Display Device Pad Configuration for Static Electricity Discharge
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Solution Overview
Problem
Display devices are susceptible to damage from static electricity, particularly in the non-display areas where wires are located, leading to potential damage to signal lines and reduced reliability.
Innovation Solution
Incorporating a common voltage supply line and alignment pads in the non-display area, with specific pad configurations to direct static electricity away from critical signal pads, utilizing anisotropic conductive films for connection, and employing a conductive coupling member to disperse static electricity, thereby preventing damage to signal lines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If wires are provided in the non-display area for electrical connections, then the display device can function properly, but the wires become vulnerable to static electricity damage
Solution Approach 1:
The patent introduces a ground pad as an intermediary element between the data pad and the common voltage supply line. This ground pad acts as a mediator that provides a safe discharge path for static electricity, preventing it from damaging the data line while maintaining proper electrical connections for device operation
2Ease of operation
If the pad is positioned closer to the edge for connection purposes, then ease of connection is improved, but susceptibility to static electricity increases
Solution Approach 1:
The patent segments the pad structure into multiple functional components: a data pad for signal connection, a ground pad for static electricity discharge, and an alignment pad for positioning. This segmentation allows each pad to be optimized for its specific function while working together to protect against static electricity damage
3Device complexity
If conventional pad structures are used without special configurations, then device complexity is reduced, but reliability against static electricity damage deteriorates
Solution Approach 1:
The patent merges multiple functions into the pad structure: the ground pad simultaneously serves as an electrical connection point, a static electricity discharge path, and part of the overall alignment structure. This merging provides comprehensive protection without requiring entirely separate systems
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
Enhances the reliability of display devices by effectively dispersing static electricity, reducing the risk of damage to signal lines and improving the overall performance and durability of the display device.
Implementation Method 1
employing a conductive coupling member to disperse static electricity
Data Source
AI summary
A display device includes a first substrate including a display area and a non-display area, which is on the periphery of the display area, a light-emitting element disposed on the first substrate and in the display area, a display signal line which is disposed on the first substrate and in the display area, extends in a first direction, and transmits a signal to the light-emitting element, a common voltage supply line disposed on the first substrate and in the non-display area, a pad disposed on the first substrate and in the non-display area, and electrically connected to the display signal line, and an indentation pad disposed on the first substrate and in the non-display area, and electrically connected to the common voltage supply line, where the indentation pad is disposed closer than the pad to edges of the first substrate in a second direction, which intersects the first direction.