Display Panel Asymmetric Light-Shielding Structure
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Solution Overview
Problem
Display panels experience significant variations in brightness when viewed from different angles due to the polarizer's absorption axis, affecting user experience by either being too bright or too dim depending on the viewing angle.
Innovation Solution
A display panel design featuring a light-emitting device layer with sub-pixels that include light-emitting and non-light-emitting regions, a light-shielding layer, and a polarizer where the minimum distance between the light-emitting region and the light-shielding structure varies along different directions, with the first distance being larger than the second distance, optimizing light shielding and transmission based on the polarizer's orientation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a polarizer is used in the display panel, then the display brightness is relatively high when viewed along the direction perpendicular to the absorption axis, but the display brightness becomes low when viewed along the absorption axis direction
Solution Approach 1:
The patent applies asymmetry by making the light-shielding structure extend further in the second direction (perpendicular to absorption axis) than in the first direction (along absorption axis). Specifically, the distance from the light-emitting region boundary to the light-shielding structure is larger in the second direction than in the first direction. This asymmetric design compensates for the polarizer's directional brightness characteristics, reducing the brightness difference between different viewing angles and improving overall viewing experience.
2Illumination intensity
If the light-shielding structure is positioned closer to the light-emitting region in the second direction than in the first direction, then more light can pass through along the absorption axis, but light shielding effectiveness is reduced perpendicular to the absorption axis
Solution Approach 1:
The patent applies local quality by creating non-uniform light shielding distances in different directions from the light-emitting region. The light-shielding structure is positioned at different distances from the light-emitting region boundary along the first direction (absorption axis) versus the second direction (perpendicular to absorption axis). This localized variation in shielding distance optimizes light transmission along the absorption axis while maintaining adequate shielding perpendicular to it, addressing the directional brightness issue.
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 design reduces the brightness difference when viewed from different angles, enhancing the uniformity of display brightness and improving user experience by allowing more light to enter when viewed along the absorption axis and blocking light when viewed perpendicular to it.
Implementation Method 1
a polarizer, disposed on the side of the light-shielding layer away from the base substrate and having an absorption axis in a first direction
Data Source
AI summary
A display panel includes a base substrate; and a light-emitting device layer, disposed on the base substrate and including sub-pixels. A sub-pixel includes light-emitting regions and a non-light-emitting regions located between adjacent light-emitting regions. The display panel includes a light-shielding layer, disposed on the side of the light-emitting device layer away from the base substrate and including a light-shielding structure located in the non-light-emitting region; and a polarizer, disposed on the side of the light-shielding layer away from the base substrate and having an absorption axis in a first direction. In each sub-pixel, along the first direction, the minimum distance between the boundary of the light-emitting region and the light-shielding structure is a first distance B; along a second direction intersected with the first direction, the minimum distance between the boundary of the light-emitting region and the light-shielding structure is a second distance A; and B>A.