Projection device for smart glasses, method for representing image information, using a projection device, and control unit

Patent metadata

Field	Value
Publication number	US-12105291-B2
Application number	US-202117796185-A
Country	US
Kind code	B2
Filing date	Feb 4, 2021
Priority date	Mar 20, 2020
Publication date	Oct 1, 2024
Grant date	Oct 1, 2024

Abstract

A projection device for smart glasses. The projection device includes an image generating unit for generating at least one first light beam representing image information, and at least one deflecting element, which is configured to deflect the first light beam in the form of a second light beam representing first image information, and to deflect the first light beam in the form of a third light beam representing second image information, into a first field of vision and/or into a second field of vision of an eye; the second light beam and the third light beam differing with regard to a beam divergence; and the second field of vision and the first field of vision at least overlapping.

First claim

What is claimed is:

1. A projection device for smart glasses, comprising:
an image generating unit configured to generate at least one first light beam representing image information; and
at least one deflecting element configured to deflect the first light beam in the form of a second light beam representing first image information, and to deflect the first light beam in the form of a third light beam representing second image information, into a first field of vision of an eye and/or a second field of vision of the eye;
wherein the second light beam and the third light beam differ from one another with regard to a beam divergence,
wherein the second field of vision and the first field of vision at least overlapping, and
wherein the deflecting element includes a first hologram layer to deflect the first light beam in the form of the second light beam representing the first image information, and to deflect the first light beam in the form of the third light beam representing the second image information, into the first field of vision of the eye and/or the second field of vision of the eye.

2. The projection device as recited in claim 1 , wherein the deflecting element is configured to deflect the first image information into the first field of vision and/or the second field of vision, and to deflect the second image information into the first field of vision and/or second field of vision, the second field of vision and the first field of vision being positioned so as to be coincident.

3. The projection device as recited in claim 1 , wherein the first image information has a higher perceived image sharpness than the second image information; the deflecting element being configured to represent the first image information and/or the second image information within a central field of vision of the eye in the form of the first field of vision, and/or within a peripheral field of vision of the eye in the form of the second field of vision.

4. The projection device as recited in claim 1 , wherein the deflecting element is configured to deflect the first light beam in the form of the second light beam representing the first image information, to a point situated behind a pupil of the eye, and/or to deflect the first light beam in the form of the third light beam representing the second image information, to a point situated in front of or in back of the pupil of the eye.

5. The projection device as recited in claim 4 , wherein the deflecting element is configured to deflect the first light beam in the form of the second light beam and/or the first light beam in the form of the third light beam, to the point, which represents a center of rotation of the eye.

6. The projection device as recited in claim 1 , wherein the deflecting element includes a second and third hologram layer, the second hologram layer being situated in a layer different from the third hologram layer, the second hologram layer being configured to deflect the first light beam in the form of the second light beam representing the first image information, into the first field of vision of the eye and/or the second field of vision of the eye, and the third hologram layer being configured to deflect the first light beam in the form of the third light beam representing the second image information, into the first field of vision of the eye and/or the second field of vision of the eye.

7. The projection device as recited in claim 1 , wherein the projection device additionally includes at least one lens, the lens being configured split up the first light beam into the second light beam representing the first image information, and into the third light beam representing the second image information.

8. The projection device as recited in claim 1 , wherein in the case of a specific direction of view, the deflecting element is configured to increase and/or decrease, a first luminous flux of the second light beam representing the first image information, within a central field of vision of the eye in the form of a first field of vision, in comparison with a second luminous flux of the third light beam representing the second image information, within the central field of vision of the eye.

9. The projection device as recited in claim 8 , wherein the deflecting element is configured to adjust a third luminous flux of the third light beam representing the second image information, in a peripheral field of vision of the eye, with respect to a fourth luminous flux of the second light beam representing the first image information, in a peripheral field of vision of the eye.

10. The projection device as recited in claim 9 , wherein the deflecting element is configured to increase and/or decrease a fifth luminous flux of the second light beam representing the first image information, in comparison with a sixth luminous flux of the third light beam representing the second image information, in the central field of vision and in the peripheral field of vision.

11. The projection device as recited in claim 10 , wherein the image generating unit is configured to increase a seventh luminous flux of first light beams in the peripheral field of vision of the eye, in comparison with an eighth luminous flux of the first light beams in the central field of vision.

12. The projection device as recited in claim 1 , wherein the projection device additionally includes a direction-of-view detection unit configured to ascertain a direction of view of the eye.

13. The projection device as recited in claim 1 , wherein the projection device includes an eyeglass lens, the deflecting element being implemented as a part of the eyeglass lens, cast integrally and/or laminated in and/or applied to the eyeglass lens.

14. The projection device as recited in claim 13 , wherein the deflecting element extends over at least a major portion of a surface of the eyeglass lens.

15. The projection device as recited in claim 1 , wherein the image generating unit is configured to generate the first light beam so that the first image information and/or the second image information represents an at least two-color multicolor image.

16. A method for representing image information a projection device, the method comprising:
generating at least one first light beam; and
deflecting, via a deflecting element, the first light beam in the form of a second light beam representing first image information, and the first light beam in the form of a third light beam representing the second image information, into a first field of vision of an eye and/or a second field of vision of the eye, the first light beam being deflected so that the second light beam and the third light beam differ with regard to a beam divergence, and the second field of vision and the first field of vision at least overlapping;
wherein the deflecting element includes a first hologram layer to deflect the first light beam in the form of the second light beam representing the first image information, and to deflect the first light beam in the form of the third light beam representing the second image information, into the first field of vision of the eye and/or the second field of vision of the eye.

17. A control apparatus to represent image information with a projection device, comprising:
a control unit configured to perform the following:
generating at least one first light beam; and
deflecting, via a deflecting element, the first light beam in the form of a second light beam representing first image information, and the first light beam in the form of a third light beam representing the second image information, int

Assignees

• Bosch Gmbh Robert

Inventors

• Petersen Andreas
• Pilard Gael
• Specht Hendrik

Classifications

• G02B2027/0178

  Eyeglass type (eyeglass details G02C) · CPC title

• G02B2027/0123

  comprising devices increasing the field of view · CPC title

• G02B2027/0112

  comprising device for genereting colour display · CPC title

• G02B26/101

  with both horizontal and vertical deflecting means, e.g. raster or XY scanners (colour television using laser beams scanning a display screen H04N9/3129) · CPC title

• G02B2027/0147

  comprising a device modifying the resolution of the displayed image · CPC title