Near-Eye Display Optical Module with Short-Distance Amplification
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Solution Overview
Problem
There is a lack of optical amplification modules capable of large-multiple amplification within a short distance (less than 5 cm) and near-eye display optical modules that can achieve a super large field of view (over 100 degrees) within a short distance (less than 3 cm).
Innovation Solution
A short-distance optical amplification module comprising a 45 degree phase delay sheet, a partial-transmission and partial-reflection curved lens, a second 45 degree phase delay sheet, and a reflective polarizing sheet, which allows light to be reflected twice for large-multiple amplification, and a near-eye display optical module using this module to achieve a large-angle adjustment and super large field of view by coaxial arrangement of the display screen, phase delay sheets, and polarizing sheets with light absorption materials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If conventional optical amplification modules are used, then the structure is simple, but the amplification multiple is low and the distance is long (greater than 5 cm)
Solution Approach 1:
The optical amplification module is divided into multiple functional segments: a first 45-degree phase delay sheet, a partial transmission and partial reflection curved lens, a second 45-degree phase delay sheet, and a reflective polarizing sheet. Each segment performs a specific function in the light modulation process, enabling compact high-multiple amplification within 5 cm by breaking down the amplification function into discrete optical elements rather than using a single complex component
Solution Approach 2:
The patent introduces a dual-reflection dimension by incorporating both a partial transmission and partial reflection curved lens and a reflective polarizing sheet. Light undergoes first reflection at the reflective polarizing sheet and second reflection at the partial transmission and partial reflection curved lens, creating a multi-dimensional light path folding that achieves high amplification in a compact space. This dimensional approach to light path manipulation enables the optical module to achieve greater than 100-degree field of view within 3 cm distance
2Adaptability or versatility
If the field of view is increased to over 100 degrees, then the display coverage is improved, but the optical path length increases (greater than 3 cm)
Solution Approach 1:
The patent employs a curved lens (specifically a partial transmission and partial reflection curved lens) instead of flat optical surfaces. This curvature enables the light paths to be folded more efficiently, achieving over 100-degree field of view within a compact 3 cm optical path length. The curved surfaces allow for broader light acceptance angles and more effective light redirection compared to planar optics
Solution Approach 2:
The optical elements are arranged in a nested, coaxial configuration where the display screen, phase delay sheets, curved lens, and polarizing sheet are sequentially positioned along the same optical axis. This nested arrangement maximizes space utilization and enables the compact design to achieve wide field of view by folding the light path multiple times within the same spatial envelope
3Productivity
If multiple reflections are introduced for high amplification, then the amplification multiple increases, but the luminance loss increases
Solution Approach 1:
The patent carefully controls the reflection parameters of each optical element. The reflective polarizing sheet is designed with high reflectivity for the specific polarization state, and the partial transmission and partial reflection curved lens is optimized to provide the necessary reflection while maintaining adequate transmission. By adjusting these optical parameters, the system achieves high amplification through dual reflection while minimizing luminance loss at each reflection interface
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 solution enables large-multiple amplification and a super large field of view within a short distance, maintaining a small overall optical channel thickness and minimizing luminance loss, allowing for high amplification and clear display results.
Implementation Method 1
a first 45 degree phase delay sheet, a partial-transmission and partial-reflection curved lens, a second 45 degree phase delay sheet and a reflective polarizing sheet sequentially arranged
Implementation Method 2
generates a first reflection at the reflective polarizing sheet, then reaches the partial-transmission and partial-reflection curved lens through the second 45 degree phase delay sheet, generates a second reflection at the partial-transmission and partial-reflection curved lens
Implementation Method 3
a partial-transmission and partial-reflection curved lens
Implementation Method 4
a reflective polarizing sheet sequentially arranged
Implementation Method 5
generates a first reflection at the reflective polarizing sheet
Implementation Method 6
the axial side thereof is coated with light absorption materials
Data Source
AI summary
A short-distance optical amplification module and a near-eye display optical module using the same in the present invention relates to an optical amplification module applicable for short distance and an optical module using the same for near-eye display. The purpose of the present invention is to provide an optical amplification module for large-multiple amplification within a short distance (less than 5 cm) and a near-eye display optical module using the same to achieve super large field of view within a short distance (less than 3 cm). The short-distance optical amplification module in the present invention comprises a first 45 degree phase delay sheet (2), a partial-transmission and partial-reflection curved lens (4), a second 45 degree phase delay sheet (5) and a reflective polarizing sheet (6) which are sequentially arranged. The near-eye display optical module in the present invention comprises a display screen (1) disposed on the side of the first 45 degree phase delay sheet (2) away from the partial-transmission and partial-reflection curved lens (4).