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LED driving device and method for improving current harmonic distortion of LED driving device

A technology of LED devices and LED drivers, which is applied in lighting devices, electric light sources, electrical components, etc., can solve problems that are not conducive to product mass production and market popularization, and achieve increased LED utilization, improved power factor, and improved current harmonics. wave distortion effect

Active Publication Date: 2017-12-22
PRINCETON TECH CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The two methods mentioned above are not conducive to product mass production and market popularization

Method used

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  • LED driving device and method for improving current harmonic distortion of LED driving device
  • LED driving device and method for improving current harmonic distortion of LED driving device
  • LED driving device and method for improving current harmonic distortion of LED driving device

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Embodiment Construction

[0053] Since the present disclosure allows various changes and various embodiments, specific implementation examples will be shown in the drawings and described in detail below. However, this is not intended to limit the present disclosure to a specific implementation mode, and it should be understood that all changes, equivalents, and replacements that do not depart from the spirit and technical scope of the present disclosure are included in the present disclosure. In the attached illustration, the dimensions of the structure are expanded for clarity.

[0054] When terms like "first", "second" or similar are used to describe various elements, these elements should not be limited by the above-mentioned terms. The terms described above are only used to distinguish one element from another. For example, the first element can be regarded as the second element without departing from the scope of the rights of the present disclosure, and similarly, the second element can be regarded...

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Abstract

An LED driving device and a method for improving current harmonic distortion of the LED driving device. The LED driving device is used to drive multiple LED modules. The LED driving device includes a multi-segment linear LED driver, a first current compensation device, and a second current compensation device. The multi-segment linear LED driver is coupled to a plurality of LED modules, and selectively provides a first path for passing a first fixed current to a first LED module of the plurality of LED modules or provides a second path for passing a second fixed current to The first LED module and a second LED module of the plurality of LED modules. When the first path is provided, the first current compensation device flows a first compensation current, and when the second path is provided, the first current compensation device stops flowing the first compensation current. When the second path is provided, the second current compensation device flows a second compensation current. The invention improves the harmonic distortion of the current flowing into the LED driving device, increases the utilization rate of the LED, improves the overall light output and improves the power factor.

Description

Technical field [0001] The present disclosure relates to a driving device, in particular to an LED driving device. Background technique [0002] Segmented linear drivers are widely used to drive light-emitting diodes (LEDs). However, linear drivers can cause current harmonic distortion problems. The European standard EN61000-3-2 restricts harmonic currents, and most of the existing linear drivers and segment-conduction linear LED drivers (or ICs) cannot meet the European standard EN61000-3-2. In the linear driver architecture, in order to improve the current harmonic distortion, the existing method can only increase the number of segments of the segmented turn-on linear LED driver IC. When the number of segments is increased to five or six segments, the current harmonic distortion can meet the European standard EN61000-3-2. However, this approach will lead to increased IC cost and design difficulty. In addition, if it is made with discrete parts, it will also increase the pri...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H05B37/02H05B44/00
CPCH05B45/44H05B45/395Y02B20/30H05B45/46
Inventor 兰瑜瑾
Owner PRINCETON TECH CORP