Unified Pin Set for Multi-Mode Display Interface
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Solution Overview
Problem
Information handling systems, such as mobile devices, face challenges in efficiently supporting multiple display standards like MIPI DSI and eDP, requiring separate pin sets and signaling methods, which complicates display interface connectivity and resolution management.
Innovation Solution
A System on a Chip (SoC) with a unified pin set and adaptive signaling capabilities allows for seamless operation across different display standards by determining the present display interface and selecting the appropriate operational mode, utilizing AC or DC coupled signaling and lane mapping to support various resolutions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If separate pin sets are used for different display standards (eDP, MIPI DSI), then each display standard can be supported with dedicated signaling, but the device complexity and hardware requirements increase
Solution Approach 1:
The patent implements a unified pin set that can operate in multiple display interface modes (eDP and MIPI DSI). The same physical pins are configured differently through software control to support different display standards, eliminating the need for separate dedicated pin sets for each standard while maintaining full compatibility with both eDP and MIPI DSI protocols
Solution Approach 2:
The system dynamically switches between different signaling modes (AC-coupled for eDP, DC-coupled for MIPI DSI) based on the detected display standard. The pin configuration and signaling characteristics are adaptively changed at runtime to match the required display interface, allowing a single static pin set to serve multiple dynamic functions
2Reliability
If separate pin sets are allocated for eDP and MIPI DSI interfaces, then each interface can operate independently, but the SoC package size and hardware resources increase
Solution Approach 1:
The patent merges the previously separate eDP and MIPI DSI pin sets into a single unified pin configuration. By combining these interfaces and using software to distinguish and control the appropriate signaling mode, the hardware resource requirement is reduced while maintaining independent operational capability for each display standard through mode-specific configuration
3Ease of operation
If dedicated pins are provided for each display standard, then display interface connectivity is simplified for each standard, but the overall system integration becomes more complex
Solution Approach 1:
The system employs dynamic mode detection and switching mechanisms that automatically identify the connected display standard and configure the unified pin set accordingly. This dynamic adaptation simplifies the user experience and system integration, as the same physical interface can seamlessly switch between eDP and MIPI DSI modes without requiring separate dedicated connections for each standard
Data Source
AI summary
An information handling system includes a display panel, a panel connector, and a source device. The display panel displays images at different resolutions. The enables display data signals to be sent to the display panel. The source device determines whether an auxiliary channel is present between the source device and the panel connector, operates in a first embedded display operation mode if the auxiliary channel is present, otherwise determines if an enable signal has been received, and operates in a second embedded display operation mode when the enable signal has been received. The source device also communicates the display data signals to the display panel through the panel connector via a same set of pins of the source device during both the first embedded display operation mode and the second embedded display operation mode.