Display Device Peripheral Wiring Configuration for Signal Integrity
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Solution Overview
Problem
Conventional liquid crystal display devices face challenges in minimizing edge-rounded signals due to high trace resistance, particularly in larger and higher-definition displays, where the limited width of spare wires raises signal trace resistance and invites edge-rounding issues.
Innovation Solution
The implementation of a display device with a specific wiring configuration involving first, second, third, fourth, and fifth wires overlapping via an insulating film, allowing for short-circuiting processes to reroute signals around broken wires, reducing trace resistance and preventing edge-rounding by using spare wires to bypass the broken paths.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the width of spare wires is increased, then signal trace resistance is reduced, but the available area in the non-display region is insufficient
Solution Approach 1:
The spare wire is divided into multiple segments (first wire, second wire, third wire, fourth wire, fifth wire) that are arranged in a folded pattern. Each segment has a specific function in the signal transmission path, allowing the spare wire to achieve low resistance through multiple parallel segments rather than requiring a single wide conductor.
Solution Approach 2:
The spare wire segments are arranged in a nested folded configuration where the third wire is routed from the second end portion of the first wire to the second end portion of the second wire, with the fourth and fifth wires overlapping at specific portions. This nesting allows multiple wire segments to occupy compact space efficiently.
2Reliability
If the trace resistance is reduced by increasing wire width, then edge-rounding is minimized, but the wiring complexity increases
Solution Approach 1:
The wiring configuration provides dynamic adaptability through the folded spare wire structure. When a display wire breaks, the spare wire can be activated to replace the broken wire, providing a dynamic repair mechanism that maintains signal quality without requiring permanent complex wiring for all possible failure scenarios.
Solution Approach 2:
The spare wire structure serves multiple functions: it acts as a backup for broken display wires, provides alternative signal paths, and can be configured to connect at different points depending on where the break occurs. This multi-functionality reduces the need for separate dedicated repair wiring for each potential failure point.
3Reliability
If spare wires are used to bypass broken display wires, then signal transmission is maintained, but the manufacturing process becomes more complex
Solution Approach 1:
The spare wire segments are pre-positioned and overlapped with the display wires and with each other during the manufacturing process. The overlapping portions are arranged in advance to facilitate subsequent laser short-circuiting, so that when a break occurs, the repair process only requires forming conductive connections at predetermined locations rather than routing new wires.
Solution Approach 2:
The patent replaces mechanical wire routing and physical connections with a laser-based short-circuiting process. Instead of mechanically connecting the spare wire to display wires through traditional bonding methods, the invention uses laser irradiation to create conductive paths through the insulating film, simplifying the manufacturing process.
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
This configuration effectively reduces trace resistance and minimizes edge-rounding of signals, enabling reliable operation in higher-definition and larger-size liquid crystal display devices by ensuring signal integrity through redundant pathways.
Implementation Method 1
a short circuit is established by a short-circuiting process such as laser irradiation between a first end portion and a second end portion of the display wire suffering the wire breakage
Data Source
AI summary
A display device includes: display wires; first wires including first end portions overlapped with first end portions of the plurality of display wires via an insulating film; second wires including first end portions overlapped with second end portions of the display wires via the insulating film; third wires routed from second end portions of the first wires to second end portions of the second wires; a fourth wire overlapping with the second end portions of the first wires and first end portions of the third wires via the insulating film; and a fifth wire overlapping with the second end portions of the second wires and second end portions of the third wire via the insulating film.