Source Driver Noise Detection for Display Flickering
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Solution Overview
Problem
Mobile phones with high-frequency antennas interfere with signals transmitted between the timing controller and the source driver IC in display devices, causing display issues like flickering and bright lines due to signal interference.
Innovation Solution
A display device with a detecting unit and processor in the source driving circuit that detects noise signals on conducting wires and selectively outputs either the first or second frame data voltage to mitigate interference, ensuring stable display performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the mobile phone uses high-frequency antennas for transmission, then communication performance is improved, but signal interference occurs between the timing controller and source driver IC
Solution Approach 1:
The patent introduces a detecting unit as an intermediary component between the timing controller and source driver IC. This detecting unit monitors the conducting wire for noise signals caused by high-frequency interference and triggers the processor to selectively output frame data voltages, thereby mediating the harmful interaction between the mobile phone's high-frequency antenna and the display signal transmission path
Solution Approach 2:
The patent converts the harmful noise signal detection into a beneficial control mechanism. By detecting the presence of noise on the conducting wire, the system identifies interference conditions and responds by selectively outputting frame data voltages, thus transforming the harmful interference into a trigger for corrective action that improves display stability
2Device complexity
If the timing controller outputs normal signals continuously, then signal transmission simplicity is maintained, but display abnormalities occur due to undetected noise interference
Solution Approach 1:
The patent implements a feedback mechanism where the detecting unit continuously monitors the conducting wire for noise signals and provides feedback to the processor. Based on this feedback, the processor selectively outputs frame data voltages to correct display abnormalities, thereby maintaining display reliability without significantly increasing signal transmission complexity
Solution Approach 2:
The source driver IC performs self-diagnosis and self-correction by incorporating the detecting unit and processor within itself. The detecting unit autonomously monitors for noise signals, and the processor autonomously decides whether to selectively output frame data voltages, enabling the system to self-correct display abnormalities without external intervention
Data Source
AI summary
A display device and screen displaying method are provided in this disclosure. The screen displaying method includes the following operations: detecting whether a noise signal on a conducting wire by a detecting unit; outputting a horizontal synchronizing signal and a data signal to a source driving circuit by a timing controller; wherein the data signal includes a first frame data voltage and a second frame data voltage according to the timing sequence; and receiving the first frame data voltage and the second frame data voltage by the source driving circuit, when the detecting unit is configured to detect the noise signal, the processor is configured to selectively output the first frame data voltage or the second frame data voltage.