Display Device Timing Controller EMI Reduction via Verification Signals
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Solution Overview
Problem
Liquid crystal displays face challenges with electromagnetic interference (EMI) due to high-frequency data transmission, which existing technologies have not adequately addressed without compromising data accuracy.
Innovation Solution
A display device and driving method that utilize a timing controller to generate verification signals, comparing them with source driving verification signals to adjust display data signals, minimizing amplitude and reducing EMI while ensuring accurate data transmission through a high-speed and low-speed interface combination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If high-frequency data transmission is used, then data transmission speed is improved, but electromagnetic interference increases
Solution Approach 1:
The patent implements a feedback mechanism where the driver circuit generates a verification signal based on the received data signal, compares it with an original verification signal from the timing controller, and feeds back adjustment information to minimize EMI while maintaining data accuracy
Solution Approach 2:
The patent dynamically adjusts signal parameters (amplitude, timing) based on verification signal comparison results, changing transmission characteristics to reduce electromagnetic interference while preserving data integrity
2Object-generated harmful factors
If signal amplitude is reduced to minimize EMI, then electromagnetic interference is decreased, but data accuracy may be compromised
Solution Approach 1:
The verification signal mechanism provides continuous feedback to ensure data accuracy is maintained even when signal amplitude is adjusted to reduce EMI levels
Solution Approach 2:
The verification signal acts as an intermediary that carries validation information separately from the data signal, allowing amplitude reduction without compromising the ability to verify data accuracy
3Measurement precision
If verification signals and adjustment mechanisms are added, then data transmission accuracy is improved, but device complexity increases
Solution Approach 1:
The verification signal mechanism serves multiple functions simultaneously: data validation, EMI detection, and transmission quality monitoring, reducing the need for separate dedicated circuits for each function
Data Source
AI summary
A display device and a driving method, comprising: a time sequence controller generating a time sequence control verification signal on the basis of a display data signal; a high-speed interface of the time sequence controller transmitting the display data signal to a driver, and a low-speed interface of the time sequence controller transmitting a time sequence control verification signal to the driver; the driver generating a source driving verification signal on the basis of the display data signal; the driver comparing the source driving verification signal to the time sequence control verification signal; and on the basis of the comparison result, the driver triggering the time sequence controller to adjust the display data signal.