Supercharge Your Innovation With Domain-Expert AI Agents!

White LED lighting device directly driven by alternating current

A light-emitting device and alternating current technology, which is applied in the direction of electroluminescent light source, electric light source, lighting device, etc., can solve the problems of AC voltage light flickering, damage to LED devices, driving current fluctuations, etc., and overcome LED flickering Phenomenon, reduction of power loss, and effect of improving efficiency

Active Publication Date: 2015-10-21
四川能投智慧光电有限公司
View PDF8 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This patent does not fundamentally solve the phenomenon of light flickering caused by periodic fluctuations in AC voltage
[0006] It can be seen that there is a shortcoming in the disclosed LED AC driving technology: the driving current of the LED will fluctuate with the fluctuation of the AC voltage, resulting in brightness changes when the LED emits light, resulting in the phenomenon of flickering
The AC driving method of the prior art may directly damage the LED device when the AC voltage rises unexpectedly

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
  • White LED lighting device directly driven by alternating current
  • White LED lighting device directly driven by alternating current
  • White LED lighting device directly driven by alternating current

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] see figure 1 and figure 2 , the lighting device in this example includes an AC input terminal 1, a protection unit 2, a rectification unit 3, a sampling unit 4, a switch unit 6 and an LED module 5, and the number of LED modules 5 in this example is 1 (ie n=1). The first output terminal of the rectifier unit in this example is a positive DC output terminal 31 , and the positive terminal 31 is connected to the second output terminal DC output negative terminal 32 through the switch unit 6 of the LED module 5 . see figure 1 . The AC input terminal 1 is connected to the L terminal (phase line) and the N terminal (neutral line) of the AC power, and the AC power is introduced into the protection unit 2 . The protection unit 2 provides the basic protection function for the whole device. It is composed of a varistor VR and a fuse F. The fuse F is connected in series with the phase line, and the varistor is connected in parallel between the phase line and the neutral line. S...

Embodiment 2

[0055] like image 3 As shown, there are 2 LED modules 5 in the light-emitting device of this example, and 2 switch units 6, and the positive terminal 31 of the rectifier unit 3 passes through 2 LED modules and the second switch unit 6 (marked as switch unit 2 in the figure, other The switching unit is labeled similarly) to the negative terminal 32 of the rectifying unit 3, and between the first LED module 5 and the second LED module 5, there is a channel formed by the first switching unit 6 and the negative terminal of the rectifying unit 3 32 connections. In this example, all the switch units 6 are connected to the sampling unit 4 .

Embodiment 3

[0057] like Figure 4 As shown, there are three LED modules 5 of the lighting device in this example, and three switch units 6, and the positive terminal 31 of the rectifier unit 3 is connected to the negative terminal 32 of the rectifier unit 3 through three LED modules and the third switch unit 6, Between the first LED module 5 (marked as LED module 1 in the figure, and other LED modules are marked similarly) and the second LED module 5, there is a channel and rectification unit composed of the first switch unit 6 3 negative terminal 32 connection. Between the second LED module 5 and the third LED module 5 , there is a channel formed by a second switch unit 6 connected to the negative terminal 32 of the rectifier unit 3 . In this example, all the switch units 6 are connected to the sampling unit 4 .

[0058] The circuit schematic diagram of the device in this example is shown in Figure 5 As shown, its working principle and specific circuit structure are similar to those ...

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

An alternating current direct drive white-light LED light-emitting device comprising an alternating current input-end (1), a protection unit (2), and a rectifier unit (3). A first output-end (31) of the rectifier unit (3) is connected to a second output-end (32) via n number of LED modules (5) and one switch unit (6), where n >= 1 and is an integer. When n > 2, a channel constituted by the switch unit (6) is provided between every two LED modules (5) and connects same to the second output-end (32); all switch units (6) are connected to a sampling unit (4). The alternating current input-end (1) is for use in connecting to an alternating current and provides the device with a working current. The protection unit (2) is connected to the alternating current input-end (1) and provides the device with a protection feature. The rectifier unit (3) is connected to the protection unit (2) and rectifies the alternating current outputted by the protection unit (2). The sampling unit (4) is for use in sampling an output voltage of the rectifier unit (2) and outputs a control signal. The switch unit (6) is connected to the sampling unit (4) and is switched on or switched off on the basis of the control signal outputted by the sampling unit (4). The LED modules (5) consists of an LED array, where the LEDs in the array are LEDs having controllable light-emitting life. The alternating current direct drive white-light LED light-emitting device solves the phenomenon of alternating current-induced LED flickering, increases the efficiency of the LED light-emitting device, and extends LED service life.

Description

technical field [0001] The invention relates to a white light LED (light emitting diode) light emitting device, in particular to an alternating current direct drive technology of the white light LED light emitting device. Background technique [0002] As a new type of solid-state light source, LED is expected to become a new generation of lighting source due to its advantages of energy saving, environmental protection and long life. As we all know, almost all existing LEDs are driven by direct current, but our production and living electricity is alternating current. Therefore, in currently used LED products, a power converter is needed to convert AC power into DC power. The introduction of power converters brings many negative effects. First, the life of the power converter is much lower than the life of the LED itself, which shortens the service life of the lighting device; second, the power converter will reduce the efficiency of the lighting device; third, in low-power...

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 Patents(China)
IPC IPC(8): H05B37/02
CPCH05B33/0809Y02B20/341H05B45/37Y02B20/30
Inventor 李东明杨冕封正勇龙文涛赵昆张明
Owner 四川能投智慧光电有限公司
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com