Vehicle Display Haptic Isolation for Precise Touch Execution
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Solution Overview
Problem
Vehicle display devices face challenges in accurately executing user intentions due to weak touch vibration and noise transfer, leading to unintended application execution and reduced haptic feedback.
Innovation Solution
A vehicle display control device with a housing, LCD cover, haptic actuator, and support member, featuring a touch unit with indium tin oxide (ITO) and adhesive members, and a sensing part using infrared rays to calculate touch pressure, ensuring precise application execution and clear vibration transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the LCD module is firmly fixed to the vehicle to prevent separation, then stability is improved, but touch vibration intensity is reduced and noise is transferred to the instrument panel
Solution Approach 1:
A vibration isolation member is introduced as an intermediary component between the LCD module and the instrument panel. This member selectively transmits touch vibrations generated by user interaction while blocking the transmission of operational noise and vibration from the panel to the display, thereby resolving the contradiction between stability and noise reduction
Solution Approach 2:
The vibration isolation member exhibits different mechanical properties for different types of vibrations: it allows high-frequency touch vibrations to pass through to maintain haptic feedback quality, while absorbing and isolating low-frequency operational noise from the instrument panel, achieving local quality differentiation in vibration transmission
2Reliability
If the LCD module is firmly fixed to the vehicle to prevent separation, then reliability is improved, but touch vibration transfer is weakened
Solution Approach 1:
The vibration isolation member serves as a mediator that differentially transmits vibration forces: it permits the transmission of intentional touch vibrations generated by user interaction to maintain haptic feedback, while blocking the transmission of unwanted operational vibrations from the instrument panel, thus preserving reliability without compromising touch vibration quality
3Ease of operation
If a haptic device is added to generate vibration, then user experience is improved, but device complexity increases
Solution Approach 1:
The LCD module's own structure and the vibration isolation member work together to provide haptic feedback. When a user touches the display, the natural vibration of the LCD module is transmitted through the vibration isolation member to the user's finger, creating a self-service haptic feedback system that enhances user experience without requiring separate haptic actuator components
Solution Approach 2:
Instead of adding complex haptic generation components, the system recovers and utilizes the natural vibration characteristics of the LCD module itself during touch interaction. The vibration isolation member captures and transmits these inherent vibrations to the user, converting a potential loss into a useful haptic feedback mechanism
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 precise execution of desired applications and effective transfer of touch vibrations, minimizing noise and unintended information output, while enhancing user experience through improved haptic feedback.
Implementation Method 1
When a driver or a passenger presses the cover glass, a voltage is generated in the actuator film by a piezoelectric effect
Implementation Method 2
a sensing part that is mounted on each of the rear of the LCD cover and a bottom surface of the housing and senses a degree of pressurization of the LCD module
Data Source
AI summary
A vehicle display control device including a housing that constitutes a body and is fixed to an instrument panel, an LCD cover whose outer circumference surface is disposed to be spaced apart from an inner circumference surface of the housing and that is accommodated in the housing, an LCD module that is accommodated in the LCD cover and covered by the LCD cover, a haptic actuator that is mounted on a rear of the LCD cover and transfers vibration to the LCD cover, and a support member that is disposed between the LCD cover and the housing.