Video Display Power Supply Mode Switching
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Solution Overview
Problem
Video display apparatuses face issues where they stop supplying power when an external device attempts to draw more current than negotiated, leading to disrupted data communications and video output, and increasing power supply capacity results in a larger apparatus volume.
Innovation Solution
A video display apparatus with a power source unit that supplies first and second electric powers, a current detection unit, and an electric power supply control unit that switches between multiple power supply modes and limits power when the detected current reaches a threshold, allowing continuous power supply without increasing the power source capacity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the power source capacity is increased to supply higher current to external devices, then the power supply capability is improved, but the apparatus volume increases
Solution Approach 1:
The patent implements dynamic power supply adjustment by switching between multiple power supply modes (first power supply mode with lower power and second power supply mode with higher power) based on real-time current detection. This allows the apparatus to provide high power capability when needed while maintaining a compact design, as the power source does not need to continuously operate at maximum capacity.
Solution Approach 2:
The patent changes the power supply parameters (voltage and current) by switching between different power supply modes. The control unit detects current values and adjusts the power supply parameters dynamically, enabling the apparatus to adapt its power output to match actual demand without requiring a permanently oversized power source.
2Reliability
If the power supply is stopped to protect the apparatus when current exceeds negotiated values, then the apparatus reliability is improved, but the data communication and video output are disrupted
Solution Approach 1:
The patent implements dynamic power supply mode switching based on real-time current detection. When the detected current reaches a threshold value, the control unit switches from the first power supply mode to the second power supply mode, allowing continued operation without interruption. This dynamic adjustment maintains both apparatus protection and communication continuity.
Solution Approach 2:
The patent employs a feedback mechanism where the control unit continuously detects current values supplied to external devices and adjusts the power supply mode accordingly. This closed-loop control ensures that the apparatus remains protected while maintaining uninterrupted data communication and video output by adapting power supply to actual conditions.
3Adaptability or versatility
If multiple power supply modes are implemented to dynamically adjust power output, then the power supply flexibility is improved, but the control complexity increases
Solution Approach 1:
The patent segments the power supply operation into distinct modes (first power supply mode and second power supply mode) with different power levels. This segmentation simplifies control logic by defining clear boundaries between operating states, making the system easier to manage despite offering multiple power supply options.
Solution Approach 2:
The patent implements a control unit that handles multiple functions: detecting current values, determining whether thresholds are reached, switching between power supply modes, and managing both power supply and data communication. This multi-functional design consolidates control logic into a single unit, reducing overall system complexity while providing adaptable power supply.
Data Source
AI summary
A video display apparatus includes a power source that supplies first electric power and supplies second electric power that is different from the first electric power to an external device, a current detector that detects a current value when the second electric power is supplied to the external device, an electric power supply controller that includes a plurality of electric power supply modes and performs control that supplies electric power corresponding to one electric power supply mode among the plurality of electric power supply modes to the external device as the second electric power, and a controller that performs control that limits the first electric power when the current value detected by the current detector reaches a predetermined first threshold value.