Force Sensing Display Sequential Sensor Driving
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Solution Overview
Problem
Existing force sensing display devices suffer from reduced touch sensitivity and increased manufacturing complexity due to parallel connections of force sensing sensors and load resistors, leading to inaccurate force calculations and higher production costs.
Innovation Solution
A force sensing display device design where a driving signal is sequentially supplied to at least two force sensing sensors, using a force sensing unit to sense forces by sequentially receiving sensing signals from the sensors, reducing cross-influence between sensors and simplifying the circuit with fewer load resistors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If force sensing sensors are connected in parallel to the driver, then all sensors receive the driving signal simultaneously, but the sensing signal from one sensor is affected by driving signals supplied to other sensors, reducing touch sensitivity
Solution Approach 1:
The driver sequentially supplies driving signals to force sensing sensors in time-division multiplexing fashion rather than simultaneously. The controller receives sensing signals in sequence and calculates forces based on these sequential measurements, eliminating cross-interference between sensors while maintaining operational capability.
2Reliability
If load resistors are connected between each force sensing sensor and ground, then the circuit can function properly, but the configuration becomes complicated and manufacturing cost increases
Solution Approach 1:
The patent eliminates individual load resistors for each sensor by merging the grounding function into a common reference potential. The sequential driving method allows the circuit to function without separate load resistors, simplifying the configuration and reducing manufacturing complexity while maintaining proper circuit operation.
Solution Approach 2:
The patent removes the unnecessary load resistors from the circuit configuration. By extracting these redundant components and relying on the sequential driving method and common reference potential, the circuit achieves proper functionality with reduced complexity and lower manufacturing cost.
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
Enhances touch sensitivity by accurately calculating forces applied to individual sensors and simplifies the manufacturing process and costs by reducing the complexity of the circuit and number of load resistors.
Implementation Method 1
Force sensing panels may be categorized into capacitive force sensing panels using a variation of a capacitance
Implementation Method 2
resistive force sensing panels using a variation of a resistance
Data Source
AI summary
Disclosed is a force sensing display device which sequentially supplies a driving signal to at least two force sensing sensors and senses forces pressing the force sensing sensors by using sensing signals sequentially received from the force sensing sensors. The force sensing display device includes a panel including a plurality of gate lines and a plurality of data lines, a gate driver driving the plurality of gate lines, a data driver driving the plurality of data lines, a controller controlling the gate driver and the data driver, a force sensing panel disposed adjacent to the panel and including at least two force sensing sensors, and a force sensing unit sequentially supplying a driving signal to the at least two force sensing sensors and sensing forces respectively pressing the at least two force sensing sensors by using sensing signals sequentially received from the force sensing panel.