Unlock instant, AI-driven research and patent intelligence for your innovation.

LED (Light Emitting Diode) lamp control circuit

A technology for controlling circuits and LED lamps, which is applied to the layout of electric lamp circuits, electric light sources, lighting devices, etc., and can solve problems such as large size, unsuitable for LED lighting lamps, and inability to match the life of LED lighting lamps.

Inactive Publication Date: 2011-05-18
AD TOYO LIGHTING GUANGZHOU
View PDF3 Cites 27 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The passive power factor correction circuit has a simple structure, but it is large in size and heavy in weight, so it is not suitable for use in LED lighting fixtures
The active power factor correction circuit is a high-frequency switching conversion. Although the volume is small, the life of the electrolytic capacitor limits the life of the circuit, which cannot match the life of LED lighting fixtures of more than 50,000 hours.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • LED (Light Emitting Diode) lamp control circuit
  • LED (Light Emitting Diode) lamp control circuit
  • LED (Light Emitting Diode) lamp control circuit

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0032] Figure 1~4 In the embodiment, the first switch is marked as K1, the second switch is marked as K2, and the third switch is marked as K3, LED1~LEDn are the first pair of LEDs, LEDn+1~LED2n are the second pair of LEDs, figure 1 D1 in image 3 D5 in is a one-way flow element.

[0033] The one-way conduction element referred to in this paper can use components and devices with a one-way conduction function such as diodes, triodes, and MOS tubes.

[0034] Such as figure 1 The circuit includes a rectifier bridge, the two input terminals of the rectifier bridge are connected to the AC voltage, and the other two output terminals of the rectifier bridge are connected to the positive and negative ends of 2n LED light sources in series, the nth and n+1th An anti-backflow diode D1 is connected in series between the LED light sources as a unidirectional flow-conducting element. The cathode of the anti-backflow diode D1 is connected to the positive terminal of the electronic swit...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses an LED (Light Emitting Diode) lamp control circuit comprising a first LED terminal, a second LED terminal and a parallel / series switching structure, wherein the first LED terminal is connected with a first secondary LED, the second LED terminal is connected with a second secondary LED, and the parallel / series switching structure is controlled by the instantly supplied voltage. When the supplied voltage is lower, the parallel / series switching structure is used for switching the two connected LEDs to be parallel; and when the supplied voltage is higher, the parallel / series switching structure is used for switching the two connected LEDs to be in series. In the invention, a detection and on-off control electronic switch type power factor rectification circuit and a constant current circuit are provided; therefore, an AC / DC (Alternating current / Direct Current) converter does not need to be installed in a lamp so that the fault rate of devices is reduced; in addition, the invention has the advantages of novel structure, simple circuit, low cost, high power factor, long service life, good electricity saving effect and the like.

Description

technical field [0001] The invention relates to a control circuit of an LED lighting lamp, in particular to a control circuit capable of improving the power factor of the LED lamp. Background technique [0002] With the increasingly wide application of power electronic devices, the problem of harmonic pollution has attracted more and more attention. Electrical equipment in Europe must now comply with the European norm EN61000-3-2. This requirement applies to most appliances with an input power of 75W or more, and it specifies the maximum amplitude of power frequency harmonics including up to the 39th harmonic. While there is no such requirement in the US, power supply manufacturers looking to sell their products globally are designing products to meet this requirement. [0003] Using power factor correction technology, the AC input current waveform can completely track the AC input voltage waveform, so that the input current waveform is a pure sine wave and has the same ph...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): H05B37/02
Inventor 林林
Owner AD TOYO LIGHTING GUANGZHOU