Lighting device, power supply switching circuit, and power supply switching method of lighting device
A technology for lighting devices and power switching, which is applied in the field of lighting and can solve problems such as unstable operation of lighting devices
Active Publication Date: 2021-04-30
APUTURE IMAGING IND CO LTD
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Problems solved by technology
[0004] When the existing power switching circuit enables the battery to supply power to the light source, there may also be conduction between the power input terminal connected to the mains and the light source, causing the current provided by the battery to flow back from the input terminal of the power supply to the mains. The power input terminal, resulting in unstable operation of the lighting device
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[0051] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Apparently, the described embodiments are only some of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without making creative efforts belong to the scope of protection of this application.
[0052] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " Orientation indicated by rear, left, right, vertical, horizontal, top, bottom, inside, outside, clockwise, counterclockwise, etc. The positional relationship is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the a...
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The invention discloses a lighting device, a power supply switching circuit and a power supply switching method of the lighting device. The power supply switching circuit of the lighting device comprises a plurality of power supply input circuits and a logic control circuit, and the logic control circuit is used for receiving a first electric signal input by an Nth power supply input end, enabling a first switching circuit electrically connected with the Nth power supply input end to be switched on according to the first electric signal, receiving a second electric signal of the power supply input end before the Nth power supply input end, and enabling the first switching circuit electrically connected with the Nth power supply input end to be switched off according to the second electric signal; and the logic control circuit is further used for receiving a third electric signal output by the output end of the first switching circuit electrically connected with the Nth power input end and enabling the first switching circuit electrically connected with the power supply input end before the Nth power supply input end to be disconnected according to the third electric signal, and N is a positive integer and is smaller than or equal to the number of the power supply input circuits. The working stability of the lighting device is improved through the logic control circuit.
Description
technical field [0001] The present application relates to the technical field of lighting, and in particular to a lighting device, a power switching circuit and a power switching method of the lighting device. Background technique [0002] In the prior art, the light source of the lighting device is generally powered by a variety of power sources such as commercial power and batteries. When one of the power sources is cut off, the power switching circuit switches the light source to be powered by other power sources, thereby ensuring the safety of the lighting device. work steadily. [0003] In order to reduce the electricity cost of the lighting device and improve the service life of the lighting device, the power switching circuit generally uses the mains power to supply power to the light source. When the mains power is cut off, the power switching circuit switches to the battery or other power sources for power supply. [0004] When the existing power switching circuit ...
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IPC IPC(8): H02J9/02H02J9/06
CPCH02J9/02H02J9/061H05B47/17H05B47/105H02J1/10H02J1/102
Inventor 黄毅周向军
Owner APUTURE IMAGING IND CO LTD