Display Panel Pre-Charge Circuit for Scan Line Charging
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Solution Overview
Problem
The short charging time for each scan line in high-resolution display panels results in low charging voltage and insufficient brightness, affecting the display effect, and existing technologies relying on Gate-Chip On Film (G-COF) have limitations in supporting simultaneous pre-charging of multiple lines.
Innovation Solution
A pre-charge method for display panels that includes a pre-charge circuit connected to multiple scan lines, allowing the first pre-charge switch to turn on and synchronously output the gate enabling signal to the next scan line, enabling higher charging voltage without requiring simultaneous output from the gate driving circuit, thus avoiding the limitations of G-COF.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the resolution of the display panel is increased, then the display quality is improved, but the charging time for each scan line becomes shorter resulting in lower charging voltage and insufficient brightness
Solution Approach 1:
The patent applies preliminary action by pre-charging the (N+1)th scan line while the Nth scan line is being charged. The first pre-charge switch circuit receives the Nth gate enabling signal and proactively charges the next scan line before its official charging turn, ensuring sufficient charging voltage and time for high-resolution displays without compromising display quality
2Duration of action of moving object
If a pre-charge circuit is added to extend charging time, then the charging voltage is improved, but the device complexity increases
Solution Approach 1:
The patent merges the pre-charge function with the existing gate driving circuit by integrating the first pre-charge switch circuit into the scan line driving architecture. The pre-charge circuit shares control signals and timing with the main charging circuit, allowing extended charging time without adding completely separate control systems or significantly increasing overall circuit complexity
Solution Approach 2:
The first pre-charge switch circuit serves multiple functions: it acts as a pre-charge path for the (N+1)th scan line, receives control from the Nth gate enabling signal, and integrates with the existing gate driving circuitry. This multi-functional design extends charging capability while minimizing additional complexity by making the pre-charge circuit serve several purposes within the display driving system
Data Source
AI summary
This application discloses a pre-charge method for a display panel, a display panel and a display device. The pre-charge method for the display panel includes steps of outputting a gate enabling signal; receiving an Nth gate enabling signal by an Nth scan line; and synchronously outputting the Nth gate enabling signal to a (N+1)th scan line; N being a natural number more than or equal to 1.