Display Module Noise Detection via Parallel Video Data Comparison
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Solution Overview
Problem
Existing noise detection methods for liquid crystal displays (LCDs) are inadequate for determining whether an LCD is qualified for noise control before leaving the factory, as they lack efficient mechanisms to convert and compare parallel video data effectively.
Innovation Solution
A noise detection device and method utilizing a storage module, processing module, and encoding module to convert parallel video data into serial data, compare it with received mini-LVDS data, and determine the bit error rate, with a field-programmable gate array and digital video imaging encoding chip for processing and encoding, respectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If parallel video data is converted to serial data and back for noise detection, then the ability to determine noise control qualification is improved, but the device complexity increases due to requiring encoding module, storage module, and processing module
Solution Approach 1:
The noise detection device is divided into three functional modules: storage module for storing parallel video data, encoding module for converting parallel data to serial data, and processing module for receiving and comparing data. This segmentation allows each module to perform its specific function efficiently, enabling comprehensive noise detection while maintaining modular design for easier implementation and maintenance.
2Measurement precision
If parallel video data undergoes encoding conversion to serial data and back, then noise detection accuracy is improved, but the detection time and processing duration increase
Solution Approach 1:
The storage module stores parallel video data in advance before the actual noise detection process. This preliminary preparation allows the detection system to have test data ready, eliminating the need for real-time data generation during detection and reducing overall detection time while maintaining measurement accuracy.
Solution Approach 2:
The system creates a copy of the original parallel video data through the encoding process (converting to serial data and back), which allows comparison between the original and converted data. This copying mechanism enables accurate bit error rate measurement without requiring the original data to be destroyed or modified, and can be performed efficiently with proper buffer management.
Data Source
AI summary
A noise detection device of a display module, including: a storage module, a processing module and an encoding module; the storage module is used to store parallel video data, the processing module is used to transmit the stored parallel video data to the encoding module, the encoding module is used to convert the stored parallel video data into serial video data through encoding and to transmit the converted serial video data to a timing controller of a display module; the processing module is used to receive mini-LVDS data generated by the timing controller based on the converted serial data, and to convert the mini-LVDS data into the parallel video data; the processing module is used to compare the stored parallel video data with the converted parallel video data, and to determine whether the display module is qualified for noise control according to the comparison result.