Backup Wiring for OLED Touch Signal Repair
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current organic light emitting diode (OLED) display panels with narrow bezels face touch signal wiring disconnection issues due to tiny particles, leading to failed touch functions and reduced product yield, as these disconnections are only detectable during module testing and cannot be repaired.
Innovation Solution
A display module with a backup wiring set, where the backup wiring is on a different layer than the touch signal lines and includes terminal-side and wiring-side bridging sections, allowing for partial overlap with the touch signal lines' ends, enabling repair via methods like laser beam welding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If touch signal wiring line width is reduced to achieve narrow bezels, then the bezel width is reduced, but the wiring becomes more susceptible to disconnection from tiny particles
Solution Approach 1:
The patent introduces a vertical dimension by placing backup wirings on a different layer (lower layer) than the touch signal wirings (upper layer). This multi-layer structure allows the backup wirings to provide alternative conduction paths without occupying horizontal space, thus maintaining narrow bezel width while improving wiring reliability through dimensional separation.
Solution Approach 2:
The backup wirings are pre-configured on the lower layer during manufacturing, positioned to overlap with the projections of the touch signal wiring ends. This preliminary arrangement ensures that if disconnection occurs, the backup pathways are already in place and can be activated through laser welding or other connection methods, preventing complete failure.
2Length of stationary object
If touch signal wiring line width is reduced to achieve narrow bezels, then the bezel width is reduced, but touch function fails when disconnection occurs
Solution Approach 1:
By utilizing the vertical dimension with multi-layer structure, the patent ensures touch function availability through backup wirings on the lower layer. These backup wirings remain inactive during normal operation but can be activated when needed, maintaining narrow bezel design while ensuring continuous touch functionality.
Solution Approach 2:
The backup wirings serve as a cushioning mechanism prepared in advance. When the primary touch signal wirings disconnect, the backup wirings can be connected through laser welding or other methods to restore the touch signal transmission, thereby cushioning against complete touch function failure and maintaining operational availability.
3Productivity
If wiring disconnection is only detected during module detection, then manufacturing efficiency is maintained, but repair becomes impossible and product yield decreases
Solution Approach 1:
The backup wirings are pre-configured on the lower layer during the manufacturing process, positioned to overlap with the projections of the touch signal wiring ends. This preliminary arrangement enables subsequent repair through laser welding or other connection methods, transforming an otherwise unrepairable situation into a repairable one without compromising initial manufacturing efficiency.
Solution Approach 2:
When wiring disconnection is detected, the patent enables recovery by connecting the backup wirings to the disconnected wiring ends through laser welding or other connection methods. This process recovers the touch signal transmission function by switching from the failed primary wiring to the backup wiring, thereby improving repairability while maintaining productivity.
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
Enables effective repair of disconnected touch signal lines, thereby preventing low product yield caused by unrepairable failures and ensuring functional integrity.
Implementation Method 1
enabling repair via methods like laser beam welding
Data Source
AI summary
A display module and a display device are provided. The display module includes a plurality of touch electrode sets. Each of the touch electrode sets is connected to one touch signal line. One backup wiring at least corresponds to one of touch signal lines. An orthogonal projection of first ends of the touch signal lines on the display panel partially overlaps an orthogonal projection of a terminal-side bridging section on the display panel. An orthogonal projection of second ends of the touch signal lines on the display panel partially overlaps an orthogonal projection of a wiring-side bridging section on the display panel.