Edge Sub-Pixel Width Reduction for Organic Light-Emitting Displays
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Solution Overview
Problem
Conventional organic light-emitting display apparatuses suffer from defects such as perceived lines at the edges due to sub-pixel patterns, which degrade picture quality.
Innovation Solution
The apparatus employs edge sub-pixel lines with reduced widths compared to center sub-pixel lines of the same color, and utilizes light-blocking layers, auxiliary electrode layers, or sealing materials to adjust and minimize external emission widths, preventing line perception.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If sub-pixels are arrayed in stripe patterns to facilitate manufacturing, then manufacturing ease is improved, but picture quality deteriorates due to perceived lines at edges
Solution Approach 1:
The patent applies different widths to sub-pixel lines at different locations: edge sub-pixel lines have a first width while center sub-pixel lines have a second width. This local differentiation eliminates the perceived lines at edges without changing the overall stripe pattern manufacturing approach, thus maintaining manufacturing ease while improving picture quality.
2Device complexity
If edge sub-pixel lines have the same width as center sub-pixel lines, then manufacturing simplicity is improved, but line perception defects occur
Solution Approach 1:
The patent introduces asymmetry in the sub-pixel line widths: edge sub-pixel lines have a different width than center sub-pixel lines. This asymmetric design specifically targets and eliminates the perceived lines at edges, improving optical characteristics while maintaining reasonable structural simplicity.
3Manufacturing precision
If uniform sub-pixel widths are used throughout the display, then manufacturing precision is improved, but edge line defects are generated
Solution Approach 1:
The patent applies local quality by making edge sub-pixel lines have a different width than center sub-pixel lines. This local variation eliminates the perceived lines at edges that would otherwise be generated by uniform width sub-pixels, thereby removing the harmful edge line defects while maintaining good manufacturing precision.
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 enhances picture quality by eliminating edge line defects and improving optical characteristics.
Implementation Method 1
When a voltage is applied to the electrodes, the organic light-emitting layer, which is electrically connected to the electrodes, emits visible light
Data Source
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AI summary
An organic light-emitting display apparatus including first and second edge sub-pixel lines disposed at opposing side edges of the apparatus and centre sub-pixel lines disposed therebetween, each for emitting a single colour of light. An external emission width of the first edge sub-pixel line is less than an external emission width of the centre sub-pixel lines that emit the same colour. An external emission width of the second edge sub-pixel line is less than the width of the centre sub-pixel lines that emit the same colour.