Pixel Electrode Layout for Display Device Stain Reduction
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Solution Overview
Problem
In display devices with light-emitting pixels, stains due to coupling between pixel electrodes and data lines can be visually recognized, affecting image quality, especially when pixel electrodes of different colors are affected by changes in data voltage.
Innovation Solution
The display device design includes varying pixel electrode configurations where some pixels overlap data lines, while others do not, resulting in different capacitances between the data lines and pixel electrodes, preventing visual recognition of stains by ensuring only certain pixels are affected by data voltage changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If pixel electrodes are positioned close to data lines to improve signal coupling, then data voltage changes affect pixel electrodes more strongly, but this causes visible stains and degrades image quality
Solution Approach 1:
The patent applies local quality by differentiating pixel electrode configurations based on their position relative to data lines. Some pixels (first and third) have pixel electrodes overlapping data lines for strong coupling, while other pixels (second) have pixel electrodes spaced apart to avoid coupling effects. This localized differentiation allows the system to exploit strong coupling where needed while avoiding harmful coupling effects in other regions.
2Productivity
If all pixels are configured with overlapping pixel electrodes to maximize coupling, then signal transmission is improved, but coupling-induced stains become visually apparent across the entire display area
Solution Approach 1:
The patent segments the pixel array into different groups based on their electrode configurations. First and third pixels are configured with overlapping pixel electrodes for efficient signal transmission, while second pixels are configured with spaced-apart electrodes to prevent coupling effects. This segmentation allows the display to achieve high signal transmission efficiency in critical regions while maintaining image quality uniformity by preventing stains in other regions.
Solution Approach 2:
The patent implements local quality by assigning different electrode configurations to different pixel types within the same display device. This allows optimized signal transmission in regions where it benefits image quality while preventing coupling-induced stains in regions where it would be visually apparent, thereby maintaining overall image quality uniformity.
3Object-affected harmful factors
If pixel electrodes are spaced apart from data lines to prevent coupling effects, then visual stains are prevented, but signal coupling strength is reduced
Solution Approach 1:
The patent applies local quality by differentiating pixel electrode configurations based on their position relative to data lines. Some pixels (first and third) have pixel electrodes overlapping data lines for strong coupling, while other pixels (second) have pixel electrodes spaced apart to avoid coupling effects. This localized differentiation allows the system to exploit strong coupling where needed while avoiding harmful coupling effects in other regions.
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 effectively prevents stains from being visually recognized in the display area by controlling the impact of data voltage changes on pixel electrodes, maintaining image quality by isolating the effect of coupling on specific color outputs.
Implementation Method 1
an area of the first pixel electrode may be larger than an area of the second pixel electrode, and an area of the third pixel electrode may be larger than an area of the first pixel electrode
Data Source
AI summary
A display device includes: a plurality of data lines extending in a first direction, and first to third pixels connected to the plurality of data lines. The first pixel includes a first pixel electrode overlapping the plurality of data lines in a plan view in a thickness direction. The second pixel includes a second pixel electrode spaced apart from the plurality of data lines in the plan view in the thickness direction. The third pixel includes a third pixel electrode overlapping the plurality of data lines in the plan view in the thickness direction.