Embodiment
Based on accompanying drawing, specific embodiment of the utility model is further elaborated below.Should be appreciated that specific embodiment described herein is only as embodiment, and be not used in restriction protection range of the present utility model.
Refer to Fig. 1, the circuit theory diagrams of its a kind of LED lamp 100 provided for the utility model.Described LED lamp 100 comprises at least one lamp body 10, and the switch 20 of this lamp body 10 of control.It is envisioned that when the use occasion of described LED lamp 100 be not suitable for multiple lamp body 10 interconnected time, this LED lamp 100 can also comprise at least one deconcentrator 30.Be understandable that in addition, described LED lamp 100 also comprises other function element such as power supply.
Described lamp body 10 comprises two-way power input 11,12, one tunnel control signal input 13, at least one is connected on the LED load 14 between described two-way power input, and one is connected on described control signal input 13 and the control switch module 15 in a low level road in two-way power input 11,12.It is understood, however, that described lamp body 10 also comprises some other Functional Unit device, as circuit board, wire etc., its technology known by those skilled in the art, does not repeat them here.
Described two-way power input 11,12 is for providing electric power for described LED load 14, and it is electrically connected by wire and LED load 14, thus forms loop.Described two-way power input 11,12 Zhong mono-road input is high level, and another road then becomes low level after LED load 14.In the present embodiment, described power input 11 is high level, and power input 12 is low level.
Described control signal input 13 for inputting light fixture control signal for described LED lamp 100, for controlling the parameter such as switch, brightness of described LED load 14.
Described LED load 14 is for being electrically connected at least one LED between described two-way power input 11,12.The solid-state semiconductor device of described LED (Light Emitting Diode) lamp to be a kind of can be by electric energy conversion visible ray, it directly can be converted into luminous energy electricity.LED itself is prior art for a person skilled in the art, no longer describes in detail.The resistance pole of this LED load 14 should be connected with the high level end of power input 11,12, and namely power input 11 connects, and negative electrode should be connected with low level end, and namely power input 12 connects.Described LED load 14 can comprise many groups, and each organizes the LED of all equal numbers.Be arranged in parallel between each group, and be arranged in series between LED in each group.
Described lamp body 10 also comprises a counnter attack module 16.Described counnter attack module 16 connects instead for preventing the input of power input 11,12, terminate to power input 12, and low level end is linked on power input 11 by high level, causes burning described LED load 14.In the present embodiment, described counnter attack module 16 is a diode D1.The anode of this diode D1 is identical with the connection of negative electrode with the positive level of LED load 14 with the connection of negative electrode, thus this LED load 14 can be avoided to be burnt.
Described control switch module 15 controls LED load 14 for the input signal according to control signal input 13, namely controls the operating state of described LED load 14, i.e. the parameter such as switch, brightness.Simultaneously due to the reason of described control principle, namely the pwm signal of certain duty ratio changes between high level and low level, when only having this control switch module 15 to be arranged on low level end, described pwm signal just can load with on it, to reach the object controlling to export.Described control switch module 15 can be a metal-oxide-semiconductor, also can be the control module combined by triode and some other auxiliary element.In the present embodiment, described control switch module 15 is a metal-oxide-semiconductor.Grid and the control signal input 13 of described metal-oxide-semiconductor are electrically connected, and source electrode and power input 12 are electrically connected, and drain electrode is connected with the negative pole of LED load 14.When the grid of described metal-oxide-semiconductor is high level, described metal-oxide-semiconductor is by conducting, and the also conducting of described lamp body 10, described LED load 14 is started working thus sends light.And when the grid of metal-oxide-semiconductor is low level, described metal-oxide-semiconductor will be closed, thus described LED load 14 is cut off, and then described LED is closed, thus reach the object of the switch controlling described lamp body 10.And when control signal input 13 input signal be one there is the PWM square-wave signal of certain duty ratio time, the output of described metal-oxide-semiconductor also will be a value changed, namely its power exported is a few percent of rated power, therefore can reach the object of the brightness regulating lamp body 10.Described control switch module 15 also comprises two protective resistance FV2, FV3, and these two protective resistance FV2, FV3 are electrically connected at grid and source electrode respectively, and between drain electrode and source electrode.These two protective resistance FV2, FV3 can be all piezo-resistance.Simultaneously for preventing noise from entering into described metal-oxide-semiconductor, between described control signal input 13 and the grid of metal-oxide-semiconductor, be also in series with an isolation resistance R1.This isolation resistance R1 is used for avoiding making described noise enter into control switch module.
When described control switch module 15 comprises described MOS, described lamp body 10 also comprises two resistance R2 be connected between described two-way power input 11,12, R3.Described control signal input 13 is electrically connected between two resistance R2, R3.The existence of these two resistance R2, R3, make when described control signal input 13 does not input, the grid of described metal-oxide-semiconductor also can be made to remain on high level, and namely described lamp body 10 remains on conducting state.Even if thus when making this LED lamp 100 there is no a switch control rule, also can conducting.And when described control signal input 13 has the PWM square-wave signal input of certain duty ratio, the change with this PWM square-wave signal changes again by the level of the grid of described metal-oxide-semiconductor, and then can control the parameter such as switch, brightness of described LED lamp 100.
Described lamp body 10 also comprises an interconnected output 17.This interconnected output 17 is electrically connected at for interconnected another one lamp body on two-way power input 11,12, thus can be interconnected at together by multiple lamp body 10 as required, increases the use length of LED lamp 100.Be understandable that, described interconnected output 17 also comprises three outputs, i.e. two-way power output end, and a kind of control signal output.Described two-way power output end is connected with the power input 11,12 of another lamp body 10, and control signal output 13 is connected with the control signal input 13 of another lamp body 10.
As shown in Figure 2, it is a kind of circuit diagram controlling the switch 20 of described LED lamp 100.This switch 20 comprises a switching signal output 21.This switching signal output 21 is electrically connected with the control signal input 13 of lamp body 10, thus can control the object of the operating state of described lamp body 0 by operating this switch 20.This switch 20 can be arranged in LED lamp 100, also can be arranged on described deconcentrator 30.Described switch 20 can soft-touch control, infrared switch, or even wireless switching etc.In the present embodiment, described switch 20 is soft-touch control.
As shown in Fig. 3 A to Fig. 3 D, described deconcentrator 30 is for being electrically connected multiple described lamp body 10.Described deconcentrator 30 can be used in when multiple lamp body 10 or multiple interconnected after lamp body 10 can not be completed the situation of lamp installation again by mutual contact mode, its technology known by those skilled in the art.But it should be noted is that, the inside of described deconcentrator 30 also necessarily has the device for the control signal input 13 with the switching signal output 21 of switch 20 being electrically connected described lamp body 10, as wire etc.
Consult Fig. 3 A to Fig. 3 D again, in use, described switch 20 can be set directly on lamp body 10, as the end of incoming cables of lamp body 10, or end, as Fig. 3 A and Fig. 3 C.Also can be arranged on described deconcentrator 30, as Fig. 3 B and Fig. 3 D, or even by wire, described lamp body 10 can also be together in series with switch 20.
Compared with prior art, because described lamp body 10 has control signal input 13 and control switch module 15, described when the switching signal output 21 of switch 20 is electrically connected with this control signal input 13, namely can control the parameters such as the break-make of described LED lamp 100 and brightness.Simultaneously, this switch 20 can be arranged on any position of LED lamp 100, as the end of lamp body 10, on deconcentrator, or between two interconnected lamp bodies 10, as long as be electrically connected with this control signal input 13 by the switching signal output 21 of switch 20, thus convenient installation can be reached, the object using, control.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all do in the spirit and principles in the present invention any amendment, equivalent to replace and improvement etc., all should be included within protection scope of the present invention.