Display Power Circuit Isolating Data and Voltage Channels
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Solution Overview
Problem
Current power supply methods for display devices via data ports, such as USB, DP, and HDMI, are inadequate, leading to unstable operation or failure in displaying audio/video content, and require additional commercial power sources, which restricts device positioning and availability.
Innovation Solution
A circuit and method that isolate the power supply from data transmission ports, using a DC-DC converter to provide a direct voltage to display devices, allowing for flexible power management and integration of power and data modules without the need for AC-DC converters, thereby eliminating energy loss and cable constraints.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If power is supplied via data ports (USB, DP, HDMI), then data transmission and power supply are integrated, but the power supply is insufficient and operation becomes unstable
Solution Approach 1:
The patent separates power transmission and data transmission into independent channels. The power supply module includes dedicated power transmission lines that are electrically isolated from data transmission lines, allowing each to operate independently without interference. This segmentation resolves the contradiction by maintaining integration benefits while ensuring reliable power delivery through dedicated pathways.
Solution Approach 2:
The patent introduces an isolation component as an intermediary between the power supply module and display module. This isolation component electrically separates the two modules while maintaining functional connection, preventing data interference with power signals and ensuring stable operation. The intermediary resolves the contradiction by enabling integrated design while protecting against signal interference.
2Power
If commercial power source is used for display device, then sufficient power is provided, but device positioning is restricted by power supply wire and socket availability
Solution Approach 1:
The patent merges power transmission with data transmission by integrating the power supply module into the existing data connection interface. The power transmission lines are combined with data transmission lines in a unified connector, eliminating the need for separate power cables and sockets. This merging resolves the contradiction by providing sufficient power capacity while maintaining positioning flexibility through the existing data connection.
Solution Approach 2:
The patent makes the data connection interface multi-functional by enabling it to simultaneously transmit both data and power. The connector is designed to handle multiple functions: data signal transmission, power delivery, and ground reference. This universality resolves the contradiction by eliminating the need for dedicated power infrastructure while providing adequate power supply capacity.
3Adaptability or versatility
If AC-DC converter is included in display device, then commercial power can be converted, but device complexity and thickness increase
Solution Approach 1:
The patent extracts the AC-DC conversion function from the display device and relocates it to the data source device. The power supply module in the data source device performs AC-DC conversion before transmitting power through the data connection. This extraction resolves the contradiction by maintaining power source compatibility while reducing display device complexity and thickness by removing the AC-DC converter.
Solution Approach 2:
The patent inverts the traditional power conversion architecture by performing AC-DC conversion at the power source end rather than at the load end. Instead of converting AC to DC in the display device, the conversion is performed in the data source device, and the converted DC power is transmitted through the data connection. This inversion resolves the contradiction by maintaining versatility while simplifying the display device structure.
4Reliability
If separate power cable and data cable are used, then power and data are transmitted independently, but cable management becomes complex and positioning is restricted
Solution Approach 1:
The patent merges separate power transmission and data transmission into a single integrated connection. The power supply module and data transmission module share a common connector with both power lines and data lines connected to the same physical interface. This merging resolves the contradiction by simplifying cable management to a single cable while maintaining independent transmission channels through electrical isolation.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables stable operation of display devices without commercial power, reduces carbon emissions, and provides design flexibility by eliminating the need for separate power cables and AC-DC converters, allowing for thinner and more versatile device designs.
Implementation Method 1
at least one output node, configured to operatively provide the display device with at least one output voltage generated based on the first direct voltage
Data Source
AI summary
An embodiment is a circuit for use with a display device, the circuit including: a first input node configured to be operatively coupled to a first port of a data source device that provides the display device with data, to receive a first direct voltage used for a real-time display of the data on the display device; and at least one output node, configured to operatively provide the display device with at least one output voltage generated based on the first direct voltage, wherein the first port is isolated from a data port used to transmit the data.