Switchable Autostereoscopic Display With Segmented Electrodes
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Solution Overview
Problem
Existing autostereoscopic display devices face a trade-off between horizontal resolution and stereoscopic viewing, with current switchable lenticular arrays being complex and prone to manufacturing issues due to the need for multiple electrodes and complicated electrode structures, which affects optical quality and manufacturing compatibility.
Innovation Solution
A simplified beam shaping device with a single layer structure and at most 8 electrodes, where electrode lines are shared and only 2-3 different voltages are required, reducing complexity and improving optical performance by optimizing electrode width and orientation based on the liquid crystal molecule alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a switchable lenticular array with multiple electrodes and complicated electrode structures is used to provide stereoscopic views, then the stereoscopic viewing capability is improved, but the device complexity increases and manufacturing precision deteriorates
Solution Approach 1:
The electrode structure is segmented into a first set of electrode lines extending in a first direction and a second set of electrode lines extending in a second direction, allowing independent control of different regions of the liquid crystal layer to achieve beam shaping with reduced overall complexity
Solution Approach 2:
The patent transitions from conventional single-direction electrode arrangements to a two-dimensional grid of electrode lines extending in perpendicular directions, enabling precise control of liquid crystal orientation in multiple dimensions to achieve complex beam shaping functions with simpler individual electrode elements
2Adaptability or versatility
If a switchable lenticular array with multiple electrodes and complicated electrode structures is used to provide stereoscopic views, then the stereoscopic viewing capability is improved, but the manufacturing precision deteriorates
Solution Approach 1:
The electrode structure is segmented into a first set of electrode lines extending in a first direction and a second set of electrode lines extending in a second direction, allowing independent control of different regions of the liquid crystal layer to achieve beam shaping with reduced overall complexity
Solution Approach 2:
Different regions of the liquid crystal layer are controlled by different electrode line intersections, allowing local adjustment of refractive index gradients to optimize optical quality in different areas of the display device
3Adaptability or versatility
If conventional beam shaping devices are used to provide stereoscopic views, then the stereoscopic viewing capability is improved, but the horizontal resolution deteriorates
Solution Approach 1:
The display device dynamically switches between 2D display mode and 3D multiview mode by controlling the liquid crystal molecules between different alignment states, allowing the same physical structure to serve multiple functions without permanent resolution loss
Solution Approach 2:
The refractive index of the liquid crystal layer is changed by applying different voltages to the electrode lines, transforming the beam shaping properties to switch between 2D and 3D modes while maintaining high horizontal resolution in both modes
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 enables efficient switching between 2D and 3D modes with improved optical quality and reduced manufacturing complexity, maintaining high resolution in both modes while providing stereoscopic views without the need for additional viewing aids.
Implementation Method 1
This alignment can be controlled by applying an electric field thereto. The reorientation of the liquid crystal molecules results in a refractive index gradient, which leads to a light ray passing through the liquid crystal cell being redirected.
Implementation Method 2
The reorientation of the liquid crystal molecules results in a refractive index gradient, which leads to a light ray passing through the liquid crystal cell being redirected.
Implementation Method 3
WO 2008/126049 discloses a beam shaping device which uses first and second in-plane electrodes, which generate an in-plane electric field.
Data Source
AI summary
A 2D-3D switchable autostereoscopic display device has an imaging arrangement (109) electrically switchable between a 2D mode and a 3D mode, which comprises in-plane switching electrodes comprising coplanar parallel electrode lines. The electrode lines are arranged as a plurality of sets of parallel lines, each set defining a lenticular lens area. Each set comprises first electrode lines at the opposite boundaries between the lens area and adjacent lens areas, and at least a first pair of electrode lines disposed between the opposite boundaries and symmetrical about the centre of the lens area, wherein each set comprises at most six electrode lines between the opposite boundaries. This provides an electrode layout which is simple to manufacture and yet has been found to provide good optical lens quality.