Liquid Crystal Glasses Light Leakage Elimination Element
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Solution Overview
Problem
Liquid crystal optical devices, such as varifocal glasses and display panels, suffer from light leakage due to the non-ideality of lens units, which causes stray light spots and reduces contrast and viewing effectiveness.
Innovation Solution
Incorporating a light leakage elimination element comprising a wire grid polarizer and a half-wave plate stacked in sequence, positioned between the lens unit and the liquid crystal layer, to block light from invalid areas and prevent it from escaping, thereby ensuring that light is refracted only within the intended imaging area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a lens unit is integrated to control light refraction and convergence, then the focusing function is improved, but light leakage and stray light spots occur due to non-ideality of the lens
Solution Approach 1:
A light leakage elimination element is introduced as an intermediary component between the lens unit and the liquid crystal layer. This element includes a wire grid polarizer and a half-wave plate that work together to eliminate stray light from invalid areas while preserving the focusing function of the lens unit. The wire grid polarizer blocks light from invalid areas, and the half-wave plate adjusts the polarization direction to ensure effective light leakage elimination.
Solution Approach 2:
The light leakage elimination element is selectively positioned to address only the specific problem areas (invalid areas) of the lens unit without affecting the valid imaging areas. The element's structure and positioning are designed to target light leakage from specific regions while maintaining the overall optical performance of the lens system.
2Object-generated harmful factors
If the light leakage elimination element is added to block stray light, then light leakage is reduced, but the device structure becomes more complex
Solution Approach 1:
The light leakage elimination element merges multiple functional components (wire grid polarizer and half-wave plate) into a single integrated structure that performs both polarization control and light blocking functions. This combined approach reduces the number of separate components needed while achieving effective light leakage elimination.
Solution Approach 2:
The light leakage elimination element serves multiple functions simultaneously: it blocks light from invalid areas, adjusts polarization direction, and maintains the focusing function of the lens unit. This multi-functionality reduces the need for additional separate components, thereby limiting the increase in device complexity.
3Object-generated harmful factors
If the wire grid polarizer width is increased to improve light blocking, then light leakage elimination effectiveness is improved, but the manufacturing precision requirements increase
Solution Approach 1:
The patent specifies a particular width range for the wire grid polarizer (6-30 μm) that optimizes the balance between light blocking effectiveness and manufacturing feasibility. This parameter range was selected to achieve sufficient light leakage elimination while remaining within practical manufacturing precision capabilities.
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 solution effectively prevents light leakage by changing the polarization direction of light entering invalid areas, ensuring that light is refracted only within the target imaging area, thereby enhancing the viewing effect and reducing interference, thus improving the imaging and display quality.
Implementation Method 1
The light leakage elimination element includes a wire grid polarizer and a half-wave plate stacked in sequence in a direction away from the second electrode; the wire grid polarizer is configured to block light having a second polarization direction perpendicular to the first polarization direction
Implementation Method 2
The light leakage elimination element includes a wire grid polarizer and a half-wave plate stacked in sequence in a direction away from the second electrode
Implementation Method 3
one of the valid area and the invalid area is configured to converge to a collimated light beam through refraction, and the other of the valid area and the invalid area is configured to diverge a parallel light beam through refraction
Data Source
AI summary
Provided are liquid crystal glasses and display panel having light leakage elimination element. Glasses includes: opposite first and second substrates; first electrode on side of first substrate facing second substrate; second electrode on side of second substrate facing first substrate and on side of first electrode distal to first substrate; liquid crystal layer between first and second electrodes; lens unit including valid and invalid areas, one of which converges to collimated light by refraction and the other diverges parallel light through refraction; light leakage elimination element between second electrode and lens unit, including wire grid polarizer and half-wave plate sequentially away from the second electrode, orthographic projections of light leakage elimination element and invalid area on second substrate at least partially overlapping; light blocking element on side of liquid crystal layer distal to second electrode and prevents light passing through light leakage elimination element and invalid area from exiting glasses.