Display Panel Black Matrix With Linear Polarizer Layer
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Solution Overview
Problem
In liquid crystal display panels, the formation of a flexible spacer layer is challenging, as traditional methods can compromise the aperture ratio due to the placement of polymer wall spacers outside the black matrix, leading to reduced display efficiency.
Innovation Solution
A display panel design featuring a first display substrate with a black matrix including a linear polarizer layer in the inter-subpixel region, which allows for the formation of polymer wall spacers outside the subpixel region without reducing the aperture ratio, using a wire grid polarizer layer with perpendicular light transmission axes to act as a black matrix, and a method involving photoreactive monomers polymerized by UV irradiation to create spacers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If polymer wall spacers are placed outside the black matrix, then the aperture ratio is reduced, but the spacer formation becomes simpler
Solution Approach 1:
The patent combines the black matrix layer and spacer layer into a single integrated structure. The black matrix is formed to extend into the spacer region, creating a unified layer that serves both as light-blocking element and as the base for spacer formation. This eliminates the need to choose between placing spacers inside or outside the black matrix, as the black matrix itself becomes part of the spacer structure.
Solution Approach 2:
The patent extends the black matrix layer in the thickness direction (z-direction) to form a stepped structure. The black matrix has different heights in different regions: a first height in the pixel region and a second height in the spacer region. This dimensional extension allows the black matrix to serve multiple functions at different levels, resolving the contradiction between aperture ratio and spacer formation.
2Quantity of substance
If the black matrix is extended into the spacer region, then the aperture ratio is improved, but the manufacturing precision requirements increase
Solution Approach 1:
The black matrix layer is designed to perform multiple functions: light blocking in the pixel region and spacer formation in the spacer region. By making the black matrix extend into the spacer region with different heights, a single layer structure achieves what would traditionally require separate black matrix and spacer layers, reducing overall manufacturing complexity despite the extended pattern requirements.
3Object-generated harmful factors
If a wire grid polarizer is used as black matrix, then light blocking efficiency is improved, but the device complexity increases
Solution Approach 1:
The patent changes the material composition and optical parameters of the black matrix by incorporating a wire grid polarizer. The wire grid polarizer has specific wire dimensions (width and spacing) that are optimized to block light effectively. By adjusting these parameters, the black matrix achieves superior light blocking efficiency while maintaining a relatively simple layered structure.
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 maintains the aperture ratio by forming polymer wall spacers outside the subpixel region, ensuring efficient light blocking and flexible display panel construction.
Implementation Method 1
a black matrix in the inter-subpixel region and on the first base substrate, and comprising a linear polarizer layer in a first region of the inter-subpixel region and outside the subpixel region; wherein a light transmission axis of the linear polarizer layer and a light transmission axis of the first polarizer are substantially perpendicular to each other
Implementation Method 2
a method involving photoreactive monomers polymerized by UV irradiation to create spacers
Data Source
AI summary
The present application discloses a display panel having an inter-subpixel region and a subpixel region. The display panel includes a first display substrate and a second display substrate facing each other; and a spacer layer having a plurality of spacers for maintaining a spacing between the first display substrate and the second display substrate. The first display substrate includes a first base substrate; and a black matrix in the inter-subpixel region and on the first base substrate, and including a linear polarizer layer in a first region of the inter-subpixel region and outside the subpixel region. An orthographic projection of the linear polarizer layer on the first base substrate substantially covers projections of the plurality of spacers on the first base substrate.