Display Panel Sealing Structure for μLED Splicing Gaps
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Solution Overview
Problem
In large-scale splicing of liquid crystal displays, gaps between spliced panels are visible due to height differences caused by micro light-emitting diodes (μLEDs), leading to image distortion and instability.
Innovation Solution
A display panel design featuring a first and second sealing glue layer with varying heights and fiber compositions to fill terrain height differences, ensuring proper sealing of the liquid crystal layer and maintaining consistent gaps between substrates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If micro light-emitting diodes (μLEDs) are added on the boarder of the liquid crystal display to eliminate visible gaps, then image continuity is improved, but terrain height difference between edges with μLED and edges without μLED increases
Solution Approach 1:
The sealing glue layer is designed with different heights at different locations: a first height in the first display area and a second height in the second display area where μLEDs are mounted. This local variation in height compensates for the terrain difference caused by μLEDs, allowing the sealing structure to accommodate both flat and elevated regions while maintaining proper sealing and image continuity.
2Area of stationary object
If multiple liquid crystal displays are spliced to achieve large scale display, then display area is increased, but visible gaps and image distortion occur at splicing borders
Solution Approach 1:
The display panel is divided into a first display area and a second display area, with the second area serving as a border region that can be spliced with adjacent panels. The sealing glue layer extends into this second display area to provide proper sealing and height compensation at the splicing borders, enabling multiple panels to be connected while maintaining image continuity and eliminating visible gaps.
3Reliability
If sealing glue layer is applied to seal liquid crystal in center of display, then liquid crystal sealing is achieved, but terrain height difference prevents proper sealing in single process
Solution Approach 1:
The sealing glue layer is designed with preliminary height compensation built-in, where the first portion in the second display area extends to compensate for the terrain height difference caused by μLEDs before the liquid crystal is filled. This preliminary action allows the sealing process to be completed in a single step without requiring additional processes to address height differences.
Data Source
AI summary
A display panel includes a first substrate, a second substrate, a first sealing glue layer, a second sealing glue layer and a liquid crystal layer. The first substrate has a first display area and a second display area, in which a plurality of light-emitting diodes (LEDs) are disposed in the second display area. The second display area surrounds the first display area and has a first edge, a second edge, a third edge and a fourth edge. The second substrate is located on the first substrate. The first sealing glue layer has a first portion, in which the first sealing glue layer includes fiber and the first sealing glue layer is at least adjacent to the first edge. The second sealing layer has a first portion, in which the second sealing glue layer covers the LEDs.