KR20140142134A - LED lamp driving device operating connected to the ballast for fluorcent lamp and the LED lamp comprising the driving device - Google Patents

Abstract

Lately, the importance of green industries for energy saving has been increasingly emphasized and distribution of LED lamps have become active as part of the energy saving. However, conventional fluorescent lamps made of a glass tube are not actively replaced with LED lamps because removing a ballast of the conventional fluorescent lamp and installing an LED converter is hard work. Since an LED lamp of the present invention uses AC power outputted from the ballast of the conventional fluorescent lamp to drive the LED lamp, it is possible to complete installation of the LED lamp by replacing the glass tube of the conventional fluorescent lamp with an LED lamp while using other luminaire components, including the ballast for fluorescent lamp, continuously. Moreover, the LED lamp of the present invention can maintain power consumption at a constant amount even if an input AC voltage increases to 250-260 V.

Description

An LED fluorescent lamp driving device connected to a fluorescent ballast and driven by LED fluorescent lamp. {LED lamp driving device operating connected to the ballast for a fluorescent lamp and the LED lamp comprising the driving device}

The present invention relates to an LED fluorescent lamp driving apparatus and an LED fluorescent lamp incorporating the driving apparatus, and more particularly, to an LED fluorescent lamp in which a conventional fluorescent lamp is detached from a conventional fluorescent lamp having a fluorescent lamp ballast and replaced with an efficient LED fluorescent lamp And a LED fluorescent lamp equipped with the driving apparatus.

In recent years, various lighting fixtures including fluorescent lamps have been replaced with LEDs having similar appearance, capable of sharing sockets, and having high efficiency for energy saving. However, since existing fluorescent lamp stabilizers are built in existing fluorescent lamp fixtures, it is inconvenient to replace fluorescent lamp stabilizers installed in existing fluorescent lamp fixtures with LED converters in order to use general LED fluorescent lamps. Diffusion is not activated. Therefore, there has been a demand for such an LED fluorescent lamp [aka, L light] that can be used by removing a conventional glass tube fluorescent lamp from an existing fluorescent lamp and attaching a fluorescent lamp-like LED fluorescent lamp thereon.

It is an object of the present invention to provide an LED fluorescent lamp driving apparatus and a LED fluorescent lamp equipped with the LED fluorescent lamp driving apparatus which can remove only a conventional glass tube fluorescent lamp in a conventional fluorescent lamp and insert the LED fluorescent lamp therein. When a conventional glass tube type fluorescent lamp is connected to a conventional fluorescent lamp ballast built in a conventional fluorescent lamp, a resonance type oscillator of about 45 KHz is driven in the fluorescent ballast, and an alternating current of about 45 KHz flows into the glass tube type fluorescent lamp, The electrons are struck by light. In the electronic ballast, the ballast and the glass tube type fluorescent lamp constitute the resonance circuit, and the efficiency is maximized by resonating at about 45 KHz though there is a slight difference in each fluorescent ballast. In addition, the electronic fluorescent ballast can not be used for LED fluorescent lamps without the special measures since the output voltage rises at the same rate when the AC input voltage rises. That is, when the electronic fluorescent ballast output is used for LED fluorescent lamp

1. The resonant frequency should not change significantly.

2. Ballast input power should not be degraded.

3. Even if the input AC voltage rises, the LED fluorescent lamp power consumption should not rise.

4. Luminous efficiency should be significantly improved.

5. Energy efficiency should be reduced by lowering the input power as the above-mentioned light efficiency is improved. If the above-mentioned five problems are solved, the LED fluorescent lamps can be easily replaced without the conventional ballast wiring work, and the spread of the LED fluorescent lamps will be activated.

The LED driving device receives the output of the fluorescent lamp ballast to drive the LED fluorescent lamp so that the efficiency and the power factor of the ballast are not reduced and the power consumption of the LED fluorescent lamp is not increased even if the ballast input AC voltage is significantly increased A LED fluorescent lamp driving apparatus capable of reducing the input power of a fluorescent lamp ballast by a light efficiency improvement of an LED fluorescent lamp and an LED fluorescent lamp equipped with such a driving fluorescent lamp are provided.

When using the LED fluorescent lamp driving apparatus of the present invention or the LED fluorescent lamp of the present invention, it is possible to reduce the energy by about 35% while using the existing electronic fluorescent lamp ballast and the luminaire as they are, . Considering the safety of the electronic fluorescent lamp, the power consumption is reduced without changing the frequency, so the amount of noise is reduced and the life of the ballast is prolonged.

; 접지단자BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a diagram showing the interconnection and operation relationship between an electronic fluorescent lamp ballast and a glass tube type fluorescent lamp; Fig.
2 is a block diagram and a circuit diagram showing an embodiment of the present invention;
3 is a circuit diagram and a block diagram showing still another embodiment of the present invention.
Description of the Related Art
A; Electronic fluorescent ballast
B; Glass tube type fluorescent lamp [Fig. 1]
B; LED fluorescent light. [Figure 2], [Figure 3]
a, b; Resonance output terminal of fluorescent ballast
c, d; Resonant feedback terminal of fluorescent ballast
a ', b'; Power input terminal of fluorescent lamp
c ', d'; Power Feedback Terminal of Fluorescent Lamp
B ₁ : LED fluorescent lamp driving device
B ₂ : LED matrix array
1. Bridge rectifier circuit block of LED fluorescent lamp [Fig. 2]
Redundancy bridge rectifier circuit block of LED fluorescent lamp [Figure 3]
1.1 First bridge rectifier circuit block [Fig. 2]
The first redundancy bridge rectifier circuit block [Figure 3]
1.2 Second bridge rectifier circuit block [Fig. 2]
Second Redundancy Bridge Rectification Circuit Block [Figure 3]
2. Current limit relay drive circuit block
2.1 Current Limiting Circuit Block
3. Smoothing capacitor delay drive circuit block
4. LED array driver circuit block
5. Energy charge / discharge circuit block
6. Overcurrent blocking circuit block
U1; High Frequency Oscillation and Current Control IC
U2; Comparator for Overcurrent Protection
D1 to D12; The first to twelfth diodes
D11, D21, D31, D41, D51, D61, D71, D81: Redundancy diode
C1-C10; The first to tenth capacitors
R1 to R11; The first to eleventh resistors
Rcs; Current detection resistor
L1, L2; The first and second coils
ZD1 to ZD2; The first and second zener diodes
RY1; 2 Circuit C Type Relay
Q1; NPN type transistor
FET1; Switching element
CN1; Input power connector
CN2; Connector for LED current supply
+; Bridge rectification + terminal

; Grounding terminal

The operation principle of the LED fluorescent lamp driving apparatus and the LED fluorescent lamp equipped with the driving apparatus of the present invention for achieving the above object will be described in detail with reference to the drawings. Fig. 1 is a view showing a connection relation between an electronic fluorescent lamp ballast and a glass tube type fluorescent lamp. Fig. A filament having a resistance value of about 1 ~ 2 Ω is connected between the terminals a and b of the fluorescent ballast and a 'and b' terminals of the fluorescent lamp ballast, and c ' , and a filament having the same resistance value as the filament connected between the terminals a 'and b' are formed in the inside of the fluorescent lamp. In the case of a glass tube type fluorescent lamp, electrons may be emitted when the filament is heated. In the case of the glass tube type fluorescent lamp,

And

Repeat the path. Therefore, a fluorescent glass tube can be regarded as a kind of condenser component. In the LED fluorescent lamp of the present invention, the filament is removed between terminals a 'and b' and a first bridge rectifier circuit block [1.1] is added as shown in FIG. 2. A second bridge rectifier Circuit block [1.2] is added, and the LED matrix array [B ₂ ] is made to emit light by the direct current power obtained here. The bridge rectifier circuit block [1] consists of eight diodes [D _{1 to} D ₈ ] and two capacitors [C1, C2]. However, if the AC input voltage supplied to the fluorescent ballast is higher than the rated value, the current flowing through the LED fluorescent lamp in the case of the LED fluorescent lamp increases exponentially, and eventually the LED matrix Because the array is destroyed, a current control circuit must be added. In the embodiment of FIG. 2, the LED fluorescent lamp driving device includes a bridge rectifier circuit block 1, a current limiting relay drive circuit block 2, a smoothing capacitor delay drive circuit block 3, an LED array drive circuit block 4, , An energy charge / discharge circuit block [5], and an overcurrent cutoff circuit block [6]. The LED array driving circuit block [4] is connected in series with the LED matrix array [B2] through the energy charge / discharge circuit block [5]. A current control circuit including a high-frequency oscillation circuit and a switching element is formed in the LED array drive circuit block [4], and is turned on at a speed of about 50 KHz so that a constant current flows through the LED matrix array [B ₂ ] OFF [OFF] Repeat the operation. The AC electric signal supplied from the fluorescent lamp ballast via the input power supply connector [CN1] consisting of four terminals is bridged in the bridge rectifier circuit block [1], smoothed in the smoothing capacitor delay drive circuit block [3] connectors are supplied to the anode terminal of the [B _2] LED matrix array through the [CN _2], the cathode terminal of the [B _2] wherein the LED matrix array is connected to one terminal of the first coil [L1] via the CN ₂ placing a quarter of the other terminal of the L1, a branch is a twelfth diode [D12] are connected to via the (+) output terminal of the bridge rectifier circuit block (1) and the other branch is a second coil [L ₂ - the via is connected to the fifth terminal of the high frequency oscillator and a current control IC [U _1], to the fourth terminal of the U ₁ current input to the fifth terminal of the U1, through the switching elements inside the IC [U1] And flows through the resistor [Rcs] for current detection to the ground terminal Flows. The voltage detected in the current detection resistor Rcs passes through the noise filter composed of the seventh capacitor C7, the seventh resistor R7 and the eighth capacitor C8, To the negative (-) terminal of the comparator [U2]. The switching device configured in the U1 repeats ON and OFF operations at a speed of about 50 KHz. When a voltage of more than a certain voltage is detected in the current detection resistor Rcs through the third terminal of the U1, And then turned on again after a predetermined time corresponding to the specific oscillation frequency, the current flowing through the LED matrix array is controlled to be constant.

(+) Terminal of the U2 when the voltage supplied from the fluorescent lamp ballast is out of the operating range of U1 or the LED current exceeds the predetermined value due to the occurrence of other abnormal phenomenon, The voltage of the seventh [output] terminal of the U2 becomes low. When the voltage of the seventh [output] terminal of the U2 is low, the signal is applied to the sixth terminal of the U2 via the tenth diode [D10] And turns off the overcurrent that may flow through the LED matrix array.

The terminal No. 16 of U2 is a driving power input terminal for driving U2.

The most significant feature of the present invention is that the two terminals [c 'terminal and d' terminal] among the four terminals [a ', b', c ', d'] of the input power supply connector [CN1] Terminal] and [b 'terminal]. The two terminals of one of the two caps constituted by one on each side of the LED fluorescent lamp are connected to the terminals a 'and b' of the CN 1 and the other terminal of the other cap is connected to the terminals c 'and d' . If the two caps are not electrically isolated (isolated), this is because one cap is plugged into the luminaire of the ceiling and the other cap is electrically charged when the human body touches the other cap.

The relay driving principle will be described with reference to Fig. The relay [RY1] used by the present invention is a C type relay in two circuits. 2 circuit When the C type relay is normally operated [when no current flows through the relay coil], the third terminal of the relay [RY1] is attached to the second terminal, and the terminal 8 of the relay is attached to the terminal No. 9. 2, the terminal c 'of CN1 is connected to the terminal No. 3 of the relay [RY], the terminal d' of CN1 is connected to the terminal No. 8 of the relay, and the terminal 2 of the relay Since terminal 9 is connected in the drawing,

c 'terminal → relay 3 terminal → relay 2 terminal → relay 9 terminal → relay terminal 8 → d' terminal

The terminal c 'and the terminal d' of CN1 are electrically connected to each other but they are not completely separated from the terminals a 'and b' of the CN1 and are not connected to any other parts It can be seen from FIG. Therefore, even if one cap is placed in the luminaire and the human body touches the other cap, the electric current does not flow. In this state, both of the caps are plugged into the lamp, so that the terminals a ', b', c ', and d' of the CN1 are connected to the fluorescent ballast. When current flows through the coil of the relay RY1, Since the [RY1] is of the C type for two times, the third terminal of the relay is connected to the fourth terminal and the eighth terminal of the relay is connected to the seventh terminal. As a result, the terminal c 'and the terminal d' The c 'terminal of the CN1 is connected to the anode terminal of the fifth diode [D5] of the bridge rectifying circuit block [1] through the third terminal and the fourth terminal of the relay, and the d' terminal Is connected to the anode terminal of the seventh diode [D7] of the bridge rectifying circuit block [1] through the eighth terminal and the seventh terminal of the relay [RY1]. In such a configuration, the fluorescent lamp ballast flows a start current at the initial start [Start], the relay drives the relay [RY1] by this start current, and the start current is electrically connected to the terminals c 'and d' This is because it can flow when it is connected. Also, when the smoothing capacitor C5 is connected to the bridge rectifier (+) output terminal because the start current is weak, the relay RY1 may not operate normally due to the charging current of the smoothing capacitor C5. Therefore, in the present invention, the smoothing capacitor delay drive circuit block 3 composed of the fourth resistor R4 and the fifth resistor R5, the sixth resistor R6, the switching element FET1, and the smoothing capacitor C5 is , The relay [RY1] is driven at the initial start, and the switching element [FET1] is turned on by using the relay driving current so that the charging current flows in the smoothing capacitor [C5]. The construction of the fourth resistor [R4] in series with the smoothing capacitor [C5] is a configuration for limiting the surge current that can flow in the smoothing capacitor. In FIG. 2, the third capacitor C3 formed between the collector terminal and the ground terminal of the first trandistor [Q1] is a structure for facilitating the relay driving. In the current limiting relay driving circuit block [2] of FIG. 2, the configuration of the current limiting circuit block [2.1] is such that, when the bridge rectifying voltage rises due to the LED load OPEN or the like, an overcurrent flows to the relay RY1 , And a configuration for limiting this. 3, which is another embodiment of the present invention, one series-connected diode is added to each diode of the eight diodes [D1 to D8] used in the bridge rectifying circuit block [1] of FIG. 2 to form a total of sixteen diodes Redundancy bridge rectifying circuit block in a ballast-compatible LED fluorescent lamp of the present invention. In the case of a general bridge rectifier circuit using eight diodes as in the embodiment of FIG. 2, when one of the eight diodes is short-circuited, the output terminal of the fluorescent ballast connected through the CN1 is short- In the case of ballast-compatible LED fluorescent lamps, it is desirable to construct a redundancy bridge rectifier circuit because the ballast may break or there is a risk of fire. In the case of electric appliances used for general commercial power supply, when the bridge rectifier diode is shorted, the fuse is opened but when the output terminal of the fluorescent lamp ballast is shorted, the fluorescent ballast can not supply enough energy to open the fuse Therefore, it is preferable to configure the redundancy bridge rectifying circuit block because the fuse constituted in the ballast-compatible LED fluorescent lamp is not opened. The two capacitors C1 and C2 formed in parallel with the two diodes D1 and D3 of the diodes used in the bridge rectification circuit block 1 according to the present invention are designed so that various types of fluorescent lamp ballasts can be stably operated . The configuration of the energy charging and discharging circuit block constituted by the first coil L1 and the second coil L2, the twelfth diode D12 and the tenth capacitor C10 is the same as that of the LED array driving circuit block 4 the switching device were to store energy in the L1 and L2 to flow in the LED current flowing through the [B _2] wherein the LED matrix array during oN via the L1 and L2, wherein the charged energy to the L1 when in the OFF diodes 12 and [D12] configuration by flowing to the LED matrix array [B _2] to improve the flicker through, the configuration of the L2 and C10 is configured by connecting the shunt is for noise suppression.

Claims (6)

In a fluorescent lamp-type ballast-compatible LED fluorescent lamp including an LED lamp driving device [B1] and an LED matrix array [B2] and including four terminals exposed to the outside in two terminals in one cap, The power supplied to the two terminals [a ', b'] of one cap is subjected to bridge rectification to the first bridge rectifying circuit block, and the second bridge rectifying circuit block [c ', d' 1.2] and the two-circuit C-type relay [RY], the c 'terminal and the d' terminal are normally connected to the contacts of the two-phase C-type relay at the time when the current does not flow in the C- Type relay coil, the c ' terminal and the d ' terminal are connected to each other when the current flows through the two-circuit C-type relay coil. And the second bridge rectifier circuit is connected to the first bridge rectifier circuit Configured to be connected to a
LED fluorescent light. [3] LED array drive circuit block [4], energy charge / discharge circuit block [5], overcurrent shut-off circuit block [5], current limit relay driver circuit block [2], smoothing capacitor delay driver circuit block [6] In a ballast-compatible LED fluorescent lamp driving apparatus which receives input power from four terminals [a ', b', c ', d'] by two terminals from one cap, The power supplied to the two terminals [a ', b'] of one cap is subjected to bridge rectification to the first bridge rectifying circuit block, and the second bridge rectifying circuit block [c ', d' 1.2] and the two-circuit C-type relay [RY1], the c 'terminal and the d' terminal are normally connected to the contacts of the two-phase C-type relay at the time when the current does not flow in the C- And is electrically isolated and completely isolated from the second bridge rectifier circuit block [1.2], and the two circuits C When a current flows through the relay coil in the mouth c 'terminals and d' as the terminal are separated from each other, through the contacts of the second type relay circuit C [RY1], the second configured to be connected to a bridge rectifier circuit block
LED fluorescent lamp driving device. 3. The method of claim 2,
One terminal of the two-circuit C-type relay [RY1] coil is connected to the bridge rectifying circuit block [1] through a resistor [R1] And the other terminal is connected to the collector terminal of the transistor Z1 and the emitter terminal of the transistor Z1 is connected to the positive terminal of the first zener diode ZD1 through the resistor R2. And the cathode terminal of the first zener diode ZD1 is connected to the anode terminal of the first Zener diode ZD1 by connecting the base terminal of the transistor Z1 and the cathode terminal of the first Zener diode ZD1, To the (+) output terminal of the bridge rectifying circuit block 1, the anode terminal of the first Zener diode is connected to the cathode terminal of the second Zener diode ZD2, and the second Zener diode ZD2 ], The anode terminal is connected to the ground terminal
LED fluorescent lamp driving device. 3. The method of claim 2,
D11, D21, D21, and D12 are connected to the diodes D1, D2, D3, D4, D5, D6, D7 and D8 of the first bridge rectifier circuit block [1.1] and the second bridge rectifier circuit block [1.2] Further comprising a first redundancy bridge rectification circuit block [1.1] and a second redundancy bridge rectification circuit block [1.2], which are formed by adding the first redundancy bridge rectification circuit block [D31, D41, D51, D61, D71, D81]
LED fluorescent lamp driving device. 3. The method of claim 2,
The smoothing capacitor C5, the fifth resistor R5 and the switching element FET1 so that the charging current flows in the smoothing capacitor C5 after the two-phase C type relay RY is driven. , And a sixth resistor [R6]. The smoothing capacitor-delay driving circuit block [3]
LED fluorescent lamp driving device. 3. The method of claim 2,
The voltage detected by the LED current detection resistor Rcs is connected to the (-) terminal 6 of the overcurrent shutoff comparator U2 through a noise filter circuit composed of C7, R7 and C8, The output terminal 7 of the comparator U2 outputs Low and then the output terminal 7 of the U2 is connected to the output terminal of the LED array driving circuit block 4 through the tenth diode D10. And is connected to one terminal of the high frequency oscillation and LED current control IC [U1]. When the LED current exceeds a predetermined value, the LED over current is cut off by turning off the switching device incorporated in the U1
LED fluorescent lamp driving device.

Images