Display Driving Method ESD Signal Adjustment
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Solution Overview
Problem
Liquid crystal panels face interference issues due to electrostatic discharge (ESD), leading to flickering lines or black belts on the screen, which current protection mechanisms struggle to effectively mitigate.
Innovation Solution
A display driving method that adjusts the data enable signal by referencing a previous frame's data enable signal when ESD occurs, ensuring the signal is not interfered with and preventing abnormal signals from being written to the timing controller.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If current protection mechanisms are used to detect ESD interference, then the system can identify abnormal signals, but the mechanisms fail to effectively prevent display abnormalities such as flickering lines and black belts
Solution Approach 1:
The patent applies preliminary action by replacing the data enable signal with the reference signal in advance when ESD interference is detected, before the interference can cause display abnormalities. The timing controller proactively substitutes the abnormal signal with a clean reference signal, preventing flickering lines and black belts rather than reacting after damage occurs.
Solution Approach 2:
The patent introduces a reference signal as an intermediary to mediate between the corrupted data enable signal and the display output. When ESD interference is detected, the reference signal serves as a clean substitute that passes through the timing controller without interference, effectively isolating the display system from harmful signals.
2Productivity
If the data enable signal is directly used without adjustment when ESD occurs, then the signal processing is simple and fast, but the timing controller receives interfered signals causing display abnormalities
Solution Approach 1:
The reference signal acts as an intermediary between the corrupted data enable signal and the timing controller. When ESD interference is detected, instead of directly passing the interfered signal or performing complex analysis, the system uses the clean reference signal as a substitute, maintaining fast processing while ensuring signal integrity.
Solution Approach 2:
The patent extracts the harmful interference from the data enable signal by detecting voltage abnormalities and removes the corrupted signal path, replacing it with a clean reference signal path. This extraction of the harmful element allows the system to maintain fast processing speed while ensuring reliability.
3Measurement precision
If signal analysis is performed to determine whether the data enable signal is abnormal, then accurate detection is possible, but the processing time increases and response to ESD is delayed
Solution Approach 1:
The patent replaces complex mechanical signal analysis with an electrical voltage threshold comparison. Instead of analyzing signal waveforms or patterns, the system simply compares the voltage of the data enable signal against a preset threshold, achieving fast and accurate ESD detection without time-consuming analysis.
Solution Approach 2:
The patent changes the detection parameter from complex signal analysis to simple voltage level comparison. By monitoring whether the signal voltage exceeds a predetermined threshold, the system achieves both high detection accuracy and fast response time, eliminating the need for time-consuming signal processing.
Data Source
AI summary
A display driving method, a display driving device, and an electronic device. The display driving method includes: obtaining a voltage value of a power supply ground signal; obtaining a reference data enable signal and a data enable signal to be analyzed when the voltage value of the power supply ground signal is greater than or equal to an electrostatic discharge voltage threshold; adjusting the data enable signal to be analyzed according to the reference data enable signal to obtain a current frame data enable signal; and writing the current frame data enable signal to a timing controller.