Light guide plate, display device and game machine

A light guide plate formed from a panel transparent to visible light, the light guide plate comprising:

• an input surface comprising a sidewall of the light guide plate, the input surface facing a light source that emits visible light;
• and
• a plurality of prisms arranged along one surface of the light guide plate and distributed in a predetermined pattern, each prism of the plurality of prisms comprising a reflection surface that reflects the visible light emitted from the light source, wherein
• the predetermined pattern is partitioned into a plurality of sections with each prism of the plurality of prisms arranged so that the reflection surface of each prism in a section is oriented in a same direction, and the reflection surface of each prism of the prisms in two adjacent sections is oriented in mutually different directions such that the visible light emitted from the light source and reflected from the prisms in the two adjacent sections that are separated by other than a predetermined pitch is reflected in mutually different directions.

A display device comprising:

• a light source that emits visible light;
• a light guide plate formed from a panel transparent to visible light;
• and
• a controller configured to control turning on and off of the light source;
• the light guide plate comprising:
• an input surface facing the light source and comprising a sidewall of the light guide plate;
• and
• a plurality of prisms arranged along one surface of the light guide plate and distributed in a predetermined pattern, each prism of the plurality of prisms comprising a reflection surface that reflects the visible light emitted from the light source, wherein
• each prism of the plurality of prisms is distributed so that the reflection surfaces of any two prisms separated by a predetermined pitch are oriented in a same direction, and
• the reflection surfaces of two prisms that are separated by other than the predetermined pitch are oriented in mutually different directions such that the visible light emitted from the light source and reflected from the any two prisms that are separated by other than the predetermined pitch is reflected in mutually different directions.

A game machine comprising:

• a main game unit;
• and
• a display device provided on a surface of the main game unit facing a player;
• the display device comprising:
• a light source that emits visible light;
• a light guide plate formed from a panel transparent to visible light;
• and
• a controller configured to control turning on and off of the light source;
• the light guide plate comprising:
• an input surface facing the light source and comprising a sidewall of the light guide plate;
• a plurality of prisms arranged along one surface of the light guide plate and distributed in a predetermined pattern, each prism of the plurality of prisms comprising a reflection surface that reflects the visible light emitted from the light source;
• and wherein
• each prism of the plurality of prisms is distributed so that the reflection surfaces of any two prisms separated by a predetermined pitch are oriented in a same direction, and
• the reflection surfaces of two prisms that are separated by other than the predetermined pitch are oriented in mutually different directions such that the visible light emitted from the light source and reflected from the any two prisms that are separated by other than the predetermined pitch is reflected in mutually different directions.