Display Panel Conductive Member for Electrostatic Discharge
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Solution Overview
Problem
Display devices are susceptible to damage from electrostatic discharge, which can induce electrical damage to circuit elements due to the lack of effective static electricity discharge paths.
Innovation Solution
A conductive member with a symmetrical two-division loop shape is disposed at the circumferential edge of the display panel to absorb and transmit static electricity to the ground through a flexible printed circuit board, preventing damage to circuit elements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conductive member is added to absorb and transmit static electricity, then the reliability of the display device is improved, but the device complexity increases
Solution Approach 1:
The conductive member is integrated with the functional tape structure, combining the protective function with the existing tape assembly. The conductive member forms part of the functional tape structure, eliminating the need for separate protective components and reducing overall device complexity while maintaining ESD protection functionality.
Solution Approach 2:
The functional tape serves multiple functions: it provides structural support, electrical insulation, and static electricity discharge pathways. The conductive member within the functional tape performs both mechanical reinforcement and electrical conduction functions, reducing the need for additional dedicated components.
2Reliability
If the conductive member is made as a loop shape symmetrically divided into two portions, then the static electricity discharge effectiveness is improved, but the manufacturing precision requirements increase
Solution Approach 1:
The conductive member is divided into two separate conductive portions that are symmetrically arranged. This segmentation allows each portion to be manufactured and positioned independently, reducing the overall manufacturing precision requirements while maintaining the symmetrical configuration needed for effective static electricity discharge from either side of the display panel.
3Reliability
If the conductive member includes disconnected sections separated by 50-100 micrometers, then the electrostatic discharge path is improved, but the manufacturing complexity increases
Solution Approach 1:
The functional tape has different conductive properties in different regions: the conductive portions provide ESD pathways while the disconnected sections (50-100 micrometers apart) provide electrical insulation. This local differentiation of conductive and insulating regions allows the structure to simultaneously provide ESD protection and prevent unwanted electrical conduction, with the patterned conductive sections being manufacturable using standard photolithography processes.
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
The solution effectively discharges static electricity to the ground, enhancing the reliability and protection of the display device against electrostatic-induced failures.
Implementation Method 1
a conductive member (30) at the rear surface of the display panel, the conductive member absorbing and transmitting static electricity generated in the display panel
Data Source
AI summary
A display device, including a display panel; a flexible printed circuit board (FPCB) including a driving integrated circuit (IC) and attached to a rear surface of the display panel; a conductive member at the rear surface of the display panel; an FPCB connection pad connected to the conductive member at the rear surface of the display panel and connected to the FPCB; an FPCB connection terminal connected to the FPCB connection pad and at the FPCB; and a ground at the FPCB.