Hinged Dual-Display Touch Calibration at Variable Angles

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Solution Overview

Problem

Hinged computing devices with dual touch-sensitive displays face operational challenges due to capacitive touch sensor malfunctions and visual disruptions from mechanical hinges, particularly when displays are close together, leading to false touches and impaired content presentation.

Innovation Solution

The computing device employs capacitive touch sensors with real-time calibration and hinge angle detection using potentiometers or IMUs, intermittent run-time calibration based on hinge angle, and simulated gap display modes to mitigate interference and enhance visual coherence.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If displays are positioned close together in hinged configuration, then device portability and flexibility are improved, but capacitive touch sensor interference increases causing false touches

Engineering Contradiction:

Improvedevice flexibilityVSAvoidtouch sensor accuracy

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The system performs preliminary calibration of touch sensors at different hinge angles before normal operation. Calibration data is stored in advance for various configurations, allowing the system to compensate for capacitive interference proactively rather than reactively when false touches occur.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The system dynamically adjusts touch sensor calibration parameters based on detected hinge angle. By changing electrical parameters (capacitance thresholds, sensitivity settings) according to the physical configuration, the system adapts to varying levels of capacitive interference at different display orientations.

Inventive Principle:

Principle #35Parameter changes

2Device complexity

If mechanical hinge is used to connect displays, then device structure is simplified, but visual disruption and content coherence are worsened

Engineering Contradiction:

Improvestructure simplicityVSAvoidvisual disruption

Core Design Contradiction:

Device complexityVSObject-affected harmful factors

Solution Approach 1:

The system introduces a simulated gap as a visual intermediary between displays. This virtual boundary layer compensates for the physical hinge's visual presence by creating a perceptual separation that maintains content coherence, allowing the mechanical hinge to remain while its visual disruption is mitigated through software rendering.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The system dynamically adjusts display brightness, contrast, and color parameters across the hinge region to create visual continuity. By modifying optical properties of adjacent display areas, the system masks the hinge's visual disruption and maintains coherent content presentation across folded configurations.

Inventive Principle:

Principle #32Color changes

3Measurement precision

If continuous touch sensor calibration is performed, then touch detection accuracy is improved, but power consumption increases

Engineering Contradiction:

Improvetouch detection accuracyVSAvoidpower consumption

Core Design Contradiction:

Measurement precisionVSUse of energy by moving object

Solution Approach 1:

Instead of continuous calibration, the system performs touch sensor calibration periodically at specific hinge angles and configurations. Calibration is triggered by discrete events such as hinge angle thresholds or user interaction patterns, reducing unnecessary calibration operations while maintaining adequate touch detection accuracy throughout device usage.

Inventive Principle:

Principle #19Periodic action

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 approach reduces false touches and improves visual presentation by adjusting touch sensor calibration and display modes based on hinge angle, ensuring accurate touch detection and coherent content display across varying configurations.

Implementation Method 1

a first capacitive touch sensor positioned on the first display device and configured to detect a first touch input

Methodology Applied

Scientific EffectCapacitance: Capacitance

Implementation Method 2

a hinge angle sensor positioned in the hinge and configured to detect the hinge angle between the first display surface and the second display surface

Methodology Applied

Scientific EffectPotentiometer measurement:

Implementation Method 3

hinge angle detection using potentiometers or IMUs

Methodology Applied

Scientific EffectIMU (Inertial Measurement Unit): Accelerometer

Data Source

PatentEP4211534B1Hinged dual display computing device

Publication Date: 2025.09.10 MICROSOFT TECHNOLOGY LICENSING LLC

Figure 1A~1E
Figure 2A~2B
Figure 3

AI summary

A computing device is provided comprising a processor, a first display device having a first capacitive touch sensor, a second display device having a second capacitive touch sensor, and a hinge positioned between and coupled to each of the first display device and the second display device, the first display device and second display device being rotatable about the hinge and separated by a hinge angle. The processor is configured to detect the hinge angle at a first point in time, determine that the hinge angle at the first point in time is outside a first predetermined range, and upon at least determining that the hinge angle is outside the first predetermined range, perform run-time calibration of at least a plurality of rows of the capacitive touch sensor of the first display device and of the capacitive touch sensor of the second display device.