Display Panel Light Blocking Zone Asymmetry for Cross-Talk Reduction
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Solution Overview
Problem
In traditional display panels, the placement of polarization structures between the color filter layer and the liquid crystal layer leads to increased spacing, causing incident light with angles greater than 14.59° to deviate from the corresponding color sub-pixel area, resulting in cross-talking and abnormal image display due to depolarization effects and quantum-dot electroluminescence mechanisms.
Innovation Solution
A display panel structure with a liquid crystal layer between two substrates, where one substrate has light transmission and blocking zones arranged to reduce the spacing and increase the blocking zone size, minimizing light deviation and cross-talking by optimizing the angle and ratio of these zones, thereby reducing the impact of incident light angles on image display.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a polarization structure is placed between the color filter layer and the liquid crystal layer, then the contrast and polarization state are improved, but the spacing distance increases causing light deviation and cross-talking
Solution Approach 1:
The patent changes the physical parameters of the light blocking zone, specifically increasing its length in the first direction to create an extended shadow effect. This parameter modification allows the light blocking zone to compensate for light deviation caused by increased spacing, thereby maintaining contrast improvement while mitigating cross-talking between adjacent sub-pixels
Solution Approach 2:
The patent introduces asymmetry in the light blocking zone design by making its length in the first direction greater than its length in the second direction. This asymmetric configuration optimizes the shadow casting in the critical first direction where light deviation occurs, allowing effective cross-talk prevention while minimizing impact on the second direction
2Device complexity
If the spacing distance between color filter layer and TFT layer is increased, then the polarization structure can be arranged, but incident light with angle greater than 14.59° deviates from the corresponding color sub-pixel area
Solution Approach 1:
The patent modifies the geometric parameters of the light blocking zone, specifically setting its length in the first direction to be 3-6 times its length in the second direction. This parameter change creates an extended shadow region that accommodates oblique incident light up to certain angles, thereby increasing tolerance to incidence angle variations while maintaining precise light control
Solution Approach 2:
The patent addresses the angle tolerance problem by extending the light blocking zone in the first direction, effectively using the first direction dimension to compensate for angular deviations. This dimensional approach allows light rays at various angles to still be blocked before reaching adjacent sub-pixels, improving manufacturing precision tolerance
3Reliability
If the light blocking zone size is increased, then light cross-talking is reduced, but the area of light transmission zones decreases
Solution Approach 1:
The patent applies asymmetry by designing the light blocking zone with significantly greater length in the first direction compared to the second direction. This asymmetric shape allows effective cross-talk prevention in the critical first direction (where polarization structure spacing causes deviation) while minimizing the area reduction impact on light transmission zones in the second direction
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 proposed structure effectively reduces light deviation and cross-talking by adjusting the size and arrangement of light transmission and blocking zones, enhancing image display quality by ensuring that incident light remains within the corresponding color sub-pixel area, thus improving contrast and reducing abnormal image display issues.
Implementation Method 1
upper and lower polarizers are often provided on two opposite sides of a color filter layer for forming, in combination with liquid crystal optics, a color luminous panel
Implementation Method 2
it is necessary to place the polarization structure between the color filter layer and the liquid crystal layer
Data Source
AI summary
A display panel includes a liquid crystal layer arranged between first and second substrates. The first substrate includes, consecutively connected, a first light transmission zone, a first light blocking zone, and a second light transmission zone. The second substrate includes, consecutively connected, a third light transmission zone, a second light blocking zone, and a fourth light transmission zone. A projection of the first light blocking zone cast on the second substrate has an area covering the second light blocking zone. The first light blocking zone functions to block, when first light is projected onto the first light transmission zone, the first light from projecting onto the second light transmission zone, and the second light blocking zone functions to block, when second light is projecting onto the third light transmission zone, the second light from projecting onto the fourth light transmission zone. A display device is also provided.