JP3196024U - Display device - Google Patents

Abstract

Provided is a display device that enables display with power saving as required. A display device includes a power generation unit, a display unit, a storage battery, and the like. The power generation unit 13 converts natural energy into electric power to obtain natural energy electric power. The storage battery 19 stores natural energy power. The display unit 16 includes a liquid crystal display 16a and electronic paper 16b. In the display device 1, the display on the liquid crystal display 16 a can be stopped as necessary to reduce power consumption. [Selection] Figure 1

Description

  The present invention relates to a display device installed outdoors.

  In recent years, a display device that performs display by digital technology is installed outdoors and the like, thereby increasing advertisement and guidance (see Patent Document 1). Such a display device is also called digital signage.

JP 2012-16086

  A liquid crystal display or the like is used for the display device described above, and multi-color, high resolution and clear display is realized. However, such a display device has a problem of power consumption. In recent years, a solar cell or the like is often used as a power source in consideration of the environment, and in that case, the power supply is limited. Therefore, it is required to perform display with power saving as necessary.

  Patent Document 1 discloses a display system that uses a solar cell as a power source and performs display on a liquid crystal display or the like. However, as described above, display is not performed with power saving as necessary.

  The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a display device that enables display with power saving as necessary.

  The present invention for achieving the above-described object includes a power generation unit that converts natural energy into electric power to obtain natural energy power, a storage battery that stores the natural energy power, a first display, and the first display. And a display unit including a second display unit that consumes less power per unit time at the time of display than the display unit.

  The display device of the present invention uses a plurality of displays with different power consumption. If necessary, display on the display with high power consumption is stopped, and power consumption is reduced by using a display with low power consumption. Is possible. When such a necessity is not required, display using a display device with high power consumption can be performed. In addition, by using natural energy power, it is possible to display even when there is no power supply from a commercial power source, and necessary information can be transmitted even at the time of disaster or power outage.

The second display is preferably electronic paper. The first display is a liquid crystal display, for example.
Electronic paper consumes very little power during display and is suitable for display with power saving. On the other hand, by using a liquid crystal display in combination, clear display can be performed with multiple colors and high resolution.

The power generation unit preferably includes at least one of a solar power generation unit that converts sunlight into electric power and a wind power generation unit that converts wind power into electric power.
Thereby, it is possible to generate power with a relatively simple mechanism using the energy of sunlight or wind power.

It is desirable that the display device of the present invention further includes a short-range wireless communication unit that performs short-range wireless communication with other terminals.
Thereby, for example, when the user holds the terminal over the short-range wireless communication unit, various information can be provided to the terminal.

The first display and the second display may display content distributed from a server.
Thereby, the information according to the installation location and time of a display apparatus can be distributed and displayed from a server, and the transmission power of a display apparatus can be improved.

  According to the present invention, it is possible to provide a display device that enables display with power saving as required.

The figure which shows the external appearance of the display apparatus 1 The block diagram which shows the structure of the display apparatus 1 The figure which shows the display apparatus 1 and the server 2 Example of display on display unit 16 Example of display on display unit 16

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

(1. Display device 1)
FIG. 1 is a diagram showing an appearance of a display device 1 according to an embodiment of the present invention. FIG. 2 is a block diagram showing the configuration of the display device 1. In FIG. 2, the electric system of the display device 1 is indicated by a solid line, and the control system is indicated by an arrow.

  As shown in FIG. 1, the display device 1 is provided with a frame 12 on a base plate 11, and a power generation unit 13, illuminations 14 and 15, a display unit 16, a short-range wireless communication unit 18, a storage battery 19, and a control are provided on the frame 12. A portion 20 or the like is provided. The overall height of the display device 1 is, for example, about 7 m.

  The base plate 11 and the frame 12 are made of metal such as steel. However, the material is not limited to this.

  The power generation unit 13 converts natural energy into electric power by performing power generation using natural energy. Here, the electric power obtained by conversion of natural energy is referred to as natural energy electric power. Natural energy refers to energy that can be acquired from phenomena in nature in a broad sense, and includes sunlight, wind power, geothermal power, hydraulic power, and the like.

  In the present embodiment, a solar power generation unit 13 a and a wind power generation unit 13 b are provided as the power generation unit 13.

  The solar power generation unit 13a converts sunlight into electric power, and for example, a known solar cell can be used. The wind power generation unit 13b converts wind power into electric power. For example, a known wind power generation device that generates power by rotating blades with wind power can be used.

  The illumination 14 is provided in the upper part of the display device 1 and plays a role as a street lamp at night. The illumination 15 is provided above the display unit 16 and the short-range wireless communication unit 18 and is used to improve the visibility at night. As the light source for the illuminations 14 and 15, a light emitting element such as an LED (Light Emitting Diode) is used. However, it is not limited to this.

  The display unit 16 performs various displays on the display device 1. The display unit 16 includes a liquid crystal display 16a and electronic papers 16b and 16c as a display.

  In the liquid crystal display 16a (first display), for example, a liquid crystal layer is disposed between glass substrates with transparent electrodes to form a liquid crystal panel, and backlight light is transmitted through the liquid crystal panel. One glass substrate is provided with a color filter, and by changing the liquid crystal alignment direction of the liquid crystal layer according to the voltage applied from the transparent electrode, switching between transmission and non-transmission of light at each pixel position of the color filter, Display can be made.

  The electronic paper 16b (second display), 16c, for example, rotates individual particles by applying a voltage to an ink layer in which a large number of spherical particles separately painted in white and black are arranged for each hemisphere, and white or The display of black is switched. Such a display method is called a twist ball method. However, the display method is not limited to this, and electronic paper using various display methods such as an electrophoresis method can be used. In this embodiment, monochrome display with two colors of white and black is performed, but grayscale display and color display can also be performed.

  The electronic papers 16b and 16c can maintain their state with almost no power consumption after the display is switched, and the backlight is unnecessary, so the power consumption per unit time during display is about 1/10 or less of the liquid crystal display 16a. Very small.

  As will be described later, in the present embodiment, the electronic paper 16c is used for simple display of time and the like, and has a simpler configuration than the electronic paper 16b. Therefore, when comparing the electronic papers 16b and 16c, the electronic paper 16c consumes less power per unit time during display.

  The near field communication unit 18 performs near field communication with other terminals. Here, short-range wireless communication broadly refers to wireless communication performed with a terminal within a range of about 1 m using a technology such as RFID (Radio frequency identification), such as NFC (Near Field Communication). Is included.

  In the present embodiment, for example, when the user holds his / her terminal over the short-range wireless communication unit 18, various data are transmitted from the short-range wireless communication unit 18 to the terminal. This data is, for example, product information for promoting a product, URL (Uniform Resource Locator) for displaying various web pages on a terminal, but is not limited thereto. Further, various data may be received from the terminal by holding the terminal over the short-range wireless communication unit 18.

  The storage battery 19 stores the natural energy power obtained by the power generation unit 13. For example, a lead storage battery is used as the storage battery 19, but the present invention is not limited to this, and a lithium ion storage battery or the like may be used.

  The controller 20 controls display on the display device 1 and power supply. As shown in FIG. 2, the control unit 20 includes a power controller 21, a communication unit 22, a display control unit 23, and the like.

  The power controller 21 is connected to the power generation unit 13, the storage battery 19, and the commercial power supply 30. The power controller 21 supplies power from the commercial power supply 30 to the lighting 14 and 15, the display unit 16, the short-range wireless communication unit 18, the communication unit 22, the display control unit 23, and the like in normal times. Further, the natural energy power obtained by the power generation unit 13 is sent to the storage battery 19 and stored in the storage battery 19. On the other hand, when power supply from the commercial power supply 30 is interrupted during a disaster or the like, the power controller 21 supplies power using natural energy power, which will be described later.

  The communication unit 22 performs communication with an external server or the like. In the present embodiment, as shown in FIG. 3, the display device 1 and an external server 2 are connected via a wired or wireless network 3, and the content displayed on the liquid crystal display 16 a and the electronic paper 16 b is received from the server 2. be delivered.

  The display control unit 23 performs display control on the liquid crystal display 16a and the electronic paper 16b, such as displaying the content distributed from the server 2 on the liquid crystal display 16a and the electronic paper 16b.

(2. Display on display device 1)
FIG. 4 is an example of display on the display unit 16 in normal times. FIG. 4A shows an example of the liquid crystal display 16a. For example, content such as news distributed from the server 2 is displayed. FIG. 4B is an example of the electronic paper 16b. For example, contents such as weather forecasts and weather information distributed from the server 2 are displayed. However, the content displayed on the liquid crystal display 16a and the electronic paper 16b is not limited to this, and other contents such as various advertisements, guidance, and announcements distributed from the server 2 can be displayed.

  FIG. 4C shows an example of display on the electronic paper 16c. In this embodiment, simple display such as time and temperature is performed on the electronic paper 16c. The time is based on, for example, a clock provided in the electronic paper 16c or a radio signal from the base station. For example, the temperature is a value measured by a sensor (not shown) connected to the electronic paper 17. However, data such as time and temperature can be distributed from the server 2 and displayed.

  On the other hand, the display device 1 can transmit necessary information by performing display on the display unit 16 using natural energy power even when power supply from the commercial power supply 30 is interrupted, such as during a disaster.

  At this time, the power controller 21 of the display device 1 supplies the natural energy power obtained by the power generation unit 13 to the display unit 16 and the like. When sufficient natural energy power is obtained by the power generation unit 13, a part is supplied to the display unit 16 and the like, and the rest is sent to the storage battery 19 and stored in the storage battery 19. When the obtained natural energy power is not sufficient, it is supplemented by supplying the insufficient power from the storage battery 19 to the display unit 16 and the like, and stable power supply can be achieved. For example, when there is no wind at night, power is supplied mainly from the storage battery 19.

  An example of the display at this time is shown in FIG. FIG. 5A shows an example of the liquid crystal display 16a. For example, content such as disaster information distributed from the server 2 is displayed. FIG. 5B is an example of the electronic paper 16b. For example, content such as evacuation information distributed from the server 2 is displayed. However, the content displayed on the liquid crystal display 16a and the electronic paper 16b is not limited to this, and other two-dimensional recordings of a message for ensuring safety in the event of a disaster delivered from the server 2 and a URL of a safety confirmation site are recorded. It is also possible to display codes and the like. Thereby, at the time of a disaster, the display device 1 can assist in ensuring the safety of the disaster victim, and can also be used for confirming the safety of the family and preventing secondary disasters.

  Note that FIG. 5C is an example of display on the electronic paper 16c, and in the present embodiment, it is assumed that simple display of time, temperature, and the like is performed as in normal times.

  Moreover, in the display apparatus 1, when displaying on the display part 16 using natural energy electric power, it can display by power saving according to the electric energy of the storage battery 19. FIG.

  That is, the power controller 21 of the display device 1 obtains the power amount of the storage battery 19 by receiving, for example, the power amount of the storage battery 19 measured by a sensor (not shown) provided in the storage battery 19 from the sensor. Compare with a predetermined value. If the amount of power is less than or equal to a predetermined value, the power supply to the liquid crystal display 16a is cut off, the display on the liquid crystal display 16a is stopped, and natural energy power is supplied to the electronic papers 16b and 16c with low power consumption. Display. Thereby, the display device 1 can perform display with power saving. Also, necessary information can be transmitted from the display device 1 by display on the electronic paper 16b or the like.

  As described above, the liquid crystal display 16a and the electronic paper 16b having different power consumption are used in the display device 1 of the present embodiment, and the power of the storage battery 19 is small when displaying using natural energy power. For example, if necessary, the display on the liquid crystal display 16a is stopped and the electronic paper 16b is used to save power. If there is no such need, display using the liquid crystal display 16a can be performed. In addition, by using natural energy power, it is possible to perform display even when there is no power supply from the commercial power supply 30, and it is possible to transmit necessary information at the time of a disaster or power failure. Furthermore, environmental awareness can be enhanced by the display device 1 using natural energy.

  Further, the electronic paper 16b consumes very little power during display and is suitable for performing display with power saving. On the other hand, by using the liquid crystal display 16a in combination, clear display can be performed with multiple colors and high resolution.

  Furthermore, since the display device 1 includes the solar power generation unit 13a and the wind power generation unit 13b as the power generation unit 13, power generation can be performed with a relatively simple mechanism using the energy of sunlight or wind power.

  In addition, since the display device 1 includes the short-range wireless communication unit 18, when the user holds the terminal over the short-range wireless communication unit 18, various information can be provided to the terminal.

  Further, since the liquid crystal display 16a and the electronic paper 16b display the content distributed from the server 2, information according to the installation location and time of the display device 1 is distributed from the server 2 and displayed, and the transmission power of the display device 1 is displayed. Can be increased.

  However, the present invention is not limited to this. For example, in the present embodiment, power is supplied from the commercial power source 30 at normal times. However, the present invention is not limited to this, and the commercial power source 30 is omitted and display or the like is performed using natural energy power at normal times. You can also

  Moreover, although the solar power generation unit 13a and the wind power generation unit 13b are provided as the power generation unit 13 in the present embodiment, only one of them may be provided. For example, it is possible to provide only the solar power generation unit 13a. Furthermore, depending on the installation location of the display device 1, it is also possible to generate electricity using natural energy other than sunlight or wind power, such as geothermal or hydropower. However, there is an advantage that power can be generated with a relatively simple mechanism by using sunlight or wind power.

  Furthermore, although the liquid crystal display 16a and the electronic papers 16b and 16c are provided as the display unit 16 in the present embodiment, the present invention is not limited to this. For example, another display may be used instead of the liquid crystal display 16a and the electronic papers 16b and 16c, or the electronic paper 16c may be omitted and only the liquid crystal display 16a and the electronic paper 16b may be provided. Alternatively, the liquid crystal display 16a may be omitted and only the electronic papers 16b and 16c may be provided. In this case as well, as described above, it is possible to perform an operation in which display on the electronic paper 16c with relatively low power consumption is performed while the display on the electronic paper 16b with relatively high power consumption is stopped as necessary.

  As mentioned above, although preferred embodiment of this invention was described referring an accompanying drawing, this invention is not limited to this example. It will be apparent to those skilled in the art that various changes and modifications can be made within the scope of the technical idea disclosed in the present application, and these are naturally within the technical scope of the present invention. Understood.

DESCRIPTION OF SYMBOLS 1; Display apparatus 2; Server 3; Network 11; Base plate 12; Frame 13; Power generation part 13a; Solar power generation part 13b; 18; near field communication unit 19; storage battery 20; control unit 21; power controller 22; communication unit 23; display control unit 30;

Claims (6)

A power generation unit that converts natural energy into electric power to obtain natural energy power;
A storage battery for storing the natural energy power;
A display unit including a first display and a second display that consumes less power per unit time at the time of display than the first display;
A display device comprising:   The display device according to claim 1, wherein the second display is electronic paper.   The display device according to claim 1, wherein the first display is a liquid crystal display.   The said power generation part contains at least any one of the solar power generation part which converts sunlight into electric power, and the wind power generation part which converts wind power into electric power, The Claim 1 characterized by the above-mentioned. Display device.   The display device according to claim 1, further comprising a short-range wireless communication unit that performs short-range wireless communication with another terminal. The display device according to claim 1, wherein the first display and the second display display content distributed from a server.

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