Source Driver Equalization for Stable Display Data Transmission
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Solution Overview
Problem
Existing display technologies face challenges in ensuring display quality due to manual setting of equalization gain in source driver chips, which is not adaptable to changes in temperature and electromagnetic interference.
Innovation Solution
A method and system for transmitting data that includes transmitting equalization matching data to the source driver chip for automatic equalization, determining a target equalization gain, and performing gain compensation based on this gain to ensure display quality, even in the presence of temperature and electromagnetic interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If manual setting of equalization gain is used in source driver chips, then device complexity is reduced, but display quality cannot adapt to environmental changes
Solution Approach 1:
The source driver chip automatically performs equalization by receiving equalization matching data from the timing controller, determining target equalization gain independently, and applying gain compensation without external intervention. This self-service mechanism enables adaptation to temperature and electromagnetic interference changes while maintaining reasonable device complexity.
Solution Approach 2:
The timing controller transmits equalization matching data to the source driver chip before normal display data transmission begins. This preliminary action allows the source driver chip to pre-determine the target equalization gain and configure equalization parameters in advance, ensuring display quality adapts to environmental conditions before actual display operations start.
2Reliability
If automatic equalization is implemented, then display quality is maintained under environmental variations, but data transmission complexity increases
Solution Approach 1:
The data transmission process is segmented into distinct phases: first transmitting equalization matching data for automatic equalization configuration, then transmitting normal display data. This segmentation allows the complex automatic equalization function to be separated from the main display data transmission, maintaining reliability while organizing complexity into manageable segments.
Solution Approach 2:
Equalization matching data serves as an intermediary element between the timing controller and source driver chip. This intermediary data structure carries the necessary information for automatic equalization without requiring complex direct control signals, simplifying the overall transmission protocol while enabling reliable display quality maintenance.
3Measurement precision
If equalization matching data is transmitted frequently, then equalization accuracy is improved, but transmission time increases
Solution Approach 1:
The system transmits equalization matching data periodically based on frame counters. Specifically, equalization matching data is transmitted every M frames (where M is a positive integer), providing regular equalization updates that maintain accuracy without requiring transmission after every single frame, thus balancing precision with time efficiency.
Data Source
AI summary
Provided is a method for transmitting data. The method includes: transmitting equalization matching data to a source driver chip upon sending a link stable pattern to the source driver chip, wherein the equalization matching data is configured for the source driver chip to determine a target equalization gain, and perform gain compensation, based on the target equalization gain, on display data from the timing controller; and transmitting the display data to the source driver chip in response to a first condition being met, wherein the first condition is that the source driver chip determines the target equalization gain. Prior to transmitting the equalization matching data to the source driver chip upon sending the link stable pattern to the source driver chip, the method further includes transmitting equalization gain configuration information to the source driver chip.