KR20110016773A - Light device and socket included in the same - Google Patents

Abstract

PURPOSE: A light illuminating device and a socket for the same are provided to expand the life expectancy of the device using resistive components without capacitors or inductors. CONSTITUTION: A light illuminating device includes a light emitting part(104), the wave rectifier circuit of alternating current power source, and a driving circuit part(102). The driving circuit part converts a first current into an amplified constant current. The driving circuit part outputs a second current to the light emitting part. The brightness of the light illuminating device is increased by increasing the frequency of a conductive current.

Description

LIGHT DEVICE AND SOCKET INCLUDED IN THE SAME}

The present invention relates to a lighting device having a small size and an excellent power factor and a socket included therein.

Generally, fluorescent lamps and incandescent lamps have been mainly used, but in recent years, LED lamps have replaced incandescent lamps for eco-friendly and CO ₂ emission reduction.

Conventional LED lighting is basically composed of a plurality of light emitting diodes (LEDs) and a ballast driving them.

The ballasts are magnetic and electronic, and the inverter type of the electronics drives the LEDs through a PWM (Pulse Width Modulation) control method, that is, using a PWM driving method, a rectifier circuit, a noise filter, and a PWM controller. It includes.

The noise filter removes noise generated by PWM driving.

The PWM control unit controls the PWM drive using a plurality of capacitors and inductors.

The LED lamp including such a ballast is integrated, so when some of the elements of the LED lamp have reached the end of their life, for example, when the ballast has reached the end of their life, the LED lamp must be discarded and a new LED lamp must be used.

In general, the lifetime of the LED is about 50000 hours, whereas the lifetime of the capacitors is about 3000 to 8000 hours. As a result, the lifetime of the capacitors and the inductors before the LEDs have reached the end of life, there is a problem that the LED lamp must be replaced after about 3000 hours.

In addition, since the ballast uses many elements (parts), the size and cost of the ballast have to be increased. Of course, the reliability of the ballast is inevitably deteriorated due to many devices.

In addition, the PWM driving method is a method of continuously providing a constant DC current to the LEDs, and thus, power consumption of the LED lamp cannot be minimized.

Moreover, since the LED lamp uses a plurality of capacitors and inductors, a phase difference may occur between the current and the voltage provided to the LEDs due to the capacitors and the inductors. As a result, there is a problem that the power factor of the LED lamp is lowered so that the efficiency of the LED lamp is not more than 85%.

Conventional LED lamps had to be provided with a power factor correction circuit to solve this power factor problem, and as a result, the size of the ballast is further increased.

It is a first object of the present invention to provide a lighting element comprising a small number of internal elements, in particular a driving element which does not include a capacitor and an inductor at all, and a socket included therein.

It is a second object of the present invention to provide a lighting element which enables the detachment of a socket from a body to extend its life.

It is a third object of the present invention to provide a lighting device and a socket included therein that reduce power consumption and improve power factor.

It is a fourth object of the present invention to provide a method of maximizing the brightness of a lighting device by energizing a constant current only above a threshold voltage in a cycle of twice the AC input power.

In order to achieve the above object, the lighting device according to an embodiment of the present invention includes a light emitting unit having at least one light emitting device; And a driving circuit unit for changing the input first current into a constant current. Here, the second current output from the driving circuit unit is provided to the light emitting unit, and the second current is a larger current than the first current.

Lighting device according to another embodiment of the present invention includes a light emitting unit having at least one light emitting device; And a driving circuit unit for driving the light emitting device using at least one constant current diode.

Lighting device according to another embodiment of the present invention is a heat dissipating body portion; A substrate arranged on the first side of the body portion; At least one light emitting module arranged on the substrate; And a heat transfer pad part arranged between the body part and the substrate.

Lighting device according to another embodiment of the present invention is a heat dissipating body portion; A substrate arranged on the first side of the body portion; At least one light emitting module arranged on the substrate; And the driving circuit unit arranged on a second surface of the body portion opposite to the first surface, and configured to change an input current into a constant current portion. Here, the resistance of the constant current unit depends on the magnitude of the input voltage and the light emitting module.

In a socket used for a lighting device having a main body according to an embodiment of the present invention, the socket is detachable from the main body, and the socket includes a rectifying circuit unit for rectifying the input power.

Since the driving unit of the lighting device according to the present invention is composed of a small number of elements, the size and cost of the driving unit can be reduced and the reliability of the driving unit can be improved.

In addition, since the lighting device uses only a resistive component without using a capacitor or an inductor, the life of the lighting device can be extended. Here, since the socket is detachable from the main body and can be easily replaced when necessary, the utilization of the lighting element can be improved.

In addition, since the lighting device does not use a capacitor or an inductor, a phase difference between the current and the voltage provided to the light emitting devices does not occur, and as a result, the power factor may be improved to improve the efficiency of the lighting device.

In addition, since the current output from the driving circuit portion provided to the light emitting element is discontinuous, power consumption of the lighting element can be reduced. Of course, the time difference between the pulses for the discontinuity is implemented in a time range in which a person does not notice flicker of the light emitting device.

As the invention allows for various changes and numerous embodiments, particular embodiments will be illustrated in the drawings and described in detail in the written description. However, this is not intended to limit the present invention to specific embodiments, it should be understood to include all modifications, equivalents, and substitutes included in the spirit and scope of the present invention. Like reference numerals are used for like elements in describing each drawing.

When a component is referred to as being "connected" or "connected" to another component, it may be directly connected to or connected to that other component, but it may be understood that other components may be present in between. Should be. On the other hand, when a component is said to be "directly connected" or "directly connected" to another component, it should be understood that there is no other component in between.

The terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting of the invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In this application, the terms "comprise" or "have" are intended to indicate that there is a feature, number, step, operation, component, part, or combination thereof described in the specification, and one or more other features. It is to be understood that the present invention does not exclude the possibility of the presence or the addition of numbers, steps, operations, components, components, or a combination thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art. Terms such as those defined in the commonly used dictionaries should be construed as having meanings consistent with the meanings in the context of the related art, and are not construed in ideal or excessively formal meanings unless expressly defined in this application. Do not.

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

1 is a view showing a lighting device according to an embodiment of the present invention.

Referring to FIG. 1, the lighting element of the present embodiment functions as a lighting lamp, and includes a rectifying circuit part 100, a driving circuit part 102, and a light emitting part 104.

According to one embodiment of the invention, the lighting device is an LED lamp using light emitting diodes (LEDs).

The rectifier circuit unit 100 is arranged at an input terminal of the lighting device and generates direct current by half-wave rectifying or full-wave rectifying AC power input from the outside, for example, 110V or 220V AC power. However, in order for the lighting device to function as a lighting lamp, a person must recognize that the lighting device continuously emits light, so that the rectifying circuit unit 100 fully rectifies the input AC power as shown in FIG. 1. desirable.

When the lighting device uses LEDs, since the LEDs are turned on after a specific voltage is applied to the LEDs, the current output from the rectifying circuit unit 100 is a pulse waveform as shown in FIG. 1. Has

That is, the rectifier circuit unit 100 rectifies the input AC power to generate a voltage waveform and a current waveform as shown in FIG. 1.

The driving circuit unit 102 is connected to the rectifying circuit unit 100, outputs a constant current at a voltage provided from the rectifying circuit unit 100, and applies the constant current to the light emitting unit 104.

The voltage and current output from the driving circuit unit 102 may have a pulse waveform as shown in FIG. 1.

Looking at the current waveform, there is a time difference Δt between the pulses. However, since the time difference [Delta] t, the experimental result of 4 ms is smaller than the minimum time (14 ms) at which a person can perceive the blinking of the lighting element, the lighting element is lighted even though the current is discontinuous. Recognize that continually radiates.

The light emitting unit 104 includes a plurality of light emitting devices, and a plurality of LEDs having a long lifetime and excellent luminous efficiency may be used as the light emitting devices. Of course, the light emitting element is not limited to LED as long as it emits light.

In short, in the lighting element of this embodiment, the current output from the drive circuit section 102 is discontinuous, and as described later, the PWM control method is not used.

Hereinafter, the circuit configuration of the lighting device of the present invention will be described with reference to the accompanying drawings.

2 is a diagram showing the circuit configuration of a lighting device according to an embodiment of the present invention.

Referring to FIG. 2, the lighting device of the present embodiment includes a rectifying circuit unit 100, a driving circuit unit 102, and a light emitting unit 104.

The rectifier circuit unit 100 includes a fuse F, a varistor RV which is a nonlinear semiconductor resistance element, and a rectifier circuit.

The rectifying circuit is a circuit for half-wave rectifying or full-wave rectifying the input AC current, and is preferably implemented as a full-wave rectifying circuit in consideration of the lighting device as a lamp.

According to an embodiment of the present invention, the rectifier circuit may be implemented as a bridge circuit composed of four diodes D1 to D4 as shown in FIG.

Looking at the connection relationship of the rectifier circuit unit 100, one terminal of the fuse (F) and the varistor (RV) is connected to the positive electrode terminal, the node between the first diode (D1) and the second diode (D2) ( n1).

In addition, the other terminal of the varistor RV is connected to the negative electrode terminal and is connected to the node n2 between the third diode D3 and the fourth diode D4.

The rectifier circuit unit 100 is implemented to be included in the socket as described below in consideration of the ease of replacement.

Next, referring to the driving circuit unit 102, the driving circuit unit 102 includes a constant current unit 200, a temperature compensating unit 202, and an amplifying unit 204.

The constant current unit 200 changes the input small current i ₁ into an amplified constant current and may be formed of, for example, at least one constant current diode.

For example, the constant current unit 200 may include a first sub constant current unit 210 including two constant current diodes D5 and D6 connected in series with each other, and two constant current diodes D7 and D8 connected in series with each other. It may include a second sub constant current unit 212 made up.

Connecting the constant current diodes in each of the sub constant current parts 210 and 212 in series is to withstand the withstand voltage. Specifically, assuming that 110V AC power is applied to the lighting device and that each of the light emitting devices has a voltage of 3V, when the total of the light emitting devices is 102V, 8V is applied between the base and the collector of the transistor TR. Can take That is, the voltage V _BC between the base and the collector of the transistor TR is 8V. Here, since the constant current diodes D5 to D6 of the sub electrostatic current units 210 and 212 are connected between the base and the collector of the transistor TR, the constant current diodes D5 to D6 should be able to withstand 8V. Therefore, the user can determine the number of constant current diodes in consideration of the withstand voltage. That is, the user determines the number of the constant current diodes in consideration of the input AC voltage and the number of the light emitting elements.

Looking at the arrangement of the sub constant current units 210 and 212, the constant current diodes D5 and D6 in the first sub constant current unit 210 and the constant current diodes D7 and D8 in the second sub constant current unit 212 are described. They are connected in parallel to each other. This is to finely adjust the magnitude of the current i ₂ output from the drive circuit section 102.

That is, the number and arrangement method of the constant current diodes of the constant current unit 200 are determined in consideration of the adjustment of the withstand voltage and the current i ₂ .

In the above, each of the sub constant current units 210 and 212 includes the same number of constant current diodes, but may include different numbers of constant current diodes. In addition, although the constant current unit 200 is illustrated as including only two sub constant current units 210 and 212, it may include only one sub constant current unit or may include three or more sub constant current units. In addition, at least one of the constant current diodes used in the constant current unit 200 may have different characteristics from other diodes.

Referring back to FIG. 2, the temperature compensator 202 compensates for the temperatures of the constant current diodes D5 to D8.

The amplifier 204 is composed of a transistor TR and a plurality of resistors, for example, two resistors R2 and R3.

The transistor TR is, for example, an amplifying NPN transistor and generates a lot of heat. However, since the constant current diodes adjacent to the transistor TR are sensitive to heat, the transistor TR may be arranged to be spaced apart from the constant current diodes by a predetermined distance or more. Detailed description thereof will be described later with reference to the accompanying drawings.

Looking at the connection relationship of the transistor TR, the collector of the transistor TR is connected to the node n5, the base is connected to the node n6.

The resistor R2 is connected to the node n6, that is, to the base of the transistor TR.

Resistor R3 is connected to the emitter of transistor TR and is connected in parallel to resistor R2.

The amplification factor G of the amplifier 204 having such a structure is expressed by Equation 1 below.

Here, β means the amplification factor of the transistor TR.

That is, the amplifier 204 amplifies the small current i ₁ input to the constant current unit 200 with the amplification factor G and outputs a current i ₂ according to the amplification.

Considering the constant current unit 200 and the amplifying unit 204 as a whole, the current i ₂ output from the amplifying unit 204 includes the constant current diodes of the constant current unit 200 and the resistances of the amplifying unit 204 ( R2 and R3). Thus, the user can set the constant current diodes and the resistors R2 and R3 appropriately to generate the desired current i ₂ .

In general, as the number of light emitting devices increases, the current i ₂ applied to the light emitting devices also needs to increase. Accordingly, the user sets the number and arrangement of the constant current diodes and the resistors in consideration of the number of the light emitting elements and the luminance magnitude. Of course, it is also possible to control the current i ₂ using only constant current diodes, but using only the constant current diodes can complicate the drive circuit. Therefore, it is desirable to control the current i ₂ using the constant current diodes and the resistors together.

According to an embodiment of the present invention, the current i ₂ applied to the light emitting elements of the light emitting unit 104 has a waveform as shown in FIG. 1.

In other words, unlike the conventional LED lamp which generates a constant current in a PWM method, the lighting device of the present embodiment generates the constant current i ₂ using the constant current unit 200 and the amplifying unit 204. Here, the constant current unit 200 is not limited to a constant current diode as long as it generates a constant current, but is preferably made of the constant current diode in consideration of the control of the withstand voltage and the constant current (i ₂ ).

Hereinafter, the lighting element of the present invention and conventional LED lighting lamps will be compared.

1. Lifespan

Conventional LED lighting uses a ballast consisting of a rectifier circuit, a noise filter and a PWM control unit to drive the LEDs. Here, the PWM controller keeps the current provided to the LEDs constant by varying the width of the pulses, and uses a plurality of capacitors and inductors for the PWM control.

In general, the lifetime of the capacitors and inductors (about 3000 to 8000 hours) is considerably shorter than the lifetime of the LED (about 50000 hours). Nevertheless, since the LED lamp is integrally implemented, the LED lamp must be replaced with a new LED lamp even though the LEDs can be used for a longer time when the capacitors and the inductors have reached the end of their life.

On the other hand, the lighting element of the present invention uses only transistors (TR), constant current diodes and resistors that have a lifespan longer than the LED without using capacitors and inductors with short lifetimes. As a result, the lifetime of the lighting element can be considerably longer compared to conventional LED lighting.

2. Reliability and Price

The ballast of a conventional LED lamp consists of the rectifier circuit, the noise filter and the PWM control unit, the PWM control unit is composed of many internal elements. Thus, the size and cost of the ballast are increased and the reliability of the ballast is lowered. In addition, the PWM driving method can generate considerable noise.

On the other hand, in the lighting device of the present invention, since the driving part including the rectifying circuit part 100 and the driving circuit part 102 uses only a few internal elements, the size of the driving part can be considerably smaller than that of the conventional ballast. have. In particular, since the rectifying circuit unit 100 of the driving unit is included in the socket as described below, only the driving circuit unit 102 is arranged only in the main body, and as a result, the number of parts of the driving unit arranged in the main body may be further reduced.

In addition, since the driver uses a small number of internal elements, the cost of the driver may be reduced and reliability may be improved.

In addition, since the illumination element outputs the current i ₂ using only a resistor or the like, little noise is generated.

3. Current control method

Conventional LED lamps use a PWM control method to keep the magnitude of the current applied to the LEDs above the minimum that the LEDs can emit. That is, in a conventional LED lamp, the LEDs continuously emit light while the power is turned on. As a result, the power consumption of the LED lamp is increased.

On the other hand, in the lighting device of the present invention, as shown in FIG. 1, the current i ₂ applied to the light emitting devices is not continuous but discontinuous. However, the time difference Δt between the pulses is small so that a person does not notice flicker of the lighting device. As a result, the lighting element can function as a lamp while reducing power consumption. In another aspect, the magnitude of the current (i ₂ ) applied to the light emitting elements may be maintained larger than that of the current of a conventional LED lamp, so that the brightness of the lighting device may be higher than that of the LED lamp. In this case, the power consumption of the lighting element is similar to that of a conventional LED lamp.

4. Power factor

Conventional LED lamps use a large number of capacitors and inductors, so that a phase difference occurs between the current and voltage applied to the LEDs. As a result, the power factor of the LED lamp is lowered, so that it is difficult to realize the efficiency of the LED lamp more than 85%. Therefore, the conventional LED lamp had to be provided with a power factor correction circuit separately.

On the other hand, since the light emitting device of the present invention uses only resistors and the like without using capacitors and inductors, the phase difference between current and voltage applied to the light emitting devices does not occur, so the power factor is 1 in theory. As a result, the efficiency of the light emitting device of the present invention is considerably higher and can be used for lighting of various standards. In addition, since the lighting device of the present invention has an excellent power factor, the lighting device does not require a separate power factor correction circuit, unlike a conventional LED lamp.

Hereinafter, the actual implementation of the lighting device of the present invention will be described with reference to the accompanying drawings.

3 is a view showing the external appearance of the lighting device according to an embodiment of the present invention, Figure 4 is a view showing the structure of a socket according to an embodiment of the present invention.

Referring to FIG. 3, the lighting element of the present embodiment includes a main body 300 and sockets 302 and 304.

The main body 300 includes an upper cover 310 and a lower cover 312, and protects the light emitting devices and the driving circuit 102 located therein.

The upper cover 310 is made of a material that can transmit light emitted from the light emitting device well.

The lower cover 312 is made of a conductor, it may be implemented to have a concave-convex structure as shown in Figure 3 for the heat dissipation effect.

The sockets 302 and 304 are coupled to the side of the main body 300 as shown in FIG. 3, for example, screwed to the main body 300 through fastening parts 400 in which holes are formed.

One of the sockets 302 and 304 of the present invention includes a rectifying circuit 100 as shown in FIG. Of course, although not shown in detail, the rectifier circuit unit 100 has a structure in which diodes D1 to D4 are arranged on a specific substrate.

Hereinafter, it is assumed that the rectifier circuit unit 100 is included in the socket 302 of the sockets 302 and 304.

According to an embodiment of the present invention, the electrodes 320 which are the supply passages of the power may be formed through the substrate of the rectifier circuit unit 100 as shown in FIG. 4.

That is, the rectifier circuit unit 100 of the lighting device of the present embodiment may be included in the socket 302, and the driving circuit unit 102 and the light emitting unit 104 may be included in the main body 300. Therefore, when the fuse F of the rectifier circuit unit 100 reaches the end of its life, only the socket 302 may be replaced to continuously use the lighting device.

Hereinafter, an internal structure of the main body 300 including the driving circuit unit 102 and the light emitting unit 104 will be described with reference to the accompanying drawings.

5 is a cross-sectional view illustrating an internal structure of a main body of a lighting device according to a first embodiment of the present invention, and FIG. 6 is a view illustrating a connection relationship between light emitting modules according to an embodiment of the present invention. 5 (A) is sectional drawing which cut | disconnected the main body 300 in the vertical direction, and FIG. 5 (B) is sectional drawing which cut | disconnected the main body 300 in the longitudinal direction.

Referring to FIGS. 5A and 5B, in the main body 300, there is a body portion 500 made of aluminum (Al), which is a conductor.

According to the exemplary embodiment of the present invention, the light emitting part 104 is arranged on one surface (first surface) of the body part 500, and the driving circuit part 102 is disposed on the other surface (second surface) of the body part 500. Are arranged.

The light emitting unit 104 may include a first substrate 502, at least one light emitting module 504, and a heat transfer pad unit 506. Of course, the heat transfer pad part 104 may not be included in the light emitting part 104 but may exist separately.

The first substrate 502 is a heat radiation conductor made of a specific metal.

The light emitting module 504 is arranged on one surface (first surface) of the first substrate 502 as shown in FIGS. 5A and 5B. Here, the upper surface of the first surface of the first substrate 502 is insulated plating.

In addition, the light emitting modules 504 are arranged in series in the longitudinal direction on the first surface of the first substrate 502. As a result, the current output from the driving circuit unit 102 flows sequentially through the light emitting modules 504. Here, the light emitting module 504 may include only one light emitting device or may include a plurality of light emitting devices.

However, each of the light emitting modules 504 preferably includes a plurality of light emitting devices. For example, suppose that each light emitting module 504 consists of three LEDs connected in parallel with each other as shown in FIG. Here, each light emitting module 504 may include a corresponding mount surface, three LEDs, three anode electrodes, and three cathode electrodes arranged on the mount surface.

The current output through the first LEDs 602a, 602b and 602c and the first cathode electrodes 604a, 604b and 604c is passed through the second anode electrodes 610a, 610b and 610c to the second LEDs 608a. , 608b and 608c. Subsequently, the current passing through the second LEDs 608a, 608b and 608c and the second cathode electrodes is applied to the third LEDs in the rear stage.

If only one LED exists in the light emitting module 504, if the LED fails, no current may flow to the light emitting modules 504 arranged after the light emitting module 504. However, as shown in FIG. 6, when the light emitting module 504 includes three LEDs connected in parallel with each other, current may flow through the remaining LEDs to the light emitting modules 504 after the failure of one LED. . For example, even if one 608a of the second LEDs 608a, 608b, and 608c fails, current may flow through the remaining LEDs 608b and 608c to the downstream light emitting modules 504. As a result, the lighting device can normally perform a light emitting operation.

The heat transfer pad part 506 may be formed on a second surface of the first substrate 502 opposite to the first surface, and may be formed of a heat resistor having low thermal resistance. In general, since a lot of heat is generated from the light emitting elements, the generated heat must be released to the outside. Therefore, in the lighting device of the present embodiment, the first substrate 502 and the body portion 500 are formed as heat radiating conductors so that heat generated from the light emitting elements is transferred through the first substrate 502 and the body portion 500. Release to the outside.

However, the second surface of the first substrate 502 may not be completely flat. Therefore, the lighting element of this embodiment arranges the heat transfer pad portion 506 on the second surface of the first substrate 502 to improve flatness. In this case, since the heat transfer efficiency may be reduced due to the heat transfer pad part 506, the heat transfer pad part 506 is formed of a material having low heat resistance to maintain the efficiency of heat transfer. Here, the material of the heat transfer pad part 506 may be a non-insulator or an insulator.

The driving circuit unit 102 is arranged on the second surface of the body unit 500, which is a heat radiating conductor, and may be formed of the driving circuit elements 510 such as the second substrate 508 and the constant current diode. That is, drive circuit elements 510 are arranged over the second substrate 508. Here, the second substrate 508 is an insulator.

According to one embodiment of the invention, the second substrate 508 of the driving circuit portion 102 is a predetermined distance from the second surface of the body portion 500 as shown in Figs. 5A and 5B. May be arranged to be spaced apart. This is because the driving circuit elements 510 protrude to the rear surface of the second substrate 508 through the through hole. In detail, since the body part 500 is a conductor, the driving circuit elements 510 may be electrically connected to each other and short-circuited when the second substrate 508 directly contacts the body part 500. .

Structurally, as shown in FIG. 5A, grooves may be formed at both sides of the rear surface of the body part 500, and the second substrate 508 may be inserted into the grooves.

The upper cover 310 is coupled to the body portion 500, and is made of a material that can pass the light output from the light emitting elements.

The lower cover 312 is coupled to the body portion 500, made of a metal material for heat dissipation. Here, the lower cover 312 may be made of a structure for widening the cross-sectional area, for example, uneven structure for heat dissipation.

7 is a diagram illustrating a structure of a driving circuit unit according to an embodiment of the present invention.

Referring to FIG. 7, the driving circuit unit 102 may include the second substrate 700 (corresponding to 508 of FIG. 5), the element array region 702, the heat dissipation substrate 706, the transistor TR, and the heat dissipation unit 708. Include.

In the material arrangement region 702, elements other than the transistor TR, that is, the constant current diodes D5 to D8 and the resistors R2 and R3 of the elements of the driving circuit unit 102 are arranged.

The transistor TR and the heat dissipation portion 708 are arranged on the heat dissipation substrate 706. Here, since the heat dissipation substrate 706 is made of a conductor, heat emitted from the transistor TR is dissipated through the heat dissipation substrate 706. The heat emitted from the transistor TR is also dissipated by the heat dissipation unit 708.

According to an embodiment of the present invention, the material array region 702 in which the elements are arranged is spaced apart from the heat dissipation substrate 706 by a predetermined distance, so that heat emitted from the transistor TR is transferred to the element array region 702. It may not affect the elements within.

In other words, in the drive circuit section 102 of the lighting element of the present invention, heat emitted from the transistor TR is dissipated through the heat dissipation substrate 706 and the heat dissipation unit 708. In other words, the driving circuit unit 102 is implemented such that heat emitted from the driving circuit unit 102 is dissipated in the driving circuit unit 102 itself.

8 is a cross-sectional view showing the internal structure of the main body of the lighting device according to the second embodiment of the present invention, Figure 9 is a view showing the structure of the light emitting modules according to an embodiment of the present invention.

Referring to FIG. 8, the lighting device of the present embodiment includes a body portion 800, a heat transfer pad portion 802, a substrate 804, light emitting modules 808, and a driving circuit portion 810, which are heat radiating conductors.

The substrate 804 is made of an insulator material, unlike the first embodiment made of a conductor, and may be made of, for example, FR4.

Each light emitting module 808 may include only one light emitting device, but may include a plurality of light emitting devices as shown in FIG. 9. For example, three light emitting elements 902a, 902b and 902c are arranged on the first mount surface 900, and three light emitting elements 910a, 910b and 910c are arranged on the second mount surface 906. Can be.

Looking at the upper surface of the substrate 804 in detail, as shown in Fig. 9A, first pattern portions are formed between the mount surfaces. For example, a first pattern portion 914 is formed between the mount surfaces 900 and 906.

The first pattern portion 914 is a conductor, and one or more holes 916 are formed therein.

The holes 916 are connected to the rear surface of the substrate 804 through the substrate 804, and second pattern portions, which are conductors, are formed on the rear surface of the substrate 804 as shown in FIG. 9B. For example, the first pattern portion 914 positioned between the first mounting surface 900 and the second mounting surface 906 and the second pattern portion 920 connected through the holes 916 are the substrate 804. Is formed on the back.

The inner surface of the holes 916 is plated with a conductive material, and as a result, heat emitted from the light emitting elements is formed into the first pattern portion, the corresponding holes, the corresponding second pattern portion, the heat transfer pad portion 802 and the body portion 800. It is emitted through the outside. However, the heat transfer pad part 802 should be made of an insulator so that the second patterns formed on the rear surface thereof are not electrically connected.

The embodiments of the present invention described above are disclosed for purposes of illustration, and those skilled in the art having ordinary knowledge of the present invention may make various modifications, changes, and additions within the spirit and scope of the present invention. Should be considered to be within the scope of the following claims.

1 is a view showing a lighting device according to an embodiment of the present invention.

2 is a diagram showing the circuit configuration of a lighting device according to an embodiment of the present invention.

3 is a view showing the external appearance of the lighting device according to an embodiment of the present invention.

4 is a view showing the structure of a socket according to an embodiment of the present invention.

5 is a cross-sectional view showing the internal structure of the main body of the lighting device according to the first embodiment of the present invention.

6 is a diagram illustrating a connection relationship between light emitting modules according to an embodiment of the present invention.

7 is a diagram illustrating a structure of a driving circuit unit according to an embodiment of the present invention.

8 is a cross-sectional view showing the internal structure of the main body of the lighting device according to a second embodiment of the present invention.

9 is a diagram illustrating the structure of light emitting modules according to an embodiment of the present invention.

Claims (31)

A light emitting unit having at least one light emitting element; And A driving circuit unit for changing the input first current into a constant current, And a second current output from the driving circuit unit is provided to the light emitting unit, and the second current is a current larger than the first current. The method of claim 1, wherein the driving circuit unit, A constant current unit changing the first current into a constant current; And And an amplifier connected to the constant current unit and amplifying the first current to the second current. The method of claim 2, wherein the constant current unit comprises at least one constant current diode, The amplification unit, A transistor connected with the constant current diode; And And a plurality of resistors connected to the transistor and used for the amplification. 4. The constant current diode of claim 3 wherein said constant current diode is coupled to a base and a collector of said transistor, one of said resistors coupled to an emitter of said transistor, and the other resistor coupled to a base of said transistor and said constant current diode. Illumination element, characterized in that. The method of claim 2, wherein the constant current unit, A first sub constant current unit including a plurality of first constant current diodes connected in series with each other; And And a second sub-constant current unit connected to the first constant current diodes in parallel and composed of a plurality of second constant current diodes connected in series with each other. The method of claim 1, wherein the second current is implemented in the form of pulses at a period of twice the AC input frequency, wherein the time difference between the pulses is smaller than the time that a person can recognize the flicker of the light emitting device. An illumination element characterized by the above-mentioned. The method of claim 1, wherein the lighting element, Further comprising a rectifier circuit portion connected to the driving circuit portion, The rectifier circuit unit, At least one fuse; And An illumination element comprising a plurality of diodes constituting a bridge circuit. According to claim 7, wherein the light emitting portion is composed of LED modules arranged in series with each other, the driving circuit portion and the light emitting portion is included in the main body of the lighting element, the rectifier circuit portion is included in a socket connected to the main body , Illumination element, characterized in that the main body and the socket can be separated. The method of claim 8, wherein the main body, A heat dissipation conductor body part; A conductor substrate arranged on the first side of the body portion; The LED modules arranged on one surface of the substrate; A heat transfer pad part arranged between the body part and the substrate; And The driving circuit portion arranged on a second surface of the body portion opposite to the first surface, Each LED module has a plurality of LEDs arranged in parallel, wherein the driving circuit portion is spaced apart from the second surface of the body portion by a predetermined distance. The method of claim 8, wherein the main body, A heat dissipation conductor body part; A non-conductive substrate arranged on the first side of the body portion; The LED modules arranged on the substrate; First pattern portions which are conductors arranged between neighboring LED modules on the substrate; Second pattern portions which are conductors arranged on a surface of the substrate opposite to a surface on which the first pattern portions are arranged; A heat transfer pad part arranged between the body part and the first substrate and an insulator; And The driving circuit portion arranged on a second surface of the body portion opposite to the first surface, Each LED module has a plurality of LEDs arranged in parallel, the driving circuit portion is arranged spaced apart from the second surface of the body portion, at least one of the first pattern portion is a second pattern portion and one or more holes Lighting element, characterized in that electrically connected through. The method of claim 7, wherein the light emitting portion is arranged on a first surface of the main body, and the driving circuit portion is arranged on a second surface opposite to the first surface of the main body, The driving circuit unit, A drive circuit board; A constant current unit arranged on the driving circuit board; A heat dissipation substrate formed on the driving circuit board; The transistor arranged on the heat dissipation substrate; And A heat dissipation unit connected to the transistor on the heat dissipation substrate, And the constant current unit and the transistor are spaced apart from each other. A light emitting unit having at least one light emitting element; And And a driving circuit unit for driving the light emitting device using at least one constant current diode. The method of claim 12, wherein the driving circuit unit, The constant current diode; A transistor connected with the constant current diode; And And at least one resistor connected to the transistor and used for the amplification. The method of claim 13, wherein the lighting element, Further comprising a rectifier circuit portion connected to the driving circuit portion, The rectifier circuit unit, At least one fuse; And An illumination element comprising a plurality of diodes constituting a bridge circuit. A heat dissipation conductor body part; A substrate arranged on the first side of the body portion; At least one light emitting module arranged on the substrate; And And a heat transfer pad portion arranged between the body portion and the substrate. The method of claim 15, wherein the lighting element, And the driving circuit portion arranged on a second surface of the body portion opposite to the first surface, wherein the light emitting module has at least one LED. 17. The method of claim 16, wherein the substrate is a conductor, and the light emitting module includes at least one light emitting element arranged on an insulated portion of the substrate, and the driving circuit unit includes at least one constant current diode. Lighting elements. The method of claim 17, wherein the driving circuit unit, A drive circuit board; The constant current diode arranged on the drive circuit board; A heat dissipation substrate formed on the driving circuit board; A transistor arranged on the heat dissipation substrate and connected to the constant current diode; And A heat dissipation unit connected to the transistor on the heat dissipation substrate, And said constant current diode and said transistor are arranged spaced apart from each other. The lighting device as claimed in claim 16, wherein the driving circuit unit is spaced apart from the second surface of the body unit by a predetermined distance. The method of claim 16, wherein the substrate is an insulator, the light emitting module includes at least one light emitting device, the heat transfer pad portion is an insulator, The light emitting unit, First pattern portions which are conductors arranged between adjacent light emitting elements on the substrate; And And further comprising second pattern portions which are conductors arranged on a surface opposite to the surface on which the first pattern portion is arranged, wherein at least one of the first pattern portions is electrically connected to the second pattern portion through one or more holes. Lighting device, characterized in that connected to. The apparatus of claim 16, wherein the body part, the substrate, the light emitting module, the heat transfer pad part, and the driving circuit part are included in a main body. The lighting device further comprises a socket coupled to the body, The socket is detachable from the main body, the socket is a lighting device, characterized in that the rectifier circuit portion for rectifying the input power. A heat dissipation conductor body part; A substrate arranged on the first side of the body portion; At least one light emitting module arranged on the substrate; And The driving circuit unit is arranged on a second surface of the body portion opposite to the first surface, and converts an input current into a constant current unit. The resistance of the constant current unit is a lighting device, characterized in that depending on the magnitude of the input voltage and the light emitting module. 23. The method of claim 22, wherein the constant current portion comprises at least one constant current diode, the lighting element further comprises a heat transfer pad portion arranged between the body portion and the substrate, And the light emitting module has at least one LED. The lighting device of claim 23, wherein the substrate is a conductor and the light emitting module comprises at least one LED arranged over an insulated portion of the substrate. The method of claim 22, wherein the driving circuit unit, A drive circuit board; The constant current diode arranged on the drive circuit board; A heat dissipation substrate formed on the driving circuit board; A transistor arranged on the heat dissipation substrate and connected to the constant current diode; And A heat dissipation unit connected to the transistor on the heat dissipation substrate, And said constant current diode and said transistor are arranged spaced apart from each other. The lighting device of claim 22, wherein the driving circuit unit is spaced apart from the second surface of the body unit by a predetermined distance. The method of claim 22, wherein the substrate is an insulator, the light emitting module includes at least one light emitting device, and the heat transfer pad part is an insulator. The light emitting unit, First pattern portions which are conductors arranged between adjacent light emitting elements on the substrate; And And further comprising second pattern portions which are conductors arranged on a surface opposite to the surface on which the first pattern portion is arranged, wherein at least one of the first pattern portions is electrically connected to the second pattern portion through one or more holes. Lighting device, characterized in that connected to. The method of claim 22, wherein the body portion, the substrate, the light emitting module and the driving circuit portion is included in the main body, The lighting device further comprises a socket coupled to the body, The socket is detachable from the main body, characterized in that the rectifier circuit portion for rectifying the input power is arranged in the socket. In the socket used for the lighting element having a body, The socket is detachable from the main body, the socket is used in the lighting element, characterized in that the rectifier circuit portion for rectifying the input power. The method of claim 29, wherein the rectifier circuit unit, Rectifying substrates; fuse; And And a plurality of diodes arranged on said rectifying substrate, said plurality of diodes being connected to said fuse. The method of claim 29, wherein the main body, A heat dissipation conductor body part; A substrate arranged on the first side of the body portion; At least one light emitting module arranged on the substrate; A heat transfer pad part arranged between the body part and the substrate; And The driving circuit portion arranged on a second surface of the body portion opposite to the first surface, And the light emitting module has at least one LED, and the driving circuit unit includes at least one constant current diode.

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