Display Device Bidirectional Communication Line Segmentation
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Solution Overview
Problem
Conventional display devices face impedance mismatching and precise timing alignment issues due to shared bus lines between source drivers, which complicates bidirectional communication and accurate transmission of correction data in high-speed data signal transmission.
Innovation Solution
The implementation of a display device with first and second transmission lines for bidirectional communication between a timing controller and source drivers, using CEDS protocol-based Tx signals, where the timing controller transmits and receives correction data during specific operation periods, allowing for synchronized data transmission and reception without exclusive bus line occupation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If multiple source drivers share a pair of bus lines for bidirectional communication, then the device complexity is reduced, but impedance mismatching occurs and precise timing alignment becomes difficult
Solution Approach 1:
The patent divides the communication function into separate unidirectional channels: a first transmission line for timing controller to source driver communication and a second transmission line for source driver to timing controller communication. This segmentation eliminates impedance mismatching by avoiding multiple drivers sharing the same bidirectional lines, while maintaining relatively simple device structure.
2Loss of information
If one source driver exclusively occupies the bus lines for transmission, then signal interference is reduced, but the plurality of source drivers need to sequentially transmit data requiring precise timing alignment
Solution Approach 1:
The patent segments the communication pathway into dedicated unidirectional channels, allowing multiple source drivers to transmit correction data simultaneously through the second transmission line to the timing controller without requiring sequential access or precise timing alignment. This eliminates the timing conflict inherent in shared bidirectional lines.
Solution Approach 2:
The second transmission line serves as a universal output channel for all source drivers to send correction data to the timing controller simultaneously, eliminating the need for exclusive occupation and sequential transmission while maintaining data transmission accuracy.
3Ease of operation
If bidirectional communication is implemented using shared bus lines, then the ease of operation is improved, but impedance mismatching and timing alignment issues complicate the system
Solution Approach 1:
By segmenting bidirectional communication into separate unidirectional transmission lines, the patent simplifies the communication setup while eliminating the need for complex timing control mechanisms. Each transmission line has a dedicated direction, reducing the complexity of coordination and impedance matching.
Data Source
AI summary
Disclosed is a display device. The display device may use one transmission line to perform bidirectional data transmission between a timing controller and a source driver. Furthermore, the display device may control the timing controller to transmit a Tx signal to the source driver and control the source driver to transmit correction data, through one transmission line.