Source Driver Abnormality Detection via Dual Data Path Comparison
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Solution Overview
Problem
Existing display devices face challenges in detecting failures in the data receiving part of the source driver, particularly due to the requirement for cyclic redundancy check (CRC) support on both the timing controller and the data receiving side, which limits failure detection depending on the communication interface type.
Innovation Solution
A source driver configuration that includes a selector to output serial data signals from either of two transmission lines, with a comparison circuit to compare parallel data from both lines, allowing for abnormality detection without relying on CRC support from the data transmitting side, using a first and second data receiving part and serial-parallel conversion circuits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If CRC method is used for failure detection, then failure detection capability is improved, but device complexity increases and compatibility is reduced
Solution Approach 1:
The patent creates a copy of the data path by duplicating the serial data signal through a selector to a second data receiving part. This copied path allows for comparison verification without requiring complex CRC protocols, as the system simply compares identical data copies to detect abnormalities in the receiving path.
Solution Approach 2:
The system performs self-verification by using its own data paths to check for abnormalities. The comparison circuit autonomously compares data from the first and second receiving parts, enabling the system to self-diagnose receiving path failures without external monitoring or complex interface protocols.
2Reliability
If CRC support is required on both transmitting and receiving sides, then failure detection accuracy is improved, but adaptability is reduced
Solution Approach 1:
The patent creates a copy of the data path by duplicating the serial data signal through a selector to a second data receiving part. This copied path allows for comparison verification without requiring complex CRC protocols, as the system simply compares identical data copies to detect abnormalities in the receiving path.
Solution Approach 2:
The invention creates a universal failure detection mechanism that works across different interface types without requiring CRC support. The dual-path comparison method is interface-agnostic and can be applied to various communication protocols, making the system highly adaptable while maintaining failure detection capability.
3Reliability
If dual transmission lines are used for data reception, then abnormality detection capability is improved, but device complexity increases
Solution Approach 1:
The patent segments the data reception function into two independent paths: a first data receiving part and a second data receiving part. This segmentation allows the system to compare results from separate paths to detect abnormalities, distributing the detection function across multiple simple components rather than one complex verification system.
Solution Approach 2:
The patent creates a copy of the data path by duplicating the serial data signal through a selector to a second data receiving part. This copied path allows for comparison verification without requiring complex CRC protocols, as the system simply compares identical data copies to detect abnormalities in the receiving path.
Data Source
AI summary
A source driver is provided, including a first data receiving part that receives a serial data signal via the first transmission line, a selector that outputs a serial data signal from either the first transmission line or the second transmission line according to a switching signal, a second data receiving part that receives the serial data signal output from the selector, a first serial-parallel conversion circuit that serial-parallel converts the serial data signal received by the first data receiving part and outputs the converted signal as first parallel data, a second serial-parallel conversion circuit that serial-parallel converts the serial data signal received by the second data receiving part and outputs the converted signal as second parallel data, and a comparison circuit that compares the first parallel data with the second parallel data and outputs a comparison result when the selector outputs the serial data signal from the first transmission line.