Register Circuit Reset Mechanism for Display Driver Leakage
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Solution Overview
Problem
Existing scanning circuits in display units are prone to operational failures due to current leakage, which affects the reliability and efficiency of pixel selection and signal transmission in flat-panel displays and solid-state image pickup units.
Innovation Solution
A resistor circuit is introduced, comprising transistors and capacitors, which includes an output circuit, an input circuit, and a reset circuit, to reduce current leakage by stabilizing gate voltages and controlling signal transmission through a shift register circuit with control signal lines, thereby enhancing the reliability of the driver circuit and display unit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional shift register circuit is used for scanning pixels, then the circuit can sequentially select pixels and transmit signals, but current leakage causes operational failures and reduces reliability
Solution Approach 1:
A reset circuit is introduced as an intermediary component between the input circuit and the output circuit. This reset circuit includes a reset transistor and a reset capacitor that work together to clear accumulated charge and prevent current leakage from affecting the scanning operation, thereby resolving the reliability issue caused by current leakage
Solution Approach 2:
The reset circuit performs preliminary action by resetting the gate voltage of the output transistor before the scanning signal is applied. This preliminary reset ensures that no residual charge or current leakage from previous operations interferes with the current scanning operation, preventing operational failures
2Productivity
If the shift register circuit operates continuously to scan all pixels, then pixel selection and signal transmission are maintained, but current leakage accumulates and causes failures
Solution Approach 1:
The reset circuit provides feedback by monitoring the charge accumulation state and automatically resetting when necessary. This feedback mechanism allows the circuit to maintain continuous scanning operation while preventing current leakage from causing failures, thus preserving both productivity and reliability
Solution Approach 2:
The reset circuit discards accumulated charge and potential leakage effects by periodically resetting the gate voltage. This allows the circuit to recover from the harmful effects of current leakage and continue operating efficiently without cumulative failures
Data Source
AI summary
A register circuit includes an output circuit and an input circuit. The output circuit includes a first transistor and a second transistor. The first transistor is provided in a first electrically-conductive path between a first control terminal and an output terminal. The second transistor is provided in a second electrically-conductive path between a first power terminal and the output terminal. The input circuit includes a third transistor and a fourth transistor. The third transistor is provided in a third electrically-conductive path between an input terminal and a gate terminal of the first transistor. The fourth transistor is provided in a fourth electrically-conductive path between a second control terminal and a gate terminal of the third transistor and has a gate terminal that is coupled to the input terminal.