JP2012083684A - A large display with integrated backlight and solar panel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an outdoor display device with a large-sized outdoor billboard or decorative plate irradiated from a back side for achieving energy-conservation and composing a large-sized screen.SOLUTION: A display screen comprises a plurality of strip-shaped boards 1 so as that a big screen is divided. Each strip-shaped board is made to incline forward, and a small solar panel 2 is combined with the every board. Thereby, large-sized, energy-conservation, and integration of a display device and a solar panel become possible.

Description

The present invention relates to an energy-saving advertising or decorative large display device.

  In recent years, LEDs with low power consumption, that is, light-emitting diodes, are increasingly used as illumination for outdoor advertisements, or as back-illumination light sources for photographs, pictures, or advertising panels indoors. In addition, as a social background, there is a demand for all electric products to further reduce power consumption. Based on this background, sunlight has attracted attention as an energy source other than petroleum fuel, and so-called solar panels that convert sunlight into electric energy have become widespread. Since the LED consumes much less power than ordinary incandescent bulbs and fluorescent lamps, it is extremely compatible with solar panels. For example, traffic signs, information boards, and the like that combine these are put into practical use.

  For example, a small traffic sign as shown in FIG. 4 or a combination of a large solar panel and a large signboard lighting device as shown in FIG.

  By the way, when the display device is small and power-saving as shown in FIG. 4, the power generated by the small solar panel can be stored in the battery and used for night illumination. For example, when a 40cm x 30cm display panel is illuminated at night, assuming that the photoelectric conversion efficiency of the current solar panel is about 10% to 20%, it is easy to generate electricity of about 20W, so the sunshine duration is 8 hours. Even in consideration of efficiency, power storage efficiency, etc., a system sufficient to illuminate the display panel at about 2000 Lux at night can be constructed, and the display device and the solar panel can be substantially integrated. Since such integration does not require power supply wiring or the like, it can be installed according to the application regardless of the installation location, and thus can be applied in a wide range.

  However, as shown in FIG. 5, in order to illuminate a relatively large display panel such as an outdoor signboard at night, a large-sized solar panel is required because the necessary power becomes large. For example, when illuminating a signboard with a size of 2mx1m, although it differs depending on the application, place, etc., about 150 to 200 w is required even when an LED illumination device is used. In other words, in order to enable illumination for the same length of time as daytime sunshine hours, a solar panel having the same area as the signboard to be displayed is required in combination with a battery having a sufficient capacity. Therefore, for example, when using a solar panel to obtain sufficient power to illuminate a large outdoor signboard at night, it is necessary to install the solar panel near the advertising board, either in terms of design or installation method. For example, when an advertising board is installed on the outer wall of a building, solar panels can only be installed on the rooftop of the building and connected with cables, etc. Was also very limited.

JP2009-146582 JP2010-40303

As described above, when using a solar power generation to illuminate an outdoor large display device having a size of, for example, 1 mx 2 m or more, that is, a large advertising board or a large outdoor decoration panel at night, the solar panel itself must be enlarged. It is inconvenient in terms of installation. For example, the power consumption of the LED when a 1 m long and 2 m wide display panel is illuminated from the back with sufficient brightness is about 100 w to 150 w. On the other hand, for example, the current average solar panel has a photoelectric conversion efficiency of 10% to 20%. The area of the solar panel for obtaining the above-described electric power using the average solar panel takes into consideration the light receiving efficiency and the storage efficiency. However, the area of 1mx2m which is almost the same as the display area is required.
That is, if the same area can be secured, the same lighting time at night can be secured with the power generated during daylight hours. However, for example, it is impossible to arrange a solar panel of the same area beside an outdoor signboard of 1mx2m in terms of design and construction. Therefore, if a solar panel having a smaller area than a large display panel area is used and the display panel and the solar panel can be integrated, the solar panel can be installed at any place, so that the effect is extremely great.

  In order to solve the above problems, in the present invention, the large display plate is cut into strips in the lateral direction, and each strip plate is tilted forward with an appropriate angle with respect to the vertical plane, and each strip upper plate is A small solar panel is placed at an appropriate angle with the top surface. Thus, the divided advertisement board and the dispersed solar panels are integrated to constitute a large display device having a backlight, that is, a large advertisement board or a large decorative board.

  The large display panel lighting device and solar panel can be integrated, and the installation work can be greatly simplified.

[First Embodiment]
A first embodiment of the present invention will be described with reference to FIG. In FIG. 1, a plurality of semi-transparent strip-like plates 1 that can be back-illuminated by dividing the letter “A” into three parts are arranged in parallel to the wall surface, and three letters constitute one letter. The strip-shaped plate 1 is transparent or semi-transparent such as glass or acrylic and can be illuminated from the back side. In FIG. 1, three characters constitute one character, but if it is composed of two or more strip-like plates, it complies with the gist of the present invention. Although a single plate is sufficient for the function as a display plate, it is difficult to secure a sufficient area for a solar panel in the case of a large-sized display plate, for example, 1 mx 2 m or more. Now, each strip-shaped plate 1 arranged as described above is inclined to the front side at an appropriate angle 4 with respect to the vertical plane with the lower end as a fulcrum. At this time, the angle 4 between the strip-like plate 1 and the vertical plane is optimally about 15 to 45 degrees. This is the distance, angle from the place where the display device is installed to the viewing position, or the power generation of the solar panel. Since the area ratio between the solar panel and the display surface is different from the relationship between the capacity and the power consumption of the LED lighting, the actual design is determined in consideration of all these conditions.

The solar panel 2 is disposed at an appropriate angle 6 with respect to the strip-shaped display board 1 and with a certain inclination angle in the gap between the upper surface and the vertical surface of the strip-shaped board 1. The angle 6 between the solar panel 2 and the strip-shaped plate 1 is suitably about 90 to 135 degrees, but the actual display device has the same conditions as the inclination angle 4 of the strip-shaped plate 1 described above. Determined by taking into account. The solar panel applicable to the present invention can be applied to all types of solar panels such as a crystal type, an amorphous type, a thin film type, a dye-sensitive type, and a flexible substrate type.

  In order to explain Example 1 of the present invention in more detail, the schematic cross-sectional view shown in FIG. 2 is appropriate. The display device includes a strip-shaped plate 1, a solar panel 2, an LED 3 for back lighting and a reflecting plate 5 for holding the LED and irradiating illumination light uniformly on the front surface, and these are integrated into one unit. And each unit is arranged in a staircase pattern as shown in FIG. Each unit may be independent, or may be a structure in which a plurality of units are combined and integrated. The strip-shaped plate 1 is a transparent or translucent glass or acrylic plate, on which a photograph, picture, character, or the like for advertisement or decoration is drawn or attached. In order to irradiate this from the back side, the LED 3 and the reflector 5 are arranged on the back side. At this time, so-called direct illumination in which a plurality of LEDs are directly arranged on the back surface of the plate may be used, but a structure in which a light guide plate or a reflection plate is arranged is also possible.

  As described above, when the dimensions of the display panel are assumed to be 1 m vertically and 2 m horizontally, the required area of the solar panel is approximately the same area. Therefore, for example, the amount of power generated when a solar panel with a width of 20 cm and a width of 2 m is arranged on the one strip-shaped plate can easily generate about 50 W regardless of the type of solar panel. The dimensions of the strip-shaped plate can be 30 to 50 cm in length and 2 m in width. Therefore, if this strip-shaped plate 1 and the back light 3 and the solar panel 2 are considered as one unit, by arranging them in a plurality of lengths, if the width is 2 m and the length is unlimited, and if they are also arranged in the horizontal direction, A huge screen of unlimited size can be configured.

[Second Embodiment]
A second embodiment of the present invention will be described with reference to FIG. In FIG. 3, as described in the first embodiment, the strip-shaped plate 1, the back light 3, and the solar panel 2 are considered as one unit, and when viewed from the side, a large screen is formed by arranging them in a staircase pattern. However, instead of dividing the screen into steps and arranging it on a plane as a single screen, rotate the lower end of each independent unit as a fulcrum and place the solar panel part on the wall. When stored in the direction, the display surface becomes substantially flat, and a more natural screen can be constructed at night. The unit 8 has a solar panel 2 on the top surface, a strip-shaped plate 2 as a display surface on the side surface, and an LED lighting device on the back surface of the strip-shaped plate 2, and these are housed in a box-shaped housing. However, it goes without saying that the structure is designed with attention to waterproofness and weather resistance in consideration of outdoor use. Although the forward tilt angle 4 of the display surface is mainly determined by the ratio of the length of the short side of the solar panel 2, that is, the depth of the solar panel 2 and the height of the strip-shaped plate, the angle can be freely set by increasing the distance between the units. In FIG. 3, the left sectional view shows a state in which the solar panel is operating during sunshine hours, and the right sectional view shows a state in which the unit is housed.

External view of a large display device in which the backlight and solar panel of the present invention are integrated Schematic sectional view of the first embodiment of the large-sized display device of the present invention (the AA plane in FIG. 1) Schematic sectional view of the second embodiment of the large display device of the present invention. Example of a small sign board combining a conventional small solar panel and LED display Example of a large signboard combining a conventional large solar panel and an LED lighting device

1 Strip-shaped display board 2 Solar panel 3 LED
4 Angle 5 between the strip-shaped display board 1 and the vertical installation surface 6 LED holding mechanism that also serves as a reflector and a heat sink 6 Angle between the strip-shaped display board 1 and the solar panel 2 Structure 8 that holds the display device 8 Strip-shaped display Unit 9 in which plate and solar panel are integrated Conventional LED small display device 10 for small display panel Small solar panel 11 used for small display plate Large display panel 12 having LED backlighting Power is supplied to large display plate 11 Large solar panel 13 Solar panel charge controller 14 Battery

Claims (2)

    A transparent or translucent large-sized display board for advertising or decoration in which photographs, pictures, characters, etc. of a method of illuminating with LED so-called light-emitting diodes from the back side are attached or attached to the large-sized display board In addition, each strip-shaped plate is tilted forward at an angle of about 15 to 45 degrees with respect to the vertical plane. When viewed from the front side, each plate is almost the same as a single pattern before cutting. Are arranged on a vertical plane, and on each upper surface of each of the inclined strip-shaped plates, a solar power generation panel, so-called solar panel, is arranged with respect to the plate at an angle of about 90 to 135 degrees. On the back side of the plate, LED lighting devices for illuminating the strip-shaped plate from the back side are arranged for each plate, and the strip-shaped transparent plate, LED lighting device, and solar panel are schematically shown in FIG. The advertisement of the arranged structure Ku is a decorative display device.     The strip-shaped plate according to claim 1 has a structure that rotates with the lower part of each plate as a fulcrum, and a solar panel is stored on the back side at night or in the rain without external light, and each strip-shaped plate is flat. A display device for advertisement or decoration having a structure in which the display surface is almost the same as that of a single large screen.

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