CN201273485Y

CN201273485Y - AC power supply water-proof parallel type LED lamp

Info

Publication number: CN201273485Y
Application number: CNU2008201422937U
Authority: CN
Inventors: 陈大庆; 甄立新
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-10-08
Filing date: 2008-10-08
Publication date: 2009-07-15
Anticipated expiration: 2018-10-08

Abstract

The utility model relates to an alternating current power supply water-proof type parallel connection type LED lamp, which comprises an LED lamp belt which is composed of a plurality of LEDs which are connected mutually, wherein the LED lamp belt is connected with a power supply through a power cord. The alternating current power supply water-proof type parallel connection type LED lamp is characterized in that two pins of each LED are connected with the power cord in parallel on arbitrary directions, the power cord is connected with an intermediate frequency alternating current power supply, the power supply frequency is 30KHz to 60KHz, the load output voltage of the belt is 2 to 3V, a negative feedback circuit is arranged, and the LED lamp strip can be provided with carriers which are used to fix the LED lamp belt. The alternating current power supply water-proof type parallel connection type LED lamp has the beneficial effects that the LED lamp belt can be cut into arbitrary length, power can be supplied with low voltage directly, the intermediate frequency alternating current supplies power can not generate breakage easily, damage of few LEDs can not affect the lighting effect of the whole lamp, power is supply through intermediate frequency alternating current, frequency flash can not be generated, LED pins can be connected in parallel on arbitrary directions, the manufacture is convenient, the LEDs can work in water reliably, the power supply is provided with the negative feedback circuit, when load generates short circuits, the power supply can be protected, and power supply can be recovered automatically when the failures are eliminated.

Description

The parallel LED lamp of Alternating Current Power Supply water proof type

Technical field

The utility model relates to the light source that a kind of LED of utilization makes, and relates in particular to the parallel LED lamp of a kind of Alternating Current Power Supply water proof type.

Background technology

In the busy section of town, cities and towns, the neon light that the font size signboard of a large amount of for many years outdoor advertisings and merchant store adopts is low pressure cold cathode glow gases discharge lamp, this traditional neon light high energy consumption, low life-span, and contaminated environment, it is serious that scarce pen is drawn phenomenon less.In recent years the led light source of Xing Qiing is owing to have energy-conservation, environmental protection, advantages such as long-life, obtain tremendous development, the LED lamp that has occurred at present mainly comprises by some LED and current-limiting resistance connection and is fixed on lamp band and the cover body that forms on the carrier, the lamp band is sealed in the cover body, and by power line connection dc source, it is energy-conservation, environmental protection, light transmission is good, cost is low, can be used as curtain wall solid matter pipe, Landscape Lighting lamp and guard rail lamp, but there is following defective in existing LED lamp: (1) should not be used as picture and text and show, because of character pattern size and stroke style conversion multiterminal, the required lamp belt length of each section luminescence unit weak point differs, and existing LED lamp band all adopts the mode that is connected in series of LED and current-limiting resistance sectional power supply because of LED, and length can not be cut arbitrarily, general lamp strip length can not be less than 1 meter, and, under higher DC voltage, the puncture of LED takes place easily, may cause whole lamp or one section LED lamp band not to work in case LED damages, obviously influence the picture and text display effect; (2) owing to the employing dc source, the uniformity of necessary strict guarantee LED polarity during connection, polarity can not be made mistakes when power supply was connected with LED, had strengthened technology difficulty; Simultaneously, adopt direct current supply,, make the lead corrosion when under water or be exposed to the phenomenon that to produce electrolysis when using in the rainwater environment, lamp body damages, therefore sealing technology is required harshness, improve processing cost, in fact, be subjected to direct influence because of its sealing problem the service life of LED lamp at present, in sum, improve the defective of existing LED lamp, become the problem that LED lamp industry is paid close attention to.

The utility model content

Main purpose of the present utility model is to improve on the basis of existing LED lamp at the problems referred to above, provide that a kind of length can be cut arbitrarily, manufacture craft simple and can be in water the parallel LED lamp of the Alternating Current Power Supply water proof type of reliably working.

The technical scheme that its technical problem that solves the utility model adopts is:

The parallel LED lamp of a kind of Alternating Current Power Supply water proof type, comprise the LED lamp band that constitutes by some interconnective LED, LED lamp band is connected to power supply by power line, it is characterized in that described each LED two pins is connected in parallel on the power line with any direction, and power line is connected to the midfrequent AC power supply.

Described midfrequent AC power supply is that frequency is that 30KHz～60KHz, bringing onto load output voltage are 2～3V and the midfrequent AC power supply that is provided with negative-feedback circuit.

Described LED lamp band is provided with the carrier that is fixed.

The beneficial effects of the utility model are: because LED is connected in parallel, and do not add current-limiting resistance, directly by the power supply power supply, therefore the lamp band that forms behind the LED has been installed on the LED carrier can accomplish the shearing of random length every LED, has solved the drawback that the lamp band of 1 meter of less than can't use; And, adopt 2～3V interchange LVPS of suitable LED directly to power, LED can not puncture, spoilage is extremely low, and when certain LED damage occurring, it is luminous also not influence other LED, because of single LED size minimum, even if break down only is that a point does not work, and causes whole lamp not work or the big section drawback that LED lamp band does not work thereby avoided a LED to damage, and perfection has solved the picture and text integrity issue; In addition, adopt the midfrequent AC power supply, the alternative frequency height, even make the LED lamp be in the interruption "on" position, its illumination effect with to connect the dc source effect identical, does not produce stroboscopic yet, and the LED two pins can with any direction not polarity be connected in parallel on the power line, easy to process, improved production efficiency; Simultaneously, owing to adopt AC power, the single parallel connection of LED lamp, reach under water in the rainy day environment, electrolysis can not take place, lead can not damage because of electrolytic etching, not only reduced harsh waterproof sealing technological requirement, also guaranteed LED lamp reliably working in water, increased the service life; Especially be connected with negative-feedback circuit in the midfrequent AC power supply, when load short circuits occurring, can make power supply unlikely the burning that quit work, fault is got rid of the back automatic recovery of power supply.

Below in conjunction with drawings and Examples the utility model is described in detail.

Description of drawings

Fig. 1 is the structure chart of the midfrequent AC power supply of the utility model connecting band negative-feedback circuit;

Fig. 2 is the circuit theory diagrams of the midfrequent AC power supply of the utility model connecting band negative-feedback circuit.

The specific embodiment

Fig. 1～Fig. 2 shows the parallel LED lamp of a kind of Alternating Current Power Supply water proof type, comprise by some interconnective LED (Fig. 1, among Fig. 2 4) the LED lamp band of Gou Chenging, LED lamp band is connected to power supply by power line 1, it is characterized in that described each LED two pins is connected in parallel on the power line 1 with any direction, as shown in Figure 2, above-mentioned midfrequent AC power supply is the midfrequent AC power supply that is provided with negative-feedback circuit, its frequency is 30KHz～60KHz, and its bringing onto load output voltage is 2～3V.

In actual applications, described LED lamp band can be only to connect the lamp string that LED forms by lead, is about to formation LED lamp band between the bare conductor that LED directly is welded on two softnesses; Can also on the lamp band, be provided with the carrier that is fixed.As shown in Figure 1, in this example, LED and connection lead fixed are constituted the lamp band on carrier 5, in the fluorescent tube 3 of again the lamp band being packed into, fluorescent tube 3 two-port are loaded onto end cap 2, and power line 1 passes from end cap 2, is connected to midfrequent AC power supply 6.According to using needs, LED can arrange and be the substrate plane of line strip, pattern or arbitrary shape, and carrier 5 can adopt hard carrier, as being the plate, bar etc. of base material with the copper foil laminate, also can adopt the soft carrier that can bend to different shape, as rubber slab, bar etc.; Shell also can adopt the lampshade of the various moulding beyond the fluorescent tube 3.The utility model is because of having water resistance, and in the present embodiment, the end cap 2 of fluorescent tube 3 ports need not adopt harsh seal approach such as the sealing cap that is provided with hermetically-sealed construction and filling with sealant as existing LED lamp, need only simply fill in to get final product.

Fig. 2 is the circuit theory diagrams of the midfrequent AC power supply of the utility model connecting band negative-feedback circuit, as seen from the figure each LED two pins with any direction not polarity be connected in parallel on the power line 1, power line 1 is connected to midfrequent AC power supply 6.Midfrequent AC power supply 6 is to adopt a kind of midfrequent AC power supply with negative-feedback circuit of the prior art, wherein diode D1～D4 and capacitor C 3, C4 form current rectifying and wave filtering circuit, R1 is an insurance resistance, when short trouble appears in circuit inside, is cut off the electricity supply because of burning automatically; Triode VT1, VT2 and capacitor C 1, C2, resistance R 2-R7, coil L1, L2 constitute the push-pull type oscillating circuit; Resistance R 2 and R4 are respectively the biasing resistances of triode VT1, VT2; Resistance R 3, R5 are current-limiting resistance, are respectively applied for to prevent to burn out when exciting current is excessive triode VT1, VT2; Resistance R 6 and R7 are negative feedback resistor, and the level of drive is had certain automatic control action; Can to triode VT1, VT2 the certain protection effect be arranged respectively; Capacitor C 1 and C2 are coupling electric capacity, and ac-excited voltage is added to respectively between triode VT1, VT2 base stage and the emitter stage; Diode D5 and D6 can conductings when reverse energization voltage is excessive, are respectively applied for to prevent that triode VT1, VT2 emitter junction are breakdown; Coil L3 and L4 and magnetic core are formed isolated form step-down transformer T, and the midfrequent AC voltage of 2～3V is provided for LED is luminous.

The parallel LED lamp of the Alternating Current Power Supply water proof type operation principle that the utility model provides is as follows:

The 220V electric main is through diode D1～D4 bridge rectifier, again after capacitor C 3 and C4 filtering and dividing potential drop, for above-mentioned push-pull type oscillating circuit provides operate as normal required DC voltage.During oscillating circuit work, because triode VT1, VT2 alternate conduction, so make by the sense of current among the coil L3 to change repeatedly, it is 30KHz～60KHz that the choose reasonable component parameters can make power frequency, after insulate step-down transformer T provides the midfrequent AC voltage of 2～3V for load LED lamp.When load short circuits, negative-feedback circuit quits work power supply, and unlikely burning realized short circuit self-protection.

In the utility model, LED connects arbitrarily, but no matter its polarity is in full accord or inconsistent, because the frequency of midfrequent AC power supply is between 30KHz～60KHz, although to every pipe is that interruption is glittering, but the visual effect to LED is the stabilized illumination of no stroboscopic, and people's eyes are not had injury.In case load short circuits occurs, LED stops luminous, after the unshorting fault, and the automatic extensive work of power supply, LED is luminous.In addition, because LED is connected in parallel, LED lamp band can be accomplished the shearing of random length, and indivedual LED damage does not influence whole lamp illumination effect; Low-voltage is directly powered, and is difficult for producing puncturing; The LED pin is connected in parallel on the power line with any direction, and is easy to process; LED can reliably working in water.

Claims

1, the parallel LED lamp of a kind of Alternating Current Power Supply water proof type, comprise the LED lamp band that constitutes by some interconnective LED, LED lamp band is connected to power supply by power line, it is characterized in that described each LED two pins is connected in parallel on the power line with any direction, and power line is connected to the midfrequent AC power supply.

2, the parallel LED lamp of a kind of Alternating Current Power Supply water proof type according to claim 1 is characterized in that described midfrequent AC power supply is that frequency is that 30KHz～60KHz, bringing onto load output voltage are 2～3V and the midfrequent AC power supply that is provided with negative-feedback circuit.

3, the parallel LED lamp of a kind of Alternating Current Power Supply water proof type according to claim 1 and 2 is characterized in that described LED lamp band is provided with the carrier that is fixed.