Display Panel Seal Block for Liquid Crystal Injection
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Solution Overview
Problem
Conventional display panel fabrication processes result in residual liquid crystal on peripheral electrodes due to capillarity, leading to poor quality panels, contamination, and unnecessary cleaning processes, which consume materials and labor, and can damage electrodes during testing.
Innovation Solution
A method involving a seal structure with liquid crystal inlets and blocks on a substrate, where the blocks are positioned between the inlets and the seal connections to prevent capillary flow of liquid crystal, reducing contamination and enhancing the sealing effect by compressing the blocks against the seal during substrate pressing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional seal structure is used during liquid crystal injection, then the sealing function is provided, but residual liquid crystal accumulates on peripheral electrodes due to capillarity causing contamination and poor quality
Solution Approach 1:
The seal structure is segmented into multiple functional regions: a first seal portion for sealing, a second seal portion forming a groove, and a block structure with inclined surface. This segmentation allows each portion to address specific problems - the groove captures residual liquid crystal while the inclined surface directs it away from electrodes, preventing contamination while maintaining sealing.
Solution Approach 2:
The block structure acts as an intermediary element between the seal and the electrodes. Its inclined surface serves as a mediator that redirects residual liquid crystal flow away from the peripheral electrodes, preventing direct contact and contamination while allowing the seal to maintain its sealing function.
2Ease of manufacture
If conventional liquid crystal injection is performed without additional structures, then the injection process is simple, but cleaning processes are required after injection consuming materials and labor
Solution Approach 1:
The seal structure with groove and inclined surface is prepared in advance before liquid crystal injection. This preliminary configuration automatically prevents residual liquid crystal from reaching electrodes during the injection process itself, eliminating the need for subsequent cleaning operations and associated material consumption.
3Productivity
If residual liquid crystal remains on electrodes after injection, then the injection process completes, but electrode damage occurs during testing requiring physical sweeping
Solution Approach 1:
The block structure with inclined surface serves as a protective intermediary that redirects residual liquid crystal away from electrodes during and after injection. This prevents liquid crystal accumulation that would otherwise require physical sweeping during testing, thereby protecting electrode integrity while maintaining injection productivity.
4Device complexity
If the seal structure does not prevent capillary flow, then the seal structure is simple, but liquid crystal is wasted on the outer side of the seal
Solution Approach 1:
The seal is segmented into a first seal portion and a second seal portion that forms a groove. This segmentation creates a controlled structure that manages capillary flow by providing a designated groove for residual liquid crystal, preventing it from spreading to the outer side of the seal and reducing waste while adding minimal structural 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
This method significantly reduces electrode contamination, saves material and labor in cleaning processes, and prevents electrode damage during testing by effectively managing capillary flow and minimizing liquid crystal waste.
Implementation Method 1
peripheral electrodes of the display panel usually have residual liquid crystal thereon due to the capillarity
Implementation Method 2
pressing a second substrate against the first substrate having the seal and the block thereon, such that the block adjoins the first side of the seal after the second substrate is pressed
Data Source
AI summary
A method for fabricating a display panel is provided. The method includes steps of: disposing a seal on a first substrate, in which a first side of the seal connects in approximately perpendicular to a second side of the seal and has at least one liquid crystal inlet; forming at least one block on the first substrate and between the liquid crystal inlet and the connection of the first side and the second side of the seal, in which there is a space between the block and the first side of the seal when the block is formed; and pressing a second substrate against the first substrate having the seal and the block thereon, such that the block adjoins the first side of the seal after the second substrate is pressed.