CN201827728U

CN201827728U - Standby alternating-current LED (light emitting diode) lamp filament and illuminating lamp

Info

Publication number: CN201827728U
Application number: CN2010205862543U
Authority: CN
Inventors: 张波; 张桂东; 眭永明; 张雪霁; 巢时斌; 肖文勋; 丘东元
Original assignee: South China University of Technology SCUT
Current assignee: South China University of Technology SCUT
Priority date: 2010-11-02
Filing date: 2010-11-02
Publication date: 2011-05-11
Anticipated expiration: 2020-11-02

Abstract

The utility model provides a standby alternating-current LED (light emitting diode) lamp filament and an illuminating lamp. The standby alternating-current LED lamp filament comprises two LED module rows which are arranged side by side and opposite in conducting directions. Each LED module is formed by the following processes: firstly, a Zener diode is connected with a standby LED in series, and secondly, a serial-connection branch is connected with a main LED in parallel in the same direction. The utility model also provides an LED illuminating lamp adopting the lamp filament. In the utility model, the Zener diode and the standby LED are connected in series and then connected on the main LED in parallel, therefore, once certain main LED of one group is cut off, the serial-connection branch connected on the main LED in parallel provides a passage for the LED, even through the main LED losing efficacy does not emit light any more, the Zener diode on the serial-connection branch is conducted, the standby LED substitutes for the main LED to work normally, and other main LEDs connected with the main LED in series can still go on working, and the whole circuit is not influenced.

Description

A kind of standby type AC LED filament and illuminating lamp

Technical field

The utility model relates to the LED lighting apparatus, is specifically related to a kind of standby type AC LED filament and illuminating lamp.

Background technology

Traditional AC LED lamp, as shown in Figure 1, after the light emitting diode inverse parallel that two row series connection quantity are equal, directly use the power frequency AC-powered, can save dc source and drive, reduce cost, in addition because alternating current makes this two row light emitting diode alternate conduction, thereby make it have the regular hour to reduce junction temperature of light emitting diode, improve lifetime of LED, thereby improve lamp life.But there is such problem in this circuit, in case a light-emitting diode open-circuit in any row in the inverse parallel lost efficacy, will cause whole loop to be lost efficacy, and crash rate is single led several times, and multiple is series connection progression.Fig. 2 is a kind of modified AC LED structure, when the LED of sense of current lamp open circuit damages, the LED of these other series connection of direction is by the LED reverse leakage current conducting of another sense of current, and obviously because the LED reverse leakage current is very little, the luminosity of LED is restricted.Therefore also need better scheme for the reliability that improves integrated circuit.

In order to address the above problem, the utility model can provide a kind of standby type AC LED filament, as shown in Figure 3, realizes directly that by the circuit that designs a kind of LED of change connection the electrical network industrial frequency AC drives.

The utility model content

The purpose of this utility model is to overcome the deficiency that the problems referred to above bring, and a kind of standby type AC LED filament and illuminating lamp are provided, and the utility model is achieved through the following technical solutions.

A kind of standby type AC LED filament comprises the opposite light-emitting diode (LED) module row of two row conducting directions that are connected in parallel, and each light-emitting diode (LED) module is listed as by several identical light-emitting diode (LED) modules of quantity and is in series; Each light-emitting diode (LED) module is formed in parallel with primary LED after being connected by a same standby light emitting diode of Zener diode again.

In addition, in the above-mentioned standby type AC LED filament, in the described light-emitting diode (LED) module, the anode of Zener diode connects with the anode of standby light emitting diode; The negative electrode of Zener diode links to each other with the anode of primary LED, and this end points is the anode of light-emitting diode (LED) module; The negative electrode of standby light emitting diode links to each other with the negative electrode of primary LED, and this end points is the negative terminal of light-emitting diode (LED) module.

Described standby light emitting diode can comprise more than one light emitting diode; Described primary LED can comprise more than one light emitting diode.

The utility model also provides a kind of AC LED lighting lamp, comprises ac input end and is connected AC LED filament between the ac input end, and described AC LED filament is the standby type AC LED filament.

Compared with prior art, advantage of the present utility model and beneficial effect are:

After adopting the series connection earlier of Zener diode and standby light emitting diode, be connected in parallel on above the primary LED again: in case wherein one group some main LED has opened circuit, the series arm that is connected in parallel on above it provides path for it, main LED was no longer luminous although should lose efficacy, Zener diode on the series arm is with conducting, standby LED will substitute main LED and continue operate as normal, and other main LED that connect with main LED still can work on, and integrated circuit is not exerted an influence.

Description of drawings

Fig. 1 is conventional AC LED filament connecting circuit figure.

Fig. 2 improves back AC LED filament connecting circuit figure through Fig. 1.

Fig. 3 is a kind of standby type AC LED filament of the utility model embodiment.

Fig. 4 is a kind of AC LED lighting lamp that a kind of standby type AC LED filament shown in Figure 3 is formed.

The specific embodiment

Below in conjunction with accompanying drawing concrete enforcement of the present utility model is further described, but enforcement of the present utility model and protection domain are not limited thereto.

Fig. 1 is conventional AC LED filament connecting circuit figure.There is such problem in this circuit, in case a light-emitting diode open-circuit in any row in the inverse parallel lost efficacy, will cause whole loop to be lost efficacy, and crash rate is single led several times, and multiple is series connection progression.

Fig. 2 after improving through Fig. 1, adopts latticed array structure to damage AC LED filament connecting circuit figure with the open circuit of tackling indivedual LED in the LED of same sense of current lamp.

Fig. 3 is a kind of circuit diagram of standby type AC LED filament, comprise the opposite light-emitting diode (LED) module row (1 and 2) of two row conducting directions that are connected in parallel, be different from general light emitting diode, each light-emitting diode (LED) module by 5 same standby light emitting diode 4 series connection of a Zener diode, is formed in parallel series arm and primary LED 3 earlier again.

Fig. 4 has provided a kind of AC LED lighting lamp of the utility model embodiment, comprises ac input end AC, capacitor C and is connected AC LED filament between the ac input end, and described AC LED filament adopts the structure described in Fig. 3.Capacitor C wherein has the dividing potential drop effect, in addition, and when parameter selects can play when appropriate the effect of current limliting.

Operation principle: after adopting the series connection earlier of Zener diode and standby light emitting diode, be connected in parallel on above the primary LED again: in case wherein one group some main LED has opened circuit, the series arm that is connected in parallel on above it provides path for it, main LED was no longer luminous although should lose efficacy, Zener diode on the series arm is with conducting, standby LED will substitute main LED and continue operate as normal, and other main LED that connect with main LED still can work on, and integrated circuit is not exerted an influence.

Claims

1. a standby type AC LED filament comprises the opposite light-emitting diode (LED) module row (1,2) of two row conducting directions that are connected in parallel, and it is characterized in that: each light-emitting diode (LED) module is listed as by several identical light-emitting diode (LED) modules of quantity and is in series; Each light-emitting diode (LED) module is formed in parallel with primary LED (3) after by the series connection of a Zener diode (5) and standby light emitting diode (4) again.

2. a kind of standby type AC LED filament according to claim 1 is characterized in that: in the light-emitting diode (LED) module, the anode of Zener diode (5) connects with the anode of standby light emitting diode (4); The anode of the same primary LED of negative electrode (3) of Zener diode (5) links to each other, and this end points is the anode of light-emitting diode (LED) module; The negative electrode of the same primary LED of negative electrode (3) of standby light emitting diode (4) links to each other, and this end points is the negative terminal of light-emitting diode (LED) module.

3. a kind of standby type AC LED filament according to claim 1 is characterized in that described standby light emitting diode (4) comprises more than one light emitting diode.

4. according to each described a kind of standby type AC LED filament of claim 1 ~ 3, it is characterized in that described primary LED comprises more than one light emitting diode.

5. AC LED lighting lamp comprises ac input end and is connected AC LED filament between the ac input end that it is characterized in that: described AC LED filament is the described standby type AC LED filament of claim 1.