Shield Layer for Gate Driver in Display Bezel Area
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Solution Overview
Problem
Display devices face challenges in maintaining the electrical characteristics of thin film transistors and reducing bezel area while achieving high resolution pixels, particularly due to the susceptibility of thin film transistors to external voltage and static electricity.
Innovation Solution
The implementation of a shield power supply line and shield layer in the bezel area of the display device, connected to the data driver, which overlaps with the gate driver and pixels, helps to stabilize the electrical characteristics of the thin film transistors and reduce the bezel area by shielding external electric fields.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If thin film transistors are used in the gate driver, then the device can be integrated in the bezel area, but the electrical characteristics of the thin film transistors change due to susceptibility to surrounding voltage and static electricity
Solution Approach 1:
A shield layer is introduced as an intermediary component between the thin film transistors and the external environment. This shield layer, connected to a shield power supply line, acts as a mediator that blocks the influence of surrounding voltage and static electricity, thereby protecting the electrical characteristics of the thin film transistors while allowing device integration in the bezel area
2Area of stationary object
If the gate driver is disposed in the bezel area, then the bezel area is utilized efficiently, but the thin film transistors are exposed to external electric fields causing characteristic changes
Solution Approach 1:
The shield layer serves as a protective intermediary positioned between the thin film transistors in the gate driver and the external electric fields. By connecting this shield layer to the shield power supply line, the harmful external electric field influences are blocked, allowing efficient utilization of the bezel area for the gate driver while protecting against environmental interference
3Device complexity
If no shielding structure is added, then the device complexity is low, but the electrical characteristics of thin film transistors cannot be maintained
Solution Approach 1:
A relatively simple shield layer structure is introduced as a minimal intermediary component. This shield layer, connected via a shield power supply line, provides the necessary protection against external electric fields with minimal added complexity, thereby maintaining the electrical characteristics of thin film transistors without significantly increasing device complexity
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 prevents changes in the electrical characteristics of the thin film transistors, reduces the bezel area, and enables the design of high-resolution pixels by maintaining consistent voltage potentials and minimizing parasitic capacitors.
Implementation Method 1
a shield layer overlapped with at least one thin film transistor of the gate driver and connected to the shield power supply line in the bezel area
Data Source
AI summary
A display device includes a substrate including an active area having a plurality of pixels and a bezel area around the active area; a data driver on one side of the bezel area; a gate driver on at least one side of the bezel area; a shield power supply line extending from the data driver to at least one side of the gate driver; and a shield layer overlapped with at least one thin film transistor of the gate driver and connected to the shield power supply line in the bezel area.