Display Substrate Line Layout for Under-Screen Sensor Stability
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Solution Overview
Problem
OLED display devices applied to under-screen sensor products face issues with transmittance that affect sensor functionality due to inadequate design of signal lines and connections, leading to poor transmittance and stability.
Innovation Solution
A display substrate design with optimized signal line arrangements and conductive connections, including a reset signal line and initialization signal line, where the orthographic projections of these lines and their connections are strategically positioned to minimize overlap and reduce the size of conductive connection portions, thereby enhancing transmittance and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the signal lines and conductive connections are designed with conventional layouts, then the circuit connectivity is ensured, but the transmittance of the OLED display device deteriorates
Solution Approach 1:
The patent positions the orthographic projection of the first electrode between the orthographic projections of the reset signal line and initialization signal line, creating a layered spatial arrangement that reduces planar overlap while maintaining electrical connectivity through vertical stacking of conductive elements
Solution Approach 2:
The patent divides the signal transmission path into separate dedicated lines (reset signal line and initialization signal line) with spatially separated projections, segmenting the circuit layout to reduce interference and improve transmittance while maintaining functional connectivity
2Reliability
If the conductive connection portion is designed with sufficient size to ensure connectivity, then the electrical connection is reliable, but the layout complexity and parasitic capacitance increase
Solution Approach 1:
The patent optimizes the conductive connection portion by positioning it locally between specific signal lines with controlled projection overlap, creating a localized connection structure that minimizes parasitic capacitance while ensuring reliable electrical connectivity where needed
3Productivity
If the orthographic projections of signal lines and electrodes overlap significantly, then the circuit density is improved, but the crosstalk and parasitic capacitance increase
Solution Approach 1:
The patent resolves crosstalk issues by transitioning from planar separation to three-dimensional spatial arrangement, where the first electrode's projection is positioned between signal line projections, allowing vertical stacking that maintains density while reducing lateral interference and parasitic capacitance
Data Source
AI summary
The present disclosure provides a display substrate, and a display device. The display substrate includes a base substrate and a plurality of sub-pixels arranged on the base substrate; the sub-pixels include: a reset signal line, at least a part of the reset signal line extending along a first direction; an initialization signal line, at least a part of the initialization signal line extending along the first direction; a first transistor, a gate electrode of the first transistor being coupled to the reset signal line, a first electrode of the first transistor being coupled to the initialization signal line, an orthographic projection of at least part of the first electrode of the first transistor on the base substrate being located between an orthographic projection of the reset signal line on the base substrate and an orthographic projection of the initialization signal line on the base substrate.