Cover Glass Haptic Actuation with Mechanical Insulation
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Solution Overview
Problem
Existing visual display devices for motor vehicles require a powerful actuator to transmit haptic feedback, which increases installation space, power consumption, and noise interference, and is costly.
Innovation Solution
A visual display device with mechanical insulation between the display module and cover glass, using a low-mass actuator that excites movement in the cover glass for haptic feedback, decoupling the display module and reducing noise interference, and incorporating a flexible adhesive bonding for improved stability and legibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a powerful actuator is used to transmit haptic feedback through multiple components to the cover glass, then haptic feedback quality is improved, but installation space increases, power consumption increases, and costs increase
Solution Approach 1:
The patent extracts the actuator from the traditional transmission path and places it directly on the cover glass. This eliminates the need for complex mechanical transmission components (gears, belts, linkages) that would otherwise be required to transmit haptic feedback from a remote actuator to the cover glass surface, thereby significantly reducing installation space while maintaining haptic feedback quality
Solution Approach 2:
The patent introduces a mechanical insulation layer as an intermediary between the display module and the cover glass. This insulation layer isolates the actuator's haptic feedback vibrations from the display module, preventing noise interference while allowing the actuator to directly excite the cover glass for effective haptic feedback transmission
2Reliability
If a powerful actuator is used to transmit haptic feedback, then haptic feedback quality is improved, but power consumption increases
Solution Approach 1:
By extracting the actuator and placing it directly on the cover glass, the system eliminates energy losses associated with mechanical transmission through multiple components. The actuator directly excites the cover glass, requiring less power to achieve the same haptic feedback effect compared to a powerful remote actuator that must overcome transmission losses
Solution Approach 2:
The mechanical insulation layer acts as a mediator that prevents energy loss through unwanted vibrations in the display module and dashboard. By isolating the actuator's vibrations, the system reduces energy dissipation and achieves efficient haptic feedback with lower power consumption
3Reliability
If a powerful actuator is used to transmit haptic feedback, then haptic feedback quality is improved, but noise interference increases
Solution Approach 1:
The mechanical insulation layer serves as a mediator that blocks the transmission of vibrations from the actuator to the display module and dashboard. This insulation prevents the generation of noise interference while allowing the actuator to effectively excite the cover glass for haptic feedback, thus resolving the contradiction between haptic feedback quality and noise interference
Solution Approach 2:
By extracting the actuator from the traditional mounted position and placing it directly on the cover glass, the system eliminates the mechanical transmission path that would otherwise transmit vibrations to the display module and dashboard, thereby preventing noise interference while maintaining haptic feedback quality
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 reduces noise interference, minimizes installation space and power requirements, enhances user feedback, and improves display legibility and safety by efficiently transmitting haptic feedback with reduced energy consumption.
Implementation Method 1
The mechanical insulation may absorb the movement energy of the excited movement and dampen said movement
Implementation Method 2
The mechanical insulation preferably comprises a viscous medium, in particular a low-viscosity medium
Implementation Method 3
A lateral movement of the cover glass is generated by way of the actuator. A lateral movement may be perceived by a user particularly well as haptic feedback. The movement excited by the actuator may be perceived by a user as vibration
Implementation Method 4
The flexible bonding consists, for example, of a low-viscosity medium and an adhesive. The adhesive preferably likewise has a low viscosity or forms, together with the low-viscosity medium, a flexible bonding with low viscosity
Data Source
AI summary
A display device for representing information on a display includes at least one display module and at least one cover glass, wherein mechanical insulation is arranged between the display module and the cover glass, and at least one actuator is designed to induce a movement of the display.