Driving Circuit All-Gate-On Unit Simultaneous Discharge
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Solution Overview
Problem
Conventional driving circuits cannot simultaneously control all gate lines to turn on switching elements, leading to ghosting and image flutter, which negatively impact display quality and user experience.
Innovation Solution
A driving circuit with multiple shift register units, at least one scan control unit, and an all-gate-on unit, allowing for simultaneous output of driving signals during the discharging phase, enabling all gate lines to be controlled simultaneously to discharge electric charges.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the driving circuit drives the gate lines row by row using conventional shift register units, then the device complexity is reduced and ease of manufacture is improved, but the switching elements cannot be turned on simultaneously and the pixel electrodes cannot discharge simultaneously, resulting in ghosting and image flutter that deteriorate display quality
Solution Approach 1:
The driving circuit is divided into multiple independent driving units, each comprising a scan control unit and a shift register unit. Each driving unit can independently control a specific gate line, enabling simultaneous operation of multiple gate lines during the discharging phase while maintaining sequential operation during the driving phase. This segmentation allows the system to achieve simultaneous discharge without increasing overall system complexity.
Solution Approach 2:
The driving circuit dynamically switches between two operation modes: a driving phase where gate lines are controlled sequentially row by row, and a discharging phase where all gate lines are controlled simultaneously. The scan control units and all-gate-on units enable this dynamic mode switching, allowing the system to optimize for both ease of manufacture (sequential mode) and display quality (simultaneous discharge mode) at different times.
2Reliability
If the driving circuit enables simultaneous output of driving signals from all driving units during the discharging phase, then the pixel electrodes can discharge simultaneously to eliminate ghosting and image flutter, but the device complexity increases due to the addition of all-gate-on units and multiple clock control terminals
Solution Approach 1:
The scan control units serve multiple functions: they control the shift register units during the driving phase to enable sequential row-by-row operation, and they work with all-gate-on units during the discharging phase to enable simultaneous operation of all gate lines. This multi-functionality reduces the need for separate control circuits for different operation modes, thereby limiting the increase in device complexity.
Solution Approach 2:
The driving circuit operates in periodic cycles, alternating between a driving phase (sequential operation) and a discharging phase (simultaneous operation). During the discharging phase, all-gate-on units activate all driving units simultaneously to discharge pixel electrodes. This periodic action allows the system to achieve simultaneous discharge for display quality improvement while spending most time in the simpler sequential operation mode, thus limiting overall complexity increase.
Data Source
AI summary
A driving circuit is provided, which includes multiple shift register units, at least one scan control unit and at least one all-gate-on unit. An operation of the driving circuit includes a driving phase and a discharging phase. During the driving phase, the at least one scan control unit controls the shift register units to output multiple driving signals successively in a first direction or in a second direction, the first direction being opposite to the second direction. During the discharging phase, the at least one all-gate-on unit controls the shift register units to output multiple driving signals simultaneously. An array substrate and a display apparatus each including the driving circuit are further provided.