Scalable Intra-Panel Interface for Display Error Monitoring
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Solution Overview
Problem
The existing intra-panel interface between a time controller (TCON) and source drivers in display devices lacks effective communication for error reporting, leading to increased hardware size and cost due to separate voltage rails and explicit clock transmission, which causes electromagnetic interference and inefficient error detection.
Innovation Solution
A scalable intra-panel interface with a single auxiliary status channel (ASC) for bidirectional communication, allowing source drivers to report symbol and bit errors to the TCON without explicit clock transmission, using DC-coupled differential pairs and a shared communication line to reduce hardware complexity and electromagnetic interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If explicit clock transmission is used for communication between TCON and source drivers, then data synchronization is achieved, but electromagnetic interference increases
Solution Approach 1:
The patent extracts the clock signal transmission from the data communication interface by having source drivers independently generate their own clock signals. This separation eliminates the harmful electromagnetic interference caused by explicit clock transmission while maintaining data synchronization through the data channel only.
Solution Approach 2:
Source drivers are equipped with internal clock generation capabilities, allowing them to self-generate clock signals without receiving them from the TCON. This self-service approach eliminates the need for separate clock transmission lines and reduces electromagnetic interference in the communication interface.
2Reliability
If separate voltage rails are used for transmitting data from TCON to source driver, then communication reliability is improved, but hardware size and cost increase
Solution Approach 1:
The patent merges the clock signal generation function into the source driver itself, combining what were previously separate functions (data transmission and clock transmission) into a single data channel. This consolidation reduces hardware complexity while maintaining communication reliability through proper signal conditioning and timing control.
Solution Approach 2:
The data channel is designed to serve multiple functions: transmitting both data and timing information. The single auxiliary channel performs dual roles in error reporting and control, reducing the overall number of hardware components needed while maintaining full communication capability between TCON and source drivers.
3Reliability
If visual examination is used to locate display errors, then error detection is possible, but time consumption and efficiency are reduced
Solution Approach 1:
The patent implements a feedback mechanism where source drivers automatically monitor and report transmission errors and operational status back to the TCON through the auxiliary channel. This automated feedback system eliminates the need for time-consuming visual examinations by providing real-time error detection and reporting.
Solution Approach 2:
The auxiliary channel serves as an intermediary communication path that enables automatic error reporting from source drivers to TCON. This intermediary channel allows for efficient error detection and diagnostics without requiring manual visual inspection, significantly reducing time loss while maintaining error detection capability.
Data Source
AI summary
A system and a method are disclosed for an intra-panel communication interface which, among other advantages, enhances system reliability and reduces bus width. A timing controller initializes communication with a plurality of source drivers by transmitting link data through a plurality of data channels and monitors source driver status through an auxiliary status channel. The plurality of source drivers share the auxiliary status channel to indicate their status. The timing controller transmits display data to a source driver through a data channel. The display data includes a request for status data from the source driver. The source driver transmits the requested status data to the timing controller via the auxiliary status channel.