Retaining Wall Blocks Alignment Liquid Overflow in Display Panel
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Solution Overview
Problem
In liquid crystal display panel manufacturing, the alignment liquid often overflows along channels formed at bridging connection positions, leading to poor contact with seals and affecting process yield due to the higher flowability of droplets used in ink-jet printers compared to roller printers.
Innovation Solution
A retaining wall is strategically arranged beside the first metal wire at the channel position to prevent overflow, with features such as parallel alignment, reduced wire width, and metal composition to effectively block the alignment liquid, and the retaining wall can be single-layer or multi-layered, higher than the metal wire, and of varying widths to maximize blocking efficacy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a channel is formed at the bridging connection position of the first metal wire and signal line, then the signal line can bridge over the first metal wire and be fed into the display area, but the alignment liquid will overflow along the channel causing poor contact of the seal
Solution Approach 1:
A retaining wall structure is introduced as an intermediary element between the channel and the seal. This retaining wall blocks the alignment liquid from flowing along the channel, preventing it from reaching the seal and causing poor contact. The retaining wall serves as a mediator that allows the channel to exist for signal routing while preventing its harmful effect on seal contact.
2Productivity
If ink-jet printer is used for alignment liquid application, then large-scale production is enabled, but the alignment liquid has higher flowability and lower viscosity causing overflow
Solution Approach 1:
The retaining wall structure converts the harmful effect of high-flowability alignment liquid into a manageable situation. By providing a physical barrier, the design allows the use of ink-jet printing (which requires low-viscosity, high-flowability liquid for efficient droplet deposition) while preventing the very property that makes ink-jet printing effective from causing overflow and seal contact problems.
Data Source
AI summary
This application discloses a display panel and a display apparatus. The display panel includes a display area, a seal, a first metal wire, a signal line, a channel and a retaining wall. The seal is correspondingly arranged in a nondisplay area of the display panel. The first metal wire is correspondingly arranged between the display area and the seal. The signal line bridges over the first metal wire and is fed into the display area. The channel is located at a bridging connection position of the first metal wire and the signal line. The retaining wall is arranged at a position corresponding to the channel, beside the first metal wire.