KR102525520B1 - Blinking-free and flicker-free ac direct-coupled type lighting device including boost converter - Google Patents

Abstract

An AC direct-coupled lighting device including a blinking removing unit, a flicker removing unit, and a light emitting diode (LED) lighting unit, wherein the blinking removing unit rectifies input AC power and converts the rectified AC power into DC power of a specified size. and a power step-up unit that converts and boosts to , and outputs a constant voltage of a specified size, and the flicker removal unit receives a constant voltage of a specified size and supplies a constant current to the LED lighting unit based on the constant voltage of the specified size.

Description

BLINKING-FREE AND FLICKER-FREE AC DIRECT-COUPLED TYPE LIGHTING DEVICE INCLUDING BOOST CONVERTER}

The present disclosure relates to a blinking-free and flicker-free lighting device. More specifically, the present disclosure relates to a blinking-free and flicker-free lighting device including a power boosting unit.

Unlike existing methods, AC (alternating current) direct-connected lighting devices do not use expensive switched mode power supply (SMPS) converters, so they have a long lifespan and relatively simple parts, so they are inexpensive. Due to these advantages, the AC direct connection method has recently become common. However, since an AC direct-coupled lighting device (eg, a light emitting diode (LED)) does not have an SMPS that serves to eliminate a blinking phenomenon and a flicker phenomenon, the blinking phenomenon and the flicker phenomenon may be problematic.

The blinking phenomenon may refer to a phenomenon in which a lighting device flickers intermittently due to a momentary voltage drop phenomenon occurring when an electric device or a heating device installed in a household is turned on/off.

Flicker is caused by a phase difference between the input voltage and current in the process of converting AC power to DC (direct current) power, and by the ripple voltage generated in the process of matching the phases of the input voltage and current. It can be understood as a flickering phenomenon.

In lighting devices, since the blinking and flicker phenomena can cause mental disorders to users and are a major cause of request for after service (A/S), measures to eliminate them can be devised.

(Patent Document 001) KR 10-2022-0140361 (Patent Document 002) KR 10-1942028 (Patent Document 003) KR 10-2012-0012755

An object of the present disclosure is to provide a lighting device equipped with a blinking removal unit and a flicker removal unit.

The problems to be solved by the present disclosure are not limited to the problems mentioned above, and other problems not mentioned will be clearly understood by those skilled in the art from the description below.

An AC direct-coupled lighting device according to an aspect of the present disclosure for achieving the above-described technical problem includes a blinking removing unit, a flicker removing unit, and a light emitting diode (LED) lighting unit, and the blinking removing unit uses an input AC power and a power boosting unit that converts and boosts the rectified AC power into DC power of a specified size and outputs a constant voltage of a specified size, and the flicker removal unit receives the constant voltage of the specified size and receives the constant voltage of the specified size based on the constant voltage. Thus, a constant current can be supplied to the LED lighting unit.

In addition to this, a computer program stored in a computer readable recording medium for execution to implement the present disclosure may be further provided.

In addition to this, a computer readable recording medium recording a computer program for executing a method for implementing the present disclosure may be further provided.

According to the above-mentioned problem solving means of the present disclosure, AC power is converted and boosted to DC power to remove the blinking phenomenon, and a constant current based on a constant voltage is supplied to the LED lighting unit to provide an effect of removing the flicker phenomenon.

The effects of the present disclosure are not limited to the effects mentioned above, and other effects not mentioned will be clearly understood by those skilled in the art from the description below.

1 is a block diagram showing the structure of an AC direct-coupled lighting device of the present disclosure.
2A illustrates a current waveform of AC power output from a power supply unit.
2B illustrates a current waveform output from a power boosting unit.
2C illustrates a current waveform output from the flicker removal unit.
3 is a flowchart illustrating blinking removal and flicker removal operations of the AC direct-coupled lighting device according to the present disclosure.
4 illustrates a structure of an AC direct-coupled lighting device according to an embodiment of the present disclosure.
5A illustrates a circuit configuration of a rectifier according to an embodiment of the present disclosure.
5B illustrates a circuit configuration of a blinking removal unit according to an embodiment of the present disclosure.
5C illustrates a circuit configuration of a flicker removal unit according to an embodiment of the present disclosure.
6 illustrates a structure of an AC direct-coupled lighting device according to an embodiment of the present disclosure.
7 illustrates a structure of an AC direct-coupled lighting device according to an embodiment of the present disclosure.

Like reference numbers designate like elements throughout this disclosure. The present disclosure does not describe all elements of the embodiments, and general content or overlapping content between the embodiments in the technical field to which the present disclosure belongs is omitted. The term 'unit, module, member, or block' used in the specification may be implemented as software or hardware, and according to embodiments, a plurality of 'units, modules, members, or blocks' may be implemented as one component, It is also possible that one 'part, module, member, block' includes a plurality of components.

Throughout the specification, when a part is said to be "connected" to another part, this includes not only the case of being directly connected but also the case of being indirectly connected, and indirect connection includes being connected through a wireless communication network. do.

In addition, when a certain component is said to "include", this means that it may further include other components without excluding other components unless otherwise stated.

Throughout the specification, when a member is said to be located “on” another member, this includes not only a case where a member is in contact with another member, but also a case where another member exists between the two members.

Terms such as first and second are used to distinguish one component from another, and the components are not limited by the aforementioned terms.

Expressions in the singular number include plural expressions unless the context clearly dictates otherwise.

In each step, the identification code is used for convenience of description, and the identification code does not explain the order of each step, and each step may be performed in a different order from the specified order unless a specific order is clearly described in context. there is.

Hereinafter, the working principle and embodiments of the present disclosure will be described with reference to the accompanying drawings.

In this specification, the 'AC direct-coupled lighting device according to the present disclosure' includes all of various devices capable of providing results to users by performing calculation processing. For example, an AC direct-coupled lighting device according to the present disclosure may include a computer, a server device, and a portable terminal, or may be in any one form.

Here, the computer may include, for example, a laptop computer, a desktop computer, a laptop computer, a tablet PC, a slate PC, and the like equipped with a web browser.

The server device is a server that processes information by communicating with an external device, and may include an application server, a computing server, a database server, a file server, a game server, a mail server, a proxy server, and a web server.

The portable terminal is, for example, a wireless communication device that ensures portability and mobility, and includes a Personal Communication System (PCS), a Global System for Mobile communications (GSM), a Personal Digital Cellular (PDC), a Personal Handyphone System (PHS), and a PDA. (Personal Digital Assistant), IMT (International Mobile Telecommunication)-2000, CDMA (Code Division Multiple Access)-2000, W-CDMA (W-Code Division Multiple Access), WiBro (Wireless Broadband Internet) terminal, smart phone ) and wearable devices such as watches, rings, bracelets, anklets, necklaces, glasses, contact lenses, or head-mounted-devices (HMDs). can include

1 is a block diagram showing the structure of an AC direct-coupled lighting device of the present disclosure.

Referring to FIG. 1 , an AC direct-coupled lighting device 100 includes a power supply unit 10, a blinking removal unit 110, a flicker removal unit 120, and/or a light emitting diode (LED) lighting unit 130. can include The components shown in FIG. 1 are not essential to implement the AC direct-coupled lighting device 100 according to the present disclosure, so the AC direct-coupled lighting device 100 described in this specification is more than the components listed above. It may have many or few components.

In one embodiment, the power supply unit 10 may apply commercial AC power to the blinking removal unit 110 . Commercial AC power may refer to general AC power that periodically changes in size and direction with time and is provided to homes or businesses. In Korea, the distribution voltage of commercial AC power supplies 220 V, 60 Hz AC voltage as a standard voltage. However, the applied voltage is only exemplary, and embodiments of the present disclosure are not limited thereto.

Referring to FIG. 2A , FIG. 2A illustrates a current waveform 200 of AC power output from the power supply unit 10 . The current waveform 200 may change slightly in size at at least one point (eg, reference numeral 210). This is due to the blinking phenomenon and may be caused by the operation of a peripheral electronic device or a heat transfer device. For example, when a peripheral electronic device is turned on or off, the size of commercial AC power is slightly changed, so that the waveform of commercial AC power may appear like the current waveform 200 .

Referring back to FIG. 1 , the blinking removing unit 110 may include a rectifying unit 102 and a power boosting unit 104 . The blinking removal unit 110 may remove the blinking phenomenon by outputting DC power Vc having a constant size regardless of minute changes in the size of the received commercial AC power.

In one embodiment, the rectifier 102 may include a bridge diode. The rectifying unit 102 may rectify the input commercial AC power and apply the rectified power to the power boosting unit 104 .

In one embodiment, the power boosting unit 104 may include a boost converter. The power boosting unit 104 may convert the received rectified AC power into DC power and boost the converted DC power to a specified size. For example, the power boosting unit 104 may convert and boost the rectified AC power into DC power (Vc) of 400V. The power boosting unit 104 may output DC power Vc having a designated size. DC power source Vc may be a constant voltage.

Referring to FIG. 2B , FIG. 2B illustrates a current waveform 220 output from the blinking removal unit 110 . The blinking removal unit 110 may output a current waveform including an AC component, such as the current waveform 220 , by rectifying and boosting the AC power. The alternating current component of the current waveform 220 is generated by charging and discharging of the capacitor in the process of smoothing the rectified power supply, and may cause a flicker phenomenon.

Referring back to FIG. 1 , the flicker removal unit 120 may receive a constant voltage from the blinking removal unit 110 and output a constant current for driving the LED lighting unit 130 .

Referring to FIG. 2C , FIG. 2C illustrates a current waveform 230 output from the flicker removal unit 120 . The flicker removal unit 120 may output a constant current Ic having a constant magnitude by removing an AC component from the output of the blinking removal unit 110 .

Referring back to FIG. 1 , the flicker removal unit 120 may supply a constant current Ic having a designated size to the LED lighting unit 130 . In one embodiment, the LED lighting unit 130 may include an LED array composed of at least one light emitting diode. The LED array may be driven by the supplied constant current (Ic). The flicker removal unit 120 may remove a flicker phenomenon by supplying a constant amount of current to the LED array so that at least one light emitting diode included in the LED array is always lit.

At least one component may be added or deleted corresponding to the performance of the components shown in FIG. 1 . In addition, it will be easily understood by those skilled in the art that the mutual positions of the components may be changed corresponding to the performance or structure of the system.

Meanwhile, each component shown in FIG. 1 means software and/or hardware components such as a Field Programmable Gate Array (FPGA) and an Application Specific Integrated Circuit (ASIC).

3 is a flowchart illustrating blinking removal and flicker removal operations of the AC direct-coupled lighting device according to the present disclosure.

In operation 300, the blinking removal unit 110 may rectify the input AC power, convert the rectified AC power into DC power of a specified size, and boost the voltage. For example, the input AC power is a commercial AC power and may have an AC voltage of 220V and 60Hz. For example, a DC power supply of a specified size may have a constant voltage of 400V. The blinking removal unit 110 may output a positive voltage Vc having a designated level.

In operation 310, the flicker removal unit 120 may receive a constant voltage Vc of a designated level and supply constant current Ic to the LED lighting unit 130 based on the constant voltage Vc of a designated level.

In operation 320 , the LED lighting unit 130 may be driven by the constant current supplied by the flicker removal unit 120 .

4 illustrates a structure of an AC direct-coupled lighting device according to an embodiment of the present disclosure. Description of components having the same reference numerals as those of FIG. 2 among the components of FIG. 4 may refer to the description of FIG. 2 .

In one embodiment, the AC direct-coupled lighting device 400 may include a first circuit board 410, a second circuit board 420, and a dimming controller 430. The first circuit board 410, the second circuit board 420, and the dimming controller 430 may be electrically connected.

In one embodiment, the blinking removal unit 110 may be mounted on the first circuit board 410, and the flicker removal unit 120 and the LED lighting unit 130 are mounted together on the second circuit board 420 It can be. Therefore, when the blinking removal unit 110 or the flicker removal unit 120 is out of order, the AC direct-coupled lighting device 400 can be repaired by replacing only the circuit board on which each is mounted.

In one embodiment, the dimming control unit 430 may generate a signal for adjusting the amount of light of the LED lighting unit 130 and transmit the signal to the LED lighting unit 130 . The LED lighting unit 130 may be driven in at least one dimming mode based on the received signal.

5A illustrates a circuit configuration of a rectifier according to an embodiment of the present disclosure.

In one embodiment, the rectifier 102 may include a plurality of capacitors, a bridge circuit, a plurality of variable resistors, and a transformer. The configuration of the rectifying unit 102 is exemplary, and embodiments of the present disclosure are not limited thereto. For example, the rectifying unit 102 may further include other components not shown in FIG. 5A.

5B illustrates a circuit configuration of a power boosting unit according to an embodiment of the present disclosure.

In an embodiment, the power boost unit 104 may include a plurality of inductors, a plurality of capacitors, a transistor Q1, a first logic unit U5, a plurality of resistors, and a plurality of diodes D1, D2, and D4. there is. The configuration of the power boosting unit 104 is exemplary, and embodiments of the present disclosure are not limited thereto. For example, the power boosting unit 104 may further include other components not shown in FIG. 5B (eg, diodes and feedback circuits).

In one embodiment, the inductor L2, the transistor Q1, the diode D2, and the resistor R10 may be understood as components for voltage boosting. The inductor L2 may be connected to the drain of the transistor Q1, the diode D2, and the resistor R10 may be connected to the gate of the transistor Q1, respectively. For example, the inductance of L2 may be 2.6mH.

In one embodiment, the bead L3 can be understood as a component for removing noise of the transistor Q1, the diode D1 as a boosting diode, and the diode D4 as a component for preventing reverse electromotive force.

In one embodiment, the plurality of capacitors C6 and C7 may be understood as a circuit configuration for current smoothing. For example, capacitances of C6 and C7 may be 10uF.

In an embodiment, the seventh terminal of the first logic unit U5 may be a feedback terminal, and the eighth terminal may be an Over Voltage Protection (OVP) terminal.

In one embodiment, the plurality of resistors (R12, R13, R14) can be understood as a regulating configuration for limiting to a constant voltage.

5C illustrates a circuit configuration of a flicker removal unit according to an embodiment of the present disclosure.

In one embodiment, the flicker removal unit 120 may include a plurality of resistors and a second logic U2. The configuration of the rectifying unit 102 is exemplary, and embodiments of the present disclosure are not limited thereto. For example, the rectifier 102 may further include other components (eg, diodes and feedback circuits) not shown in FIG. 5B.

In one embodiment, the resistance values of the plurality of resistors R23, R24, R25, and R26 may be 3043216, 474/3216, 304/3216, and 154/2012 (Ω), respectively.

In an embodiment, the second logic unit U5 may receive the output of the blinking removal unit 110 as an input through the first terminal. The seventh terminal of the second logic U5 may be a feedback terminal, and the eighth terminal may be an over voltage protection (OVP) terminal. An eighth terminal of the second logic U5 may be connected to the LED lighting unit 130 to supply a constant current.

6 illustrates a structure of an AC direct-coupled lighting device according to an embodiment of the present disclosure. The AC direct-coupled lighting device 600 of FIG. 6 may be understood as having the dimming controller 430 removed from the AC direct-coupled lighting device 400 of FIG. 4 . Accordingly, the LED lighting unit 130 of FIG. 6 may be driven in one mode.

7 illustrates a structure of an AC direct-coupled lighting device according to an embodiment of the present disclosure. In the AC direct-coupled lighting device 700 of FIG. 7 , it can be understood that the blinking removal unit 110, the flicker removal unit 120, and the LED lighting unit 130 are implemented on one circuit board 710. .

Meanwhile, the disclosed embodiments may be implemented in the form of a recording medium storing instructions executable by a computer. Instructions may be stored in the form of program codes, and when executed by a processor, create program modules to perform operations of the disclosed embodiments. The recording medium may be implemented as a computer-readable recording medium.

Computer-readable recording media include all types of recording media in which instructions that can be decoded by a computer are stored. For example, there may be read only memory (ROM), random access memory (RAM), magnetic tape, magnetic disk, flash memory, optical data storage device, and the like.

As above, the disclosed embodiments have been described with reference to the accompanying drawings. Those skilled in the art to which the present disclosure pertains will understand that the present disclosure may be implemented in a form different from the disclosed embodiments without changing the technical spirit or essential features of the present disclosure. The disclosed embodiments are illustrative and should not be construed as limiting.

Claims (10)

An AC direct-coupled lighting device including a blinking removal unit, a flicker removal unit, and a light emitting diode (LED) lighting unit,
The blinking removal unit includes a rectifying unit for rectifying input AC power and a power boosting unit for converting and boosting the rectified AC power into DC power of a specified size and outputting a constant voltage of the specified size,
The flicker removal unit receives the constant voltage of the specified size and supplies a constant current to the LED lighting unit based on the constant voltage of the specified size;
The rectifier includes a bridge circuit, at least one variable resistor, a transformer, and at least one capacitor,
The power boosting unit includes an inductor, a transistor, a first diode, and a resistor,
The inductor is connected to the output terminal of the rectifier and the drain of the transistor,
the first diode and the resistor are connected in parallel to the gate of the transistor;
The transistor boosts the power rectified through the rectifier,
The power step-up unit includes a second diode and a bead,
The second diode and the bead are connected to the inductor to remove noise, AC direct-coupled lighting device. delete delete delete delete According to claim 1,
The power boosting unit includes a third diode and a capacitor,
The third diode and the capacitor are connected in parallel to the output terminal of the rectifier to prevent reverse electromotive force.
AC direct-coupled lighting equipment. According to claim 6,
The power boosting unit includes a smoothing circuit,
The capacitance of each of the plurality of capacitors included in the smoothing circuit is 10uF,
AC direct-coupled lighting equipment. According to claim 7,
The flicker removal unit and the LED lighting unit are implemented on one circuit board,
AC direct-coupled lighting equipment. According to claim 7,
The blinking removal unit, the flicker removal unit, and the LED lighting unit are implemented on one circuit board,
AC direct-coupled lighting equipment. According to claim 7,
Further comprising a dimming control unit electrically connected to the LED lighting unit,
AC direct-coupled lighting equipment.

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