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High-efficiency lighting device

A lighting device, high-efficiency technology, applied in the direction of lighting devices, lighting devices, lighting device components, etc., can solve the problems of low power density, high loss, switching loss, etc., to improve the working life and reliability, low loss, The effect of high power density

Inactive Publication Date: 2015-08-12
武汉绿鼎天舒科技发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, the lighting device using the switching power supply used in the above-mentioned lighting device has switching loss, a surge voltage that will be generated when the switching element is turned off, and poor working stability of the lighting device caused by voltage instability, high loss, and low power density. The problem of low working life and reliability; and the traditional lighting device, which only serves as a lighting tool, cannot meet the paper consumption needs of people sitting at the desk

Method used

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Embodiment Construction

[0029] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0030] Such as figure 1 As shown, the switching power supply in the lighting device of the present invention includes an input voltage U in , the primary side and the secondary side have a transformer T with center taps, switching elements S1, S2, S3, S4, diodes D1, D2, D3, D4, and an inductor L. The above switching elements are IGBTs, and the diodes are fast recovery diodes.

[0031] combined with figure 1 The switching power supply structure in the high-reliability lighting device of the present invention is described in detail, and the specific connection relationship is: input voltage U in The positive terminal is connected to the collectors of switching elements S1 and S3, and the input voltage U in The negative terminals of the diodes D1 and D2 are connected to the cathodes of the diodes D1 and ...

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Abstract

The invention provides a high-efficiency lighting device which comprises a lighting device pedestal, a switching power supply, a lamp stand and a lamp holder, the lamp holder is mounted at the top of the lamp stand, and the switching power supply comprises a resonant converter which includes an intermediately tapped transformer. The high-efficiency lighting device with the resonant converter which includes the intermediately tapped transformer is low in loss and high in power density, the work life and reliability of the lighting device can be improved, and the requirement for using paper at any time can be met.

Description

technical field [0001] The invention belongs to the field of lighting tools, in particular to a high-efficiency lighting device. Background technique [0002] Lighting devices have long become a necessity for people's life and study, especially for students and working families who need to study at home. [0003] At present, while satisfying the functions of lighting tools, traditional lighting devices often use switching power supplies to switch on and off. The working process of switching power supplies used in traditional lighting devices is through "chopping", that is, chopping the input DC voltage into amplitudes. This is achieved by a pulse voltage equal to the amplitude of the input voltage. 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...

Claims

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Application Information

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IPC IPC(8): H05B37/02F21V33/00H02M7/537
CPCY02E10/56
Inventor 杨慧萌
Owner 武汉绿鼎天舒科技发展有限公司