Reduced Shield LCD with Connecting Member for Button Stability
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional liquid crystal displays with push buttons are large and heavy due to the need for a shield size equal to the display panel, making them costly and inefficient in terms of material usage.
Innovation Solution
A shield with a smaller size than the display panel, featuring connecting members that attach the button circuit board to the side wall of the display panel, allowing the button member to be positioned below the flange, reducing the overall size and material requirements while maintaining electromagnetic screening.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the shield size is made equal to the display panel size to provide adequate electromagnetic screening, then the screening effect is improved, but the overall device size and weight increase
Solution Approach 1:
The shield is divided into a base portion that contacts the display panel and a flange portion that extends outward. This segmentation allows the shield to provide effective electromagnetic screening at the critical interface between the display panel and circuit board while reducing the overall shield size and weight by eliminating the need for a full-size shield covering the entire display panel area.
2Weight of stationary object
If the button member is attached at the flange of the shield, then the shield can be smaller than the display panel, but the button member position becomes less stable
Solution Approach 1:
The flange portion is pre-formed to extend outward from the base portion of the shield, creating a stable mounting surface before assembly. The button member is then attached to this pre-formed flange structure, which provides inherent positional stability. This preliminary formation of the flange ensures that the button member maintains stable positioning even when the shield is smaller than the display panel.
3Loss of substance
If the shield size is reduced to be smaller than the display panel, then material cost and weight are reduced, but the electromagnetic screening effectiveness may be compromised
Solution Approach 1:
The shield design concentrates electromagnetic screening functionality at the critical local area where the display panel interfaces with the circuit board. The base portion of the shield directly contacts the display panel to provide localized screening where electromagnetic interference is most problematic, while the flange portion provides structural support and mounting functionality. This local quality approach ensures effective screening with reduced material usage compared to a full-size shield.
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 enables a more compact and cost-effective liquid crystal display design by reducing the shield size and stabilizing the button member's position, while maintaining the necessary screening effect and user-adjustable features.
Implementation Method 1
The shield 140 provides screening to reduce electro-magnetic interference occurring in the main circuit board
Data Source
AI summary
An exemplary liquid crystal display (2) includes a display panel (220), a shield (240), a connecting member (250), and a button circuit board (262). The display has a side wall (227). The shield is engaged with the display panel, and a size of the shield is smaller than a corresponding size of the display panel. One end of the connecting member is attached at the shield. The button circuit board is attached at an opposite end of the connecting member and abuts the side wall of the display panel.