WEATHER DISPLAY DEVICE FOR ROAD INFORMATION
BACKGROUND OF THE INVENTION The present invention relates to an outdoor screen device mounted on the rear surface of a support column or a pole for a road guidance screen sheet, a sheet of traffic signals or the like or subject to the unused space of a support column to display, for example, weather information, road information, or news that has high public value while the contents of the screen can change in a controllable manner. To ensure the safety and uniformity of traffic, various types of screen sheets such as traffic signal sheets, guide screen sheets or the like are so far mounted not only on a highway, highway or similar, but rather also on a national road, prefecture road, a city road or the like while these can be supported by means of a support column, post or upright beam. 2. Discussion of the prior art As shown in figure 3, since the plates or screen sheets 11 and 12 such as traffic signal sheets, road guide screen sheets or the like mounted according to a letter of Road traffic for the purpose of controlling roads are arranged with display surfaces DPI and DP2 oriented opposite the direction of travel of the vehicles Cal and Ca2 on the vehicle lines Rl and R2, the rear surface 12b of the surface of the screen DPI it is kept open only as a dead space. In the event that the screen sheets 11 and 12 are mounted on beams 31 for bridge type F mounting structures within the full width of the upstream vehicle line R1 and the downstream vehicle line R2 as shown in the figure 3, the previously mentioned dead space, ie, the rear sides 11b and 12b of the screen sheets 11 and 12 for the vehicle lines Rl and R2 do not exhibit any indication, but only the structure of the beam 31 and the sides rear 11b and 12b of the screen sheet 11 or 12 are visually recognized by the drivers of the vehicles Cal and Ca2 running on the side opposite the vehicle. Thus, this is not favorable from the point of view of the show. In addition, since the gray zone is uselessly left as an extra space, this is a loss from the economic point of view. In addition, because the screen sheets 11 and 12 for the vehicle line Rl upstream and for the vehicle line R2 downstream are arranged only on the front surface or on the rear surface of the beam 31 located opposite the vehicle line Rl. or R2, the opposite surface of the beam 31 is maintained in the idle state. This is unfavorable from the point of view of the economy. SUMMARY OF THE INVENTION The present invention has been made in consideration of the aforementioned background. A primary objective of the present invention is to provide an outdoor display or display device which makes it possible to display advertisements, campaigns, public messages or the like when using the empty space on the back surface of an exhibiting sheet such as a sheet of road guide screen or similar or the side surface of it. A secondary objective of the present invention is to provide an outdoor screen device that ensures that the content of the screen can be changed arbitrarily, and in addition, the timing of the display and the deployment time can be controlled arbitrarily without any need to exchange the display or screen sheet for another, or rewrite the contents of the screen. To achieve the primary objective, according to one aspect of the present invention, an outdoor display or display device is provided which includes display or guiding guide sheets of road cartels or road signs sheets installed next to the road. road or on the road by means of support members such as a column, a post, an upright beam or the like, wherein another screen sheet having an advertisement, campaign, public message or the like displayed on it, each having an appropriate content, is attached to the back surface of the sheets of display or deployment of road guides or road signs sheets while supported by the road guide display sheet, road signs sheet or support members. Further, to achieve the secondary objective, according to another aspect of the present invention, an outdoor display or display device is provided which includes a road guidance screen sheet or a road marking sheet installed on one side of the road. the road or on the road by means of a support member such as a support column, a post, an upright beam, or the like, wherein an additional screen portion has a plurality of members that emit lights such as LEDs, miniature bulbs or the like arranged in the entire area of the latter, in the planar relation are formed on the rear surface of the road guidance screen sheet or road marking sheet or the lateral side of the latter while having a certain size, and an intermittent ignition or ignition pattern on the members emitting the lights is controlled in such a way that the characters, figures and signals are combined together to exhibit Go certain content to be displayed. It is preferable that a plurality of additional screen portions, each of which includes a plurality of flat members emitting lights, be arranged along the road, and a screen surface of each additional screen portion be connected to a Computer screen control via a line of communications, the computer controls the content of the screen. In addition, the computer is attached to one or all of the road controllers of the Japan Road Association, sections of traffic police, weather agency, several mass communication organizations, via a telephone line (s) or a (s) line (s) for exclusive use (private line). The content of the screen is information on road traffic, various kinds of news, weather forecast, official reports of governmental or public initiative, announcements of a company and a combination of the previous articles properly combined with each other. It is preferable that the deployment time be controlled by a timer. According to the present invention, when for example, a support sheet (s) is disposed at a location on, for example, a support beam from which a surface is left uselessly, the so-called dead space can be used in a manner effective, and also, the content of the screen of the advertisement sheet can be changed individually and the timing of the screen and the deployment time can be controlled. Consequently, the so-called dead space of the support beam can be profitably used, and the advertisement sheet can exhibit an excellent display effect. BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a perspective view of an outdoor deployment device of the present invention wherein the present invention is applied to a conventional display device shown in Figure 3. Figure 2 is a view in perspective of an outdoor display or display device showing by way of another example that the present invention is applied to the conventional deployment device shown in Figure 3. Figure 3 is a perspective view of the display device or display conventional, showing the state of the rear surface side of the conventional display device. Figure 4 is a perspective view of a front side showing by way of example a sheet of display or road guidance screen. Figure 5 is a perspective view of the side of the rear surface of the deployment sheet or screen shown in Figure 4. Figure 6 is a perspective view showing by way of example that the present invention is applied to the device of display or conventional screen shown in Figure 5. Figure 7 is a functional block diagram of the display device of the present invention. DESCRIPTION OF THE PREFERRED MODALITIES The present invention will now be described in detail hereinafter with reference to the accompanying drawings. Figure 1 is a perspective view showing by way of example an outdoor display or display device of the present invention wherein the present invention is applied to a conventional display device shown in Figure 3. In the figure 3, the reference characters Rl and R2 denote a vehicle line upstream and a downstream vehicle line, the reference character Cb denotes a central separation zone, the reference character Cal denotes a vehicle running on the upstream line Rl , and the reference character Ca2 denotes a vehicle running on the line R2 of vehicular travel down. Reference numerals 11 and 12 denote deployment sheets or road guidance screen from which the DP deployment surfaces are disposed opposite the travel lines Rl and R2 which extend in the directions of travel of the Cal and Ca2 vehicles. in the travel lines Rl and R2, the reference number 21 denotes the supporting columns that remain vertical on opposite sides of the road, and the reference number 31 denotes a beam member which is bridged horizontally between the upper ends of the supporting columns 21 so that a bridge-like structure F is formed by the supporting columns 21 and the beam member 31. Thus, the guide or guide screen blades 11 and 12 are fixed to the supporting member. beam 31 with the rear surfaces 11b and 12b. Incidentally, the rear surface 11b is not shown in the drawings. As shown in FIG. 3, the rear surfaces of the display or guide screen blades 11 and 12 are exposed to the weather without any display on them. The present invention has been made in consideration of the location and space that is not used in any proportion, and a characterizing feature of the present invention is that an additional screen portion 41 exemplified in Figure 1 is disposed in the beam 31. The additional screen portion 41 shown in Figure 1 is such that a number of LEDs 5, each serving as a lighting element, are arranged in the area of the entire surface area of the LB screen to present certain character, figure or similar. The content of the deployment pattern is a combination of characters and figures to be published by the partner government organization, information on the road guidance screen, road traffic information on the opposite lines of vehicle travel, various types of news and weather forecast. The characters and figures are used in the appropriately combined or independently state to express an article that is to be published among them. In the present invention, an advertisement display plate or sheet 41 is attached to the side of the rear surface 12b of the display or screen sheet 12 for the downstream travel line R2 and a deployment sheet 41 'of a writing by hand or photographic advertisement is arranged on the side of the upstream travel line Rl while the display surface DP is oriented towards the running carts as exemplified in figure 3. Figures 4 to 6 are drawings which show by way of another example the structure of a deployment device of the present invention. In Figure 4, the reference numeral 22 denotes a support column, the reference numeral 23 denotes an arm member that is made integral with the support column 22 by bending a part of the support column 22. As shown in Figure 5, only the skeleton 13S of the display or screen sheet 13 is recognized * on the rear surface 13b of the display or screen sheet 13. To carry out the present invention, a table or board 5a is attached to the rear surface 13b to allow a number of LEDs 5 to be arranged on it regularly. To express the desired characters on the 5a board with LEDs, the latter are switched on or off intermittently with the help of a computer. With this construction, the side of the rear surface 13b of the display or screen sheet 13 that is not usefully used as a dead space of the conventional display or display device, can be used effectively as a space for a variable screen sheet that It is electrically illuminated for the purpose of guiding roads or similar. Because the additional screen portions 41 and 42 are attached to the existing road guide sheets or display or screen sheets arranged on a main road or highway, a number of additional screen portions are arranged in the separate relationship along the side of the road. Because the intermittent ignition or firing of the LEDs in each space in each board or screen board LB is controlled "based on the total, with the help of a control system as exemplified in FIG. 7, the system will be described later in Figure 7, the reference numbers 61 to 64 denote sources of information to provide traffic information, various types of news, weather forecast or the like. 64 are highway drivers in the Japanese Road Association, government associations, local government associations, weather agencies, weather information provided by companies, newspaper companies, television stations, or similar information provided by organizations. reference 65 denotes a deployment control center or screen to fully control the operations of deploying portions of the and additional screen 41 to 4n in response to information from information sources 61 to 64. Control center 65 is connected to respective screen portions 41 to 4n via communication circuits 66c with modems, 66a and 66b interposed between these. Not only a telephone line, but also an exclusive telephone line and a fiber optic communication line are used for the 66c communication circuits. In addition, a telephone line or facsimile line 67 can be connected to the control center 65 to allow the screen information given by the companies and persons to be received directly in the control center 65. The deployment control center 65 it allows the traffic information, news or weather forecast to be displayed separately in each of the screen portions 41 to 4n or to be displayed in the screen portions 41 to 4n in union while the content of the screen is changed. In addition, since the content of the screen varies depending on the time of deployment of the traffic guide, news, announcements or the like, causing the content of the screen to be easily changed, the deployment control center 65 exhibits a high efficiency as a means of deployment. Further, with respect to each of the screen portions 41 to 4n, a deployment timing or a deployment time can be freely set or changed with the aid of a built-in timer in the computer of the deployment control center 65. As it is evident from the above description, since a display surface BL of each of the additional screen portions 41 to 4n, which are illuminated to allow a required screen content to be relegated in that way can be visually recognized only by a driver and by the passengers in their vehicle running along the opposite route of travel, there is no disturbance that the traffic screen on the side of the route of travel opposite the front side of a plate or screen plate can not be affected or a vehicle running on the side of the previous route can not be driven. Therefore, the additional screen portions 41 through 4n do not obstruct the vehicle from being driven in the same manner as with other billboards in a city. While the present invention has been described above with respect to a few modalities thereofIt should be understood, of course, that the present invention is not limited to these embodiments but that various changes or modifications may be made without departing from the scope of the present invention as defined by the appended claims.