GOA Shift Register Touch Potential Control Circuit
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The implementation of touch functions in small and medium-sized liquid crystal display screens is hindered by gate driver circuits, specifically the Gate on Array (GOA) circuit, which increases power consumption and can lead to touch function failure due to the output of gate driving signals during the touch phase.
Innovation Solution
A shift register circuit with a touch potential control circuit that controls the pull-up and pull-down nodes to a low level during the touch phase, preventing the output of gate driving signals and reducing overall power consumption by keeping the gate driving signal at a low level.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the GOA circuit outputs gate driving signals during the touch phase, then the gate driver circuit can maintain its driving function, but the touch sensitivity is reduced and touch function may fail
Solution Approach 1:
The patent implements dynamic control of the GOA circuit by introducing a touch potential control circuit that can switch the circuit between different operational states. During touch phase, the control circuit dynamically adjusts the potential levels to prevent gate driving signal output, while during display phase, the circuit returns to normal driving operation. This dynamic switching mechanism resolves the contradiction by adapting the circuit behavior to different operational requirements.
Solution Approach 2:
The patent applies preliminary action by pre-controlling the potential levels of the pull-up and pull-down nodes before the touch phase begins. The touch potential control circuit is configured to anticipate the touch phase requirement and proactively sets the nodes to appropriate potential levels, ensuring that no gate driving signals are accidentally output during touch operations. This preliminary preparation prevents touch sensitivity issues before they can occur.
2Reliability
If the GOA circuit is kept in working state during touch phase, then the gate driving signal can be output when needed, but the overall power consumption increases
Solution Approach 1:
The patent implements periodic action by dividing the operational cycle into distinct phases: display phase and touch phase. During the touch phase, the GOA circuit is placed in a low-power state where gate driving signals are suppressed. During the display phase, the circuit returns to its normal working state. This periodic switching between active and low-power states reduces overall power consumption while ensuring gate driving signals are available when actually needed for display operations.
Solution Approach 2:
The patent applies the discarding and recovering principle by temporarily discarding the gate driving signal output capability during the touch phase to reduce power consumption. The touch potential control circuit intentionally disables the signal output function when touch operations are detected. After the touch phase completes, the circuit recovers its full functionality and returns to normal gate driving operation. This temporary discarding of function during specific phases enables significant power savings without permanent loss of capability.
Data Source
AI summary
The present disclosure provides a shift register circuit, a GOA circuit and a display device. The shift register circuit includes a shift register sub-circuit. The shift register sub-circuit includes a pull-up node, a pull-down node and a touch potential control circuit. The touch potential control circuit is coupled to a touch potential control terminal, an output terminal of the shift register sub-circuit, the pull-up node, the pull-down node and a low level output terminal, respectively. The touch potential control circuit is configured to, under control of the touch potential control terminal in a touch phase, control each of the output terminal of the shift register sub-circuit, the pull-up node and the pull-down node to be coupled to the low level output terminal.