| 摘要 |
PROBLEM TO BE SOLVED: To provide an enlarged display structure enabling a driver to view an enlarged image of an instrument by a Fresnel lens without being influenced by reflected light of external light.SOLUTION: A circularly polarizing plate 106 is stuck on the front side (driver 112 side) of the Fresnel lens 107. The Fresnel lens 107 is a lens divided in a concentric domain with a reduced thickness, has a notched saw-shaped surface, and is fixed between front glass and a dial plate of the instrument. External light 116 passes the circularly polarizing plate 106, and is reflected by the notched saw-shaped surface of the Fresnel lens 107, and reflects the reflected light 117 by the circularly polarizing plate 106. Since the circularly polarizing plate 106 does not allow the passage of the reflected light 117, the driver 112 is not influenced by the reflected light. Illumination light 118 passes the Fresnel lens 107, and passes the circularly polarizing plate 106 without being blocked by the circularly polarizing plate 106, and then enters eyes of the driver 112. |
