Dashboard Display Assembly With Releasable PCB Support
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Solution Overview
Problem
Existing display assembly solutions for motor vehicle dashboards lack precision and stability, which can lead to stress on sensitive components like the TFT cell, and do not allow for easy inspection or replacement of the printed circuit board after installation.
Innovation Solution
A display assembly that includes a pre-assembled module with a display and covering glass, a carrier that is glued to the display's rear surface to support the main printed circuit board, and a rear covering element that is fixed to the carrier and frame in a releasable manner, allowing for stress absorption and easy disassembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the rear covering element is fixed directly to the display with glue or double-sided adhesive tape, then the assembly is simplified, but the tolerance chain becomes too large and the display support precision deteriorates
Solution Approach 1:
The patent introduces a rear covering element as an intermediary component between the display and the mounting structure. This rear covering element provides a precise mounting surface with defined tolerance characteristics, acting as a mediator that ensures accurate display positioning without requiring direct fixation to the display glass, thus resolving the contradiction between assembly simplification and precision maintenance.
2Device complexity
If the rear covering element is fixed permanently to the display, then the assembly structure is simplified, but the printed circuit board cannot be inspected or replaced after installation
Solution Approach 1:
The patent segments the assembly into distinct modular components: the display unit, the rear covering element, and the mounting bracket. The rear covering element is designed to be removable from the display, creating separable modules that allow the printed circuit board to be accessed for inspection or replacement while maintaining a relatively simple overall assembly structure.
3Stability of the object's composition
If the display is rigidly fixed to the dashboard, then the assembly stability is improved, but the TFT cell becomes susceptible to stresses from dashboard movements
Solution Approach 1:
The patent incorporates stress-absorbing elements and flexible connection mechanisms in the mounting bracket that cushion against dashboard movements before these movements can transmit harmful stresses to the TFT cell. This beforehand cushioning protects the sensitive display components while maintaining assembly stability.
4Device complexity
If the tolerance chain is reduced to one tenth of millimeter, then the rear covering element can be fixed directly to the display, but the manufacturing precision requirements become excessively high
Solution Approach 1:
The rear covering element serves as an intermediary that absorbs and manages tolerance accumulations. By providing a precisely manufactured intermediate surface, it allows for simpler fixing methods without requiring the entire tolerance chain to be reduced to extremely tight specifications, thus balancing manufacturing feasibility with assembly simplicity.
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 provides a more precise and stable support for the display, reduces stress on sensitive components, allows for easy inspection and replacement of the printed circuit board, and enhances the overall rigidity and anti-intrusion properties of the assembly.
Implementation Method 1
The carrier 12 is fixedly connected to a rear surface 8 of the display module 2, in particular by means of an adhesive element 18
Data Source
AI summary
A display assembly, in particular for a motor vehicle dashboard, is provided with a display having a rear surface, on which a carrier is arranged; the assembly is further provided with a rear covering element and with a main printed circuit board, which is coupled to the carrier by a centering system and is arranged between the carrier and the rear covering element; the latter is fixed to the carrier so as to hold the main printed circuit board in position; the carrier is fixed to the rear surface of the display by means of adhesive.