Signal Line Post Spacer for Display Panel Compression Resistance
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Solution Overview
Problem
Liquid crystal display panels face challenges in achieving optimal compression resistance while maintaining a high aperture ratio, as existing post spacer designs often require separate manufacturing processes and can compromise on pressure resistance.
Innovation Solution
The display panel incorporates a design where the first signal line acts as a post spacer, overlapping with thin-film transistors and signal lines on the substrate, and includes elevation portions to enhance compression resistance without increasing manufacturing complexity or reducing the aperture ratio, by utilizing the signal line's region for support under pressure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a separate post spacer structure is added to improve compression resistance, then compression resistance is improved, but device complexity and manufacturing process complexity increase
Solution Approach 1:
The signal line is merged with the post spacer structure by making the signal line extend into the post spacer region. The signal line and post spacer share the same physical space and are formed in the same manufacturing process, eliminating the need for a separate post spacer structure while maintaining compression resistance.
Solution Approach 2:
The signal line serves dual functions: it conducts electrical signals and simultaneously acts as a post spacer providing compression resistance. This multi-functionality eliminates the need for dedicated post spacer structures, reducing device complexity while maintaining structural support.
2Strength
If a separate post spacer structure is added to improve compression resistance, then compression resistance is improved, but manufacturing process complexity increases
Solution Approach 1:
The signal line and post spacer are merged into a single integrated structure that is formed in the same manufacturing process. The signal line extends into the post spacer region and is patterned together with other signal lines, eliminating the need for separate post spacer fabrication steps.
Solution Approach 2:
The signal line structure performs both electrical signal conduction and mechanical support functions. By making the signal line serve as the post spacer, the manufacturing process is simplified as no additional materials or process steps are required beyond what is already needed for signal line formation.
3Strength
If the signal line is extended to overlap with the thin-film transistor to serve as a post spacer, then compression resistance is improved and manufacturing is simplified, but the aperture ratio may be reduced
Solution Approach 1:
The signal line is extended only in the specific region where it needs to serve as a post spacer, namely where it overlaps with the thin-film transistor. This localized extension provides compression resistance exactly where needed without unnecessarily reducing the overall aperture ratio of the display panel.
Data Source
AI summary
The present disclosure provides a display panel and a display device. The display panel comprises: a first substrate, a plurality of first thin film transistors located on one side of the first substrate, and a first signal line located on one side of each first thin film transistor and insulated from each first thin film transistor; and a second substrate, and a plurality of first spacers located on the side of the second substrate facing the first substrate, the orthographic projection of each first spacer on the first substrate having an overlapping region with the orthographic projection of the first thin film transistor on the first substrate, and having an overlapping region with the orthographic projection of the first signal line on the first substrate.