LCD Panel Spacer Layout to Prevent Light Leakage
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Solution Overview
Problem
In liquid crystal display (LCD) panels, spacers restrict the aperture ratio and can cause defects like light leakage when the panel displaces due to external forces, as they scratch the alignment film, necessitating wider black matrices that further reduce the aperture ratio.
Innovation Solution
The use of main and auxiliary spacers on one substrate and corresponding lug bosses on the opposing substrate, where auxiliary spacers are offset to support the main spacers and prevent them from scratching the alignment film, allowing the panel to maintain uniformity without increasing black matrix width.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If spacers are used to maintain cell gap uniformity, then the stability and uniformity of the cell gap is improved, but the aperture ratio is reduced and light leakage defects occur when the panel displaces
Solution Approach 1:
The invention divides the spacer system into two distinct types: main spacers that directly maintain cell gap, and auxiliary spacers that provide support during displacement. This segmentation allows each type to perform its specialized function without the drawbacks of the traditional single-spacer design, maintaining aperture ratio while preventing light leakage.
Solution Approach 2:
The auxiliary spacers act as intermediary elements between the main spacers and the substrate. When displacement occurs, the auxiliary spacers engage with the alignment film first, serving as a mediator that prevents the main spacers from directly scratching the alignment film, thus avoiding light leakage while maintaining cell gap stability.
2Object-affected harmful factors
If black matrix width is increased to cover spacer defects, then light leakage is prevented, but the aperture ratio is further reduced
Solution Approach 1:
The invention converts the potential harmful effect of spacer displacement into a beneficial outcome by designing auxiliary spacers that intentionally engage with the alignment film during displacement. This controlled engagement prevents uncontrolled scratching by main spacers, eliminating light leakage without requiring wider black matrices, thus preserving aperture ratio.
3Reliability
If auxiliary spacers are positioned to support main spacers during displacement, then the reliability of cell gap maintenance is improved, but the device complexity increases
Solution Approach 1:
The invention applies local quality by positioning auxiliary spacers at specific locations where they can effectively support the main spacers during displacement, rather than uniformly distributing all spacer types. The auxiliary spacers are strategically placed to engage with the alignment film only when needed, providing localized support that enhances reliability without unnecessarily increasing overall device complexity.
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 prevents light leakage and maintains the aperture ratio of the LCD panel by ensuring the spacers do not scratch the alignment film during displacement, thus enhancing display performance without reducing transmittance.
Implementation Method 1
post spacers (PS) having an elastic restoring force are usually disposed between the array substrate and the opposed substrate. The PS is in a compressed state and has the function of supporting the liquid crystal cell
Data Source
AI summary
A display panel and a display device are provided. In the display panel, a plurality of main spacers and a plurality of auxiliary spacers are disposed on a side of a first substrate close to a second substrate, the second substrate further includes a plurality of first lug bosses and a plurality of second lug bosses; an orthographic projection of the main spacers on the second substrate is at least partially overlapped with an orthographic projection of a corresponding first lug boss on the second substrate; an orthographic projection of the auxiliary spacers on the second substrate is away from an orthographic projection of a corresponding second lug boss on the second substrate by a preset distance; and the distance between each of the auxiliary spacers and the corresponding second lug boss is less than a height of the first lug bosses.