CN101534588A

CN101534588A - Method of using AC to directly drive ordinary LED

Info

Publication number: CN101534588A
Application number: CN200910046045A
Authority: CN
Inventors: 陆敬仁
Original assignee: 陆啸天
Priority date: 2009-02-10
Filing date: 2009-02-10
Publication date: 2009-09-16

Abstract

A method of using AC to directly drive ordinary LED is composed of a unique circuit and then utilizes the special physical property of visual persistence of human eyes, so that using AC to directly drive ordinary LED becomes possible.

Description

A kind of method with AC to directly drive ordinary LED

Technical field

Electronic technology.

Background technology

LED is progressively substituting existing lighting source, lighting with existing lighting source composition, basically be directly to drive work with electric main, and common LED can only come driven for emitting lights with direct current, therefore to be provided with driving power at communication power supply and LED inter-module indispensably, its inconvenience is arranged.Therefore abroad, existing people directly comes the AC LED of driven for emitting lights with alternating current in research and development, generally uses than difficulty yet involve great expense, and also can't see the luminous precedent of LED with AC to directly drive ordinary.

Therefore, it is luminous directly to drive common LED without driving power with electric main, just becomes the technical goal that people pay close attention to pursuit.

Summary of the invention

The present invention is intended to change common LED can not directly come driven for emitting lights simply with alternating current present situation, creates a kind of method, need only change being electrically connected of LED simply, just can reach the luminous purpose of LED with AC to directly drive ordinary.

The technical solution adopted in the present invention is: utilizes the persistence of vision physiological property of human eye, simply changes the connecting mode of LED, and just can be luminous with the LED of AC to directly drive ordinary.

Now technical scheme is described with the simplest circuit design.

At first, the whole LED circuit is to be formed in parallel by minimum two series arms, and the contained LED of each a series arm number has two and will equate at least.

Two LEDs in one tunnel series arm wherein, positive pole links, two LEDs in another road series arm, and negative pole links, then these two series arm parallel connections.

In addition with the positive and negative sudden strain of a muscle branch road that disappears that is linked into of two LEDs, the positive pole that negative terminal and above two positive poles of this branch road are linked links again, and the negative pole that anode and above two negative poles link links, and makes entire circuit become a bridge arrangement.

At last, a parallel connected end of above bridge circuit in parallel is directly linked with an Alternating Current Power Supply end, another parallel connected end links by resistance and another Alternating Current Power Supply end of a Control current size, and whole proposal is finished.

The working condition of this scheme is such: at positive half cycle of alternating current or negative half period, disappear and dodge two LEDs Chang Liang of branch road, two one group frequency of pressing 50HZ or 60HZ is alternately luminous in four LEDs in two series arms, because the physilogical characteristics that human eye vision persists.In whole ac period, it is only continuous that human eye is seen, but because 50HZ or 60HZ frequency are lower, some color break-up, two LEDs that dodge branch road of disappearing are all luminous at positive and negative two half cycles, play a part to eliminate the color break-up sense, just make human eye perceives less than having flashed.

Like this, just realized with the LED of AC to directly drive ordinary luminous.

Description of drawings

The present invention is further described below in conjunction with drawings and Examples.

Fig. 1 is a ball bearing made using schematic diagram of the present invention.

Fig. 2 is the current direction figure of the present invention when the positive half cycle of interchange is powered.

Fig. 3 is the current direction figure of the present invention when exchanging the negative half period power supply.

Fig. 4 is the circuit diagram of one embodiment of the invention.

1. exchange input among the figure, 2. one tunnel series arm, and 3. another road series arm, the sudden strain of a muscle branch road that 4. disappears, 5. control leakage resistance, A. parallel circuits one end, the B. parallel circuits other end, C. disappear and dodge the branch road negative terminal, and D. disappears and dodges the branch road anode.

Embodiment

Common LED has been joined circuit by Fig. 1, at A, B two ends incoming transport

Among Fig. 2, when the positive half cycle of interchange input was powered, current direction was A-D-C-B, and the LED on AD, DC, the CB section is luminous;

Among Fig. 3, when exchanging the power supply of input negative half period, current direction is B-D-C-A, and the LED on BD, DC, the CA section is luminous.

Like this, in whole ac cycle, the LED on AD, CB and BC, the DA section is alternately luminous, DC section LED Chang Liang, and in people's eye, whole LED combination presents continuously, normally luminous, like this, realized with the LED of AC to directly drive ordinary luminous.

Fig. 4 shows the embodiment of 24 o'clock fluorescent lamp internal circuits of a practicality.

18 highlighted white light LEDs of common small-power of AD section forward series connection among the figure, 17 highlighted white light LEDs of common small-power of CB section forward series connection, 18 highlighted white light LEDs of common small-power of CA section forward series connection, 17 highlighted white light LEDs of common small-power of BD section forward series connection, 34 highlighted white light LEDs of common small-power of DC section forward series connection, 1 680 Ohmic resistance of A end series connection inserts an end of 220 volts of alternating currents, 1 680 Ohmic resistance of B end series connection inserts the other end of 220 volts of alternating currents, just forms an inside way circuit that directly drives 24 o'clock LED fluorescent lamps of 4 watts of power consumptions at 220 volts of alternating currents.

Claims

1. the method with AC to directly drive ordinary LED is the circuit structure of a kind of LED, it is characterized in that: one tunnel series arm (2), another road series arm (3), the sudden strain of a muscle branch road (4) that disappears are formed bridge circuit, with control leakage resistance (5) control branch current.

2. a kind of method with AC to directly drive ordinary LED according to claim 1, it is characterized in that: one tunnel series arm (2), another road series arm (3), the bar number of series arm becomes the even number bar.

3. a kind of method according to claim 1 with AC to directly drive ordinary LED, it is characterized in that: one tunnel series arm (2), another road series arm (3), at least two of the numbers of LED in every series arm, the number of LED equates in each bar series arm.

4. a kind of method according to claim 1 with AC to directly drive ordinary LED, it is characterized in that: one tunnel series arm (2), another road series arm (3), LED in half series arm, elder generation's forward series connection, follow LED in differential concatenation, second half series arm, elder generation's differential concatenation, then forward series connection.

5. a kind of method with AC to directly drive ordinary LED according to claim 1 is characterized in that: disappear and dodge branch road (4), be made of a LEDs at least, series arm is unified into bridge circuit.

6. a kind of method with AC to directly drive ordinary LED according to claim 1 is characterized in that: control leakage resistance (5).