KR100987278B1 - Large Scale Landscape Lighting System Using Power Line Communication - Google Patents

Abstract

The present invention relates to a large-scale landscape lighting system using power line communication, comprising: a main computer receiving information on an image to be used for landscape lighting through a console and converting the image into data capable of power line communication; A first PLC modem connected to an output terminal of the main computer to transmit the converted image data through a power line in which a power line and a data line are integrally formed; A second PLC modem connected to an input of a vision controller to receive image data transmitted from the power line; A vision controller which receives the image data received by the second PLC modem and applies a Hamming code to perform error detection and error correction; It includes a DMX512 protocol for controlling the image data stored in the vision controller to appear on the LED display. Therefore, the present invention can improve the vision processing performance of landscape lighting while greatly reducing the wiring complexity of power lines and data lines based on power line communication, and replaces the existing basic error detection method with an improved technology capable of error correction. It is possible to build a large-scale landscape lighting system with high reliability, which not only enhances the international city image but also secures the competitiveness of the city and improves the quality of the urban environment.

Power Line, Landscape Lighting, Vision Controller, DMX512 Protocol

Description

Large Scale Lightscape System Using Power Line Communication

The present invention relates to a large-scale landscape lighting system using power line communication, and more particularly, landscape lighting is installed on large buildings such as bridges or downtown buildings installed on rivers, and beautifully decorate the city at night with light, citizen traffic. A large-scale landscape lighting system using power line communication to improve the safety and security of the city.

In recent years, landscape lighting in the urban environment has played a very important role, and the city's landscape lighting decorates the city at night with light and beautifies it and makes it beautiful. As a zoom, it is a measure of urban culture.

Based on the proposition of 'commercialization of urban tourism', the city aims to change from temporarily passing tourism to staying cities, and revises related laws such as building law, which obliges the installation of nighttime lighting facilities to make Seoul a vibrant city at night. In case of Seoul, the Sejong Center, Hongin Gate, Han River Bridges, and large buildings in the center of the city have already installed the landscape lighting system, while in overseas, Paris, Japan, Nagoya, Italy, Rome, China World-renowned tourist cities such as Shanghai have also used landscape lighting for a long time.

However, as the demand for landscape lighting increases, the wiring complexity of power lines and data lines increases, causing problems such as the quality of large-scale landscape lighting vision and the efficient processing of large-scale lighting data. Due to the data line length problem and the complexity of the data line, errors in the transmission of lighting data are relatively high, and thus, reliable data is required to reduce the need for retransmission due to the error.

In addition, LED currently used in landscape lighting is composed of saturation, brightness, color, etc. The controller for the conventional vision is difficult to output the same color point repeatedly and uniformly, and the color of LED is degraded by temperature change. Real-time control functions, such as compensation, are essential, and traditional vision controllers are not capable of handling large amounts of high-speed data and are unable to meet the data bandwidth demands of many LED Pixels due to large display size changes.

As described above, the landscape lighting system has a relatively high probability of error because the data transmission distance is much longer than the general lighting system and the data size is large, and if the lighting vision is wrongly illuminated by the data error, it has great value for the overall aesthetics. It can be a big blemish on dull landscape lighting.

DMX, which has been developed and commercialized so far, uses a method of detecting errors by adding bits called parity, but this is the simplest method of error detection, but the odd number of bits has changed. Can only detect errors. That is, when the even number of data bits are different, an error cannot be detected and recognized as correct data. When an error is detected using a parity bit, there is a disadvantage in that retransmission is required for correct data transmission.

In order to solve the problems described above, the present invention provides a general-purpose controller system that can improve the vision processing performance of landscape lighting while significantly reducing the wiring complexity of power lines and data lines based on PLC, The objective of the present invention is to provide a large-scale landscape lighting system using power line communication with higher reliability by replacing the detection method with an improved technology capable of error correction.

A configuration for achieving the object, the main computer for receiving information about the image to be used for landscape lighting through the console, and converts the image into data capable of power line communication; A first PLC modem connected to an output terminal of the main computer to transmit the converted image data through a power line in which a power line and a data line are integrally formed; A second PLC modem connected to an input of a vision controller to receive image data transmitted from the power line; A vision controller which receives the image data received by the second PLC modem and applies a Hamming code to perform error detection and error correction; It includes a DMX512 protocol for controlling the image data stored in the vision controller to appear on the LED display.

In another aspect of the present invention, the vision controller includes a vision processing module for extracting image values by color decoding image data without error, and RGB (Red, Green, Blue) for storing image values extracted through the color decoding. Built in memory.

In another aspect of the present invention, the vision processing module includes a network port for performing network communication, a data processor for outputting LCD image signals and map information input through the network port to a converter, and an input from the data processor. A converter converts the LCD image signal into an LED signal through the LCD image signal and the map information, and an output port for outputting the LED signal converted by the converter.

As described above, the present invention can improve the vision processing performance of landscape lighting while greatly reducing the complexity of wiring of power lines and data lines based on power line communication, thereby improving the existing basic error detection method as an improved technology capable of error correction. As a result, a large-scale landscape lighting system with higher reliability can be built, which not only enhances the international city image but also secures the competitiveness of the city and improves the quality of the urban environment.

1 is an overall configuration diagram of a large-scale landscape lighting system using power line communication according to the present invention, FIG. 2 is a block diagram of a large-scale landscape lighting system using power line communication according to the present invention, and FIG. 3 is a vision process according to the present invention. 4 is a detailed configuration diagram of the module, FIG. 4 is a detailed view illustrating a process of outputting image data input to the vision controller according to the present invention to the LED display, FIG. 5 is a graph of brightness characteristics of the LCD and LED according to the present invention. 6 is an embodiment of address map information according to the present invention, and FIG. 7 is an embodiment of a DMX512 controller according to the present invention.

Hereinafter, the components will be described with reference to the drawings.

1 and 2 are the overall configuration and block diagram of a large-scale landscape lighting system using the power line communication of the present invention, the main computer 10, the first and second PLC modem (20, 30), vision controller 40, DMX512 Protocol 50 and LED display 60.

The main computer 10 receives the information on the image to be used for landscape lighting through the console and converts the input image into data capable of power line communication, the first PLC modem connected to the output terminal of the main computer 10 20 transmits the converted image data through the power line L. The power line L of the present invention integrates the existing separated power line and the data line to reduce the complexity of the wiring.

The second PLC modem 30 connected to the first PLC modem 20 and the power line L is connected to an input terminal of the vision controller 40 and transmitted from the first PLC modem 20 to be transmitted through the power line L. The first and second PLC modems 20 and 30, which are connected to the main computer 10 and the vision controller 40, respectively, receive image data, and are caused by using different modems using the same modem. This will reduce data errors.

The vision controller 40 receives the image data received by the second PLC modem 30 and applies a Hamming code to perform error detection and error correction. The vision controller 40 provides image data without error. It includes a vision processing module 41 for extracting the image value by color decoding, and an RGB (Red, Green, Blue) memory 42 for storing the image value extracted through the color decoding.

As illustrated in FIG. 3, the vision processing module 41 may include a network port 411 for performing network communication through an arbitrary communication protocol in the data processing unit 412, and an LCD image input through the network port 411. A data processor 412 for outputting the signal and map information to the converter 413; and an image corrector for converting the LCD image signal into an LED signal through the LCD image signal and map information input from the data processor 412. 413a, a map converter 413b, and a converter 413 including a signal processor 413c, and an output port 414 for outputting the LED signal converted by the converter 413.

The LED signal output to the output port 414 is stored in the RGB memory 42 and finally output to the LED display 60 through the DMX512 protocol 50, and the data processor 412 is connected to the network port 411. Ethernet communication is performed to receive and process various image data in real time, and is output as an LED signal for displaying an image on the LED display 60.

4 is a detailed view illustrating a process of outputting image data input to the vision controller 40 to an LED display. The input image data is stored in the RGB memory 42 through color decoding, and the RGB memory 42 ) Is composed of a red memory 421, a green memory 422 and a blue memory 423, the data stored in each of the memory (421, 422, 423) via the DMX512 protocol (50) LED display consisting of Full Color LED Blocks ( 60).

FIG. 5 is a graph showing brightness characteristics of the LCD output from the data processor 412 and brightness characteristics of the LED converted by the converter 413. FIG. 5 (a) shows brightness characteristics of the LCD. b) shows the brightness characteristics of the LED, and it can be seen that the actual brightness characteristics of each material according to the absolute brightness values are different, so that the difference between the LCD and the LED can be minimized so that they can have the same color when viewed with eyes. It is necessary to convert the image data values so that they look like natural colors.

The map converting unit 413b of the converting unit 413 converts the image data having the gamma-corrected LCD display map address into the map address form of the LED display 60 through the image correcting unit 413a. 6, five types of address map information from A to E are shown, wherein each address map information shows address map information corresponding to models of five different LED display devices.

The address map information may be divided into two parts, and may be divided into a part indicating a vertical axis of the screen (V_UADD [6.0]) and a part indicating a horizontal axis of the screen (V_LADD [8.0]). In the portion (V_UADD [6.0]) representing the vertical axis, numbers 0 through 6 represent the address of the vertical axis, and in the portion V_LADD [8.0] representing the horizontal axis, the numbers 0 through 8 represent the horizontal axis address, and from the left in the A map information, In turn, 7,2,1,0,12,11,10,9,8,6,5,4,3 represent the order of addresses read to generate the LED signal, that is, sequential from 0 to 12 By reading the data of the corresponding address to generate the LED signal corresponding to the data.

The signal processor 413c is converted into a display format of the LED display 60 by the map converter 413b and generates an LED signal for displaying an arbitrary image on the LED display 60 from the read image data. Unlike the LCD or PDP image display device, the LED display 60 can simply turn ON / OFF, so the LED display 60 must display at least 256 times (8 bits) during the time of displaying one screen on the PC. The screen can be displayed.

The DMX512 protocol 50 is a protocol for simply expressing data stored in the RGB memory 42 of the vision controller 40 to the LED. Referring to the embodiment of the DMX512 controller of FIG. 7, one data of the DMX512 In is described. Decode the signal of the line to generate 8-bit data of each of the R, G, B.

The DMX512 used in the DMX512 protocol 50 means a digital multiplex signal, which is an international communication standard, which is the most common international standard used with light source-related equipment, and provides up to 512 control channels per data link. The channels control the light brightness of the lamp

In addition, each slider terminal sends an 8-bit value with a value between 0 and 255 over the data link, with a value of 0 indicating that the light source is completely off, while a value of 255 indicates that the light source is fully on.

Referring to an embodiment of error detection and error correction by applying the Hamming code in the vision controller 40, a Hamming code is generated for each of R, G, and B values in the bit stream extracted from the image. If the R value extracted from the pixel is 8 bits of '11000100' as follows, 4 bits of parity bits are used to make 12 bits, and the additional bit positions are as follows.

In order to determine 0,1 value of additionally used bits, it is calculated as follows.

Recall that XOR is an odd function, that is, if '1' is odd, '1' and '1' are even 0, so each parity bit is determined by the number of '1' of its check position bits. As a result, when the parity bits include the parity bits in the bits checked, the number of '1's is always an even number.

When the data converted as described above is communicated through the PLC modems 20 and 30 and received by the vision controller 40, the 12-bit data is transferred from the 'error detection and error correction' block of the vision controller 40. Error detection and error correction are performed while recovering to bits, where errors cannot be 100% detected and corrected, but show an improved performance compared to the conventional method using only parity bits.

Accordingly, the present invention provides a general-purpose controller system capable of improving the vision processing performance of landscape lighting while greatly reducing the wiring complexity of power lines and data lines based on a PLC, and improving the existing basic error detection method with error correction. It replaces the technology to provide a large scale landscape lighting system using power line communication with higher reliability.

Although the present invention has been shown and described with respect to specific embodiments thereof, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined by the appended claims. Anyone who can afford it will know.

1 is an overall configuration of a large-scale landscape lighting system using power line communication in accordance with the present invention.

Figure 2 is a block diagram of a large-scale landscape lighting system using power line communication in accordance with the present invention.

Figure 3 is a detailed configuration of the vision processing module according to the present invention.

Figure 4 is a detailed view showing a process of outputting the image data input to the vision controller according to the present invention LED display.

5 is a graph of brightness characteristics of LCD and LED according to the present invention.

6 is an embodiment of address map information according to the present invention;

7 is an embodiment of a DMX512 controller according to the present invention.

<Description of the symbols for the main parts of the drawings>

10: main computer 20: 1 PLC modem

30: second PLC modem 40: vision controller

41: vision processing module 42: RGB memory

50: DMX512 protocol 60: LED display

Claims (3)

In large-scale landscape lighting system using power line communication, A main computer 10 which receives information about an image to be used for landscape lighting through a console and converts the image into data capable of power line communication; A first PLC modem 20 connected to an output terminal of the main computer 10 for transmitting the converted image data through a power line L in which a power line and a data line are integrally formed; A second PLC modem 30 connected to an input terminal of the vision controller 40 to receive image data transmitted from the power line L; A vision controller 40 which receives the image data received by the second PLC modem 30 and applies a Hamming code to perform error detection and error correction; Large-scale landscape lighting system using a power line communication, characterized in that it comprises a DMX512 protocol (50) for controlling the image data stored in the vision controller 40 to appear on the LED display (60). The method of claim 1, The vision controller 40 includes a vision processing module 41 for extracting image values by color decoding image data without error and an RGB (Red, Green, Blue) memory for storing image values extracted through the color decoding. Large-scale landscape lighting system using power line communication, characterized in that the built-in (42). 3. The method of claim 2, The vision processing module 41 may include a network port 411 for performing network communication, and a data processor 412 for outputting the LCD image signal and map information input through the network port 411 to the converter 413. And a conversion unit 413 for converting the LCD image signal into an LED signal through the LCD image signal and map information input from the data processing unit 412, and outputting the converted LED signal from the conversion unit 413. Large-scale landscape lighting system using power line communication, characterized in that consisting of an output port (414).

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