Oxide Transistor Display Substrate With Low-Resistance Scan Lines
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Solution Overview
Problem
Existing display substrates using Low Temperature Poly-Silicon (LTPS) thin film transistors face reduced yield and high costs as the size of the display substrate increases, leading to poor display performance.
Innovation Solution
A display substrate design incorporating a drive circuit layer with oxide transistors, including a plurality of circuit units and signal lines, and a light emitting structure layer, utilizing a net-like structure for signal transmission and oxide transistors connected via vias, with a storage capacitor and oxide thin film transistors to enhance display quality and reduce power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If LTPS thin film transistors are used in display substrates, then display performance can be maintained, but yield decreases and costs increase as substrate size increases
Solution Approach 1:
The patent changes the material parameter from LTPS semiconductor to oxide semiconductor, which fundamentally alters the transistor characteristics. This material substitution enables high-performance displays while improving manufacturing yield and reducing costs, as oxide transistors can be fabricated with simpler processes that are less sensitive to substrate size variations
2Reliability
If LTPS thin film transistors are used in display substrates, then display performance can be maintained, but manufacturing costs increase as substrate size increases
Solution Approach 1:
The patent changes the material parameter from LTPS semiconductor to oxide semiconductor, which fundamentally alters the transistor characteristics. This material substitution enables high-performance displays while improving manufacturing yield and reducing costs, as oxide transistors can be fabricated with simpler processes that are less sensitive to substrate size variations
3Device complexity
If conventional transistors are used, then process flow is complex, but power consumption is higher
Solution Approach 1:
The patent changes the material parameter from LTPS semiconductor to oxide semiconductor, which fundamentally alters the transistor characteristics. This material substitution enables high-performance displays while improving manufacturing yield and reducing costs, as oxide transistors can be fabricated with simpler processes that are less sensitive to substrate size variations
Data Source
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AI summary
A display substrate, a preparation method therefor, and a display apparatus. The display substrate comprises a drive circuit layer arranged on a base, the drive circuit layer comprising a plurality of circuit units, at least one scan signal line, and at least one data signal line; at least one circuit unit comprises a pixel drive circuit, the pixel drive circuit at least comprises a plurality of oxide transistors, and at least one oxide transistor is respectively connected to a scan signal line and a data signal line; in a direction perpendicular to the base, the drive circuit layer at least comprises, successively arranged in a direction away from the base, a first source/drain metal layer and a second source/drain metal layer, the first source/drain metal layer at least comprising a scan signal line, and the second source/drain metal layer at least comprising a data signal line. By arranging a scan signal line on the first source/drain metal layer, the present disclosure effectively reduces the electrical resistance of the scan signal line, thereby reducing a scan signal voltage drop, effectively increasing compensation speed, and improving display quality.