Scan Drive Control Circuit Layout for Stable Display Output
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Solution Overview
Problem
Existing display technologies face challenges in optimizing the design of scan drive control circuits for display substrates, particularly in flexible OLED and QLED displays, to enhance stability and efficiency of signal transmission.
Innovation Solution
The proposed display substrate incorporates a base substrate with a scan drive control circuit that includes specific length ratios and overlapping areas for capacitors and power supply lines, along with precise transistor connections, to improve signal storage and output stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the scan drive control circuit uses conventional capacitor designs without optimized length ratios, then the circuit layout is simpler, but the node stability and output stability deteriorate
Solution Approach 1:
The patent applies parameter changes by optimizing the length ratios of capacitors (LC1k/LY, LC2k/LY) and overlapping areas (SC3-1/SC3, SC2k-1/SC2) to specific numerical ranges. These parameter optimizations enhance node stability and output stability without fundamentally changing the circuit architecture, resolving the contradiction between reliability and device complexity.
2Reliability
If the scan drive control circuit uses conventional capacitor and power supply line arrangements, then the design process is faster, but the signal transmission stability deteriorates
Solution Approach 1:
The patent applies local quality by optimizing specific local arrangements of capacitors and power supply lines. The overlapping areas between capacitors and power supply lines are precisely controlled (SC3-1/SC3 and SC2k-1/SC2 within specific ranges), creating localized quality improvements that enhance signal transmission stability without requiring high precision across the entire circuit.
3Reliability
If the scan drive control circuit uses optimized capacitor length ratios and overlapping areas, then the output stability improves, but the design and manufacturing complexity increases
Solution Approach 1:
The patent specifies concrete parameter ranges (LC1k/LY: 0.05-0.15, LC2k/LY: 0.20-0.50, SC3-1/SC3: 0.10-0.40, SC2k-1/SC2: 0.10-0.40) that balance output stability improvement with manufacturing feasibility. These parameter changes provide clear design guidelines that simplify the manufacturing process while achieving the desired stability performance.
Data Source
AI summary
A display substrate, including a scan drive control circuit including an input circuit, an output control circuit, and an output circuit; the input circuit is configured to transmit a signal of the signal input terminal to the output control circuit and a signal of the first clock signal terminal or the first voltage terminal to the output control circuit; the output control circuit is configured to store a signal of the first signal terminal, and transmit a signal of the second signal terminal to the first node; or, the output control circuit is configured to store a signal of the second clock signal terminal, and transmit a signal of the second voltage terminal to the first node; the output circuit is configured to output a signal of the first voltage terminal to the signal output terminal, or output the signal of the second voltage terminal to the signal output terminal.