LCD Bottom Plate Alignment Hole with Rigid Protrusion
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Solution Overview
Problem
Liquid crystal display devices face misalignment issues between the bottom plate and the liquid crystal display panel, leading to light leakage and degraded image quality, particularly when using metallic bottom plates that reflect light and cause irregularities in alignment holes formed by plastic molds.
Innovation Solution
A liquid crystal display device design featuring a bottom plate with a protruding portion and alignment hole, where the protruding portion is made of a rigid material and has a uniform shape to accurately align with the liquid crystal display panel's alignment mark, and a shielding member with a light-absorbing material to suppress light leakage, ensuring precise alignment and bonding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the bottom plate is made of metallic material to provide structural strength, then the strength is improved, but light leakage occurs due to light reflection
Solution Approach 1:
The patent introduces a light-absorbing material layer as an intermediary between the metallic bottom plate and the alignment hole formation process. This layer absorbs light that would otherwise reflect off the metallic surface, preventing light leakage while maintaining the structural strength of the metal bottom plate.
Solution Approach 2:
The patent creates a composite structure by combining metallic material (for strength) with light-absorbing material (for light control). This composite approach allows simultaneous achievement of structural strength and light leakage prevention that neither material could provide alone.
2Ease of operation
If alignment holes are formed by plastic mold to enable alignment, then the alignment function is provided, but irregularities and burrs are generated causing misalignment
Solution Approach 1:
The patent changes the material parameter from plastic mold to metal material with controlled surface treatment. This parameter change eliminates the irregularities and burrs inherent in plastic molding, achieving both alignment functionality and manufacturing precision.
Solution Approach 2:
The patent creates a precise metal copy or replica of the alignment features that eliminates the defects of the original plastic mold process. The metal material is formed with high precision to replicate the alignment hole geometry without introducing burrs or irregularities.
3Area of stationary object
If the bottom plate area is reduced to implement narrow bezel, then the bezel width is reduced, but misalignment between bottom plate and liquid crystal display panel occurs
Solution Approach 1:
The patent introduces a light-absorbing material layer as an intermediary that also serves as a reference surface for alignment. This intermediary layer provides stable alignment features even when the bottom plate area is reduced, enabling narrow bezel design without sacrificing alignment accuracy.
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 effectively prevents misalignment and light leakage, enhancing image quality by ensuring accurate alignment and uniform alignment holes, thereby facilitating the implementation of a narrow bezel design.
Implementation Method 1
a shielding member with a light-absorbing material to suppress light leakage
Data Source
AI summary
Provided herewith is a display device comprising: a first display unit having an alignment mark; and a bottom plate disposed under the first display unit and comprising an alignment hole corresponding to the alignment mark, wherein the bottom plate comprises: a base portion having a first area and a second area surrounding the first area, the alignment hole being located in the second area; a side wall portion along a periphery of the base portion; and a protruding portion protruding from the base portion to surround the alignment hole. Accordingly, in the liquid crystal display device having a narrow bezel, the protruding portion made of a rigid material surrounds the alignment hole formed in the bottom plate, such that alignment holes can be formed uniformly. As a result, it is possible to suppress misalignment from possibly occurring during the process of bonding the liquid crystal display panel with the bottom plate.