M-Phase Gate Driving with Auxiliary Pre-Charging
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Solution Overview
Problem
Existing display devices face issues with gate lines not transitioning quickly to a non-selected state due to delayed driving of discharge circuits, leading to display defects.
Innovation Solution
A display device with M-phase driving signals that transition between selected and non-selected states, including a pre-charging and main charging period, where auxiliary circuits are driven during the main charging period to ensure timely switching of gate lines to a non-selected state.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the discharge circuit is driven at the end of the gate line selection period, then the gate line can be switched to a non-selected state, but the switching may be delayed causing display defects
Solution Approach 1:
The auxiliary circuit is driven during the main charging period to preliminarily prepare the gate line for switching, ensuring that the discharge operation can execute promptly at the end of the selection period without delay, thus resolving the contradiction between switching reliability and switching speed
2Speed
If the auxiliary circuit is driven during the main charging period, then the gate line transitions quickly to non-selected state, but the circuit complexity increases
Solution Approach 1:
The auxiliary circuit is designed to perform multiple functions: it operates during the main charging period to prepare for switching, and can also function during the pre-charging period of the next gate line. This multi-functionality reduces the need for additional dedicated circuits, thereby mitigating the increase in device complexity while maintaining fast switching speed
Data Source
AI summary
A display device has a display panel including gate lines, a driving circuit, and an auxiliary circuit corresponding to each gate lines. To the driving circuit and the auxiliary circuit, one driving signal of M-phase driving signals (M≥4) having selection potential and non-selection potential, is supplied. The driving circuit outputs the driving signal to a corresponding gate line. A selection period for the gate line includes a pre-charging period and a main charging period, and the main charging period overlaps with the pre-charging period for the adjacent gate line. The auxiliary circuit is driven during the main charging period for the corresponding gate line and during the main charging period for the next gate line. The auxiliary circuit outputs the selection potential during the main charging period for the corresponding gate line, and outputs the non-selection potential during the main charging period for the next gate line.