LVDS Noise Detection Circuit for Display Data Integrity
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Solution Overview
Problem
Display apparatuses face picture quality issues due to noise interference in low-voltage differential signal (LVDS) transmission lines, particularly from high-frequency signals emitted by nearby devices like smartphones, which can cause failures in image data transmission.
Innovation Solution
A data driving circuit with a noise detection circuit that senses the common mode voltage of LVDS transmission lines and compares it with reference voltages to determine noise presence, generating a noise flag to control image data retransmission and adjust transmission voltages, thereby improving picture quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If image data is transmitted through LVDS transmission line, then data transmission speed is improved, but noise interference from high-frequency signals causes picture quality degradation
Solution Approach 1:
The patent introduces a noise detection circuit as an intermediary component between the LVDS transmission line and the image processing system. This circuit monitors the common mode voltage on the transmission line and detects noise interference, enabling the system to identify when noise is present and take appropriate corrective actions such as retransmitting corrupted data packets.
Solution Approach 2:
The noise detection circuit provides feedback about the quality of transmitted data by monitoring common mode voltage levels. When noise is detected, the system can respond by requesting retransmission or adjusting transmission parameters, creating a closed-loop system that maintains data integrity despite the presence of electromagnetic interference from nearby devices.
2Reliability
If noise detection circuit is added to detect common mode voltage, then picture quality is improved, but device complexity increases
Solution Approach 1:
The noise detection circuit is designed to perform multiple functions: it monitors common mode voltage for noise detection, generates error signals when noise is detected, and can trigger retransmission protocols. By consolidating these functions into a single integrated circuit rather than separate components, the patent reduces overall system complexity while maintaining reliable noise detection capabilities.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution effectively detects and mitigates noise in LVDS transmission lines, enhancing display data quality and preventing picture quality problems by allowing for timely retransmission of image data and voltage adjustments.
Implementation Method 1
a noise detection circuit to sense a common mode voltage of an LVDS in a positive line and a negative line of the LVDS transmission line
Data Source
AI summary
The present embodiment provides a technology for sensing a common mode voltage in the positive line and negative line of a transmission line for image data and determining whether noise occurs in the image data transmitted through the transmission line by comparing the common mode voltage with a set reference voltage.