KR20110035135A - The method for connecting power of led lamp for substituting fluorescent lamp and the led lamp thereby - Google Patents

Abstract

PURPOSE: A method for connecting the power of an LED lamp for replacing a fluorescent lamp and the LED lamp thereby are provided to enable a user to connect the LED lamp to various kinds of stabilizers by using a base pin. CONSTITUTION: One of power connectors(107,108) is connected to an LED lamp. Another power connector is connected to a limited resistance value within an allowable power loss range. A beam(105) is formed to secure an open space between a pin and an electric wire. A diffusion plate is fixed by a diffusion plate support(106).

Description

The method for connecting power of LED lamp for substituting fluorescent lamp and the LED lamp thereby

The present invention relates to a power connection method of the LED lamp for replacing the fluorescent lamp and LED lamp by the same, and more specifically, two pairs of power connectors in order to be able to directly plug in the LED lamp without removing various types of ballasts of the conventional fluorescent lamp Only one pair is connected.

Types of artificial light sources include incandescent lamps with high melting point, such as metal coils or tungsten wires in vacuum or gas-sealed glass spheres, and halogen bulbs injecting halogen elements into glass bulbs to further suppress evaporation of tungsten. For example, there are discharge lamps using gas discharge such as arc discharge or glow discharge, fluorescent lamps coated with fluorescent material inside the discharge tube, and solid state light sources such as EL lamps, OLED lamps and LED lamps.

Fluorescent lamp is a kind of low pressure mercury lamp that uses hot cathode to discharge mercury in discharge tube and discharge it at low voltage, and strong ultraviolet rays with a wavelength of 253.7 nm generated by discharge stimulate the fluorescent paint on the wall of the tube to generate strong fluorescence.

The tungsten filament of the hot cathode is a double coil, and an oxide film such as barium (Ba) is coated to facilitate the release of hot electrons.

Ballasts for fluorescent lamps are divided into magnetic, semiconductor, and electronic systems. High-end electronic ballasts with excellent electrical safety, easy system design, and long lamp life have emerged as ballasts suitable for consumer needs.

A light emitting diode (LED) device is a semiconductor device that generates light by flowing a current in a forward direction to a PN junction. Light emitting diode devices using semiconductors are highly efficient in converting electrical energy to light energy and have a long lifespan of more than 5 to 10 years, which greatly reduces power consumption and maintenance costs. Is getting.

In particular, since there is no need to use environmentally harmful substances such as mercury, interest in LED lamps for replacing fluorescent lamps is increasing. Recently, there is an active development of fluorescent LED replacement lamps that can be plugged into existing fluorescent lamp sockets.

Since fluorescent lamps have negative voltage-current characteristics, currents are limited by inserting ballasts in series with lamps so as to have positive characteristics with respect to the power supply voltage. There are various types of such fluorescent ballasts as follows.

The starter type ballast uses a starter operated manually or automatically, and is related to the switch action of the starter, which greatly changes the ballast circuit.

Rapid starter ballast is an electrode heating winding attached to the ballast to preheat the electrode of the lamp and to start the lamp by applying sufficient voltage between the electrodes when the electrode reaches a temperature sufficient for electron emission. It is a ballast used in a circuit system in which electrodes are heated by windings.

Instantaneous start ballasts do not require a separate electrode preheating, but instead of applying a sufficiently high voltage between both electrodes of the lamp to start instantaneously, it is a ballast used in a circuit method in which the electrode is heated by the lamp current during lighting.

The semiconductor starter type ballast includes a starting semiconductor element in the ballast and preheats the electrode with its switching action or electrode heating winding, and starts the lamp by the semiconductor switch function, while the lamp is turned on by the lamp current and the electrode heating winding during lighting. It is a ballast used in the circuit method of heating.

Electronic ballasts are divided into preheating and non-preheating methods according to the lamp start-up method, and are divided into self-loading and taping methods according to the initial operation and control method of the oscillator.

It has a start-up and lighting circuit by a combination of all or a part of a semiconductor element, a transformer, a choke coil, a capacitor, etc., and converts a power of AC 220 [V] 60 [Hz] into a DC power by a rectifying circuit and then switches it again. (Inverter) is a ballast that turns on a lamp appropriately by converting it into an AC power source having a high frequency of 20 to 50 [kHz].

Since the existing fluorescent lamps are equipped with various kinds of ballasts, in order to be able to replace fluorescent lamps with LED lamps without leaving the luminaires, the LED lamps must be equipped with a circuit that operates in all of the ballasts listed above. .

1 is a circuit diagram of a starter ballast. Applied to preheated fluorescent lamps. When the lamp is turned on, the switch S is shorted and a preheating current of about 1.5 to 2 times the lamp current flows into the lamp filament F. When S is opened when it is sufficiently heated, a high transient voltage of several hundred V occurs in the instantaneous choke coil L, which causes Is added to start.

In many cases, a lighting tube (glow starter) is used instead of a switch. The lighting tube is a small neon or argon glow discharge tube having a movable electrode made of a U-shaped bimetal and a fixed electrode using lead wires. The discharge start voltage of the lighting tube is lower than the power supply voltage and higher than the tube voltage.

When the power supply voltage is applied to the lighting tube circuit, the glow discharge is started between the electrodes. After 1 to 2 seconds, the high-temperature expansion side of the bimetal expands and bends, and the anode contacts and the circuit is shorted. As a result, an electric current of about 1.5 to 2 times as usual flows through the electrode, and the electrode is rapidly heated to emit electrons. Since the anode of the glow switch is short-circuited, there is no heat, so it cools down to the low-temperature expansion side and falls to return to its original position automatically after 1 to 2 seconds, so the current of the circuit is cut off rapidly and discharged by the high voltage generated in the choke coil. Starts and lights up.

Since the tube voltage is applied to the tube while the fluorescent lamp is on, and the tube voltage is 70 V or less for the 20 W fluorescent lamp, no glow discharge occurs in the tube with a discharge start voltage of 85 V or above. Wait until the light turns on.

In order to replace a fluorescent lamp with an LED lamp in the place where such a starter ballast is installed, it is necessary to prevent high voltage generated from the choke coil and to prevent abnormal operation of the lighting tube.

The base of the fluorescent lamp replacement LED lamp has two pins per electrode, one pair is connected to the external power supply side and one pair is connected to the starter side. If the electrode of the LED PCB is not connected to the pin connected to the dual starter side, the LED PCB operates as if it is supplied with normal AC power, and the starter does not operate abnormally since no power is connected. In the case of using such a power connection method and an LED lamp by the same, even if you do not know which pair of the socket is an external power source, it is not very inconvenient to change the pair only once.

2 is a circuit diagram of a rapid start ballast. The rapid start lighting circuit is called a fast start circuit and a leakage transformer is used. The voltage of about 4V is always applied to the anode of the lamp by winding the electrode heating winding separately from the ballast. The power supply voltage is boosted and applied to the lamp at the same time as heating, so it starts in about 1 ~ 2 seconds. The electrode is made of a triple coil filament, and is sufficiently filled with an electron emitting substance.

In order to replace fluorescent lamps with LED lamps where such starter ballasts are installed, it is necessary to consider that there is a voltage difference of about 4V between pins on the same electrode.

There are two pins per electrode on the base of the fluorescent lamp replacement LED lamp. Both pairs are connected to the external power source, but the voltage difference is different. When the electrode of the LED PCB is not connected to the pin connected to one side of the LED PCB, the LED PCB operates as if it is supplied with normal AC power.

Fig. 3 is a circuit of the instant start ballast, which is an excellent ballast when used in series including a choke coil and a capacitor. In this case, if the choke coil and the capacitor values are selected so that the impedance is capacitive with respect to the frequency of the power supply, the lamp current and the lamp voltage advance to the power supply voltage. In this method, since the capacitor terminal voltages are superimposed, there is an advantage that the lamp can be stably lit even in a fluorescent lamp having a considerably higher lamp voltage than the choke coil ballast. It is also possible to obtain very stable characteristics against voltage fluctuations. However, this method has the feature of turning on the power at the same time as the power supply, but has a disadvantage of shortening the life of the lamp because a high starting voltage is required and the filament is easily consumed.

In order to replace fluorescent lamps with LED lamps where such instant start ballasts are installed, a power supply capable of accommodating a lighting voltage of 600V must be made. This is reflected in the rated voltage of the LED PCB.

The base of the LED replacement lamps has two pins per electrode, both of which are connected to the external power supply. When the electrode of the LED PCB is not connected to the pin connected to one side of the LED PCB, the LED PCB operates as if it is supplied with normal AC power.

4 is a circuit diagram of a semiconductor starter ballast. It is described similarly to the operation of the starter ballast described above, and the alternative LED lamp is similarly described.

Ballasts for fluorescent lamps are divided into magnetic, semiconductor, and electronic systems. High-end electronic ballasts with excellent electrical safety, easy system design, and long lamp life have emerged as ballasts suitable for consumer needs.

Magnetic ballasts use choke coils, leakage transformers, and large-capacity capacitors as described above. In addition to the power consumed by light in fluorescent lamps, a large amount of power loss of about 8 W or more occurs due to heat generated by the iron core and copper wire of the ballast itself. In addition, because it is turned on by commercial cables of 60Hz, flickering occurs. When flickering is low or the humidity is high, flickering is more severe and it may not turn on. To compensate for this drawback, the electronic ballast uses a semiconductor device to rectify the AC 60Hz power supply into DC, converts it into high frequency of 25-50kHz in the inverter circuit, and stably lights the fluorescent lamp through the output current limiting circuit. . Since the electronic ballast is turned on by a high frequency power source compared to the magnetic ballast, the luminous efficiency is improved by about 15%. Since the semiconductor device is used, the loss due to self-heating in the choke coil can be reduced by about 25%. Electronic ballasts not only save energy, but also protect the eyesight by providing high quality light that cannot be detected by eyes due to high frequency lighting. In addition, it is possible to eliminate the noise caused by the vibration of the electromagnetic force generated by the choke coil and iron core coil of the magnetic ballast. Electronic ballasts are lighter than magnetic ballasts and ballast self-heating is less than 10. Electronic ballasts can be turned on even at low voltages.

Non-preheating is described analogously to plugging an LED lamp into the instant start ballast described above, and preheating is described similarly to plugging an LED lamp into the above rapid start ballast. The difference is that it is a relatively low voltage high frequency power supply.

Therefore, the power connection method of the fluorescent lamp replacement LED lamp of the present invention is to connect only one pair of the power connector of two pairs (electrically paired) of the conventional fluorescent lamp.

In addition, the fluorescent lamp replacement LED lamp of the present invention is to connect only one pair of the power connector of two pairs (electrically paired) of the conventional fluorescent lamp.

Obviously, connecting the unconnected connector using a very large resistor can produce the same effect.

By connecting the base pin of the fluorescent lamp replacement LED light as in the present invention can be directly plugged into the various types of ballasts installed in the existing, it is possible to check the enormous social cost of the removal of the fluorescent light fixture and the installation of the LED light fixture. .

In addition, compared to the starter type, rapid start type, semiconductor ballast, and preheating electronic ballast, the preheating power is cut off at the source.

Compared with the starter type or the rapid start type, the operation of the starter is disabled, so the noise is less generated.

The LED lamp is an embodiment (Fig. 10) as an LED PCB (Fig. 6) equipped with two or more long rod-shaped heat sinks (Fig. 5) and LED elements attached to one side of the heat sink, the fluorescent lamp socket LED lamps It may be composed of a base (Fig. 7) attached to the end of the heat sink for mounting, a drive circuit PCB (Fig. 8) inserted into the drive circuit inserting portion 101 inside the heat sink and a diffusion plate (Fig. 9) added to the front surface of the LED PCB. have.

Since the cross-section of the fluorescent glass tube is a circle, designing the cross-section of the heat sink so that the shape is most similar to the circle will reduce the psychological resistance of consumers to replace the fluorescent lamp.

The LED lamp needs a surface to which the LED PCB to which the LED element is attached can be attached. Preferably, the LED lamp should be flat to be thermally stable.

Therefore, it is common that the cross section of the heat sink is a semicircle in which the circle is cut in the horizontal direction, but is not necessarily limited thereto. For example, it may be in the shape of a square, or may be in the shape of an arc having an angle larger than a semicircle, or may be in the shape of an arbitrary polygon.

Hereinafter, the cross section of the heat sink will be described with reference to a semicircle in which the circle is cut in the horizontal direction.

If you cut the semicircle vertically, you will have two quadrants. In this embodiment, the cross-sectional shape of the heat sink is such that. It is preferable to cut the quadrants so that there is a constant interval between the quadrants.

The right angles of the faces facing each other and the bottom of the LED PCB are preferable in terms of matching the gap between the heat sinks and the empty space inside the heat sinks.

LED PCB is preferably a flexible PCB that is easy to attach. This is because flexible PCB can make long rolls and can cut various lengths.

In order to attach the LED PCB to the desired surface of the heat sink, it is preferable to attach using a double-sided adhesive with good thermal conductivity. Of course, it is also possible to use bolts to strengthen the fixing. In this case, the tab should be formed on the heat sink.

In the case of using the direct lighting as shown in FIG. Of course, it is possible to indirectly use the inverted light attached to the lower surface and to attach both the lower surface and the inclined surface.

The base attached to the end of the heat sink (FIG. 7) for mounting the LED light into the fluorescent socket generally uses the G13 standard. In the case of a straight tube, two bases are used at both ends.

When the lamp type, such as the P type, is changed, the tube size and the base type change. Hereinafter, description will be made based on T8 and G13 fluorescent lamps, but the technical spirit of the present invention is not limited thereto.

The base is preferably to match the inner shape of the base to the heat sink outer shape so as to surround the heat sink. Of course, it is desirable that the space where the pin is located additionally creates an empty space for connecting to the wire.

The beam 105 is formed to secure the connection space between the pin and the wire so that the heat sink can be inserted and stopped at the beam position.

It is also possible to form additional beams in the void space between the upper and lower beams exposed to the outside for increasing the strength of the base or for waterproofing and dustproofing.

When the final assembly is completed can be glued to the heat sink by applying an adhesive to the beam 105 to secure the connection space between the pin and the wire.

When the driving circuit is to be manufactured integrally, the driving circuit PCB (FIG. 5) may be inserted into the driving circuit inserting portion 101 inside the heat sink.

Since the grooves are dug to prevent them from being fixed and shaken, it is desirable not to place components or wiring in the outermost part of the PCB design.

If the driving circuit PCB is the same as the length of the heat sink, it should be firmly fixed. However, if the driving circuit PCB is made shorter than the heat sink, it should not be moved in the longitudinal direction with adhesives.

Depending on the direction of the LED PCB location can be used as indirect lighting and direct lighting, in the case of using direct lighting, the diffusion plate (Fig. 6), prism, barrel or barrier wall, lens, reflector, etc. in front of the LED PCB additionally Can be added.

For example, the diffusion plate (FIG. 6) is inserted into the diffusion plate insertion portion 102 of the heat sink and fixed primarily, and fixed by the diffusion plate support portion 106 of the base. In order to fix more firmly, an adhesive etc. can be used.

When waterproofing is required, there is a method of filling the heat sink and the base, the heat sink and the diffusion plate, and the base and the diffusion plate with silicone rubber.

Power supply method of the fluorescent lamp replacement LED lamp of the present invention is to connect only one pair of the power connector of the power connector of two pairs (electrically paired. It is.

In addition, the fluorescent lamp replacement LED lamp of the present invention is to connect only one pair of 107 or 108 of the power connector of the two pairs (electrically paired. 107 in Fig. 7, the opposite pin 108, the opposite pin 108) of the conventional fluorescent lamp.

If a non-connected connector is connected using a very large resistor, current is distributed by a pair of connectors and a resistor connected without a resistor. It is preferable that the resistance is 8, i.e., disconnected as the resistance value decreases, causing more useless power loss due to abnormal operation of the ballast.

However, the technical idea of the present invention is applied even if a finite resistance value is applied within the allowable power loss.

1 is a circuit diagram of a starter ballast.

2 is a circuit diagram of a rapid start ballast.

3 is a circuit of an instant start ballast.

4 is a circuit diagram of a semiconductor starter ballast.

5 is a heat sink constituting the LED lamp.

6 is an LED PCB constituting the LED lamp.

7 is a base constituting the LED lamp.

8 is a driving PCB constituting the LED lamp.

9 is a diffusion plate constituting an LED lamp.

10 is an embodiment of an LED lamp.

Description of the main parts of the drawing

101: drive circuit insert

102: diffusion plate insert

105: beam to secure the connection space between pin and wire

106: diffuser plate support

107, 108: base pin

Claims (4)

Power connection method of fluorescent lamp replacement LED lighting that connects only one pair of electrical two pairs of electrical connectors of fluorescent lamps The method of claim 1, wherein the remaining pair of connectors is connected to a fluorescent lamp replacement LED lamp that is connected to a finite resistance value within a range allowed by power loss. LED lamp for replacing fluorescent lamp that allows only one pair of electrical cables to be connected The fluorescent lamp replacement LED lamp of claim 3, wherein the remaining pair of connectors are connected to a finite resistance value within a range allowed by power loss.

Images