Transparent Spacer Layer for Display Panel Thickness Uniformity
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Solution Overview
Problem
Current display panels face inconsistencies in thickness due to the need for a color conversion layer on green and blue pixels, leading to reduced display performance.
Innovation Solution
A display panel design with a transparent spacer layer between the driving substrate and cover plate maintains a consistent distance, allowing for varying pixel heights and ensuring uniform thickness, which includes a pixel definition layer with opening regions for light-emitting units and a color conversion layer on select pixels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a color conversion layer is fabricated on green and blue pixels, then color display capability is improved, but thickness uniformity deteriorates
Solution Approach 1:
The patent introduces a transparent spacer layer as a fourth dimension element between the substrate and cover plate, creating a new spatial dimension to compensate for height differences caused by color conversion layers. This spacer layer fills the vertical space gap, transforming the thickness non-uniformity problem into a controllable spacing issue that can be resolved through the spacer's thickness design.
Solution Approach 2:
The transparent spacer layer acts as an intermediary element between the pixel array (with varying heights) and the cover plate. It mediates the height differences by providing a compensating layer that ensures uniform overall thickness, allowing the color conversion layers to remain on green and blue pixels without compromising thickness uniformity.
2Productivity
If pixel heights are made different to accommodate color conversion layers, then color conversion efficiency is improved, but structural consistency deteriorates
Solution Approach 1:
The patent applies local quality by allowing different pixel types (green and blue) to have color conversion layers only where needed, while red pixels remain without them. The transparent spacer layer then provides uniform compensation across all pixels, maintaining local functional differences while achieving global structural consistency.
3Manufacturing precision
If a transparent spacer layer is added to maintain consistent distance, then thickness uniformity is improved, but device complexity increases
Solution Approach 1:
The transparent spacer layer serves multiple functions simultaneously: it maintains uniform thickness, provides mechanical support, ensures proper spacing for light emission, and compensates for height variations. This multi-functionality reduces the need for additional separate components, thereby limiting the increase in device complexity.
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
The solution results in improved display performance by maintaining uniform thickness and enhancing light output, preventing electrode short-circuiting and improving the structural integrity of the panel.
Implementation Method 1
a transparent spacer layer is disposed between the body portion and the cover plate, and the transparent spacer layer is configured to maintain a distance between the driving substrate and the cover plate to be consistent
Implementation Method 2
each of the light-emitting units includes a plurality of pixels, the pixels are disposed in the opening regions
Implementation Method 3
sequentially fabricating a first electrode and a light-emitting diode in the opening regions
Data Source
AI summary
A display panel, a manufacturing method thereof, and an electronic device are provided. The display panel includes a pixel definition layer which has a plurality of opening regions disposed on a driving substrate, and a plurality of light-emitting units including a plurality of pixels disposed in the opening regions, wherein at least two of the pixels in each of the light-emitting units have different heights, a cover plate is disposed opposite to the driving substrate, and a transparent spacer layer is disposed between a body portion and the cover plate.