Display Timing Controller Buffering for Wire Reduction
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Solution Overview
Problem
Large-sized liquid crystal display devices face challenges in data transfer due to increased data transfer rates and the need for a large number of wires and output pins, with existing solutions either requiring more wires or causing noise interference when using high-speed serial interfaces for video data transfer.
Innovation Solution
The solution involves a display device with a timing controller that supplies control data to specified signal line drivers, which generate and supply scanning line driver control signals, eliminating the need for dedicated control wiring and reducing noise interference by using point-to-point data interfaces and encoding control signals with video data on the same transfer lines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If a common bus is used to transfer video data to multiple data drivers, then the number of wires is reduced, but the data transfer rate becomes excessively large and complex
Solution Approach 1:
The patent divides the video data transfer into multiple segments by introducing intermediate buffer memory units between the timing controller and data drivers. Each buffer receives video data from the timing controller and transfers it to data drivers sequentially, breaking down the complex high-speed transfer into manageable segments with lower individual transfer rates.
Solution Approach 2:
The patent introduces buffer memory units as intermediary components between the timing controller and data drivers. These buffers act as mediators that temporarily store video data and control signals, allowing the timing controller to transfer data at a manageable rate while ensuring each data driver receives its required data at the appropriate timing.
2Productivity
If point-to-point data transfer is used to supply video data to each data driver, then the data transfer rate restriction is alleviated, but the number of wires and output pins increases
Solution Approach 1:
The patent makes the buffer memory units multi-functional by having them perform both video data buffering and control signal generation functions. Each buffer not only stores video data for point-to-point transfer to data drivers but also generates control signals for scanning line drivers, reducing the need for separate control wiring.
Solution Approach 2:
The patent combines multiple functions into the buffer memory units, merging video data storage, control signal generation, and scanning line driver control into single components. This consolidation reduces the overall number of wires and output pins required while maintaining efficient point-to-point data transfer capability.
3Quantity of substance
If control signals are supplied in parallel with video data wires, then the number of wires is reduced, but noise interference occurs in the data transfer lines
Solution Approach 1:
The patent extracts the control signal generation function from the timing controller and relocates it to the buffer memory units. This separation removes control signals from the video data transfer path, eliminating noise interference while maintaining wire efficiency, as control signals are now generated locally at each buffer rather than being transmitted separately alongside video data.
Data Source
AI summary
A liquid crystal display device includes a timing controller, a liquid crystal display panel, multiple data drivers, and gate drivers. The timing controller supplies control data to specified drivers among the data drivers. The specified drivers generate gate driver control signals to control gate drivers in response to the control data, and supply gate driver control signals to the gate drivers.