OLED Panel Hydrophobic Trenches for Device Isolation
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Solution Overview
Problem
In manufacturing organic light-emitting display panels, adjacent organic light-emitting devices often form a connected structure due to ink-jet printing, leading to mutual influence and decreased display effect.
Innovation Solution
The implementation of a hydrophobic layer with trenches in the planarization layer between organic light-emitting devices, which breaks the organic light-emitting function layer at each trench, preventing connection and allowing independent control of devices within pixel apertures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If ink-jet printing is used to manufacture organic light-emitting function layers, then manufacturing efficiency is improved, but adjacent organic light-emitting devices become connected and cannot be independently controlled
Solution Approach 1:
The patent introduces grooves between adjacent organic light-emitting devices that divide the pixel defining layer into separate regions. This segmentation prevents the organic light-emitting function layers of adjacent devices from connecting to each other during ink-jet printing, while still allowing efficient manufacturing of multiple devices simultaneously within each pixel aperture.
Solution Approach 2:
The patent applies different structural characteristics to different regions: the pixel defining layer has openings for light emission, while the regions between adjacent devices have grooves for isolation. This local differentiation allows the organic light-emitting function layers to be printed efficiently across the entire pixel aperture while maintaining independence between adjacent devices through the groove-based separation.
2Measurement precision
If multiple organic light-emitting devices are disposed in one pixel aperture, then display resolution is improved, but adjacent devices influence each other and display effect deteriorates
Solution Approach 1:
The grooves in the pixel defining layer segment the pixel aperture into multiple independent regions, each containing an organic light-emitting device. This allows multiple devices to be disposed in one pixel aperture for high-resolution display while preventing mutual influence between adjacent devices through the isolating grooves.
Solution Approach 2:
The grooves act as intermediary structures between adjacent organic light-emitting devices. They provide physical separation and isolation, preventing the organic light-emitting function layers from connecting while still allowing the devices to be manufactured together in the same pixel aperture, thus maintaining both high resolution and display quality.
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 solution effectively improves the display effect and human perception by preventing mutual influence between adjacent organic light-emitting devices, enhancing resolution and color accuracy.
Implementation Method 1
filling each of the plurality of grooves with a hydrophobic material to form a hydrophobic layer
Data Source
AI summary
The present disclosure provides organic light-emitting display panel, manufacturing method, and organic light-emitting display device. Organic light-emitting display panel includes: array substrate, planarization layer, pixel defining layer, and multiple organic light-emitting devices. The pixel defining layer has multiple pixel apertures, each of which is provided therein with at least two organic light-emitting devices for emitting a same color. Anodes of the organic light-emitting devices are one-to-one electrically connected to pixel driving circuits on the array substrate. The planarization layer is provided with multiple grooves, which are disposed between any adjacent two organic light-emitting devices in each pixel aperture and are filled with hydrophobic layer. The hydrophobic layer is provided with multiple trenches. Extending direction of each groove is the same as extending direction of each trench. The organic light-emitting function layer breaks at each trench. The present disclosure can improve display effect of organic light-emitting display panel.