Auxiliary Electrode Design for High-Transmittance Display Areas
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Solution Overview
Problem
Existing display apparatuses struggle to achieve high transparency while displaying images, as the transmittance in the transmission area is limited, preventing objects behind the display from being clearly visible.
Innovation Solution
A display apparatus design that includes a pixel area with sub-pixel electrodes and intermediate layers, and an adjacent transmission area with an auxiliary electrode that increases transmittance by allowing light to pass through, while maintaining image display capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the transmittance in the transmission area is increased to enhance transparency, then the transparency of the display apparatus is improved, but the structural complexity increases due to additional electrodes and layers
Solution Approach 1:
The display apparatus is divided into distinct pixel areas and transmission areas, with further segmentation of electrodes into sub-pixel electrodes, opposite electrodes, and auxiliary electrodes. This segmentation allows the transmission area to have optimized transmittance while the pixel areas maintain image display functionality, resolving the contradiction between transparency and structural complexity by localizing complexity only where necessary.
Solution Approach 2:
The auxiliary electrode structure serves multiple functions: it enhances transmittance in the transmission area while simultaneously maintaining electrical connectivity across different areas through its extension beyond the pixel area. This multi-functionality allows a single structural element to address both transparency requirements and electrical functionality, reducing the need for additional separate components.
2Illumination intensity
If the transmittance in the transmission area is increased to allow objects behind to be visible, then the transparency is improved, but the manufacturing precision requirements increase
Solution Approach 1:
The auxiliary electrode is designed to extend beyond the pixel area in advance, creating overlapping regions that facilitate electrical connectivity before final assembly. This preliminary positioning of electrodes ensures proper alignment and connection during manufacturing, reducing the precision requirements for subsequent assembly steps while maintaining high transmittance in the transmission area.
Solution Approach 2:
The auxiliary electrode acts as an intermediary structure that bridges the pixel area and transmission area, providing a transition zone that simplifies manufacturing. By extending the auxiliary electrode beyond the pixel area, it creates an overlapping region that serves as a buffer for alignment tolerances, making the manufacturing process more forgiving while still achieving the desired high transmittance.
Data Source
AI summary
A display apparatus includes a pixel area and an adjacent transmission area, first to third sub-pixel electrodes disposed on a substrate, disposed in the pixel area, and spaced apart from each other, a bank layer overlapping an edge of each of the first to third sub-pixel electrodes, first to third intermediate layers respectively disposed on the first to third sub-pixel electrodes and spaced apart from each other, first to third opposite electrodes respectively disposed on the first to third intermediate layers and spaced apart from each other, and an auxiliary electrode disposed on the bank layer. The first to third opposite electrodes respectively pass through edges of the first to third intermediate layers and electrically contact the auxiliary electrode.