Clock Embedded Interface for Display Timing Control EMI Reduction
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Solution Overview
Problem
Display devices face significant electromagnetic interference (EMI) during high-frequency data transmission between integrated circuits, which affects the reliability and efficiency of data communication.
Innovation Solution
A clock embedded point-to-point interface is used in the timing control circuit to transmit data to multiple data driving circuits at different frequencies, allowing for frequency adjustment and synchronization, thereby reducing EMI and ensuring accurate data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If high work frequencies are used for data transmission between integrate circuits, then data transmission speed is improved, but electromagnetic interference (EMI) becomes more serious
Solution Approach 1:
The patent divides the data transmission into multiple separate channels, with each channel carrying data at a different frequency. This segmentation allows the system to maintain high data transmission speed while distributing the electromagnetic interference across multiple frequency bands, preventing concentrated EMI at any single frequency.
Solution Approach 2:
The patent changes the frequency parameter of data transmission by using multiple different frequencies simultaneously. Each data channel operates at a distinct frequency, which alters the electromagnetic characteristics and reduces the coherence of EMI, thereby mitigating the harmful effects while maintaining overall transmission speed.
2Area of stationary object
If multiple data driving circuits are used to drive different regions of display panel, then display coverage is improved, but complexity of timing control increases
Solution Approach 1:
The patent segments the timing control into separate frequency channels, with each data driving circuit receiving timing signals at its own dedicated frequency. This segmentation simplifies the timing control for each individual circuit while enabling multiple circuits to operate simultaneously across different frequency bands, thereby expanding display coverage without proportionally increasing overall complexity.
Solution Approach 2:
The patent creates a universal timing control mechanism that can serve multiple data driving circuits through frequency multiplexing. The same timing control system can manage multiple circuits by assigning different frequencies to each, making the system multi-functional and reducing the need for separate dedicated timing control for each circuit.
Data Source
AI summary
A display device includes a timing control circuit, a first data driving circuit, and a second data driving circuit. The first data driving circuit receives the first clock embedded training data from the timing control circuit, performs a first clock training to adjust a work frequency of the data driving circuit to be equal to the frequency of a first clock signal, and receives the first clock embedded image data from the timing control circuit. The second data driving circuit receives a second clock embedded training data from the timing control circuit, performs a second clock training to adjust a work frequency of the data driving circuit to be equal to the frequency of a second clock signal, and receives the second clock embedded image data from the timing control circuit. The frequency of the first clock signal is different from that of the second clock signal.