Display Power Delivery via Switched Paths for Insufficient Input
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Solution Overview
Problem
Display devices often face instability in power supply from external sources, leading to inconsistent driving capabilities due to insufficient power levels from connectors, which can hinder their operation.
Innovation Solution
A display device with a power supply system that generates multiple power levels from an external input power, utilizing a switch arrangement to form different power delivery paths based on the power mode, allowing it to operate stably even when external power is insufficient by switching between power sources and requesting additional power from an external source when needed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the display device uses a connector to receive power from an external source, then the device can operate without an external power supply, but the power level received may be insufficient for stable operation
Solution Approach 1:
The system dynamically switches between different power delivery paths based on power availability. The switch arrangement changes configuration from first mode (using external power supply) to second mode (using external source through interface) depending on whether sufficient power is received, enabling adaptive response to varying power conditions
Solution Approach 2:
The interface acts as an intermediary that can both receive data and deliver power to the display device. When the external source provides insufficient power through the connector, the interface mediates by delivering additional power through an alternative path to ensure stable operation
2Power
If the display device receives power from an external power supply through a connector, then the device can be driven at predetermined power levels, but the power received may be less than required for stable driving
Solution Approach 1:
The power supply system is segmented into multiple independent power delivery paths. The first delivery path delivers power from the external power supply to the display device, while the second delivery path delivers power from the external source through the interface. This segmentation allows the system to utilize either path or both simultaneously based on power requirements
Solution Approach 2:
The system changes the power delivery parameters by switching between different operational modes. In the first mode, power is delivered from the external power supply at predetermined levels. In the second mode, when insufficient power is detected, the system changes parameters to receive and deliver power through the interface, ensuring adequate power levels for stable driving
Data Source
AI summary
A display device includes an interface, a power supply, a switch arrangement, and a display. The interface is driven by driving power and receives image data from an external source. The power supply generates first and second power based on a first input power in a first mode and delivers the driving power to the interface in the first mode. The switch arrangement forms a first delivery path to deliver the first power from the power supply to the interface in the first mode The display receives the second power from the power supply when driven in the first mode and receives the image data from the interface. The switch arrangement forms a second delivery path to deliver second input power to the power supply in a second mode when the interface receives the second input power from the external source in the second mode.