LCD Light-Shielding Pattern Opening for Sealing Inspection
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Solution Overview
Problem
Existing liquid crystal display (LCD) manufacturing processes face challenges in inspecting the sealing area for abnormalities, particularly when using black sealing material on light-shielding holding members, as existing inspection devices cannot accurately measure disconnections or abnormal patterns.
Innovation Solution
Incorporating openings in the light-shielding pattern on the LCD substrate, which extend in the thickness direction and have a depth matching the light-shielding pattern's thickness, allows for the inspection of sealing member abnormalities by analyzing reflected light, enabling the detection of correctly applied sealing members and facilitating repair if necessary.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a black sealing material is applied on a black column spacer (BCS) in which the column spacers for maintaining an interval between the light-shielding pattern and the substrate are simultaneously formed of the same material, then the sealing structure is simplified and manufacturing is easier, but it becomes impossible to measure the disconnection or abnormal pattern of the black sealing material using the existing sealing inspection device
Solution Approach 1:
The patent introduces a light-shielding holding member with a light-shielding pattern as an intermediary structure. This holding member is positioned between the sealing member and the substrate, and includes openings that allow inspection light to pass through. The light-shielding pattern in the holding member creates a reference structure that enables the inspection device to detect sealing abnormalities by comparing light transmission through the openings, thus solving the inspection problem while maintaining the simplified sealing structure.
2Device complexity
If the column spacers and light-shielding pattern are formed of the same material to create a black column spacer (BCS), then the manufacturing process is simplified, but the sealing inspection device cannot detect disconnections or abnormal patterns of the sealing material
Solution Approach 1:
The patent segments the light-shielding function into two separate components: the light-shielding pattern formed of the same material as column spacers (maintaining manufacturing simplicity), and a separate light-shielding holding member with openings that provides the inspection function. This segmentation allows the inspection light to pass through the openings and detect sealing abnormalities without requiring changes to the original simplified manufacturing process for the column spacers and light-shielding pattern.
3Device complexity
If existing sealing inspection devices are used to inspect black sealing material on black column spacers, then no additional components are needed, but the inspection cannot accurately measure disconnections or abnormal patterns
Solution Approach 1:
The light-shielding holding member with openings serves as an intermediary inspection aid that works with existing sealing inspection devices. The holding member is positioned in the inspection path and its openings allow inspection light to interact with the sealing member, creating detectable light patterns that reveal sealing abnormalities. This approach maintains compatibility with existing inspection devices while significantly improving inspection reliability.
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
This method enables effective inspection and potential repair of sealing member abnormalities, ensuring proper sealing and preventing defects in the LCD, thereby improving manufacturing efficiency and product quality.
Implementation Method 1
allows for the inspection of sealing member abnormalities by analyzing reflected light
Data Source
AI summary
A liquid crystal display is provided. A liquid crystal display comprising a first substrate which comprises a display area and a non-display area, a second substrate which faces the first substrate, a sealing member which is disposed in the non-display area between the first substrate and the second substrate, wherein the first substrate comprises a light-shielding pattern, a column spacer which is protruded from the light-shielding pattern toward the second substrate to maintain an interval between the first substrate and the second substrate, an opening which is disposed in the light-shielding pattern, and overlapping the sealing member.