Display Panel Filter Group Prevents Light Leakage
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Solution Overview
Problem
Full-color OLED displays face a color deviation issue due to light leakage between signal lines and white sub-pixel regions, affecting the display effect.
Innovation Solution
The display panel incorporates a filter group with non-overlapping light transmission wavelength ranges for first and second filter blocks, positioned between white and color sub-pixel regions to prevent light leakage, and includes color filter films with materials matching the filter blocks for efficient manufacturing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If signal lines are placed between white sub-pixel region and color sub-pixel region, then electrical connection is achieved, but light leakage occurs causing color deviation
Solution Approach 1:
The patent introduces a filter group as an intermediary element between the signal lines and the sub-pixel regions. This filter group includes a first filter block and a second filter block with non-overlapping light transmission wavelength ranges, which selectively blocks leaked light while allowing necessary electrical signals to pass through, thus resolving the contradiction between maintaining electrical connection and preventing light leakage.
Solution Approach 2:
The patent applies different filtering properties to different regions: the first filter block and second filter block have distinct light transmission characteristics tailored to their specific positions. The filter group is locally optimized to block light leakage in specific wavelength ranges while maintaining transparency in other ranges, addressing the light leakage problem without compromising overall display quality.
2Object-affected harmful factors
If filter group is added to prevent light leakage, then display quality improves, but manufacturing complexity increases
Solution Approach 1:
The patent merges the light filtering function with the existing signal line structure by positioning the filter group to overlap with the signal lines. This integration allows the filter group to serve dual purposes: blocking light leakage and maintaining electrical signal transmission, thereby improving display quality without proportionally increasing manufacturing complexity.
Solution Approach 2:
The filter group is designed to perform multiple functions simultaneously: it blocks light leakage in specific wavelength ranges, allows electrical signals to pass through, and maintains compatibility with existing signal line configurations. This multi-functionality reduces the need for separate components and simplifies the overall manufacturing process.
3Object-affected harmful factors
If multiple filter blocks with non-overlapping wavelength ranges are used, then light leakage is effectively blocked, but material selection and manufacturing precision requirements increase
Solution Approach 1:
The patent segments the filtering function into multiple distinct filter blocks, each responsible for blocking specific wavelength ranges. This segmentation allows for modular manufacturing and assembly, where each filter block can be independently fabricated and then precisely positioned using standardized alignment techniques, thereby managing manufacturing precision requirements more effectively.
Solution Approach 2:
The patent employs composite material structures in the filter blocks, combining different materials with complementary optical properties to achieve non-overlapping light transmission wavelength ranges. This use of composite materials enables precise control over light filtering characteristics while allowing for flexible manufacturing and alignment tolerances.
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 solution effectively prevents light leakage and color deviation, enhancing the display effect by filtering white light between signal lines and improving production efficiency through simplified manufacturing processes.
Implementation Method 1
a light transmission wavelength range of the first filter block does not overlap with a light transmission wavelength range of the second filter block
Data Source
AI summary
A display panel has pixel regions each includes sub-pixel regions, one of the sub-pixel regions is a white sub-pixel region, and remaining sub-pixel regions are color sub-pixel regions. The display panel includes signal lines and at least one filter group. The signal lines include two signal lines, a portion of each of the two signal lines is disposed between one white sub-pixel region and an adjacent color sub-pixel region, and there is a space between the two signal lines. Each filter group includes a first filter block and a second filter block, and a light transmission wavelength range of the first filter block does not overlap with that of the second filter block. An overlapping portion of the first filter block and the second filter block that are in one filter group covers a portion of the space disposed between the white sub-pixel region and the adjacent color sub-pixel region.