To provide a line display device by which a court easy for players, a judge and audiences to understand is created and courts for a plurality of kinds of sports, a new kind of sports in particular, are created easily.
A belt-like color-developing part 1 is coated with a heat color-developable paint which is transparent or the same color as that of a floor surface in the state of a grid and arranged. A setting apparatus 3 can designate a plurality of grid lines among grid lines specified between intersections of the grid. A heater 2 is arranged along the rear surface of the belt-like color-developing part, and consists of electric heating material generating heat with energization. Based on output from the setting apparatus, the heater 2 heats the belt-like color-developing part corresponding to the designated place to make the part develop color.
| JPS60149676U | 1985-10-04 | |||
| JPS6185269U | 1986-06-04 | |||
| JPH08112395A | 1996-05-07 | |||
| JPH04504672A | 1992-08-20 | |||
| JPH0739616A | 1995-02-10 | |||
| JPS5323125A | 1978-03-03 | |||
| JPH03143467A | 1991-06-19 |
Koyama
Masayuki Mukai
Kazunori Omotani