Touch Display Haptic Feedback With Vibration-Resistant Displacement Control
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Solution Overview
Problem
Conventional touch panel devices face challenges in suppressing the effect of vibrations, particularly when mounted on vehicles, which can affect components susceptible to vibrations, leading to unintended detection and feedback issues.
Innovation Solution
A display device with a touch panel, sensor, actuator, and control device that allows the display part to be displaceable between a restriction and allowance position, where the control device holds the display in the restriction position until a user operation is detected, allowing it to transition to the allowance position and vibrate when necessary, thereby minimizing the impact of external vibrations on sensitive components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the display part is made displaceable to enable vibration feedback, then force feedback functionality is improved, but the display part becomes susceptible to unwanted vibrations from external sources
Solution Approach 1:
The display part is designed to be dynamically switchable between two states: a first state where displacement is restricted (suppressing unwanted vibrations) and a second state where displacement is permitted (enabling vibration feedback). This dynamic state change allows the system to adapt to different operational requirements, resolving the contradiction between needing vibration capability and avoiding unwanted vibrations.
Solution Approach 2:
The system periodically switches the display part between restricted and permitted displacement states based on detected user input. When touch input is detected, the system transitions to permitting displacement for feedback; when no input is detected, it restricts displacement to prevent unwanted vibrations. This periodic switching resolves the contradiction by applying the appropriate state at the appropriate time.
2Reliability
If the display part is restricted to prevent vibrations, then detection accuracy is improved, but force feedback capability is lost
Solution Approach 1:
The system dynamically adjusts the displacement restriction based on operational context. During periods without detected user input, the display part maintains restricted displacement for accurate detection. Upon detecting user input, it dynamically transitions to permit displacement, enabling force feedback while maintaining detection accuracy during non-interactive periods.
Solution Approach 2:
The system implements periodic evaluation of user input and相应调整 displacement restriction. It alternates between restricted mode (for accurate detection) and permitted mode (for feedback delivery) based on the periodic detection of user interactions, thus resolving the contradiction between these two requirements.
3Object-affected harmful factors
If the display part is held in restriction position continuously, then vibration interference is suppressed, but user interaction responsiveness is reduced
Solution Approach 1:
The system prepares by detecting user input in advance and proactively transitions the display part from restricted to permitted displacement state before actual interaction occurs. This preliminary detection and proactive state change ensures rapid response to user input while maintaining vibration suppression during non-interactive periods.
Solution Approach 2:
The system periodically monitors for user input and rapidly transitions between restricted and permitted states. This periodic monitoring with rapid state switching ensures that the system remains responsive to user interactions while spending most time in the restricted state to suppress vibration interference, thus resolving the contradiction between suppression and responsiveness.
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
Effectively suppresses the effect of vibrations on sensitive components, preventing intermittent activation and ensuring accurate user input detection while providing necessary feedback through controlled vibration.
Implementation Method 1
an actuator that vibrates the display part
Data Source
Figure 1
Figure 2(A)~2(B)
Figure 3(A)~3(B)
AI summary
A display device 1 is provided with a display part 2, a display surface 22a of which is covered with a touch panel 21, a sensor 7 that detects a displacement of the display part 2 by an operation of the touch panel 21, a solenoid 8 that vibrates the display part 2, and a control device 10 configured to control the solenoid 8. In the display device 1, the control device 10 vibrates the display part 2 by the solenoid 8 when the displacement of the display part 2 is detected. The display part 2 is displaceable between a restriction position for restricting the displacement thereof and an allowance position for allowing the displacement thereof, by the solenoid 8. The control device 10 holds the display part 2 in the restriction position, and displaces the display part 2 from the restriction position to the allowance position when the operation for the operation of the touch panel 21 is detected.