Claims
- 1. A display apparatus for vehicles comprising:
- a display device;
- first and second prisms stacked together with the prism apex angles being directed in opposite directions to each other, the first and second prisms being disposed in close relation to the display surface of the display device;
- a reflecting member to reflect the display light that has passed through the prisms toward the viewing point of a driver of the vehicle;
- means for emitting the display light from the display device as a P-polarization light through said stacked prisms and toward the reflecting surface of the reflecting member; and
- polarized direction rotating means disposed between the prisms and the reflecting member to rotate by 90 degrees to change the direction of light polarization from P-polarization light to S-polarization light the polarized direction of the display light which has passed the prisms wherein the light caused to impinge on the reflecting member is S-polarization light.
- 2. A display apparatus as defined in claim 1, wherein
- said display device is a transmission type liquid crystal display element having a backlight.
- 3. A display apparatus as defined in claim 1, wherein
- said polarized direction rotating means is comprised of a TN-type liquid crystal panel.
- 4. A display apparatus as defined in claim 1, wherein
- said polarized direction rotating means is comprised of 1/2 wavelength plate.
- 5. A display apparatus as defined in claim 1, wherein said reflecting member comprises windshield means.
- 6. A display apparatus as defined in claim 1, wherein said first and second prisms are made of glass or resin.
Priority Claims (1)
Number |
Date |
Country |
Kind |
5-094204 |
Apr 1993 |
JPX |
|
Parent Case Info
This applicatoin is a continuation application Ser. No. 08/230,246 filed Apr. 20, 1994, now abadoned.
US Referenced Citations (5)
Foreign Referenced Citations (4)
Number |
Date |
Country |
2-141720 |
May 1990 |
JPX |
2-294615 |
Dec 1990 |
JPX |
3-117271 |
Dec 1991 |
JPX |
5-22156 |
Mar 1993 |
JPX |
Continuations (1)
|
Number |
Date |
Country |
Parent |
230246 |
Apr 1994 |
|