Display Device Driving Transistor Fast Sampling
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Solution Overview
Problem
Display devices with a single gate electrode transistor face limitations in simultaneously performing sampling and data writing operations due to the restricted use of a single channel, leading to inefficiencies in sampling speed and data voltage margin.
Innovation Solution
The implementation of a display device and driving method utilizing a 5T2C structure with two gate electrodes and storage capacitors, allowing for fast sampling using a sampling voltage stored in one capacitor and data writing using a data voltage stored in another, enabling separate operation modes for improved performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If a single gate electrode transistor is used, then the device structure is simple, but the sampling speed is limited and cannot simultaneously perform sampling and data writing operations
Solution Approach 1:
The patent divides the single gate electrode into two separate gate electrodes (first gate electrode and second gate electrode), allowing independent control of sampling and data writing operations. This segmentation enables the transistor to perform multiple functions simultaneously by applying different voltages to each gate electrode at different times.
Solution Approach 2:
The patent implements dynamic operation modes by selectively applying voltages to different gate electrodes. The transistor can switch between a first operation mode (using first gate electrode for sampling) and a second operation mode (using second gate electrode for data writing), enabling adaptive performance optimization based on operational requirements.
2Reliability
If a single channel is used for both sampling and data writing, then the device structure is simple, but the data voltage margin is insufficient
Solution Approach 1:
The patent segments the single channel into two separate channels (first channel and second channel), each dedicated to specific operations. The first channel handles sampling operations while the second channel handles data writing, preventing signal interference and ensuring adequate voltage margins for reliable operation.
Solution Approach 2:
Each channel is optimized for its specific function with dedicated storage capacitors (first storage capacitor for sampling voltage, second storage capacitor for data voltage). This local optimization ensures that each channel maintains appropriate electrical characteristics for its intended operation, improving overall reliability.
3Productivity
If simultaneous sampling and data writing operations are performed, then productivity is improved, but the single gate electrode cannot support multiple operation modes
Solution Approach 1:
The transistor is designed with multi-functionality by incorporating two gate electrodes that can independently control different operation modes. The same transistor structure can perform both sampling and data writing operations by selectively activating different gate electrodes, achieving universal functionality without requiring separate transistors for each function.
Solution Approach 2:
The patent implements periodic switching between operation modes by applying voltages to gate electrodes in a timed sequence. During a first period, the first gate electrode is activated for sampling; during a second period, the second gate electrode is activated for data writing. This periodic action enables continuous high-productivity operation without mode conflicts.
Data Source
AI summary
The present specification provides a display device and a driving method thereof performing sampling for sensing a sampling voltage of a driving transistor using a fast mode in which a driving transistor operates by a sampling voltage formed in one storage capacitor, and data writing using the slow mode in which the driving transistor is operated by a data voltage formed in another storage capacitor.