Tactile Touch Panel Haptic Feedback via Blanking Interval Voltage
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Solution Overview
Problem
Existing touch screen technologies face challenges in providing effective haptic feedback on capacitance-type touch screen panels without interfering with touch operations, as the electric field generated by tactile images can block touch operations.
Innovation Solution
A method and apparatus that apply a tactile voltage corresponding to an image on a tactile touch panel during blanking intervals when the touch driving voltage is not applied, using a phase inversion strategy to prevent electric field interference and enable seamless touch operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a tactile voltage is applied continuously to provide haptic feedback, then the haptic feedback function is improved, but touch operations are blocked by the generated electric field
Solution Approach 1:
The patent applies tactile voltage periodically during blanking intervals rather than continuously. The controller alternates between applying tactile voltage for haptic feedback and suspending it to prevent touch operation blocking, creating a periodic action pattern that resolves the contradiction between maintaining haptic feedback reliability and preventing touch operation interference
Solution Approach 2:
The patent applies tactile voltage in advance during blanking intervals before the next touch sensing period begins. By preparing the haptic feedback effect beforehand during the blanking interval when touch sensing is not occurring, the system ensures haptic feedback is delivered without interfering with subsequent touch operations
2Speed
If tactile voltage is applied during active display intervals, then haptic feedback responsiveness is improved, but touch sensing accuracy deteriorates due to electric field interference
Solution Approach 1:
The system applies tactile voltage in advance during blanking intervals before the active display interval begins. This preliminary action ensures haptic feedback is delivered with sufficient responsiveness while the electric field is suspended during the active interval when touch sensing occurs, thereby maintaining touch sensing accuracy without compromising haptic feedback speed
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
The solution effectively prevents touch operations from being blocked by the electric field generated by tactile images, allowing for enhanced haptic feedback and improved user interaction on capacitance-type touch screen panels.
Implementation Method 1
a tactile voltage corresponding to an image to be displayed may be applied to the tactile touch panel
Implementation Method 2
touch screen panel of a capacitance type
Data Source
AI summary
A method for representing a tactile image and providing a touch function and a haptic feedback function to a tactile touch panel includes: applying a touch driving voltage to the tactile touch panel; and applying a tactile voltage corresponding to an image to be displayed to the tactile touch panel in a blanking interval when the touch driving voltage may be not applied to a plurality of touch driving lines of the tactile touch panel, when a touch sensing voltage corresponding to a touch on the tactile touch panel may be received through a plurality of touch sensing lines of the tactile touch panel.