Corner-Connected Force Sensors for Narrow Display Frames
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Solution Overview
Problem
Conventional silicon-based force sensors used in touch-controlled display panels are rectangular and large in size, leading to a wider frame that restricts the display panel's narrowness and affects detection accuracy due to temperature-induced resistance changes.
Innovation Solution
The force sensors are redesigned with signal input and output connections at the corners instead of the sides, increasing the contributing area to the sides, reducing the sensor's size while maintaining performance, and improving detection accuracy by minimizing temperature interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If conventional silicon-based force sensors are used with signal input/output parts on opposite sides, then the sensor structure is simple, but the sensor size is large which increases frame width
Solution Approach 1:
The patent inverts the conventional signal connection arrangement by placing signal input and output parts on adjacent sides rather than opposite sides, which fundamentally changes the current path through the sensor and reduces the required sensor dimensions while maintaining functionality
Solution Approach 2:
The patent transitions from a one-dimensional signal path (across the sensor) to a two-dimensional signal path (along the perimeter), utilizing the boundary regions of the sensor to create multiple current paths that increase sensitivity without requiring larger sensor area
2Length of moving object
If the force sensor size is reduced to narrow the frame, then the frame width is reduced, but the detection accuracy may be compromised
Solution Approach 1:
The patent concentrates the signal input and output parts in specific corner regions of the sensor, creating localized high-sensitivity zones where stress concentration occurs during touch, thereby maintaining detection accuracy in a reduced-size sensor
Solution Approach 2:
The patent divides the signal transmission path into multiple segments along the sensor perimeter, with separate input and output parts at different corners, creating multiple independent measurement channels that enhance overall detection precision
3Measurement precision
If signal input and output parts are placed on opposite sides, then wiring is simpler, but temperature-induced resistance changes affect detection accuracy
Solution Approach 1:
The patent introduces corner regions as intermediary zones that mediate between the signal input and output parts, allowing the signal to traverse through regions that are less susceptible to temperature-induced resistance changes while maintaining electrical connectivity
Solution Approach 2:
The patent pre-positiones the signal input and output parts at corner locations where the geometric configuration naturally compensates for temperature effects, establishing a thermally stable measurement baseline before actual force detection begins
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 configuration reduces the display panel's frame width, enhances detection precision, and minimizes the impact of temperature on sensor performance, allowing for more precise force measurement.
Implementation Method 1
a silicon-based force sensor is rectangle shaped and has a larger size
Data Source
AI summary
The present disclosure provides a display substrate, a display panel and a display device. The display substrate includes a display region and a peripheral region surrounding the display region. Silicon-based force sensors are provided in the peripheral region. Each of the force sensors is rectangle-shaped and has a first side, a second side, a third side and a fourth side interconnected end-to-end. A first signal input part is electrically connected at a first corner formed between the first side and the second side, a first signal output part is electrically connected at a second corner formed between the second side and the third side, a second signal input part is electrically connected at a third corner formed between the third side and the fourth side, and a second signal output part is electrically connected at a fourth corner formed between the fourth side and the first side.