Patent ID: 11966050
Assignee: NITTO DENKO CORPORATION
Field: Optics (Instruments)
Classification: CPC G  B  C | IPC B  C  G

Claim 0:
1. A head-up display apparatus, comprising:
a display unit configured to output projection light;
at least one reflector configured to reflect the projection light;
a housing, which has an opening portion, and is configured to store the display unit and the reflector therein;
a cover member configured to cover the opening portion; and
a polarizing plate with a retardation layer, which is arranged on a housing inner side of the cover member, and includes a retardation layer and a polarizer in the stated order from a cover member side,
wherein the retardation layer has an in-plane retardation Re(550) of 3,000 nm or more,
wherein the head-up display apparatus is configured so that an angle of reflection of the projection light output from the housing through the opening portion with respect to a windshield is from 2° to 35°, is from 40° to 45°, or is from 75° to 89°,
wherein the angle of reflection and an angle of incidence of the projection light have the same value, and
wherein an angle formed between an absorption axis of the polarizer and a slow axis of the retardation layer is from 35° to 55°.