WO2014092499A1

WO2014092499A1 - Light-emitting diode lamp and light-emitting diode lighting device

Info

Publication number: WO2014092499A1
Application number: PCT/KR2013/011580
Authority: WO
Inventors: 김용근; 이상영; 안기철; 문경식
Original assignee: 주식회사 실리콘웍스
Priority date: 2012-12-14
Filing date: 2013-12-13
Publication date: 2014-06-19
Also published as: KR101431614B1; KR20140077574A

Abstract

Disclosed are a light-emitting diode lamp and a light-emitting diode lighting device which have been improved so as to have flexibility with respect to a service environment. The light-emitting diode lamp comprises: a serial unit including first light-emitting diodes which are arranged in the center of a light-emitting area in a line and are connected in series; and a parallel unit including second light-emitting diodes which are respectively arranged in both-end areas in a lengthwise direction of the light-emitting area in a line and are connected in parallel.

Description

LED lighting and LED lighting device

The present invention relates to a light emitting diode lighting, and more particularly, to a light emitting diode lamp and a light emitting diode lighting device improved to have flexibility for the use environment.

Lighting technology is being developed in the trend of adopting a light emitting diode (LED) as a light source for energy saving.

High brightness light emitting diodes have the advantage of being differentiated from other light sources in various factors such as energy consumption, lifetime and light quality.

However, a lighting device using a light emitting diode as a light source has a problem in that a lot of additional circuits are required due to the characteristic that the light emitting diode is driven by a constant current.

One example developed to solve the above problems is an AC direct type lighting device.

An AC direct type LED lighting apparatus generates a rectified voltage from a commercial AC power supply to drive a light emitting diode. The AC direct type LED lighting device has a good power factor because the rectifier voltage is directly used as an input voltage without using an inductor and a capacitor.

The general light emitting diode lighting device is designed to be driven by the rectified voltage rectified commercial power.

The LED lighting lamp of the LED lighting apparatus generally has a configuration in which a large number of LEDs are connected and driven in series.

Therefore, the LED lighting device is configured to provide a rectified voltage capable of turning on a large number of LEDs connected in series.

However, the LED lighting device can be driven in various usage environments.

The LED lighting apparatus has a problem in that it operates abnormally when the design specification and the use environment do not match.

For example, the LED lamp of the LED lighting device may be designed to be turned on at 12V. However, when the commercial AC power is unstable or when the commercial AC power is supplied at an insufficient level, the LED lighting apparatus can provide a voltage of 12 V or less to the LED lighting.

As such, when the design specification and the use environment do not match, the LED lighting apparatus may not emit light or emit light with abnormal brightness.

Therefore, it is desired to develop a light emitting diode lighting device capable of normal lighting even at a low voltage.

An object of the present invention is to provide a light emitting diode lighting device with flexibility to the environment of use.

Another object of the present invention is to change the design environment of a light emitting diode lighting device to be able to operate at a low operating voltage while maintaining a constant quantity of light emitting diodes.

A light emitting diode lamp according to the present invention includes: a serial unit including first light emitting diodes connected in series while being arranged in a line in a light emitting area; And a parallel part including second light emitting diodes arranged in a row in the light emitting area and connected in parallel, wherein the first light emitting diodes and the second light emitting diodes are arranged in line and electrically connected to each other. It is characterized by.

In addition, the LED lighting apparatus according to the present invention includes a series portion including first light emitting diodes connected in series and arranged in series in the light emitting area, and second light emitting diodes arranged in parallel and arranged in line in the light emitting area. The first light emitting diodes and the second light emitting diodes are arranged in a row and electrically connected to each other to form a light source, and the light source is divided into a plurality of channels of turn-on and turn-off sequentially. ; A power supply unit providing a rectified voltage converted from commercial power to the light emitting diode lamp; And a current control circuit for providing a current path for turning on for each channel of the LED lamp.

Therefore, the LED lighting device and the LED lighting device according to the present invention have the effect of having flexibility for the use environment by the changed design environment to be operable at a low operating voltage while maintaining a constant number of light emitting diodes.

In addition, the LED lamp and the LED lighting device according to the present invention has the effect of having flexibility in response to changes in the use environment by forming a parallel portion to have a driving capability corresponding to a low voltage in the light emitting region.

1 is a layout view of light emitting diodes showing a preferred embodiment of a light emitting diode lamp according to the present invention;

2 is a layout view showing a modified embodiment of FIG.

3 is a layout view illustrating another embodiment of the parallel part of FIG. 1.

4 is a layout view of light emitting diodes showing another embodiment of a light emitting diode lamp according to the present invention;

5 is a block diagram showing an embodiment of a LED lighting apparatus according to the present invention.

FIG. 6 is a circuit diagram illustrating the current control circuit of FIG. 5.

FIG. 7 is a waveform diagram illustrating an operation of the embodiment of FIG. 5. FIG.

8 is a layout view of light emitting diodes showing another embodiment of a light emitting diode lamp according to the present invention;

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the present invention. The terms used in the present specification and claims are not to be construed as being limited to ordinary or dictionary meanings, but should be interpreted as meanings and concepts corresponding to the technical matters of the present invention.

The embodiments described in the specification and the configuration shown in the drawings are preferred embodiments of the present invention, and do not represent all of the technical idea of the present invention, various equivalents and modifications that can replace them at the time of the present application are There may be.

The LED lamp 10 according to the present invention includes a light source in which a plurality of

light emitting diodes

16 and 18 are configured in one row as shown in FIGS. 1 and 2. The LED lamp 10 includes

light emitting diodes

16 and 18 divided into a plurality of channels CH1, CH2, CH3, and CH4, and the plurality of channels CH1, CH2, CH3, and CH4 will be described later. The light is sequentially emitted and quenched as described.

1 and 2 have a light emitting area in which a plurality of

light emitting diodes

16, 18 are arranged in a line.

The light emitting area of the LED lamp 10 may be divided into a series S and a parallel P. The series portion S is formed in the center of the light emitting region, and the parallel portion P is formed in both end regions of the series portion S. As shown in FIG.

The serial portion S has a configuration in which the light emitting diodes 16 arranged in a line are electrically connected in series, and the parallel portion P has a configuration in which the light emitting diodes 18 arranged in a line are electrically connected in parallel. Have

Hereinafter, the light emitting diodes 16 arranged in the series S are defined as first light emitting diodes, and the light emitting diodes 18 arranged in the parallel P are defined as second light emitting diodes.

The first light emitting diodes 16 of the series S have a configuration forming an array in the forward direction and are spaced apart from each other. The first light emitting diodes 16 adjacent to the series S in the forward direction are connected to each other by an output terminal and an input terminal facing each other.

The first light emitting diodes 16 included in the series S may be recognized as point light sources when the separation interval is large. Therefore, the first light emitting diodes 16 included in the series S may be spaced apart at regular intervals of 10 mm or less so that they can be recognized as line light sources.

The second light emitting diodes 18 of the parallel portion P are also arranged in a line in the forward direction like the series portion S. FIG.

The parallel part P may be wired to include a structure in which two or more second light emitting diodes 18 are electrically connected in parallel.

1 and 2 illustrate a parallel structure in which the second light emitting diodes 18 arranged in a row are divided into two groups, and the branched structure of the parallel part P is intended by the manufacturer. And may be implemented in various ways other than as illustrated in FIGS. 1 and 2.

In the parallel part P of FIG. 1, wirings are formed such that odd-numbered and even-numbered second light emitting diodes 18 are connected in series in different paths. That is, the wiring of the parallel part P of FIG. 1 is laid out so that odd-numbered or even-numbered light emitting diodes 18 may be connected in series in an interlace manner.

Further, even-numbered and odd-numbered second light emitting diodes 18 are coupled in parallel with the series S. That is, the odd-numbered and even-numbered second light emitting diodes 18 of the parallel portion P with respect to the series portion S are commonly connected in a structure divided into two groups.

Meanwhile, the parallel part P of FIG. 2 divides the second light emitting diodes 18 into two groups with the same number in the order in which the second light emitting diodes 18 are arranged, and the second light emitting diodes 18 of each group are connected in series. Is formed. In addition, wiring is formed such that the two groups of second light emitting diodes 18 connected in series are parallel to the series S. FIG.

In addition, the parallel portion (P) may be configured in a multi-stage parallel structure as shown in FIG. The multi-stage parallel structure means that two or more parallel structures are connected in series, and the groups of the light emitting diodes 18 may be divided such that each parallel structure has a different number of branching structures.

The parallel part P of FIG. 3 illustrates a multi-stage parallel structure in which a first parallel part P4 divided into four groups and a second parallel part P2 divided into two groups are connected in series. .

1 to 3, the second light emitting diodes 18 of the parallel part P may be uniformly spaced at the same interval as the first light emitting diodes 16 of the series part S to be a line light source. It may be configured to be recognized.

A voltage lower than the voltage applied to the first light emitting diodes 16 of the series S is applied to the second light emitting diodes 18 of the parallel portion P of FIGS. 1 and 2. That is, the light emitting diodes 18 of the parallel portion P are applied with a low voltage divided by parallel connection.

Due to the voltage application environment as described above, the illuminance of the second light emitting diodes 18 of FIGS. 1 and 2 is lower than that of the first light emitting diodes 16.

Therefore, the light emitting area of the LED lamp 10 may maintain the high illuminance at the center where the series part S is configured, and maintain the relatively low illuminance at the both ends of the longitudinal direction where the parallel part P is configured. .

On the contrary, according to the intention of the manufacturer, the embodiment according to the present invention may be modified such that the parallel portion P and the series portion S have uniform illuminance.

In order for the parallel portion P and the series portion S to have uniform illuminance, the second light emitting diodes 18 of the parallel portion P may be disposed such that the separation interval is narrower than that of the series portion S. FIG.

As described above, by increasing the placement density of the second light emitting diodes 18 of the parallel part P, the illuminance of the parallel part P may be the same as the series part S. FIG.

At this time, the placement density of the second light emitting diodes 18 of the parallel part P, that is, the spacing interval, may be equal to the first light emitting diodes 16 of the series part S and the second light emitting diodes of the parallel part P ( It may be set to be proportional to the relationship of the voltages applied to the 18).

More specifically, the first state in which a voltage of 1V is applied to the first light emitting diodes 16 and a voltage of 0.5V is applied to the second light emitting diodes 18 and a separation interval between the first light emitting diodes 16 and the first state Assuming a second state set to 10 mm, the spacing between the second light emitting diodes 18 may be set to 5 mm.

The adjustment of the placement density of the second light emitting diodes 18, that is, the spacing interval, is for improving the illuminance of the parallel portion P to the same level as the series portion S. That is, a difference occurs in the voltages applied to the first light emitting diodes 16 and the second light emitting diodes 18, and the illuminance of the second light emitting diodes 18 is the first light emitting diode due to the voltage difference. The phenomenon of falling to 1/2 than the field 16 occurs. The above phenomenon can be compensated for by doubling the placement density of the second light emitting diodes 18.

Meanwhile, even when the parallel part P has a multi-stage parallel structure as shown in FIG. 3, the arrangement density of the second light emitting diodes 18, that is, the spacing interval, may be adjusted so that the LED lamp 10 may have uniform illuminance. .

As described above, the

light emitting diodes

16 and 18 disposed as the serial unit S and the parallel unit P to form a light source may be divided into a plurality of channels in which turn-on is sequentially performed.

The embodiment according to the present invention illustrates that the light emitting diodes are divided into four channels CH1 to CH4 as shown in FIGS. 1 and 2.

The number of light emitting diodes may be the same or different for each channel. As an example, the LED lamp 10 of FIG. 1 and FIG. 2 and FIG. 4 to be described later has a larger number of channels CH1 than the other channels CH2, CH3 and CH4 at which the rectified voltage is applied. In addition, other channels CH2, CH3, and CH4 subsequent to the channel CH1 are illustrated as being configured in the same number. The number of light emitting diodes for each channel may be variously performed according to the manufacturer's intention.

In addition, the LED lamp 10 according to the present invention may include a plurality of columns as shown in FIG. In FIG. 4, the LED lamp 10 is illustrated to include three rows in which the

LEDs

16 and 18 are uniformly arranged.

Each column of the LED lamp 10 of FIG. 4 is electrically connected to both end regions of the first LEDs 16 and the first LEDs 16 forming the series S, and thus the parallel parts P It includes a second light emitting diode to form a. In addition, the plurality of columns may be configured to be electrically connected in series by being connected in a meander shape.

The LED lamp 10 of the embodiment of FIG. 4 is also divided into four channels CH1, CH2, CH3, CH4.

The channel CH1 exemplifies that the channel CH1 is formed through the plurality of parallel parts P by including a part of the first row, the second row, and the third row. That is, in one embodiment of the present invention, one or more channels may be formed to pass through two or more parallel parts (P).

The configuration of the serial portion S and the parallel portion P of the embodiment of FIG. 4 illustrates the same configuration as that of FIGS. 1 and 2, and a redundant description thereof will be omitted. In addition, some or all of the parallel part P of the embodiment of FIG. 4 may be implemented to have a multi-stage parallel structure as shown in FIG. 3.

Since the second light emitting diodes 18 of the parallel portion P of FIG. 4 are also applied with a lower voltage than the first light emitting diodes 16 of the series portion S, the illuminance of the second light emitting diodes 18 is lower than that of the first light emitting diodes 16. Have

Therefore, the LED lamp 10 of FIG. 4 also maintains high illuminance at the center where the series S is formed, as shown in FIGS. 1 and 2, and relatively low illuminance at both ends of the longitudinal direction where the parallel P is formed. The effect can be obtained.

In addition, in the embodiment of FIG. 4, according to the intention of the manufacturer, the arrangement density of the second light emitting diodes 18 of the parallel part P, that is, the spacing interval, may be adjusted so that the parallel part P and the series part S have uniform illuminance. Can be adjusted.

1 to 4 according to the present invention may require a lower turn-on voltage than the structure in which all the light emitting diodes are connected in series.

It will be described in more detail with reference to FIG.

If it is assumed that a voltage of 2V is required to turn on each of the light emitting diodes 16 configured in the series S, a voltage of 8V is required to turn on four series-connected light emitting diodes.

However, the parallel part P having a structure divided into two pairs by one pair requires a voltage of 8 V for turning on the four light emitting diodes 18.

Therefore, the voltage required for turning on the same four light emitting diodes has the effect that the parallel portion P drops by 4V rather than the series portion S. FIG.

As a result, in the embodiment configured as shown in FIG. 1, the voltage required for turn-on may be reduced by 8V by the parallel portions P of both end regions.

Therefore, when the LED lamp 10 is designed based on the voltage required for the turn-on of all the light emitting diodes based on 100V, even if the commercial AC voltage is lowered to 96V due to an abnormal or unstable use environment, the embodiment according to the present invention is parallel. It can operate normally by the drive ability corresponding to the low voltage of (P).

That is, since the LED lamp 10 according to the present invention can operate in a low voltage environment with respect to the same number of light emitting diodes, there is an advantage in that flexibility in use environment.

The light emitting diode lamp 10 of FIGS. 1 to 4 is driven by an AC direct method, and FIGS. 5 to 7 illustrate a light emitting diode driving the light emitting diode lamp 10 that is powered by an AC direct method using current regulation. An example of a lighting device is shown.

FIG. 5 is a block diagram of the LED lighting apparatus, FIG. 6 is a detailed circuit diagram of the current control circuit, and FIG. 7 is a waveform diagram for explaining an operation according to the embodiment of FIG. 5.

Referring to FIG. 5, an embodiment according to the present invention is turned on for each channel of the LED lamp 10, a power supply unit for providing a rectified voltage converted from a commercial power source to the LED lamp 10, and the LED lamp 10. It can be configured to include a current control circuit 14 for providing a current path for.

The LED lamp 10 may be configured as any one of FIGS. 1 to 4, and a detailed description thereof will be omitted since it overlaps with the description of FIGS. 1 to 4.

In FIG. 5, the LED lamp 10 includes four LED channels CH1, CH2, CH3, and CH4. Each channel CH1, CH2, CH3, and CH4 may include a plurality of light emitting diodes as shown in FIGS. 1 to 4, and are represented in the drawings by one diode code for convenience of description.

The power supply unit is configured to rectify an AC voltage flowing from the outside and output the rectified voltage.

As shown in FIG. 5, the power supply unit rectifies the _AC power supply V _AC having the AC voltage and the AC power supply V _AC to smooth the rectified voltage output from the rectifier circuit 12 and the rectifier circuit 12. Capacitor C may be included.

Here, the AC power source (V _AC ) may be a commercial power source.

The rectifier circuit 12 carries out full-wave rectification of an AC voltage having a sinusoidal waveform of the _AC power supply V _AC and outputs a rectified voltage as shown in FIG. 7. Therefore, the rectified voltage has a characteristic of having a ripple component in which the voltage level rises and falls in half cycle units of the commercial AC voltage.

The current control circuit 14 includes four channel terminals P1, P2, P3, and P4, and the output terminal of each channel CH1, CH2, CH3, CH4 of the LED lamp 10 is a current control circuit 14. Is connected to the channel terminals P1, P2, P3, and P4.

The current control circuit 14 may be implemented as a circuit in which individual elements are assembled or in a one-chip. Each channel terminal P1, P2, P3, and P4 may be a circuit in which individual elements are assembled. If implemented, it means a node connected to the output side of each channel (CH1, CH2, CH3, CH4), and if implemented in one chip, it means a port connected to the output side of each channel (CH1, CH2, CH3, CH4). .

The current control circuit 14 may include a current detection resistor Rg having one end grounded.

According to the configuration of FIG. 5 described above, according to the embodiment of the present invention, each channel CH1, CH2, CH3, CH4 of the LED lamp 10 sequentially emits or extinguishes in response to the rise or fall of the rectified voltage. . As the rectified voltage rises, the current control circuit 14 sequentially turns on and off the light of each channel CH1, CH2, CH3, and CH4 when the turn-on voltage of each of the channels CH1, CH2, CH3, and CH4 is reached. Provide a plurality of optional current paths that are turned off or on.

Here, the turn-on voltage for turning on the channel CH4 is defined as a voltage for turning on all the channels CH1, CH2, CH3, and CH4, and the turn-on voltage for turning on the channel CH3 is defined as the channels CH1, CH2, The turn-on voltage for turning on all of the channels CH3 is defined as the voltage for turning on the channels CH1 and CH2, and the turn-on voltage for turning on the channel CH1 is for the channel CH1. ) Is defined as the voltage that turns on.

The current control circuit 14 detects the current detection voltage by the current detection resistor Rg, and the current detection voltage may be changed by a current which varies according to the turn-on state for each channel of the LED lamp 10. In this case, the current flowing through the current detection resistor Rg may be a constant current.

The current control circuit 14 may be implemented in various ways according to the manufacturer's intention, and may be configured as shown in FIG. 6 as an example.

Referring to FIG. 6, the current control circuit 14 includes a plurality of switching circuits 30_1, 30_2, 30_3, and 30_4 that provide current paths for the channels CH1, CH2, CH3, and CH4.

The current control circuit 14 also includes a reference voltage generation circuit 20 for providing the reference voltages VREF1, VREF2, VREF3, and VREF4.

The reference voltage generation circuit 20 includes a plurality of series connected resistors R1, R2, R3, R4, and R5 to which a constant voltage VREF is applied.

Resistor R1 is connected to ground, and constant voltage VREF is applied to resistor R5. Resistor R5 acts as a load resistor to regulate the output. The resistors R1, R2, R3, and R4 are for outputting reference voltages VREF1, VREF2, VREF3, and VREF4 of different levels. Among the reference voltages VREF1, VREF2, VREF3, VREF4, the reference voltage VREF1 has the lowest voltage level and the reference voltage VREF4 has the highest voltage level.

Each resistor (R1, R2, R3, R4) outputs four reference voltages VREF1, VREF2, VREF3, and VREF4 having higher and higher levels in response to variations in the rectified voltage applied to the channels CH1, CH2, CH3, and CH4. It is preferred to be set to.

Here, the reference voltage VREF1 has a level for turning off the switching circuit 30_1 at the time when the channel LED2 is turned on. More specifically, the reference voltage VREF1 may be set to a level lower than the current detection voltage formed in the current detection resistor Rg by the turn-on voltage of the channel CH2.

The reference voltage VREF2 has a level for turning off the switching circuit 30_2 at the time when the channel LED3 is turned on. More specifically, the reference voltage VREF2 may be set to a level lower than the current detection voltage formed in the current detection resistor Rg by the turn-on voltage of the channel CH3.

The reference voltage VREF3 has a level for turning off the switching circuit 30_3 when the channel LED4 is turned on. More specifically, the reference voltage VREF3 may be set to a level lower than the current detection voltage formed in the current detection resistor Rg by the turn-on voltage of the channel CH4.

The reference voltage VREF4 is preferably set to a level higher than the current detection voltage formed in the current detection resistor Rg by the upper limit level of the rectified voltage.

Meanwhile, the switching circuits 30_1, 30_2, 30_3, and 30_4 may each include a current detection voltage detected by the current detection resistor Rg and reference voltages VREF1, VREF2, VREF3, and VREF4 of the reference voltage generation circuit 20. Compare and perform the turn on and turn off operation.

The switching circuits 30_1, 30_2, 30_3, and 30_4 are connected in parallel to each channel CH1, CH2, CH3, and CH4 through the channel terminals P1, P2, P3, and P4. The switching circuits 30_1, 30_2, 30_3, and 30_4 are commonly connected to a current detection resistor Rg that provides a current detection voltage.

The switching circuits 30_1, 30_2, 30_3, 30_4 are one for turning on the LED lamp 10 by comparing the current detection voltages of the respective reference voltages VREF1, VREF2, VREF3, VREF4 and the current detection resistor Rg. Provide an optional current path.

The switching circuits 30_1, 30_2, 30_3, and 30_4 are provided with a higher level of reference voltage as they are connected to the channels distant from the position where the rectified voltage is applied, LED1, LED2, LED3, and LED4.

Each switching circuit 30_1, 30_2, 30_3, 30_4 includes a comparator 50 and a switching element, and the switching element is preferably composed of an NMOS transistor 52.

The comparator 50 of each of the switching circuits 30_1, 30_2, and 30_3 is applied with a reference voltage to the positive input terminal (+), a current detection voltage is applied to the negative input terminal (-), and a reference voltage and a current detection voltage are output to the output terminal. Output the comparison result.

The operation of the LED lighting apparatus configured as described above with reference to FIGS. 5 and 6 will be described with reference to FIG. 7.

First, when the rectified voltage is in the initial state, the channels are not turned on. Therefore, the current detection resistor Rg provides a low level current detection voltage.

As a result, when the rectified voltage is in the initial state, each switching circuit 30_1, 30_2, 30_3, and 30_4 is connected to the negative input terminal (−) rather than the reference voltages VREF1, VREF2, VREF3, and VREF4 applied to the positive input terminal (+). They are all turned on because they are higher than the applied current detection voltage.

After that, when the rectified voltage rises to reach the turn-on voltage V1 for turning on the channel CH1, the channel CH1 of the LED lamp 10 is turned on. When the channel CH1 of the LED lamp 10 is turned on, the switching circuit 30_1 of the current control circuit 14 connected to the channel CH1 provides a current path.

As described above, when the rectified voltage reaches the turn-on voltage V1 and the current path through the switching circuit 30_1 is turned on, the level of the current detection voltage of the current detection resistor Rg increases. However, since the level of the current detection voltage at this time is low, the turn-on state of the switching circuits 30_1, 30_2, 30_3, 30_4 is not changed.

After that, when the rectified voltage continues to rise to reach the turn-on voltage V2 that turns on the channel CH2, the channel CH2 of the LED lamp 10 is turned on. At this time, the channel CH1 also remains turned on. When the channel CH2 of the LED lamp 10 is turned on, the switching circuit 30_2 of the current control circuit 14 connected to the channel CH2 provides a current path.

As described above, when the rectified voltage reaches the turn-on voltage V2 and the current path through the switching circuit 30_2 is turned on, the level of the current detection voltage of the current detection resistor Rg increases. The level of the current detection voltage at this time is higher than the reference voltage VREF1. Therefore, the NMOS transistor 52 of the switching circuit 30_1 is turned off by the output of the comparator 50. That is, the switching circuit 30_1 is turned off and the switching circuit 30_2 provides an optional current path corresponding to the turning on of the channel CH2.

After that, when the rectified voltage continues to rise to reach the turn-on voltage V3 that turns on the channel CH3, the channel CH3 of the LED lamp 10 is turned on. At this time, the channels CH1 and CH2 also remain turned on. When the channel CH3 of the LED lamp 10 is turned on, the switching circuit 30_3 of the current control circuit 14 connected to the channel CH3 provides a current path.

As described above, when the rectified voltage reaches the turn-on voltage V3 and the current path through the switching circuit 30_3 is turned on, the level of the current detection voltage of the current detection resistor Rg increases. The level of the current detection voltage at this time is higher than the reference voltage VREF2. Therefore, the NMOS transistor 52 of the switching circuit 30_2 is turned off by the output of the comparator 50. That is, switching circuit 30_2 is turned off and switching circuit 30_3 provides an optional current path corresponding to the turn on of channel CH3.

After that, when the rectified voltage continuously rises to reach the turn-on voltage V4 that turns on the channel CH4, the channel CH4 of the LED lamp 10 is turned on. At this time, the channels CH1, CH2, and CH3 also remain turned on. When the channel CH4 of the LED lamp 10 is turned on, the switching circuit 30_4 of the current control circuit 14 connected to the channel CH4 provides a current path.

As described above, when the rectified voltage reaches the turn-on voltage V4 and the current path through the switching circuit 30_4 is turned on, the level of the current detection voltage of the current detection resistor Rg increases. At this time, the level of the current detection voltage is higher than the reference voltage VREF3. Therefore, the NMOS transistor 52 of the switching circuit 30_3 is turned off by the output of the comparator 50. That is, switching circuit 30_3 is turned off, and switching circuit 30_4 provides an optional current path corresponding to the turn on of channel CH2.

Since the reference voltage VREF4 provided to the switching circuit 30_4 is higher than the current detection voltage formed on the current detection resistor Rg by the upper limit level of the rectified voltage even if the rectified voltage continues to rise thereafter, the switching circuit 30_4 remains turned on.

When the rectified voltage falls and falls below the turn-on voltage V4 that turns on the channel CH4, the channel CH4 of the LED lamp 10 is turned off.

When the channel CH4 of the LED lamp 10 is turned off, the channel CH3 is turned on. Therefore, the current control circuit 14 provides an optional current path by the switching circuit 30_3.

After that, the rectified voltage continuously decreases to sequentially turn-on voltage V3 to turn on the channel CH3, turn-on voltage V2 to turn on the channel CH2, and turn-on voltage V1 to turn on the channel CH1. When dropped, the channels CH3, CH2, CH1 of the LED lamp 10 are sequentially turned off.

When the channels CH3, CH2, CH1 of the LED lamp 10 are turned off sequentially, the current control circuit 14 therefore shifts the current path so that the switching circuits 30_3, 30_2, 30_1 select sequentially. Current paths.

The LED lighting apparatus according to the present invention may drive the LED lamp 10 configured as shown in FIGS. 1 to 4 in response to the rise and fall of the rectified voltage.

The LED lamp 10 of the LED lighting apparatus according to the present invention is implemented to include a series (S) and a parallel (P). In addition, the LED lighting apparatus may be designed to provide a voltage corresponding to the number of LEDs arranged in the LED lamp 10.

The LED lighting apparatus according to the present invention having such a design environment may operate normally by a driving capability corresponding to the low voltage of the parallel part P even when the commercial AC voltage drops due to an abnormal or unstable use environment.

The LED lamp 10 according to the present invention may have different operating voltages of the central LED and the LED of the edge part depending on the number of LEDs or the characteristics of the LED elements. In addition, the driving current may vary even when the central LED and the side LED operate at the same voltage. In addition, the LED lamp 10 according to the present invention may be manufactured in a package, in which case the output voltage of the central LED and the outer LED may be different.

Embodiments according to the present invention can be variously modified by the manufacturer. In one example, the LED lamp 10 according to the present invention has been disclosed that both sides are configured in parallel, but is not limited to this, only one of them may be configured in parallel.

In addition, the parallel portion P of the LED lamp 10 according to the present invention may be implemented as shown in FIG.

In the parallel part P of FIG. 8, the second light emitting diodes 18 are arranged in series, two second light emitting diodes 18 are connected in parallel, and each pair of second light emitting diodes connected in parallel ( 18) form a series chain.

That is, the embodiment according to the present invention may be configured such that two or more second light emitting diodes 18 are connected in parallel, and a group of second light emitting diodes 18 connected in parallel forms a series chain.

As described above, in the embodiment according to the present invention, the parallel part P may be configured in various ways as shown in FIGS. 1 to 8.

Claims

A series unit including first light emitting diodes arranged in series in a light emitting area and connected in series; And

And a parallel unit including second light emitting diodes arranged in a line in the emission area and connected in parallel.

The first light emitting diodes and the second light emitting diodes are arranged in a line and the light emitting diode lighting to form a light source.
The method of claim 1,

The light source including the first and second light emitting diodes are driven by a plurality of channels that turn on and turn off sequentially.
The method of claim 1,

The parallel portion is a light emitting diode lamp is formed in each of the both ends of the longitudinal direction of the light emitting region.
The method of claim 3, wherein

And the parallel part includes the second light emitting diodes electrically connected in parallel to both end regions of the first light emitting diodes, and the second light emitting diodes are electrically connected using meandering wiring.
The method of claim 4, wherein

The light source is divided into a plurality of channels that are sequentially turned on and off, the light emitting diode lamp is formed so that at least one of the channels via at least two parallel parts.
The method of claim 1,

Wherein the parallel portion comprises a group of two or more second light emitting diodes connected in parallel, and wherein the one or more groups are configured to form a series chain with respect to the serial portion.
The method of claim 1,

The parallel light emitting diode lamp including a parallel structure connected in parallel with at least two or more diodes.
The method of claim 6,

The parallel unit is a light emitting diode including a multi-stage parallel structure.
The method of claim 1,

And the first and second light emitting diodes of the series portion and the parallel portion are arranged at uniform intervals.
The method of claim 1,

And the second light emitting diodes of the parallel part are arranged at a narrower interval than the first light emitting diode of the series part.
The method of claim 1,

The light emitting diode lamp of claim 1, wherein the individual light emitting diodes constituting the first light emitting diodes and the second light emitting diodes have different emission voltages or different emission currents.
And a parallel part including first light emitting diodes arranged in series in a light emitting area and connected in series, and a parallel part including second light emitting diodes arranged in line in a light emitting area and connected in parallel. The second light emitting diodes are arranged in a line and electrically connected to form a light source, and the light source is divided into a plurality of channels in which turn-on and turn-off are sequentially formed;

A power supply unit providing a rectified voltage converted from commercial power to the light emitting diode lamp; And

And a current control circuit for providing a current path for turning on for each channel of the LED lamp.
The method of claim 12,

The light source includes a plurality of columns including the first light emitting diodes and the second light emitting diodes electrically connected to both ends of the first light emitting diodes, and the plurality of rows are electrically connected in a meandering shape. LED lighting device.
The method of claim 12,

And the light source is formed such that at least one of the channels passes through two or more parallel portions.
The method of claim 12,

And the second light emitting diodes of the parallel part are arranged at a narrower interval than the first light emitting diode of the series part.