Safety switch circuit
A safety switch and circuit technology, which is applied in the direction of circuit layout, lamp circuit layout, electric light source, etc., can solve problems such as difficulty in ensuring that the power line has no electricity, safety issues, etc.
Inactive Publication Date: 2016-08-17
COOLER MASTER (HUIZHOU) CO LTD
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Problems solved by technology
This poses a great challenge to the designer of the lamp
Even if the power is turned off, it is still difficult to ensure that the current power line is not powered, and it may cause potential safety problems
Method used
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[0041] [Example of light-emitting diode lamp tube and safety switch circuit suitable for light-emitting diode lamp tube]
[0042] The light-emitting diode lamp tube in this embodiment can replace the traditional fluorescent lamp tube, which is connected to the lamp socket like the traditional fluorescent lamp tube, and uses an external power source to emit light. Those skilled in the art can easily understand that a traditional light emitting diode tube has a first side end and a second side end, and the first side end and the second side end each have two pins. The light-emitting diode lamp in this embodiment also has a first side end and a second side end, the first side end has a first lead a1 and a second lead a2, and the second side end has a third lead pin b1 and the fourth pin b2. The application mode of the light emitting diode lamp tube in this embodiment connected to the power supply of the lamp holder will be described later Figure 11 to Figure 13 Examples are de...
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The invention discloses a safety switch circuit. The safety switch circuit comprises a switch unit, a full bridge conversion unit, a trigger circuit and a starting capacitor, wherein the switch unit is provided with a first switch end, a second switch end and a trigger end; the full bridge conversion unit is provided with a first power supply end, a second power supply end, a first output end and a second output end, wherein the first output end and the second output end are electrically connected with the second switch end and the first switch end of the switch end respectively; the first power supply end is electrically connected with the input / output end; the trigger circuit is electrically connected to the end part, on the lamp tube side, of the safety switch circuit, and the switch unit; the trigger circuit outputs a trigger voltage to the trigger end of the switch unit so as to determine whether to conduct the switch unit or not according to the voltage value of the trigger voltage; the starting capacitor is provided with a first capacitor end and a second capacitor end which are electrically connected to the second power supply end of the full bridge conversion unit and the trigger unit; and the trigger circuit determines the voltage value of the trigger voltage according to the voltage value of the starting capacitor.
Description
technical field [0001] The invention relates to a safety switch circuit, in particular to a safety switch circuit suitable for light-emitting diode lamp tubes. Background technique [0002] Double-ended lamps are subject to regulatory safety restrictions for installation. Traditional lamps are usually double-ended power supply, and the concept of single-ended power supply has only been introduced in recent years. In the case that the original lamps have not been eliminated, it is necessary to use the corresponding double-ended energized lamp tube or single-ended energized lamp tube according to the design of the lamp. When the lamp is installed, according to the requirements of the installation program, when only one end is connected to the lamp holder (powered on), the other end that has not been connected to the lamp holder should not have the problem of leakage, so as to prevent the personnel who install or disassemble the lamp from electric shock. This regulation is su...
Claims
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IPC IPC(8): H05B37/02H05B44/00
CPCF21V23/06H05B47/10Y02B20/30
Inventor 黄闿运
Owner COOLER MASTER (HUIZHOU) CO LTD