Display Module Frame Fixation for Vibration-Resistant Control Boards
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Solution Overview
Problem
Display modules in electric devices face challenges in withstanding vigorous vibration and high temperatures while being miniaturized, leading to deformation and damage of control boards due to conventional bolt fixation methods, which also compromise sealing and component arrangement.
Innovation Solution
A display module design using a supporting intermediate frame with fixing portions, such as hot-meltable plastic pillars, to secure the control board, reducing stress concentration and enabling miniaturization without deformation, while providing effective sealing against moisture ingress.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional bolt fixation methods are used to secure the control board, then the control board can be fixed, but the control board deforms and damages under vigorous vibration and high temperature conditions
Solution Approach 1:
The patent replaces the conventional mechanical bolt fixation system with a hot-melt adhesive fixation system. The hot-melt adhesive is injected into cavities in the supporting intermediate frame to bond with the control board, eliminating the need for bolts and nuts. This substitution resolves the contradiction by providing a fixation method that is more resistant to vibration and temperature changes, preventing the control board from deforming and damaging while maintaining secure attachment.
2Volume of moving object
If the display module is miniaturized to improve aesthetics and portability, then the size is reduced, but the layout of numerous connectors on the circuit board becomes more difficult
Solution Approach 1:
The patent utilizes the vertical dimension (thickness direction) by designing a three-layer structure consisting of the control board, supporting intermediate frame, and transparent cover plate stacked together. The connectors are arranged on the control board while the supporting intermediate frame provides structural support and housing for additional components in the vertical dimension. This dimensional transition allows for compact packaging of multiple connectors and components without increasing the planar footprint, thus resolving the contradiction between miniaturization and connector layout complexity.
3Reliability
If the control board is secured with bolts, then fixation is achieved, but sealing against moisture ingress is compromised
Solution Approach 1:
The patent replaces the mechanical bolt fixation system with a hot-melt adhesive system that inherently provides sealing functionality. The hot-melt adhesive fills and bonds the control board to the supporting intermediate frame, creating a sealed structure that prevents moisture ingress. This eliminates the sealing issues associated with bolted connections, as the adhesive creates a continuous barrier that is more effective at preventing moisture penetration while maintaining secure fixation.
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 design ensures robust fixation and sealing, preventing damage to control boards under high temperature and vibration conditions, allowing for compact designs with improved component arrangement and reduced space requirements.
Implementation Method 1
a material for the fixing portion comprises a hot melt material
Data Source
AI summary
A display module includes: a supporting intermediate frame and a transparent cover plate, wherein the supporting intermediate frame comprises a main plate portion extending in a direction the same as the transparent cover plate and a supporting lateral edge disposed to surround the main plate portion, and the supporting intermediate frame and the transparent cover plate form a first accommodation space; a display unit disposed in the first accommodation space; and a control board disposed at a side of the main plate portion away from the display unit, wherein the control board is electrically connected to the display unit to transmit a display signal to the display unit; wherein the supporting intermediate frame further has at least one fixing portion disposed at a side of the main plate portion away from the display unit for fixing the control board.