Display Panel TFT Protection Circuit for Low Leakage Current
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Solution Overview
Problem
Static electricity generated during the production and transport of display panels can cause high voltage strikes, leading to component failure due to leakage currents in the electrostatic protection circuit, which affects the display quality by preventing normal grayscale and brightness display.
Innovation Solution
Incorporating a thin film transistor with an active layer and auxiliary electrodes disposed directly on the channel portion, which are distributed along the channel length and can be bending, to increase plasma uniformity and reduce leakage currents.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an electrostatic protection circuit is disposed in the display panel to release high voltage and prevent static electricity damage, then reliability is improved, but leakage current increases causing deterioration in display quality
Solution Approach 1:
The channel portion is divided into multiple segments by introducing auxiliary electrodes that contact the channel portion at different positions. This segmentation creates multiple smaller conduction paths, allowing better control and distribution of current flow, thereby reducing leakage current while maintaining electrostatic protection functionality
Solution Approach 2:
Auxiliary electrodes are introduced as intermediary elements between the source and drain electrodes. These auxiliary electrodes contact the channel portion and serve as intermediate conduction points, enabling better control of plasma distribution and reduction of leakage current through improved oxygenation uniformity
2Object-generated harmful factors
If auxiliary electrodes are disposed directly on the channel portion to reduce leakage current, then display quality is improved, but device complexity increases
Solution Approach 1:
The auxiliary electrodes are merged with the same layer structure as the source and drain electrodes, utilizing the existing fabrication process steps. This integration approach reduces the need for additional separate processing steps, thereby limiting the increase in manufacturing complexity while achieving leakage current reduction
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 auxiliary electrodes enhance plasma uniformity, reducing leakage currents and improving display quality by ensuring even oxygenation during chemical vapor deposition, thus protecting the electrostatic protection circuit and maintaining proper display functionality.
Implementation Method 1
increase uniformity of plasma applied to the channel portion
Implementation Method 2
even oxygenation during chemical vapor deposition
Data Source
AI summary
The present application provides a display panel, the display panel includes an electrostatic protection circuit. The electrostatic protection circuit includes at least one thin film transistor. The thin film transistor includes an active layer. The active layer includes a channel portion. Disposing at least one auxiliary electrode on the channel portion and making the auxiliary electrode contact the channel portion can use the additional auxiliary electrode to increase plasma to affect uniformity of the channel portion such that a leakage current of the thin film transistor is reduced to improve display quality of the display panel.