Double-Gate Driving Transistor Control for Extended Display Gradation
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Solution Overview
Problem
Existing display devices, particularly head-mounted displays, struggle to provide high-resolution images with extended operating ranges and detailed gradation expression, limiting their image quality.
Innovation Solution
A display device with a transistor structure featuring dual gate electrodes and an active layer, where data voltages applied to each gate electrode have different magnitudes and can be inversely proportional or opposite in polarity, allowing for extended operating range and improved gradation expression.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional single-gate transistor structure is used, then the device complexity is low, but the operating range is limited and gradation expression is insufficient
Solution Approach 1:
The transistor gate is segmented into two independent gate electrodes (first gate electrode and second gate electrode) that can be controlled by separate data voltages. This segmentation allows independent control of each gate, enabling extended operating range and improved gradation expression through differential voltage application, while maintaining a relatively simple overall transistor structure
Solution Approach 2:
The invention transitions from a single-gate control dimension to a dual-gate control dimension. By adding the second gate electrode with independent voltage control, the system gains an additional control dimension, allowing for more nuanced adjustment of the transistor's operating characteristics and enabling extended operating ranges with detailed gradation expression
2Manufacturing precision
If high-resolution display is implemented, then image quality improves, but the requirement for extended operating range and detailed gradation becomes more demanding
Solution Approach 1:
The invention changes the voltage parameters applied to the transistor gates by using two different data voltages with different magnitudes applied to the first and second gate electrodes respectively. This parameter change enables precise control of the transistor's threshold voltage and operating point, providing the extended operating range and detailed gradation expression needed for high-resolution displays
Data Source
AI summary
A display device including a light-emitting element, and a first transistor connected between a driving voltage line and the light-emitting element, the first transistor including a first gate electrode and a second gate electrode that face each other, and an active layer between the first gate electrode and the second gate electrode. The display device further includes a first data line connected to the first gate electrode of the first transistor, a second data line connected to the second gate electrode of the first transistor, and a data driver connected to the first data line and the second data line. The data driver applies a first data voltage to the first data line and applies a second data voltage having a different magnitude from the first data voltage to the second data line. The magnitude of the second data voltage varies depending on the magnitude of the first data voltage.