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

Drive circuit, lighting circuit, and lighting device

A technology for driving circuits and lighting circuits is applied in the field of circuits to achieve the effects of reducing withstand voltage, improving power factor and THD, and reducing volume

Pending Publication Date: 2022-03-18
安徽展晖电子科技有限公司
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] 1. The power factor still needs to be further improved
[0006] 2. Energy conversion efficiency needs to be further improved
[0007] 3. The minimum value of the input voltage needs to be further improved

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
  • Drive circuit, lighting circuit, and lighting device
  • Drive circuit, lighting circuit, and lighting device
  • Drive circuit, lighting circuit, and lighting device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0078] Such as figure 1 As shown, this embodiment provides a lighting circuit, which is applied to a load 004 powered by an AC rectified power supply 000, and includes a drive circuit 001 and a load 004. The drive circuit 001 includes an energy storage module C01 connected in series with the negative electrode of the energy storage module C01. The current limiting module 003 and the control circuit 002 for adjusting the current of the current limiting module 003, the two ends of the series body composed of the energy storage module C01 and the current limiting module 003 are connected to the two ends of the load 004, and the AC rectified power supply 000 The two ends are respectively connected to the two ends of the load 004 to supply power to the load 004 and charge the energy storage module C01. Specifically, the positive pole of the AC rectified power supply 000 is connected to the positive pole of the energy storage module C01 and the load 004, and the AC rectified power su...

Embodiment 2

[0118] In the lighting circuit provided in Embodiment 1, since the current limiting module 003 is connected in series to the energy storage module C01, the impedance of the current limiting module 003 is relatively high, so the series body composed of the energy storage module C01 and the current limiting module 003 has no effect on electromagnetic interference. (EMI) suppression ability is poor, therefore, when the load 004 generates electromagnetic interference, for example, when the load 004 is a dimming load including a power supply module, since the power supply module is usually implemented by a switching power supply, and the switching power supply will generate a strong electromagnetic interference, if Figure 9 As shown, directly connecting an LC low-pass filter 17 in parallel at both ends of the load 004 will reduce the power factor of the circuit. In summary, the lighting circuit provided in Embodiment 1 will no longer be used due to its weak electromagnetic interfer...

Embodiment 3

[0135] This embodiment provides a drive circuit 010 for driving a load powered by an AC rectified power supply 000. Unless otherwise specified, each structure and reference numerals are the same as those in Embodiment 1 and Embodiment 2. Herein No longer.

[0136] The load consists of multiple load cells, for illustration purposes, such as Figure 15 As shown, the number of load units is two as an example for illustration. The two load units are respectively the first load unit X1 and the second load unit X2. The drive circuit 010 includes a first switch S01 and a second switch S02. The first switch One end of S01 and second switch S02 is connected to the negative polarity end of the AC rectified power supply 000, and the other end is respectively connected to the negative polarity ends of the first load unit X1 and the second load unit X2, and the drive circuit 010 also includes a control The circuit 011, the control circuit 011 is connected with the first switch S01 and the...

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 provides a driving circuit, a lighting circuit and a lighting device, the driving circuit is used for driving a load powered by an AC rectification power supply, and the driving circuit comprises an energy storage module which can supply power to the load when the output voltage of the AC rectification power supply is not enough to drive the load; the current limiting module is connected with the energy storage module in series so as to limit the current of the energy storage module; the output end of the control circuit is connected with the control end of the current limiting module, and the control circuit can send a fourth electric signal to the current limiting module so as to control the conduction current of the current limiting module; wherein a series connection body formed by the energy storage module and the current limiting module is used for being coupled with the two ends of the alternating current rectification power supply. The charging current of the energy storage module can be dynamically controlled while the power factor is improved and the light-emitting stroboflash is eliminated, the energy conversion efficiency of the circuit is improved, and overpower protection is provided for the current limiting module.

Description

technical field [0001] The invention relates to the field of circuits, in particular to a driving circuit, a lighting circuit and a lighting device. Background technique [0002] In the prior art, in a lighting circuit that uses an AC rectified power supply to drive a luminous load, the energy storage module is usually coupled at both ends of the luminous load, and the energy storage module is charged through an AC rectified power supply to maintain the voltage valley at both ends of the energy storage module (minimum value) is always greater than the turn-on voltage drop of the luminous load, so that when the effective value of the AC rectified power supply voltage is insufficient, the energy storage module discharges to supply power to the luminous load. When the AC rectified power supply charges the energy storage module, the peak value of the charging current is very high, resulting in a low power factor of the lighting circuit, usually only about 0.5. If the energy sto...

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
Patent Type & Authority Applications(China)
IPC IPC(8): H05B47/10H05B45/30H05B45/36H05B45/3725
CPCH05B47/10H05B45/30H05B45/36H05B45/3725Y02B20/30Y02B20/40
Inventor 邵蕴奇
Owner 安徽展晖电子科技有限公司