Display Panel Encapsulation With Piezoelectric Deformation Detection
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Solution Overview
Problem
Existing display panels suffer from inaccurate detection of light leakage and deformation during the assembly process, leading to poor encapsulation quality and high repair rates due to the limitations of conventional detection methods, which are influenced by probe size and performance.
Innovation Solution
Incorporating a deformation detection means with a piezoelectric module and electro-display module into the display panel, where piezoelectric units generate electrical signals upon deformation, exciting electro-display units to display the deformation, allowing real-time detection and adjustment of the encapsulation process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional sensor detection method with fixed probe size is used, then the detection process is simple, but the detection accuracy is poor due to inability to detect local light leakage accurately
Solution Approach 1:
The patent divides the detection area into multiple regions by arranging multiple sensors in arrays along the edges of the display screen. Each sensor monitors a specific segment of the edge, enabling localized detection of light leakage. This segmentation allows accurate identification of deformation positions while maintaining a relatively simple overall system structure.
2Area of stationary object
If probe size is increased to cover larger testing area, then the detection coverage is improved, but the ability to detect local light leakage is reduced
Solution Approach 1:
Instead of using a single large probe, the patent employs multiple small sensors arranged in arrays. This segmentation strategy provides both wide coverage through multiple detection points and high precision through localized measurement at each sensor position, effectively resolving the contradiction between coverage area and detection precision.
Solution Approach 2:
The patent transitions from point-based detection to area-based detection by arranging sensors in two-dimensional arrays along the edge regions. This dimensional expansion allows simultaneous coverage of large areas while maintaining the precision of individual sensor measurements through spatial distribution.
3Ease of repair
If deformation detection is performed only after assembly, then the detection process is simple, but the repair efficiency is low due to inability to detect deformation during encapsulation
Solution Approach 1:
The patent implements preliminary deformation detection during the encapsulation process itself, before final assembly is completed. The sensor arrays are positioned to detect deformation as it occurs during encapsulation, allowing immediate identification and correction of issues. This preliminary detection significantly improves repair efficiency by catching problems early while the structure is still accessible and modifiable.
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
Ensures timely detection of deformations, improving encapsulation quality, reducing repair rates, and enhancing the display effect while maintaining low production costs.
Implementation Method 1
a piezoelectric module, arranged on a surface of at least one deformable functional layer in the display main body... when the deformable functional layer is deformed, the two adjacent piezoelectric units can contact each other to generate a pressure signal which is converted into an electrical signal
Data Source
AI summary
A display panel and a preparation method thereof, and a display device. The display panel includes a display main body, which includes a display area and an encapsulation area, and the display panel further has deformation detection elements, including: an electro-display module having one or more electro-display units, and a piezoelectric module positioned on a surface of at least one deformable functional layer in the display main body, and positioned in the encapsulation area. The piezoelectric module includes two or more piezoelectric units disposed at intervals on the surface of the deformable functional layer, and a voltage difference is applied between two adjacent piezoelectric units. An electro-display unit is connected in series between the two adjacent piezoelectric units. The display panel can detect in real time whether deformation occurs through the deformation detection means, thereby ensuring the encapsulation quality and display effect.