Gate Driving Circuit Charge Release Mechanism
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Solution Overview
Problem
The last driving circuit unit in a liquid crystal display accumulates charges over time, leading to reduced operational effectiveness and inaccurate signal output.
Innovation Solution
A gate driving circuit with a control unit that sequentially outputs driving signals to scan lines and transmits a control signal to each driving circuit unit, including the last unit, to release accumulated charges, ensuring all units operate effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the gate driving circuit operates continuously without charge release mechanism for the last stage, then the circuit structure remains simple, but the last driving circuit unit accumulates charges and cannot operate effectively
Solution Approach 1:
The patent applies preliminary action by providing a charge release mechanism that is activated after the Nth driving circuit unit outputs its driving signal. The control unit transmits a control signal to at least one driving circuit unit to release accumulated charges before the next scanning cycle begins, preventing charge accumulation from affecting subsequent operations.
Solution Approach 2:
The patent implements feedback by using the output signal from the Nth driving circuit unit as a trigger to activate the charge release mechanism. When the Nth driving circuit unit outputs its driving signal, the control unit detects this signal and automatically transmits a control signal to release accumulated charges in previous stages, creating a closed-loop charge management system.
2Productivity
If no charge release control is implemented, then the driving circuit operates continuously, but the last driving circuit unit accumulates charges over time leading to signal inaccuracy
Solution Approach 1:
The patent applies periodic action by implementing charge release at regular intervals - specifically after each scanning cycle when the Nth driving circuit unit outputs its signal. This periodic charge release ensures that accumulated charges are cleared at consistent intervals, maintaining signal accuracy throughout continuous operation without interrupting the overall driving function.
3Reliability
If the control unit transmits control signals to release charges in all driving circuit units, then charge accumulation is prevented, but the control signal transmission complexity increases
Solution Approach 1:
The patent applies universality by using a single control unit to perform multiple functions: it controls the sequential operation of all N driving circuit units, manages the charge release timing, and transmits control signals to appropriate stages. This centralized control approach prevents charge accumulation while avoiding the need for separate control mechanisms for each driving circuit unit.
Data Source
AI summary
A gate driving circuit for driving plural scan lines of a liquid crystal display includes N driving circuit units and a control unit. Each of the N driving circuit units sequentially outputs a driving signal to drive a corresponding scan line of the scan lines. The control unit outputs a positive-phase and an opposite-phase clock signal to control the N driving circuit units. After an Nth driving circuit unit of the N driving circuit units outputs the driving signal, the control unit transmits a control signal to at least one of the N driving circuit units. A method for driving the foregoing gate driving circuit is also disclosed.