Display Device Back Gate Electrode Integration
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Solution Overview
Problem
Display devices with high off leak current lead to increased power consumption and compromised display quality, and existing solutions struggle to balance threshold voltage and off leak current without increasing circuit complexity.
Innovation Solution
A display device design featuring a substrate with a first and second gate electrode, an active layer between them, and a data electrode connected to one of the gate electrodes, which reduces off leak current by optimizing voltage application through the data line.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a constant voltage is applied to back gate electrodes via an individual signal line to modulate gate voltage, then the threshold voltage can be adjusted, but the circuit complexity increases and off leak current cannot be sufficiently reduced
Solution Approach 1:
The patent merges the function of the back gate electrode with the data electrode by connecting them together, eliminating the need for a separate individual signal line. This integration allows the data electrode to simultaneously serve as both data transmission and back gate voltage application, thereby reducing circuit complexity while maintaining the ability to modulate threshold voltage and reduce off leak current
Solution Approach 2:
The data electrode is given dual functionality: it serves both as the data electrode for signal transmission and as the back gate electrode for threshold voltage modulation. This multi-functionality approach eliminates redundant components and simplifies the circuit structure while achieving the dual objectives of data display and off leak current reduction
2Reliability
If the threshold voltage is decreased to improve display quality, then the off leak current increases, but power consumption increases
Solution Approach 1:
The patent dynamically adjusts the voltage parameter of the back gate electrode (which is connected to the data electrode) to optimize the threshold voltage of the thin film transistor. By changing the voltage parameter applied to the combined data and back gate electrode, the system can reduce off leak current without compromising display quality, thereby reducing power consumption while maintaining performance
Data Source
AI summary
A display device including a substrate, a first gate electrode, a second gate electrode, an active layer, and a first data electrode is provided. The active layer is disposed between the first gate electrode and the second gate electrode. And one of the first gate electrode and the second gate electrode is connected to the data line, so as to reduce the off leak current.