TW201414348A - Full-domain linear LED driving circuit capable of resolving flicker - Google Patents

Abstract

The present invention is a full-domain linear LED driving circuit capable of resolving flicker, which comprises: a power loop composed of a regulating unit, an LED unit and a constant-current controller; a flicker eliminating circuit with an energy storing capacitor; at least a series-parallel voltage divider having a voltage dividing capacitor; and a voltage-division controller, wherein the flicker eliminating circuit is connected between the LED unit and a grounding end, and the series-parallel voltage divider can work under a series mode and a parallel mode. Said series mode is to connect the voltage dividing capacitor in series with the aforementioned power loop while the parallel mode to connect the voltage dividing capacitor in parallel with the flicker eliminating circuit. Furthermore, the voltage-division controller is to detect impulse DC power outputted from the regulating unit and control the series-parallel voltage divider to work under the series mode or the parallel mode according to a voltage safety regulation value.

Description

Decodeable global linear LED driver circuit

The invention relates to a linear LED driving circuit, in particular to a global linear LED driving circuit capable of de-flashing.

The AC power system is currently the most common power transmission and distribution method on the market. The reason is that it is much more efficient to transmit power through AC transmission than to transmit power through DC. However, the current AC power supply has different voltage specifications; In other words, the above AC power supply usually has a voltage value between 100 volts and 240 volts.

Light Emitting Diode (LED) is a common lighting appliance currently on the market, which has higher luminous efficiency, low power consumption and low pollution compared with traditional incandescent bulbs; however, due to the LED itself It can only be used in a single pass, so it is difficult to use the AC power that is widely used at present; for this reason, the industry has developed a linear LED drive circuit; as shown in Figure 9, the existing linear LED drive circuit includes: The rectifying unit 80 is connected to an AC power source AC/IN, and converts the AC power source AC/IN into a pulsating DC power source; an LED unit 81 is serially connected to the rectifying unit 80 and includes a plurality of LED light sources. And a certain current controller 82 is connected in series to the LED unit 81 and constitutes a power supply circuit; wherein the constant current controller 82 fixes the current flowing through the LED unit 82 to a fixed value.

According to the above structure, the existing linear LED driving circuit is After the AC unit converts the AC power source AC/IN into a pulsating DC power source, the current flowing through the LED unit 81 is fixed by the constant current controller 82 to stabilize the LED unit 81.

However, due to the different voltage specifications of the AC power supply AC/IN currently used in countries around the world, different voltage transformers must be used to convert and output the voltage values of different AC power sources AC/IN to the same. DC voltage and normal use of existing linear LED driver circuits.

However, as a result, existing linear LED driver circuit manufacturers must prepare linear LED driver circuits for different voltages and use their transformers for voltage reduction; however, the transformer is basically the same size as general electronics. The size of the component is large, so it is easy to cause the storage pressure of the manufacturer; in addition, the consumer must also confirm that the purchased AC drive circuit meets the voltage specifications of the country when purchasing, when buying the linear LED driver circuit of the low voltage section Set to AC high voltage AC/IN in high voltage section, which will cause damage.

In addition, since the existing linear LED driving circuit must have the voltage difference across the LED unit 81 greater than its junction voltage value to enable it to emit light, if the instantaneous voltage of the pulsating DC power source is less than the junction voltage value thereof, The LED unit 81 is turned off, which in turn causes the LED unit to generate a flicker.

Therefore, in summary of the above, it is necessary to further propose a better solution to the above situation.

In view of the existing linear LED driver circuit, the power supply is applicable as well The problem of flash frequency; therefore, the main object of the present invention is to provide a global linear LED driving circuit capable of de-flashing.

The main technical means used to achieve the above purpose is to enable the stroboscopic full-range linear LED driving circuit, which comprises: a rectifying unit connected to an alternating current power source and converting the alternating current power source into a pulsating direct current a power unit; an LED unit is connected in series to the rectifying unit and includes a plurality of LED light sources; a certain current controller is connected in series between the LED unit and a ground end, and constitutes a power circuit; The current controller fixes the current flowing through the power circuit to a certain value; a flash frequency eliminating circuit is connected between the LED unit and the ground, and includes a storage capacitor and a series of the storage capacitors Controlling the transistor; wherein the control cell system acts as a switch to control the presence or absence of a current flowing through the storage capacitor; at least a series of parallel voltage dividers are connected between the rectifying unit and the LED unit and have a series mode And a parallel mode, and comprising a voltage dividing capacitor; wherein the series mode is configured to connect the voltage dividing capacitor between the rectifying unit and the LED unit, and the parallel mode makes the voltage dividing capacitor Connected to the flash frequency eliminating circuit; and a voltage dividing controller having a built-in voltage safety value and connected to the rectifying unit and the at least one series of parallel voltage dividers and the control transistor; wherein the voltage dividing control The device detects the voltage value of the pulsating DC power source output by the rectifying unit; and when the voltage value of the pulsating DC power source exceeds the voltage safety value, the serial voltage divider is controlled to be in series mode, and the control transistor is controlled The body is turned off; otherwise, the string-type voltage divider is controlled to be in parallel mode, and the control transistor is turned on.

The present invention further achieves the above object by another main technical means, that is, the stroboscopic full-range linear LED driving circuit includes: a rectifying unit connected to an alternating current power source, and converting the alternating current power source into a pulsating DC power supply; an LED unit is connected in series to the rectifying unit and includes a plurality of LED light sources; a certain current controller is connected in series between the LED unit and a grounding end, and constitutes a power supply circuit; The constant current controller fixes the current flowing through the power supply circuit to a certain value; a flash frequency cancellation circuit is connected between the LED unit and the ground end, and includes a storage capacitor and a series of the storage a control transistor for a capacitor; wherein the control transistor system acts as a switch to control the presence or absence of a current flowing through the storage capacitor; at least a series of parallel voltage dividers are coupled between the LED unit and the constant current controller And having a series mode and a parallel mode, and including a voltage dividing capacitor; wherein the series mode is configured to connect the voltage dividing capacitor between the LED unit and the constant current controller, and the parallel mode The voltage dividing capacitor is connected in parallel to the flash frequency eliminating circuit; and a voltage dividing controller is internally provided with a voltage safety value, and is connected to the rectifying unit and the control transistor, and is connected with a switch and a constant current transistor. And the switch and the constant current transistor have one end connected to the series node between the LED unit and the at least one series of parallel voltage dividers, and the other end is connected to a ground through a resistor, and the control end thereof Connection from the above partial pressure a controller; wherein the voltage dividing controller detects a voltage value of the pulsating DC power source output by the rectifying unit; and when the voltage value of the pulsating DC power source exceeds the voltage safety value, the switch and the constant current transistor are turned off. The series-parallel voltage divider is in series mode, and the control transistor is turned off; otherwise, the switch and the constant current transistor are controlled to be turned on to make the serial-parallel voltage divider in parallel mode, and the control transistor is turned on. .

According to the above structure, the present invention transmits the voltage value of the pulsating DC power supply to the voltage dividing capacitor through the series mode, thereby reducing the voltage across the constant current controller. Further, the present invention can be applied to a higher voltage; and the parallel voltage mode causes the voltage dividing capacitor to charge the storage capacitor of the flash cancellation circuit; and at the same time, the storage capacitor of the flash cancellation circuit is connected to Between the LED unit and the grounding end, when the instantaneous voltage of the pulsating DC power source is less than the junction voltage value of the LED unit, the energy storage capacitor of the strobe eliminating circuit directly discharges the LED unit; thereby providing A steady current is given to the LED unit so that the LED unit does not experience a flicker phenomenon.

Referring to FIG. 1 , it is a first embodiment of a global linear LED driving circuit capable of de-flashing according to the present invention, comprising a rectifying unit 10 , an LED unit 11 , a constant current controller 12 , and a flash frequency eliminating circuit 20, at least one string of parallel voltage divider 30 and a voltage divider controller 40, wherein: the rectifier unit 10 is connected to an AC power source AC / IN, and the AC power source AC / IN is converted into a pulsed DC power supply; In this embodiment, the rectifying unit 10 is a full-wave rectifier.

The LED unit 11 is connected in series to the rectifying unit 10 and includes a plurality of LED light sources.

The constant current controller 12 is connected in series between the LED unit 11 and a ground terminal, and constitutes a power circuit; wherein the constant current controller 12 fixes the current flowing through the power circuit to a certain value; In an embodiment, the constant current controller 12 includes a voltage control transistor 13 , a current detecting unit 14 connected in series with the voltage control transistor 13 , and an electrical connection to the voltage control transistor 13 and the current detection. The current control unit 15 of the unit 14 is connected to the LED unit 11 in series with the current detecting unit 14; and the current detecting unit 14 detects the current flowing through the power circuit. And transmitting, by the low frequency filter 16, the detected current signal to the steady current control unit 15; and the steady current control unit 15 is configured to pass the control voltage through the voltage control transistor 13 according to the current signal. The current in the loop maintains the current in the power loop stable.

The flashing frequency eliminating circuit 20 is connected between the LED unit 11 and the grounding end, and includes a storage capacitor 21 and a control transistor 22 connected in series with the storage capacitor 21; wherein the control transistor 22 is used as The switch controls the presence or absence of current flowing through the storage capacitor 21.

The at least one series of parallel voltage dividers 30 are connected between the rectifying unit 10 and the LED unit 11, and have a series mode and a parallel mode, and include a voltage dividing capacitor 31; wherein the series mode makes the voltage dividing The capacitor 31 is connected in series between the rectifying unit 10 and the LED unit 11, and the parallel mode causes the voltage dividing capacitor 31 to be connected in parallel with the flash eliminating circuit. In this embodiment, the voltage dividing capacitor 31 has a positive And the at least one series of parallel voltage dividers 30 further comprising: A control diode 32 is connected in series to the voltage dividing capacitor 31 and includes an anode and a cathode; wherein the anode of the control diode 32 is connected to the negative terminal of the voltage dividing capacitor 31; a selection switch 33 One end is connected to the positive end of the voltage dividing capacitor 31, and the other end is connected to the LED unit 11; and a switching diode 34 includes an anode and a cathode, and the cathode is connected to the branch A series connection between the piezoelectric capacitor 31 and the control diode 32 is connected to the ground terminal.

The voltage dividing controller 40 is internally provided with a voltage safety value V _F and is connected to the rectifying unit 10, the at least one series of parallel voltage dividers 30 and the control transistor 22; wherein the voltage dividing controller 40 detects measuring the output of the rectifying unit 40 pulsed DC power voltage value V _dc; and when the above voltage value V _dc pulsed DC power exceeds the safe voltage value V _F of the string and the control line 30 to divider-line mode, and The control transistor 22 is turned off; otherwise, the serial-type voltage divider 30 is controlled to be in a parallel mode, and the control transistor 22 is turned on: in the embodiment, the voltage dividing controller 40 is connected to the at least a selection switch 33 of the parallel voltage divider 30, and when the voltage value V _{dc of} the pulsating DC power supply is greater than the voltage safety value V _F , the selection switch 33 is controlled to assume an off state; otherwise, the selection switch 33 is controlled to be presented. On state.

Referring to FIG. 2, it is a preferred first embodiment of the present invention, and its structure is substantially the same as that of the first embodiment; however, the difference is that in this embodiment, the system further includes a plurality of strings and is divided into two parts. Pressure vessel 30.

Referring to FIG. 3 and FIG. 4, it is a specific embodiment of the present invention having two serial-connected voltage dividers 30; and as known from the structure, the present embodiment detects the same through the voltage dividing controller 40. The voltage value V _dc of the pulsating DC power source outputted by the rectifying unit 10 further determines whether the series-connected voltage divider 30 is in a series mode or a parallel mode and whether the control transistor 22 is turned on; when the series-connected voltage divider 30 is When the control transistor 22 is turned off, the voltage dividing capacitor 31 is connected in series to the LED unit 11, so that the voltage value V _dc of the pulsating DC power source is divided into a part of the voltage dividing capacitor 31. To reduce the voltage across the constant current controller 12, and at the same time to charge the voltage dividing capacitor 31; further, when the series parallel voltage divider 30 is in parallel mode and the control transistor 22 is turned on The voltage dividing capacitor 31 is connected in parallel to the flash cancel circuit and the storage capacitor 21 is charged by the voltage dividing capacitor 31.

And because the flash capacitor elimination circuit 20 has its storage capacitor 21 connected between the LED unit 11 and the ground terminal, when the pulsed DC power supply cannot supply the current I _dc to the LED unit 11, the flash cancellation circuit The 20 series directly discharges the LED unit 11 by its storage capacitor 21; thereby providing a stable current to the LED unit 11 so that the LED unit 11 does not cause a flash phenomenon; moreover, due to the control transistor 22 The base body has a reverse junction diode. Therefore, when the storage capacitor 21 is discharged, the storage capacitor 21 can discharge through the reverse junction diode regardless of whether the control transistor 22 is turned on.

Referring to FIG. 5, it is another preferred first embodiment of the present invention, and its structure is substantially the same as that of the first embodiment; however, the difference is that in the embodiment, the switch diode 34 has The anode is connected to the series node between the storage capacitor 21 and the control transistor 22, and is connected to the ground through the storage capacitor 21.

Since the switching diode 34 has its cathode connected to the storage capacitor 21 And a series connection between the control transistor 22; therefore, the voltage dividing capacitor 31 can directly charge the storage capacitor 21 without discharging current through the control transistor 22, thereby reducing power Loss.

Referring to FIG. 6, a first preferred embodiment of the present invention is substantially the same as the other preferred first embodiment; however, the difference is in the embodiment. The control transistor 22 is normally cut off, and a reverse junction diode 23 is formed on the substrate; wherein the reverse junction diode 23 has its cathode connected to the storage capacitor 21 and its anode system The control transistor 22 is connected to the above ground terminal; in addition, the control transistor 22 which is normally cut off and has a reverse junction diode 23 formed on its substrate can be replaced by an actual diode.

Since the anode of the switching diode 34 is connected to the series connection between the storage capacitor 21 and the control transistor 22, the voltage dividing capacitor 31 can directly charge the storage capacitor 21. It is not necessary for the discharge current to flow through the reverse junction diode 23; and at the same time, when the storage capacitor 21 is to be discharged, since the discharge current of the storage capacitor 21 is compliant with the reverse junction The polar body 23; therefore, at this time, the reverse junction diode 23 is turned on, thereby achieving the effect of eliminating the flash frequency.

Referring to FIG. 7 , a second embodiment of the present invention includes a rectifying unit 10 , an LED unit 11 , a constant current controller 12 , a strobe eliminating circuit 50 , and at least one series of parallel voltage dividers 60 . a voltage dividing controller 70, wherein: the rectifying unit 10 is connected to an AC power source AC/IN, and converts the AC power source AC/IN into a pulsating DC power source; in this embodiment, the rectifying unit 10 is A full wave rectifier.

The LED unit 11 is connected in series to the rectifying unit 10 and includes a plurality of LED light sources.

The constant current controller 12 is connected in series between the LED unit 11 and a ground terminal, and constitutes a power circuit; wherein the constant current controller 12 fixes the current flowing through the power circuit to a certain value; In an embodiment, the constant current controller 12 includes a voltage control transistor 13 , a current detecting unit 14 connected in series with the voltage control transistor 13 , and an electrical connection to the voltage control transistor 13 and the current detection. The current control unit 15 of the unit 14 is connected to the LED unit 11 in series with the current detecting unit 14; and the current detecting unit 14 detects the current flowing through the power circuit. And transmitting, by the low frequency filter 16, the detected current signal to the steady current control unit 15; and the steady current control unit 15 is configured to pass the control voltage through the voltage control transistor 13 according to the current signal. The current in the loop maintains the current in the power loop stable.

The flashing frequency eliminating circuit 50 is connected between the LED unit 11 and the grounding end, and includes a storage capacitor 51 and a control transistor 52 connected in series with the storage capacitor 51; wherein the control transistor 52 is The presence or absence of a current flowing through the storage capacitor 51 is controlled as a switch.

The at least one series of parallel voltage dividers 60 are connected between the LED unit 11 and the constant current controller 12, and have a series mode and a parallel mode, and include a voltage dividing capacitor 61; wherein the series mode is The voltage dividing capacitor 61 is connected in series between the LED unit 11 and the constant current controller 12, and the parallel mode causes the voltage dividing capacitor 61 to be connected in parallel to the flash frequency eliminating circuit 50. In this embodiment, the voltage dividing unit The capacitor 61 has a positive end and a negative end; and the at least one series of parallel voltage dividers 60 further includes: A control diode 62 is connected in series to the voltage dividing capacitor 61 and includes an anode and a cathode; wherein the cathode of the control diode is connected to the positive terminal of the voltage dividing capacitor; a selection diode 63 The anode includes a cathode and a cathode, and the anode is connected to the series node between the control diode 62 and the voltage dividing capacitor 61, and the cathode is connected to the series connection between the rectifier unit 10 and the LED unit 11. And a switching diode 64 includes an anode and a cathode, and a cathode is connected to the negative terminal of the voltage dividing capacitor 61, and an anode is connected to the ground.

The voltage dividing controller 70 has a built-in voltage safety value V _F and is connected to the rectifying unit 10 and the control transistor 52, and is connected with a switch and a constant current transistor 71; and the switch and the constant current transistor 71 is connected at one end to a series node between the LED unit 11 and the at least one series of parallel voltage dividers 60, and the other end is connected to a ground through a resistor 72, and the control end is connected from the above pressure controller 70; wherein the lines dividing the controller 70 detects the voltage value V _dc output from rectifying unit 10 of the pulsating DC power source; and the voltage value V _dc when the above-described pulsed DC power exceeds the safe voltage value V _F line Controlling the switch and the constant current transistor 71 to turn off the series-type voltage divider 60 in a series mode; otherwise, controlling the switch and the constant current transistor 71 to be turned on to make the serial-parallel voltage divider 60 in a parallel mode; When the switch and the constant current transistor 71 are turned on, the control voltage thereof is the same as the control voltage of the voltage controlled transistor 13; further, the LED unit 11 maintains a constant current regardless of any input voltage.

Please refer to FIG. 8 , which is a preferred second embodiment of the present invention. The structure is substantially the same as that of the first embodiment; however, the difference is that in this embodiment, the plurality of serial-type voltage dividers 60 are further included.

It can be seen from the above configuration that when the switch and the constant current transistor 71 are turned off, since the selection diode 63 and the switching diode 64 are both reverse biased, the voltage dividing capacitor 61 is connected in series to the structure. Between the LED unit 11 and the constant current controller 12, the voltage value V _dc of the pulsating DC power supply is divided into a part of the voltage dividing capacitor 61 to reduce the voltage on the two ends of the constant current controller 12 Voltage, and at the same time, the voltage dividing capacitor 61 is charged; further, when the switch and the constant current transistor 71 are turned on, since the selection diode 63 and the switching diode 64 are in the forward direction at this time The voltage is biased, so that the voltage dividing capacitor 61 is connected in parallel to the flash cancellation circuit 50 and the storage capacitor is charged by the voltage dividing capacitor 61.

And because the flash capacitor elimination circuit 50 has its storage capacitor 51 connected between the LED unit 11 and the ground terminal, when the pulsed DC power supply cannot supply the current I _dc to the LED unit 11, the flash cancellation circuit The 50 series directly discharges the LED unit 11 by its storage capacitor 51; thereby providing a stable current to the LED unit 11 so that the LED unit 11 does not suffer from a flash phenomenon.

10‧‧‧Rectifier unit

11‧‧‧LED unit

12‧‧‧Constant current controller

13‧‧‧Voltage-controlled transistor

14‧‧‧current detection unit

15‧‧‧ steady flow control unit

16‧‧‧Frequency filter

20‧‧‧Flash cancellation circuit

21‧‧‧ storage capacitor

22‧‧‧Control transistor

23‧‧‧Reverse junction diode

30‧‧‧ Serial-type voltage divider

31‧‧‧Voltage capacitor

32‧‧‧Controlling the diode

33‧‧‧Selection switch

34‧‧‧Switching diode

40‧‧‧voltage controller

50‧‧‧Flash cancellation circuit

51‧‧‧ storage capacitor

52‧‧‧Control transistor

60‧‧‧ Serial-type voltage divider

61‧‧‧Voltage capacitor

62‧‧‧Controlling the diode

63‧‧‧Selecting a diode

64‧‧‧Switching diode

70‧‧‧Voltage controller

71‧‧‧Switch and constant current transistor

72‧‧‧resistance

80‧‧‧Rectifier unit

81‧‧‧LED unit

82‧‧‧ Constant current controller

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a circuit diagram of a first embodiment of a global flash LED drive circuit of the present invention.

Figure 2 is a circuit diagram of a preferred first embodiment of the present invention.

Figure 3 is a circuit diagram of another preferred first embodiment of the present invention.

Figure 4 is a waveform diagram of a preferred first embodiment of the present invention.

Figure 5 is a circuit diagram of another first embodiment of the present invention.

Figure 6 is a circuit diagram of still another first embodiment of the present invention.

Fig. 7 is a circuit diagram showing a second embodiment of the global flashable LED driving circuit of the present invention.

Figure 8 is a circuit diagram of a preferred second embodiment of the present invention.

Figure 9: Circuit diagram of an existing linear LED driver circuit.

10‧‧‧Rectifier unit

11‧‧‧LED unit

12‧‧‧Constant current controller

13‧‧‧Voltage-controlled transistor

14‧‧‧current detection unit

15‧‧‧ steady flow control unit

16‧‧‧Frequency filter

20‧‧‧Flash cancellation circuit

21‧‧‧ storage capacitor

22‧‧‧Control transistor

30‧‧‧ Serial-type voltage divider

31‧‧‧Voltage capacitor

32‧‧‧Controlling the diode

33‧‧‧Selection switch

34‧‧‧Switching diode

40‧‧‧voltage controller

Claims (9)

A global linear LED driving circuit capable of de-flashing, comprising: a rectifying unit connected to an alternating current power source and converting the alternating current power source into a pulsed direct current power source; and an LED unit connected in series to the rectifying The unit includes a plurality of LED light sources; a constant current controller is connected in series between the LED unit and a ground terminal, and constitutes a power circuit; wherein the constant current controller is configured to flow current through the power circuit Fixed to a certain value; a flash frequency cancellation circuit is connected between the LED unit and the ground, and includes a storage capacitor and a control transistor connected in series with the storage capacitor; wherein the control electro-crystal system is used as a switch Controlling the presence or absence of current flowing through the storage capacitor; at least one series of parallel voltage dividers connected between the rectifying unit and the LED unit, and having a series mode and a parallel mode, and including a voltage dividing capacitor; The series mode is configured to connect the voltage dividing capacitor in series between the rectifying unit and the LED unit, and the parallel mode causes the voltage dividing capacitor to be connected in parallel to the flash frequency eliminating circuit; and a voltage dividing control a voltage safety value is built in, and is connected to the rectifying unit and the at least one series of parallel voltage dividers and the control transistor; wherein the voltage dividing controller detects the pulsating DC power output of the rectifying unit a voltage value; and when the voltage value of the pulsating DC power supply exceeds the voltage safety value, the serial voltage divider is controlled to be in series mode, and the control transistor is turned off; otherwise, the serial-type voltage divider is controlled Parallel mode, and The control transistor is turned on. The omnidirectional linear LED driving circuit of claim 1 , wherein: the voltage dividing capacitor has a positive terminal and a negative terminal; and the at least one series of parallel voltage divider further includes: a control a diode connected in series to the voltage dividing capacitor and comprising an anode and a cathode; wherein an anode of the control diode is connected to a negative end of the voltage dividing capacitor; and a selection switch is connected to the anode a positive terminal of the voltage dividing capacitor, and the other end is connected to the LED unit; and a switching diode includes an anode and a cathode, and a cathode is connected between the voltage dividing capacitor and the control diode a series connection node, wherein the anode is connected to the ground; the voltage dividing controller is connected to the selection switch of the at least one series of parallel voltage dividers, and when the voltage value of the pulsating DC power source is greater than the voltage safety value, Controlling the selection switch to assume an off state; otherwise, controlling the selection switch to assume an on state. The de-flashable global linear LED driving circuit of claim 2, wherein the anode of the switching diode is connected to a series node between the storage capacitor and the control transistor, and the storage capacitor is transmitted through the storage capacitor Connect to the ground terminal above. The omnidirectional linear LED driving circuit of claim 3, wherein the control transistor system is normally turned off, and a reverse junction diode is formed on the substrate; wherein the reverse junction 2 The cathode body is connected to the storage capacitor, and the anode is connected to the ground terminal. The de-flashable global linear LED driver circuit of claim 4, the control transistor system being replaceable by an actual diode. The stroboscopic full-range linear LED driving circuit according to any one of claims 1 to 5, wherein the constant current controller comprises: a voltage controlled transistor connected in series to the LED unit; a current detecting unit is connected in series with the LED unit and the voltage controlled transistor, and detects a current flowing through the power circuit; and a steady current control unit electrically connected to the voltage controlled transistor and the current detecting a unit, and reading a current signal detected by the current detecting unit through a low frequency filter; and controlling a current flowing through the power circuit through the voltage control transistor according to the current signal, and maintaining the power circuit The current is stable. A global linear LED driving circuit capable of de-flashing, comprising: a rectifying unit connected to an alternating current power source and converting the alternating current power source into a pulsed direct current power source; and an LED unit connected in series to the rectifying The unit includes a plurality of LED light sources; a constant current controller is connected in series between the LED unit and a ground terminal, and constitutes a power circuit; wherein the constant current controller is configured to flow current through the power circuit Fixed to a certain value; a flash frequency cancellation circuit is connected between the LED unit and the ground, and includes a storage capacitor and a control transistor connected in series with the storage capacitor; wherein the control electro-crystal system is used as a switch Controlling the presence or absence of current flowing through the storage capacitor; At least one series of parallel voltage dividers connected between the LED unit and the constant current controller, and having a series mode and a parallel mode, and including a voltage dividing capacitor; wherein the series mode is the voltage dividing capacitor string Connected between the LED unit and the constant current controller, and the parallel mode causes the voltage dividing capacitor to be connected in parallel with the flash frequency eliminating circuit; and a voltage dividing controller has a built-in voltage safety value and is connected to The rectifier unit and the control transistor are connected to a switch and a constant current transistor; and the switch and the constant current transistor have one end connected to a series node between the LED unit and the at least one series of parallel voltage dividers The other end is connected to a ground through a resistor, and the control terminal is connected to the voltage dividing controller; wherein the voltage dividing controller detects the voltage value of the pulsating DC power source output by the rectifying unit; When the voltage value of the pulsating DC power supply exceeds the voltage safety value, the switch and the constant current transistor are turned off to make the serial-type voltage divider be in series mode, and the control transistor is turned off; otherwise, The system and the constant current switch transistor is turned on so that the voltage divider is connected in parallel and serial mode, and enabling the control transistor is turned on. The omnidirectional linear LED driving circuit of claim 7, wherein: the voltage dividing capacitor has a positive terminal and a negative terminal; and the at least one series of parallel voltage dividers further includes: a control a diode connected in series to the voltage dividing capacitor and comprising an anode and a cathode; wherein a cathode of the control diode is connected to a positive terminal of the voltage dividing capacitor; and a selective diode includes an anode And a cathode, and an anode thereof is connected to the series node between the control diode and the voltage dividing capacitor, a cathode is connected to the series node between the rectifying unit and the LED unit; and a switching diode system includes an anode and a cathode, and a cathode is connected to the negative end of the voltage dividing capacitor, and an anode is connected to the anode Ground terminal. The global linear LED driving circuit capable of de-flashing according to claim 7 or 8, wherein the constant current controller comprises: a voltage controlled transistor serially connected to the LED unit; and a current detecting unit And connecting the LED unit and the voltage-controlled transistor to detect a current flowing through the power circuit; and a current-stabilizing control unit electrically connected to the voltage-controlled transistor and the current detecting unit A low frequency filter reads the current signal detected by the current detecting unit; and controls the current flowing through the power circuit through the voltage control transistor according to the current signal, and maintains the current of the power circuit to be stable.