Electrostriction Parts for Dynamic Substrate Spacing Control
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Solution Overview
Problem
In liquid crystal display panels, maintaining a uniform distance between substrates is challenging due to variations in external forces, leading to potential defects like gravity mura and non-uniform display quality.
Innovation Solution
A display panel design featuring electrostriction parts on electrodes with a control module that adjusts voltage between electrodes to extend or retract electrostriction parts, matching with spacers to maintain a uniform distance, using materials like nano-barium titanate or ceramics, and detecting capacitance changes to determine force reception locations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If spacers are used to maintain distance between substrates, then the substrate spacing is maintained, but the display quality becomes non-uniform due to external forces causing gravity mura
Solution Approach 1:
The patent introduces electrostriction parts that can dynamically adjust their length in response to external forces. When gravity or other forces cause substrate deformation, the electrostriction parts extend or retract to maintain uniform spacer height, transforming a static spacing system into a dynamic one that adapts to changing conditions and prevents gravity mura defects
Solution Approach 2:
The electrostriction parts change their physical dimension (length) in response to voltage changes. By applying different voltages to the electrostriction parts in different regions, the system adjusts the supporting force parameters to compensate for external forces, thereby maintaining uniform display quality across the screen
2Manufacturing precision
If electrostriction parts are added to adjust supporting force, then display quality uniformity is improved, but device complexity increases
Solution Approach 1:
The patent combines multiple functions into the electrostriction parts: they serve as both the actuator for adjustment and the supporting element itself. The electrostriction parts are integrated with the electrode structure, merging the spacing maintenance function with the electrostriction adjustment function, thereby reducing overall system complexity despite adding active control capability
Solution Approach 2:
The electrostriction parts perform multiple functions: they provide the primary supporting force between substrates, enable dynamic adjustment in response to external forces, and serve as the actuator mechanism. This multi-functionality reduces the need for separate components and simplifies the overall system architecture
3Reliability
If voltage is changed to control electrostriction parts, then supporting force is adjusted dynamically, but energy consumption increases
Solution Approach 1:
The control module adjusts voltage periodically or on-demand based on detected external forces rather than maintaining continuous high voltage. By applying voltage only when adjustment is needed (such as when gravity mura is detected or when external forces change), the system achieves dynamic adaptability while minimizing energy consumption during stable operation
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 a uniform distance between substrates, preventing defects and maintaining display quality by dynamically adjusting supporting forces, thus avoiding gravity mura and ensuring consistent display performance.
Implementation Method 1
the control module determines at least one of the electrostriction parts corresponding to the force receiving location, and changes a voltage between at least one of the first electrodes and at least one of the second electrodes corresponding to the at least one of the electrostriction parts, so as to control the at least one of the electrostriction parts to be extended or retracted
Data Source
AI summary
A display panel includes first and second substrates and a control module. The first substrate includes first electrodes and electrostriction parts on the first electrodes. The second substrate includes second electrodes and spacers on the second electrodes. Orthogonal projections of the first and second electrodes on the first substrate overlap in overlap regions, and the electrostriction parts are disposed in the overlap regions. When the display panel receives an external force in a force receiving location, the control module determines at least one of the electrostriction parts corresponding to the force receiving location, and changes a voltage between at least one of the first electrodes and at least one of the second electrodes corresponding to the at least one of the electrostriction parts, so as to control the at least one of the electrostriction parts to be extended or retracted.