Head mounted type display device based on holographic waveguide

Abstract

The invention discloses a head mounted type display device based on holographic waveguide. The head mounted type display device comprises inlet coupling grating (1), left visual field deflection grating (2), right visual field deflection grating (3), outlet coupling grating (4), and rectangular waveguide (5). The inlet coupling grating (1), the left visual field deflection grating (2), the right visual field deflection grating (3), and the outlet coupling grating (4) are attached to the upper surface or the lower surface of the rectangular waveguide (5). Whether the inlet coupling grating (1), the left visual field deflection grating (2), the right visual field deflection grating (3), the outlet coupling grating (4), and the rectangular waveguide (5) are attached to the upper surface or the lower surface is determined by an exit entrance pupil light design direction. By adopting a pupil remodeling way, a visual field separation problem of a conventional two-dimensional pupil dilation way under a large visual field angle condition is solved.

Description

technical field [0001] The invention relates to a head-mounted display device, which uses a waveguide system to transmit images in front of the wearer's eyes to realize the application of augmented reality. Background technique [0002] With the development of technology, display devices are widely used on various carriers. As an off-axis optical system, the waveguide system can realize the application of transmissive display, that is, the application of augmented reality by projecting a specific image frame in front of the viewer without blocking the external light environment. At the same time, compared with the traditional imaging method, the waveguide display method, because the light is folded and propagated in the waveguide, can be coupled and exported at different positions in the waveguide, so it is not limited by the Lagrangian optical infinity, and can achieve uniformity in a certain field of view. Pupil dilation output. Waveguide display systems typically utiliz...

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Problems solved by technology

[0004] However, for the existing holographic waveguide system, there are discontinuous exit pupils and separation of field of view

Although the existing technology tries to make the exit pupil continuous and uniform through the two-dimensional exit pupil expansion method, most of the designs in the prior art only aim at the uniform expansion of the exit pupil at a specific field of view (generally the central field of view), so that in the Severe field of view splitting occurs when the field of view angle is large

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