Flush Screw Fixing Structure for Thin Display Modules
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Solution Overview
Problem
Conventional fixing methods for substrates on supporting plates, such as screw clamps, create projections that increase the thickness of devices like liquid crystal modules, leading to nonuniform luminance distribution and reduced contact with backlights, making them less suitable for thinner devices.
Innovation Solution
A fixing structure and method where a male screw is inserted from the supporting plate side, with its first end projecting through the substrate and the second end not projecting from the opposite surface, allowing for a closer contact between the substrate and the supporting plate without increasing the device's thickness, using a female screw to secure the male screw and ensuring mechanical and electrical coupling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a projection is formed on the supporting plate to firmly fix the substrate, then the fixing strength is improved, but the device thickness increases
Solution Approach 1:
Instead of forming a projection on the supporting plate that extends toward the substrate, the patent inverts the approach by forming a recess in the supporting plate that receives the screw head. This allows the screw to secure the substrate without creating an outward projection that would increase device thickness, thereby resolving the contradiction between fixing strength and compact form factor
Solution Approach 2:
The screw head is nested within the recess formed in the supporting plate, with the recess depth designed to accommodate the screw head while keeping the outer surface of the supporting plate flush. This nesting approach maintains strong mechanical fixation while eliminating thickness increase, addressing both the strength requirement and thickness constraint
2Stability of the object's composition
If a projection is formed on the supporting plate, then the substrate can be firmly fixed, but the backlight cannot be brought into close contact with the supporting plate
Solution Approach 1:
Rather than adding a projection that would physically block the backlight from contacting the supporting plate, the patent uses a recess to house the screw head. This inversion eliminates the physical obstruction, allowing the backlight to maintain uniform close contact with the supporting plate surface while the substrate remains firmly fixed through the screw mechanism
Solution Approach 2:
The recess is localized to specific positions where screws are required for substrate fixation, while the rest of the supporting plate surface remains smooth and flush. This localized modification allows uniform backlight contact across the majority of the surface while providing secure fixation points where needed, resolving the contradiction between fixation stability and contact uniformity
Data Source
AI summary
According to an aspect, a fixing structure includes: a supporting plate; a substrate arranged on a first surface of the supporting plate, the substrate including a component that is arranged on a surface opposite to the supporting plate and projects toward opposite to the supporting plate; a male screw that is fixed to the supporting plate so that a first end projects from the first surface to pass through the substrate, and a second end opposite to the first end does not project from a second surface opposite to the first surface of the supporting plate; and a female screw that is screwed with the first end of the male screw projecting from the substrate.