Integrated Sensor TFT Structure for Flexible Display Bending
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Solution Overview
Problem
Flexible display devices face challenges in sensing bending and pressure as input signals due to increased manufacturing costs and complexity from separately attaching sensors, which complicates the manufacturing process and limits portability.
Innovation Solution
A display device with sensors integrated at the same vertical level as thin film transistors, utilizing a deformation layer and drive electrodes to measure sensing voltage changes, allowing for the detection of substrate bending and pressure without additional manufacturing steps.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Difficulty of detecting and measuring
If sensors are separately attached to the display device to sense bending and pressure, then sensing capability is improved, but manufacturing cost and process complexity increase
Solution Approach 1:
The patent merges the sensor structure with the thin film transistor structure by forming the sensor at substantially the same vertical level as the thin film transistor. The deformation layer is integrated with the active layer, and the drive electrode is integrated with the gate electrode, allowing both sensing and transistor functions to be achieved through a unified manufacturing process without separate sensor attachment steps
Solution Approach 2:
The patent creates a multi-functional structure where the same layers serve dual purposes: the active layer functions as both the transistor's active layer and the sensor's deformation layer, while the gate electrode serves as both the transistor's gate electrode and the sensor's drive electrode. This universal design allows the display device to perform both switching and sensing functions through a single integrated structure
2Measurement precision
If sensors are separately attached to the display device, then sensing precision is improved, but device complexity increases
Solution Approach 1:
The patent combines multiple functions into a single integrated structure where the sensor and thin film transistor share the same vertical level and manufacturing process. The deformation layer is formed simultaneously with the active layer, and both structures utilize the same electrode configurations, thereby reducing device complexity while maintaining sensing precision
Solution Approach 2:
The integrated structure performs multiple functions simultaneously: the deformation layer serves as both the transistor's active layer and the sensor's sensing element, while the gate electrode serves as both the transistor's control electrode and the sensor's drive electrode. This multi-functionality reduces the number of separate components and assembly steps required
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
Enables efficient sensing of substrate bending and pressure as input signals, reducing manufacturing costs and processes while enhancing portability and operational capabilities.
Implementation Method 1
a deformation layer formed on substantially the same layer as the active layer... to sense bending of the substrate and pressure that is applied to the substrate
Data Source
AI summary
A display device and a method for driving the same are disclosed. In one aspect, the display device includes a plurality of pixels defined on a substrate and a sensor formed in at least one of the plurality of pixels and adjacently arranged at the same vertical level as that of a thin film transistor formed on the substrate to sense bending of the substrate and pressure that is applied to the substrate.