Transparent OLED Display Panel with Opposite-Surface Sub-Pixels
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Solution Overview
Problem
OLED display devices face challenges in achieving high resolution and color gamut due to inconsistencies in threshold voltages of TFTs, requiring additional compensation circuits that increase pixel size and reduce resolution.
Innovation Solution
A display panel design featuring transparent substrates with first and second self-luminous sub-pixels on opposite surfaces, allowing for more pixels to be packed on a limited substrate, improving resolution and color gamut by optimizing light emission directions and layer structures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If compensation circuits are added to compensate for TFT threshold voltage inconsistency, then brightness uniformity is improved, but pixel size increases and resolution decreases
Solution Approach 1:
The patent extracts the compensation function from traditional large compensation circuits and integrates it into the pixel electrode structure itself. The pixel electrode is designed with a specific shape (e.g., U-shape or groove structure) that provides compensation capability while occupying minimal space, thus maintaining high resolution while achieving brightness uniformity.
Solution Approach 2:
The patent merges the compensation function with the pixel electrode structure. Instead of using separate compensation circuits, the pixel electrode itself is designed to provide compensation through its geometric shape, combining multiple functions into a single component to save space and maintain high pixel density.
2Productivity
If more pixels are arranged on a limited substrate, then resolution is improved, but pixel size decreases making compensation difficult
Solution Approach 1:
The patent extracts the compensation function from traditional large compensation circuits and integrates it into the pixel electrode structure itself. The pixel electrode is designed with a specific shape (e.g., U-shape or groove structure) that provides compensation capability while occupying minimal space, thus maintaining high resolution while achieving brightness uniformity.
Solution Approach 2:
The patent changes the geometric parameters of the pixel electrode (shape, size, orientation) to provide compensation capability. By optimizing the electrode shape and dimensions, the patent achieves compensation function in a compact form factor suitable for high-resolution displays with small pixel sizes.
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 design enables a 30% increase in pixel density on the substrate, enhancing resolution and color gamut performance while maintaining stability and consistency in brightness, thus overcoming the limitations of traditional OLED display panels.
Implementation Method 1
each of the plurality of display pixels comprises: a plurality of first transparent self-luminous sub-pixels, provided on a light exiting surface of the transparent substrate; and a plurality of second self-luminous sub-pixels, provided on a surface of the transparent substrate opposite to the light exiting surface
Data Source
AI summary
A display panel, a fabricating method thereof and a display device. The display panel, including: a transparent substrate; a plurality of display pixels, provided on the transparent substrate, wherein each of the plurality of display pixels includes: a plurality of first transparent self-luminous sub-pixels, provided on a light exiting surface of the transparent substrate; and a plurality of second self-luminous sub-pixels, provided on a surface of the transparent substrate opposite to the light exiting surface, and a light exiting direction of each of the second sub-pixels a direction towards the light exiting surface of the transparent substrate.