Electrowetting Lens Array for 3D Depth Perception
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Solution Overview
Problem
Current 3D image display technologies, such as glasses-type and glassless-type devices, face limitations in providing increased depth perception and full parallax, leading to user fatigue and restricted viewing angles, while methods like holographic and integral imaging suffer from high costs, noise, and limited depth perception.
Innovation Solution
A 3D image display apparatus utilizing an electrowetting lens array with electrically adjustable focal distance, comprising a fly-eye lens array of electrowetting lens cells with vertically erected barriers, electrodes, and a multilayer dielectric structure, allows for sequential projection of images at varying focal distances to enhance depth perception.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If integral imaging method using fly-eye lens array is used, then color display and continuous viewing angle are improved, but depth perception is limited and viewing angle remains narrow
Solution Approach 1:
The patent applies dynamics by making the lens array electrically adjustable through electrowetting lens cells. The focal length of each micro-lens can be dynamically changed by applying voltage, allowing the system to adapt to different depth requirements. This resolves the contradiction by enabling both continuous viewing angle (through lateral shifting) and improved depth perception (through focal length adjustment), transforming a static optical system into a dynamic one that can accommodate multiple viewing conditions simultaneously
2Reliability
If holographic method is used, then 3D image is provided by interference between signal beam and reference beam, but high-cost laser and precise optical arrangement are required
Solution Approach 1:
The patent replaces the complex mechanical and optical interference system of holography with an electrowetting-based optical control system. Instead of using lasers and precise optical path arrangements, the invention uses electrically controlled liquid interface curvature changes in microlens arrays to achieve 3D image formation. This substitution dramatically simplifies the optical system while maintaining 3D image quality, eliminating the need for expensive lasers and complex optical alignments
Solution Approach 2:
The patent changes the operating parameters of the lens system by using electrowetting to dynamically adjust focal length and lens positioning. Rather than relying on fixed optical paths and interference patterns, the system varies focal parameters electrically to achieve 3D effects. This parameter-based control approach simplifies the overall system complexity while preserving image quality
3Reliability
If glasses type 3D display is used, then polarization or shutter effect provides 3D perception, but binocular parallax limits number of viewpoints and causes eye fatigue
Solution Approach 1:
The patent segments the viewing experience by using multiple independently controllable micro-lens elements in the electrowetting lens array. Each microlens can be individually adjusted to direct light from different depths to different spatial locations, creating multiple distinct viewpoints simultaneously. This segmentation allows the system to provide more than the traditional two viewpoints of binocular vision, increasing the number of available viewpoints and reducing eye fatigue through more natural multi-point convergence
4Manufacturing precision
If multiple display panels arrayed at intervals are used, then depth perception is improved, but device complexity and cost increase
Solution Approach 1:
The patent makes the single lens array universal by enabling it to perform multiple functions that would otherwise require separate components. The electrowetting lens array can simultaneously function as a focusing element, a positioning element, and a depth-modulating element. By electrically adjusting the focal length and position of microlenses, the system can generate images at multiple depths from a single panel, eliminating the need for multiple physically separated display panels while maintaining improved depth perception
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 electrowetting lens array enables increased depth perception and a wider viewing angle by accurately adjusting focal distances for multiple images, reducing user fatigue and improving the realism of 3D images displayed.
Implementation Method 1
an electrowetting lens array having an electrically adjustable variable focal distance
Data Source
AI summary
Provided are an integral imaging type 3-dimensional (3D) image display apparatus and a 3D image pickup apparatus for increasing a depth by using an electrowetting lens array. The 3D image display apparatus includes a display panel and an electrowetting lens array having an electrically adjustable variable focal distance. The 3D image display apparatus displays a plurality of images having different depths on different focal planes and thus a depth of a 3D image by using one display panel.