To provide a line display device reducing the amount of change between an apparent line position and a true line position.
An electricity fed display device 10 is mounted on a floor material 5, stored in a transparent polycarbonate protection member 8, which is formed with a recess part M larger than the thickness K of the electricity fed display device 10, in such a manner as being covered with the protection member 8, and fitted in a groove in the floor material 5. Because the depth M of the recess part of the protection member 8 is deeper than the thickness K of the electricity fed display device 10, when a strong treading force is applied to the protection member 8 by a movement such that a player jumps on a line as a part of the floor, the treading force is transmitted to the floor material 5 in contact with the both ends of the recess part and none is transmitted to the electricity fed display device 10. Therefore, even if the protection member 8 is bent or strained, the strain can be absorbed by the protection member 8 alone so that no load is transmitted to the electricity fed display device 10. There is no possibility that the electricity fed display device 10 is broken by the treading force.
ANDO YOSHIMI
KATO YASUHISA
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