Abstract: There is provided a light-emitting display device which is resistive to shock and vibration and a display switching method comprising: a forward transparent plate 322a having a light scattering portion for a predetermined design pattern relative to a surface direction thereof, a backward transparent plate 322b having a light scattering portion for a predetermined design pattern relative to a surface direction in which the second-mentioned design pattern is different from the first-mentioned design pattern of the light scattering portion of the forward transparent plate, a light source 324 for the forward transparent plate for supplying incidence of light into the forward transparent plate from an end surface of the forward transparent plate, and an other light source 325 for the backward transparent plate for supplying incidence of light into the backward transparent plate from an end surface of the backward transparent plate, so that switching is made from and to emitting and quenching of the backward transp

Abstract: A table tennis apparatus includes a ball projecting section disposed rearward of one playing surface of a table for projecting balls towards the other playing surface, a moving mechanism for allowing ball projecting section to be moved laterally, a detecting unit for detecting which side the balls have dropped on one playing surface in the lateral direction, and a driving and controlling unit for driving the moving mechanism according to the drop positions of the balls detected by the detecting unit, and for moving the ball projecting section towards the drop positions of the balls. The moving mechanism includes a guide rail disposed along a lateral direction, and a base having the ball projecting section mounted thereon, and slidably disposed on the guide rail.

Abstract: A table tennis apparatus includes a ball projecting section disposed rearward of one playing surface of a table for projecting balls towards the other playing surface, a moving mechanism for allowing ball projecting section to be moved laterally, a detecting unit for detecting which side the balls have dropped on one playing surface in the lateral direction, and a driving and controlling unit for driving the moving mechanism according to the drop positions of the balls detected by the detecting unit, and for moving the ball projecting section towards the drop positions of the balls. The moving mechanism includes a guide rail disposed along a lateral direction, and a base having the ball projecting section mounted thereon, and slidably disposed on the guide rail.

Abstract: In a table tennis ball-sorting device, a plurality of rails are disposed side by side in substantially a horizontal direction along the side of at least one playing surface of a table tennis table at intervals that are capable of having passed therethrough only deformed balls, and a plurality of rails are disposed side by side in substantially a horizontal direction along the rear part of the playing surface at intervals that are capable of having passed therethrough only deformed balls. The former rails are disposed to be inclined towards downstream, while the downstream side thereof is overlapped on the upstream part of the latter rails so that balls can be transferred. A table tennis apparatus using the table tennis ball-sorting device is also disclosed.

Abstract: A table tennis apparatus includes a ball projecting section disposed rearward of one playing surface of a table for projecting balls towards the other playing surface, a moving mechanism for allowing ball projecting section to be moved laterally, a detecting unit for detecting which side the balls have dropped on one playing surface in the lateral direction, and a driving and controlling unit for driving the moving mechanism according to the drop positions of the balls detected by the detecting unit, and for moving the ball projecting section towards the drop positions of the balls. The moving mechanism includes a guide rail disposed along a lateral direction, and a base having the ball projecting section mounted thereon, and slidably disposed on the guide rail.