Patent ID: 11966064
Assignee: OMRON CORPORATION
Field: Optics (Instruments)
Classification: CPC G | IPC F  G

Claim 0:
1. A light guide plate device, comprising:
an incident surface configured to receive light from a light source; and
an optical path changer at a predetermined position on a back surface perpendicular to the incident surface, the optical path changer being configured to reflect light incident through the incident surface and guided to be emitted through an emission surface parallel to the back surface, wherein
the light emitted through the emission surface forms a formed image comprising a plane image representing a surface, and the plane image comprises an image of a continuous surface comprising a near imaging portion at an imaging position within a predetermined distance from the back surface and a distant imaging portion at an imaging position more distant than the predetermined distance from the back surface,
the predetermined distance is set to reduce contrast deterioration and blurring in the formed image at the near imaging portion and the distant imaging portion, and
the plane image has two ends comprised in the near imaging portion in a cross section perpendicular to the back surface and an optical axis of the light source.