Display Panel Particles and Roughness for Light Leakage Control
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Solution Overview
Problem
Vertical alignment liquid crystal display panels suffer from light leakage issues, which degrade display quality.
Innovation Solution
Incorporating particles in the non-display region of the display panel without specific alignment directions, which reduces light transmittance and improves liquid crystal alignment, thereby minimizing light leakage and enhancing image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If particles with specific alignment directions are used in the non-display region, then liquid crystal alignment is improved, but light transmittance increases causing light leakage
Solution Approach 1:
The patent applies different particle characteristics to different regions: particles in the display region have specific alignment directions to guide liquid crystal orientation, while particles in the non-display region have no specific alignment direction to reduce light transmittance and prevent light leakage. This local differentiation resolves the contradiction between achieving good liquid crystal alignment and preventing light leakage.
2Object-generated harmful factors
If the surface roughness is increased in the non-display region, then light transmittance is reduced, but display quality may be affected
Solution Approach 1:
The patent specifies different surface roughness requirements for different regions: the light transmitting portion (display region) has a first surface roughness that maintains good display quality, while the light shielding portion (non-display region) has a second surface roughness that is greater than the first, effectively reducing light transmittance and preventing light leakage without affecting display quality.
3Reliability
If particles are added to the display panel, then liquid crystal alignment is enhanced, but device complexity increases
Solution Approach 1:
The patent uses particles that serve multiple functions: they provide alignment guidance for liquid crystal molecules, control light transmittance in the non-display region, and contribute to surface roughness control. This multi-functionality reduces the need for separate components, thereby limiting the increase in device complexity while achieving improved liquid crystal alignment.
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
The approach effectively reduces light leakage and improves display image quality by ensuring faster recovery of liquid crystal molecules under external forces and optimizing surface roughness in different regions.
Implementation Method 1
the particles located corresponding to the non-display region of the display panel do not have any specific alignment direction, such that the liquid crystals in the region do not tilt toward any specific direction, and the light transmittance of the non-display region is lowered
Implementation Method 2
A first surface roughness corresponding to the light transmitting portion is greater than a second surface roughness corresponding to the light shielding portion
Data Source
AI summary
A display panel and a display device are provided. The display panel includes a first substrate having a display region and a non-display region, a second substrate disposed opposite to the first substrate, at least a data line and at least a scan line disposed in the display region, a liquid crystal layer, a plurality of spacers and a seal disposed between the first substrate and the second substrate, a light shielding layer disposed between the first substrate and the second substrate, and including a light transmitting portion and a light shielding portion, and an alignment layer and a plurality of particles disposed on the light transmitting portion and the light shielding portion. A first surface roughness corresponding to the light transmitting portion of the non-display region is greater than a second surface roughness corresponding to the light shielding portion of the non-display region.