Display Panel Shift Register Isolation for Gate Signal Accuracy
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Solution Overview
Problem
Display anomalies arise due to leakage currents in driver circuits of display panels, affecting the accuracy of gate signals and overall display performance.
Innovation Solution
Incorporation of an isolation control module in shift registers to manage signal transmission paths, ensuring accurate gate drive signals by maintaining signal integrity despite potential leakage currents.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If driver circuits are used to drive pixel arrays in display panels, then display function is enabled, but leakage currents arise internally leading to display anomalies
Solution Approach 1:
The patent introduces an isolation control module as an intermediary component between the first control module and the output module in the shift register. This isolation control module acts as a mediator that selectively connects or disconnects the signal transmission path between nodes based on control signals, preventing leakage currents from affecting the gate drive signal output while maintaining normal display functionality
Solution Approach 2:
The patent implements dynamic control of the isolation control module's on/off state based on the input signal level. When the input signal is at an effective level, the isolation control module is turned on to allow signal transmission; when the input signal jumps to an ineffective level, the isolation control module is turned off to block leakage currents. This dynamic adjustment resolves the contradiction between maintaining display function and preventing signal degradation
2Productivity
If shift registers are used to generate gate signals, then progressive scanning is enabled, but leakage currents affect gate signal accuracy
Solution Approach 1:
The isolation control module serves as a mediator in the shift register circuit, selectively blocking the signal path to prevent leakage currents from reaching the gate drive signal output node while allowing intentional signal transmission during effective input signal periods, thus maintaining gate signal accuracy
Solution Approach 2:
The patent applies preliminary anti-action by proactively turning off the isolation control module when the input signal becomes ineffective, preventing leakage currents from affecting the gate signal before they can cause display anomalies. This preemptive measure ensures signal accuracy is maintained throughout the scanning process
Data Source
AI summary
A display panel includes a driver circuit; in a shift register in the driver circuit, a first control module is electrically connected to a signal input terminal, a first clock terminal and a first node; an isolation control module is electrically connected to an isolation control terminal, the first node and a second node; in the same first-type shift register, during at least part of the duration when the input signal of the signal input terminal is at an effective level, the isolation control signal of the isolation control terminal controls the isolation control module to turn on a signal transmission path between the first node and the second node; at least after the input signal jumps from an effective level to an ineffective level, the isolation control signal controls the isolation control module to disconnect the signal transmission path between the first node and the second node.