Display Panel Light-Blocking Area Color Filter Design
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Solution Overview
Problem
Existing display panels face challenges in designing a light-blocking area that effectively prevents color mixing between pixels and light leakage, while also reducing external light reflection.
Innovation Solution
The display panel incorporates a light-blocking area around pixel areas, utilizing a combination of color filters and quantum dots on the upper and lower display substrates to control light passage and prevent color mixing, with a yellow color filter overlapping the light-blocking area to block blue light.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a light-blocking area is designed to prevent color mixing between pixels, then color purity is improved, but device complexity increases due to multiple color filter layers
Solution Approach 1:
The patent combines multiple color filter layers (first, second, third, and fourth color filters with different wavelength selectivity) into a single integrated light-blocking area structure. This merging approach achieves comprehensive color mixing prevention through the combined optical effects of multiple filters, resolving the contradiction by integrating complex functionality into a unified structure rather than using separate components.
Solution Approach 2:
The light-blocking area employs a composite structure with multiple color filter layers having different optical properties. Each layer is designed to block specific wavelength ranges, and their combination creates a composite filtering system that prevents color mixing more effectively than single-layer filters, while the integrated design manages the structural complexity.
2Reliability
If multiple color filters are used to block different wavelengths, then light leakage prevention is improved, but manufacturing complexity increases
Solution Approach 1:
The patent segments the light-blocking function into multiple specialized color filter layers, where each layer (first, second, third, fourth color filters) is responsible for blocking specific wavelength ranges. This segmentation allows each layer to be optimized for its specific function, improving overall light leakage prevention while enabling modular manufacturing approaches that can simplify the production process.
Solution Approach 2:
Different regions of the light-blocking area employ different color filter configurations tailored to local requirements. The first and second color filters are positioned over pixel areas with specific wavelength blocking needs, while the third and fourth filters address different spectral ranges, creating locally optimized filtering that improves reliability without requiring uniform complex structures throughout.
3Manufacturing precision
If color filters are positioned to overlap pixel areas and light-blocking area, then color control precision is improved, but alignment difficulty increases
Solution Approach 1:
The patent implements a nested arrangement where color filter layers are stacked in specific sequences (first, second, third, fourth color filters) with each layer positioned to overlap and complement the others. This nesting creates a hierarchical structure where inner layers are precisely positioned relative to outer layers, achieving high color control precision through cumulative optical effects while maintaining manufacturability through standardized stacking procedures.
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 configuration reduces external light reflection, prevents color mixing between pixels, and minimizes light leakage in the light-blocking area, thereby enhancing the display panel's performance and manufacturing efficiency.
Implementation Method 1
a third color filter which is disposed on the base substrate, overlaps the light-blocking area and the third pixel area, has first and second openings corresponding to the first and second pixel areas, respectively, and allows light having a wavelength different from those of the first color filter and the second color filter to pass therethrough
Implementation Method 2
a fourth color filter which is disposed on the base substrate, overlaps the light-blocking area, the first pixel area, and the second pixel area, has a third opening corresponding to the third pixel area, and allows light having a wavelength different from that of the third color filter to pass therethrough
Implementation Method 3
utilizing a combination of color filters and quantum dots on the upper and lower display substrates to control light passage and prevent color mixing, with a yellow color filter overlapping the light-blocking area to block blue light
Implementation Method 4
a first color control layer which overlaps the first pixel area and includes a first quantum dot that converts source light into first color light passing through the first color filter, and a second color control layer which overlaps the second pixel area and includes a second quantum dot that converts the source light into second color light passing through the second color filter
Data Source
AI summary
A display panel includes an upper display substrate. The upper display substrate includes a base substrate and first to fourth color filters. The first and second color filters overlap first and second pixel areas. The third color filter overlaps a light-blocking area and a third pixel area and has a first opening and a second opening corresponding to the first pixel area and second pixel area, respectively. The fourth color filter overlaps the first pixel area and the second pixel area and has a third opening corresponding to the third pixel area.