Near-Eye Waveguide Display Using Single-Display Beam Splitting
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Solution Overview
Problem
Existing near-eye display devices, such as AR glasses or MR glasses, are large in size, leading to a poor wearing experience for users.
Innovation Solution
A near-eye display device utilizing an optical waveguide with a single display that splits image light into two beams, which are coupled out through separate members to project images to each eye, reducing the number of displays and increasing design freedom, weight, and power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple displays are used to project images to each eye, then image quality and stereoscopic effect are improved, but device size and weight increase
Solution Approach 1:
The patent segments the optical path by using a single display to generate one image beam that is then divided into two separate light beams through an optical splitter assembly. This allows each eye to receive a separate image beam while using only one display, reducing device weight while maintaining stereoscopic image quality.
Solution Approach 2:
The patent introduces an optical splitter assembly as an intermediary component between the single display and the two eyes. This intermediary divides the single image beam into two separate beams, enabling stereoscopic display with a single display unit, thus reducing weight without compromising image quality.
2Reliability
If multiple displays are used to project images to each eye, then image quality and stereoscopic effect are improved, but device volume increases
Solution Approach 1:
The patent segments the optical path by using a single display to generate one image beam that is then divided into two separate light beams through an optical splitter assembly. This allows each eye to receive a separate image beam while using only one display, reducing device volume while maintaining stereoscopic image quality.
Solution Approach 2:
The patent introduces an optical splitter assembly as an intermediary component between the single display and the two eyes. This intermediary divides the single image beam into two separate beams, enabling stereoscopic display with a single display unit, thus reducing volume without compromising image quality.
3Weight of moving object
If a single display is used with optical splitting, then device size and weight are reduced, but optical complexity increases
Solution Approach 1:
The patent merges multiple optical components (optical splitter assembly with first and second splitting parts, first and second coupling-out members) into an integrated structure that works together to divide and direct light beams. This combination achieves weight reduction through single-display operation while managing optical complexity through coordinated component design.
Solution Approach 2:
The patent introduces an optical splitter assembly as an intermediary component between the single display and the two eyes. This intermediary divides the single image beam into two separate beams, enabling stereoscopic display with a single display unit, thus reducing weight without compromising image quality.
4Weight of moving object
If a single display is used with optical splitting, then device size and weight are reduced, but manufacturing precision requirements increase
Solution Approach 1:
The patent segments the optical path by using a single display to generate one image beam that is then divided into two separate light beams through an optical splitter assembly. This allows each eye to receive a separate image beam while using only one display, reducing device weight while maintaining stereoscopic image quality.
Solution Approach 2:
The patent introduces an optical splitter assembly as an intermediary component between the single display and the two eyes. This intermediary divides the single image beam into two separate beams, enabling stereoscopic display with a single display unit, thus reducing weight without compromising image quality.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The device achieves a smaller size, lower power consumption, and improved wearing experience with enhanced design flexibility and reduced maintenance costs.
Implementation Method 1
The optical splitter assembly includes a first diffraction grating and a second diffraction grating, wherein the first diffraction grating is configured to diffract the first image light into a first light beam and a second light beam
Implementation Method 2
The optical splitter assembly includes a first diffraction grating and a second diffraction grating
Implementation Method 3
The first coupling-out member includes a first semi-reflective mirror, wherein the first semi-reflective mirror is configured to reflect the first light beam
Implementation Method 4
The second coupling-out member includes a second semi-reflective mirror, wherein the second semi-reflective mirror is configured to reflect the second light beam
Implementation Method 5
The optical waveguide defines a first surface and a second surface, the first surface is close to a user of the near-eye display device, the second surface is away from the user
Data Source
AI summary
The present application provides a near-eye display device. The near-eye display device includes an optical waveguide, a display, an optical splitter assembly, a first coupling-out member and a second coupling-out member. The optical waveguide defines a first surface and a second surface; the first surface defines a first emergent area and a second emergent area. The display is located on the optical waveguide. The optical splitter assembly is configured to split the first image light into a first light beam and a second light beam. The first light beam propagates within the optical waveguide to the first coupling-out member, and the first coupling-out member is configured to couple the first light beam out of the optical waveguide. The second light beam propagates within the optical waveguide to the second coupling-out member, and the second coupling-out member is configured to couple the second light beam out of the optical waveguide.