KR101799329B1 - The smart communication of visible light communication with ac direct led driving module - Google Patents

Abstract

The purpose of the present invention is to provide a visible light communication apparatus for an AC direct driving driver, wherein when AC input power is directly applied to an LED lamp to make the LED lamp emit light, visible light LED ID data as well as LED light are generated and emitted to nearby smart devices and vehicles. In addition, through a zero-crossing point method or a digital chip pulse line coding method, an effective section where visible light data can be obtained can be set; changes in a detected current based on a rectified voltage of AC 220 V are detected based on a detected voltage so that the light emission of an LED lamp can be controlled based on the current rectified voltage state; and by using improved power factor and current regulation properties, a high-quality AC direct driving LED lamp can be secured. The apparatus of the present invention comprises: a lamp main body (10); a power supply unit (20); a rectifying circuit unit (30); a zero-crossing point circuit unit (40); an LED lamp (50); and a smart LED visible light data control module (60). According to the present invention, components are simplified and thereby a circuit having a simple structure can be realized, thereby having economical effects. In addition, since the volume of the apparatus is small, a planar design is possible and the service life is long.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an AC direct drive LED driver driving module,

The present invention relates to a visible light communication device for an AC direct drive driver that applies an AC input power directly to an LED lamp and emits visible LED ID data together with LED light when the LED lamp emits light, .

Visible light communication (VLC) is a type of wireless optical communication system that transmits directly through a free space without using optical fiber between a light source and a photodetector. It uses a single light source that generates visible light and combines illumination and communication It is widely used as a structure.

In the visible light communication, the transmission / reception system is simple in configuration, and there is no interference with the existing RF radio frequency, and the application field thereof is gradually widening.

A visible light emitting diode is widely used as a light source for visible light communication, and has recently made many improvements in its manufacturing technology.

Light emitting diodes (LEDs) are small and light in size, strong against mechanical shocks, and have a long life span. They are now widely used as indoor lighting, street lighting, portable and automotive lighting instead of conventional incandescent lamps and fluorescent lamps.

However, conventional AC direct-drive LED lighting has a serious flicker problem.

Due to this flicker phenomenon, conventional AC direct drive LED lighting was unable to transmit visible light. This is because the visible light LED ID data is destroyed due to the "0" current in which the LED current can not flow continuously when the LED light is read and the visible light LED ID data is loaded.

In addition, in the case of a conventional AC direct drive LED lamp, even if a separate DC / DC converter and PWM circuit are additionally provided for visible light communication, the illuminance is unstable, the distance between the visible light transmission and reception becomes short, There was this disconnected problem.

Korean Patent Registration No. 10-1293584

In order to solve the above problems,

AC input power can be directly applied to the LED lamp to emit visible light LED ID data along with LED light when the LED lamp emits light to be emitted to the surrounding smart devices and vehicles and can be used as a zero crossing point method or a digital ultrasound pulse line coding method It is possible to set an effective section in which visible light data can be obtained and to control the light emission of the LED lamp according to the current rectified voltage state by detecting the detection current change according to the rectified voltage as the detection voltage, The present invention provides a visible light communication device for an AC direct drive driver capable of securing a high-quality AC direct drive LED lamp with a constant power factor and current regulation characteristics.

In order to achieve the above object, a visible light communication device for an AC direct drive driver according to the present invention comprises:

The AC input power is directly applied to the LED lamp, and when the LED lamp emits light, the visible light LED ID data is generated along with the LED light to be emitted to the surrounding smart device and vehicle.

More specifically, the visible light communication device for the AC direct drive

A lamp body 10 for protecting and supporting each device from an external pressure,

A power supply unit 20 for receiving AC 220V power through a power line unit connected to one side of the lamp body and supplying power to each device,

A rectifying circuit unit 30 for rectifying the AC 220 V input from the power supply unit and outputting a rectified voltage,

A zero crossing point circuit part 40 which is located between the rectifying circuit part and the LED lamp and which sets an effective section for obtaining visible light data through a zero crossing point while insulating both ends,

An LED lamp 50 driven according to the switching signal of the zero crossing point circuit unit to emit LED light,

Detecting the change of the detection current according to the rectified voltage as the detection voltage and controlling the emission of the LED lamp according to the current rectified voltage state while generating the visible light LED ID data at the zero crossing point circuit side, And a smart LED visible light data control module 60 that controls the generation and emission of ID data.

As described above, in the present invention,

First, by applying the AC input power directly to the LED lamp, it can generate visible LED ID data along with the LED light when emitting the LED lamp, so that it can be radiated to the surrounding smart devices and vehicles. The compatibility and application range that can carry out the communication can be improved by 80% compared with the existing one.

Second, it is possible to set an effective interval for obtaining visible light data through the zero crossing point method or the digital ultrasound pulse line coding method. Thus, the visible light transmission / reception distance is 2 to 4 times longer than the conventional one, Various multi-information (location advertisement, communication service, vehicle control) can be transmitted to a smart device and a vehicle located close to each other.

Third, AC 220V can detect the change of the detection current according to the rectified voltage as the detection voltage, and control the light emission of the LED lamp according to the current rectified voltage state. Thus, the parts are simplified and the circuit can be implemented with a simple structure. As a result, it is economical, has a small volume, has a flat design, and has a long life span.

Fourth, improved power factor and current regulation characteristics ensure high quality AC direct drive LED lamps.

1 is a configuration diagram showing components of a visible light communication device 1 for an AC direct drive driver according to the present invention,
FIG. 2 is a perspective view illustrating components of a visible light communication device for a zero-crossing point type AC direct drive driver according to the present invention,
FIG. 3 is a block diagram illustrating components of a visible light communication device for a zero-crossing point type AC direct drive driver according to the present invention.
4 is a block diagram of a first smart LED visual light data control module 160 according to the present invention. The first smart LED display data control module 160 includes a first power supply unit 120, a first rectifier circuit unit 130, a zero crossing point circuit unit 140, a first LED lamp 150, A circuit diagram showing that these circuits are organically connected,
5 is a circuit diagram showing components of a zero crossing point circuit portion according to the present invention,
6 is a block diagram showing the components of the first visible light data setting control unit according to the present invention,
7 is a diagram illustrating an operation of the visible light communication device 100 for a zero crossing point type AC direct drive driver according to an embodiment of the present invention.
8 shows a wavelet transform graph for using a zero crossing point of a signal s (x) at a position x and a scale s through Wsf (x) of the wavelet transform equation 40a according to the present invention, In an embodiment that shows a graph generated and coded with a section average constant signal Zsf (x) 40b made of zero crossing points through a zero crossing point circuit part according to the invention,
FIG. 9 is a perspective view showing the constituent elements of a visible light communication device for an AC direct drive driver of a digital ultrasound pulse line coding type ac- cording to the present invention,
10 is a block diagram showing components of a visible light communication device for an AC direct drive driver according to the present invention,
11 is a block diagram of a second smart LED display data control module 260 according to an exemplary embodiment of the present invention. Referring to FIG. 11, a second power supply unit 220, a second rectifier circuit unit 230, a line coding control unit 240, a second LED lamp 250, A circuit diagram showing an organically connected structure,
12 is a circuit diagram showing components of a line coding control unit according to the present invention,
13 shows an embodiment in which a variation is generated in the digital impulse pulses " 1 " and " 0 " through the Manchester code unit according to the present invention.
14 is a block diagram showing components of a second visible light data setting control unit according to the present invention,
Fig. 15 is a diagram showing an example of a valid section (a) in which visible impression data can be obtained by line coding a digital impulse pulse on a pulse carrier through a Manchester code section 263a, an M-4B5B code section 263b and a 4B6B code section 263c according to the present invention In one embodiment,
FIG. 16 is a diagram illustrating an operation process of the visible light communication device 200 for the AC direct drive driver according to the present invention.

First, the LED lamp described in the present invention includes LED street lamps and LED lighting lamps.

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing components of a visible light communication device 1 for an AC direct drive driver according to the present invention, in which an AC input power is directly applied to an LED lamp, Together with the visible light LED ID data to emit to the surrounding smart devices and vehicles.

More specifically, the visible light communication device 1 for an AC direct drive driver mainly includes a visible light communication device 100 for a zero crossing point type AC direct drive driver, a visible light communication device 100 for a digital ultrasound pulse line type AC direct drive driver, Device 200 as shown in FIG.

[Zero Crossing  Point-type AC Direct drive  Visible light communication device 100 for driver]

The visible light communication device 100 for the zero crossing point type AC direct drive driver applies the AC input power directly to the LED lamp to set a valid section through which the visible light data can be obtained through the zero crossing point (SC-PSK), subcarrier phase-shift keying (SC-BPSK), Variable-PPM modulation, Chirp SS Spread Spectrum) modulation, and DS-SS (Direct Sequence-Spread Spectrum) modulation to set the visible light LED ID data communication signal.

2 and 3, the first lamp unit 110, the first power supply unit 120, the first rectifier circuit unit 130, the zero crossing point circuit unit 140, the first LED lamp 150 ), And a first smart LED visible light data control module 160.

First, the first lamp body 110 according to the present invention will be described.

The first lamp body 110 protects and supports each device from external pressure.

It is composed of a columnar column and a head lamp.

Here, as shown in FIG. 2, a power line portion is formed on the bottom surface of the support bar, and an AC 220 V commercial power is directly applied to the head lamp through the support bar via the power line portion.

A first power supply part is formed in the head lamp, a first rectifying circuit part is formed on one side of the first power supply part, a zero crossing point circuit part is formed between the first rectifying circuit part and the first LED lamp, And a first LED lamp is connected to the output side.

Next, the first power supply unit 120 according to the present invention will be described.

The first power supply unit 120 receives AC 220 V power through the power line unit connected to one side of the first lamp body, and supplies power to each device.

Next, the first rectifier circuit unit 130 according to the present invention will be described.

The first rectifier circuit part 130 rectifies the AC 220V input from the first power supply part and outputs a rectified voltage.

It consists of a bridge diode.

Next, the zero crossing point circuit unit 140 according to the present invention will be described.

The zero crossing point circuit unit 140 is positioned between the first rectifying circuit unit and the first LED lamp and sets a valid section through which the visible light data can be obtained through the zero crossing point while insulating both ends.

5, a first capacitor 141, a first comparison circuit 142, a first transistor unit 143, and a photocoupler 144 are formed.

The first capacitor 41 serves to smoothen the AC commercial power rectified through the first rectifier circuit.

The first comparison circuit 142 compares the smoothed AC commercial power supply voltage with the reference voltage through the first capacitor.

This is done by selecting either a diode of D1, D3, D4 or D2, or an op amp.

5, when the smoothed AC commercial power supply through the diodes D1, D3, D4, and D2 corresponds to a reference reference voltage (for example, 250 V), the switching of the first transistor unit is turned on, If the smoothed AC commercial power supply through the diodes D3, D4 and D2 does not correspond to the reference reference voltage (for example, 250 V), the switching of the first transistor unit is turned off.

The first transistor unit 143 turns on the AC commercial power source if the AC commercial power source corresponds to the reference voltage through the first comparison circuit unit, and turns off the AC commercial power source if the AC commercial power source does not correspond to the reference voltage.

When the sensing signal corresponding to the reference reference voltage is inputted through the sensing resistor R3 connected to the output side of the first comparison circuit, the sensing signal is turned on, and when the sensing signal does not correspond to the reference reference voltage, the sensing resistor R3 is turned off .

The first photocoupler part 144 is connected to the output side of the first transistor part to insulate both ends of the first rectifier circuit part and the first LED lamp, And a signal of "1 " to the first LED lamp.

Hereinafter, a description will be made of a method for obtaining visible light data through the zero crossing point circuit unit 140 including the first capacitor 141, the first comparison circuit unit 142, the first transistor unit 143 and the photocoupler unit 144 The process of setting the interval will be described in detail.

Here, zero crossing points are portions where the signal brightness component, which is the greatest characteristic of the signal, has a change, and usually indicates the maximum and minimum points of the signal.

First, the wavelet transform can express a local feature in a space and a frequency domain of a signal. In the present invention, the wavelet transform is used to extract characteristics of an AC 220V commercial power source.

That is, the wavelet transform at the scale s and position x of the AC 220V commercial power supply signal f (x) by the wavelet function is expressed by the following equation (1).

Actually, in the program used in the comparative experiment, a mother wavelet of the following formula (2), which is a double differentiated form of the gaussian smoothing function θ (x), is used.

At this time, the wavelet transform equation 40a for using the zero crossing point of the signal s (x) at the scale s and the position x is expressed by the following equation (3).

At this time, the signal obtained through Equation (3) is generated and coded as a piecewise mean constant signal Z _s f (x) consisting of zero crossing points.

Here, the section average constant function serves to set the visible light LED ID data based on the average value of the extracted zero crossing points after the wavelet transform.

The graph of the top of the oscilloscope of FIG. 8 shows how to use the zero crossing point of the signal s (x) at position x and the scale s through W _s f (x) which is the wavelet transform equation 40a according to the present invention To a wavelet transform graph,

The lower graph of the oscilloscope of FIG. 8 relates to a graph generated and coded with an interval average constant signal Z _s f (x) (40b) made of zero crossing points through a zero crossing point circuit part according to the present invention.

As described above, the zero crossing point circuit portion is generated as the section average constant signal Z _s f (x) 40b made of the zero crossing point, so that the signal "0" portion is set as the zero crossing point, Is set as an effective section in which visible light data can be obtained, and the visible light LED ID data is set.

Here, the reason why the signal " 0 " part is set as the zero crossing point is that the noise is minimized.

Likewise, another neighboring signal " 0 " part is set as a zero crossing point, and the set zero crossing point is set as an effective section for obtaining visible light data, thereby setting visible light LED ID data.

Through this process, even if a flicker phenomenon occurs in the AC direct drive LED lighting, it is generated as an interval average constant signal Z _s f (x) made of a zero crossing point through a zero crossing point circuit section, It is possible to improve the compatibility and the application range which can perform visible light communication anytime and anywhere on AC direct drive LED lamp by 80% compared with the conventional one.

Next, the first LED lamp 150 according to the present invention will be described.

The first LED lamp 150 is driven according to the switching signal of the zero crossing point circuit unit to emit LED light.

It consists of a plurality of LED chips and an LED driver PCB for driving the LED chips.

Next, the first smart LED visible light data control module 160 according to the present invention will be described.

The first smart LED visible light data control module 160 detects the change of the detection current according to the rectified voltage as the detection voltage and controls the emission of the LED lamp according to the current rectified voltage state while controlling the visible light LED ID data to the zero crossing point circuit part And generates and emits visible LED ID data together with the LED light when the first LED lamp emits light.

As shown in FIG. 4, the first reference voltage generating circuit unit 161, the first current detecting resistor Rg 162, and the first visible light data setting control unit 163.

The first reference voltage generating circuit part 161 serves to generate a reference voltage to be applied to the first comparing circuit part of the zero crossing point circuit part.

This is customized according to the number of LED lamp channels.

In the present invention, a plurality of resistors R1, R2, R3, and R4 connected in series to which a constant voltage Vref is applied are formed.

The resistor R1 is connected to the ground and the constant voltage Vref is applied to the resistor R4, and the resistor R4 acts as a load resistor for adjusting the output.

The resistors R1, R2, and R3 are for outputting reference voltages VREF1, VREF2, and VREF3 at different levels.

Among the reference voltages VREF1, VREF2 and VREF3, the reference voltage VREF1 has the lowest voltage level and the reference voltage VREF3 has the highest voltage level.

That is, each of the resistors R1, R2, and R3 outputs three reference voltages VREF1, VREF2, and VREF3 having increasing levels corresponding to the rising values of the rectified voltages applied to the three LED lamps LED1, LED2, and LED3 .

More specifically, the three reference voltages VREF1, VREF2, and VREF3 are set to have levels corresponding to the turn-on voltages of the respective output terminals of the three LED chips LED1, LED2, and LED3 connected by the three switching circuits 363, respectively Lt; / RTI >

Here, the turn-on voltage for each of the three LED chips (LED1, LED2, LED3) can be defined as a voltage required for turning on each channel.

The voltage required for turning on the LED chip LED1 is the turn-on voltage of the LED chip LED1 and the turn-on voltage of the LED chip LED1 can be defined as a level capable of turning on the LEDs included in the LED chip LED1 have.

The voltage required for turning on the LED chips LED1 and LED2 is the turn-on voltage of the LED chip LED2 and the turn-on voltage of the LED chip LED2 is the turn-on voltage of the LED chip LED2, Level. ≪ / RTI >

The voltage required for turning on the three LED chips LED1.LED2 and LED3 is the turn-on voltage of the LED chip LED3 and the turn-on voltage of the LED chip LED3 is applied to the three LED chips LED1, LED2, And can be defined as a level at which the light emitting diodes included therein can be turned on.

Here, the rectified voltage may be divided into three sections with variable widths based on the turn-on voltage. The reference voltage may be set to have a level corresponding to the turn-on voltage of each section, and the rectified voltage may be set to either rise or fall The LED chips corresponding to the corresponding section can be turned on by the operation of the corresponding switching circuit.

The first current detection resistor Rg 162 serves to detect a resistance value that can satisfy the turn-on condition of the first transistor unit of the zero crossing point circuit unit.

This is customized according to the number of channels of the first transistor unit.

The first visible light data setting control unit 163 controls the zero crossing point circuit unit so that the first visible light data setting control unit 163 controls the zero crossing point circuit unit so that the visible light data can be loaded through the zero crossing point and the position information and the multi information (LBS advertisement, weather information, traffic information, Driving sensing data, and autonomous driving information), which are included in the visible light LED ID data communication signal.

6, an on-off keying (OOK) modulator 163a, a subcarrier frequency shift keying (SC-FSK) 163b, and a subcarrier phase shift keying (SC- A Variable-PPM modulator 163e, a Chirp SS (Spread Spectrum) modulator 163f, a Direct Sequence-Shift Keying (DS-SS) modulator 163c, a subcarrier phase shift keying Spread Spectrum) modulation section 163g is selected and configured.

The on-off keying (OOK) modulator 163a multiplies a unipolar spreading code signal by a predetermined switching circuit by a carrier having a specific frequency band to perform on-off keying (OOK) modulation.

Here, the unipolar spreading code has a Zero Corelation Duration (ZCD) characteristic in which the cross-correlation characteristic between codes is one point orthogonal to the point where the cross-correlation characteristic is "0" or continuously cross-correlation characteristic is "0" Quot; 0 "characteristic of the cross-correlation characteristic continuously over a predetermined time interval.

The Subcarrier Frequency Shift Keying (SC-FSK) unit 163b serves to transmit the visible light LED ID data communication signal by changing the frequency of the sub-carrier.

The subcarrier phase shift keying (SC-PSK) unit 163c modulates the phase of the subcarrier to transmit the visible light LED ID data communication signal.

The subcarrier binary phase-shift keying (SC-BPSK) unit 163d performs phase modulation of the visible light LED ID data communication signal with a subcarrier and intensity-modulates the optical carrier.

This modulates the optical power corresponding to the phase modulation method after the optical power conversion to the receiving side.

The Variable-PPM modulator 163e serves as a modulation in which the 2-PPM modulation and the PWM modulation are configured in a hybrid manner.

The 2-PPM modulation serves to express bits "0" and "1" according to the position of the pulse.

The PWM modulation controls the brightness of the light source by changing the width of the pulse.

The Chirp SS (Spread Spectrum) modulator 163f performs modulation of spread spectrum communication using fixed coding without consideration of multiple access.

This is a simple structure, but has good performance in a channel environment where noise or attenuation is severe.

The Direct Sequence-Spread Spectrum (DS-SS) modulator 163g multiplies the spread code directly to the visible light LED ID data communication signal to obtain a spread signal and performs modulation.

This has a good effect on noise and jamming.

The visible light receiving module is divided into a smart device and a vehicle.

That is, the visible light receiving module for the smart device receives the visible light ID data communication signal transmitted through the visible light communication device for the AC direct drive driver through the image sensor, demodulates the zero crossing point, and restores the visible light LED ID data communication signal Visible light LED ID on the screen of smart device Display position information and multi information included in data communication signal.

It plays a role of synchronizing based on the point of zero crossing point.

In addition, the visible light receiving module for smart devices to which Chirp SS (Spread Spectrum) modulation and DS-SS (Direct Sequence-Spread Spectrum) modulation is applied takes sliding correlation and restores data using correlation peak point time Or synchronization can be ensured.

[Digital Impulse Pulse Line coding type  AC Direct drive  Visible light communication device 200 for driver]

The visible light communication device 200 for an AC direct drive driver for the digital ultrasound pulse line coding type AC direct power source directly applies an AC input power to an LED lamp to line-encode a digital ultrasound pulse on a pulse carrier to emit visible light data And sets one of the Manchester code, M-4B5B code, and 4B6B code to set the visible light LED ID data communication signal.

10, the second lamp unit 210, the second power supply unit 220, the second rectifier circuit unit 230, the line coding control unit 240, the second LED lamp 250, And a smart LED visible light data control module 260.

First, the second lamp body 210 according to the present invention will be described.

The second lamp body 210 protects and supports each device from external pressure.

It consists of a luminaire and a headlamp.

Here, as shown in FIG. 9, a power line portion is formed on one side of the lamp, and an AC 220 V commercial power source is directly applied to the head lamp through the lamp through the power line portion.

A second power supply part is formed on the head lamp, a second rectifying circuit part is formed on one side of the second power supply part, a line coding control part is formed between the second rectifying circuit part and the second LED lamp, And a second LED lamp is connected.

Next, the second power supply unit 220 according to the present invention will be described.

The second power supply unit 220 receives AC 220V power through a power line unit connected to one side of the second lamp body and supplies power to each device.

Next, the second rectifier circuit unit 230 according to the present invention will be described.

The second rectifying circuit unit 230 rectifies the AC 220V input from the second power supply unit and outputs a rectified voltage.

It consists of a bridge diode.

Next, the line coding control unit 240 according to the present invention will be described.

The line coding control unit 240 detects the peak point of the AC commercial power signal output from the output terminal of the second rectifier circuit unit and converts it into a pulsating carrier, And sets a valid section in which visible light data can be obtained.

As shown in FIG. 12, this circuit includes a diode 241, an RC low-pass filter 242, a second comparison circuit 243, and a second transistor 244.

The diode 241 serves to form an AC commercial power signal output from the output terminal of the second rectifier circuit portion into a pulsating carrier using the forward conduction characteristic of the diode.

The RC low-pass filter 242 is composed of a capacitor C and a load resistor R. The RC low-pass filter 242 filters a high-frequency (rf) signal component of a carrier wave out of a pulsating carrier formed from a diode, Detects the carrier, and transmits the carrier to the second comparison circuit portion.

The second comparison circuit part 243 compares whether the AC commercial power filtered through the RC low-pass filter corresponds to the reference voltage.

12, when the AC commercial power filtered through the low-pass filter corresponds to a reference reference voltage (for example, 250 V), the switching of the second transistor unit is turned on, and the AC commercial power filtered through the low- If the power source does not correspond to the reference reference voltage (for example, 250 V), the switching of the second transistor unit is turned off.

The second transistor unit 244 turns on when the AC commercial power source corresponds to the reference reference voltage through the second comparison circuit unit and transmits a signal of "1" to the second LED lamp, and the AC commercial power source supplies the reference voltage And turns off the light to transmit a signal of "0 " to the second LED lamp.

When the sensing signal corresponding to the reference reference voltage is inputted through the sensing resistor R5 connected to the output side of the second comparing circuit part as a result of the comparison of the second comparing circuit part, .

Next, the second LED lamp 250 according to the present invention will be described.

The second LED lamp 250 is driven according to a switching signal of the line coding control unit to emit LED light.

It consists of a plurality of LED chips and an LED driver PCB for driving the LED chips.

Next, the second smart LED visible light data control module 260 according to the present invention will be described.

The second smart LED visible light data control module 260 detects the detection current change according to the rectified voltage as a detection voltage and controls the light emission of the second LED lamp according to the current rectified voltage state, And generates visible LED ID data together with LED light when the LED lamp emits light.

11, the second reference voltage generating circuit portion 261, the second current detecting resistor Rg 262, and the second visible light data setting control portion 263 are constituted.

The second reference voltage generating circuit 261 generates a reference voltage to be applied to the second comparing circuit of the line coding controller.

This is customized according to the number of LED lamp channels.

In the present invention, a plurality of resistors R1, R2, R3, and R4 connected in series to which a constant voltage Vref is applied are formed.

The resistor R1 is connected to the ground and the constant voltage Vref is applied to the resistor R4, and the resistor R4 acts as a load resistor for adjusting the output.

The resistors R1, R2, and R3 are for outputting reference voltages VREF1, VREF2, and VREF3 at different levels.

Among the reference voltages VREF1, VREF2 and VREF3, the reference voltage VREF1 has the lowest voltage level and the reference voltage VREF3 has the highest voltage level.

That is, each of the resistors R1, R2, and R3 outputs three reference voltages VREF1, VREF2, and VREF3 having increasing levels corresponding to the rising values of the rectified voltages applied to the three LED lamps LED1, LED2, and LED3 .

More specifically, the three reference voltages VREF1, VREF2, and VREF3 are set to have levels corresponding to the turn-on voltages of the respective output terminals of the three LED chips LED1, LED2, and LED3 connected by the three switching circuits 363, respectively Lt; / RTI >

Here, the turn-on voltage for each of the three LED chips (LED1, LED2, LED3) can be defined as a voltage required for turning on each channel.

The voltage required for turning on the LED chip LED1 is the turn-on voltage of the LED chip LED1 and the turn-on voltage of the LED chip LED1 can be defined as a level capable of turning on the LEDs included in the LED chip LED1 have.

The voltage required for turning on the LED chips LED1 and LED2 is the turn-on voltage of the LED chip LED2 and the turn-on voltage of the LED chip LED2 is the turn-on voltage of the LED chip LED2, Level. ≪ / RTI >

The voltage required for turning on the three LED chips LED1.LED2 and LED3 is the turn-on voltage of the LED chip LED3 and the turn-on voltage of the LED chip LED3 is applied to the three LED chips LED1, LED2, And can be defined as a level at which the light emitting diodes included therein can be turned on.

Here, the rectified voltage may be divided into three sections with variable widths based on the turn-on voltage. The reference voltage may be set to have a level corresponding to the turn-on voltage of each section, and the rectified voltage may be set to either rise or fall The LED chips corresponding to the corresponding section can be turned on by the operation of the corresponding switching circuit.

The second current detection resistor (Rg) 262 serves to detect a resistance value that can satisfy the turn-on condition of the second transistor unit of the line coding control unit.

This is customized according to the number of channels of the second transistor unit.

The second visible light data setting control unit 263 controls the line coding control unit to line-code the digital ultrasound pulses on the pulsating carrier to generate position information and multi-information (LBS advertisement, weather information, Traffic information, sensing data for autonomous driving, and autonomous driving information).

As shown in Fig. 14, any one of the Manchester code portion 263a, the M-4B5B code portion 263b, and the 4B6B code portion 263c is selected and configured.

The Manchester code unit 263a serves to set a visible light LED ID data communication signal in a valid section in which visible light data can be obtained by line coding the digital ultrasound pulses " 1 " and " 0 ".

This is a DC balancing code. As shown in FIG. 13, since the mutation always occurs in the digital additive pulses " 1 " and " 0 ", there is a strong clock spectrum component, Have.

The M-4B5B code unit 263b converts 16 symbols, which can be represented by 4 bits, into 5 bits according to the reference conversion table setting value and sets the visible LED ID data communication signal to the 5-bit converted digital impulse pulse do.

This means that the average brightness is 60% (3: 2) or 40% (2: 3) because the ratio of bits "1" to "0" is always 2: 3 or 3: 2 in 16 symbols converted to 5 bits.

The reference conversion table setting values of the M-4B5B code unit are set as shown in Table 1 below.

4B 5B 0 0000 00101 One 0001 10011 2 0010 00110 3 0011 10101 4 0100 01001 5 0101 10110 6 0110 01010 7 0111 11001 8 1000 01100 9 1001 11010 A 1010 10001 B 1011 01011 C 1100 10010 D 1101 01101 E 1110 10100 F 1111 01110

The 4B6B code unit 263c converts 16 symbols, which can be represented by 4 bits, into 6 bits according to the reference conversion table setting value, and sets the visible LED ID data communication signal to the 6-bit converted digital impulse pulse.

Since the ratio of bit "1" to bit "0" is equal to 3: 3 in all 16 symbols converted to 6 bits, the average brightness of all 16 symbols is 50%.

The reference conversion table setting values of the 4B6B code section are set as shown in Table 2 below.

4B 6B 0 0000 001110 One 0001 001101 2 0010 010011 3 0011 010110 4 0100 010101 5 0101 100011 6 0110 100110 7 0111 100101 8 1000 011001 9 1001 011010 A 1010 011100 B 1011 110001 C 1100 110010 D 1101 101001 E 1110 101010 F 1111 101100

Hereinafter, a specific operation process of the visible light communication device for an AC direct drive driver according to the present invention will be described.

[Zero Crossing  Point-type AC Direct drive  Operation Process of Visible Light Communication Device 100 for Driver]

First, as shown in FIG. 7, the first power supply unit receives AC 220V power through the power line unit, and supplies power to each device.

Next, the first rectifier circuit section rectifies the AC 220V input from the first power supply section to output the rectified voltage.

Next, the first reference voltage generating circuit part of the first smart LED visible light data control module generates a reference reference voltage to be applied to the first comparing circuit part of the zero crossing point circuit part.

Next, a zero crossing point circuit section is positioned between the first rectifying circuit section and the first LED lamp, and sets a valid section through which the visible light data can be obtained through the zero crossing point while inserting both ends.

Next, the first LED lamp is driven in accordance with the switching signal of the zero crossing point circuit portion to emit the LED light.

Finally, the first smart LED visible light data control module detects the detection current change according to the rectified voltage as the detection voltage, controls the light emission of the first LED lamp according to the current rectified voltage state, When the LED lamp emits light, it generates visible LED ID data together with LED light and emits it.

[Digital Impulse Pulse Line coding type  AC Direct drive  Operation Process of Visible Light Communication Device 200 for Driver]

First, as shown in FIG. 16, the second power supply unit receives the AC 220 V power supply through the power line unit, and supplies power to each device.

Next, the second rectifier circuit portion rectifies the AC 220V inputted from the second power supply portion to output the rectified voltage.

Next, the line coding control section is located between the second rectifying circuit section and the second LED lamp, detects a peak point of the AC commercial power supply signal output from the output terminal of the second rectifying circuit section, converts it into a pulsating carrier, And sets a valid section in which visible light data can be obtained.

Fig. 15 is a diagram showing an example of a valid section (a section) for obtaining visible light data by line-coding a digital superposition pulse on a pulse carrier through a Manchester code section 263a, an M-4B5B code section 263b and a 4B6B code section 263c according to the present invention As shown in FIG.

Next, the second LED lamp is driven in accordance with the switching signal of the line coding control unit to emit the LED light.

Finally, the second smart LED visible light data control module detects the detection current change according to the rectified voltage as the detection voltage, controls the light emission of the second LED lamp according to the current rectified voltage state, When the LED lamp emits light, it generates visible LED ID data along with the LED light and emits it.

1: Visible light communication device for AC direct drive
100: Visible light communication device for zero-crossing point type AC straight running driver
110: first lamp body 120: first power supply unit
130: first rectifier circuit part 140: zero crossing point circuit part
150: first LED lamp 160: first smart LED visible light data control module
200: Visible light communication device for digital directivity driver
210: second lamp body 220: second power supply unit
230: second rectifier circuit part 240: line coding control part
250: second LED lamp 260: second smart LED visible light data control module

Claims (10)

And a visible light communication device for an AC direct drive driver for generating an LED ID light and emitting visible LED ID data to the surrounding smart device and vehicle when the AC input power is directly applied to the LED lamp,
The visible light communication device for the AC direct drive
A first lamp body 110 for protecting and supporting each device from external pressure,
A first power supply unit 120 receiving AC 220 V power through a power line unit connected to one side of the first lamp body and supplying power to each device,
A first rectifying circuit part 130 for rectifying the AC 220 V input from the first power supply part and outputting a rectified voltage,
A zero crossing point circuit unit 140 positioned between the first rectifying circuit unit and the first LED lamp for isolating both ends thereof and setting an effective section through which visible light data can be obtained through a zero crossing point,
A first LED lamp 150 driven according to a switching signal of the zero crossing point circuit unit to emit LED light,
Detects the change of the detection current according to the rectified voltage as the detection voltage, controls the emission of the first LED lamp according to the current rectified voltage state, generates the visible LED ID data on the side of the zero crossing point circuit portion, And a first smart LED visible light data control module (160) for generating and emitting visible light LED ID data, the visible light communication field for an AC direct drive,
The zero crossing point circuit section 140
A first capacitor 141 for smoothing the AC commercial power rectified through the first rectifier circuit portion,
A first comparator circuit 142 for comparing whether the smoothed AC commercial power supply through the first capacitor corresponds to the reference voltage,
A first transistor unit 143 for turning on the AC commercial power source through the first comparison circuit unit when the AC commercial power source corresponds to the reference reference voltage and turning off the AC commercial power source if the AC commercial power source does not correspond to the reference reference voltage,
0 "and "1" through the light in accordance with the switching signal of the first transistor section while isolating both ends of the first rectifying circuit section and the first LED lamp, And a photocoupler unit (144) for transmitting the visible light to the LED lamp.
delete delete delete The method of claim 1, wherein the first smart LED visible light data control module (160)
A first reference voltage generation circuit portion 161 for generating a reference voltage to be applied to the first comparison circuit portion of the zero crossing point circuit portion,
A first current detection resistor (Rg) 162 for detecting a resistance value that can satisfy the turn-on condition of the first transistor unit of the zero crossing point circuit unit,
(LBS advertisement, weather information, traffic information, autonomous driving sensing data, autonomous driving information) is included in a valid section in which visible light data can be loaded through the zero crossing point circuit section by controlling the zero crossing point circuit section And a first visible light data setting control unit (163) for setting the inherent visible light LED ID data communication signal.
6. The apparatus according to claim 5, wherein the first visible light data setting controller (163)
An On-Off Keying (OOK) modulator 163a for performing on-off keying (OOK) modulation by multiplying a unipolar spreading code signal through a predetermined switching circuit by a carrier having a specific frequency band,
A Subcarrier Frequency Shift Keying (SC-FSK) unit 163b for transmitting a visible light LED ID data communication signal by changing the frequency of a subcarrier,
A subcarrier phase shift keying (SC-PSK) section 163c for transmitting the visible light LED ID data communication signal by modulating the phase of the subcarrier,
A subcarrier phase-shift keying (SC-BPSK) unit 163d for modulating the phase of the visible light LED ID data communication signal with a subcarrier and then modulating the intensity of the optical carrier,
A Variable-PPM modulation section 163e for forming and modulating 2-PPM modulation and PWM modulation in a hybrid manner,
A Chirp SS (Spread Spectrum) modulator 163f for performing modulation of spread spectrum communication using fixed coding without consideration of multiple access,
(Direct Sequence-Spread Spectrum) modulation section 163g for multiplying the spread code by the visible light LED ID data communication signal to obtain a spread signal and then performing modulation. Visible light communication device for a driver.
The apparatus according to claim 1, wherein the visible light communication device for AC direct drive
A second lamp body 210 for protecting and supporting each device from external pressure,
A second power supply unit 220 receiving AC 220V power through a power line unit connected to one side of the second lamp body and supplying power to each device,
A second rectifying circuit part 230 for rectifying the AC 220 V input from the second power supply part and outputting a rectified voltage,
A peak point of the AC commercial power supply signal output from the output terminal of the second rectifying circuit section is detected and converted into a pulsed carrier which is positioned between the second rectifying circuit section and the second LED lamp, A line coding control unit 240 for setting an effective period for obtaining visible light data,
A second LED lamp 250 driven according to a switching signal of the line coding control unit to emit LED light,
Detecting the change of the detection current according to the rectified voltage as the detection voltage and controlling the emission of the second LED lamp according to the current rectified voltage state while generating the visible light LED ID data on the line coding control part side, And a second smart LED visible light data control module (260) for controlling to generate and emit LED ID data.
The apparatus of claim 7, wherein the line coding controller (240)
A diode 241 for forming an AC commercial power source signal output from the output terminal of the second rectifier circuit portion into a pulsating carrier using the forward conduction characteristic of the diode,
And a capacitor C and a load resistor R so as to filter the high frequency (rf) signal component of the carrier from the pulsating carrier formed from the diode to detect a low frequency pulsating carrier corresponding to the envelope of the modulated carrier wave, An RC low-pass filter 242 for transferring the low-
A second comparison circuit 243 for comparing whether the AC commercial power filtered through the RC low-pass filter corresponds to the reference voltage,
1 "to the second LED lamp. When the AC commercial power does not correspond to the reference voltage, the signal is turned" 0 " And a second transistor unit (244) for transmitting a signal including the first LED signal to the second LED lamp.
8. The system of claim 7, wherein the second smart LED visible light data control module (260)
A second reference voltage generation circuit portion 261 for generating a reference reference voltage to be applied to the second comparison circuit portion of the line coding control portion,
A second current detection resistor (Rg) 262 for detecting a resistance value that can satisfy the turn-on condition of the second transistor unit of the line coding control unit,
(LBS advertisement, weather information, traffic information, autonomous driving sensing data, autonomous driving navigation data, and the like) in a valid section in which visible light data can be obtained by line coding the digital adaptive pulse on the pulsating carrier And a second visible light data setting control unit (263) for setting a unique visible light LED ID data communication signal including the information of the visible light LED ID data communication signal.
The display device according to claim 9, wherein the second visible light data setting controller (263)
A Manchester code section 263a for setting a visible light LED ID data communication signal in an effective section in which visible light data can be obtained by line coding the digital ultrasound pulses " 1 " and " 0 &
An M-4B5B code section 263b for converting 16 symbols, which can be represented by 4 bits, into 5 bits according to the reference conversion table setting value and setting the visible LED ID data communication signal to the 5-bit converted digital impulse pulse,
One of the 4B6B code units 263c for converting 16 symbols that can be represented by 4 bits into 6 bits according to the reference conversion table setting value and setting the visible LED ID data communication signal to the 6-bit converted digital impulse pulse is selected And a second light source for emitting the visible light.

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