Electrowetting Light Modulating Cells for 3D Display
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Solution Overview
Problem
Conventional 3D image display systems face limitations in dynamically modulating light beam directions and achieving high display quality due to static passive lenticular lenses and reduced aperture ratios from complex interconnect layers, which restrict the visibility of large display areas.
Innovation Solution
The implementation of electronically switchable light modulating cells using the electrowetting principle, where a light modulating medium adjusts light beam directions based on electric potential differences across electrodes, enabling time-sharing and synchronization to form stereoscopic images without the need for complex interconnect layers, thus enhancing display quality and reducing area usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If static passive lenticular lenses are used to control light beam directions, then the structure is simple, but the light beam directions cannot be dynamically modulated and display quality is limited
Solution Approach 1:
The patent applies electrowetting cells that can dynamically change the shape of liquid-liquid interfaces through voltage control, transforming static lenticular lenses into dynamic light modulating elements. The interface curvature can be adjusted in real-time to modulate light beam directions, enabling dynamic adaptation while maintaining a relatively simple cell structure.
Solution Approach 2:
The patent changes physical parameters of the light modulating medium by applying different voltages to the electrowetting cells. This voltage-controlled parameter change modifies the contact angle and curvature of the liquid interface, thereby dynamically adjusting light refraction angles and achieving versatile light beam direction control.
2Manufacturing precision
If complex interconnect layers are used to achieve high display quality, then display quality improves, but the aperture ratio is reduced and display area is limited
Solution Approach 1:
The patent extracts and removes the complex interconnect layers from the display structure, replacing them with electrowetting cells that directly modulate light. This extraction eliminates the light-blocking interconnect layers, increasing the aperture ratio and display area while maintaining high display quality through precise electrowetting control.
Solution Approach 2:
The patent replaces the mechanical/optical interconnect layer structure with an electro-wetting-based light modulating system. This substitution uses electrical fields to control liquid interface shapes, achieving light modulation without physical interconnect layers, thereby maximizing the aperture ratio.
3Productivity
If conventional light control methods are used, then the system is simple, but the refresh frequency is limited and cannot achieve high-speed 3D image formation
Solution Approach 1:
The patent employs periodic voltage switching to the electrowetting cells, enabling high-speed alternating modulation of light beams for left and right eyes. This periodic action achieves refresh frequencies greater than 120 Hz, supporting high-speed 3D image formation through time-sequential light direction control.
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 approach allows for dynamic modulation of light beam directions, saving at least 50% of display area and achieving high display quality by using electronically switchable light modulating cells, which can operate at refresh frequencies greater than 120 Hz, enabling efficient 3D image formation perceivable to viewers.
Implementation Method 1
a light modulating medium filled in the compartment and adapted to adjust the directions of light beams traveling from the first substrate to the second substrate in accordance with an electric potential difference across the first, second and third electrodes
Implementation Method 2
a high-contact-angle material layer formed on the dielectric layer
Data Source
AI summary
A 3D image display system with high resolution is disclosed. The system may deflect left and right eye images to a left and right eye of a viewer, respectively. As such, the viewer can see 3D images. With a time-sharing mode, all of electronically switchable light modulating cells are configured to modulate all of the images deflected to the left eye of the viewer during a first period, and modulate all of the images to the right eye of the viewer during a second period, and the first period and the second period are alternate periods. Alternatively, a part of the electronically switchable light modulating cells are configured to modulate left eye images deflected to the left eye of the viewer, and another part of the electronically switchable light modulating cells are configured to modulate right eye images to the right eye of the viewer during the same period.