Vehicular display apparatus
A vehicular display apparatus includes a display device, a magnifying mirror, and a turning back mirror. The display device emits display light corresponding to a display image to be visually recognized by a driver on a vehicle. The magnifying mirror reflects the display light to project the display image on a windshield of the vehicle. The turning back mirror is disposed on an optical path between the display device and the magnifying mirror and has a concave reflecting surface that reflects the display light. The magnifying mirror has the magnifying power that is set higher than that of the turning back mirror.
1. A vehicular display apparatus, comprising:
a display device that emits display light corresponding to an display image to be visually recognized by a driver on a vehicle;
a first reflecting mirror that reflects the display light to project, on a windshield of the vehicle, the display image; and
a second reflecting mirror disposed on an optical path between the display device and the first reflecting mirror, and having a concave reflecting surface that reflects the display light, wherein
the first reflecting mirror has magnifying power that is set higher than magnifying power of the second reflecting mirror, and
when a distance between the second reflecting mirror and the display device is a and a focal distance of the second reflecting mirror is f, the second reflecting mirror is disposed at a position that satisfies the following expression: a>2f,
the second reflecting mirror images a real image corresponding to the display image on the optical path away from the second reflecting mirror at a distance between the second reflecting mirror and the real image, defined as b, at a magnification b/a, and
wherein the distance is measured perpendicular to the length of a display surface of the display device.
2. The vehicular display apparatus according to claim 1 , wherein
the second reflecting mirror has a reflecting surface having a spherical shape.
3. The vehicular display apparatus according to claim 1 , wherein the second reflecting mirror has a reflecting surface having an aspherical shape.
4. The vehicular display apparatus according to claim 1 , wherein the first reflecting mirror has magnifying power of five to six times.
5. The vehicular display apparatus according to claim 1 , wherein the first reflecting mirror and the second reflecting mirror have a concave reflecting surface.
6. The vehicular display apparatus according to claim 1 , wherein the first reflecting mirror moves rotationally according to the height of a driver.