Pixel Electrode Organic Layer Structure for Higher Aperture Displays
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Solution Overview
Problem
Existing electronic devices face challenges in increasing the aperture ratio of pixels and improving process yield while maintaining display quality, particularly in high-resolution displays where pixel area decreases.
Innovation Solution
The electronic device incorporates a substrate with a thin-film transistor, a transparent conductive layer, and organic layers, where the first organic layer has a through-hole and the second organic layer is disposed within it, with a specific distance relationship that enhances display quality without affecting the pixel aperture ratio, and a manufacturing method that includes forming these layers to improve yield and reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the resolution increases and pixel area decreases, then the display quality improves, but the aperture ratio decreases
Solution Approach 1:
The patent segments the pixel structure into multiple functional layers including first and second organic layers, transparent conductive layers, and electrode structures. This segmentation allows each layer to be optimized independently - the organic layers can be made thinner to increase aperture ratio while the segmented electrode structures maintain electrical functionality at higher resolutions.
Solution Approach 2:
The patent transitions from a planar pixel structure to a three-dimensional layered structure with vertical stacking of organic layers, transparent conductive layers, and electrodes. This dimensional change allows the aperture ratio to be increased in the horizontal plane while maintaining display quality through the vertical layering, effectively decoupling the trade-off between resolution and aperture ratio.
2Measurement precision
If the pixel area decreases, then the resolution increases, but the process yield decreases
Solution Approach 1:
The patent employs preliminary patterning actions where the first organic layer is formed with through-holes before depositing the transparent conductive layer and second organic layer. This preliminary structuring allows subsequent layers to be precisely aligned and deposited, maintaining high process yield even as pixel dimensions decrease and resolution increases.
Solution Approach 2:
The patent changes material parameters by using transparent conductive materials and organic materials with specific optical and electrical properties. These parameter changes allow the manufacturing process to maintain consistency and yield while scaling to smaller pixel sizes, as the material properties remain stable despite dimensional reductions.
3Area of stationary object
If the aperture ratio is increased, then the display quality improves, but the light leakage increases
Solution Approach 1:
The patent introduces transparent conductive layers and organic layers as intermediary structures between the electrodes and the display medium. These intermediary layers serve dual functions: they maintain electrical connectivity while providing optical control to prevent light leakage, allowing the aperture ratio to be increased without compromising display quality.
Solution Approach 2:
The patent uses composite material structures combining organic materials and transparent conductive materials in layered configurations. This composite approach allows optimization of both optical properties (to prevent light leakage) and electrical properties (to maintain aperture functionality), enabling higher aperture ratios without increasing light leakage.
4Reliability
If the organic layers are added to improve display quality, then the contrast and transmittance improve, but the device complexity increases
Solution Approach 1:
The patent designs the organic layers and transparent conductive layers to serve multiple functions simultaneously: electrical conduction, optical control, and structural support. This multi-functionality reduces the need for separate dedicated layers, thereby improving display quality while limiting the increase in overall device complexity.
Solution Approach 2:
The patent merges the functions of electrical conduction and optical control into the same transparent conductive layers and organic layers. By combining these functions rather than using separate layers, the patent improves display quality (contrast and transmittance) while minimizing the increase in structural complexity.
Data Source
AI summary
An electronic device is provided. The electronic device includes a substrate, a thin-film transistor, a transparent conductive layer, a first organic layer, and a second organic layer. The thin-film transistor is disposed on the substrate and includes a drain electrode. The transparent conductive layer is disposed on the drain electrode and is electrically connected to the drain electrode. The first organic layer is disposed between the drain electrode and the transparent conductive layer. The first organic layer has a through-hole. The second organic layer is disposed in the through-hole. The electronic device has a cell gap. There is a first distance between an upper surface of the first organic layer and an upper surface of the second organic layer. The cell gap and the first distance conform to the following formula: 0<the first distance≤0.8×the cell gap.