Display Panel Cell-Test Layout for Narrow Bezel Moisture Resistance
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Mini-LED display panels using TFT substrates face issues with water vapor penetration through metal test wires in the non-display area, leading to performance degradation and reduced lifespan.
Innovation Solution
The display panel design reduces the number of metal wires in the non-display area by using a detecting TFT and original signal transmission wires for the cell test, thereby minimizing water vapor penetration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple metal test wires are provided in the non-display area for cell test, then the cell test can be achieved, but the width of the bezel increases and water vapor can penetrate into the driving backplane along the test wires
Solution Approach 1:
The patent extracts and removes the test wires from the non-display area after the cell test is completed. The cutting process removes the test wires and the surrounding non-display area, eliminating the pathways through which water vapor could penetrate into the driving backplane during product use.
Solution Approach 2:
The cell test is performed before the final product assembly, and the test wires are removed after testing. This preliminary testing followed by removal eliminates the harmful effect of test wires remaining in the final product, preventing water vapor penetration while maintaining test functionality.
2Reliability
If multiple metal test wires are provided in the non-display area for cell test, then the cell test can be achieved, but the width of the bezel increases
Solution Approach 1:
The test wires are extracted from the non-display area after serving their testing purpose. By removing the test wires and the surrounding non-display area through cutting, the bezel width is minimized while retaining the necessary cell test capability during manufacturing.
Solution Approach 2:
The cell test is performed as a preliminary action before final product completion. The test wires are temporarily present only during the testing phase and are subsequently removed, allowing for minimal bezel width in the final product while maintaining test functionality when needed.
Data Source
AI summary
A display panel, a detection method thereof, and a tiled display screen are provided. The display panel includes a driving backplane and a light-emitting device disposed on the display panel; wherein the driving backplane has a display area and a non-display area disposed at a periphery of the display area; the light-emitting device is disposed corresponding to the display area; a driving thin film transistor (TFT) and a detecting TFT are disposed in the display area of the driving backplane; and the driving backplane is further provided with a detecting gate wire and a detecting signal wire; wherein the detecting TFT includes a first gate, a first source and a first drain.