Paired Barrier Electrodes for 3D Display Parallax Control
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Solution Overview
Problem
The parallax barrier method in 3D display devices experiences moire interference due to the cyclic pattern of indium tin oxide (ITO) barrier electrodes, which complicates the manufacturing process and reduces transparency, leading to issues during both 2D and 3D image displays.
Innovation Solution
A three-dimensional display device with a parallax barrier panel featuring paired barrier electrodes on two substrates with an interlayer insulating film, where each pair is connected through specific through holes to simplify the wiring structure and eliminate gaps, reducing moire interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a two-layer barrier electrode structure is used to eliminate gaps and suppress moire, then moire interference is reduced, but the wiring configuration becomes complicated and manufacturing complexity increases
Solution Approach 1:
The barrier electrode is segmented into multiple independent transparent conductive oxide (TCO) layers instead of using a complex two-layer structure with metal electrodes. Each TCO layer can be independently formed and connected, simplifying the wiring configuration while effectively eliminating gaps between barrier electrodes to suppress moire interference
Solution Approach 2:
The invention changes the material parameter from metal-based transparent electrodes to transparent conductive oxide (TCO) materials. This parameter change enables the electrodes to be formed as thin films that can be easily patterned and connected through simple wiring structures, reducing manufacturing complexity while maintaining the ability to eliminate gaps and suppress moire
2Illumination intensity
If ITO barrier electrodes are used to form transparent electrodes, then transparency is achieved, but the ITO portions appear darker and have reduced transmission factor
Solution Approach 1:
The invention uses composite transparent conductive oxide structures, combining multiple TCO layers with different properties. This composite approach maintains high transparency while enabling effective barrier electrode functionality, overcoming the darkening effect of single-layer ITO electrodes
Solution Approach 2:
The invention changes the electrode material from conventional ITO to transparent conductive oxide (TCO) thin films with optimized thickness and composition parameters. This parameter optimization reduces the darkening effect and improves transmission factor while maintaining the cyclic barrier electrode pattern functionality
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 configuration simplifies the manufacturing process, reduces production costs, and enhances the reliability of the 3D display device by maintaining high transparency and supporting multiple parallax levels without the need for complex multilayer wiring.
Implementation Method 1
The parallax barrier panel using liquid crystal offers the advantage of presenting image display when impressed with a barrier signal for driving the liquid crystal and providing 2D image display when not impressed with the barrier signal
Data Source
AI summary
A parallax barrier panel including a first substrate having a flat electrode, and a second substrate, the liquid crystal sandwiched therebetween. The second substrate has first barrier electrodes extending in a first direction and arrayed at a first pitch in a second direction, and has second barrier electrodes, the first and the second harrier electrodes having an interlayer insulating film interposed therebetween. Gaps between the first barrier electrodes are blocked by the second barrier electrodes when viewed in a plan view. Each of the first barrier electrodes is paired with one of the second barrier electrodes. Bus electrodes extend outside the display area along a side thereof. The first barrier electrodes are connected to the bus electrodes via first through holes formed in the interlayer insulating film. The second barrier electrodes are connected to the first barrier electrodes via second through holes formed in the interlay insulating film.