Head-up display with transparency mask
A head-up display has an image generator, an optical system, a transmissive screen and a transparency mask. The transparency mask is arranged close to a display of the image generator. A mask pixel map is applied to the processed image to get a masked image.
1. A head-up display comprising:
an optical system having a light source, at least one lens, and at least one mirror;
an image generator coupled to the optical system;
a transmissive screen coupled to the image generator; and
a display;
a transparency mask, wherein the transparency mask is a transparent medium having a non-transparent pattern of half-tone shapes applied thereto to provide varying opacity, wherein the transparency mask has a transparent area in the centre and an opaque area at the outside, and between these a soft transition area, the transparency mask located between the light source and the display and being arranged close to the display.
2. The head-up display of claim 1 further comprising:
a diffuser;
wherein the transparency mask is located between the diffuser and display.
3. The head-up display of claim 2 ,
wherein the transparency mask is located between the light source and the diffuser.
4. The head-up display of claim 1 , wherein the transparency mask is integrated into an optical element, said optical element being one of the diffuser and the optical system.
5. The head-up display of claim 4 , wherein the transparency mask is an outside layer of said optical element.
6. The head-up display of claim 5 , wherein the transparency mask is an intermediate layer of said optical element.
7. The head-up display of claim 6 , wherein the optical element is a diffuser having low opacity in a central area and increasing opacity in a peripheral area.
8. A head-up display comprising:
an optical system having a light source, at least one lens, and at least one mirror;
an image generator coupled to the optical system;
a transmissive screen coupled to the image generator;
a display; and
a transparency mask, located between the light source and the display wherein the transparency mask is a transparent medium having a non-transparent pattern of half-tone shapes applied thereto to provide varying opacity, the transparency mask being arranged close to the display, wherein the transparency mask has a low opacity in a central area and increasing opacity in a peripheral area.
9. The head-up display of claim 8 further comprising:
a diffuser;
wherein the transparency mask is located between the diffuser and display.
10. The head-up display of claim 9 ,
wherein the transparency mask is located between the light source and the diffuser.
11. The head-up display of claim 9 , wherein the transparency mask is integrated into an optical element, said optical element being one of the display, the diffuser and the optical system.
12. The head-up display of claim 11 , wherein the transparency mask is an outside layer of said optical element.
13. The head-up display of claim 11 , wherein the transparency mask is an intermediate layer of said optical element.
14. The head-up display of claim 8 , further comprising a postcard masking unit that applies a masking effect on an image.
15. The head-up display of claim 8 , wherein the transparency mask applies a postcard masking effect on an image.
16. The head-up display of claim 4 , wherein the transparency mask is a surface coating applied to the optical element.
17. The head-up display of claim 16 , wherein the transparency mask is a painted layer.
18. The head-up display of claim 9 , wherein the transparency mask is a surface coating applied to one of an element of the optical system, the diffuser; and the display.
19. The head-up display of claim 18 , wherein the transparency mask is a painted layer.