Lens of display device capable of being worn on user's head and generating images, and display device having such lens

Abstract

The invention relates to a lens for a display device (1) that can be worn on the head of a user and that produces an image, said lens comprising: a lens body (7) having a front side (8) and a back side (9); Viewed in top view of the lens (3, 4), the coupling-in segment (20) in the edge region (12) of the lens (3, 4) and the coupling-in segment (20) in the central region (13) of the lens (3, 4) Output segment (21); two opposite reflective surfaces (8, 9) in the coupling input segment (20); grinding surface (26), the coupling input segment of the grinding surface in the lens body (7) In the region of the segment (20), embedded between the two reflective surfaces (8, 9), and arranged next to each other in the first region in the direction from the coupling-in segment (20) to the coupling-out segment (21) (30) and in the second area (31) connected with the first area, wherein, the grinding surface (26) in the first area (30) plays a partial reflection effect or plays a reflection effect, and in the second area (31 ) is partially reflective, and the directly adjacent grinding surfaces (26) in the second region are connected by side faces (27), which are partially transparent or transparent, wherein the lens (3, 4) is suitable for coupling in the light beams (24, 24) from the pixels of the generated image by means of the incoupling segments (20) of the optics (3, 4) into the optics (3, 4) ', 24") in the mirror (3, 4) is guided to the outcoupling segment (21) by reflection, and is coupled out from the mirror (3, 4) via the outcoupling segment (21), in the first region ( The grinding surface (26) in 30) at least partly reflects the light beam (24', 24") that hits it for coupling-in to the second reflective surface (9), on the second reflective surface, in order to guide the light beam (24', 24") to reflect toward the direction of the first reflective surface (8), thus, the light beam hitting the side (27) in the second area (31) extends through the side (27) to reach the second A reflective surface (8), and is reflected on the first reflective surface (8) for guiding the light beam, after reflection is transmitted in the second region (31) through the partially reflective abrasive surface (26).

Description

technical field [0001] The present invention relates to a lens of a display device capable of being worn on the head of a user and generating images, and to a display device having such a lens. Background technique [0002] Such optics are usually designed in such a way that the light beams from the pixels of the generated image are coupled into the optic via incoupling segments, where they are guided to the outcoupling segments by total internal reflection on the front and back sides , and in the outcoupling section the inflection takes place in such a way that the outcoupling takes place by means of the rear side of the lens. [0003] Difficulties can arise in the coupling-in section that the already coupled-in or deflected light beams, after total internal reflection at the back, strike the coupling-in area again and are deflected in an undesired manner by the coupling-in area , so that the beam becomes distorted light (Falschlicht). To avoid this, the lens thickness ha...

AI Technical Summary

Problems solved by technology

[0003] Difficulties can arise in the coupling-in section that the already coupled-in or deflected light beams, after total internal reflection at the back, strike the coupling-in area again and are deflected in an undesired manner by the coupling-in area , making the beam into a distorted light (Falschlicht)

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