Circuit for detecting service life of lamp tube, and lamp
A technology for detecting the life of circuits and lamp tubes, which is applied in the lighting field and can solve problems such as low lighting efficiency
Active Publication Date: 2018-09-28
FUJIAN RAYNEN TECH
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Problems solved by technology
[0004] The main technical problem to be solved by this application is to provide a detection circuit for the life of the electric lamp tube and the electric lamp, which can avoid problems such as low lighting efficiency when the life of the electric lamp ends.
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[0015] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0016] see Figure 1-4 as well as Figure 7 , an embodiment of the detection circuit for the lamp tube life of the present application, wherein the lamp includes an electronic ballast 12 and a lamp tube 11 , and the electronic ballast 12 includes a bridge inverter circuit 121 and a filter circuit 122 . The bridge inverter circuit 121 is used to transform the received DC voltage into AC voltage. The filter circuit 122 includes a first filter capacitor Cp, a s...
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Embodiments of the invention provide a circuit for detecting the service life of a lamp tube, and a lamp. The lamp includes an electronic ballast and a lamp tube, and the electronic ballast includes abridge inverter circuit and a filter circuit. The bridge inverter circuit is used for converting a received DC voltage into an AC voltage. The filter circuit includes a first filter capacitor, a second filter capacitor and a filter inductor, wherein the first filter capacitor, the second filter capacitor and the filter inductor are connected in series, and the lamp tube is connected in parallel with the first filter capacitor. The filter circuit filters the AC voltage and supplies the filtered AC voltage to the lamp tube for operation. The first input end of the circuit is coupled between thefirst filter capacitor and the second filter capacitor, and the second input end is grounded and is used for measuring the average voltage value of the first input end, and outputting a detection voltage through the output end, wherein the detection voltage d is used for detecting whether the lamp tube has a rectifying effect or not. Through the above mode, the circuit can effectively detect rectifying effect happening when the service life of the lamp tube is finished, and timely reminds a user of replacing the lamp tube.
Description
technical field [0001] The invention relates to the field of lighting, in particular to a detection circuit for the service life of an electric lamp tube and an electric lamp. Background technique [0002] The lamp tubes of some electric lamps, such as gas discharge lamps, have been widely used in the lighting field because of their high luminous efficacy and long life. Due to the negative impedance characteristics of gas discharge lamps, ballasts are required to cooperate with them and provide appropriate limited voltage and current. The light efficacy of gas discharge lamps will decrease at the end of their life, which will affect their normal lighting work, and the ballast will also work in an abnormal state, especially in some such as plant lighting, the decrease in light efficiency will affect the growth of plants. [0003] Therefore, it is necessary to effectively know the service life of the lamp tube and detect the end of service life of the lamp tube in time. Con...
Claims
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CPCG01R31/245
Inventor 陈云辉徐志望叶跃明林永生
Owner FUJIAN RAYNEN TECH