Liquid Light-Emitting Substrate With Electrode Pairs
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Solution Overview
Problem
Liquid light-emitting devices face issues with non-uniform light emission and material aggregation due to surface tension gradients and gravity, leading to luminance uniformity problems in display devices.
Innovation Solution
A substrate design with electrode pairs creating an electric field that redistributes surface tension in the liquid light-emitting layer, preventing material aggregation and ensuring uniform emission by adjusting the contact angle and curvature of the liquid surface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If liquid light-emitting material is used in the display device, then flexibility and manufacturability are improved, but non-uniform light emission and material aggregation occur due to surface tension gradients and gravity
Solution Approach 1:
The pixel defining layer with through holes is prepared in advance to provide a structured container for the liquid light-emitting material. The through holes are pre-formed with specific dimensions and positions to control liquid distribution before the liquid material is applied, preventing aggregation and ensuring uniform emission.
Solution Approach 2:
The liquid light-emitting material is confined to specific through holes in the pixel defining layer, creating localized emission regions. Each through hole acts as an independent chamber that maintains uniform liquid distribution through its controlled geometry, ensuring consistent luminance across different pixels while allowing flexibility in the overall device structure.
2Manufacturing precision
If electrode pairs are disposed on the hole wall to create electric field, then light emission uniformity is improved by redistributing surface tension, but device complexity increases
Solution Approach 1:
The pixel defining layer serves multiple functions: it defines pixel boundaries, provides through holes for liquid material containment, and supports the electrode pairs for electric field generation. This multi-functionality reduces the need for separate components, maintaining simplicity while achieving uniform light emission through the integrated structure.
Solution Approach 2:
Instead of using mechanical methods to distribute liquid material uniformly, the patent employs an electric field generated by electrode pairs to redistribute surface tension and achieve uniform liquid distribution. This substitution of mechanical distribution with electric field control simplifies the overall system while improving emission uniformity.
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 ensures uniform light emission and prevents material aggregation, maintaining luminance consistency across the display device.
Implementation Method 1
Liquid light-emitting devices face issues with non-uniform light emission and material aggregation due to surface tension gradients
Implementation Method 2
A substrate design with electrode pairs creating an electric field that redistributes surface tension in the liquid light-emitting layer
Implementation Method 3
The liquid functional layer includes a liquid light-emitting layer configured to emit light
Data Source
AI summary
A substrate includes a base, a pixel defining layer, a plurality of electrode pairs, and a plurality of light-emitting devices. The pixel defining layer is disposed on the base, and includes a plurality of through holes. At least one electrode pair includes a first electrode and a second electrode that are disposed at least on a hole wall of one of the through holes and at least partially opposite to each other, and the first electrode and the second electrode are insulated from each other. One of the plurality of light-emitting devices includes a liquid functional layer disposed in the through hole. The liquid functional layer is in direct contact with the first electrode and the second electrode. The liquid functional layer includes a liquid light-emitting layer configured to emit light.