OLED Substrate Barrier Structure for Ink Isolation
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Solution Overview
Problem
The manufacturing of large-sized organic light emitting diode (OLED) substrates faces challenges with the evaporation process, such as mask deformation at high temperatures, and the solution process, where ink layers can be difficult to control, leading to residual organic film layers in non-display areas that complicate cleaning and damage other components.
Innovation Solution
An organic light emitting diode substrate with a barrier structure in non-display areas to prevent ink and organic film layers from contacting surfaces, using protrusions or retaining walls to isolate these areas from the ink layer, ensuring the organic film layer is not formed in these regions, thereby facilitating easy removal and improving product quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the evaporation process is used to manufacture organic film layers, then the manufacturing precision can be improved, but the device complexity increases due to mask deformation at high temperatures
Solution Approach 1:
The patent extracts the organic film layer formation process from the high-temperature evaporation process and implements it separately using solution process ink jet printing. This separates the two processes, allowing the organic film layer to be formed without mask deformation issues while maintaining manufacturing precision through digital printing control.
Solution Approach 2:
The patent replaces the mechanical mask system used in evaporation processes with a digital printing system. The ink jet printing technology uses digital patterns and material deposition control instead of physical masks, eliminating mask deformation and offset problems while achieving precise organic film layer formation.
2Ease of manufacture
If the solution process is used to manufacture organic film layers, then the ease of manufacture is improved, but the object-affected harmful factors increase due to residual organic film layers in non-display areas
Solution Approach 1:
The patent segments the substrate into display regions and non-display regions, and controls the organic film layer formation to occur only in display regions through precise ink jet printing. This segmentation prevents residual organic film layers from forming in non-display areas, eliminating contamination issues while maintaining ease of manufacture for large-sized substrates.
Solution Approach 2:
The patent introduces a barrier layer as an intermediary between the substrate and the organic film layer in non-display areas. This barrier layer prevents the organic film layer from contacting and contaminating the substrate surface in non-display regions, while allowing the solution process to continue for ease of manufacture.
3Manufacturing precision
If the ink layer is formed by ink jet printing, then the manufacturing precision is improved, but the device complexity increases due to the need for barrier structures
Solution Approach 1:
The patent implements preliminary action by forming the barrier layer structure before depositing the organic film layer. This pre-formed barrier layer prevents the need for complex real-time control mechanisms during printing, as the barrier structure is already in place to guide and contain the ink layer within display regions, reducing overall 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 barrier structure effectively prevents the ink and organic film layers from entering non-display areas, allowing for easy removal and avoiding damage to other components, thus enhancing the quality and reliability of the OLED substrate.
Implementation Method 1
the protrusion is made of a material that is lyophobic relative to the ink layer
Data Source
AI summary
The present disclosure discloses an organic light emitting diode substrate and a method for manufacturing the same. In one embodiment the present disclosure, an organic light emitting diode substrate includes a display region in which an organic film layer that is formed by curing an ink layer is provided, and a border region located outside the display region and including an exposed area in which no organic film layer is provided. The organic light emitting diode substrate further includes: a barrier structure located in the border region and adapted for preventing the ink layer from coming into contact with a surface of the exposed area.