Display Device Shielding Film Protrusions for ESD Protection
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Solution Overview
Problem
Thin and highly integrated display devices are prone to electrostatic damage due to static electricity accumulation, which can lead to defects from high discharging voltages affecting internal circuits and elements.
Innovation Solution
A display device with a conductive shielding film featuring protrusions adjacent to the flexible circuit unit, including a metal layer and insulation, effectively shields electrostatic discharge and connects to a ground to dissipate static electricity, particularly around the driving chip of the COF.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the display device is made thinner and highly integrated, then the display quality and integration are improved, but static electricity is easily accumulated and electrostatic discharge damage occurs
Solution Approach 1:
A conductive shielding film is introduced as an intermediary component between the flexible circuit unit and the display panel. This shielding film includes a conductive layer with protrusions that extend toward the flexible circuit unit, creating a protective barrier that intercepts and redirects electrostatic discharge away from sensitive internal circuits, thereby resolving the contradiction between high integration and electrostatic damage resistance
Solution Approach 2:
The shielding film features localized protrusions at specific positions adjacent to the flexible circuit unit where electrostatic discharge is most likely to occur. This local quality approach concentrates the shielding function exactly where needed, providing targeted protection without requiring complete coverage of the entire display device, thus maintaining high integration while improving reliability
2Reliability
If a shielding film is added to protect against electrostatic discharge, then reliability is improved, but device complexity and structure are increased
Solution Approach 1:
The shielding protection is implemented using a thin flexible circuit unit that incorporates a conductive layer with protrusions. This thin film approach provides effective electrostatic discharge protection while minimizing the increase in device complexity and overall thickness, as the shielding function is integrated into the existing flexible circuit structure rather than adding bulky separate components
Solution Approach 2:
The shielding function is merged with the flexible circuit unit by integrating the conductive layer and protrusions directly into the flexible circuit structure. This combining approach eliminates the need for separate shielding components, reducing device complexity while maintaining reliable electrostatic discharge protection
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 removes static electricity generated near the flexible circuit unit, preventing damage from electrostatic discharge and ensuring the reliability of the display device by dissipating static charges efficiently.
Implementation Method 1
a conductive shielding film disposed on a surface of the display panel... connected to a ground to dissipate static electricity
Implementation Method 2
a conductive shielding film... effectively shields electrostatic discharge... comprising a metal layer including at least one selected from the group consisting of copper (Cu), aluminum (Al), silver (Ag) and gold (Au)
Data Source
AI summary
A display device having a display panel, a conductive shielding film disposed on a surface of the display panel, and a flexible circuit unit connected to another surface of the display panel and configured to provide a driving signal to the display panel, wherein the shielding film has at least one protrusion disposed adjacent the flexible circuit unit.