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Paramétrages

Paramétrages

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1. WO2016118643 - DISPOSITIF D'AFFICHAGE À RÉFLEXION TOTALE INTERNE

Note: Texte fondé sur des processus automatiques de reconnaissance optique de caractères. Seule la version PDF a une valeur juridique

[ EN ]

CLAIMS

1. A display device comprising:

a display, operable to generate a real image; and

an optical system, comprising one or more lenslets, arranged to generate a virtual sub-image from a respective partial real image on the display, by each lenslet projecting light from the display to an eye position;

wherein the sub-images combine to form a virtual image viewable from the eye position;

wherein at least one of the lenslets is such that the light rays from the display to the eye position are deflected sequentially at least four times by a refraction (R), a reflection (X), a total internal or metallic reflection (I), and a refraction (R) in that order (RXIR lenslet).

2. The display device of claim 1, further comprising a display driver operative to receive an input image, and to generate the respective partial real images such that the resulting virtual sub-images align to form a virtual image of said input image as said viewable virtual image.

3. The display device of claim 1, wherein the first refraction (R) and the total internal or metallic reflection (I) are performed by the same surface with non-coincident overlapping clear apertures.

4. The display device of claim 1, wherein the one or more lenslets comprise at least two said RXIR lenslets.

5. The display device of claim 1, wherein the one or more lenslets comprise at least one said RXIR lenslet and at least one lenslet that is a non-RXIR lenslet.

6. The display device of claim 5, wherein the at least one RXIR lenslet generates its virtual sub-image at a central portion of the viewable virtual image, and the at least one non-RXIR lenslet generates its virtual sub-image at a portion of the virtual image nearer to a periphery of the viewable virtual image.

7. The display device of claim 1, wherein at least two lenslets are non-superposable.

8. The display device of claim 1, arranged to produce partial virtual images comprising a foveal part projected by an eye onto a 1.5 mm fovea of an eye when said eye is at the position of an imaginary sphere at said eye position with its pupil within the pupil range, said foveal part having a higher resolution than a peripheral part of the viewable virtual image.

9. The display device of claim 1, wherein the optics is placed at a distance from an eye sphere at the eye position between 5 and 40 mm, the at least one lenslet forming an array subtending a solid angle from a closest point of the eye sphere comprising a cone with 40 degrees whole angle, wherein the display is on a side of the optics remote from the eye sphere, at a distance from the optics of no more than 80 mm.

10. The display device of claim 1, wherein the respective partial real images on the display comprise at least two partial real images that overlap on a same portion of the display and that are activated during different time periods, and wherein different lenslets image said same portion of the display to different sub-images at different positions of the virtual image.

11. The display device of claim 1, further comprising a stray-light control system that removes light not contributing to the virtual sub-images.

12. The display device of claim 11, wherein the stray-light control system comprises light-absorbent material in a part of the display device not crossed by light rays contributing to the virtual sub-images.

13. The display device of claim 11, wherein the stray-light control system comprises a polarizer and a half-wave rotator arranged to absorb light reflected back towards the display.

14. The display device of claim 1, further comprising an eye tracking system using a camera.

15. A headgear comprising the display device of claim 1, with a mount for positioning the display device on a human head with the eye position of the display device coinciding with an eye of the human.

16. The headgear of claim 15, further comprising a second display device according claim 1, mounted with the eye position of the second display device coinciding with a second eye of the human.