Lamp Device Pin Safety Switch Voltage Control
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Solution Overview
Problem
Conventional tube lamps with two-pin connectors pose a risk of electrical shock during partial insertion or removal from a lighting fixture, as existing protection mechanisms can be tampered with or fail to ensure safe handling.
Innovation Solution
A lamp device with a switch controlled by circuitry that connects and disconnects the pins based on voltage differences between pairs of connection pins, ensuring safe handling by only allowing a closed current path when both pairs are properly inserted, and quickly opening when one pair is disconnected.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a protection switch actuated by an external push button is used, then the lamp device can be protected from electrical shock during insertion and removal, but the protection mechanism can be easily tampered with
Solution Approach 1:
The protection switch is controlled automatically by the lamp device's own circuitry detecting voltage differences between connection pins. The system monitors its own state and actuates the switch without external intervention, making the protection mechanism self-regulating and tamper-resistant.
Solution Approach 2:
The manual mechanical push button system is replaced with an automatic electrical control system. The circuitry detects voltage differences and automatically controls the switch, replacing the mechanical interaction with an electrical sensing and control mechanism that cannot be easily tampered with.
2Productivity
If the switch is closed to enable current flow between pins, then the lamp device can operate normally, but the risk of electrical shock increases during partial insertion
Solution Approach 1:
The switch state is made dynamic rather than fixed. The circuitry continuously monitors voltage differences between connection pins and automatically adjusts the switch state accordingly - closed when safe (both pairs connected), open when unsafe (partial insertion detected), enabling adaptive safety control.
Solution Approach 2:
The circuitry provides feedback by detecting voltage differences between connection pins and automatically adjusting the switch state. The system monitors its own operational state and responds by closing or opening the switch to maintain safety while enabling normal operation when conditions are appropriate.
Data Source
AI summary
According to one embodiment there is provided a lamp device (1) having a lighting module (3) and two pairs of external connection pins (5aa, 5ab, 5ba, 5bb) for connecting the lamp device to a supply voltage of a lighting fixture. A first terminal of the lighting module is connected to a pin of a first pair of pins by a switch which is closed in response to a voltage difference between both the pins of the first pair of pins and the pins of the second pair of pins exceeding a respective threshold voltage. The lamp is therefore safe to handle even in a condition where one pair of pins is connected and the other is not.