Vehicle Display Assembly With Air-Gap Mounting for Optical Stability
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Solution Overview
Problem
Existing display devices for vehicles face challenges in achieving sufficient stability and strength without surface bonding to the housing shell, as TFT displays are sensitive to mechanical stresses and show optical abnormalities when firmly glued to uneven surfaces.
Innovation Solution
A display device design featuring a rear housing shell with a rising edge bar connected to a decorative frame via adhesive, creating an air gap between the display and the housing shell, with the display mounted to a cover pane using a transparent adhesive, allowing for mechanical stability and tolerance compensation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the display is firmly glued to the rear wall of the housing shell, then the attachment stability is improved, but the display shows optical abnormalities due to mechanical stresses on uneven surfaces
Solution Approach 1:
The housing shell is segmented into a rear wall and an edge bar that protrudes forward. The display is mounted on the cover pane rather than directly on the rear wall, creating a separated mounting structure that isolates the display from the rear wall's surface imperfections while maintaining overall attachment stability.
Solution Approach 2:
The cover pane acts as an intermediary between the display and the housing shell structure. The display is bonded to the cover pane with adhesive, and the cover pane is subsequently attached to the housing shell's edge bar, decoupling the display from direct contact with the rear wall and its surface irregularities.
2Manufacturing precision
If the display is mounted at a distance from the rear wall of the housing shell, then the optical quality is improved by avoiding mechanical stresses, but the attachment stability may be reduced
Solution Approach 1:
The mounting structure extends in the longitudinal dimension by having the edge bar protrude forward from the rear wall. This creates a three-dimensional mounting architecture where the display is supported at a distance from the rear wall while the edge bar provides structural anchoring, maintaining stability without direct rear wall contact.
Solution Approach 2:
The edge bar is designed with a U-shaped cross-section that wraps around and engages with the cover pane's peripheral flange. This curved, embracing geometry provides distributed mechanical engagement and stability while maintaining the display's spaced-away position from the rear wall.
3Shape
If a decorative frame is added to surround the display, then the aesthetic appearance is improved, but the device complexity increases
Solution Approach 1:
The decorative frame is merged with the cover pane assembly rather than being a separate component. The frame is attached to the cover pane's front surface, integrating aesthetic functionality with the existing structural element and avoiding additional mounting hardware or complex assembly steps.
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
This design provides stable attachment of the display to the vehicle without direct contact or extensive bonding, ensuring mechanical stability during vehicle vibrations and accommodating curved displays with appropriate adhesive compensation, while enabling touch panel functionality.
Implementation Method 1
The edge bar is connected to the decorative frame (16) on the cover pane by means of an adhesive (28)
Implementation Method 2
the display is no longer in contact with the back and, in particular, is no longer glued to the back over a large area. As is customary per se, the display is fastened or mounted to the cover pane by means of a transparent adhesive layer (optical bonding)
Data Source
Figure 1
Figure 2
AI summary
The display device (12) for a vehicle is provided with a display (18) having a display surface (20) on a front side and having a rear side facing away from the latter and a cover screen (14) arranged in front of the display surface (20). Furthermore, the display device (12) has a decorative frame (16) which is connected to the edge of the cover screen (14) and protrudes on all sides over the edge of the display (18), and a rear-side housing shell (17) which has a rear wall (36) with an edge web (38) rising from the latter. The rear wall (36) of the housing shell (17) is arranged at a distance from the rear side of the display (18), wherein the edge web (38) of the housing shell (17) is connected to the decorative frame (16) by means of an adhesive.