Dual-Gate OLED Pixel Transistor Layout for Shock-Resistant Displays
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Solution Overview
Problem
Display apparatuses are prone to defects and reduced image quality due to external shocks, making high-resolution imaging challenging.
Innovation Solution
The display apparatus incorporates a substrate with specific transistor configurations, including dual gate electrodes and semiconductor layers, to enhance resilience against external shocks, utilizing silicon and oxide semiconductors for improved transistor performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional transistor configurations are used in display apparatuses, then the device complexity is low and manufacturing is easier, but the reliability deteriorates due to high probability of defects from external shocks
Solution Approach 1:
The gate electrode is divided into two separate gate electrodes (first gate electrode and second gate electrode) that are positioned at different heights. This segmentation allows each gate electrode to independently control different portions of the channel, providing redundant control paths that prevent complete circuit failure when external shocks occur, thereby improving reliability without requiring complete redesign of the transistor architecture
Solution Approach 2:
The patent introduces a vertical dimension to the gate electrode configuration by positioning the first gate electrode and second gate electrode at different heights above the channel. This three-dimensional arrangement creates spatial separation that protects against shock-induced failures while maintaining electrical functionality, resolving the contradiction between improved reliability and increased structural complexity
2Reliability
If dual gate electrode configuration is implemented, then the reliability improves against external shocks, but the device complexity increases
Solution Approach 1:
The dual gate electrode configuration enables dynamic control of the channel through independent voltage application to the first and second gate electrodes. This dynamic control mechanism allows the transistor to adapt its conductivity state in response to external shocks, maintaining reliability while managing complexity through flexible electrical control rather than rigid structural modifications
Solution Approach 2:
The patent utilizes parameter changes by applying different voltages to the first gate electrode and second gate electrode to control the channel conductivity. This electrical parameter control provides a means to improve reliability against external shocks without requiring complex mechanical or structural changes, as the system responds through electrical parameter adjustment rather than physical reconfiguration
Data Source
AI summary
A display apparatus includes a substrate including a display area on which a display element is disposed, an emission control transistor which is disposed in the display area, includes a first semiconductor layer, and is connected to a pixel electrode of an organic light-emitting diode, a switching transistor disposed in the display area and including a second semiconductor layer, and a first initialization transistor disposed in the display area and including a third semiconductor layer, wherein the first semiconductor layer and the second semiconductor layer each include a silicon semiconductor, the third semiconductor layer includes an oxide semiconductor, and at least one of the emission control transistor, the switching transistor, and the first initialization transistor includes a dual gate electrode.