Liquid Crystal Display Panel Light Scattering Polarizer Rainbow Pattern
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Liquid crystal display panels using side-type backlight units face challenges in achieving high contrast and precision due to the difficulty in controlling light transmittance and the occurrence of rainbow patterns caused by differing blocking conditions of sub-pixels under various viewing angles.
Innovation Solution
Incorporating a liquid crystal light control structure with a light scattering structure in the polarizers, such as a pressure-sensitive adhesive layer doped with transparent particles, to uniformly diffuse polarized light and eliminate rainbow patterns without adding new film layers, thereby improving display quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of stationary object
If a side-type backlight unit is used in a liquid crystal display panel, then the display device can achieve a thin and lightweight design, but the light transmittance control precision deteriorates and rainbow patterns occur due to differing blocking conditions of sub-pixels under various viewing angles
Solution Approach 1:
The patent introduces a light scattering structure specifically in the polarizer layer to address the local issue of uneven light distribution and rainbow patterns. This structure selectively scatters light in the regions where sub-pixels are blocked by the black matrix, equalizing the light transmittance across different viewing angles without affecting the overall thin design of the side-type backlight unit.
Solution Approach 2:
The light scattering structure acts as an intermediary element between the polarizer and the liquid crystal layer. It mediates the light path by scattering polarized light before it reaches the liquid crystal layer, thereby compensating for the uneven blocking conditions of sub-pixels and eliminating rainbow patterns while maintaining the thin profile of the display device.
2Device complexity
If conventional polarizers are used without light scattering structures, then the display device maintains a simple structure, but rainbow patterns appear due to uneven light blocking of sub-pixels under different viewing angles
Solution Approach 1:
The patent modifies the optical parameters of the polarizer by incorporating a light scattering structure. This changes the light scattering parameter of the polarizer layer, enabling it to uniformly diffuse polarized light and eliminate rainbow patterns. The modification is achieved by adding transparent particles to the pressure-sensitive adhesive layer, which alters the light scattering characteristics without significantly increasing structural complexity.
Solution Approach 2:
The polarizer is transformed into a composite structure by incorporating transparent particles (such as TiO2, SiO2, or ZrO2) into the pressure-sensitive adhesive layer. This composite material approach enables the polarizer to perform both its original function of polarizing light and the additional function of scattering light uniformly, thereby eliminating rainbow patterns while maintaining structural simplicity.
3Reliability
If additional film layers are added to eliminate rainbow patterns, then display quality improves, but the device becomes heavier and thicker
Solution Approach 1:
The patent merges the light scattering function with the existing polarizer layer by incorporating transparent particles into the pressure-sensitive adhesive layer. This integration eliminates the need for separate light scattering film layers, thereby improving display quality by eliminating rainbow patterns while avoiding increases in device thickness and weight.
Solution Approach 2:
The modified polarizer layer performs multiple functions: it polarizes light and simultaneously scatters light uniformly to eliminate rainbow patterns. This multi-functionality approach allows the display panel to achieve improved display quality without adding extra film layers, thus maintaining a thin and lightweight design.
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 light scattering structure effectively reduces the visibility of rainbow patterns and enhances display quality by uniformly mixing polarized light of different colors, while maintaining a lightweight and thin design.
Implementation Method 1
at least one of the first polarizer and the second polarizer has a light scattering structure
Data Source
Figure 1
Figure 2~3
Figure 4~5
AI summary
According to a liquid crystal display panel and a display device in the present disclosure, since at least one of a first polarizer and a second polarizer has a light scattering structure, polarized light of corresponding colors transmitted by sub-pixel units with different colors in a liquid crystal display structure can be uniformly diffused by the light scattering structure. That is to say, the light scattering structure plays a role for uniformly mixing the polarized light of different colors. Therefore, the rainbow pattern phenomenon is effectively improved or even eliminated, and the display quality is improved.