Organic Light-Emitting Display Device Color Dispersion Reduction
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Solution Overview
Problem
Organic light-emitting display devices face issues with color dispersion due to interference between colored lights from subpixels, leading to undesirable color separation, and they typically require a polarizing plate to prevent external light interference, increasing production costs.
Innovation Solution
The design includes a substrate with first and second conductive lines, a pixel electrode overlapping these lines, and an overcoat layer with specific thickness variations to minimize the distance between conductive lines and the pixel electrode, reducing color separation and eliminating the need for a polarizing plate by optimizing the distance between conductive lines and the pixel electrode.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the distance between conductive lines is reduced to minimize color separation, then color dispersion is reduced, but manufacturing precision requirements increase
Solution Approach 1:
An insulating layer is introduced as an intermediary between the first and second conductive lines. This mediator allows the lines to be positioned very close together (0-10 μm) while maintaining electrical insulation, thus reducing color separation without requiring extremely precise manufacturing tolerances for direct contact prevention
Solution Approach 2:
The solution moves from controlling horizontal distance alone to a three-dimensional approach by adding vertical insulation layers. The conductive lines are arranged in different vertical levels with insulating layers between them, allowing close horizontal spacing while preventing electrical interference through vertical separation
2Object-affected harmful factors
If a polarizing plate is added to prevent external light interference, then display quality improves, but production cost increases
Solution Approach 1:
The patent extracts and removes the polarizing plate from the display structure entirely. Instead of adding this external component, the solution addresses external light interference through the intrinsic arrangement of conductive lines and insulating layers that minimize color dispersion, thereby eliminating the need for additional expensive components
Solution Approach 2:
The display structure becomes self-sufficient by using its own internal components (conductive lines and insulating layers) to prevent color dispersion and external light interference. The close-spaced conductive lines with insulating layers create a structure that inherently resists color separation without requiring external polarizing plates
Data Source
AI summary
An organic light-emitting display device having reduced color dispersion effects includes a substrate, a first conductive line disposed on the substrate, a second conductive line disposed on the same layer as the first conductive line and insulated from the first conductive line and a pixel electrode disposed on the first and second conductive lines and overlapping the first and second conductive lines. A distance between the first conductive line and the second conductive line is about 0 to 10 μm.