Display Substrate Shielding Structure for Vertical Crosstalk Reduction
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Solution Overview
Problem
The vertical crosstalk phenomenon in OLED display products, primarily caused by voltage drops on power supply signal lines and data signal variations on data lines, affects display quality and needs to be addressed.
Innovation Solution
A display substrate design incorporating a shielding member between data lines and adjacent sub-pixels, coupled to initialization signal lines, to reduce coupling effects and minimize vertical crosstalk, featuring a sub-pixel driving circuit with specific transistor configurations and shielding structures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If data lines are placed close to sub-pixels for compact layout, then device area is reduced, but vertical crosstalk increases due to coupling effects
Solution Approach 1:
A shielding member is introduced as an intermediary element between the data line and the sub-pixel. This shielding member includes a first shielding portion positioned between the data line and the sub-pixel, and a second shielding portion positioned between the data line and the initialization signal line. The shielding member effectively blocks the coupling effect and vertical crosstalk while allowing the data line to maintain a compact layout, thus resolving the contradiction between reducing device area and preventing vertical crosstalk.
2Reliability
If shielding members are added to reduce vertical crosstalk, then display quality improves, but device complexity increases
Solution Approach 1:
The shielding member is merged with the initialization signal line structure. The shielding member includes a first shielding portion and a second shielding portion that are electrically connected to the initialization signal line, forming an integrated structure. This merging approach reduces the number of independent components and simplifies the manufacturing process while still providing effective shielding against vertical crosstalk, thus improving display quality without excessively increasing device complexity.
3Object-affected harmful factors
If shielding structures are implemented between data lines and sub-pixels, then vertical crosstalk is reduced, but manufacturing complexity increases
Solution Approach 1:
The shielding member is segmented into multiple portions: a first shielding portion positioned between the data line and the sub-pixel, and a second shielding portion positioned between the data line and the initialization signal line. Each portion serves a specific shielding function and can be independently optimized. This segmentation allows for flexible manufacturing and integration with existing pixel structures, reducing the overall manufacturing complexity while maintaining effective crosstalk suppression.
Data Source
AI summary
A display substrate is provided. The display substrate includes a substrate and a plurality of sub-pixels arranged in an array on the substrate; The sub-pixel includes a data line pattern extending in a first direction; an initialization signal line pattern including a portion extending in a second direction, the second direction intersecting the first direction, the initialization signal line pattern configured to transmit an initialization signal having a fixed potential; a sub-pixel driving circuit including a driving transistor, a first transistor coupled to a gate of the driving transistor, and a first shielding member coupled to an initialization signal line pattern, an orthographic projection of the first shielding member on a substrate, between the orthographic projection of the first transistor on the substrate and the orthographic projection of the target data line pattern on the substrate; a target data line pattern is included in the next sub-pixel adjacent to the sub-pixel in the second direction.