Display Power Interface Switching for Source and Sink Charging
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Solution Overview
Problem
Image display apparatuses are limited to a sink mode operation, preventing the supply of DC voltage to external battery devices or mobile terminals, and cannot efficiently charge internal batteries in a sink mode.
Innovation Solution
The image display apparatus includes a power controller that switches between source and sink modes, allowing DC voltage to be supplied to external devices or mobile terminals and charges the internal battery by controlling the interface and power circuit device to manage DC voltage input and output.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the interface operates only in sink mode to receive DC voltage, then the internal battery can be charged easily through the interface, but the apparatus cannot supply DC voltage to external battery devices or mobile terminals
Solution Approach 1:
The interface dynamically switches between sink mode and source mode based on operational requirements. The power controller determines the appropriate mode and configures the interface accordingly, allowing the same interface to perform both power reception and power supply functions without requiring separate dedicated interfaces.
Solution Approach 2:
The interface is designed to perform multiple functions: it can operate as a sink to receive DC voltage for charging the internal battery, and as a source to supply DC voltage to external battery devices or mobile terminals. This multi-functional design eliminates the need for separate dedicated interfaces for charging and power supply.
2Productivity
If the interface operates in sink mode to charge the internal battery, then charging is efficient and simple, but the apparatus cannot simultaneously supply power to external devices through the same interface
Solution Approach 1:
The system dynamically switches between sink mode and source mode based on operational requirements. The power controller determines the appropriate mode and configures the interface accordingly, allowing the same interface to perform both power reception and power supply functions without requiring separate dedicated interfaces.
3Adaptability or versatility
If a separate interface is added to enable source mode operation, then power supply to external devices is enabled, but the device complexity increases
Solution Approach 1:
The interface is designed to perform multiple functions: it can operate as a sink to receive DC voltage for charging the internal battery, and as a source to supply DC voltage to external battery devices or mobile terminals. This multi-functional design eliminates the need for separate dedicated interfaces for charging and power supply.
Solution Approach 2:
The patent combines the sink mode interface and source mode interface into a single unified interface. The power controller manages the interface configuration to perform both power reception and power supply functions, reducing the total number of interfaces and simplifying the overall device structure.
Data Source
AI summary
An image display apparatus according to an embodiment of the present disclosure comprises: a display; an interface electrically connected to an external battery device or a mobile terminal; a power controller to control a source mode or a sink mode of the interface; an internal battery; and a power circuit device including a DC voltage input terminal, and the power controller is configured to receive first DC voltage through the interface in the case in which DC voltage is not supplied in the sink mode, and supply third DC voltage based on the source mode in the case in which second DC voltage is supplied through the DC voltage input terminal. Accordingly, it is possible to perform a source mode operation for supplying the DC voltage to the external battery device or the mobile terminal.