Check patentability & draft patents in minutes with Patsnap Eureka AI!

Circuits for operating light emitting diodes (leds)

A technology for driving circuits, controlling circuits, applied in the field of circuits for operating light-emitting diodes (LEDs), capable of solving problems such as lowering display quality or color rendering index

Active Publication Date: 2016-05-25
特里多尼克股份有限公司
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, there is usually also a spectral gap or at least one spectral valley 10 between the actual (e.g. blue) spectrum 8 of the lighting component chip and the second (yellow or red) converted spectrum 9 of the conversion layer, resulting in a reduced display quality or color rendering index

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
  • Circuits for operating light emitting diodes (leds)
  • Circuits for operating light emitting diodes (leds)
  • Circuits for operating light emitting diodes (leds)

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0035] figure 1 A first exemplary embodiment of a circuit arrangement 130 according to the invention for controlling light-emitting diodes 34 is shown. Circuit arrangement 130 has a switching converter formed by choke coil L1 , capacitor C1 , freewheeling diode D1 , switch S1 and light-emitting diode 34 .

[0036] A control circuit, such as an IC (microcontroller, ASIC, combinations thereof, etc.) controls switch S1.

[0037] In this example, the switching converter is formed as a buck converter, however, other topologies such as a boost converter (see Figure 5 ), a flyback converter, PFC or even a buck-boost converter. A number of resistors ("shunts") are provided to monitor the current and voltage in the switching converter and across the light emitting diodes 34 . Therefore, resistor R S It is used to monitor the current flowing through the switch S1 while the switch S1 is on, where the shunt R S The voltage across the U S characterize the current.

[0038] current ...

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 present invention proposes a driving circuit for supplying operating current to at least one lighting component, such as a light-emitting diode, the driving circuit includes a switching converter (130), and the switching converter has a control circuit The controlled switch (S1), wherein the choke coil (LI) is charged when the control circuit controls the switch in a conducting state, and when the control circuit controls the switch in a non-conducting state, the The discharge of the choke coil, wherein, by providing an external signal or an internal feedback signal to the control circuit, the control circuit is designed to change the timing of the switch so as to change the operating mode of the switching converter to continuous conduction Any one of mode CCM, boundary (transition, critical) conduction mode BCM, and discontinuous conduction mode DCM.

Description

technical field [0001] The invention relates to a circuit arrangement for operating light-emitting diodes and a method for achieving this object. Background technique [0002] Traditional light emitting diodes (LEDs) emit light in a limited spectral range. For example, figure 1 The spectra of blue 1 , green 2 , yellow 3 and red 4 LEDs are shown. Modules are known in which light-emitting diodes of different colors, for example blue and yellow (two LEDs), or red, green and blue (RGB), are combined such that the light of the individual light-emitting diodes is mixed, for example by means of a diffusing screen, and The mixed light appears white or the resulting spectrum 5 extends over the entire visible range. [0003] Although the light is substantially "white", there are valleys 6, 7 in the spectrum of the emitted light. These troughs have a detrimental effect because, for example, objects with colors within these gaps take on a very dull appearance. The color rendering q...

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): H05B33/08H05B44/00
CPCH05B45/14H05B45/44H05B45/3725H05B45/375
Inventor 迈克尔·齐默尔曼爱德华多·佩雷拉
Owner 特里多尼克股份有限公司
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