KR101371247B1 - Voltage Supporting type LED Lighting System - Google Patents

Abstract

LED lighting device of the voltage supplement method is published. LED lighting device of the present invention is driven to emit light by the rectified voltage LED emitting block; And a voltage supplement block driven to increase the rectified voltage in response to the rectified voltage becoming less than or equal to the reference voltage, wherein the reference voltage includes the voltage supplement block having a level corresponding to a threshold voltage. In the LED lighting apparatus of the present invention, the rectified voltage is supplemented and driven to increase in a section in which the voltage level is lowered. Accordingly, according to the LED lighting apparatus of the present invention, the rectified voltage is too low, and the light-out section is completely removed, thereby greatly improving the overall performance.

Description

LED lighting system of voltage supplement method {Voltage Supporting type LED Lighting System}

The present invention relates to a light emitting diode (LED) lighting apparatus, and more particularly, to an LED lighting apparatus that improves performance by preventing a completely off section.

BACKGROUND ART A light emitting diode (LED) element is a kind of compound semiconductor and is an element that emits light by a voltage to be applied. Such LED devices have the advantages of small size, long life, and high efficiency of converting electrical energy into light energy. Accordingly, an LED lighting device using an LED element is gradually being developed as an illumination device replacing an incandescent lamp and a fluorescent lamp.

In addition, in recent years, LED lighting apparatuses emit light in response to the size of an alternating voltage provided from the outside in order to easily improve and increase power efficiency and power factor without using complicated circuit structures and capacitors, inductors, and PFC ICs. A light emitting LED number control type LED lighting device in which the number of LED elements is controlled is being developed.

1 is a view for explaining a conventional LED lighting device, it shows a light emitting LED number controlled LED lighting device. In the existing LED lighting apparatus, the bridge diode MRC rectifies the supplied AC voltage VAC, as shown in FIG. 2, and generates the rectified voltage VREC. The LED elements of the LED light emitting block 10 classified into a plurality of LED modules MD1 to 4 emit light by the rectified voltage VREC.

At this time, the selection control signals VCON1 to 4 generated by the control block 40 are activated according to the magnitude of the rectified voltage VREC with respect to the ground voltage VSS, thereby turning on the switches SW1 to 4. The number of LED modules MD1 to 4 that emit light according to whether the switches SW1 to 4 formed between the taps TP1 to 4 and the ground voltage VSS between the LED modules MD1 to 4 are turned on. Controlled.

However, in the LED lighting apparatus of FIG. 1, a section in which the rectified voltage VREC is very low occurs. That is, in the section where the rectified voltage VREC is lower than the threshold voltage, the LEDs of the LED module 10 are completely turned off.

That is, in the LED lighting apparatus of FIG. 1, a problem of deterioration in performance occurs due to occurrence of a completely off section.

An object of the present invention is to solve the problems of the prior art, to provide an LED lighting device to improve the performance by removing the completely off section.

One aspect of the present invention for achieving the above object relates to an LED lighting device. LED lighting apparatus according to an aspect of the present invention is driven to emit light by the rectified voltage LED light emitting block; And a voltage supplement block driven to increase the rectified voltage in response to the rectified voltage becoming less than or equal to the reference voltage, wherein the reference voltage includes the voltage supplement block having a level corresponding to a threshold voltage.

Another aspect of the present invention for achieving the above object relates to an LED lighting apparatus. According to another aspect of the present invention, an LED lighting device includes: an LED light emitting block driven to emit light by a rectified voltage; And in response to the rectified voltage becoming less than or equal to a first reference voltage, driving the voltage to increase the rectified voltage primarily, and in response to the rectified voltage becoming less than or equal to a second reference voltage lower than the first reference voltage. And a voltage supplement block which is driven to raise the voltage secondarily.

In the LED lighting apparatus of the present invention, the rectified voltage is supplemented and driven to increase in a section in which the voltage level is lowered. Accordingly, according to the LED lighting apparatus of the present invention, the rectified voltage is too low, and the light-out section is completely removed, thereby greatly improving the overall performance.

A brief description of each drawing used in the present invention is provided.
1 is a view showing a conventional LED lighting device.
2 is a diagram for describing a rectified voltage generated by rectifying an AC voltage.
3 is a view showing an LED lighting apparatus according to an embodiment of the present invention.
4 is a view illustrating in detail the voltage sensing unit of FIG. 3.
5A is a diagram conceptually illustrating an example of the voltage supplement part of FIG. 3.
FIG. 5B is a diagram for describing an operation of main signals of FIG. 5A.
FIG. 5C is a diagram illustrating an example of actually implementing the voltage supplement of FIG. 5A.
6A is a diagram conceptually illustrating another example of the voltage supplement part of FIG. 3.
FIG. 6B is a diagram for describing an operation of main signals of FIG. 6A.
FIG. 6C is a diagram illustrating an example of actually implementing the voltage supplement of FIG. 6A.
7 is a view showing an LED lighting apparatus according to another embodiment of the present invention.
FIG. 8 is a detailed diagram illustrating the voltage sensing unit of FIG. 7.
9A and 9B are diagrams illustrating a first voltage supplement part and a second voltage supplement part of FIG. 7, respectively.
FIG. 9C is a diagram for describing an operation of main signals of FIGS. 9A and 9B.

For a better understanding of the present invention and its operational advantages, and the objects attained by the practice of the present invention, reference should be made to the accompanying drawings, which illustrate preferred embodiments of the invention, and the accompanying drawings. In understanding each of the figures, it should be noted that like parts are denoted by the same reference numerals whenever possible. Further, detailed descriptions of known functions and configurations that may be unnecessarily obscured by the gist of the present invention are omitted.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

3 is a view showing an LED lighting apparatus according to an embodiment of the present invention. Referring to FIG. 3, the LED lighting apparatus of this embodiment includes an LED light emitting block 100 and a voltage supplement block 200.

The LED light emitting block 100 is connected to a rectified voltage VREC generated from a rectifying generation block GPW. Preferably, the rectification generation block GPW comprises a rectifier MRC. The rectifier MRC rectifies the AC voltage VAC and provides the rectified voltage VREC to the rectifier stage NREC. Accordingly, the rectifier stage NREC has the rectified voltage. In this case, the rectified voltage VREC has a voltage in one direction with respect to the ground voltage VSS and changes with time.

Preferably, the rectifier MRC is a full-wave rectifier for rectifying the entire region of the AC voltage VAC with the voltage in the same direction to provide the rectified voltage VREC.

That is, by the rectifier MRC, a negative voltage at the AC voltage VAC is rectified to a positive voltage of the rectified voltage VREC.

More preferably, the rectifier MRC is a bridge diode.

3, the LED light emitting block 100 includes first to nth LED modules MD1 to 4 connected in series with each other. The first to nth LED modules MD1 to 4 are controlled to emit light by the rectified voltage VREC. In this case, each of the taps TP1 to 4 is formed between the LED modules MD1 to 4 and the cathode terminal of the last LED module MD4.

The switches SW1 to 4 of the switching block BKSW are connected to respective taps TP1 to 4 of the LED light emitting block 100, and the LED module MD1 to each tap TP1 to 4. Driven to form a closed circuit of ˜4).

Each of the switches SW1 to SW4 has a current of the taps TP1 to 4 and the ground voltage VSS of the corresponding LED modules MOD1 to MOD4 in response to respective selection control signals VCON1 to VCON4. By controlling the current flowing through the LED modules (MOD1 ~ MOD4).

In this case, the selection control signals VCON1 to VCON4 are provided from the control block BKCON. That is, the control block BKCON senses the rectified voltage VREC and generates the selection control signals VCON1 to VCON4 having the voltage level accordingly.

The number of LED modules emitted from the LED light emitting block 100 is determined depending on whether the switches SW1 to SW4 are turned on.

Meanwhile, in FIG. 3, the LED light emitting block 100 including four LED modules MOD1 to MOD4 is illustrated. However, it will be apparent to those skilled in the art that the number of LED modules included in the LED light emitting block 100 can be expanded or reduced.

3, the voltage supplement block 200 is driven to increase the rectified voltage VREC when the rectified voltage VREC becomes less than or equal to the reference voltage VRF. In the present embodiment, the reference voltage VRF is a virtual voltage having a level corresponding to a predetermined threshold voltage VTH.

The voltage supplement block 200 includes a voltage detector 210 and a voltage supplement 230.

The voltage detector 210 detects the rectified voltage VREC and generates a supplementary control signal XKPB. In this case, the supplementary control signal XKPB is activated when the rectified voltage VREC is less than or equal to the reference voltage VRF.

4 is a diagram illustrating the voltage detector 210 of FIG. 3 in detail. Referring to FIG. 4, the voltage sensing unit 210 includes a voltage level detecting unit 211 and a control signal generating unit 213.

The voltage level detecting unit 211 includes a first resistor R1 and a second resistor R2 connected in series with each other, and divides the rectified voltage VREC to generate a divided voltage VDIV. do. Here, when the rectified voltage VREC is the reference voltage VRF, the divided voltage VDIV is equal to the threshold voltage VTH, so that the first resistor R1 and the second resistor R2 are the same. The ratio of the resistance value is determined.

The control signal generating means 213 generates the supplementary control signal XKPB by comparing the divided voltage VDIV with the threshold voltage VTH. At this time, the supplementary control signal XKPB is activated to "L" when the divided voltage VDIV is lower than the threshold voltage VTH. That is, the supplementary control signal XKPB is activated to "L" when the rectified voltage VREC is lower than the reference voltage VRF.

Referring back to FIG. 3, when the rectified voltage VREC becomes less than or equal to the reference voltage VRF, the voltage replenishing unit 230 performs the rectified voltage VREC according to activation of the supplemental control signal XKPB. It is driven to raise.

5A is a diagram conceptually illustrating an example of the voltage supplement unit 230 of FIG. 3, and illustrates a voltage supplement unit of an upper switch type. 5B is a view for explaining the operation of the main signal of FIG. 5A. Referring to FIG. 5A, the voltage supplement 230 according to an example includes an upper switch 231, an upper diode 233, and an upper capacitor 235.

The upper switch 231 is turned on in response to activation of the supplemental control signal XKPB to " L ". In this case, a current path is formed between the upper coupling node NUCP and the rectifying stage NREC.

The upper diode 233 has an anode terminal connected to the rectifying terminal NREC, and a cathode terminal connected to the upper coupling node NUCP. Accordingly, the upper diode 233 generates a forward current from the rectifying stage NREC to the upper coupling node NUCP.

One end of the upper capacitor 235 is coupled to the upper coupling node NUCP, and the other end is coupled to the ground voltage VSS.

According to the voltage replenishing unit 230 having the configuration as shown in FIG. 5A, in the charging section P-CHA (FIG. 5B) in which the rectified voltage VREC is higher than the reference voltage VRF, the supplementary control signal (XKPB) is deactivated to "H". Accordingly, in the charging section P-CHA, the charge of the rectifying stage NREC is charged and maintained in the upper capacitor 233 through the upper diode 233. As a result, the voltage of the upper coupling node NUCP remains high.

In the discharge section P-DIS in which the rectified voltage VREC is equal to or less than the reference voltage VRF, the supplementary control signal XKPB is activated as “H”, and the upper portion of the voltage supplement unit 230 is configured to be the upper portion. The switch 231 is turned on. Accordingly, charges charged in the upper capacitor 235 are discharged to the rectifying stage NREC. As a result, the rectified voltage VREC rises to the voltage of the upper coupling node NUCP (see t11 in FIG. 5B).

Accordingly, excessive drop of the rectified voltage VREC is prevented, and complete extinction of the LED modules MD1 to 4 of the LED light emitting block 100 is also prevented.

FIG. 5C is a diagram illustrating an example of actually implementing the voltage supplement part 230 of FIG. 5A. Referring to FIG. 5C, the voltage supplement unit 230 may include an upper PMOS transistor 231_1, an upper control transistor 231_3, and an upper capacitor 235.

The upper PMOS transistor 231_1 includes one junction coupled to the rectifying stage NREC, and the other junction and bulk coupled to the upper coupling node NUCP. At this time, a diode 233 ′ corresponding to the upper diode 233 of FIG. 5A is unintentionally formed between the one junction and the bulk of the PMOS transistor 231_1.

The upper control transistor 231_3 is implemented as an NMOS transistor having one junction connected to the gate terminal of the PMOS transistor 231_1 and another junction connected to the ground voltage VSS. Accordingly, the upper control transistor 231_3 switches the gate terminal of the PMOS transistor 231_1 to the ground voltage VSS in response to activation of the supplemental control signal XKPB, which is inverted by the inverter 231_7, to " L ". ). As a result, the PMOS transistor 231_1 is turned on in response to the activation of the supplemental control signal XKPB to " L ".

In FIG. 5C, a resistor 231_5 is formed between the other terminal of the PMOS transistor 231_1 and the gate terminal. Accordingly, floating of the gate terminal of the PMOS transistor 231_1 is prevented.

Meanwhile, in the actual implementation of FIG. 5C, the block 231 ′ including the PMOS transistor 231_1, the control transistor 231_3, the resistor 231_5, and the inverter 231_7 is the upper switch 231 of FIG. 5A. Corresponds to.

In addition, in FIG. 5C, the upper capacitor 235 is implemented to include one terminal coupled to the upper coupling node NUCP and another terminal coupled to the ground voltage VSS.

On the other hand, the voltage supplement 230 as described above may be implemented in various forms.

6A is a diagram conceptually illustrating another example of the voltage supplement unit 230 of FIG. 3, and illustrates a voltage supplement unit of a lower switch type. 6B is a diagram for describing the operation of the main signal of FIG. 6A. Referring to FIG. 6A, the voltage supplement unit 230 according to another embodiment includes a lower capacitor 236, a lower switch 238, and a lower diode 239.

One end of the lower capacitor 236 is coupled to the rectified voltage NREC, and the other end is coupled to the lower coupling node NDCP.

The lower switch 238 is connected between the lower coupling node NDCP and the first power source (in this embodiment, the ground voltage VSS) in response to activation of the supplemental control signal XKPB to " L ". Form a current path.

The anode terminal of the lower diode 239 is connected to the lower coupling node NDCP, and the cathode terminal is connected to the ground voltage VSS. Accordingly, the lower diode 239 generates a forward current from the lower coupling node NDCP to the ground voltage VSS.

According to the voltage replenishing unit 230 having the configuration as shown in FIG. 6A, in the period P-PRE (FIG. 6B) in which the rectified voltage VREC is higher than the reference voltage VRF, the supplementary control signal XKPB is used. Is deactivated with "H". At this time, in the rising timing P-PRE1 at which the rectified voltage VREC in the period P-PRE increases, the lower coupling node NDCP is maintained at the ground voltage VSS. Subsequently, at the falling timing P-PRE2 at which the rectified voltage VREC in the period P-CHA falls, the lower coupling node NDCP drops to a negative voltage.

In the coupling period P-CUP where the rectified voltage VREC is less than or equal to the reference voltage VRF, the supplemental control signal XKPB is activated as “H”. The lower switch 238 is turned on. Accordingly, the lower coupling node NDCP rises to the ground voltage VSS (see t21 in FIG. 6B).

Accordingly, the rectified voltage VREC coupled to the lower coupling node NDCP also rises (see t22 in FIG. 6B).

As a result, excessive falling of the rectified voltage VREC is prevented, and complete extinction of the LED modules MD1 to 4 of the LED light emitting block 100 is also prevented.

FIG. 6C is a diagram illustrating an actual implementation of the voltage supplement 230 of FIG. 6A. Referring to FIG. 6C, the voltage supplement unit 230 may include a lower capacitor 236 ′ and a lower PMOS transistor 238 ′.

In FIG. 6C, one end of the lower capacitor 236 is coupled to the rectified voltage VREC and the other end is coupled to the lower coupling node NDCP.

The lower PMOS transistor 238 ′ includes one junction coupled to the ground voltage VSS, and another junction and bulk coupled to the lower coupling node NDCP. At this time, between the bulk and the one junction of the lower PMOS transistor 238 ', a diode 239' corresponding to the lower diode 239 of FIG. 6A is formed unintentionally.

6C, the lower PMOS transistor 238 ′ corresponds to the lower switch 238 of FIG. 6A.

In the LED lighting apparatus of the present embodiment as described above, the rectified voltage is driven to be supplemented and raised in a section in which the voltage level is lowered. Accordingly, by the LED lighting apparatus of the present embodiment, the rectified voltage is too low to completely eliminate the unlit section, thereby greatly improving the overall performance.

On the other hand, the LED lighting device of the present invention can be modified in various ways.

7 is a view showing an LED lighting apparatus according to another embodiment of the present invention, in which a plurality of voltage supplements are implemented in the voltage supplement block 1200. Referring to FIG. 7, the LED lighting apparatus of this embodiment includes an LED light emitting block 1100 and a voltage supplement block 1200.

LED light emitting block 1100, rectification generation block (GPW), switching block (BKSW) and control block (BKCON) of Figure 7 LED light emitting block 100, rectification generation block (GPW), switching block (BKSW) of FIG. ) And control block (BKCON) can have the same configuration and effect, and for the sake of simplicity, detailed description thereof is omitted.

7, when the rectified voltage VREC becomes less than or equal to the first reference voltage VRF1, the voltage supplement block 1200 is driven to raise the rectified voltage VREC to a primary level. When the VREC is lower than or equal to the first reference voltage VRF1, the rectified voltage VREC is driven to increase first. In the present embodiment, the first reference voltage VRF1 and the second reference voltage VRF2 are virtual voltages having a level corresponding to a predetermined threshold voltage VTH.

In detail, the voltage supplement block 1200 includes a voltage detector 1210, a first voltage supplement 1230, and a second voltage supplement 1250.

The voltage detector 1210 detects the rectified voltage VREC and generates a first supplementary control signal XKPB1 and a second supplementary control signal XKPB2. In this case, the first supplementary control signal XKPB1 is activated when the rectified voltage VREC is less than or equal to the first reference voltage VRF1. The second supplementary control signal XKPB2 is activated when the rectified voltage VREC is less than or equal to the second reference voltage VRF2.

FIG. 8 is a detailed diagram of the voltage detector 1210 of FIG. 7. Referring to FIG. 8, the voltage detecting unit 2110 includes a voltage level detecting unit 1211, a first control signal generating unit 1213, and a second control signal generating unit 1215.

The voltage level detecting unit 1211 includes first to third resistors R1 to R3 connected in series to each other, and divides the rectified voltage VREC to divide the first divided voltage VDIV1 and the first divided voltage. Generates a divided voltage VDIV2. Here, when the rectified voltage VREC is the first reference voltage VRF1, the first divided voltage VDIV becomes equal to the threshold voltage VTH, and the rectified voltage VREC is equal to the second voltage. When the reference voltage VRF2 is set, the ratio of the resistance values of the first to third resistors R1 to R3 is determined such that the second divided voltage VDIV2 is equal to the threshold voltage VTH.

The first control signal generating unit 1213 generates the first supplementary control signal XKPB1 by comparing the first divided voltage VDIV1 with the threshold voltage VTH. In this case, the first supplementary control signal XKPB1 is activated as "L" when the first divided voltage VDIV1 is lower than the threshold voltage VTH. That is, the first supplementary control signal XKPB1 is activated to "L" when the rectified voltage VREC is lower than the first reference voltage VRF1.

The second control signal generating unit 1215 generates the second supplementary control signal XKPB2 by comparing the second divided voltage VDIV2 with the threshold voltage VTH. In this case, the second supplementary control signal XKPB2 is activated as “L” when the second divided voltage VDIV2 is lower than the threshold voltage VTH. That is, the second supplementary control signal XKPB2 is activated to "L" when the rectified voltage VREC is lower than the second reference voltage VRF2.

Referring to FIG. 7 again, when the rectified voltage VREC becomes less than or equal to the first reference voltage VRF1, the first voltage supplemental unit 1230 may activate the first supplementary control signal XKPB1. The rectified voltage VREC is driven to raise the primary.

When the rectified voltage VREC becomes less than or equal to the second reference voltage VRF2, the second voltage supplemental unit 1250 may adjust the rectified voltage VREC according to activation of the second supplementary control signal XKPB2. Is driven to raise secondary.

9A and 9B are diagrams illustrating the first voltage supplement part 1230 and the second voltage supplement part 1250 of FIG. 7, respectively. 9C is a diagram for explaining the operation of the main signals of FIGS. 9A and 9B.

Referring to FIG. 9A, the first voltage supplement part 1230 includes an upper switch 1231, an upper diode 1233, and an upper capacitor 1235.

The upper switch 1231 is turned on in response to activation of the first supplementary control signal XKPB1 to "L". At this time, a current path is formed between the upper coupling node NUCP1 and the rectifying stage NREC.

The upper diode 1233 has an anode terminal connected to the rectifying terminal NREC, and a cathode terminal connected to the upper coupling node NUCP1. Accordingly, the upper diode 1233 generates a forward current from the rectifying stage NREC to the upper coupling node NUCP1.

One end of the upper capacitor 1235 is coupled to the upper coupling node NUCP1, and the other end is coupled to the ground voltage VSS.

9B, the second voltage supplement 1250 includes an upper switch 1251, an upper diode 1253, and an upper capacitor 1255.

The upper switch 1251 is turned on in response to activation of the second supplemental control signal XKPB2 to "L". At this time, a current path is formed between the upper coupling node NUCP2 and the rectifying stage NREC.

The upper diode 1253 has an anode terminal connected to the rectifying terminal NREC, and a cathode terminal connected to the upper coupling node NUCP2. Accordingly, the upper diode 1253 generates a forward current from the rectifying stage NREC to the upper coupling node NUCP2.

One end of the upper capacitor 1255 is coupled to the upper coupling node NUCP2, and the other end is coupled to the ground voltage VSS.

9A and 9B, the rectified voltage VREC is higher than the first reference voltage VRF1 according to the first voltage supplement part 1230 and the second voltage supplement part 1250. In the in charge section P-CHA (FIG. 9C), the first supplementary control signal XKPB1 and the second supplementary control signal XKPB2 are deactivated to " H ". Accordingly, in the charging section P-CHA, the charge of the rectifying stage NREC is transferred to the upper capacitor 1233 and the upper capacitor 1253 through the upper diode 1233 and the upper diode 1253. It remains charged. As a result, the voltages of the upper coupling node NUCP1 and the upper coupling node NUCP2 are kept rising.

In the discharge period P-DIS, when the rectified voltage VREC is less than or equal to the first reference voltage VRF, the first supplemental control signal XKPB1 is applied. Activated as "H", the upper switch 1231 is turned on. Accordingly, the charges charged in the upper capacitor 1235 are discharged to the rectifying stage NREC. As a result, the rectified voltage VREC is first raised to the voltage of the upper coupling node NUCP1 (see t31 in FIG. 9C).

Thereafter, when the rectified voltage VREC falls again and falls below the second reference voltage VRF, the second supplementary control signal XKPB2 of the second voltage supplemental unit 1250 is also activated as “H”. The upper switch 1251 is turned on. Accordingly, the charges charged in the upper capacitor 1255 are discharged to the rectifying stage NREC. As a result, the rectified voltage VREC is secondly increased to the voltage of the upper coupling node NUCP2 (see t33 in FIG. 9C).

In the LED lighting apparatus of the present embodiment as described above, the rectified voltage is driven to be supplemented and raised in a section where the voltage level is lowered. Accordingly, by the LED lighting apparatus of the present invention, the rectified voltage is too low to completely eliminate the unlit section, thereby greatly improving the overall performance.

In particular, in another embodiment of FIG. 7, the plurality of voltage supplements 1230 and 1250 are provided in the voltage supplement block 1200, so that the upper capacitors 1235 and 1255 are provided in the upper capacitors 1235 and 1255 as compared with the case where one voltage supplement is provided. The average value of the stored voltage can be lowered. In this case, the reliability of the capacitors 1235 and 1255 is improved.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.

For example, in this specification, an embodiment in which an upper switch type voltage supplement is extended to two or more is shown and described. However, it is obvious to those skilled in the art that the technical idea of the present invention can be implemented even when the voltage switch of the lower switch type is extended to two or more.

Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims.

Claims (10)

In an LED lighting device,
An LED light emitting block driven to emit light by the rectified voltage; And
A voltage supplement block driven to raise the rectified voltage in response to the rectified voltage becoming below a reference voltage,
The voltage supplement block
A voltage sensing unit generating a supplementary control signal, wherein the supplementary control signal is activated by the rectified voltage below the reference voltage; And
A voltage replenishment unit which is driven to increase the rectified voltage according to activation of the replenishment control signal,
The voltage supplement
An upper switch, in response to the supplemental control signal, forming an electrical current path between the upper coupling node and the rectifying stage;
An upper diode generating a forward current from the rectifying stage generating the rectified voltage to the upper coupling node; And
And an upper capacitor for charging the charge of the upper coupling node.
delete The method of claim 1, wherein the voltage sensing unit
Voltage level sensing means for dividing the rectified voltage to generate a divided voltage; And
Control signal generating means for generating the supplementary control signal by comparing the divided voltage with a threshold voltage, wherein the supplementary control signal includes the control signal generating means activated according to the divided voltage lower than the threshold voltage; LED lighting device.
delete In an LED lighting device,
An LED light emitting block driven to emit light by the rectified voltage; And
A voltage supplement block driven to raise the rectified voltage in response to the rectified voltage becoming below a reference voltage,
The voltage supplement block
A voltage sensing unit generating a supplementary control signal, wherein the supplementary control signal is activated by the rectified voltage below the reference voltage; And
A voltage replenishment unit which is driven to increase the rectified voltage according to activation of the replenishment control signal,
The voltage supplement
An upper PMOS transistor having one junction coupled to the rectified voltage and the other junction and bulk coupled to an upper coupling node;
An upper control transistor configured to control a gate terminal of the PMOS transistor in response to the supplementary control signal to turn on the PMOS transistor;
And an upper capacitor having one end coupled to the upper coupling node.
In an LED lighting device,
An LED light emitting block driven to emit light by the rectified voltage; And
A voltage supplement block driven to raise the rectified voltage in response to the rectified voltage becoming below a reference voltage,
The voltage supplement block
A voltage sensing unit generating a supplementary control signal, wherein the supplementary control signal is activated by the rectified voltage below the reference voltage; And
A voltage replenishment unit which is driven to increase the rectified voltage according to activation of the replenishment control signal,
The voltage supplement
A lower capacitor having one end coupled to the rectified voltage and the other end coupled to the lower coupling node;
A lower switch, in response to the supplemental control signal, forming a current path between the lower coupling node and a first power source; And
And a lower diode configured to generate a forward current to the first power supply at the lower coupling node.
In an LED lighting device,
An LED light emitting block driven to emit light by the rectified voltage; And
A voltage supplement block driven to raise the rectified voltage in response to the rectified voltage becoming below a reference voltage,
The voltage supplement block
A voltage sensing unit generating a supplementary control signal, wherein the supplementary control signal is activated by the rectified voltage below the reference voltage; And
A voltage replenishment unit which is driven to increase the rectified voltage according to activation of the replenishment control signal,
The voltage supplement
A lower capacitor having one end coupled to the rectified voltage and the other end coupled to the lower coupling node; And
And a lower PMOS transistor, wherein one junction is coupled to the first power source and the other junction and bulk are coupled to the lower coupling node.
The method of claim 7, wherein the LED light emitting block
A plurality of LED elements, LED lighting apparatus comprising the plurality of LED elements of which the number of light emitted according to the rectified voltage is adjusted.
delete delete

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