Display Device Sub-Spacer Segmentation for Orthogonal Displacement Control
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Solution Overview
Problem
Liquid crystal display devices lack a structure to suppress displacement in directions orthogonal to the main spacer alignment, leading to potential damage of alignment films and light leakage, which results in decreased pixel display area, transmittance, and color balance issues.
Innovation Solution
The implementation of a display device with a specific configuration of sub-spacers and a main spacer, where protrusion portions on the substrates interact to prevent excessive displacement, maintaining the alignment of liquid crystal molecules and minimizing light leakage by ensuring consistent pixel opening areas across the display region.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a light-shielding layer is disposed over a wide range to suppress light leakage, then light leakage is suppressed, but the area (opening area) contributing to display of each pixel decreases, transmittance decreases, and color balance deteriorates
Solution Approach 1:
The sub-spacer is segmented into multiple protrusion portions (first, second, third, and fourth protrusion portions) positioned at different locations. This segmentation allows displacement suppression at specific critical points without requiring a continuous light-shielding layer across the entire pixel area, thereby maintaining opening area while preventing light leakage.
Solution Approach 2:
The protrusion portions of the sub-spacer act as intermediary mechanical structures between the first and second substrates. These protrusions prevent excessive displacement that would cause alignment film damage and subsequent light leakage, eliminating the need for extensive light-shielding layers.
2Stability of the object's composition
If the first spacer and the second spacer contact alignment films during displacement, then displacement is suppressed in the first direction, but the alignment films may be damaged and liquid crystal molecule alignment is lost
Solution Approach 1:
The sub-spacer is divided into multiple protrusion portions positioned at different locations and orientations. This segmentation allows the structure to suppress displacement in multiple directions (first direction via first and second protrusions, second direction via third and fourth protrusions) without requiring the spacers to contact and damage the alignment films.
Solution Approach 2:
The invention transitions from one-dimensional displacement suppression (first direction only) to two-dimensional suppression by adding protrusion portions oriented in the second direction. This dimensional expansion allows comprehensive displacement control in both orthogonal directions without compromising alignment film integrity.
3Stability of the object's composition
If sub-spacers are designed to suppress displacement in the first direction, then excessive displacement is suppressed, but there is no structure to suppress displacement in the second direction orthogonal to the first direction
Solution Approach 1:
The sub-spacer is designed with multiple protrusion portions that perform multiple functions: first and second protrusion portions suppress displacement in the first direction, while third and fourth protrusion portions suppress displacement in the second direction. This multi-functional design enables comprehensive two-dimensional displacement control within a single sub-spacer structure.
Solution Approach 2:
The invention extends displacement suppression from one dimension (first direction) to two dimensions by incorporating protrusion portions oriented in the second direction. The third and fourth protrusion portions specifically address displacement in the orthogonal second direction, creating versatile multi-directional control.
Data Source
AI summary
According to one embodiment, a display device includes first to third scanning lines, first and a second protrusion portions disposed on the second scanning line and arranged in a first direction, third and seventh protrusion portions disposed on a side close to the third scanning line on the second scanning line, fourth and sixth protrusion portions disposed on a side close to the first scanning line on the second scanning line, and a fifth protrusion portion disposed between the first protrusion portion and the second protrusion portion. The third and sixth protrusion portions are arranged in the second direction, and the fourth and seventh protrusion portions are arranged in the second direction.