| 摘要 |
PROBLEM TO BE SOLVED: To solve the problem which are heretofore in the enormous cost and the time and the difficulty, etc., in management and operation accompanying the change in the size and display contents of a signboard display. SOLUTION: The method of projecting and bulletining the display contents or instantaneously changing the contents by remote operating plural computers 3 and 3 installed with a computer 4 of a mother body at a remote place or plural projectors 2, 2, etc., for projecting the display contents on the signboards 1, 1, etc., through telephone lines, the Internet, cable televisions, radios and other lines.
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