Transflective Display Panel Shielding Layer Design
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Solution Overview
Problem
Transflective LCDs suffer from color mixing and low color gamut due to color resistance mixing and oblique electric fields, which adversely affect image quality and user experience.
Innovation Solution
A display panel design featuring a shielding layer with light shielding units and a reflective layer arranged in an array structure, where the light shielding units and reflective units form specific sub-regions and spaces to prevent color mixing, allowing for maximum reflectivity without the need for a black matrix, and utilizing polarizers with optimized phase compensation to improve light polarization and reduce leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a black matrix is used to prevent color mixing in transflective LCDs, then color mixing is reduced, but the black matrix may peel or suffer from alignment fluctuations, reducing reliability
Solution Approach 1:
The patent extracts and removes the black matrix component from the display structure. Instead of using a black matrix to prevent color mixing, the invention employs a reflective layer with light shielding units that achieve color separation without requiring a black matrix, thereby eliminating peeling and alignment issues associated with black matrices
Solution Approach 2:
The patent introduces a reflective layer with light shielding units as an intermediary structure between the color filter and the liquid crystal layer. This reflective layer with integrated light shielding units serves as a mediator that prevents color mixing while avoiding the reliability issues of traditional black matrices
2Illumination intensity
If a reflective layer is added to achieve transflective mode, then reflectivity is improved, but color mixing occurs due to oblique electric fields, reducing image quality
Solution Approach 1:
The reflective layer is segmented into multiple light shielding units with different reflective properties for different color regions. Each light shielding unit is designed to reflect specific wavelength ranges, creating distinct color zones that prevent color mixing while maintaining high reflectivity
Solution Approach 2:
Different regions of the reflective layer are assigned different local qualities - specific areas have enhanced reflectivity for red, green, or blue light respectively. This local differentiation of reflective properties prevents color mixing by ensuring each color region reflects its designated wavelength range while blocking others
3Object-affected harmful factors
If light shielding units are made larger to prevent color mixing, then color gamut is improved, but the display area is reduced, affecting productivity
Solution Approach 1:
The patent transitions from a two-dimensional planar black matrix to a three-dimensional reflective layer structure with vertical light shielding units. This dimensional change allows light shielding units to extend vertically without proportionally increasing horizontal footprint, preventing color mixing while preserving display area
Solution Approach 2:
The light shielding units are nested within the reflective layer structure, with the shielding function integrated into the reflective architecture. This nesting allows the light shielding functionality to be embedded without adding significant external dimensions, maintaining display area while preventing color mixing
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 solution significantly reduces color mixing in transmissive mode, improving user experience by enhancing color gamut and reflectivity while maintaining process compatibility and avoiding issues like black matrix peeling or alignment fluctuations.
Implementation Method 1
the shielding layer includes a plurality of groups of light shielding units sequentially arranged along a first direction
Implementation Method 2
the reflective layer includes a plurality of reflective units arranged in an array along the first direction and the second direction
Implementation Method 3
utilizing polarizers with optimized phase compensation to improve light polarization and reduce leakage
Data Source
AI summary
A display panel includes a second substrate. The second substrate includes a second base substrate and a shielding layer, an array structure layer, an insulating layer and a reflective layer which are sequentially disposed on a second base substrate, the array structure layer includes gate lines; the shielding layer includes a plurality of groups of light shielding units sequentially arranged along a first direction, each group of the light shielding units includes a plurality of independent sub-light shielding units sequentially arranged along a second direction, the reflective layer includes a plurality of reflective units arranged in an array, the plurality of reflective units form a plurality of reflective rows and a plurality of reflective columns, a first space area is formed between adjacent reflective columns, and a second space area is formed between adjacent reflective rows forms.