LCD Light-Shielding Member Indentation Pattern for LC Alignment
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Solution Overview
Problem
In liquid crystal display (LCD) devices, the control forces exerted by light-shielding members and protrusion patterns on liquid crystal molecules can be opposing, leading to misalignment due to insufficient control, especially under external pressure, as they do not effectively cooperate to align the molecules correctly.
Innovation Solution
The LCD device incorporates a light-shielding member with indentation pattern parts on its surface, which overlap parts of the pixel electrode, and a protrusion pattern on the pixel electrode, creating a coordinated control force that minimizes conflict between the light-shielding member's and protrusion pattern's control forces, ensuring proper alignment of liquid crystal molecules even under external pressure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a light-shielding member is provided to prevent light leakage, then light shielding performance is improved, but control over liquid crystal molecules deteriorates due to conflicting control forces
Solution Approach 1:
The light-shielding member is segmented into multiple regions: a first region that contacts the liquid crystal layer to provide light shielding, and a second region that does not contact the liquid crystal layer to avoid exerting control force. This segmentation allows the light-shielding member to fulfill its light blocking function while eliminating the harmful effect of conflicting control forces on liquid crystal molecule alignment.
Solution Approach 2:
Different regions of the light-shielding member are designed with different functional properties. The first region has light-shielding properties and contacts the liquid crystal layer, while the second region is designed to not contact the liquid crystal layer, creating local quality differences that resolve the contradiction between light shielding and molecular control.
2Object-affected harmful factors
If the light-shielding member contacts the liquid crystal layer, then light shielding is effective, but conflicting control forces cause misalignment under external pressure
Solution Approach 1:
The light-shielding member is divided into a first region that contacts the liquid crystal layer for effective light shielding and a second region that does not contact to avoid creating conflicting control forces. This segmentation resolves the contradiction by separating the light shielding function from the harmful control force generation.
Solution Approach 2:
The contact parameter between the light-shielding member and liquid crystal layer is changed from continuous contact to partial contact. By modifying the contact state in the second region, the design eliminates conflicting control forces while maintaining effective light shielding in the first region, improving reliability under external pressure.
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 configuration enhances the control over liquid crystal molecules, preventing misalignment and ensuring accurate alignment, thereby improving the display's performance and reliability by providing a sufficient and balanced control force.
Implementation Method 1
a light-shielding member for preventing light leakage may be provided
Implementation Method 2
The protrusion pattern forms a height difference, and the height difference controls the liquid crystal molecules in a particular direction
Data Source
AI summary
A liquid crystal display includes a first display substrate, a second display substrate facing the first display substrate, and a liquid crystal layer interposed between the first and second display substrates, where the first display substrate includes a lower substrate, a pixel electrode, which is disposed on the lower substrate, and a protrusion pattern, which is disposed on the pixel electrode along an outer edge of the pixel electrode, the second display substrate includes an upper substrate and a light-shielding member, which is disposed on a surface of the upper substrate facing the first display substrate and in which indentation pattern parts are inwardly indented in a plan view, the light-shielding member includes light-shielding parts that are an entirety of the light-shielding member except for the indentation pattern parts, and the indentation pattern parts overlap parts of the pixel electrode.