Display Panel Switching Device for Residual Charge Clearance
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Solution Overview
Problem
Display panels experience flickers and abnormal displays due to residual charges formed when in sleep mode, affecting image rendering upon resuming operation.
Innovation Solution
Incorporation of a switching device in the display panel that disconnects power to the drive chip during sleep mode and reconnects it when image display is required, preventing current leakage to data lines and ensuring the drive chip is in a non-working state until active use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the drive chip remains powered during sleep mode, then the display panel can quickly resume operation, but current leakage occurs to data lines forming residual charges that cause flickers
Solution Approach 1:
The switching device is activated before the drive chip to preemptively disconnect power supply and clear residual charges from data lines. This preliminary action prevents the formation of harmful residual charges that would otherwise cause display flickers, ensuring clean electrical state before the drive chip enters sleep mode.
Solution Approach 2:
A switching device is introduced as an intermediary component between the power supply and the drive chip. This switching device controls the connection state, allowing power to be disconnected during sleep mode while preventing direct current leakage to data lines, thus eliminating residual charge formation without affecting quick resume capability.
2Reliability
If the switching device is activated before the drive chip, then residual charges are cleared effectively, but the timing control complexity increases
Solution Approach 1:
The control signals for the switching device and the drive chip are merged into a unified timing sequence. The switching device and drive chip are controlled to activate and deactivate together in a coordinated manner, simplifying the overall timing control while ensuring residual charges are cleared effectively before the drive chip enters sleep mode.
Data Source
AI summary
Provided are a display panel and a display device. The display panel includes a drive chip and a switching device, and the drive chip includes a digital interface inputting terminal, a positive driving voltage inputting terminal and a negative driving voltage inputting terminal, and the switching device includes a first switching inputting terminal, a second switching inputting terminal, a third switching inputting terminal, a switching control terminal, a first switching outputting terminal corresponding to the first switching inputting terminal, a second switching outputting terminal corresponding to the second switching inputting terminal and a third switching outputting terminal corresponding to the third switching inputting terminal. The first switching inputting terminal, the second switching inputting terminal, the third switching inputting terminal and the switching control terminal are configured to be electrically connected to a main circuit board. The first switching outputting terminal is electrically connected to the digital interface inputting terminal.