JP2012195742A - Display terminal device and display system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a display terminal device which facilitates installation or removal by acquiring display data from a management device by wireless communication, and using power generated by a solar cell thereby eliminating the need for the wiring work, and reduces the cost when displaying at all times, and to provide a display system using the display terminal device.SOLUTION: The display terminal device comprises: a solar cell 103; a power supply control unit 105 which generates power supply power from the electromotive force of the solar cell 103; a wireless communication unit 102 which receives display information by external wireless communication; an image display unit 108 which displays the display information received by the wireless communication unit 102 under control of an image display control unit 107; and an operation control unit 106 which suppresses consumption of the power supply power by controlling the image display control unit 107 and the image display unit 108.

Description

  The present invention relates to a display terminal device that receives data sent from a management device and displays information such as an image in accordance with the data, and a display system using the display terminal device.

For example, in facilities such as railway stations and airports, a plurality of display terminal devices that provide information to passengers are installed, and display data related to display contents is transmitted from a management device or the like connected to these devices, and each destination is sent. Each information corresponding to the passenger heading to is displayed.
In this way, display terminal devices that are installed in areas such as facilities and display information are equipped with a power source such as a battery in each device, or a power cable is laid on each device to acquire power supply power. .

A display terminal device that displays information using data sent from a management device, a distribution server, or the like is supplied with power from a UPS, such as a program display terminal described in Japanese Unexamined Patent Application Publication No. 2009-201011. A download schedule is set for the program display terminal, the UPS is turned on according to the schedule, the program display terminal is operated, and the program file distributed from the advertisement management / distribution server is downloaded. Is displayed, and the UPS is turned off according to the above schedule to stop the operation of the program display terminal.
A conventional display terminal device that operates by laying a power supply cable, for example, performs complex control so as to operate within a certain period of time as described above, for example, to save power. When the operation is performed, the power consumption is considerably increased.

JP 2009-201011 A

Conventional display terminal devices equipped with a battery are limited in display time due to the capacity of the battery, so are not suitable for use in which display is always performed, and maintenance is also required at regular intervals such as battery replacement. Become. In addition, when displaying advertisements or signs that increase power consumption during operation on a large screen in relation to the above limitation of display time, a large-capacity battery is required, and such display is performed. Sometimes using a battery is unsuitable.
In addition, a space for mounting a battery on the display terminal device is required, and there is a problem that the display terminal device increases in size and weight.

Since the display terminal device that acquires the power supply power using the power supply cable consumes a large amount of power as described above, the power cost increases when performing a constant display.
In addition, depending on the size of the facility where the display terminal device is installed, considerable time and cost are required for laying and removing the power supply cable. In particular, when a display terminal device is used in a facility with a limited installation period, work to move the display terminal device frequently occurs, and additional work costs are required to install and remove the device and power supply cable. As a result, the total cost for using the display terminal device is high.

  In order to solve the problems as described above, the present invention obtains display data from a management device by wireless communication, and uses power generated by a solar cell, so that installation and removal can be performed without the need for wiring work. It is an object of the present invention to provide a display terminal device that can be easily performed and that reduces the cost when performing constant display and a display system using the display terminal device.

  In order to solve the above problems, a display terminal device of the present invention includes a solar cell, a power control unit that generates power from the electromotive force of the solar cell, and a wireless communication unit that receives display information through wireless communication with the outside. A display unit that displays display information received by the wireless communication unit; and an operation control unit that controls the wireless communication unit and the display unit to suppress the power consumption. To do.

  In addition, a capacitor for storing the electromotive force of the solar cell is further provided, and the power supply control unit supplements power supply power supplied to the wireless communication unit and the display unit by using the power stored in the capacitor. And

  The display information includes image data, and the display unit performs image display using the image data.

  The display information includes audio data, and the display unit performs audio display using the audio data.

  In addition, a display system according to the present invention includes the display terminal device described above and a management device that transmits display information to the display terminal device through wireless communication.

  In addition, the information processing apparatus further includes an information generation device that generates display information in accordance with an operation performed by the user and transmits the display information to the management device.

According to the present invention, since the display terminal device can be installed without the need for laying communication wiring and power supply wiring, the cost required for installing and removing the display terminal device can be suppressed.
In addition, since the electromotive force of the solar cell is used as the power source power of the display terminal device, maintenance during the operation period is unnecessary, and it is not necessary to purchase power from a power line, etc. Costs for displaying can be reduced.

It is a schematic block diagram of the display system using the display terminal device of this invention. It is a schematic block diagram of the display terminal device of this invention. It is explanatory drawing which shows the external appearance of the display terminal device of this invention.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 is a schematic configuration diagram of a display system using the display terminal device of the present invention. This figure shows a configuration of a display system in which a plurality of display terminal devices 10 according to the present invention are installed and operated in a facility such as a vicinity of a ticket gate of a station or a boarding gate of an airport. In such a facility, the display terminal devices 10 are installed so as to be separated from each other. For example, guidance information for each boarding gate is displayed on each device.

  1 includes a management device 20 that transmits display data and the like to the display terminal device 10 by wireless communication, and an information generation device 30 that generates information to be displayed on each display terminal device 10. In this display system, each display terminal device 10 and the management device 20 are arranged apart from each other, and each display terminal device 10 and the management device 20 are not connected by wiring such as a cable. In addition, no wiring connection is made between the display terminal devices 10.

  The management device 20 is connected to the information generation device 30, and converts the data input from the information generation device 30 into a data format that can be processed by the own device or the display terminal device 10. A communication control unit 202 that performs operation control for transmitting the output data to the display terminal device 10, a wireless communication unit 203 that generates a wireless signal according to the control of the communication control unit 202, and performs wireless communication with the outside, And the antenna 204 which transmits the radio signal output from the radio | wireless communication part 203 is provided.

FIG. 2 is a schematic configuration diagram of the display terminal device of the present invention. This figure is a block diagram showing each part constituting the display terminal device 10.
The display terminal device 10 includes an antenna 101 used for wireless communication with the management device 20 in FIG. 1, a wireless communication unit 102 that performs wireless communication using the antenna 101, and a solar cell 103 that is externally mounted on the display terminal device 10 as described later. , A capacitor 104 that supplements the power source power, and a power source control unit 105 that supplies the power source power to each unit of the display terminal device 10 using the power acquired from the solar cell 103.

  In addition, the display terminal device 10 controls the operation of each unit to suppress power consumption of each unit and the image for performing control for performing image display based on the wireless signal received by the wireless communication unit 102. A display control unit 107 and an image display unit 108 that displays an image according to the control of the image display control unit 107 are provided.

FIG. 3 is an explanatory view showing the appearance of the display terminal device of the present invention. This figure shows an arrangement configuration example of the solar cell 103 that is externally mounted on the display terminal device 10.
The display terminal device 10 in FIG. 3A is a configuration example in which the solar cell 103 is disposed below the display screen of the image display unit 108. The casing of the display terminal device 10 is formed so that the lower end of the casing protrudes forward of the display screen of the image display unit 108. The solar cell 103 is arranged at the lower end of the casing. The light receiving surface is directed obliquely upward. In addition, when the housing is provided with the solar cell 103 in this manner, the orientation of the light receiving surface may be variable.

  The display terminal device 10 in FIG. 3B is a configuration example in which solar cells 103 are arranged on the display screen side of the image display unit 108 and on the back side (not shown) of the display screen. The casing of the display terminal device 10 is formed such that the side surface of the casing expands downward from a portion serving as the lower end of the image display unit 108. On the front side of the image display unit 108, The image display unit 108 is formed to protrude forward, and on the back side of the image display unit 108, the lower end of the housing is formed to protrude rearward from the image display unit 108.

  By disposing the solar cell 103 at the lower end of the casing as described above, the solar cell 103 disposed on the front side of the image display unit 108 has a light receiving surface obliquely above the display screen of the image display unit 108. The solar cell 103 arranged on the back side of the image display unit 108 (not shown) is installed so that its light receiving surface faces obliquely above the back surface of the image display unit 108. Note that, similarly to the above-described display terminal device 10 shown in FIG. 3A, the direction of the light receiving surface of the solar cell 103 can be varied also in the display terminal device 10 shown in FIG. You may comprise as follows.

The display terminal device 10 in FIG. 3C is a configuration example in which solar cells 103 are arranged on both sides of the display screen of the image display unit 108. The two solar cells 103 are both installed with the light receiving surface facing the front of the display screen of the image display unit 108.
As described above, each of the devices shown in FIGS. 3B and 3C includes two solar cells 103 to generate more photoexcitation current.

Next, the operation will be described.
In the display system shown in FIG. 1, when the information generating device 30 is, for example, a ticket issuing device or the like, when the user operates this device to issue a ticket, the information generating device 30 sends the information to the user after issuing the ticket. As a service to be provided, for example, information such as train and passenger boarding information is output to the management device 20.
When the information provided to the user from the information generation device 30 is input to the interface unit 201 of the management device 20, the information is converted into, for example, image data in a predetermined format. The format of this image data can be processed by the display terminal device 10.

  The communication control unit 202 of the management apparatus 20 outputs the image data generated by the conversion process of the interface unit 201 to the wireless communication unit 203. Further, for example, a code or the like included in the information sent from the information generating device 30 is extracted, and the display terminal device 10 that is the transmission destination of the image data is recognized. Next, transmission data is generated by associating, for example, the above-described code and the transmission target image data indicating the recognized display terminal device 10, and is output to the wireless communication unit 203.

When the transmission data is input from the communication control unit 202, the wireless communication unit 203 of the management apparatus 20 outputs a wireless signal having the transmission data as transmission contents in accordance with the control of the communication control unit 202. Specifically, a radio signal that includes image data to be transmitted to the display terminal device 10 that is the transmission destination, is added with a code indicating the display terminal device 10 that is the transmission destination, and is received only by the display terminal device 10 that is the transmission destination. Generate. This wireless signal is transmitted using the antenna 204.
In this way, the management device 20 identifies the display terminal device 10 that is the transmission destination specified by the information sent from the information generation device 30. Further, the image data generated from this information is transmitted as a radio signal together with a code representing the transmission destination to the display terminal device 10 of the designated transmission destination. Therefore, in a display system including a plurality of display terminal devices 10, different images can be displayed on each display terminal device 10, and the same image can also be displayed on each device.

The display terminal device 10 includes the solar cell 103 as illustrated in FIGS. 2 and 3 and operates using the electric power generated by the solar cell 103. The solar cell 103 generates a photoexcitation current of at least 10 to 20 mA by indoor illumination light such as a fluorescent lamp.
When a photoexcitation current flows from the solar cell 103, the power supply control unit 105 of the display terminal device 10 generates a stabilized voltage and current using the electromotive force of the solar cell 103 and stores the voltage in the capacitor 104. At this time, the current supplied to the capacitor 104 is sufficiently smaller than the charging current of a general battery for electronic equipment.

When the capacitor 104 has accumulated a predetermined amount of charge, the power control unit 105 supplies power to the wireless communication unit 102, the image display control unit 107, the image display unit 108, and the like via the operation control unit 106.
The capacitor 104 discharges the electric power stored by itself according to the control of the power supply control unit 105 when the consumption current fluctuates depending on the operation state of each unit, and supplements the power supplied to each unit by this discharge current. It has a capacity that can prevent a drop in power supply voltage. The capacitor 104 of the display terminal device 10 described in this embodiment includes the electromotive force performance of the solar cell 103, the wireless communication unit 102, the power supply control unit 105, the operation control unit 106, the image display control unit 107, and the image display unit. Corresponding to power consumption such as 108, for example, a capacity of at least about 10 [F] is provided.

The operation control unit 106 includes a processor such as a CPU and a memory storing a program used for the processing operation of the processor, and these devices or circuits are configured to suppress power consumption.
In this way, the operation control unit 106 operates while suppressing its own power consumption, and the operation of each of these units so as to suppress the power consumption in the wireless communication unit 102, the image display control unit 107, the image display unit 108, and the like. To control.

The wireless communication unit 102 performs, for example, wireless communication conforming to the ZigBee (registered trademark) standard or specific low-power wireless communication with the management device 20.
When the wireless communication unit 102 receives a wireless signal from the management apparatus 20 using the antenna 101, the wireless communication unit 102 extracts a code indicating a transmission destination and image data included in the wireless signal.
The operation control unit 106 acquires a code indicating the transmission destination from the wireless communication unit 102 and determines whether the wireless signal is to be received by the operation control unit 106. If it is determined that the signal is not to be received, no processing operation is performed. If it is determined that the signal is to be received, the image data included in the wireless signal is converted into the image display control unit 107. Output to.

  Here, when it is determined that the received radio signal should be received by itself, a signal indicating that the radio signal from the management apparatus 20 has been normally received is transmitted to the management apparatus 20 using the radio communication unit 102. You may make it do. As described above, by returning a signal indicating normal reception to the management apparatus 20, it is possible to accurately recognize what each display terminal apparatus 10 displays in the management apparatus 20.

  The operation control unit 106 suppresses power supply power supplied to the wireless communication unit 102 to a minimum during a period in which no wireless signal is received. In other words, the minimum power necessary for receiving the radio signal is supplied to the radio communication unit 102 so that the presence or absence of reception can be detected. As described above, if no wireless signal is received after image data is extracted, the operation of the wireless communication unit 102 is reduced to the minimum to reduce power consumption.

  The operation control unit 106 suppresses or cuts off power supplied to the image display control unit 107 until the image data acquired from the wireless communication unit 102 is output to the image display control unit 107. Further, until the image display control unit 107 displays an image on the image display unit 108, the power source power supplied to the image display unit 108 is suppressed or cut off.

  The image display control unit 107 that has input the image data receives the image data input via the operation control unit 106 when the power supply necessary for the processing of the image data is supplied under the control of the operation control unit 106. Processing is started, and control for displaying an image on the image display unit 108 is started. Specifically, for example, the image display unit 108 is instructed about the shape of characters, figures, and the like indicated by the image data, and the color, etc., and the image indicated by the image data is displayed.

The image display unit 108 is a display device with low power consumption such as electronic paper, and is configured to maintain a display image even after power supply is cut off.
The operation control unit 106 outputs the image data received by the wireless communication unit 102 to the image display control unit 107, and until the image based on this image data is displayed on the image display unit 108, Supply power.
The operation control unit 106 supplies power to the image display unit 108 until the image display control unit 107 controls the image display unit 108 and an image is formed on the display screen of the image display unit 108. To do. During other periods, the supply of power is suppressed or cut off.

As described above, the image display unit 108 maintains the image that has been displayed so far even after the power is turned off, and a radio signal indicating an image to be newly displayed from the outside of the display terminal device 10 is received. Unless it is sent, the current image is displayed continuously. The display image of the image display unit 108 is updated when a wireless signal including new image data or the like is transmitted from the management device 20.
As described above, the image display unit 108 maintains the display image even when the power supply is not supplied. Therefore, the wireless signal indicating that the display is erased is transmitted from the management device 20 to the desired display terminal device 10. The display image of the display terminal device 10 may be erased.

Since the display terminal device 10 is configured to generate the power source power by the solar cell 103 and to acquire the image data to be displayed by a wireless signal with the outside, the wiring connection used for the power source and the data communication is reduced. It is unnecessary and can reduce the cost required for installation and removal.
Moreover, since the solar cell 103 is used for a power supply, the maintenance regarding a power supply is unnecessary and the maintenance cost within the period to operate can be suppressed.
In addition, the image display unit 108 that maintains the displayed image even after the power is turned off is provided, the electromotive force of the solar cell 103 is stored, and the electromotive force of the solar cell 103 is compensated according to the power consumption. Since the capacitor for stabilizing the power supply voltage of the display terminal device 10 is provided, the cost for performing the constant display can be suppressed.

  The display terminal device 10 described here is an example configured to display a still image. The display terminal device 10 includes a display device that can be operated by the electromotive force of the solar cell 103 as the image display unit 108. A moving image can be displayed by including the wireless communication unit 102 that operates with the electromotive force of the battery 103 and can receive a wireless signal including moving image data.

Although the display terminal device 10 of this embodiment is configured to display an image, the display terminal device according to the present invention has the same operation even when configured to display information other than an image. An effect is obtained.
For example, the image display unit 108 shown in FIG. 2 is replaced with an audio display (playback) unit, and the image display control unit 107 is replaced with an audio output control unit that D / A converts audio data and generates an audio signal. Thus, a desired display terminal device can be made to display an arbitrary sound.
Further, the same operation and effect can be obtained even in a display terminal device configured to perform image and sound in synchronization as display operations.

DESCRIPTION OF SYMBOLS 10 Display terminal apparatus 20 Management apparatus 30 Information generation apparatus 101 Antenna 102 Wireless communication part 103 Solar cell 104 Capacitor 105 Power supply control part 106 Operation control part 107 Image display control part 108 Image display part 201 Interface part 202 Communication control part 203 Wireless communication Part 204 antenna

Claims (6)

Solar cells,
A power supply controller that generates power from the electromotive force of the solar cell;
A wireless communication unit that receives display information by wireless communication with the outside;
A display unit for displaying display information received by the wireless communication unit;
An operation control unit that controls the wireless communication unit and the display unit to suppress the power consumption;
A display terminal device comprising: Further comprising a capacitor for storing the electromotive force of the solar cell,
The display terminal apparatus according to claim 1, wherein the power supply control unit supplements power supply power supplied to the wireless communication unit and the display unit using power stored in the capacitor. The display information includes image data,
The display terminal device according to claim 1, wherein the display unit displays an image using the image data. The display information includes audio data,
The display terminal device according to claim 1, wherein the display unit performs voice display using the voice data. A display terminal device according to any one of claims 1 to 4,
A management device for transmitting display information to the display terminal device by wireless communication;
A display system characterized by comprising:   The display system according to claim 5, further comprising: an information generation device that generates display information in accordance with an operation performed by a user and transmits the display information to the management device.

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