Array Substrate Protrusions Prevent ITO Residue Short Circuits
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Solution Overview
Problem
In existing array substrates, the residue of ITO in the opening of the color filter layer causes a short circuit between the pixel electrode and the DBS electrode, leading to reduced product yield and display effect.
Innovation Solution
The array substrate design includes a color filter layer with first and second protrusions surrounding the opening, which cover the gap between the data line and drain, preventing photoresist accumulation and ensuring ITO etching, thus avoiding short circuits between the pixel and DBS electrodes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the color filter layer has a half-opened opening with two structures of pixel electrode and DBS electrode simultaneously present, then the design allows for advanced electrode configuration, but the photoresist layer accumulates on the bottom side of the color filter layer and cannot be removed, causing ITO to remain and short-circuit between electrodes
Solution Approach 1:
The opening in the color filter layer is segmented into multiple regions by dividing it into a first opening region and a second opening region. This segmentation allows different photoresist removal processes to be applied to different regions, enabling complete photoresist removal while maintaining the complex electrode configuration. The first photoresist removal process targets the first opening region, and the second photoresist removal process targets the second opening region, ensuring thorough cleaning without causing short-circuits.
Solution Approach 2:
A protrusion structure is added to the color filter layer at the opening position before the photoresist removal process. This preliminary structural modification creates a platform that prevents photoresist accumulation and facilitates complete photoresist removal. The protrusion is formed in advance to guide the subsequent photoresist removal processes and ensure clean edges without residue.
2Illumination intensity
If the pixel size is reduced and the number of domains is increased to achieve excellent viewing angle performance, then the viewing angle performance is improved, but the transmittance of the panel is seriously reduced
Solution Approach 1:
The color filter layer is designed with different opening configurations in different regions. The first opening region and second opening region have different characteristics optimized for their specific functions. This local quality approach allows the panel to maintain high transmittance in certain areas while providing the necessary domain structures for wide viewing angles in other areas, balancing both requirements effectively.
Data Source
AI summary
The present invention provides an array substrate and a display panel, wherein the first protrusion and the second protrusion are provided in the filter unit of the color filter layer, and the second gap between the data line and the drain is covered with the first protrusion and/or the second protrusion, to solve the problem that a residue of the ITO exists in the second gap, which causes short circuit between the pixel electrode and the DBS electrode, such that the product yield is elevated, and the display effect is improved, thus enhancing customer experience.