Adjustable-color-temperature dimmable LED (light emitting diode) driving circuit

A technology of LED drive and color temperature, applied in the field of lighting, can solve the problems of complex circuit structure, cumbersome control methods, and low utilization rate of the circuit system, and achieve the effects of simple circuit structure, reduced implementation cost, and simplified control scheme

Inactive Publication Date: 2013-06-26
杭州乐图光电科技有限公司
View PDF4 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] In view of this, the object of the present invention is to provide a novel LED drive circuit with adjustable light and adjustable color temperature to solve the problems of complex circuit structure, cumbersome control methods and low utilization rate of the circuit system in the prior art.

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
  • Adjustable-color-temperature dimmable LED (light emitting diode) driving circuit
  • Adjustable-color-temperature dimmable LED (light emitting diode) driving circuit
  • Adjustable-color-temperature dimmable LED (light emitting diode) driving circuit

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0028] Several preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, but the present invention is not limited to these embodiments. The present invention covers any alternatives, modifications, equivalent methods and schemes made on the spirit and scope of the present invention. In order to provide the public with a thorough understanding of the present invention, specific details are set forth in the following preferred embodiments of the present invention, but those skilled in the art can fully understand the present invention without the description of these details.

[0029] refer to Figure 3A , which is a functional block diagram of a dimmable and adjustable color temperature LED driving circuit according to the first embodiment of the present invention. In this embodiment, a dimmable and adjustable color temperature LED driving circuit 300 is used to drive an LED lighting device 301 composed of thr...

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 relates to an adjustable-color-temperature dimmable LED (light emitting diode) driving circuit. The adjustable-color-temperature dimmable LED driving circuit is used for driving an LED lighting device composed of N LED string lights, wherein N > / = 2. The adjustable-color-temperature dimmable LED driving circuit comprises an energy storage element and N first working paths and second working paths corresponding to the N LED string lights. The energy storage element is shared by the first working paths and the second working paths. According to the adjustable-color-temperature and dimmable requirements of the LED lighting device, when in a first working state, the second working paths are in a disconnection state, at least two first working paths are alternately conducted to receive an input power supply to supply driving power to the corresponding LED string lights; and when in a second working state, the N first working paths are in a disconnection state, and the second working paths are in a conducting state to release the storage energy of the energy storage element.

Description

technical field [0001] The invention relates to the lighting field, in particular to an LED drive circuit with adjustable light and adjustable color temperature. Background technique [0002] As a new type of lighting tool, LED lighting has the advantages of high light efficiency, long life, and environmental protection, so it is more and more widely used in various lighting fields. There are two ways of LED dimming: DC dimming and PWM dimming. Since PWM dimming has the advantages of constant light color and better stability at low brightness, it is widely adopted by those skilled in the art. [0003] For some special light source environments, not only the brightness of the LED lamps needs to be adjusted, but also the color temperature of the LED lamps needs to be adjusted. In the prior art, LED lamps of different colors are usually packaged in a single packaging structure as an independent LED lamp, and different color temperatures are obtained by combining LED lamps of ...

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 张晓峰
Owner 杭州乐图光电科技有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap