Stylus Tip Haptic Feedback via Localized Vibration
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Solution Overview
Problem
Existing handheld input devices, such as styluses, fail to effectively provide haptic feedback when used with touch-based systems, as the feedback is not directly conveyed to the user when the stylus tip is not in contact with the device surface, leading to inadequate user experience and increased power consumption due to broader haptic feedback mechanisms.
Innovation Solution
A stylus with integrated force-sensing and haptic feedback systems that detect user input and provide targeted tactile sensations at the tip, simulating texture and other sensations by moving the tip relative to the housing, allowing for precise haptic feedback without the need for broader device-wide haptic components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If haptic feedback is provided through the touch panel surface, then the user can perceive tactile feedback, but the feedback is not directly conveyed to the user when the stylus tip is not in contact with the surface and power consumption increases due to broader haptic feedback mechanisms
Solution Approach 1:
The patent applies local quality by providing haptic feedback specifically at the stylus tip rather than through the entire touch panel surface. The haptic actuator is integrated into the stylus body to generate localized vibrations and tactile sensations at the tip, allowing targeted feedback only where needed during stylus interaction with the touch panel.
Solution Approach 2:
The stylus tip acts as an intermediary between the user's hand and the touch panel surface. The haptic actuator generates vibrations that are transmitted through the stylus body to the tip, providing tactile feedback without requiring direct contact between the user's finger and the haptic feedback source. This mediator approach enables effective feedback while reducing overall power consumption.
2Reliability
If haptic feedback is provided across the entire device, then comprehensive tactile feedback is achieved, but device complexity and component size increase
Solution Approach 1:
Instead of implementing haptic feedback across the entire device, the patent concentrates the haptic feedback function at the stylus tip. A single haptic actuator integrated into the stylus body provides localized tactile feedback, significantly reducing the complexity and size of haptic components compared to device-wide implementation.
Solution Approach 2:
The haptic feedback system is segmented from the main device and integrated into the stylus as a separate, self-contained unit. This segmentation allows the haptic feedback functionality to be independently optimized and reduces the overall device complexity by eliminating the need for extensive haptic components in the main device body.
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 enables accurate simulation of writing on textured surfaces with reduced power consumption by providing haptic feedback directly at the stylus tip, enhancing user experience and input accuracy while minimizing the need for extensive haptic feedback systems.
Implementation Method 1
the haptic feedback can be provided at the tip to render texture sensations to simulate drawing on a textured surface with the stylus
Data Source
AI summary
A stylus can include a housing and a tip. A force-sensing system can detect movement of the tip relative to the housing when a force is applied to the tip. A haptic feedback system can move the tip relative to the housing, for example by inducing a magnetic field in magnetic elements connected to the tip and the housing. The haptic feedback can be used to render texture sensations to simulate drawing on a textured surface with the stylus. As such, the same tip that is used to provide inputs can receive haptic feedback during use. The user can continue to use the tip for input even as haptic feedback is also being applied to the tip.