LCD Electrode Layout for Bending-Induced Light Leakage
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Liquid crystal displays face light leakage due to misalignment between substrates during the bending process, which existing technologies fail to effectively prevent.
Innovation Solution
The display device incorporates a drain electrode with an extension that covers the storage electrode line and includes a light blocking layer with specific positioning to prevent light leakage, ensuring the extension of the drain electrode is adjacent to the light blocking layer and spacer, thereby blocking light even with substrate misalignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the display device undergoes bending process, then flexibility and adaptability are improved, but misalignment between substrates occurs causing light leakage
Solution Approach 1:
The drain electrode extension is designed in advance to cover the storage electrode line before any misalignment occurs during bending. This preliminary structural arrangement ensures that even when substrates shift during the bending process, the extended drain electrode already occupies the position needed to block light leakage paths.
Solution Approach 2:
The drain electrode is extended in the first direction (lengthwise along the gate line) beyond the conventional transverse-only configuration. This dimensional extension creates an overlapping region that spans both the transverse and longitudinal dimensions, forming a two-dimensional barrier that effectively blocks light leakage regardless of misalignment in either direction.
2Reliability
If the drain electrode is extended to cover the storage electrode line, then light leakage is prevented, but device complexity increases
Solution Approach 1:
The extension of the drain electrode serves dual functions: it maintains the electrical connection for the transistor operation and simultaneously acts as a light blocking layer to prevent light leakage. By merging these two functions into a single structural element, the design avoids adding separate components, thus preventing increased device complexity while achieving reliable light leakage prevention.
Solution Approach 2:
The extended drain electrode region functions as both an electrical conductor for signal transmission and a light blocking barrier for display quality. This multi-functional design allows the same structural element to perform multiple roles, eliminating the need for additional dedicated light blocking components and maintaining device simplicity.
Data Source
AI summary
A display device according to an exemplary embodiment of the present inventive concept includes: a first substrate; a gate line extending parallel to a first direction; a storage electrode line disposed on the same layer as the gate line; a data line insulated from the gate line and the storage electrode line and extending parallel to a second direction perpendicular to the first direction; a drain electrode disposed on the same layer as the data line and including an expansion; a first electrode electrically connected to the drain electrode; a spacer disposed on the first electrode; a second substrate overlapping the first substrate; and a light blocking layer disposed on the second substrate and having an opening exposing the first electrode, a separation distance of the expansion of the drain electrode and the data line along the first direction is 1 μm to 10 μm.