Curved Near-Eye Display Optical Module for Lower Processing Complexity
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Solution Overview
Problem
Existing near-eye display devices face challenges with complex processing operations, high processing difficulty, and high costs due to the use of planar and curved structures in their optical modules, leading to issues such as limited view field angle and insufficient brightness.
Innovation Solution
The optical module features a substrate with first and second curved surfaces, each including reflection and exit areas, where at least one surface is a continuous curved surface, allowing for simplified processing and reduced light loss, thereby improving imaging quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If planar and curved structures are used in optical modules, then imaging quality can be improved, but processing operations become complex and costs increase
Solution Approach 1:
The patent applies curvature to the optical waveguide surface, transforming it from a planar structure to a curved structure. This curved surface design enables improved light coupling and imaging quality while the patent specifically addresses the manufacturing challenge by providing methods to form these curved structures, thus resolving the contradiction between improved imaging quality and processing complexity
Solution Approach 2:
The patent changes the geometric parameters of the optical waveguide, specifically introducing curvature radius as a new parameter. By controlling the curvature radius and other geometric parameters during manufacturing, the patent achieves improved imaging quality while managing the complexity through parameterized design approaches
2Illumination intensity
If traditional optical module designs are used, then coupling areas can be formed, but view field angle is limited and brightness is insufficient
Solution Approach 1:
The curved surface design of the optical waveguide expands the exit area and improves light distribution across different viewing angles. The curvature enables broader view field angle and enhanced brightness by optimizing the optical path and light emission characteristics, directly addressing the limitations of traditional planar designs
3Loss of energy
If optical waveguides with larger coupling areas are used, then light coupling efficiency can be improved, but the volume of the optical module increases
Solution Approach 1:
The patent transitions from a two-dimensional planar coupling area to a three-dimensional curved surface structure. By utilizing the third dimension (curvature), the patent achieves larger effective coupling area and improved light coupling efficiency without proportionally increasing the overall volume of the optical module, as the curvature allows for more efficient space utilization
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
This design simplifies processing operations, reduces processing difficulty and costs, and enhances imaging quality by improving brightness and view field angle, while also allowing integration with ordinary glasses.
Implementation Method 1
the light rays sequentially pass through the incident area, the first reflection area, the second reflection area
Implementation Method 2
the light rays sequentially pass through the incident area, the first reflection area, the second reflection area, and are emitted from the exit area
Implementation Method 3
at least one of the first curved surface and the second curved surface is a continuous curved surface
Data Source
AI summary
An optical module for a near-eye display device includes a substrate including a first curved surface and a second curved surface spaced apart from each other. The first curved surface has a first reflection area and an exit area located on periphery of the first reflection area, and the second curved surface has an incident area and a second reflection area located on periphery of the incident area. At least one of the first curved surface and the second curved surface is a continuous curved surface. The incident area is configured for receiving light rays. The light rays pass through the incident area, the first reflection area, the second reflection area, and are emitted from the exit area. A shape of a projection of each of the first reflection area and the incident area in a first direction is an ellipse. The near-eye display device is further provided.