LCD Source Driver Data Transmission Segmentation
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Solution Overview
Problem
Large LCD devices generate significant electromagnetic interference (EMI) due to high power consumption, which exceeds international standards, necessitating a reduction in current and conducting wire length to minimize EMI levels.
Innovation Solution
The implementation of a data transmission device and source driver with a data transmission controller that controls data storage units and switching units to manage data transmission efficiently, reducing current consumption by selectively activating data transmission sections and using clock signals to determine storage and transmission operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If data is transmitted line by line over a short time period to increase productivity, then the transmission speed is improved, but the current consumption increases leading to higher EMI levels
Solution Approach 1:
The data transmission line is divided into multiple sections, with data storage units distributed at different positions along the line. This segmentation allows data to be stored locally at multiple points rather than transmitted entirely through a single long path, reducing the effective current consumption and EMI while maintaining high transmission speed
2Object-generated harmful factors
If the conducting wire length is reduced to decrease EMI levels, then the EMI is reduced, but the data transmission capacity is limited
Solution Approach 1:
Instead of increasing wire length in one dimension, the patent uses multiple data storage units positioned at different locations along the transmission line. This spatial distribution across multiple dimensions allows the system to handle larger data transmission capacity while keeping individual wire segments short, thus reducing EMI
3Use of energy by moving object
If data storage units are distributed along the transmission line to reduce current consumption, then the current consumption is reduced, but the device complexity increases
Solution Approach 1:
Each data storage unit is designed to perform multiple functions: storing data, determining whether to store incoming data, and participating in the sequential storage process. This multi-functionality reduces the need for additional separate control mechanisms, thereby limiting the increase in device complexity while achieving reduced current consumption
Data Source
AI summary
A data transmission device for reducing power consumption includes a data source configured to provide data, a data transmission line having a plurality of data transmission sections, and data storage units respectively coupled to the data transmission sections. The respective data storage units determine whether the data storage units store the provided data, and store the provided data based on the determination result. The provided data is sequentially stored into the data storage units, from one end of the data storage units to the other end of the data storage units. A data transmission controller is configured to control the data transmission sections and to transmit the provided data to one of the data storage units. Therefore, the data transmission device may reduce electromagnetic interference (EMI) that is proportional to the current in the source driver.