Display Assembly Tape Bonding for Vibration Resistance
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Solution Overview
Problem
Standard commercial LCDs are not suitable for applications requiring vibration and shock resistance, as the adhesive bond between modified plates can cause optical distortion and allow stray light to seep around the edges, leading to issues like windowframing and light scattering.
Innovation Solution
A display assembly with transparent plates bonded using adhesive tape along their inner surfaces, preventing direct adhesive contact with the plates and reducing stress-induced distortion, while also using opaque tape to minimize stray light escape.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If transparent plates are bonded directly to the display unit with adhesive, then the display achieves ruggedness and vibration resistance, but optical distortion and windowframing effects occur due to stress in the adhesive bond
Solution Approach 1:
A frame acts as an intermediary structure between the transparent plates and the display unit. The frame provides mechanical support and bonding surfaces, allowing the adhesive to bond to the frame rather than directly to the display unit or plates, thereby reducing stress-induced optical distortion while maintaining vibration resistance
Solution Approach 2:
The bonding structure is segmented into distinct components: the display unit, the frame, and the transparent plates. This segmentation allows each component to perform its specific function independently - the frame handles mechanical bonding and stress distribution, while the plates provide protection without directly transmitting adhesive stress to the display
2Strength
If adhesive is used to bond transparent plates to the display unit, then structural strength and ruggedness are improved, but light scattering and stray light seepage occur around the edges
Solution Approach 1:
The frame serves as an intermediary that contains and directs the adhesive, preventing it from reaching the edges where it could cause light scattering. The frame's structure allows the adhesive to be confined to specific bonding zones away from the display perimeter
Solution Approach 2:
The adhesive is extracted from the edge regions and confined to internal bonding zones within the frame structure. This removes the harmful effect of adhesive at the edges (light scattering) while preserving the necessary bonding function in the frame
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 effectively reduces optical distortion and stray light issues, enhancing the display's ruggedness and clarity by allowing the adhesive to bond with the tape instead of the plates, thereby minimizing stress and light leakage.
Implementation Method 1
two transparent plates bonded respectively to the front and rear surfaces of the display unit by an adhesive, a tape secured along at least one side of at least one of the plates on its inner surface such that the adhesive in the region of the tape bonds with the tape and not directly with the surface of the plates
Data Source
AI summary
A display assembly and a method of making a display assembly are disclosed. A display assembly is disclosed including a display unit 1 and two transparent plates 2, 3 bonded respectively to the front and rear surfaces of the display unit 1 by an adhesive. A tape is secured along at least one side of at least one of the plates 2, 3 on its inner surface such that the adhesive inner region of the tape bonds with the tape and not directly with the surface of the plates 2, 3.