Patent ID: 11960080
Assignee: NIPPON SEIKI CO., LTD.
Field: Optics (Instruments)
Classification: CPC G  B | IPC B  G

Claim 0:
1. A head-up display device comprising:
a light source that emits light;
a liquid crystal panel that receives the light from the light source and emits display light;
a first mirror that reflects the display light from the liquid crystal panel and causes the reflected display light to cross in a crossing direction at a cross point;
a second mirror that reflects the display light that has been reflected at the first mirror and has passed the cross point;
a first optical element that converges the light from the light source to cause the display light to reach the first mirror in a converged state;
a second optical element that substantially collimates light emitted from the light source; and
a third optical element that diverges the light substantially collimated by the second optical element and then emits the substantially collimated light to the first optical element,
wherein an incident surface and a light emitting surface of the third optical element are formed in a cylindrical lens array shape extending in mutually intersecting directions.