Static Electricity Blocking Lines for Display Driver Protection
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Solution Overview
Problem
Display devices, particularly OLEDs, face challenges in minimizing the non-display area to enhance screen-to-body ratio while ensuring the reliability of components like driver circuits, which are vulnerable to static electricity.
Innovation Solution
Incorporating static electricity blocking lines that overlap the driver circuit and control lines, and using dams and a connection line to protect these components, with the static electricity blocking lines being partially or fully covered by an encapsulation layer to prevent damage from static electricity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the non-display area is reduced to increase screen-to-body ratio, then the aesthetic appearance and screen-to-body ratio are improved, but the reliability of driver circuits deteriorates due to increased vulnerability to static electricity
Solution Approach 1:
A static electricity blocking line is introduced as an intermediary element between the driver circuit and external environment. This blocking line acts as a mediator that intercepts and dissipates static electricity before it can reach and damage the driver circuit, thereby protecting the circuit while allowing the non-display area to remain compact
Solution Approach 2:
The static electricity blocking line is positioned to preemptively counteract static electricity discharge before it can affect the driver circuit. By placing the blocking line in the non-display area overlapping the driver circuit location, the system performs preliminary protection against potential static electricity damage
2Area of stationary object
If elements in the non-display area are designed with smaller size to reduce non-display area, then the screen-to-body ratio is improved, but the reliability of the display device deteriorates
Solution Approach 1:
The static electricity blocking line provides localized protection specifically in the non-display area where the driver circuit is positioned. This targeted approach allows compact design of individual elements while providing concentrated protection where needed, maintaining reliability without increasing overall non-display area
Data Source
AI summary
A display device includes a substrate that includes a display area and a non-display area. A driver is disposed in the non-display area, and includes a driver circuit including a transistor and a driver control line transmitting a control signal to the driver circuit. A static electricity blocking line is disposed in the non-display area and circumscribes the display area. The static electricity blocking line at least partially overlaps the driver.