CN204119604U

CN204119604U - The Multi-channel high-frequency impulse circuit of LED lamp

Info

Publication number: CN204119604U
Application number: CN201420517393.9U
Authority: CN
Inventors: 沈煜; 朱正菲
Original assignee: ZHEJIANG ENERGY AND NUCLEAR TECHNOLOGY APPLICATION RESEARCH INSTITUTE
Current assignee: ZHEJIANG ENERGY AND NUCLEAR TECHNOLOGY APPLICATION RESEARCH INSTITUTE
Priority date: 2014-09-10
Filing date: 2014-09-10
Publication date: 2015-01-21
Anticipated expiration: 2024-09-10

Abstract

The utility model relates to a kind of Multi-channel high-frequency impulse circuit of LED lamp.The purpose of this utility model is to provide the Multi-channel high-frequency impulse circuit of simple, the lower-cost LED lamp of a kind of structure, with pulsed drive LED lamp, reduces LED heating, reduces energy consumption, improve useful life.The technical solution of the utility model is: a kind of Multi-channel high-frequency impulse circuit of LED lamp, it is characterized in that: comprise one piece of single-chip microcomputer IC1, three groups of LED lamp and three MOS power switch pipes, often organize the LED lamp that LED lamp has some series connection, LED lamp group one termination power, the other end successively through filter inductance, MOS power switch pipe and grounding through resistance, described single-chip microcomputer IC1 control MOS power switch pipe break-make.

Description

The Multi-channel high-frequency impulse circuit of LED lamp

Technical field

The utility model relates to a kind of Multi-channel high-frequency impulse circuit of LED lamp.

Background technology

LED light source as light source of new generation, just in fast development.LED (semiconductor light-emitting-diode) is a kind of solid-state light emitting semiconductor device, and it directly can be converted into light electricity.Have low-tension supply, power consumption less, the advantage such as applicability is strong, stability is high, response time short (switching characteristic is good), environmentally safe, multicolor luminous, color developing is good, be the new light sources be worthy to be popularized.

Lighting is the aid as mankind's work when night or natural daylight are not enough, life, can work, learn, walk, drives and live for people and provide the brightness service of the best in other.Because the eyes of people also exist a visual persistence to brightness change, when each second, brightness change was lower than 25 times, the eyes of people can be felt only to flash, when each second, brightness change was more than 25 times, the eyes of people can feel that light does not flash, persistence of vision effect that Here it is.

Comprise some trace impurities in fluorescent material, and the energy level of these impurity is positioned at forbidden band, is equivalent to trap level, after the electronics be excited from valence band enters conduction band, these trap levels can be fallen into again.Because these by trap level the excitation electron of catching first must depart from after trap level enters conduction band and transition could get back to valence band, so after they are launched into photon excitation, needing to postpone a period of time just can luminescence, and this has just occurred afterglow effect.

The principal element in LED lamp useful life is, the too high problem of the junction temperature due to LED and other composite factor.It is high that the LED that traditional constant current drives also exists temperature, the problem that optical attenuation is large.Therefore, under adopting constant current drive pattern, cannot improve or exceed rated current work, this can shorten the useful life of LED lamp.

Summary of the invention

The technical problems to be solved in the utility model is: for above-mentioned Problems existing, provides the Multi-channel high-frequency impulse circuit of simple, the lower-cost LED lamp of a kind of structure, with pulsed drive LED lamp, reduces LED heating, reduces energy consumption, improve useful life.

The technical scheme that the utility model adopts is: a kind of Multi-channel high-frequency impulse circuit of LED lamp, it is characterized in that: comprise one piece of single-chip microcomputer IC1, three groups of LED lamp and three MOS power switch pipes, often organize the LED lamp that LED lamp has some series connection, LED lamp group one termination power, the other end successively through filter inductance, MOS power switch pipe and grounding through resistance, described single-chip microcomputer IC1 control MOS power switch pipe break-make.

Described single-chip microcomputer IC1 is 8 single-chip microcomputer PIC16F716.

Described single-chip microcomputer IC1 the 11st, 12,13 pins connect three MOS power switch pipes respectively; Single-chip microcomputer IC1 the 18th, 1,2 pins connect three MOS power switch pipes and ohmic connection points respectively.

The beneficial effects of the utility model are: the utility model have employed the persistence of vision effect and phosphor persistence effect that utilize human eye, and adopt Multi-channel high-frequency pulse drive mode to reduce the method for LED light source heating, realize reducing energy consumption, improve useful life.

Accompanying drawing explanation

Fig. 1 is the circuit theory diagrams of embodiment.

Fig. 2 is the PWM waveform figure that in embodiment, single-chip microcomputer exports.

Embodiment

As shown in Figure 1, the present embodiment is a kind of Multi-channel high-frequency impulse circuit of LED lamp, comprise one piece of single-chip microcomputer IC1 (PIC16F716), three groups of LED lamp and three MOS power switch pipes Q1, Q2, Q3, often organize LED lamp and be in series by several LED lamp.LED lamp group one termination power, the other end is successively through filter inductance (L1, L2, L3), MOS power switch pipe (Q1, Q2, Q3), resistance (R1, R2, R3) ground connection, single-chip microcomputer IC1 control MOS power switch pipe Q1, Q2, Q3 break-make, thus control corresponding LED lamp power on/off.

In the present embodiment single-chip microcomputer IC1 the 11st, 12,13 pins meet MOS power switch pipe Q3, Q2, Q1, respectively for control MOS power switch pipe break-make.Single-chip microcomputer IC1 the 18th, 1,2 pins connect MOS power switch pipe and ohmic connection points respectively, the current signal of sampling tie point.

Single-chip microcomputer IC1 exports PWM ripple, and MOS power switch pipe Q3, Q2, Q1 are opened respectively, when ensureing series LED light source works brightness, reduces the operating time of LED light source, to arrive energy-saving and cost-reducing effect.

Pulsed driving mode is by the programming to PIC16F716 single-chip microcomputer, various modes can be designed, such as 33%, 50%, 83%PWM output waveform (see Fig. 2), in one-period single-chip microcomputer IC1 the 11st, 12,13 pin export high level mutually coordinate, be uniformly distributed.

The present embodiment utilizes 8 single-chip microcomputer PIC16F716 as core controller, produce the drive singal of multichannel, with the high-frequency impulse type of drive of more than 20KHz, make electric current pass through blueness or other color LED chip luminous, and other is photochromic to inspire white light etc. by fluorescent material filter.

Due to persistence of vision effect and the phosphor persistence effect of human eye, the visual brightness in human eye is made to remain on higher effect state.Adopt the method, little power consumption short by the current time of LED chip, heating are little, reduce LED power consumption, extend the LED life-span, reduce the object of radiator structure part so can be issued in isometropia brightness.

Adopt Multi-channel high-frequency pulsed drive LED lamp, can effectively solve narrow high-frequency impulse duty ratio less than normal when light efficiency can obviously decline, and to solve because exceed the quata to determine the heating that current work brings.High-frequency impulse also can reduce the visual fatigue because the visual stroboscopic of light fixture causes.Because pulse drive mode LED light source does not work within the complete period, the time of LED actual flow overcurrent is short, and the electric energy of consumption is few, LED chip caloric value also can obviously reduce, and in light fixture, temperature rise reduces, and can reduce the cost of radiator structure part, useful life can extend greatly, and energy-saving effect is obvious.Experiment shows, reach identical human eye " visual brightness ", and the comparable DC driven mode of pulse drive mode economizes on electricity 20% ~ 60%.As a kind of LED electrical light source of novel high-efficiency and energy-saving longevity, there is huge Social benefit and economic benefit undoubtedly.

Claims

1. the Multi-channel high-frequency impulse circuit of a LED lamp, it is characterized in that: comprise one piece of single-chip microcomputer IC1, three groups of LED lamp and three MOS power switch pipes, often organize the LED lamp that LED lamp has some series connection, LED lamp group one termination power, the other end successively through inductance, MOS power switch pipe and grounding through resistance, described single-chip microcomputer IC1 control MOS power switch pipe break-make.

2. the Multi-channel high-frequency impulse circuit of LED lamp according to claim 1, is characterized in that: described single-chip microcomputer IC1 is 8 single-chip microcomputer PIC16F716.

3. the Multi-channel high-frequency impulse circuit of LED lamp according to claim 2, is characterized in that: described single-chip microcomputer IC1 the 11st, 12,13 pins connect three MOS power switch pipes respectively; Single-chip microcomputer IC1 the 18th, 1,2 pins connect three MOS power switch pipes and ohmic connection points respectively.