| 摘要 |
PROBLEM TO BE SOLVED: To provide a twisting ball display sheet which can stably keep an image even when accidental triboelectrification or dissipation of retention charges occurs after the image is written. SOLUTION: The twisting ball display sheet 10 has transparent sheets 12a, 12b having cavities 14 which are regularly formed and arranged and color balls 16 housed in the cavities 14, each having two surfaces having different optical characteristics and electrification characteristics from each other and rotatable by an electric effect. The color balls 16 are suppressed by the inner wall faces of the cavities 14 in the period except for the period of image writing, while the balls are released from the suppressed state during an image is writing.
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