External Graphics Subsystem Power and PCIe Activation
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Solution Overview
Problem
Current mobile computing devices face challenges in enhancing graphics capability due to limited space on the motherboard, making it difficult to integrate multiple graphics modules and manage power consumption efficiently.
Innovation Solution
A method and apparatus that detect the presence of an external graphics subsystem, transmit a power enable signal, and activate PCIe signaling channels to enable data communication, allowing for enhanced processing capabilities while maintaining power efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple mobile PCIe modules are integrated on the motherboard, then graphics processing capability is improved, but device complexity and space requirements increase
Solution Approach 1:
The graphics processing system is segmented into multiple independent mobile PCIe modules that can be individually managed and controlled. Each module operates as a separate entity with its own power management, allowing the system to selectively activate only the modules needed for current graphics tasks, thereby improving processing capability without proportionally increasing overall system complexity
Solution Approach 2:
The system implements dynamic power management where mobile PCIe modules can be selectively powered on or off based on real-time graphics processing needs. The controller dynamically adjusts which modules are active, enabling the system to scale graphics processing capability flexibly while maintaining manageable complexity by keeping unused modules in a low-power state
2Productivity
If multiple mobile PCIe modules are integrated on the motherboard, then graphics processing capability is improved, but the available motherboard space is insufficient
Solution Approach 1:
Multiple mobile PCIe modules are arranged in a nested or stacked configuration on the motherboard, where modules are positioned to utilize vertical space and overlapping areas. This nesting approach allows multiple graphics modules to coexist on the limited motherboard area by efficiently packing them in three-dimensional space rather than requiring equal two-dimensional footprint for each module
3Reliability
If mobile PCIe modules are inserted at an angle, then connection stability is improved, but ease of operation deteriorates due to required device shutdown and physical opening
Solution Approach 1:
The mobile PCIe modules are pre-configured with alignment features and guide structures that automatically orient the module at the correct angle during insertion. The connector design includes preliminary alignment mechanisms that guide the module into the proper angular position before final engagement, eliminating the need for manual angle adjustment and reducing installation complexity
Data Source
AI summary
One embodiment of the present invention sets forth a method, which includes the steps of detecting the presence of an external graphics subsystem after the external graphics subsystem is attached to the mobile computing device, transmitting a power enable signal to the external graphics subsystem, and activating PCIe signaling channels after having received a ready signal from the external graphics subsystem to enable data communications between the mobile computing device and the external graphics subsystem.