Pressure-Sensitive Panel With Segmented Resistive Units
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Solution Overview
Problem
Conventional touch display panels can only detect screen coordinates but not pressing force, limiting their functionality and application in touch operations.
Innovation Solution
A pressure-sensitive panel with resistors and voltage detection units on a substrate, where resistors are connected in specific configurations to detect changes in resistance and voltage when pressed, allowing for the determination of pressing force through voltage differences.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional touch display panels are used, then the structure is simple and manufacturing is easy, but pressing force cannot be detected
Solution Approach 1:
The pressure-sensitive layer is divided into multiple pressure-sensitive units distributed across the substrate. Each unit independently detects pressing force at its location, enabling comprehensive force detection across the entire panel while maintaining a modular structure that balances functionality with manageable complexity
Solution Approach 2:
The resistors in each pressure-sensitive unit serve multiple functions: they form part of the voltage division circuit for detection and simultaneously act as pressure-sensitive elements whose resistance changes with applied force. This multi-functionality reduces the need for separate sensing components, thereby limiting the increase in device complexity
2Adaptability or versatility
If pressure-sensitive units with resistors and voltage detection are added, then pressing force can be detected, but device complexity increases
Solution Approach 1:
The detection circuit merges the voltage division function and pressure detection function into a single integrated structure. The resistors serve both as circuit elements for voltage division and as pressure-sensitive elements, combining multiple functions into unified components that reduce overall circuit complexity
Solution Approach 2:
The pressure-sensitive units utilize their own resistance changes in response to pressure as the detection mechanism. The change in resistance directly produces a voltage signal that can be detected, eliminating the need for separate sensing mechanisms and reducing system complexity while enhancing versatility
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 the detection of pressing force during touch operations, enhancing the touch experience by providing richer interaction capabilities.
Implementation Method 1
each pressure-sensitive unit includes two resistors and a first voltage detection unit; the two resistors are elongated or elliptical
Implementation Method 2
the first voltage detection unit is connected with a connecting end between the first resistor and the second resistor and configured to detect a voltage at the connecting end
Data Source
AI summary
The present disclosure provides a pressure-sensitive panel and a detection method thereof, a 3D touch panel and a touch display panel. The pressure-sensitive panel includes a pressure-sensitive layer. The pressure-sensitive layer includes a plurality of pressure-sensitive units, and each pressure-sensitive unit includes four resistors, a first voltage detection unit and a second voltage detection unit. The four resistors of each pressure-sensitive unit are connected with each other in sequence; two short sides of the first resistor are respectively connected with one long side of the second resistor and the fourth resistor; and two short sides of the third resistors are connected with the other long side of the second resistor and the fourth resistor. A connecting end between the first resistor and the fourth resistor is connected with a first fixed voltage end, and a connecting end between the second resistor and the third resistor is connected with a second fixed voltage end. The first voltage detection unit is connected with a connecting end between the first resistor and the second resistor, and the second voltage detection unit is connected with a connecting end between the third resistor and the fourth resistor. The pressure-sensitive panel can detect the pressing force of a user.