CN201196345Y

CN201196345Y - LED spot light suitable for AC commercial power

Info

Publication number: CN201196345Y
Application number: CNU2008200707686U
Authority: CN
Inventors: 赵功克; 赵电波
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-05-29
Filing date: 2008-05-29
Publication date: 2009-02-18
Anticipated expiration: 2018-05-29

Abstract

The utility model discloses a light-emitting diode (LED) spot light applicable to alternate current commercial power. The LED spot light comprises a transparent plastic lamp shade in which a circuit block is arranged, the circuit block comprises a power circuit board and a printed circuit board, and a plurality of LED diodes are arranged on the printed circuit board and are connected in series positively to form an LED set to be connected with the power circuit board electrically. The light-emitting diode (LED) spot light has the advantages of less light energy scattering, high utilization rate of light energy, more energy conservation and longer service life.

Description

A kind of LED spot light that is applicable to electric main

Technical field

The utility model belongs to field of illumination lamp technology, particularly relates to a kind of LED spot light that is applicable to electric main.

Background technology

Present existing lighting engineering adopts incandescent lamp and fluorescent lighting mostly, but all there is the shortcoming of life-span weak point, power consumption height, poor stability in the two.Light emitting diode (claiming LED again) has advantages such as energy-saving and environmental protection and long-life as a kind of novel light source technology, is widely used in various occasions, as illuminating lamp, signal lamp, ornament lamp or the like.With the light emitting diode be the shot-light of light source when adopting Alternating Current Power Supply LED driving circuit be mostly, connect with the input of full-bridge rectifier after decompression capacitor and the resistance parallel connection, link to each other with civil power again, behind the output of the full-bridge rectifier filter capacitor in parallel, be connected in series several light emitting diodes again, as shown in Figure 1, all the time be full of positive and negative charge on the pole plate of filter capacitor C2, when shot-light is being lighted in the process, loosening because of plug, power line connects insecure, rocks outage to occur, moment energising phenomenon again, occur on the capacitor C 1 repeatedly pressing, capacitor C 1 is carried repeatedly stream to DC side, and this moment, capacitor C 2 lost charging ability, bigger repeatedly stream will make the light emitting diode group damage, so this shot-light only is applicable to low power illuminating lamp, ornament lamp.

Summary of the invention

For overcoming the defective of above-mentioned prior art, the purpose of this utility model provides a kind of LED spot light that is applicable to electric main.

For achieving the above object, the utility model adopts following technical scheme:

The described LED spot light that is applicable to electric main, it comprises the transparent plastic lampshade, be provided with circuit block in the lampshade, circuit block comprises power supply circuit board, printed circuit board, a plurality of light emitting diodes are installed on the printed circuit board, a plurality of light emitting diodes forward on printed circuit board is composed in series the light emitting diode group, is electrically connected with power supply circuit board; Circuit on the circuit block has two loops, and wherein, first loop is, current limiting capacitance C1 is in parallel with resistance R 1, series diode D1, capacitor C 2, K switch successively link to each other with the alternating current 220V mains supply more again, and the negative electrode of diode D1 links to each other with the positive pole of capacitor C 2; Dropping resistor R2 connects with a string light emitting diode group, and is in parallel with capacitor C 2 again; Second loop be, K switch is connected with the parallel circuit of resistance R 1 with capacitor C 3, diode D2 and current limiting capacitance C1, and the anode of diode D2 links to each other with the negative electrode of capacitor C 3; Dropping resistor R3 connects with another string light emitting diode group, and in parallel with capacitor C 3 again, this light emitting diode group equates with the quantity of the light emitting diode group described in first loop; The positive pole of capacitor C 3 links to each other with the negative pole of capacitor C 2.

The described LED spot light that is applicable to electric main, the quantity of its light emitting diode can be 2～62.

Owing to adopt aforesaid technical scheme, the utlity model has following superiority:

This is applicable to the LED spot light of electric main, what adopt is low power LED, but its brightness has reached the floodlighting field, and the luminous energy scattering is few, efficiency of light energy utilization height, more energy-conservation, longer service life, and both made the indoor surround lighting that has, light is bright not dazzling, during as desk lamp, can not produce thermal field, can carry out the part yet and illuminate the space of the specific brightening effect of indoor need at user's head.

Description of drawings

Fig. 1 is the line map of LED driving circuit of the prior art;

Fig. 2 is an operation principle circuit diagram of the present utility model;

Fig. 3 is the operation principle circuit diagram of the utility model one embodiment.

The specific embodiment

As shown in Figure 2, the LED spot light that is applicable to electric main described in the utility model, it comprises the transparent plastic lampshade, be provided with circuit block in the lampshade, circuit block comprises power supply circuit board, printed circuit board, a plurality of light emitting diodes are installed on the printed circuit board, and a plurality of light emitting diodes forward on printed circuit board is composed in series the light emitting diode group, is electrically connected with power supply circuit board; Circuit on the circuit block has two loops, and wherein, first loop is, current limiting capacitance C1 is in parallel with resistance R 1, series diode D1, capacitor C 2, K switch successively link to each other with the alternating current 220V mains supply more again, and the negative electrode of diode D1 links to each other with the positive pole of capacitor C 2; Dropping resistor R2 and a string light emitting diode group ZD0, ZD1 ..., ZDn series connection, in parallel with capacitor C 2 again; Second loop be, K switch is connected with the parallel circuit of resistance R 1 with capacitor C 3, diode D2 and current limiting capacitance C1, and the anode of diode D2 links to each other with the negative electrode of capacitor C 3; Dropping resistor R3 and another string light emitting diode group ZD0 ', ZD1 ' ..., ZDn ' series connection, in parallel with capacitor C 3 again, this light emitting diode group equates with the light emitting diode group quantity described in first loop; The positive pole of capacitor C 3 links to each other with the negative pole of capacitor C 2.

Closing Switch K, when the positive half cycle of alternating current 220V civil power, electric current flow through capacitor C 1, diode D1, resistance R 2 flow into light emitting diode ZD0, ZD1 ..., ZDn forms the loop, the light emitting diode electrified light emitting, simultaneously, power supply is to capacitor C 2 chargings; When the negative half period of alternating current 220V civil power, electric current flow through light emitting diode ZD0 ', ZD1 ' ..., ZDn ', resistance R 3, diode D2, capacitor C 1 form the loop, simultaneously, power supply is to capacitor C 2 chargings; At the half cycle in the time of outage, light emitting diode ZD0, ZD1 ..., ZDn, light emitting diode ZD0 ', ZD1 ' ..., ZDn ' relies on storage capacitor C2, the C3 discharge in each self-loop to keep electrified light emitting respectively.

The described LED spot light that is applicable to electric main can be used as illuminating lamp, signal lamp, ornament lamp, and light emitting diode can be selected shades of colour for use, and suggestion is with white, and also available various colours are as red, yellow, indigo plant etc.

As shown in Figure 3, the circuit on the circuit block is, current limiting capacitance C1 is in parallel with resistance R 1, and series diode D1, capacitor C 2 successively link to each other with the alternating current 220V mains supply more again, and the negative electrode of diode D1 links to each other with the positive pole of capacitor C 2; Dropping resistor R2 and light emitting diode group ZD0, ZD1 ..., ZDn series connection, in parallel with capacitor C 2 again; The negative electrode of diode D1 links to each other with the anode of diode D1, and the anode of diode D1 links to each other with the negative electrode of capacitor C 2.

When the positive half cycle of alternating current 220V civil power, electric current flow through capacitor C 1, diode D1, resistance R 2 flow into light emitting diode ZD0, ZD1 ..., ZDn forms the loop, the light emitting diode electrified light emitting, simultaneously, power supply is to capacitor C 2 chargings; When negative half period, electric current returns mains side through diode D2, capacitor C 1, and electric current is work done not, and the power utilization rate has only half, and storage capacitor C2 discharge is keeping the light emitting diode electrified light emitting, so capacitor C 2 is required to be large bulk capacitance.Because capacitor C 2 has the discharge time of half period, the repeatedly stream that the moment energising is produced has absorbability, the light emitting diode group can not produce overvoltage, overcurrent phenomenon, so LED spot light can work long hours, and light is stable, bright, not shimmer.

Circuit in the present embodiment is applicable to low pressure low-power lighting, ornament lamp, and the quantity of light emitting diode mostly is half of maximum quantity of light emitting diode in the described circuit of Fig. 2 most.

Claims

1. LED spot light that is applicable to electric main, it is characterized in that: it comprises the transparent plastic lampshade, be provided with circuit block in the lampshade, circuit block comprises power supply circuit board, printed circuit board, a plurality of light emitting diodes are installed on the printed circuit board, a plurality of light emitting diodes forward on printed circuit board is composed in series the light emitting diode group, is electrically connected with power supply circuit board; Circuit on the circuit block has two loops, and wherein, first loop is, current limiting capacitance C1 is in parallel with resistance R 1, series diode D1, capacitor C 2, K switch successively link to each other with the alternating current 220V mains supply more again, and the negative electrode of diode D1 links to each other with the positive pole of capacitor C 2; Dropping resistor R2 connects with a string light emitting diode group, and is in parallel with capacitor C 2 again; Second loop be, K switch is connected with the parallel circuit of resistance R 1 with capacitor C 3, diode D2 and current limiting capacitance C1, and the anode of diode D2 links to each other with the negative electrode of capacitor C 3; Dropping resistor R3 connects with another string light emitting diode group, and in parallel with capacitor C 3 again, this light emitting diode group equates with the quantity of the light emitting diode group described in first loop; The positive pole of capacitor C 3 links to each other with the negative pole of capacitor C 2.

2. the LED spot light that is applicable to electric main according to claim 1 is characterized in that: the quantity of its light emitting diode can be 2～62.