Analog Video Transport for Integrated Display Panel Source Drivers
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Solution Overview
Problem
Existing display technologies face performance-scaling bottlenecks due to digital video transport, which requires high-speed digital circuits and D-to-A conversion, leading to increased cost, power consumption, and complexity, especially as display resolutions increase.
Innovation Solution
The use of sampled analog video transport (SAVT) technique eliminates the need for D-to-A conversion by transmitting video signals as analog signals directly from a display controller to source drivers, reducing complexity and bandwidth requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If digital video transport is used to achieve high display resolution, then display quality is improved, but bandwidth requirements and system complexity increase exponentially
Solution Approach 1:
The patent replaces the digital signal transmission system with an analog signal transmission system. Instead of using digital circuits and D-to-A converters, the invention directly transmits analog video signals from the display controller to the source drivers, eliminating the need for complex digital infrastructure while maintaining display quality.
Solution Approach 2:
The patent changes the fundamental parameter of signal representation from digital to analog. This parameter change allows the system to achieve high display resolution without the exponential increase in bandwidth and complexity associated with digital transmission, as analog signals can represent pixel data more efficiently.
2Measurement precision
If digital video transport is used to achieve high display resolution, then display quality is improved, but power consumption increases
Solution Approach 1:
The patent replaces the power-intensive digital transmission system with a more efficient analog system. By eliminating D-to-A converters and digital circuitry from the signal path, the invention significantly reduces the power consumption required for high-resolution display operation.
3Measurement precision
If digital video transport is used to achieve high display resolution, then display quality is improved, but production cost increases
Solution Approach 1:
The patent replaces expensive digital components including D-to-A converters, high-speed digital circuits, and complex synchronization mechanisms with simpler analog circuitry. This substitution directly reduces component costs and assembly complexity, making high-resolution displays more cost-effective to manufacture.
4Speed
If D-to-A conversion is performed at high speed, then display refresh rate is improved, but conversion stability deteriorates
Solution Approach 1:
The patent eliminates the D-to-A conversion process entirely by using direct analog signal transmission. This removes the source of conversion instability while maintaining the ability to achieve high display refresh rates through efficient analog signal delivery from the controller to the source drivers.
Data Source
AI summary
A transmitter includes a distributor that receives a stream of digital video samples and distributes the digital video samples into vectors in a buffer per a permutation. A digital-to-analog converter (DAC) per vector receives from its corresponding vector the digital video samples and converts the digital video samples into analog video samples. A wiring harness transports each series of analog video samples to a source driver of a display panel of a display unit. Each source driver includes a collector that receives analog video samples from each DAC and stores the analog video samples of the corresponding vector, and amplifiers that receive the stored analog video samples in parallel from the collector and amplifies the stored analog video samples onto a column of the display panel. Synchronization uses modified MFM and sample phase alignment. The source drivers are integrated with the substrate of the display panel using transistors.