Oxide Semiconductor Capacitor Noise Filtering in Display Devices
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Solution Overview
Problem
Semiconductor devices, particularly display devices, face issues with noise-induced malfunctions and circuit damage due to conductive and emission noise, which existing protective measures inadequately address.
Innovation Solution
Incorporating a capacitor formed using a conductive layer, an oxide semiconductor layer, and an insulating layer to create a filter circuit that reduces noise effects by filtering signals through a resistor and capacitor combination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If protective means against noise are provided in display devices, then reliability is improved, but device complexity increases
Solution Approach 1:
The patent combines the protective circuit functionality with the existing pixel circuit components by sharing the capacitor and wiring structures. The capacitor that is already present in the pixel circuit is utilized for both its original function and for noise filtering, merging two functions into a single component structure.
Solution Approach 2:
The capacitor in the pixel circuit serves dual purposes: maintaining the display signal voltage and filtering noise. The same wiring structures are used for both signal transmission and as part of the protective circuit, making the components universal and multi-functional.
2Reliability
If filter circuit is added to reduce noise effects, then reliability is improved, but manufacturing complexity increases
Solution Approach 1:
The filter circuit is merged with the existing pixel circuit structure by utilizing the same capacitor and wiring. No separate filter circuit components are manufactured independently, thereby avoiding additional manufacturing steps while achieving noise filtering functionality.
3Reliability
If capacitor is formed using conductive layer and oxide semiconductor layer, then noise filtering is improved, but manufacturing precision requirements increase
Solution Approach 1:
The capacitor for noise filtering is formed using the same conductive layer and oxide semiconductor layer that constitute the pixel circuit components. The layer formation processes are combined, so the same deposition and etching steps create both the pixel circuit elements and the filtering capacitor, eliminating the need for separate precision alignment processes.
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 solution effectively reduces adverse noise effects on the operation of semiconductor devices, enhancing their reliability and performance by controlling signal delays based on input voltage levels.
Implementation Method 1
a capacitor formed using a conductive layer, an oxide semiconductor layer, and an insulating layer
Implementation Method 2
filtering with the use of a filter circuit formed using the capacitor and a resistor
Data Source
AI summary
To reduce adverse effects on actual operation and to reduce adverse effects of noise. A structure including an electrode, a wiring electrically connected to the electrode, an oxide semiconductor layer overlapping with the electrode in a plane view, an insulating layer provided between the electrode and the oxide semiconductor layer in a cross-sectional view, and a functional circuit to which a signal is inputted from the electrode through the wiring and in which operation is controlled in accordance with the signal inputted. A capacitor is formed using an oxide semiconductor layer, an insulating layer, and a wiring or an electrode.