Display Panel Light Shielding Pattern for Rub Alignment Shadow
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In liquid crystal display panels, spacers can create rub alignment shadows due to incomplete rubbing by the rub roller, leading to light leakage and reduced display contrast, as the rub roller struggles to reach both sides of the spacer, resulting in insufficient alignment and affecting the uniformity of the liquid crystal layer.
Innovation Solution
The introduction of light shielding patterns on the base-plates, positioned on either side of the spacer projections along the rub alignment direction, which shields the rub alignment shadow generated by the spacer, thereby preventing it from entering the effective display area and reducing light leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If spacers are disposed between the color film base-plate and the array base-plate to maintain uniform box thickness, then the uniformity of the liquid crystal layer is improved, but rub alignment shadows are generated due to incomplete rubbing by the rub roller, causing light leakage and reduced display contrast
Solution Approach 1:
The patent introduces a light shielding pattern as an intermediary element between the spacer and the display area. This light shielding pattern blocks the harmful light leakage caused by rub alignment shadows, allowing the spacer to maintain box thickness uniformity without compromising display contrast. The light shielding pattern acts as a mediator that isolates the harmful effect of the spacer's shadow from the effective display area.
Solution Approach 2:
The patent converts the harmful rub alignment shadow into a beneficial configuration by strategically positioning light shielding patterns. Instead of trying to eliminate the shadow entirely, the design accepts its presence and uses the light shielding patterns to contain it within non-display areas, thereby transforming a defect into a manageable structural feature that does not affect display quality.
2Ease of operation
If the rub roller is used to align the alignment layer, then the liquid crystal molecules achieve proper orientation, but the rub roller cannot reach both sides of the spacer, resulting in insufficient alignment and rub alignment shadows
Solution Approach 1:
The light shielding pattern serves as an intermediary that compensates for the rub roller's inability to reach certain areas. By positioning the light shielding pattern to cover the shadow regions, the system achieves complete optical coverage even though the mechanical rubbing process is incomplete in those areas.
Solution Approach 2:
The patent segments the base-plate structure into functional zones: areas with spacers for thickness control, areas with light shielding patterns for shadow compensation, and effective display areas. This segmentation allows each zone to perform its specific function without interfering with others, enabling the rub roller to focus on the display areas while the light shielding patterns handle the shadow regions.
3Object-affected harmful factors
If light shielding patterns are added to shield rub alignment shadows, then light leakage is reduced and display contrast is enhanced, but the device structure becomes more complex
Solution Approach 1:
The patent merges the light shielding pattern with the existing base-plate structure, integrating it into the color film base-plate or array base-plate. This integration approach combines multiple functions (structural support, light shielding, and alignment reference) into a single component, reducing overall device complexity compared to adding separate shielding elements.
Solution Approach 2:
The light shielding pattern serves multiple functions: it blocks light leakage from rub alignment shadows, provides structural support, and can serve as an alignment reference during manufacturing. This multi-functionality reduces the need for additional separate components, thereby minimizing the increase in device complexity.
Data Source
AI summary
A display panel and a display are provided. The display panel includes a first base-plate and a second base-plate which are oppositely disposed. The first base-plate includes a black matrix and a first spacer. The black matrix has a first black matrix area corresponding to the first spacer. The first base-plate or the second base-plate includes a first light shielding pattern. The projection of at least a part of the first light shielding pattern on the first base-plate is located on at least one of two sides of the projection of the first black matrix area on the first base-plate along a rub alignment direction.