Non-quadrangular Display Panel Alignment Marks
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Solution Overview
Problem
In liquid crystal display panels with non-quadrangular shapes, alignment accuracy between components like the glass substrate and polarizing plates is compromised due to the lack of distinct features for alignment, leading to potential positional deviations and deteriorated display quality.
Innovation Solution
Incorporating alignment marks on the glass substrate and polarizing plates with specific area ratios, ensuring the second alignment mark covers 20% to 100% of the first alignment mark's area, allowing for accurate alignment and improved design visibility when viewed from the front.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If alignment marks are not provided on non-quadrangular members, then the device complexity is reduced, but the manufacturing precision deteriorates due to inability to align components accurately
Solution Approach 1:
Alignment marks are formed on the glass substrate and plate member before the actual assembly process. These marks serve as pre-established reference features that guide the subsequent alignment operation, ensuring accurate positioning without requiring complex alignment mechanisms during assembly.
Solution Approach 2:
The alignment marks act as intermediary reference features between the glass substrate and plate member. By providing visible markers on both components, the invention creates an intermediate reference system that mediates the alignment process, allowing operators to accurately superimpose components without direct mechanical guidance.
2Area of stationary object
If the area of the second alignment mark is too small, then the design visibility is improved, but the manufacturing precision deteriorates due to insufficient alignment accuracy
Solution Approach 1:
The invention specifies that the area of the second alignment mark should be 20% or more of the area of the first alignment mark. This quantitative parameter constraint ensures that the alignment mark is sufficiently large to provide accurate alignment while maintaining acceptable design visibility, optimizing the balance between these two competing requirements.
3Ease of manufacture
If alignment marks are made visible from the front, then the design visibility is improved, but the measurement precision may be affected by visual interference
Solution Approach 1:
The alignment marks are positioned in specific local regions of the glass substrate and plate member, allowing them to serve dual purposes: they are visible from the front for design purposes while being located in areas that do not interfere with the optical measurement paths. This spatial differentiation allows both functions to coexist without significant interference.
Data Source
AI summary
An image display panel includes a glass substrate including a first surface and a second surface opposite from the first surface, a plate member disposed on the second surface, a first alignment mark on the glass substrate, and a second alignment mark on the plate member so as to be positioned with respect to the first alignment mark. One of the glass substrate and the plate member has a non-quadrangular outer shape. The second alignment mark has an area that is 20% or more and 100% or less with respect to an area of the first alignment mark, and the first alignment mark and the second alignment mark are visible from a front.