Large-view-field compact near-to-eye display device

Abstract

The invention discloses a large-view-field compact near-to-eye display device, and the device comprises a self-luminous LCOS module, an optical-mechanical module, a coupled-in triangular prism, a waveguide plate and a coupled-out module. The self-luminous LCOS module comprises an LCOS displayer provided with a white light LED. The optical machine module comprises a linear polarizing film, a PBS, afirst quarter-wave plate, a concave reflector, a second quarter-wave plate and a convex reflector. The incident plane of the optical-mechanical module is parallel to the self-luminous LCOS module, the upper end surface and the lower end surface of the waveguide plate are parallel, and a first preset included angle is formed between the waveguide plate and the emergent plane coupled into the triangular prism; the coupling-out module comprises a color multiplexing body holographic grating manufactured based on the angle multiplexing technology, is attached to the upper end face of the waveguidesheet and is used for coupling out polarized light transmitted by the waveguide sheet. According to the invention, the multiplexed color volume holographic grating manufactured based on the angle multiplexing technology is used as an optical coupling-out device, so that the dynamic range of human eye observation is greatly increased, and the field of view is expanded.

Description

technical field [0001] The invention relates to the technical field of near-eye devices, in particular to a compact near-eye display device with a large field of view. Background technique [0002] The near-eye display device provides a function of real-time field interaction with a real environment that is not available in traditional display devices, thereby bringing a brand-new visual experience to users, and is therefore widely used in various fields. The primary problem in near-eye display is how to reduce the volume and weight of the display device, and provide sufficient information and field of view to achieve near-eye three-dimensional rendering with light equipment, high spatial resolution, and high angular resolution. [0003] The holographic waveguide combines the total reflection characteristics of the waveguide and the diffraction characteristics of the holographic grating to achieve a large field of view and large exit pupil image output, which can be applied ...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a compact near-eye display device with a large field of view, using the multiplexed color volume holographic grating made based on angle multiplexing technology as an optical coupling device to obtain three-dimensional virtual object image information at a multi-angle channel, greatly Increase the dynamic range of human eye observation, thereby expanding the field of view, to solve the problem that the dynamic field of view of the holographic waveguide is greatly limited due to the selectivity of the volume holographic grating to wavelength and angle

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