Bidirectional Timing Controller Source Drive IC Data Transmission
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Solution Overview
Problem
The existing display devices require additional data transmission lines for bi-directional communication between the source drive IC and the timing controller, leading to increased noise, power consumption, and larger non-display regions.
Innovation Solution
A display device configuration where the timing controller and source drive IC exchange data bi-directionally using a pair of data transmission lines, eliminating the need for additional lines and optimizing data transmission protocols.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If additional data transmission lines are provided for bi-directional communication between source drive IC and timing controller, then data exchange capability is improved, but noise increases
Solution Approach 1:
The patent combines bidirectional data transmission and sensing functions into a single data transmission line. The same line that transmits video data from the timing controller to the source drive IC also carries sensing data from the source drive IC back to the timing controller, eliminating the need for separate sensing lines and reducing overall line count and noise.
Solution Approach 2:
The data transmission line serves multiple functions: it transmits video data from the timing controller to the source drive IC, and simultaneously transmits sensing data from the source drive IC to the timing controller. This multi-functional use of the same transmission medium reduces the total number of lines required.
2Adaptability or versatility
If additional data transmission lines are provided for bi-directional communication, then data exchange capability is improved, but power consumption increases
Solution Approach 1:
The patent merges bidirectional communication functionality into a single transmission line, reducing the total number of active electrical connections. Fewer transmission lines mean lower overall power consumption for data transmission while maintaining full bidirectional communication capability.
3Adaptability or versatility
If additional data transmission lines are provided for bi-directional communication, then data exchange capability is improved, but non-display region size increases
Solution Approach 1:
The patent combines sensing line functionality with the existing data transmission line, eliminating the need for separate sensing lines. This reduces the number of connections required at the display panel edges, thereby reducing the size of the non-display region.
4Loss of energy
If bidirectional communication is implemented using existing data transmission lines, then noise and power consumption are reduced, but communication protocol complexity increases
Solution Approach 1:
The patent employs time-division multiplexing where the data transmission line alternates between transmitting video data from the timing controller to the source drive IC and transmitting sensing data from the source drive IC to the timing controller. This periodic switching of transmission directions enables bidirectional communication over a single line with manageable protocol complexity.
Data Source
AI summary
A display device includes a display panel including data lines, scan lines, and pixels connecting with the data lines and the scan lines, a scan driver configured to supply scan signals to the scan lines, a source drive integrated circuit (“IC”) configured to convert digital video data into data voltages and to supply the data voltages to the data lines, and a timing controller configured to transmit the digital video data to the source drive IC and to control driving timing of the scan driver and the source drive IC, in which a transmitter and a receiver of the source drive IC are connected via a pair of transmission lines to a transmitter and a receiver of the timing controller.