Grooved Resin Sealing for Display Panel Ink Isolation
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Solution Overview
Problem
Conventional display panels face issues with ink circulation and bubble generation due to uneven retaining walls, affecting display quality in display panels and related devices like electronic tags and electrochromic displays.
Innovation Solution
The solution involves forming grooves in a resin material layer on the first substrate with complementary shapes to the second ends of the retaining walls, allowing these ends to be fitted into the grooves, thereby preventing ink circulation and bubble formation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If retaining walls are used to define ink regions, then ink circulation is prevented, but uneven heights of retaining walls cause gaps that lead to ink crosstalk and bubble generation
Solution Approach 1:
The patent applies preliminary action by forming grooves in the first substrate before assembling the retaining walls. These grooves are pre-configured to receive the second ends of the retaining walls, ensuring proper positioning and sealing even when retaining walls have height variations. This pre-prepared structure prevents ink crosstalk and bubble formation without requiring perfectly uniform retaining wall heights.
2Reliability
If retaining walls are made taller to prevent ink circulation, then ink region isolation improves, but gaps between retaining walls and first substrate increase
Solution Approach 1:
The patent introduces grooves as an intermediary structure between the retaining walls and the first substrate. These grooves act as a mediator that accommodates the second ends of the retaining walls, providing a sealing interface that prevents ink crosstalk and bubble formation. The grooves fill the gap between the retaining walls and substrate, eliminating the harmful effects without requiring the retaining walls to be excessively tall.
Data Source
AI summary
A display panel includes: a first substrate; a second substrate disposed opposite to the first substrate; retaining walls disposed between the first substrate and the second substrate and each having a first end disposed on the second substrate and a second end opposite to the first end; and a material layer disposed on a side of the first substrate facing the second substrate and formed with grooves in which the second ends of the retaining walls are fitted.