Press Sheet Positioning for Display Frame Deformation
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Solution Overview
Problem
The existing display device fixing structure using a flat plate-shaped press sheet results in local deformation of the frame, leading to uneven gaps, light leakage, and movement of the display module, affecting picture quality due to the lack of a circumferential positioning structure.
Innovation Solution
The display device incorporates a frame with multiple press sheets around the display module, each equipped with a circumferential positioning part, such as positioning holes or protrusions, to securely fix the display module in place, preventing movement and rotation, and eliminating the lever effect.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a flat plate-shaped press sheet is used to fix the display module, then the structure is simple and easy to manufacture, but the press sheet and screw form a lever effect resulting in local deformation of the frame and uneven gaps
Solution Approach 1:
The press sheet is transformed from a two-dimensional flat plate to a three-dimensional structure by adding a circumferential positioning part that protrudes toward the display module. This dimensional change allows the press sheet to provide both pressing force and circumferential positioning, eliminating the lever effect while maintaining manufacturing simplicity.
Solution Approach 2:
The press sheet structure is segmented into two functional parts: a pressing part that contacts the back surface of the display module and a circumferential positioning part that limits position in the direction parallel to the display surface. This segmentation allows each part to perform its specific function optimally, preventing deformation while maintaining ease of manufacture.
2Ease of manufacture
If a flat plate-shaped press sheet without circumferential positioning structure is used, then the manufacturing cost is low, but the display module can rotate and move in X-axis and Y-axis directions affecting picture quality
Solution Approach 1:
By adding the circumferential positioning part that protrudes from the press sheet toward the display module, the structure transitions from providing only vertical pressing force to providing both vertical pressing and horizontal positioning. This dimensional enhancement prevents rotation and movement of the display module while keeping the overall structure simple and cost-effective.
Solution Approach 2:
The circumferential positioning part acts as an intermediary element between the press sheet and the display module, providing the necessary positioning function without requiring a completely different fixing mechanism. This intermediary structure maintains cost-effectiveness while achieving the required position stability.
3Device complexity
If a flat plate-shaped press sheet is used, then the structure is simple, but local deformation of the frame occurs along Z axis causing light leakage
Solution Approach 1:
The fixing structure is segmented so that the circumferential positioning part handles the positioning function while the pressing part handles the clamping function. This segmentation distributes the mechanical loads more evenly, preventing concentration of stress that causes local frame deformation and subsequent light leakage, while keeping the overall structure simple.
Solution Approach 2:
The addition of the circumferential positioning part creates a three-dimensional fixing structure that distributes pressing forces more uniformly around the display module perimeter. This dimensional enhancement prevents localized stress concentration that would otherwise cause frame deformation and light leakage, maintaining structural simplicity.
Data Source
AI summary
A display device includes a frame, a display module is provided in the frame, a plurality of press sheets for fixing the display module are provided around the display module. Each press sheet is provided with a positioning part which limits a position of the press sheet in a direction parallel to a display surface of the display module.