Display Panel Pre-Charge Circuit for Faster Pixel Charging
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Solution Overview
Problem
Existing display panels suffer from low actual brightness due to insufficient charging efficiency of pixel circuits, primarily caused by the impedance and parasitic capacitance of data-signal lines, leading to longer charging times and poor display effects, especially at low brightness levels.
Innovation Solution
Incorporation of a pre-charge circuit that provides a pre-charge voltage signal to the data-signal line before data signals are written into the pixel circuit, reducing the impact of line loads and accelerating the charging process by ensuring the data-signal line reaches the desired potential quickly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If data signals are directly written into pixel circuits through data-signal lines, then the pixel circuits can be updated with new data, but the charging time is extended due to impedance and parasitic capacitance of the data-signal lines, reducing actual brightness
Solution Approach 1:
The pre-charge circuit applies a pre-charge voltage signal to the data-signal line before the data signal is written into the pixel circuit. This preliminary action charges the data-signal line in advance, reducing the impact of parasitic capacitance and impedance during the actual data writing phase, thereby shortening the charging time and improving display brightness
2Productivity
If the data-signal line is charged quickly to desired potential, then the charging efficiency of pixel circuits is improved, but additional pre-charge circuitry is required, increasing device complexity
Solution Approach 1:
The pre-charge circuit serves as an intermediary component between the data source and the pixel circuit. It temporarily stores and conditions the voltage signal on the data-signal line before data writing, acting as a buffer that simplifies the overall system by decoupling the data writing operation from the charging process
Data Source
AI summary
The present disclosure includes a display panel and a display apparatus. The display panel includes a pre-charge circuit, a data-signal line and a pixel circuit, where the pre-charge circuit is electrically connected to the pixel circuit through the data-signal line; and before a data signal is written into the pixel circuit, the pre-charge circuit provides a pre-charge voltage signal to the data-signal line, and the data-signal line is charged through the pre-charge voltage signal.