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led constant current drive circuit and lamps

A constant current drive and circuit technology, applied in electric light sources, electrical components, electroluminescent light sources, etc., can solve problems such as poor flexibility

Active Publication Date: 2020-07-31
SHENZHEN SUNMOON MICROELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention aims to at least solve one of the above-mentioned technical defects, especially the poor technical defects of flexibility

Method used

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Embodiment Construction

[0036] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0037] Those skilled in the art will understand that unless otherwise stated, the singular forms "a", "an", "said" and "the" used herein may also include plural forms. It should be further understood that the word "comprising" used in the description of the present invention refers to the presence of said features, integers, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, Integers, steps, operations, elements, components, and / or groups thereof. It will be understo...

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Abstract

The present invention provides an LED constant current drive circuit and a lamp, comprising: a power supply module, a detection control module, N strings of LED sub-light groups connected in series, N constant current control modules, and N-1 controllable switch modules, wherein N ≥2; the power supply module is connected in series with N strings of LED sub-light groups to provide a power supply voltage. The connecting wires at one end of each string of LED sub-light groups away from the power supply module are connected to the corresponding constant current control module and then grounded. The constant current control module makes the corresponding LED The sub-lamp groups pass a constant output current; each of the N‑1 string sub-LED lamp groups has a corresponding controllable switch module connected in parallel; the detection control module is used to detect the supply voltage provided by the power supply module, and output N constant currents according to the magnitude of the supply voltage The control signal and N-1 switch control signals are used to respectively control the corresponding constant current control modules, and the N-1 switch control signals respectively control the closing of the corresponding controllable switch modules to short-circuit the corresponding LED sub-light groups to control The N strings of LED sub-lamp groups emit light alternately. A light fixture is also provided.

Description

technical field [0001] The invention relates to the technical field of LED constant current drive, in particular, the invention relates to an LED constant current drive circuit and a lamp. Background technique [0002] In the lighting industry, during the manufacturing process of many LED lighting devices, it may not be possible to determine which country or region the device is finally used in the world, and whether the power supply grid is 110Vac or 220Vac, so it can meet both 110Vac and 220Vac requirements. A grid-powered dual-voltage linear constant-current drive scheme is necessary. [0003] In the traditional dual-voltage linear constant-current drive scheme, the LED lights on load are 2 strings of mutually independent LED lights. The basic working principle is that the 2 strings of lights work in series at high voltage, and the 2 strings of lights work in parallel at low voltage. Using this driving scheme is low in cost, but poor in flexibility, and cannot drive some...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H05B45/34H05B45/325H05B44/00
CPCH05B45/325H05B45/345H05B45/395Y02B20/30
Inventor 李照华于井亮方吉桐
Owner SHENZHEN SUNMOON MICROELECTRONICS