Dynamic HDMI Power Redistribution via SCDC Registers
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Solution Overview
Problem
Existing high-speed wired interfaces like USB and Mobile High-Definition Link have fixed power supply capabilities per port, limiting the distribution of remaining power from inactive ports to active ports, leading to inefficient power supply and prolonged charging times for consumer devices.
Innovation Solution
A method and device using an HDMI cable to detect connection releases and insufficient power in consumer devices, allowing for dynamic power redistribution from inactive ports to active ports, enabling real-time adjustment of power levels through SCDC registers and message negotiation between power provider and consumer devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If fixed power supply per port is used, then device complexity is reduced, but power supply efficiency deteriorates
Solution Approach 1:
The patent implements dynamic power allocation where the power provider device continuously monitors power consumption of connected devices and adjusts power distribution in real-time. The controller receives power consumption information from each port and dynamically reallocates power resources, transforming the static fixed-power model into a dynamic adaptive system that optimizes power supply efficiency without requiring complex manual configuration.
Solution Approach 2:
The system establishes a feedback loop where power consumption information is continuously transmitted from consumer devices to the power provider device. The controller processes this feedback data and automatically adjusts power allocation accordingly. This closed-loop feedback mechanism enables efficient power management while maintaining relatively simple device architecture, as the system self-regulates based on actual power needs.
2Ease of operation
If fixed power supply per port is used, then ease of operation is improved, but charging time increases
Solution Approach 1:
The power provider device automatically performs power allocation and adjustment without requiring user intervention. The controller autonomously monitors power consumption, detects insufficient power conditions, and reallocates power from under-utilized ports to ports with higher demand. This self-service capability maintains operational simplicity while significantly reducing charging time by dynamically optimizing power distribution based on actual device needs.
Solution Approach 2:
The system proactively detects power insufficiency conditions and preemptively reallocates power before charging is completed. By continuously monitoring power consumption and anticipating power needs, the system performs preliminary power adjustment actions that prevent charging delays, thereby reducing overall charging time while maintaining ease of operation through automated processes.
3Productivity
If power redistribution from inactive ports to active ports is enabled, then power supply efficiency is improved, but device complexity increases
Solution Approach 1:
The patent merges the power management functions of multiple ports into a centralized control system. The controller consolidates power consumption information from all ports and performs unified power allocation decisions. This merging approach enables efficient power redistribution across ports while avoiding the complexity of implementing independent power management logic in each port, as the centralized controller handles all power distribution decisions.
Solution Approach 2:
The controller is designed with multi-functionality, handling both power monitoring and power allocation tasks. By making the controller universal—capable of performing multiple functions including receiving power consumption data, detecting insufficient power conditions, and executing power reallocation—the system achieves efficient power redistribution without adding separate dedicated components for each function, thereby limiting the increase in device complexity.
Data Source
AI summary
A method for supplying power performed by a power provider device including a plurality of ports according to an embodiment of the present invention may include providing power to a plurality of power consumer devices through the plurality of ports which is connected to the plurality of power consumer devices through an HDMI cable; detecting a connection release between a first power consumer device among the plurality of power consumer devices and a port; detecting a second power consumer device which is provided with insufficient power currently among the plurality of power consumer devices; notifying remaining supply power levels that are available to additionally supply to the second power consumer device; receiving a request of a power level that the second power consumer device is to receive among the remaining supply power levels; and supplying the power additionally to the second power consumer device as much as the requested power level.