Daisy-Chain Video Display Interface Using VESA-DP
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional video display systems face limitations in supporting multiple high-definition monitors due to the scarcity of video output ports on devices like laptops, which restricts the ability to display multiple high-resolution images simultaneously without incurring excessive costs for additional circuitry and connectors.
Innovation Solution
A digital display monitor equipped with two VESA-DP connectors that can receive and relay serial video lane signals in a daisy-chain configuration, utilizing a dynamically programmable transceiver circuit to route and relay video signals to multiple monitors, allowing for extended display capabilities without the need for additional ports.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple high-definition monitors are supported through additional video output ports, then the display capability is improved, but the device complexity and cost increase
Solution Approach 1:
The display monitor is designed to function as both a sink device (receiving video signals) and a relay device (forwarding signals to other monitors). The single VESA-DP connector supports multiple functions: local display, daisy-chain relay to additional monitors, and configuration as either source or sink in the chain. This multi-functionality eliminates the need for multiple dedicated video output ports on the host device.
Solution Approach 2:
The display monitor acts as an intermediary between the host device and additional monitors in the daisy-chain configuration. It receives video signals from the host, processes them locally for display, and relays remaining signals to subsequent monitors. This intermediary role allows the host device to maintain simple architecture while supporting multiple displays.
2Adaptability or versatility
If additional video output ports are added to support multiple monitors, then the display capability is improved, but the manufacturing cost increases
Solution Approach 1:
The monitor's single VESA-DP connector is designed to perform multiple functions including local display output, daisy-chain signal relay, and operation in various roles (source, sink, relay) within the chain. This multi-functionality eliminates the need for multiple physical connectors, reducing component count and manufacturing complexity.
Solution Approach 2:
Instead of adding physical connectors to the host device, the invention uses software/firmware configuration to enable the single connector to replicate multiple display output capabilities. The system copies the function of additional connectors through virtual configuration rather than physical duplication.
3Adaptability or versatility
If a daisy-chain configuration is implemented, then the number of supported monitors is improved, but the signal transmission complexity increases
Solution Approach 1:
The video signal transmission is segmented into discrete lanes (up to 4 lanes) that can be independently managed and relayed through each monitor in the chain. Each monitor processes specific lanes and forwards them along the daisy-chain, breaking down the complex multi-monitor signal distribution into manageable segments handled by individual devices.
Solution Approach 2:
The daisy-chain configuration maintains continuous video signal transmission through each monitor in sequence. Each monitor receives signals from the previous device, displays them locally, and relays them to the next device without interruption. This continuous relay mechanism simplifies the overall architecture compared to requiring separate independent connections to each monitor.
Data Source
AI summary
A serial display interface such as the VESA-Display Port interface is expanded to support daisy chained coupling of one display monitor to the next. Each daisy chain wise connectable display monitor (except optionally the most downstream one on the daisy chain) has a local daisy chain transceiver device associated with it where the local transceiver device routes a selectable one or more video data streams to the local monitor and the local transceiver device relays on to more downstream devices of the daisy chain other video data streams. In one embodiment, the daisy chain wise connectable display monitors are hot-pluggable and unpluggable.