Electro-expandable spacers for OLED display alignment
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Solution Overview
Problem
OLED display panels experience misalignment and display abnormalities when bent due to deformation and displacement between the light-emitting element layer and the color filter layer.
Innovation Solution
Incorporating electro-expandable pieces between adjacent color filters that expand when the display panel is bent, increasing the spacing between color filters and reducing deformation and displacement, thereby maintaining alignment and improving display quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the display panel is bent, then flexibility and adaptability are improved, but misalignment and display abnormalities occur due to deformation and displacement between layers
Solution Approach 1:
The spacer structure is designed to be dynamically adjustable through electrostatic actuation. When voltage is applied between the first and second electrodes, the spacer expands or contracts to change the distance between color filters, allowing the structure to adapt to bending deformations while maintaining alignment precision.
Solution Approach 2:
The physical state of the spacer material changes in response to electrostatic fields. By changing the electrical parameter (applying voltage), the dimensional parameter (distance between color filters) is adjusted, enabling the system to maintain alignment under different bending conditions.
2Reliability
If the distance between adjacent color filters is increased, then deformation and displacement during bending are reduced, but the device complexity increases
Solution Approach 1:
The spacer acts as an intermediary element between adjacent color filters. This simple intermediate structure enables controlled distance adjustment and stress distribution during bending, improving alignment stability without significantly complicating the overall device architecture.
Solution Approach 2:
The patent replaces complex mechanical adjustment mechanisms with an electrostatic actuation system. By using electric fields to control the spacer expansion, the system achieves precise distance control and alignment stability with simpler structure compared to traditional mechanical adjustment systems.
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 use of electro-expandable pieces effectively reduces the deformation and displacement of color filters during bending, preventing misalignment and improving the display effect and quality of the OLED display panel.
Implementation Method 1
a plurality of electro-expandable pieces are each disposed between the respective adjacent color filters and operative to expand when the display panel is bent
Data Source
AI summary
A display panel and a display device are disclosed. The display panel includes a substrate, a light-emitting element layer, a pixel defining layer, an encapsulation layer, a color filter layer, and multiple electro-expandable pieces. The light-emitting layer includes multiple light-emitting elements arranged in an array on the substrate. Every two adjacent light-emitting elements are separated by the pixel defining layer. The encapsulation layer is disposed on the light-emitting elements and the pixel defining layer. The color filter layer is disposed on the encapsulation layer, and includes multiple color filters, which are arranged in one-to-one correspondence with the light-emitting elements. The multiple electro-expandable pieces are each disposed between the respective adjacent color filters and operative to expand when the display panel is bent so that a distance between the respective adjacent color filters becomes larger.