Flat Display Panel Blocking Lines Eliminate Black Matrix
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional LCD panels face issues with misalignment during substrate bonding, leading to lower aperture rates and increased manufacturing costs due to the need for precise formation of the color filter on the thin film transistor array substrate.
Innovation Solution
A flat display panel design that eliminates the black matrix layer by incorporating blocking lines made of the same metallic layer as the scan lines, which are broader than the data lines and placed parallel to them, reducing the risk of misalignment and manufacturing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the color filter is integrated on the thin film transistor array substrate to form a COA substrate, then misalignment between substrates is eliminated, but manufacturing precision requirements increase and cost increases
Solution Approach 1:
The invention extracts and removes the color filter layer from the COA substrate structure, retaining only the blocking lines (black matrix) on the TFT array substrate. This simplifies the manufacturing process by eliminating the complex color filter formation steps while maintaining the alignment benefits of the integrated structure.
Solution Approach 2:
The invention applies blocking lines only in specific locations where light blocking is needed (around pixel electrodes and along data lines), rather than requiring a complete color filter layer across the entire substrate. This localized approach reduces manufacturing precision requirements while maintaining display quality.
2Object-affected harmful factors
If the black matrix layer is retained on the TFT array substrate, then light blocking is achieved, but misalignment issues occur during substrate bonding
Solution Approach 1:
The invention segments the black matrix into separate blocking lines that are formed independently along data lines and around pixel electrodes. This segmentation allows each blocking line to be precisely positioned without requiring overall alignment of a continuous black matrix layer, thereby eliminating misalignment issues during substrate bonding.
Solution Approach 2:
The blocking lines serve multiple functions: they block light leakage, define pixel boundaries, and provide alignment references for subsequent layers. This multi-functionality eliminates the need for a separate black matrix layer while maintaining all its original benefits.
3Illumination intensity
If the aperture rate is increased to improve light transmittance, then display brightness improves, but light blocking control becomes more difficult
Solution Approach 1:
The blocking lines are formed in advance during the TFT array substrate manufacturing process, before substrate bonding. This preliminary positioning of light-blocking structures ensures precise alignment and effective light blocking even when the aperture rate is increased in subsequent design iterations.
Data Source
AI summary
The present invention proposes to a flat display panel and a method for forming the same. The flat display panel includes a plurality of rows of scan lines, a plurality of columns of data lines and a plurality of blocking lines which are parallel and overlapped to the data lines. The plurality of blocking lines are placed at one side of pixel electrodes one on one and made of the same metallic layer with the plurality of scan lines. Each blocking line made of the same metallic layer with the scan line is wider than a corresponding data line, so that light not blocked by the data line is blocked by the wider blocking line.