Display Sensor Core for Strain Monitoring
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Solution Overview
Problem
Electronic displays face operational issues due to excessive strain, leading to visual artifacts and resistance changes in components, which are not effectively monitored after manufacturing when strain gauge devices are removed.
Innovation Solution
Incorporating a universal integrated sensor core within the display circuitry that shares sensing capabilities between Wheatstone bridge and current divider sensors, allowing the controller to adjust operations based on sensed strain, ensuring uniform image presentation and compensating for resistance changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If strain gauge devices are removed after manufacturing, then manufacturing cost and device complexity are reduced, but the ability to detect strain during operation is lost
Solution Approach 1:
The sensor core is designed to perform multiple functions: it can detect strain during manufacturing calibration and continue to detect strain during operational calibration. This multi-functional design eliminates the need for separate strain gauge devices while maintaining continuous strain detection capability throughout the display's lifecycle.
Solution Approach 2:
The display system performs its own calibration at multiple stages - initial manufacturing calibration and operational calibration - using the integrated sensor core. This self-service approach eliminates dependency on external strain gauge devices while ensuring accurate strain compensation throughout operation.
2Device complexity
If a single sensor core is used for multiple sensing circuits, then device complexity is reduced, but measurement precision may be compromised
Solution Approach 1:
The sensor core is designed as a universal measurement unit that can accurately measure different physical quantities (strain, temperature, pressure) through multiple sensing circuits. The single sensor core maintains high measurement precision by implementing separate signal processing paths for each sensing circuit while sharing common control and calibration resources.
Solution Approach 2:
Multiple sensing circuits (Wheatstone bridge, current divider) are merged into a single integrated sensor core that handles all measurements. This consolidation reduces device complexity while maintaining precision through shared calibration data and coordinated signal processing across all sensing circuits.
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
This solution enables continuous strain detection and adjustment within the display, reducing visual artifacts and improving operational stability by using a single sensor core to manage multiple strain detection circuits, enhancing manufacturing efficiency and operational accuracy.
Implementation Method 1
a strain gauge at least partially disposed within an active area of the display to detect when strain is applied to the display circuitry
Implementation Method 2
Systems to detect stress applied to a display may sometimes include a Wheatstone bridge sensor
Implementation Method 3
Systems to detect stress applied to a display may sometimes include a current divider sensor
Data Source
AI summary
A system may include a display driven using display driving circuitry to present an image via pixels. The display driving circuitry may include a sensor core compatible with one or more strain sensing circuits. The same sensor core may be used by a control system of the display to sense a stress applied to a strained region of a display using a current divider sensing circuit and/or a Wheatstone bridge sensing circuit.