Backlight Frame Barrier Zones Prevent Debris Entry
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Solution Overview
Problem
During the manufacturing and use of liquid crystal display devices, debris from screw holes and friction-generated particles easily enter the backlight, causing optical defects and affecting display quality.
Innovation Solution
A backlight frame design featuring a rigid plastic frame with retaining walls and soft adhesive strips, which are parallel or obliquely disposed, forming barrier zones to prevent foreign matter entry, and a metal backplane with screw holes to securely fix the frame, reducing debris and friction-induced issues.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a rigid plastic frame with retaining walls is used to secure the liquid crystal panel, then the panel stability is improved, but debris from screw holes and friction-generated particles can still enter the backlight causing optical defects
Solution Approach 1:
The frame structure is segmented into multiple functional zones: retaining walls for panel support, barrier zones with soft adhesive strips for particle interception, and screw holes for assembly. This segmentation allows each zone to perform its specific function - the barrier zones specifically target particle prevention while retaining walls provide structural support.
Solution Approach 2:
Soft adhesive strips are introduced as intermediary elements between the rigid frame and the panel. These strips serve as a mediator that both secures the panel and intercepts particles, converting the rigid structure into a system that can passively filter debris while maintaining stability.
2Object-affected harmful factors
If soft adhesive strips are added to form barrier zones, then particle interception is improved, but the device structure becomes more complex
Solution Approach 1:
The soft adhesive strips are merged with the rigid frame structure to form an integrated barrier zone. Rather than being separate components, the adhesive strips are positioned within the frame's retaining walls, combining the structural support function with the particle interception function in a unified design.
Solution Approach 2:
The frame structure is designed with multi-functionality: the retaining walls simultaneously provide structural support for the panel and create barrier zones for particle interception. The soft adhesive strips serve dual purposes of securing the panel and filtering debris, reducing the need for additional separate components.
3Ease of manufacture
If screw holes are provided in the backplane for assembly, then ease of manufacture is improved, but friction-generated particles and debris can enter the backlight
Solution Approach 1:
The barrier zones with soft adhesive strips are positioned to preemptively intercept particles before they can reach the backlight. This preliminary protective action occurs at the frame level, preventing debris generated during assembly from causing optical defects later.
Data Source
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AI summary
The present disclosurerelates to a backlight frame including a backplane anda plastic frame. Theplastic frame includes a planar portion configured to carry a panel ;a retaining wall substantially perpendicular to the planar portion, the retaining wall including a side facing the panel and a side away from the panel;a plurality of soft adhesive strips substantially parallel to each other on the planar portion, the soft adhesive strips being on the side facing the panel and in contact with the panel; and a plastic frame assembly portion on the side away from the panel, the plastic frame assembly portion being configured to fix the plastic frame to the backplane.