A high-efficiency dual-purpose desk lamp

Abstract

The invention provides an efficient dual-use table lamp which comprises a table lamp base, a switch power supply, a lamp holder and a lampshade. The switch power supply comprises a resonant converter provided with a centre-tapped transformer, a tablet support is arranged on the table lamp base, and concave grooves are respectively arranged in two ends where the tablet support is in contact with the table lamp base. The switch power supply with the resonant converter provided with the centre-tapped transformer is arranged, so that loss is low, power density is high, operating life of the table lamp can be prolonged, reliability of the table lamp cam be improved, and a tablet computer can be fixed on the lamphoder of the lamp table.

Description

technical field [0001] The invention belongs to the field of lighting tools, in particular to a high-efficiency dual-purpose desk lamp. Background technique [0002] Desk lamps have become a necessity for people's life and study, especially for students who need to study at home or study in the school study room. [0003] At present, traditional desk lamps often use switching power supplies to switch on and off while satisfying the functions of lighting tools. The working process of switching power supplies used in traditional desk lamps is through "chopping", that is, chopping the input DC voltage into amplitudes equal to The pulse voltage of the input voltage amplitude is realized. The duty cycle of the pulse is adjusted by the controller of the switching power supply; once the input voltage is chopped into an AC square wave, its amplitude can be increased or decreased by the transformer, and the output can be increased by increasing the number of secondary windings of th...

AI Technical Summary

Problems solved by technology

[0004] However, the desk lamp using the switching power supply used in the above desk lamp has switching loss, an impulse voltage generated when the switching element is disconnected, and poor stability of the desk lamp caused by voltage instability, high loss, low power density, and long working life. The problem of low reliability; and the traditional desk lamp that only plays the role of lighting tool, and the traditional desk lamp has a single function. While the base occupies the desktop space, when students study at the desk, in addition to placing the desk lamp, there are also a large number of Books and materials need to be unfolded, and for those students who need to use a tablet computer to browse online courses or find information, placing and fixing the tablet computer has become a big problem, especially for those with small desktop space and unblocked For the study room table; and the base of the traditional desk lamp is not effectively utilized except for the stability of the desk lamp and the switch on it.

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