Resistive Touch Panel Multi-Touch via Pressure Threshold Detection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional resistive touch panels are limited to single-touch functionality, whereas capacitive touch panels achieve multi-touch functions but are complex and costly, lacking the ability to perform functions like zooming and screen movement with ease.
Innovation Solution
A multi-touch controlled apparatus and method utilizing a resistive touch display interface that generates position and pressure signals, determining if the pressure exceeds a threshold to execute actions such as zooming or screen movement based on the moving direction between two touch points.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a capacitive touch panel is used to achieve multi-touch function, then multi-touch capability is improved, but device complexity and cost increase
Solution Approach 1:
The patent applies the copying principle by using a resistive touch panel that mimics the multi-touch functionality of capacitive touch panels. Instead of implementing the complex capacitive sensing circuitry, the invention creates a resistive panel that generates position and pressure signals equivalent to what capacitive panels produce, thereby achieving multi-touch capability with simpler, less expensive resistive technology
Solution Approach 2:
The patent employs parameter changes by utilizing pressure signal thresholds to differentiate between single-touch and multi-touch operations. By monitoring pressure levels and changes in position coordinates, the system transforms the resistive panel's basic touch signals into multi-touch capable commands, enabling zooming, panning, and other multi-touch gestures without changing the fundamental resistive technology
2Device complexity
If a resistive touch panel is used to reduce cost and simplify structure, then device complexity is reduced, but multi-touch function is lost
Solution Approach 1:
The patent applies dynamics by introducing temporal and pressure-based variations to resistive touch signals. By detecting pressure magnitude, pressure changes over time, and sequential position changes, the system dynamically interprets single touch events as either single-touch or multi-touch operations, enabling multi-touch functionality while maintaining the simple static structure of the resistive panel
Solution Approach 2:
The patent adds another dimension by incorporating pressure signal analysis alongside position coordinate detection. This vertical addition of pressure dimension to the existing two-dimensional position tracking enables the system to distinguish between single and multi-touch events, effectively adding multi-touch capability without adding physical touch sensors
3Adaptability or versatility
If pressure threshold detection is added to enable multi-touch, then multi-touch capability is improved, but processing complexity increases
Solution Approach 1:
The patent applies preliminary action by pre-establishing pressure thresholds and decision trees in the processing logic. The system is programmed with predetermined pressure levels that distinguish single-touch from multi-touch events, and pre-defined response protocols for different gesture types (zooming, panning, etc.), thereby simplifying real-time processing through advance preparation of decision criteria
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 multi-touch functionality similar to capacitive touch panels while reducing costs and improving user convenience by allowing two-point touch and one-point moving operations, enhancing the usability of resistive touch devices.
Implementation Method 1
generating a first position signal and a pressure signal while a resistive touch display is being touched
Data Source
AI summary
The present invention discloses a multi-touch controlled apparatus and the method thereof. The method of multi-touch control includes the steps of: touching a resistive touch display interface to generate a first position signal and a pressure signal; determining whether or not the pressure signal is greater than a predetermined pressure threshold; recording a first position signal and a second position signal if the pressure signal is greater than the predetermined pressure threshold; determining whether or not a moving direction from the first position signal towards the second position signal is the predetermined moving direction; and issuing an instruction to execute a predetermined action, if the moving direction from the first position signal towards the second position signal is the predetermined moving direction.