Power Supply Cable Detect Lines for Open Circuit Safety
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Solution Overview
Problem
Power supply devices for display devices often pose safety risks due to exposed conductive lines when cables are cut or connectors are not fully inserted, leading to potential electric shock and fire hazards, and their design can interfere with user concentration.
Innovation Solution
A power supply device with a cable that includes detect lines to verify power-on signals and feedback signals, which turns off the main power supply when the cable is opened, preventing electric shock and ensuring safety by blocking power transmission and discharging stored energy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the cable is made with transparent film for aesthetic design, then visual interference is reduced, but the conductive line becomes easily exposed when cut creating safety hazards
Solution Approach 1:
The patent applies preliminary action by detecting the cable connection state before main power is supplied. The detection unit checks whether the cable is properly connected through detect lines, and only after successful detection does the control unit enable main power transmission. This prevents electric shock hazards before they can occur by ensuring cable integrity is verified in advance.
Solution Approach 2:
The patent implements feedback through detect lines that continuously monitor the cable connection state and transmit this information back to the control unit. The control unit adjusts power supply based on this feedback - blocking main power when cable disconnection is detected and enabling it when properly connected. This closed-loop feedback system maintains safety while allowing aesthetic transparent cable design.
2Ease of operation
If the cable connector is not completely inserted, then ease of connection is improved, but heat generation in the contact area causes fire hazards
Solution Approach 1:
The patent applies preliminary action by performing connection state detection before main power is transmitted. The detection unit uses detect lines to verify that connectors are fully and properly inserted into the cable. Only after successful detection does the control unit enable main power flow. This preliminary verification prevents fire hazards by ensuring proper connection before high current flows, while still maintaining ease of connection operation.
Solution Approach 2:
The patent introduces an intermediary detection mechanism between the cable connector and main power transmission. The detect lines act as intermediaries that sense the connection state and relay this information to the control unit, which then mediates the power flow decision. This intermediary system prevents direct power transmission through improperly connected connectors, eliminating fire hazards while preserving user convenience.
3Reliability
If detect lines are added to verify power-on signals, then safety is improved, but device complexity increases
Solution Approach 1:
The patent applies merging by combining the detection function with existing cable structures. The detect lines are integrated into the cable assembly, sharing physical space and functional pathways with power transmission lines. The detection unit and control unit are merged into the power supply device's existing architecture. This merging approach enables safety detection functionality while minimizing the increase in overall device complexity.
Solution Approach 2:
The patent implements universality by designing the detect lines to serve multiple functions within the cable system. The same detect line infrastructure is used for both connection state detection and power-on signal verification. The control unit uses feedback from these detect lines for multiple safety decisions including main power transmission control and standby power management. This multi-functional approach enables comprehensive safety detection without proportionally increasing device complexity.
Data Source
AI summary
A power supply device according to an embodiment of the disclosure includes a power supply unit including a first power supply unit transmitting standby power to an electronic device and a second power supply unit transmitting main power to the electronic device and a cable including a standby power transmission line transmitting the standby power to the electronic device, a main power transmission line transmitting the main power to the electronic device, a first detect line receiving a power-on signal for operating the second power supply unit from the electronic device, and a second detect line determining whether the power-on signal is received. The second power supply unit does not operate when at least one of the first detect line and the second detect line is opened and the power-on signal is not received. Moreover, various embodiment grasped through the disclosure are possible.