body case 91.
  • openings 910a and 910b are provided in the lower bottom surface of the main body case 91.
  • the opening 910a is provided at a position just below the opening 11a provided at the lower part of the intake duct 11 (FIG. 6).
  • the opening 910 b is provided at a position just below the opening 11 b provided in the lower part of the exhaust duct 12 (FIG. 6).
  • 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 (FIG. 2).
  • a solar cell panel 95 for receiving sunlight is laid on the top surface of the roof 94.
  • the angle of the roof 94 is set to an angle at which sunlight efficiently enters the solar cell panel 95.
  • the display device 4 is driven using the power generated by the solar cell panel 95.
  • FIG. 4 is a block diagram showing the configuration of the outdoor display system 9. As shown to this figure, the outdoor display system 9 is provided with the solar cell 1, the storage battery 2, the controller 3, the display apparatus 4, and the inverter 8. FIG.
  • the solar cell 1 of this figure contains the solar cell panel 95 of FIG. 1 grade
  • the storage battery 2 is, for example, a lithium ion battery (battery pack).
  • the controller 3 supplies the (direct current) power generated by the solar cell 1 to the storage battery 2 and the display device 4.
  • the controller 3 basically supplies most of the power generated by the solar cell 1 to the display device 4 as it is, and stores surplus power (the difference between the power generated by the solar cell 1 and the power consumption of the display device 4) as a storage battery. Supply to 2.
  • the controller 3 causes the storage battery 2 to supply power to the display device 4 when the generated power is insufficient (for example, at night or when it rains).
  • the controller 3 is connected to an inverter 8 for converting DC power into AC power.
  • the inverter 8 converts DC power output from the controller 3 into AC power and sends it to the display device 4.
  • the reason for converting into AC power is that in the present embodiment, it is assumed that the display device 4 is driven by a commercial power source (AC power) as with many televisions currently on the market.
  • AC power commercial power source
  • this inverter 8 is unnecessary.
  • the display device 4 is a liquid crystal display device that displays information and video, and includes a receiving unit 41, an accumulation unit 42, a display control unit 43, a display panel 44, a backlight 45, a touch panel 46, a power supply circuit 47, a control unit 48, and a panel A cooling fan 49, a temperature sensor 50a, an illuminance sensor 50b, a touch panel (TP) processing circuit 52, and the like are provided.
  • the transmitting / receiving unit 41 is an external content server (for example, an ASP server, a personal computer or the like) or an antenna for receiving a signal transmitted from a broadcasting station by wireless communication (for example, a system such as WiMAX or IEEE802.11b / g); A signal processing unit that performs demodulation processing and the like on a signal received by an antenna is provided.
  • the signal to be received is advertisement content, a control signal of the outdoor display system 10 transmitted from the management company of the outdoor display system 10, surrounding weather prediction information transmitted from the weather prediction company, and the like.
  • the advertising content is, for example, a signal of the MPEG2-TS (Transport Stream) format, which is modulated and transmitted according to the OFDM (Orthogonal Frequency-Division Multiplexing) method adopted in digital broadcasting in Japan
  • the transmitting / receiving unit 35 OFDM demodulation is performed to extract an MPEG2-TS signal.
  • the extracted MPEG2-TS signal is output to the storage unit 42.
  • the transmitting and receiving unit 41 can transmit a signal to the outside by wireless communication via a transmitting antenna.
  • the signals to be transmitted are, for example, operation information of the outdoor display system 9, failure occurrence information, and the like, and such information is transmitted to a management operator or the like of the outdoor display system 9.
  • the content displayed by the display panel 44 is interactive (bidirectional) content
  • the input result of the user by the touch panel 46 is transmitted to the content server via the transmission / reception unit 41.
  • control signal of the outdoor display system 9 is transmitted to the controller 3 via the control unit 48.
  • the controller 3 controls the outdoor display system 9 using these signals and information.
  • the storage unit 42 stores the MPEG2-TS signal extracted by the transmission / reception unit 41. That is, the content transmitted from the content server or the broadcast station is stored.
  • the storage unit 42 functions as a buffer memory. If the content is content to be displayed according to the user's operation or content to be displayed based on a preset time schedule, the storage unit 42 functions as a storage medium.
  • the display control unit 43 includes a signal processing circuit 43 a that processes a signal read from the storage unit 42, and a panel control unit 43 b that performs modulation control of the display panel 44.
  • the signal processing circuit 43a decodes the content stored in the storage unit in the MPEG-TS format and converts it into a video signal.
  • the panel control circuit 43 b generates a signal for driving the display panel 44 in accordance with the video signal from the signal processing circuit 43 a. Then, the display panel 44 is driven according to the control signal from the panel control circuit 43b.
  • the signal processing circuit 43a is disposed on the same circuit board (main board) as the control unit 48, and the panel control circuit 43b is a circuit board provided near the edge portion of the liquid crystal panel (sub board Placed in).
  • the main board and the sub board are both disposed on the back side of the display panel 44.
  • the signal processing circuit 43a and the panel control unit 43b of the display control unit 43 require high-speed processing, they are realized by a dedicated hardware circuit provided separately from the control unit 48 configured by the CPU.
  • the display panel 44 is a part that displays an image, and in the display device 4, a liquid crystal display panel is used.
  • liquid crystal corresponding to each pixel of the panel is driven on / off (or in an intermediate state thereof) according to an image to be displayed.
  • the backlight 45 irradiates the display panel 44 with white light.
  • the backlight 45 uses, for example, a cold cathode tube (CCFL) or an LED light source.
  • CCFL cold cathode tube
  • the display device 4 of the present embodiment may be used off grid, and reduction in power consumption is desired. Therefore, it is preferable to use an LED light source.
  • the touch panel 46 is a transparent capacitive touch sensor disposed on the front side of the display panel 44.
  • the touch panel 46 receives an input from the user. For example, in the case where the display panel 46 displays a button image for causing the user to make a choice, when the user touches a position corresponding to the button image on the touch panel 46, it is considered that the user has made an input.
  • the power supply circuit 47 supplies power to each part of the display device 4.
  • the power supply circuit 47 converts the alternating current power (for example, 100 V, 60 Hz) into direct current (24 V, 12 V, 5 V, etc.) ) And supply power to each part of the display device 4.
  • the power supply circuit 47 supplies power to the display panel 44 and the backlight 45 as it is in FIG. Although it is described that it does, in fact, power is supplied to the other parts.
  • the control unit 48 controls each unit (the display panel 44, the touch panel 46, and the like) of the display device 4, and collects state information of each unit. In addition, each unit is controlled in accordance with the collected state information. Further, a command from the controller 3 (for example, an energy saving operation command for the display device 4) is also input to the control unit 48.
  • the control unit 48 is configured by a CPU (Central Processing Unit) or the like.
  • the panel cooling fan 49 is a fan for cooling the display panel 44 and is a generic name of the six fans of the fans 49a 1 , 49a 2 , 49a 3 , 49b 1 , 49b 2 , 49b 3 .
  • the three fans 49a 1 , 49a 2 , 49a 3 are suction fans 49a for drawing air from the outside to the inside of the display device 4, and the three fans 49b 1 , 49b 2 , 49b 3
  • the fan is an exhaust fan 49 b for exhausting air from the inside to the outside of the display device 4.
  • the temperature sensor 50a measures temperature, and is realized by, for example, a thermistor.
  • the information of the temperature detected by the temperature sensor 50a is mainly used also for the drive control of the panel cooling fan 49.
  • the illuminance sensor 50b is provided outside the front surface of the display device 4 (see FIG. 6) and detects the illuminance. Information on the illuminance detected by the illuminance sensor 50 b is transmitted to the control unit 48 and can be used to control the drive 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, or a minimum value of the detection values may be appropriately calculated, and the calculated value may be adopted as the detection value.
  • FIG. 5 shows a circuit arrangement when the display device 4 is viewed from the back side. Specifically, it is a view seen from the back side of the backlight 45 (see FIG. 7). As shown in the figure, on the back side of the backlight 45, a power supply board 60a, a main board 60b, a liquid crystal panel control board 60c, and a touch panel signal processing / control board 60d are provided. The above-described power supply circuit 47 is disposed on the power supply board 60a.
  • the control unit 48, the signal processing unit 43a, and the like described above are disposed on the main board 60b. Also, one of the temperature sensors 50a (50a 1 ) is deployed.
  • the above-mentioned panel control circuit 43b is disposed on the liquid crystal panel control board 60c.
  • the above-mentioned TP processing circuit 52 is disposed on the touch panel signal processing / control board 60d.
  • the power supply board 60 a and the main board 60 b are disposed at the center on the back side of the backlight 45.
  • the liquid crystal panel control board 60 c and the touch panel signal processing / control board 60 d are disposed on the back side and at the edge portion of the backlight 45.
  • the temperature sensor 50a in addition to the temperature sensor 50a 1 that is provided on the main board 60b, is also provided in the vicinity of the fan 49a or 49b,. Temperature sensor 50a is five minute (indicated by 50a 1 ⁇ 50a 5 in the figure, respectively) is provided. More specifically, one thermistor (50a 1 ) is provided in the main circuit 43a, and the other thermistors (50a 2 to 50a 5 ) are provided on the panel cooling fan 49 side. These thermistors are used for thermal control of the display device 4 (drive control of the panel cooling fan 49). However, detection information of a thermistor (50a 1 ) provided especially in the main circuit 43a is mainly used for the control.
  • the temperature sensor 50a may be provided in places other than the above.
  • they may be provided on the liquid crystal panel control board 60c or the touch panel signal processing / control board 60d.
  • the display panel 44 is heated by irradiation of sunlight or irradiation by the backlight 45.
  • the temperature of the liquid crystal panel becomes too high, there is a possibility that display failure (blackout) may occur due to liquefaction of the liquid crystal. Therefore, it is important to cool the liquid crystal panel 44. Further, in order to prevent the malfunction of the touch panel 46 due to the temperature change, the temperature control of the touch panel 46 is also important.
  • a cooling mechanism using the panel cooling fan 49 will be described.
  • FIG. 6 is an external view of the display device 4 (a view from diagonally front).
  • FIG. 7 is a cross-sectional view of the display device 4 when cut along a horizontal plane.
  • FIG. 8 is a cross-sectional view of the display device 4 when cut along the vertical plane including the line segment X of FIG. 7.
  • the front cabinet FC and the back cabinet BC are connected in the front-rear direction to form a substantially integrated housing.
  • An intake duct 11 is attached to the right side surface of the back cabinet BC, and an exhaust duct 12 is attached to the left side surface of the back cabinet BC.
  • FIG. 7 is a cross-sectional view of the display device 4 shown in FIG.
  • the backlight 45 is described as a plate-like member in FIG. 7, when a CCFL is used as the backlight 45, the light source portion is actually disposed on the lower surface side of the display device 4. The light is guided to the entire display panel 44 by the light guide plate (light guide).
  • the backlight 45 in FIG. 7 accurately indicates the light guide plate.
  • the backlight 45 in FIG. 7 refers to the LED light source (unit).
  • the touch panel 46 may be provided on the rear surface of the front glass 13.
  • the light of the image displayed on the display panel 44 is delivered forward via the front glass 13 and the touch panel 46. As shown in FIG. 2, since the touch panel 46 is exposed forward, an observer (passer, etc.) who is in front of the outdoor display system 9 can view the displayed content. is there.
  • an intake fan 49 a (49 a 1 , 49 a 2 , 49 a 3 ) communicates with the exhaust duct 12 in the intake port 14 communicating with the intake duct 11.
  • An exhaust fan 49 b (49 b 1 , 49 b 2 , 49 b 3 ) is provided.
  • the intake ports 14 are provided at three locations on the right side surface of the display device 4 so as to be vertically aligned (14 a, 14 b, 14 c). Further, the exhaust ports 15 are provided at three locations on the left side surface of the display device 4 so as to be vertically aligned (15a, 15b, 15c).
  • a filter may be provided in each of the intake port 14 and the exhaust port 15 to prevent rain, dust, and the like from entering the inside of the display device 4.
  • intake duct 11 is shaped to extend in the vertical direction along the side of back cabinet BC so as to cover three intake ports 14 from the outside. Furthermore, it is a mode extended downward to the body portion.
  • a duct intake port 11a opened downward is provided at the lower end of the intake duct 11. Air that has entered from the outside of the main body case 91 flows into the duct inlet 11a through the opening 91a. Since rain and dust often fall from the upper side, since the duct inlet 11a is opened not downward but downward, it is difficult for rain, dust, etc. to enter the air intake duct 11 itself.
  • An exhaust duct 12 is attached to the left side of the side surface of the display device 4.
  • the exhaust duct 12 is shaped to extend vertically along the side of the back cabinet BC so as to cover the three exhaust ports 15 from the outside.
  • a duct exhaust port 12a opened downward is provided at the lower end of the exhaust duct 12.
  • 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.
  • the duct exhaust port 12a is opened not downward but downward, it is difficult for rain, dust, etc. to enter the exhaust duct 12 itself.
  • control makes it possible to achieve both suppression of temperature rise of the display panel 44 and reduction of power consumption.
  • the touch panel 46 may malfunction due to a rapid change in temperature.
  • the control of the fan may be considered so that the change in temperature of the touch panel 46 surface becomes as small as possible. For example, instead of rapidly increasing the rotational speed of the fan, it may be increased stepwise.
  • drive control of the fan can be performed according to the output result from the illuminance sensor 50b.
  • the control of the number of driven fans can be performed as in the case of using the temperature sensor 50a.
  • a standard of the threshold when starting the driving of the fan it is set to a value (for example, 10000 lux as an example) which is assumed to exceed when exposed to direct sunlight.
  • the illuminance sensor 50b it is possible to detect that direct sunlight is applied, before the temperature rise due to this, and thus, temperature control can be performed earlier than the temperature sensor 50a. It is. That is, by increasing the cooling before the temperature rise occurs, the temperature rise can be suppressed in advance.
  • the present invention can be used for an outdoor display system or the like used outdoors.

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  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
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  • Microelectronics & Electronic Packaging (AREA)
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  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)

Abstract

A display device of the present invention is provided with: a display panel; fans, which are disposed on the rear side of the display panel, and which generate air flows for cooling the display panel; and a fan control circuit, which controls the rotation speed of the fans or the number of fans to be driven, corresponding to the results of temperature or illuminance detection.

Description

表示装置および屋外表示システムDisplay device and outdoor display system
　本発明は、コンテンツを表示する表示装置、およびこれを備えた屋外表示システムに関する。 The present invention relates to a display device for displaying content and an outdoor display system provided with the same.
　近年、平面ディスプレイ等によって映像や情報を表示する広告媒体（デジタルサイネージ）が登場している。（例えば、特許文献１）。 In recent years, advertising media (digital signage) for displaying images and information by a flat display and the like have appeared. (For example, patent document 1).
　このような広告媒体に用いられる平面ディスプレイを、屋外で使用する場合、特に太陽光の照射による熱で液晶パネルが誤動作する恐れがあるので、パネルを冷却する手段を設けることが必要である。 When the flat display used for such an advertising medium is used outdoors, there is a risk that the liquid crystal panel may malfunction due to the heat caused by the irradiation of sunlight, and it is necessary to provide a means for cooling the panel.
　例えば特許文献２では、空気流を発生する為のファンを設け、この空気流によって液晶パネルを冷却している。 For example, in Patent Document 2, a fan for generating an air flow is provided, and the air flow cools the liquid crystal panel.
特開２００９－２９４２８４号公報JP, 2009-294284, A 米国特許公開公報２００９／０１４７１７０US Patent Publication 2009/0147170
　表示パネルの温度上昇を抑えるという観点からは、ファンの回転速度を常時最大にすれば良い。しかしこの場合、消費電力が大きくなる。 From the viewpoint of suppressing the temperature rise of the display panel, the rotational speed of the fan may be always maximized. However, in this case, power consumption increases.
　一方、出願人は、太陽電池を備えた表示装置システムをデジタルサイネージ用に開発中である（例えば、特願2010-147775（2010年6月3日出願）、特願2010-266333（2010年11月30日出願）。これにより、電力系統が供給されていない場所でも表示装置の設置が可能となる。このシステムでは、表示装置（大型モニタ）の上部に太陽電池を設け、表示装置と太陽電池が一体化した構成としている。しかしながら、上記のシステムでは、商用電源から電源供給を受ける従来の表示装置（テレビ）よりも、表示装置の更なる低消費電力化が求められている。 On the other hand, the applicant is developing a display device system provided with a solar cell for digital signage (for example, Japanese Patent Application No. 2010-147775 (filed on June 3, 2010), Japanese Patent Application No. 2010-266333 (2010 11) Application by March 30. This enables installation of the display device even in places where the power system is not supplied.In this system, a solar cell is provided above the display device (large monitor), and the display device and the solar cell are provided. However, in the above system, further reduction in power consumption of the display device is required rather than the conventional display device (television) which receives power supply from a commercial power supply.
　本発明に係る表示装置は、表示パネルと、表示パネルの背面側に配置され、該表示パネルでの表示制御を行う表示制御回路と、表示パネルを冷却するための空気流を発生するファンと、制御回路上に設けられた温度検出部と、温度検出部の検出結果に応じてファンの回転速度または駆動個数を制御するファン制御回路と、を備える構成とする。 A display device according to the present invention includes a display panel, a display control circuit disposed on the back side of the display panel and performing display control on the display panel, and a fan generating an air flow for cooling the display panel. A temperature detection unit provided on the control circuit, and a fan control circuit that controls the rotational speed or the number of driven fans according to the detection result of the temperature detection unit.
　また本発明に係る別の形態の表示装置は、表示パネルと、表示パネルを冷却するための空気流を発生するファンと、照度を検出する照度検出部と、照度検出部の検出結果に応じてファンの回転速度または駆動個数を制御するファン制御回路と、を備える構成とする。 According to another aspect of the present invention, a display device includes a display panel, a fan for generating an air flow for cooling the display panel, an illuminance detection unit for detecting illuminance, and a detection result of the illuminance detection unit. And a fan control circuit for controlling the rotational speed or the number of driven fans of the fan.
　また本発明に係る表示システムは、太陽電池と、前記太陽電池により得られた電力により駆動する上記構成の表示装置を備える構成とする。 A display system according to the present invention includes a solar cell and a display device of the above configuration driven by the power obtained by the solar cell.
本発明の実施形態に係る屋外表示システムの斜視図である。1 is a perspective view of an outdoor display system according to an embodiment of the present invention. 当該屋外表示システムの別の斜視図である。It is another perspective view of the said outdoor display system. 当該屋外表示システムの側面図である。It is a side view of the said outdoor display system. 当該屋外表示システムの構成に関するブロック図である。It is a block diagram regarding the composition of the outdoor display system concerned. 液晶パネルの背面側における回路配置を表す説明図である。It is explanatory drawing showing the circuit arrangement in the back side of a liquid crystal panel. 本発明の実施形態に係る表示装置の外観図である。It is an outline view of a display concerning an embodiment of the present invention. 当該表示装置の断面図である。It is sectional drawing of the said display apparatus. 当該表示装置の別の断面図である。It is another sectional view of the display concerned.
　本発明の実施形態について、以下に説明する。 Embodiments of the present invention will be described below.
［屋外表示システムの構成］
　図１から図３は、本発明の一実施形態である屋外表示システム９の外観図である。図１は前方斜視図、図２は後方斜視図、図３は側面図である。 [Outside display system configuration]
FIGS. 1 to 3 are external views of an outdoor display system 9 according to an embodiment of the present invention. 1 is a front perspective view, FIG. 2 is a rear perspective view, and FIG. 3 is a side view.
　先ず図１を参照して、屋外表示システム９は、表示装置４や冷却ケース７などが収納された本体ケース９１を有している。表示装置４には、タッチパネルや照度センサが設けられている。 First, referring to FIG. 1, the outdoor display system 9 has a main body case 91 in which the display device 4 and the cooling case 7 are housed. The display device 4 is provided with a touch panel and an illuminance sensor.
　本体ケース９１の下部には、該ケース９１を支える為の脚部９２が設けられている。また本体ケース９１の下底面には、開口部９１０ａ、９１０ｂが設けられている。これらの開口部９１０において、本体ケース９１の内部と外部は導通しており、空気が出入りできる。開口部９１０ａは、吸気用ダクト１１（図６）の下部に設けられた開口１１ａの真下の位置に設けられている。開口部９１０ｂは、排気用ダクト１２（図６）の下部に設けられた開口１１ｂの真下の位置に設けられている。また本体ケース９１の上部には、支持部９３（図２）に支えられるようにして、屋根９４が設けられている。屋根９４の上面には、太陽光を受光する太陽電池パネル９５が敷かれている。なお屋根９４の角度は、太陽電池パネル９５へ太陽光が効率的に入射する角度に設定されている。この屋外表示システム９では、この太陽電池パネル９５により発電された電力を用いて表示装置４が駆動される。 At the lower part of the main body case 91, a leg 92 for supporting the case 91 is provided. In the lower bottom surface of the main body case 91, openings 910a and 910b are provided. At the openings 910, the inside and the outside of the main body case 91 are electrically connected, and air can enter and exit. The opening 910a is provided at a position just below the opening 11a provided at the lower part of the intake duct 11 (FIG. 6). The opening 910 b is provided at a position just below the opening 11 b provided in the lower part of the exhaust duct 12 (FIG. 6). 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 (FIG. 2). On the top surface of the roof 94, a solar cell panel 95 for receiving sunlight is laid. The angle of the roof 94 is set to an angle at which sunlight efficiently enters the solar cell panel 95. In the outdoor display system 9, the display device 4 is driven using the power generated by the solar cell panel 95.
　図４は、屋外表示システム９の構成を表すブロック図である。本図に示すように屋外表示システム９は、太陽電池１、蓄電池２、コントローラ３、表示装置４、インバータ８を備えている。 FIG. 4 is a block diagram showing the configuration of the outdoor display system 9. As shown to this figure, the outdoor display system 9 is provided with the solar cell 1, the storage battery 2, the controller 3, the display apparatus 4, and the inverter 8. FIG.
　本図の太陽電池１は、図１等の太陽電池パネル９５を含むものであり、受光した太陽光を光電変換することにより発電を行う。また蓄電池２は、例えばリチウムイオンバッテリー（バッテリーパック）である。 The solar cell 1 of this figure contains the solar cell panel 95 of FIG. 1 grade | etc., And produces electric power by photoelectrically converting the received sunlight. The storage battery 2 is, for example, a lithium ion battery (battery pack).
　コントローラ３は、太陽電池１が発電した（直流）電力を、蓄電池２および表示装置４へ供給する。なおコントローラ３は、原則的に、太陽電池１が発電した電力の大部分をそのまま表示装置４へ供給し、余剰電力（太陽電池１による発電電力と表示装置４の消費電力の差分電力）を蓄電池２へ供給する。但しコントローラ３は、発電電力の不足時（例えば夜間や雨天時）には、蓄電池２から表示装置４へ電力供給がなされるようにする。 The controller 3 supplies the (direct current) power generated by the solar cell 1 to the storage battery 2 and the display device 4. The controller 3 basically supplies most of the power generated by the solar cell 1 to the display device 4 as it is, and stores surplus power (the difference between the power generated by the solar cell 1 and the power consumption of the display device 4) as a storage battery. Supply to 2. However, the controller 3 causes the storage battery 2 to supply power to the display device 4 when the generated power is insufficient (for example, at night or when it rains).
　またコントローラ３には、直流電力を交流電力に変換するインバータ８が接続されている。インバータ８は、コントローラ３から出力される直流電力を、交流電力に変換して表示装置４に送出する。尚、交流電力に変換するのは、本実施形態では、表示装置４が、現在市販されている多くのテレビと同様、商用電源（交流電力）で駆動するものと仮定しているためである。表示装置が、直流電源により駆動するタイプである場合、このインバータ８は不要である。 Further, the controller 3 is connected to an inverter 8 for converting DC power into AC power. The inverter 8 converts DC power output from the controller 3 into AC power and sends it to the display device 4. Incidentally, the reason for converting into AC power is that in the present embodiment, it is assumed that the display device 4 is driven by a commercial power source (AC power) as with many televisions currently on the market. When the display device is of a type driven by a DC power supply, this inverter 8 is unnecessary.
　表示装置４は、情報や映像を表示する液晶表示装置であり、受信部４１、蓄積部４２、表示制御部４３、表示パネル４４、バックライト４５、タッチパネル４６、電源回路４７、制御部４８、パネル用冷却ファン４９、温度センサ５０ａ、および照度センサ５０ｂ、タッチパネル(TP)処理回路５２などを備えている。 The display device 4 is a liquid crystal display device that displays information and video, and includes a receiving unit 41, an accumulation unit 42, a display control unit 43, a display panel 44, a backlight 45, a touch panel 46, a power supply circuit 47, a control unit 48, and a panel A cooling fan 49, a temperature sensor 50a, an illuminance sensor 50b, a touch panel (TP) processing circuit 52, and the like are provided.
　送受信部４１は、外部のコンテンツサーバ（例えば、ＡＳＰサーバ、パソコンなど）、あるいは放送局から無線通信（例えば、ＷｉＭＡＸ、ＩＥＥＥ８０２．１１ｂ／ｇなどの方式）により送信される信号を受信するアンテナと、アンテナで受信した信号に対し復調処理などを行う信号処理部などを備える。ここで、受信する信号としては、広告コンテンツ、屋外表示システム１０の管理事業者から送信される屋外表示システム１０の制御信号、天気予測会社から送信される周辺の天気予測情報などである。広告コンテンツが、例えば、日本のデジタル放送で採用されているＯＦＤＭ(Orthogonal　Frequency-Division　Multiplexing)方式により変調されて伝送された、ＭＰＥＧ２－ＴＳ(Transport　Stream)形式の信号であれば、送受信部３５はＯＦＤＭ復調を行い、ＭＰＥＧ２－ＴＳ信号を抽出する。抽出されたＭＰＥＧ２－ＴＳ信号は、蓄積部４２へ出力される。 The transmitting / receiving unit 41 is an external content server (for example, an ASP server, a personal computer or the like) or an antenna for receiving a signal transmitted from a broadcasting station by wireless communication (for example, a system such as WiMAX or IEEE802.11b / g); A signal processing unit that performs demodulation processing and the like on a signal received by an antenna is provided. Here, the signal to be received is advertisement content, a control signal of the outdoor display system 10 transmitted from the management company of the outdoor display system 10, surrounding weather prediction information transmitted from the weather prediction company, and the like. If the advertising content is, for example, a signal of the MPEG2-TS (Transport Stream) format, which is modulated and transmitted according to the OFDM (Orthogonal Frequency-Division Multiplexing) method adopted in digital broadcasting in Japan, the transmitting / receiving unit 35 OFDM demodulation is performed to extract an MPEG2-TS signal. The extracted MPEG2-TS signal is output to the storage unit 42.
　また、送受信部４１は、送信アンテナを介して、外部へ信号を無線通信により送信することができる。送信する信号としては、例えば屋外表示システム９の稼動情報、故障発生情報などであり、これらの情報は、屋外表示システム９の管理事業者等に送信される。また、表示パネル４４により表示されるコンテンツが対話型（双方向）コンテンツである場合、タッチパネル４６によるユーザの入力結果が、送受信部４１を介してコンテンツサーバへ送信される。 In addition, the transmitting and receiving unit 41 can transmit a signal to the outside by wireless communication via a transmitting antenna. The signals to be transmitted are, for example, operation information of the outdoor display system 9, failure occurrence information, and the like, and such information is transmitted to a management operator or the like of the outdoor display system 9. Further, when the content displayed by the display panel 44 is interactive (bidirectional) content, the input result of the user by the touch panel 46 is transmitted to the content server via the transmission / reception unit 41.
　なお、送受信部４１が受信する信号のうち、屋外表示システム９の制御信号は、制御部４８経由でコントローラ３へ送信される。コントローラ３は、これらの信号、情報を用いて屋外表示システム９の制御を行う。 Note that among the signals received by the transmission and reception unit 41, the control signal of the outdoor display system 9 is transmitted to the controller 3 via the control unit 48. The controller 3 controls the outdoor display system 9 using these signals and information.
　蓄積部４２は、送受信部４１により抽出されたＭＰＥＧ２－ＴＳ信号を保存する。即ち、コンテンツサーバや放送局から送信されたコンテンツを保存する。コンテンツがリアルタイムコンテンツである場合（受信したコンテンツを即時に表示パネル４４で表示するような場合）、蓄積部４２は、バッファメモリとして機能する。コンテンツが、ユーザの操作に応じて表示されるコンテンツ、或いは予め設定されたタイムスケジュールに基づいて表示されるコンテンツである場合、蓄積部４２は、ストレージメディアとして機能する。 The storage unit 42 stores the MPEG2-TS signal extracted by the transmission / reception unit 41. That is, the content transmitted from the content server or the broadcast station is stored. When the content is real-time content (when the received content is immediately displayed on the display panel 44), the storage unit 42 functions as a buffer memory. If the content is content to be displayed according to the user's operation or content to be displayed based on a preset time schedule, the storage unit 42 functions as a storage medium.
　表示制御部４３は、蓄積部４２から読み出された信号を処理する信号処理回路４３ａと、表示パネル４４の変調制御を行うパネル制御部４３ｂを備える。信号処理回路４３ａは、ＭＰＥＧ－ＴＳ形式で蓄積部に蓄積されていたコンテンツをデコードして映像信号に変換する。パネル制御回路４３ｂは、信号処理回路４３ａからの映像信号に応じて、表示パネル４４を駆動する為の信号を生成する。そして、表示パネル４４は、このパネル制御回路４３ｂからの制御信号に応じて駆動される。なお、後述するように、信号処理回路４３ａは、例えば制御部４８と同じ回路基板（メインボード）に配置され、パネル制御回路４３ｂは、液晶パネルのエッジ部近傍に設けられた回路基板（サブボード）に配置される。なお、上記メインボードと、サブボードはいずれも表示パネル４４の背面側に配置されている。 The display control unit 43 includes a signal processing circuit 43 a that processes a signal read from the storage unit 42, and a panel control unit 43 b that performs modulation control of the display panel 44. The signal processing circuit 43a decodes the content stored in the storage unit in the MPEG-TS format and converts it into a video signal. The panel control circuit 43 b generates a signal for driving the display panel 44 in accordance with the video signal from the signal processing circuit 43 a. Then, the display panel 44 is driven according to the control signal from the panel control circuit 43b. As described later, for example, the signal processing circuit 43a is disposed on the same circuit board (main board) as the control unit 48, and the panel control circuit 43b is a circuit board provided near the edge portion of the liquid crystal panel (sub board Placed in). The main board and the sub board are both disposed on the back side of the display panel 44.
　なお、表示制御部４３の信号処理回路４３ａ、パネル制御部４３ｂは高速な処理を必要とするため、ＣＰＵにより構成される制御部４８とは別に設けられた専用のハードウエア回路により実現される。 Since the signal processing circuit 43a and the panel control unit 43b of the display control unit 43 require high-speed processing, they are realized by a dedicated hardware circuit provided separately from the control unit 48 configured by the CPU.
　表示パネル４４は、画像の表示を行う部分であり、この表示装置４では、液晶表示パネルが用いられている。液晶表示パネルは、表示する画像に応じてパネルの各画素に対応する液晶がオン・オフ（又はその中間状態に）駆動される。 The display panel 44 is a part that displays an image, and in the display device 4, a liquid crystal display panel is used. In the liquid crystal display panel, liquid crystal corresponding to each pixel of the panel is driven on / off (or in an intermediate state thereof) according to an image to be displayed.
　バックライト４５は、表示パネル４４に白色光を照射する。バックライト４５は、例えば冷陰極管（ＣＣＦＬ）、ＬＥＤ光源が用いられる。本実施形態の表示装置４は、オフグリッドで使用する場合があり、低消費電力化が望まれている。そのため、ＬＥＤ光源が用いられることが好ましい。 The backlight 45 irradiates the display panel 44 with white light. The backlight 45 uses, for example, a cold cathode tube (CCFL) or an LED light source. The display device 4 of the present embodiment may be used off grid, and reduction in power consumption is desired. Therefore, it is preferable to use an LED light source.
　タッチパネル４６は、表示パネル４４の前面側に配置される、透明の静電容量型のタッチセンサである。このタッチパネル４６はユーザからの入力を受け付ける。例えば、表示パネル４６が、ユーザに三択させるためのボタン画像を表示している場合、ユーザが、タッチパネル４６のボタン画像に対応する位置をタッチした場合、ユーザによる入力がなされたものとみなす。 The touch panel 46 is a transparent capacitive touch sensor disposed on the front side of the display panel 44. The touch panel 46 receives an input from the user. For example, in the case where the display panel 46 displays a button image for causing the user to make a choice, when the user touches a position corresponding to the button image on the touch panel 46, it is considered that the user has made an input.
　電源回路４７は、表示装置４の各部に対し電源供給を行う。本実施形態では、交流である商用電源から電力が供給される表示装置４を想定しているので、電源回路４７は、この交流電力（例えば、１００Ｖ、６０Ｈｚ）を直流（２４Ｖ、１２Ｖ、５Ｖ等）に変換して表示装置４の各部へ電源供給する。なお、表示パネル４４、バックライト４５における消費電力が、他の部分と比較して大きいことに鑑み、図４では、電源回路４７は、あたかも表示パネル４４、バックライト４５に対してのみ電源供給を行うごとく記述しているが、実際は、その他の各部にも電力を供給する。 The power supply circuit 47 supplies power to each part of the display device 4. In the present embodiment, it is assumed that the display device 4 to which power is supplied from a commercial power source which is an alternating current, the power supply circuit 47 converts the alternating current power (for example, 100 V, 60 Hz) into direct current (24 V, 12 V, 5 V, etc.) ) And supply power to each part of the display device 4. Note that, in view of the fact that the power consumption in the display panel 44 and the backlight 45 is larger than that in the other portions, the power supply circuit 47 supplies power to the display panel 44 and the backlight 45 as it is in FIG. Although it is described that it does, in fact, power is supplied to the other parts.
　制御部４８は、表示装置４の各部（表示パネル４４、タッチパネル４６など）に対する制御、各部の状態情報の収集を行う。また、収集した状態情報に応じて、各部の制御を行う。また、コントローラ３からの指令（例えば、表示装置４に対する省エネ運転指令）も制御部４８に入力される。制御部４８は、ＣＰＵ（Ｃｅｎｔｒａｌ　Ｐｒｏｃｅｓｓｉｎｇ　Ｕｎｉｔ）等により構成される。 The control unit 48 controls each unit (the display panel 44, the touch panel 46, and the like) of the display device 4, and collects state information of each unit. In addition, each unit is controlled in accordance with the collected state information. Further, a command from the controller 3 (for example, an energy saving operation command for the display device 4) is also input to the control unit 48. The control unit 48 is configured by a CPU (Central Processing Unit) or the like.
　パネル用冷却ファン４９は、表示パネル４４を冷却するためのファンであり、ファン４９ａ１、４９ａ２、４９ａ３、４９ｂ１、４９ｂ２、４９ｂ３の６個のファンの総称である。なおファン４９ａ１、４９ａ２、４９ａ３の３個のファンは、表示装置４の外部から内部への吸気を行うための吸気用ファン４９ａであり、４９ｂ１、４９ｂ２、４９ｂ３の３個のファンは、表示装置４の内部から外部への排気を行うための排気用ファン４９ｂである。 The panel cooling fan 49 is a fan for cooling the display panel 44 and is a generic name of the six fans of the fans 49a 1 , 49a 2 , 49a 3 , 49b 1 , 49b 2 , 49b 3 . The three fans 49a 1 , 49a 2 , 49a 3 are suction fans 49a for drawing air from the outside to the inside of the display device 4, and the three fans 49b 1 , 49b 2 , 49b 3 The fan is an exhaust fan 49 b for exhausting air from the inside to the outside of the display device 4.
　温度センサ５０ａは、温度の測定を行うものであり、例えばサーミスタで実現される。温度センサ５０ａによって検出された温度の情報は、主としてパネル用冷却ファン４９の駆動制御にも利用される。 The temperature sensor 50a measures temperature, and is realized by, for example, a thermistor. The information of the temperature detected by the temperature sensor 50a is mainly used also for the drive control of the panel cooling fan 49.
　照度センサ５０ｂは、表示装置４の前面外部（図６を参照）に設けられており、照度を検出する。照度センサ５０ｂによって検出された照度の情報は、制御部４８に伝送され、パネル用冷却ファン４９の駆動制御に利用できる。なお各種のセンサ（５０ａ、５０ｂ）は、それぞれ複数個が設けられるようにしてもよい。この場合、例えば検出値の平均値、最大値、或いは最小値などが適宜算出され、算出された値を検出値として採用してもよい。 The illuminance sensor 50b is provided outside the front surface of the display device 4 (see FIG. 6) and detects the illuminance. Information on the illuminance detected by the illuminance sensor 50 b is transmitted to the control unit 48 and can be used to control the drive 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, or a minimum value of the detection values may be appropriately calculated, and the calculated value may be adopted as the detection value.
　図５は、表示装置４を背面側から見たときの回路配置を表している。具体的には、バックライト４５の背面側から見た図である（図７参照）。本図に示すように、バックライト４５の背面側には、電源ボード６０ａ、メインボード６０ｂ、液晶パネル制御ボード６０ｃ、およびタッチパネル信号処理／制御ボード６０ｄが設けられている。電源ボード６０ａには上述の電源回路４７が配備される。 FIG. 5 shows a circuit arrangement when the display device 4 is viewed from the back side. Specifically, it is a view seen from the back side of the backlight 45 (see FIG. 7). As shown in the figure, on the back side of the backlight 45, a power supply board 60a, a main board 60b, a liquid crystal panel control board 60c, and a touch panel signal processing / control board 60d are provided. The above-described power supply circuit 47 is disposed on the power supply board 60a.
　メインボード６０ｂには、上述の制御部４８、信号処理部４３ａなどが配備される。また、温度センサ５０ａのうちの１つ（５０ａ１）が配備される。液晶パネル制御ボード６０ｃには上述のパネル制御回路４３ｂが配備される。タッチパネル信号処理／制御ボード６０ｄには、上述のＴＰ処理回路５２が配備される。なお、電源ボード６０ａ、メインボード６０ｂはバックライト４５の背面側の中央に配置されている。また液晶パネル制御ボード６０ｃ、およびタッチパネル信号処理／制御ボード６０ｄは、バックライト４５の背面側かつエッジ部分に配置されている。 The control unit 48, the signal processing unit 43a, and the like described above are disposed on the main board 60b. Also, one of the temperature sensors 50a (50a 1 ) is deployed. The above-mentioned panel control circuit 43b is disposed on the liquid crystal panel control board 60c. The above-mentioned TP processing circuit 52 is disposed on the touch panel signal processing / control board 60d. The power supply board 60 a and the main board 60 b are disposed at the center on the back side of the backlight 45. The liquid crystal panel control board 60 c and the touch panel signal processing / control board 60 d are disposed on the back side and at the edge portion of the backlight 45.
　そして温度センサ５０ａは、メインボード６０ｂ上に設けられる温度センサ５０ａ１のほか、ファン４９ａ、又は４９ｂの近傍にも設けられている。温度センサ５０ａは、５個分（それぞれを図中に５０ａ１～５０ａ５で示す）が設けられている。より具体的には、メイン回路４３ａに１個のサーミスタ（５０ａ１）が、パネル用冷却ファン４９の側にその他のサーミスタ（５０ａ２～５０ａ５）が、それぞれ設けられている。表示装置４の熱制御（パネル用冷却ファン４９の駆動制御）には、これらのサーミスタが用いられる。但し当該制御には、特にメイン回路４３ａに設けられたサーミスタ（５０ａ１）の検出情報が、主に用いられる。 The temperature sensor 50a, in addition to the temperature sensor 50a 1 that is provided on the main board 60b, is also provided in the vicinity of the fan 49a or 49b,. Temperature sensor 50a is five minute (indicated by 50a 1 ~ 50a 5 in the figure, respectively) is provided. More specifically, one thermistor (50a 1 ) is provided in the main circuit 43a, and the other thermistors (50a 2 to 50a 5 ) are provided on the panel cooling fan 49 side. These thermistors are used for thermal control of the display device 4 (drive control of the panel cooling fan 49). However, detection information of a thermistor (50a 1 ) provided especially in the main circuit 43a is mainly used for the control.
　なお本実施形態では、温度センサ５０ａは、上述の場所以外にも設けられても良い。例えば、液晶パネル制御ボード６０ｃや、タッチパネル信号処理／制御ボード６０ｄ上に設けるようにしても良い。 In the present embodiment, the temperature sensor 50a may be provided in places other than the above. For example, they may be provided on the liquid crystal panel control board 60c or the touch panel signal processing / control board 60d.
［表示装置の冷却機構について］
　表示装置４において、特に表示パネル４４は、太陽光の照射やバックライト４５による照射により熱せられる。また液晶パネルの温度が高くなり過ぎると、液晶の液化による表示障害（ブラックアウト）が生じるおそれがある。そのため、液晶パネル４４を冷却することは重要である。また温度変化によるタッチパネル４６の誤動作を防ぐため、タッチパネル４６の温度制御も重要である。以下、パネル用冷却ファン４９を利用した冷却機構について説明する。 [About the cooling mechanism of the display device]
In the display device 4, particularly, the display panel 44 is heated by irradiation of sunlight or irradiation by the backlight 45. In addition, when the temperature of the liquid crystal panel becomes too high, there is a possibility that display failure (blackout) may occur due to liquefaction of the liquid crystal. Therefore, it is important to cool the liquid crystal panel 44. Further, in order to prevent the malfunction of the touch panel 46 due to the temperature change, the temperature control of the touch panel 46 is also important. Hereinafter, a cooling mechanism using the panel cooling fan 49 will be described.
　図６は、表示装置４の外観図（斜め前方から見た図）である。また図７は、水平面で切断したときの表示装置４の断面図である。また図８は、図７の線分Ｘを含む鉛直面で切断したときの、表示装置４の断面図である。 FIG. 6 is an external view of the display device 4 (a view from diagonally front). FIG. 7 is a cross-sectional view of the display device 4 when cut along a horizontal plane. FIG. 8 is a cross-sectional view of the display device 4 when cut along the vertical plane including the line segment X of FIG. 7.
　先ず図６に示すように、表示装置４は、フロントキャビネットＦＣとバックキャビネットＢＣが前後方向に結合し、ほぼ一体的となった筐体を形成している。バックキャビネットＢＣの右側面には、吸気用ダクト１１が、バックキャビネットＢＣの左側面には排気用ダクト１２が取付けられている。 First, as shown in FIG. 6, in the display device 4, the front cabinet FC and the back cabinet BC are connected in the front-rear direction to form a substantially integrated housing. An intake duct 11 is attached to the right side surface of the back cabinet BC, and an exhaust duct 12 is attached to the left side surface of the back cabinet BC.
　また図７を参照して筺体の内部には表示パネル４４が設けられており、その後にはバックライト４５が設けられている。更にその背部には電源ボード６０ａ、メインボード６０ｂなどが配備される。またフロントキャビネットＦＣには、表示パネル４４と向い合う位置に、透明な前面ガラス１３が設けられている。前面ガラス１３の前側の表面には、タッチパネル４６が設けられている。なお、この図７は、図６で示される表示装置４を水平面１００で切断したときの断面図である。また、図７では、バックライト４５を板状の部材であるがごとく記載しているが、バックライト４５として、ＣＣＦＬを用いた場合、光源部分は実際には表示装置４の下面側に配置され、これが導光板（ライトガイド）により表示パネル４４の全体に光が導かれる。即ち、図７でいうところのバックライト４５は、正確には導光板を指す。なお、バックライト４５としてＬＥＤ光源を用いる場合、ＬＥＤ光源を表示パネル４４の真裏に配備するケースもあり、この場合、図７でいうところのバックライト４５は、ＬＥＤ光源（ユニット）を指すこととなる。尚、タッチパネル４６は前面ガラス１３の後側の表面に設けられるものであっても良い。 Further, referring to FIG. 7, a display panel 44 is provided inside the housing, and a backlight 45 is provided thereafter. Further, a power supply board 60a, a main board 60b and the like are disposed on the back of the apparatus. In the front cabinet FC, a transparent front glass 13 is provided at a position facing the display panel 44. A touch panel 46 is provided on the front surface of the front glass 13. Note that FIG. 7 is a cross-sectional view of the display device 4 shown in FIG. Further, although the backlight 45 is described as a plate-like member in FIG. 7, when a CCFL is used as the backlight 45, the light source portion is actually disposed on the lower surface side of the display device 4. The light is guided to the entire display panel 44 by the light guide plate (light guide). That is, the backlight 45 in FIG. 7 accurately indicates the light guide plate. When an LED light source is used as the backlight 45, there is also a case where the LED light source is disposed directly behind the display panel 44. In this case, the backlight 45 in FIG. 7 refers to the LED light source (unit). Become. The touch panel 46 may be provided on the rear surface of the front glass 13.
　表示パネル４４に表示された画像の光は、前面ガラス１３およびタッチパネル４６を介して前方に届けられる。なお図２に示したように、タッチパネル４６は前方に向けて露出しているため、屋外表示システム９の前方に居る観察者（通行人など）は、この表示されたコンテンツを見ることが可能である。 The light of the image displayed on the display panel 44 is delivered forward via the front glass 13 and the touch panel 46. As shown in FIG. 2, since the touch panel 46 is exposed forward, an observer (passer, etc.) who is in front of the outdoor display system 9 can view the displayed content. is there.
　表示装置４の筐体内部においては、表示パネル４４の前面と前面ガラス１３の間に空気を流すための空間ＳＰが設けられている。この空間ＳＰは、図７に示すように、吸気ダクト１１に通じる吸気口１４には、吸気用ファン４９ａ（４９ａ１、４９ａ２、４９ａ３）が、排気ダクト１２に通じる排気口１５には、排気用ファン４９ｂ（４９ｂ１、４９ｂ２、４９ｂ３）が設けられている。 Inside the housing of the display device 4, a space SP for flowing air is provided between the front surface of the display panel 44 and the front glass 13. In this space SP, as shown in FIG. 7, an intake fan 49 a (49 a 1 , 49 a 2 , 49 a 3 ) communicates with the exhaust duct 12 in the intake port 14 communicating with the intake duct 11. An exhaust fan 49 b (49 b 1 , 49 b 2 , 49 b 3 ) is provided.
　なお図８に示すように、吸気口１４は、表示装置４の右側面に、上下方向に並ぶように３箇所に設けられている（１４ａ、１４ｂ、１４ｃ）。また排気口１５は、表示装置４の左側面に、上下方向に並ぶように３箇所に設けられている（１５ａ、１５ｂ、１５ｃ）。なお図示していないが、吸気口１４や排気口１５の各々には、表示装置４の内部に雨・埃等が入らないようにするためのフィルタが設けられていても良い。 As shown in FIG. 8, the intake ports 14 are provided at three locations on the right side surface of the display device 4 so as to be vertically aligned (14 a, 14 b, 14 c). Further, the exhaust ports 15 are provided at three locations on the left side surface of the display device 4 so as to be vertically aligned (15a, 15b, 15c). Although not shown, a filter may be provided in each of the intake port 14 and the exhaust port 15 to prevent rain, dust, and the like from entering the inside of the display device 4.
　パネル用冷却ファン４９が回転することにより、空間ＳＰにおいて、吸気口１４から排気口１５へ向かう方向、すなわち図７や図８に矢印ＦＬで示す方向の送風が行われる。 As the panel cooling fan 49 rotates, air blowing in the direction from the intake port 14 to the exhaust port 15, that is, the direction indicated by the arrow FL in FIG. 7 and FIG. 8 is performed in the space SP.
　これにより、表示パネル４４と前面ガラス１３との間を含む空間ＳＰに、吸気口１４から排気口１５へ流れる空気流が発生する。その結果、この空気流が液晶パネル４４から熱を奪うことになり、液晶パネル４４を冷却できる。 Thus, an air flow from the intake port 14 to the exhaust port 15 is generated in the space SP including the space between the display panel 44 and the front glass 13. As a result, this air flow takes heat from the liquid crystal panel 44, and the liquid crystal panel 44 can be cooled.
　図８を参照して、吸気用ダクト１１は、３つの吸気口１４を外側から覆うように、バックキャビネットＢＣの側面に沿って、上下方向に伸びた形状である。更に本体部分に対して下方に延びた態様である。 Referring to FIG. 8, intake duct 11 is shaped to extend in the vertical direction along the side of back cabinet BC so as to cover three intake ports 14 from the outside. Furthermore, it is a mode extended downward to the body portion.
　また吸気用ダクト１１の下端には、下向きに開口したダクト吸気口１１ａが設けられている。ダクト吸気口１１ａには、開口部９１ａを通じて本体ケース９１の外部から入ってきた空気が流入する。なお雨や埃などは上側から落ちてくることが多いところ、ダクト吸気口１１ａは上向きではなく下向きに開口しているため、吸気用ダクト１１自体にも雨・埃等が入り難くなっている。 Further, at the lower end of the intake duct 11, a duct intake port 11a opened downward is provided. Air that has entered from the outside of the main body case 91 flows into the duct inlet 11a through the opening 91a. Since rain and dust often fall from the upper side, since the duct inlet 11a is opened not downward but downward, it is difficult for rain, dust, etc. to enter the air intake duct 11 itself.
　また表示装置４の側面のうち、左側には、排気用ダクト１２が取付けられている。排気用ダクト１２は、３つの排気口１５を外側から覆うように、バックキャビネットＢＣの側面に沿って、上下方向に伸びた形状である。 An exhaust duct 12 is attached to the left side of the side surface of the display device 4. The exhaust duct 12 is shaped to extend vertically along the side of the back cabinet BC so as to cover the three exhaust ports 15 from the outside.
　また排気用ダクト１２の下端には、下向きに開口したダクト排気口１２ａが設けられている。 Further, at the lower end of the exhaust duct 12, a duct exhaust port 12a opened downward is provided.
　ダクト排気口１２ａへ導かれた空気は、更に開口部９１ａを通じて、本体ケース９１の外部へ排出されることとなる。なおダクト排気口１２ａは上向きではなく下向きに開口しているため、排気用ダクト１２自体にも雨・埃等が入り難くなっている。 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. In addition, since the duct exhaust port 12a is opened not downward but downward, it is difficult for rain, dust, etc. to enter the exhaust duct 12 itself.
［パネル用冷却ファンの制御方法］
　表示装置４では、温度センサ５０ａ及び／又は照度センサ５０ｂからの出力結果に応じてパネル用冷却ファン４９が駆動される。 [Control method of panel cooling fan]
In the display device 4, the panel cooling fan 49 is driven in accordance with the output result from the temperature sensor 50a and / or the illumination sensor 50b.
　（第１の制御方法）
　まず、温度センサ５０ａからの出力結果に応じて、ファンの駆動制御を行う方法を説明する。例えば、温度センサ５０ａの出力結果に応じてファンの駆動個数を変える場合、温度が低い場合は、６つのファン（４９ａ、４９ｂ）を全て停止させる。温度が少し上昇し、温度Ｔ１となったとき、真ん中のファン４９ａ２、４９ｂ２のみを駆動する。温度が更に上昇し、温度２になったとき、両端のファン４９ａ１、４９ｂ１、４９ａ３、４９ｂ３を駆動し、真ん中のファン４９ａ２、４９ｂ２は停止する。そして更に温度が上昇して、温度Ｔ３となったとき、全てのファンを駆動させるような制御を行う。これに回転速度制御を組み合わせて行うようにしても良い。 (First control method)
First, a method of performing drive control of the fan according to the output result from the temperature sensor 50a will be described. For example, in the case where the number of driven fans is changed in accordance with the output result of the temperature sensor 50a, all six fans (49a, 49b) are stopped when the temperature is low. When the temperature rises a little to reach the temperature T1, only the middle fans 49a 2 and 49b 2 are driven. Temperature increases further, when it becomes a temperature 2 to drive the both ends of the fan 49a 1, 49b 1, 49a 3 , 49b 3, the fan 49a 2, 49b 2 of the middle stop. When the temperature further rises and reaches a temperature T3, control is performed to drive all the fans. This may be combined with rotational speed control.
　このような制御により、表示パネル４４の温度上昇抑制と消費電力の低減の双方を両立させることが可能となる。なお、ファンを急速に回転させた場合、温度の急激な変化でタッチパネル４６に誤動作が発生する虞がある。これを抑えるため、ファンの制御はタッチパネル４６面の温度の変化が極力小さくなるように配慮しても良い。例えば、ファンの回転速度を急激に上昇させるのではなく、段階的に上昇させるようにしても良い。 Such control makes it possible to achieve both suppression of temperature rise of the display panel 44 and reduction of power consumption. When the fan is rapidly rotated, the touch panel 46 may malfunction due to a rapid change in temperature. In order to suppress this, the control of the fan may be considered so that the change in temperature of the touch panel 46 surface becomes as small as possible. For example, instead of rapidly increasing the rotational speed of the fan, it may be increased stepwise.
　（第２の制御方法）
　また、照度センサ５０ｂからの出力結果に応じて、ファンの駆動制御を行うこともできる。ファンの駆動個数の制御は、温度センサ５０ａを利用する場合と同様に行うことができる。また、ファンの駆動を開始させるときの閾値の目安としては、直射日光が当たったときに超えると想定される値（一例としては、１００００ルクス）に設定される。 (Second control method)
Also, drive control of the fan can be performed according to the output result from the illuminance sensor 50b. The control of the number of driven fans can be performed as in the case of using the temperature sensor 50a. In addition, as a standard of the threshold when starting the driving of the fan, it is set to a value (for example, 10000 lux as an example) which is assumed to exceed when exposed to direct sunlight.
　なお照度センサ５０ｂによれば、直射日光が当たる状況となったことを、これによる温度上昇が生じる前に検出することが可能であり、ひいては、温度センサ５０ａに比べてより早期の温度制御が可能である。即ち、温度上昇が生じる前に冷却を強めることで、温度上昇を事前に抑えることができる。 According to the illuminance sensor 50b, it is possible to detect that direct sunlight is applied, before the temperature rise due to this, and thus, temperature control can be performed earlier than the temperature sensor 50a. It is. That is, by increasing the cooling before the temperature rise occurs, the temperature rise can be suppressed in advance.
　（第３の制御方法）
　また、温度センサ５０ａと照度センサ５０ｂを組み合わせた制御も考えられる。例えば、冬季に晴天である場合、直射日光が表示パネル４４に当たるのでパネル面での温度は上昇する。しかしながら、外気温が低いことに起因して温度センサ５０ａでの検出温度は低いままである。かかる場合に、温度センサ５０ａのみに基づいてファンの駆動制御を行うと、表示パネル４４の適切な冷却が行えない。 (Third control method)
Control which combined temperature sensor 50a and illumination intensity sensor 50b is also considered. For example, when the weather is fine in winter, the temperature on the panel surface rises because the direct sunlight hits the display panel 44. However, the temperature detected by the temperature sensor 50a remains low due to the low outside temperature. In such a case, if the drive control of the fan is performed based only on the temperature sensor 50a, the display panel 44 can not be properly cooled.
　一方、夏季に雨天である場合、直射日光は表示パネル４４に当たらない。しかし外気温は高いので、バックライト４５による照射ともあいまって、表示パネル４４の温度は高くなる。このような場合において、照度センサ５０ｂのみの出力に基づいてファンの駆動制御を行うのでは、表示パネル４４の適切な冷却が行えない。以上の状況に鑑み、表示装置４を屋外に常時（年中）設置する場合、温度センサ５０ａと照度センサ５０ｂとを組み合わせて、ファンの制御を行うことが好ましい。 On the other hand, when it is wet in summer, direct sunlight does not hit the display panel 44. However, since the outside air temperature is high, the temperature of the display panel 44 becomes high together with the irradiation by the backlight 45. In such a case, if the drive control of the fan is performed based on the output of only the illuminance sensor 50b, the display panel 44 can not be appropriately cooled. In view of the above situation, when the display device 4 is always installed outdoors (during the year), it is preferable to control the fan by combining the temperature sensor 50a and the illuminance sensor 50b.
　以上、本発明の実施形態について説明したが、本発明はこの内容に限定されるものではない。また本発明の実施形態は、本発明の主旨を逸脱しない限り、種々の改変を加えることが可能である。なお表示装置４の表示部の例として液晶表示パネルを例に説明したが、これに代えて、プラズマパネル、有機ＥＬ、電子ペーパー、ＣＲＴ、或いは広告フィルムなどでも良い。 As mentioned above, although embodiment of this invention was described, this invention is not limited to this content. Furthermore, various modifications can be made to the embodiment of the present invention without departing from the spirit of the present invention. Although a liquid crystal display panel has been described as an example of the display unit of the display device 4, a plasma panel, an organic EL, an electronic paper, a CRT, an advertisement film, or the like may be used instead.
　本発明は、屋外で用いられる屋外表示システムなどに利用することができる。 The present invention can be used for an outdoor display system or the like used outdoors.
　　　１　　太陽電池
　　　２　　蓄電池
　　　３　　コントローラ
　　　４　　表示装置
　　　５　　電源用冷却ファン
　　　５ａ　吸気ファン
　　　５ｂ　排気ファン
　　　６　　ファン制御装置
　　　７　　冷却ケース
　　　８　　インバータ
　　　９　　屋外表示システム
　　１１　　吸気側ダクト
　　１１ａ　ダクト吸気口
　　１２　　排気側ダクト
　　１２ａ　ダクト排気口
　　１３　　前面ガラス（透明保護部材）
　　１４　　吸気口
　　１５　　排気口
　　４１　　受信部
　　４２　　蓄積部
　　４３　　表示制御部
　　４３ａ　信号処理回路
　　４３ｂ　パネル制御回路
　　４４　　表示パネル
　　４５　　バックライト
　　４６　　タッチパネル
　　４７　　電源回路
　　４８　　制御部
　　４９　　パネル用冷却ファン
　　４９ａ　吸気ファン
　　４９ｂ　排気ファン
　　５０ａ　温度センサ
　　５０ｂ　照度センサ
　　６０ａ　電源ボード
　　６０ｂ　メインボード
　　６０ｃ　液晶パネル制御ボード
　　６０ｄ　タッチパネル信号処理／制御ボード
　　７１　　吸気口
　　７２　　排気口
　　７３　　吸気側ダクト
　　７３ａ　ダクト吸気口
　　７４　　排気側ダクト
　　７４ａ　ダクト排気口
　　９１　　本体ケース
　　９２　　脚部
　　９３　　支持部
　　９４　　屋根
　　９５　　太陽電池パネル
　　ＦＣ　　フロントキャビネット
　　ＢＣ　　バックキャビネット DESCRIPTION OF SYMBOLS 1 solar battery 2 storage battery 3 controller 4 display 5 power supply cooling fan 5a intake fan 5b exhaust fan 6 fan control device 7 cooling case 8 inverter 9 outdoor display system 11 intake side duct 11a duct intake port 12 exhaust side duct 12a duct exhaust port 13 Front glass (transparent protective member)
14 air intake port 15 exhaust port 41 receiver 42 storage section 43 display control section 43a signal processing circuit 43b panel control circuit 44 display panel 45 back light 46 touch panel 47 power supply circuit 48 control section 49 panel cooling fan 49a intake fan 49b exhaust fan 50a Temperature sensor 50b Illuminance sensor 60a Power board 60b Main board 60c LCD panel control board 60d Touch panel signal processing / control board 71 Intake port 72 Exhaust port 73 Intake side duct 73a Duct intake port 74 Exhaust side duct 74a Duct exhaust port 91 Body case 92 legs Part 93 Support part 94 Roof 95 Solar panel FC front cabinet BC Back cabinet

Claims (8)

  1. 　表示パネルと、
    　表示パネルの背面側に配置され、該表示パネルでの表示制御を行う表示制御回路と、
    　表示パネルを冷却するための空気流を発生するファンと、
    　制御回路上に設けられた温度検出部と、
    　温度検出部の検出結果に応じてファンの回転速度または駆動個数を制御するファン制御回路と、を備えることを特徴とする表示装置。     Display panel,
    A display control circuit disposed on the back side of the display panel and performing display control on the display panel;
    A fan that generates an air flow to cool the display panel,
    A temperature detection unit provided on the control circuit;
    What is claimed is: 1. A display device comprising: a fan control circuit that controls the rotational speed or the number of driven fans according to the detection result of a temperature detection unit.
  2. 　照度を検出する照度検出部を備え、
    　前記温度検出部の検出結果および前記照度検出部の検出結果に応じて、前記ファンの回転速度または駆動個数を制御することを特徴とする請求項１に記載の表示装置。     It has an illuminance detection unit that detects the illuminance,
    The display apparatus according to claim 1, wherein the rotational speed or the number of driven fans is controlled according to the detection result of the temperature detection unit and the detection result of the illuminance detection unit.
  3. 　表示パネルと、
    　表示パネルを冷却するための空気流を発生するファンと、
    　照度を検出する照度検出部と、
    　照度検出部の検出結果に応じてファンの回転速度または駆動個数を制御するファン制御回路と、を備えることを特徴とする表示装置。     Display panel,
    A fan that generates an air flow to cool the display panel,
    An illuminance detection unit that detects the illuminance;
    And a fan control circuit for controlling the rotational speed or the number of driven fans according to the detection result of the illuminance detection unit.
  4. 　前記照度検出部の検出結果が所定の閾値を超えたときに、前記ファンの回転速度または駆動個数を増大させることを特徴とする請求項３に記載の表示装置。 4. The display device according to claim 3, wherein when the detection result of the illuminance detection unit exceeds a predetermined threshold, the rotational speed or the number of driven fans of the fan is increased.
  5. 　表示パネルの前面側に配備された透明保護部材を更に備え、
    　前記ファンは、
    　表示パネルと保護部材の間に、空気流を発生させることを特徴とする、請求項１に記載の表示装置。     It further comprises a transparent protective member disposed on the front side of the display panel,
    The fan is
    The display device according to claim 1, wherein an air flow is generated between the display panel and the protection member.
  6. 　太陽電池と、
    　前記太陽電池により得られた電力により駆動する請求項１に記載の表示装置を備える表示システム。     With solar cells,
    The display system provided with the display apparatus of Claim 1 driven by the electric power obtained by the said solar cell.
  7. 　表示パネルの前面側に配備された透明保護部材を更に備え、
    　前記ファンは、
    　表示パネルと保護部材の間に、空気流を発生させることを特徴とする、請求項３に記載の表示装置。     It further comprises a transparent protective member disposed on the front side of the display panel,
    The fan is
    The display device according to claim 3, wherein an air flow is generated between the display panel and the protection member.
  8. 　太陽電池と、
    　前記太陽電池により得られた電力により駆動する請求項３に記載の表示装置を備える表示システム。     With solar cells,
    The display system provided with the display apparatus of Claim 3 driven by the electric power obtained by the said solar cell.
PCT/JP2011/068998 2010-12-28 2011-08-24 Display device and outdoor display system WO2012090548A1 (en)

Applications Claiming Priority (2)

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JP2010293376A JP2012141414A (en) 2010-12-28 2010-12-28 Display device and outdoor display system

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018197906A1 (en) * 2017-04-28 2018-11-01 Amscreen Group Limited Crossflow heat-exchangers
CN114264042A (en) * 2021-12-30 2022-04-01 珠海格力电器股份有限公司 Control method of air conditioner and air conditioner

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Publication number Priority date Publication date Assignee Title
JPH0356986A (en) * 1989-07-25 1991-03-12 Matsushita Electric Works Ltd Large video display device
JPH11344954A (en) * 1998-06-03 1999-12-14 Mitsubishi Electric Corp Plasma display device
JP2006039088A (en) * 2004-07-26 2006-02-09 Creation:Kk Outdoor information display device
JP2006163217A (en) * 2004-12-10 2006-06-22 Mitsubishi Electric Corp Outdoor display device
JP2010282109A (en) * 2009-06-08 2010-12-16 Towa Meccs Corp Display device

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0356986A (en) * 1989-07-25 1991-03-12 Matsushita Electric Works Ltd Large video display device
JPH11344954A (en) * 1998-06-03 1999-12-14 Mitsubishi Electric Corp Plasma display device
JP2006039088A (en) * 2004-07-26 2006-02-09 Creation:Kk Outdoor information display device
JP2006163217A (en) * 2004-12-10 2006-06-22 Mitsubishi Electric Corp Outdoor display device
JP2010282109A (en) * 2009-06-08 2010-12-16 Towa Meccs Corp Display device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018197906A1 (en) * 2017-04-28 2018-11-01 Amscreen Group Limited Crossflow heat-exchangers
US10905035B2 (en) 2017-04-28 2021-01-26 Amscreen Group Limited Crossflow heat-exchangers
CN114264042A (en) * 2021-12-30 2022-04-01 珠海格力电器股份有限公司 Control method of air conditioner and air conditioner

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