Multi-Level Signal Encoding Without Reference Voltage Circuits
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Solution Overview
Problem
Current data transmission methods using encoded multi-level signals face challenges in determining signal levels, leading to potential errors and increased circuit complexity due to the lack of reference voltage and limited space for command signals in compact display panel designs.
Innovation Solution
The method employs multiple multi-level signals, such as ternary or quaternary signals, transmitted through multiple channels, where each signal has distinct levels, allowing for efficient data transmission without additional reference voltages and enabling embedded clock signaling to simplify circuit design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If encoded multi-level signals are used for data transmission, then data transmission efficiency is improved, but circuit complexity increases due to the need for additional reference voltage
Solution Approach 1:
The patent combines data transmission and command signal transmission into a single multi-level signal channel. By encoding both data and commands into the same signal stream using distinct signal levels, the invention eliminates the need for separate reference voltage circuits and additional command signal lines, thereby reducing circuit complexity while maintaining high transmission efficiency
Solution Approach 2:
The multi-level signal serves multiple functions simultaneously: it carries both data information and command information (such as clock signaling) through different signal levels. This multi-functionality allows a single transmission channel to replace what would traditionally require separate channels, reducing the overall circuit complexity
2Device complexity
If one-to-one mapping of data to multi-level signals is used, then data transmission is simplified, but space for command signals is eliminated
Solution Approach 1:
The invention changes the parameter space by using multiple signal levels beyond the minimum required for data encoding. For example, in a quaternary level system, instead of using only 4 levels for 2-bit data, additional levels are incorporated to encode command signals. This parameter expansion allows the system to maintain simple mapping logic while gaining the versatility to transmit commands
Solution Approach 2:
The patent incorporates command signals as preliminary actions within the data transmission stream. By embedding command information (such as clock synchronization signals) within the multi-level signal structure before data transmission begins, the system prepares the receiving end for proper data interpretation without requiring separate command channels
3Measurement precision
If additional reference voltage is provided for multi-level signals, then signal level determination accuracy is improved, but circuit complexity increases
Solution Approach 1:
The multi-level signal structure is designed to be self-referential, where the signal levels themselves provide the reference information needed for accurate determination. By using distinct, well-defined voltage levels that are inherently differentiable, the system eliminates the need for external reference voltage circuits, achieving both high precision and low complexity
Data Source
AI summary
A method for multi-level data transmission includes encoding a data signal to be transmitted into N multi-level signals in accordance with an encoding table, where the data signal is characterized with a stream of binary data segments each of which has a data length of M bits, transmitting simultaneously the N multi-level signals through N data transmission channels, respectively; and decoding the N multi-level signals into the data signal by comparing each two of the N multi-level signals transmitted through the two data transmission channels to obtain a respective bit of the M bits of each binary data segment of the data signal based on comparison between the two corresponding multi-level signals.