Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

LED driving circuit applicable to silicon controlled rectifier light modulator, and control circuit thereof

A technology of LED drive and control circuit, applied in the direction of electric lamp circuit layout, light source, electric light source, etc., can solve the problem of high cost

Active Publication Date: 2015-12-09
HANGZHOU SILAN MICROELECTRONICS
View PDF5 Cites 10 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the cost of the two-stage dimming method is relatively high. Therefore, it is a work of great practical application value to study a single-stage dimming drive circuit and its control circuit with a simple structure and high performance.

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 driving circuit applicable to silicon controlled rectifier light modulator, and control circuit thereof
  • LED driving circuit applicable to silicon controlled rectifier light modulator, and control circuit thereof
  • LED driving circuit applicable to silicon controlled rectifier light modulator, and control circuit thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0143] The present invention will be further described below in conjunction with specific embodiments and accompanying drawings, but the protection scope of the present invention should not be limited thereby.

[0144] refer to figure 1 , the LED drive circuit applicable to the thyristor dimmer in this embodiment includes: thyristor dimmer TR1, rectifier bridge B1, first damping circuit 100, second damping circuit 200, bleeder circuit 300, input filter The circuit 400, the LED driver 500, the control circuit 1600, the switch tube Q1, the sampling resistor Rs and the output capacitor Co.

[0145] refer to figure 2 , the control circuit 1600 may include: dimming phase detection circuit 600, phase filter circuit 700, dummy load drive circuit 800, nonlinear reference circuit 900, average current loop adjustment circuit 1000, reset circuit 1100, intermittent delay circuit 1200, output A current simulation circuit 1300 , a zero-crossing detection circuit 1400 and a main driving c...

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 an LED driving circuit applicable to a silicon controlled rectifier light modulator, and a control circuit thereof. The control circuit comprises a light modulation phase detection circuit, a phase filtering circuit connected with the light modulation phase detection circuit, a non-linear reference circuit connected with the phase filtering circuit, a zero cross detection circuit in direct or indirect coupling with an output end of the LED driving circuit, an output current simulation circuit connected with the zero cross detection circuit, an average current ring adjusting circuit connected with the non-linear reference circuit and the output current simulation circuit, a reset circuit connected with the average current ring adjusting circuit, an interrupted time-delay circuit connected with the phase filtering circuit, and a main driving circuit connected with the reset circuit, the interrupted time-delay circuit and the zero cross detection circuit. The control circuit can realize high power factor single-stage light modulation and has advantages of no scintillation and good compatibility.

Description

technical field [0001] The invention relates to LED driving technology, in particular to an LED driving circuit and a control circuit suitable for a thyristor dimmer. Background technique [0002] Compared with conventional light sources such as incandescent lamps and fluorescent lamps, LED lamps have the advantages of high efficiency, good directionality, good stability, high reliability, and long life, so they are widely used in various places. The thyristor dimming method is one of the most widely used dimming methods for LEDs at present, and it is widely used in fields such as stage lighting and ambient lighting. As we all know, due to the characteristics of the thyristor dimmer, it needs a certain maintenance current to ensure the conduction, so it cannot be directly connected in series with the live line of the LED driver, and the LED driver circuit needs to be modified accordingly. [0003] The usual solution in the prior art is to carry out two-stage dimming: that i...

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 谢小高叶美盼蔡拥军
Owner HANGZHOU SILAN MICROELECTRONICS
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com