Optical Panel Electrode Layout for Uniform Transparent Display
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Solution Overview
Problem
Transparent display panels face interference from strong background light, which affects the clarity of the image displayed, making it difficult for users to view the image clearly.
Innovation Solution
The optical panel design includes a first and second substrate with a display medium layer, a metal wire pattern, insulating layer, and transparent electrodes, where the metal wire pattern extends from the peripheral area to the central active area with through holes to ensure even current distribution and simultaneous color change across the display medium layer, and an optional metal mesh for uniform voltage distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a transparent display panel uses an array of light-emitting diodes with a transmissive area, then the display can show images while allowing background visibility, but the transmitted light from the back surface interferes with the displayed image clarity
Solution Approach 1:
The patent segments the substrate into multiple regions with different optical properties: a first region with higher light transmission for background visibility and a second region with lower light transmission for reduced background light interference. This spatial segmentation allows different parts of the display to serve different functions simultaneously.
Solution Approach 2:
The patent applies local quality by creating regions with different light transmission characteristics within the same substrate. The first region has higher transmittance for background areas while the second region has lower transmittance for display areas, optimizing both background visibility and image clarity in their respective locations.
2Manufacturing precision
If the metal wire pattern extends from the peripheral area to the central portion of the active area, then the current distribution becomes even and color change occurs simultaneously across the display medium layer, but the insulating layer must be removed or thinned in the central area creating a through hole
Solution Approach 1:
The patent performs preliminary action by pre-designing the insulating layer thickness variation and through hole formation in the central region before final assembly. This allows the metal wire pattern to be properly connected to the transparent electrode without requiring complex post-processing modifications.
Solution Approach 2:
The patent extracts the insulating layer material in the central portion of the active area to create a through hole, removing the obstacle that would prevent electrical connection between the metal wire pattern and the transparent electrode, thereby enabling uniform current distribution.
3Reliability
If the insulating layer is made thin or has a through hole in the central area to enable electrical connection, then the metal wire pattern can connect to the transparent electrode, but the structural integrity and insulation of the insulating layer is compromised
Solution Approach 1:
The insulating layer is designed with local quality variations: it is thicker in the peripheral area to maintain structural integrity and insulation, while being thinner or having a through hole in the central area to enable necessary electrical connections. This localized modification maintains overall reliability while enabling 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 design enhances the clarity of the image displayed by reducing the impact of background light and ensuring consistent color change times across the panel, improving user experience by maintaining image visibility and uniformity.
Implementation Method 1
the second transparent electrode is located between the second carrier and the first carrier and overlaps the first transparent electrode. The display medium layer is located between the first transparent electrode and the second transparent electrode
Data Source
AI summary
An optical panel includes a first substrate, a second substrate, and a display medium layer. The first substrate includes a first carrier having active and peripheral areas, a first metal wire pattern extending from the peripheral area to a central portion of the active area, a first insulating layer, and a first transparent electrode. The first insulating layer is located on the first carrier and the first metal wire pattern and has a first through hole overlapping the central portion. A portion of the first metal wire pattern is located below the first through hole. The first transparent electrode overlaps the active area entirely and is electrically connected to the first metal wire pattern. The second substrate has a second carrier and a second transparent electrode overlapping the first transparent electrode. The display medium layer is located between the first transparent electrode and the second transparent electrode.