| 摘要 |
A multiplicity of modules is arranged to display a message, each module displaying one selected character that forms part of the message. Each module includes a strip of flexible material on which the characters that can be displayed are arranged in a series. The strip is wound from one spool to another under the power of a motor causing the characters to move successively through a viewing area. A strip-position-indicator presents a value of electrical resistance that corresponds, according to a predetermined code, to the position of the strip. If the resistance presented by the strip-position-indicator does not correspond to the character called for by a control means, a motor actuator causes the strip to be wound in the appropriate direction until that character is reached.
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