KR20110061069A - Led lighting instruments to support dmx512 communication protocol - Google Patents

Abstract

PURPOSE: An LED lighting instrument which supports a dmx512 communication protocol is provided to simplify the entire illumination control system, thereby facilitating installation and construction. CONSTITUTION: A receiving unit(20) receives data from a DMX512 mater device. A controller(30) extracts data corresponding to the channel of the controller from DMX512 data and controls an LED lighting instrument by the extracted data. An output unit(40) outputs data after the data corresponding to the channel of the controller as DMX512.

Description

LED lighting instruments to support DMX512 communication protocol

The present invention relates to an LED luminaire, and more particularly, to each LED luminaire, the DMX512 data transmitted from the master device in the order in which the plural LED luminaires are connected in series and in close proximity with the DMX512 master device. LED luminaire that supports DMX512 communication protocol that extracts data corresponding to its own channel, controls on / off the built-in LED by using the extracted data, and transmits data after extracted data as DMX512 data. It is about.

In order to prevent the harmful effects of air pollution due to industrialization, the importance of eco-friendliness is gradually increasing in indoor and outdoor lighting. In other words, the old lights were lights that affect a lot of environmental pollution, such as fluorescent lamps, mercury lamps, neon lights, etc., but recently, environmentally friendly lighting using LEDs has been developed and is gradually being used for indoor and outdoor lighting.

In addition, in the past, the control technology of lighting was dominated by the on / off concept of simply turning the lights on and off, but in recent years, it is sufficient to control them through simple on / off control by applying LED lighting to advertisement and landscape lighting. It becomes difficult to expect efficiency.

Therefore, recently, one of the international communication protocols, DMX512 (ANSI E11), has been applied as a lighting control method.

However, a master device that generates DMX512 data for lighting control and a receiver for receiving DMX512 data transmitted from the MASTER device and controlling a lighting device are provided, and a connection method between the receiver device and the master device is provided. This parallel configuration has the disadvantage of incurring additional costs in installation and construction.

In addition, when configured as described above for the lighting control, the channel sequence number should be set for each receiver, and additional costs are generated by installing a separate receiver between the master and the LED lighting equipment.

In this case, in order to set the channel number, each receiver must be configured by attaching a part such as a separate dip switch for setting the channel number. If there are a plurality of receivers connected to the master device (DMX512) In the system, up to 512 receivers can be connected), and the configuration of the entire lighting control system becomes very complicated, which causes considerable difficulties in installation and construction.

In other words, there is a demand for the development of an efficient lighting fixture that can simplify the configuration of the lighting control system using the DMX512 protocol.

An object of the present invention is to provide an LED luminaire supporting a DMX512 communication protocol applicable to lighting control in a DMX512 (ANSI E11.11) protocol environment.

Another object of the present invention, DMX512 (ANSI E11.11) communication protocol DMX512 data generated by the master device, without having to set the channel number of each LED lighting fixture connected to the master (Master) device separately The present invention provides an LED lighting device that supports DMX512 communication protocol that does not include a channel setting device by performing lighting control by extracting only data corresponding to its own channel.

An object of the present invention described above, in a plurality of LED lighting fixtures on a lighting system to which the DMX512 communication protocol is applied, a receiver for receiving data DATA generated by a DMX512 master (MASTER) device, the input input through the receiver Extracts data corresponding to its own channel from the DMX512 data, and controls the LED luminaire according to the extracted data, and the data after the data corresponding to the own channel from the DMX512 data inputted through the receiver. It is achieved by providing an LED luminaire that supports the DMX512 communication protocol, which includes an output that outputs DMX512 data.

Another object of the present invention is to provide an LED luminaire that supports the DMX512 communication protocol for outputting the remaining DMX512 data in series, except for the channel information signal corresponding to its channel, to a neighboring receiver connected in series. Is achieved.

Another object of the present invention is characterized in that the output unit outputs the remaining DMX512 data except for the channel information signal corresponding to the own channel after a delay of 1 byte after receiving the DMX512 data generated from the DMX512 master device. Is achieved by providing an LED luminaire that supports the DMX512 communication protocol.

Another object of the present invention, the output unit DMX512 communication protocol for outputting the remaining DMX512 data except for the channel information signal corresponding to the channel after the delay of 1 byte after receiving the DMX512 data generated from the DMX512 master device By providing an LED luminaire to support it.

Another object of the present invention is achieved by providing an LED luminaire that supports the DMX512 communication protocol that automatically recognizes the channel sequence in the order of serial connection to the DMX512 master device.

Another object of the present invention, the channel information signal corresponding to its own channel extracted by the control unit supports the DMX512 communication protocol, which is the channel information signal first appearing after the first channel separation section in the DMX512 data received from the receiving unit By providing an LED luminaire.

By using the LED luminaire supporting the DMX512 communication protocol of the present invention, by simply configuring the entire lighting control system can be easy to install and construction and contribute to cost reduction.

In addition, it can contribute to the miniaturization or integration of the lighting apparatus.

The embodiments of the present invention described below are merely to describe in detail enough that one of ordinary skill in the art can easily practice the invention, which is why the scope of the present invention is limited. It does not mean that.

Hereinafter, with reference to the accompanying drawings, a preferred embodiment of the present invention will be described in detail.

1 is a view showing the connection relationship between the master unit and the receiver of the LED lighting fixture in the DMX512 environment, FIG. 4 is a diagram illustrating a timing chart of data to be transmitted, and FIG. 4 is a diagram illustrating a DMX data reception and transmission flowchart.

First, the DMX512 will be described to help understand the LED luminaire supporting the DMX512 communication protocol according to the present invention.

International communication standard DMX512 stands for digital multiplex signal. This is the most common international standard used with equipment related to light sources.

The DMX512 provides up to 512 control channels per data link. Originally, these channels controlled the light brightness of the lamps. This can be thought of as a 512 slider on the console, connected to 512 light sources. Each slider terminal sends an 8-bit value with a value between 0 and 255 over the data link.

A value of 0 indicates that the light source is completely off, while a value of 255 indicates that the light source is completely on.

In addition, DMX512 data transfers 250,000 bits per second using a standard RS-485 transmitter over two wires.

The DMX connector has five pins. It consists of one ground wire, two wires for "primary" communication from the DMX source to the DMX receiver, and two wires for "secondary" communication from the DMX receiver to the DMX source.

The DMX512 is connected using a method where the source is connected to the input of the first device and the output of the first device is connected to the input of the next device. The DMX standard allows up to 32 devices on a single DMX link.

Although each device has input and output connectors, they are simply connected together, and each device cannot perform any transmission or amplification.

Typically, each receiving device has a rotary switch that sets the "starting channel number" to respond to, for example, if two 6-channel dimming packs are used, the first dimming pack is assigned to DMX channels 1 through 6. Set the start to channel 1 to react, and the next dimmer pack to set the start to channel 7 to react to channels 7 to 12.

The DMX512 communication protocol is very simple and robust. The protocol includes a reset status (pointing to the start of a new packet), a start code, and data transfer for 512 bytes. Data packets are sent continuously. As soon as the transmission of one packet is complete (usually 1ms is allowed), another packet can be started without delay. If there is no change (no change in lamp level), the same data will be transmitted continuously. This is the most important feature of the DMX512. If there is a problem and the data is interrupted at the beginning, it will be resent immediately. Not all 512 channels require output per packet. It is not uncommon to find virtually all 512 channels used.

For example, a simple light source console only outputs 16 channels or less. The fewer channels are used, the higher the refresh rate. If only 24 channels are transmitted, you can have approximately 1000 DMX512 plays per second. If all 512 channels are transmitted, the refresh rate is about 44 times per second. To summarize the above,

The DMX512 connects one control source to multiple receivers. Serial data can be sent up to 4000 feet via a cable such as a microphone. In addition, up to 512 devices or functions on the device can be controlled with 8-bit resolution, and all channels can be continuously and safely played back.

Hereinafter, looks at in detail with respect to the embodiment according to the present invention.

The present invention is a plurality of luminaires using LEDs on a lighting system to which the DMX512 communication protocol is applied, the receiving unit 20 for receiving data DATA generated by the DMX512 master (MASTER) device 10, through the receiving unit The controller 30 extracts data corresponding to its own channel from the input DMX512 data, and controls the LED luminaire according to the extracted data, and the data from the DMX512 data input through the receiver 20. The present invention relates to an LED luminaire supporting a DMX512 communication protocol, comprising: an output unit (40) for outputting data after data corresponding to a channel as DMX512 data, the DMX512 master device (10) and In the state where the LED luminaires supporting a plurality of DMX512 communication protocols are connected in series, each luminaire is received from the master device 10. It extracts one or more of the data Data in sequence.

That is, the DMX512 data packet transmitted from the master device is transmitted to the closest first LED luminaire # 1, and the first LED luminaire # 2 transmits data corresponding to its own sequence number in the received DMX512 data packet. Extract one or more The first LED luminaire controls the LED of the LED luminaire according to the extracted data, and transmits the data after the extracted data to the second LED luminaire # 2. The LED luminaire also extracts data corresponding to its own channel and transmits the data after the extracted data to the third LED luminaire # 3.

As described above, each LED luminaire receives data sequentially in the order of serial connection to the master device 10 without setting a separate channel order, and transmits data after extracting data corresponding to its own channel. .

Thus, by using the LED luminaire supporting the DMX512 communication protocol, it is possible to simply configure the LED lighting system.

More specifically, as shown in FIG. 1, the signal transmitted from the DMX512 master device 10 is transmitted to the first LED luminaire # 1 and the channel order is sequentially determined. That is, the channel number # 1 is set in the first LED luminaire # 1 directly connected to the DMX512 master device 10, and the second LED is connected to the first LED luminaire # 1. Channel number # 2 is set in the luminaire # 2. In this way, the channel sequence is set sequentially up to the last LED luminaire.

In addition, each LED lighting fixture extracts data corresponding to its own channel from the DMX512 data signal inputted to it. Here, the channel refers to a channel corresponding to a sequence number connected in series with the DMX512 master device 10. For example, since LED luminaire # 1 is first connected to the DMX512 master device 10, the channel of the LED luminaire # 1 becomes "1". Meanwhile, the LED luminaire # 2 is connected to the DMX512 master device for the second time, so that the channel of the LED luminaire # 2 becomes “2”.

The channels of the respective luminaires do not set the channel order separately, but only the number of luminaires closest to the DMX512 master device 10 among the plurality of luminaires connected in series with the DMX512 master device 10. It means information about.

On the other hand, there is a delay of one byte transmission time in the process from when the DMX512 data is inputted to the first lighting device # 1 to being outputted. Therefore, the total time delay until sequentially receiving and outputting the DMX data in all receiving apparatuses is proportional to the number of luminaires.

Meanwhile, each luminaire extracts data corresponding to its own channel. For example, the luminaire # 1 corresponds to the first channel of the DMX512 data signals for a plurality of channels transmitted from the DMX512 master device 10. Extract the data. The brightness of the lighting apparatus is controlled based on the extracted data packet.

In addition, each lighting device may not include a separate dip switch for setting the order of the channels. In addition, there is no need for a separate splitter or repeater, and it can be continuously connected in a daisy chain method regardless of length.

 The DMX512 receiver 20 performs a function of receiving a DMX512 data packet signal transmitted from the DMX512 master device 10, and the controller 30 corresponds to data corresponding to its own channel among the data received by the DMX512 receiver 20. The DMX 512 output unit 40 transmits the remaining data to the DMX 512 receiver 20 of the other lighting device except for the data extracted by the controller 30 from the data received from the DMX 512 master device 20. Function

On the other hand, since each receiving device is connected in a daisy chain type, since the receiving unit 20 and the output unit 30 of the lighting device have a single input-single output method, the load is small and the connection distance between the receiving devices can be short. Therefore, it is robust to noise. In addition, since the waveform is reshaped by the clock in each system, it is possible to minimize the problem of the waveform pattern by the transmission line.

3 is a timing diagram of data transmitted from the master device 10 to the receiving device 20 in a DMX environment.

The MTBP IDLE section 90 is a section in which the high signal is maintained for a predetermined time in front of the "BREAK 100" section. Along with the "BREAK (100)" section, it is a section in which the transmission of the data frame from the master device 10 to the receiving device starts.

Table 1 shows timing charts applicable to the waveform diagram of FIG. 3.

As shown in Table 1, the MTBP IDLE interval 90 may be adjusted in the range of 0 to 1 sec. However, the numerical values shown in Table 1 are merely examples and are not limited to the present invention.

The brake section 100 is a section indicating that data transmission starts from the master device 10 to the luminaire. As shown in Table 1, the brake section 100 maintains a low level for 88 to 1000000 micro second. Synchronization of the master device 10 and the receiver 20 is achieved by transmitting the low level brake signal to the receiver of the luminaire.

The MAB section 110 is a section indicating that the brake section 100 is finished.

The START CODE section 130 is a section where the information section starts, and includes a start bit 120, a data bit 125, and a stop bit 140. do.

Meanwhile, the MTBF section 150 lasts from 0 to 1000000 microseconds at the end of the start code section 130. In this section, it separates the signal between each channel.

After the MTBF section 150, the section containing the information signal of the first channel appears. This section consists of a start bit (START BIT) 155 of the first channel, a data bit (DATA BIE) 160 of 8 bits, and a stop bit (STOP BIT) 170.

When one section ends, sections of other channels repeatedly appear, and data is transmitted from the master device 10 to the receiver 20 of the lighting device.

As the data is transmitted as described above, DMX512 data is sequentially received from each receiving device in the order in which the master device 10 is closely connected in series, without having to separately set the channel order of each lighting device. By extracting the data corresponding to its own channel, using the extracted data to control the built-in LED, and sending the data afterwards, it is possible to simply configure the entire lighting system, to be easy to install and install, and to contribute to cost reduction. .

The above embodiments are for explaining the present invention, and the scope of the present invention is not limited to the embodiments, and may be modified or modified by those skilled in the art within the scope of the present invention defined by the appended claims.

For example, the shape and structure of each component specifically shown in the embodiment of the present invention can be modified.

1 is a diagram illustrating a connection relationship between a master device and a receiver of an LED luminaire in a DMX512 environment.

2 is a view showing a detailed configuration of the LED lighting fixture.

3 is a diagram illustrating a timing chart of data transmitted from a master device to a receiver of an LED luminaire in a DMX512 protocol environment.

4 is a diagram illustrating a DMX data reception and transmission flowchart.

   Explanation of symbols on main parts of the drawings

10: DMX512 master device 20: receiver

30 control unit 40 output unit

# 1: lighting fixtures # 2: lighting fixtures

# 3: third lighting fixtures n: nth lighting fixtures

90: MTBP IDLE section 100: BREAK section

110: MAB section

120, 155: (Start bit) START BIT section

125, 160: Data bit section 130: Start code section 140, 170: Stop bit section

Claims (5)

A plurality of LED luminaires on lighting systems with the DMX512 communication protocol, Receiving unit for receiving the data (DATA) generated in the DMX512 master (MASTER) device; A controller which extracts data corresponding to its own channel from the DMX512 data input through the receiver, and controls the LED luminaire according to the extracted data; And And an output unit configured to output data subsequent to data corresponding to a channel from the DMX512 data input through the receiver as DMX512 data. The method of claim 1, And the output unit sequentially outputs the remaining DMX512 data except for the channel information signal corresponding to its own channel to a neighboring receiver connected in series. The method of claim 1, The output unit supports the DMX512 communication protocol, characterized in that, after receiving the DMX512 data generated from the DMX512 master device, the remaining DMX512 data except for the channel information signal corresponding to the channel thereof is delayed by 1 byte. LED lighting fixtures. The method of claim 1, The receiver unit supports the DMX512 communication protocol, characterized in that for automatically recognizing the channel sequence in the order of being connected in series to the DMX512 master device. The method of claim 1, The channel information signal corresponding to its own channel extracted by the controller is a channel information signal that appears first after the first channel separation section in the DMX512 data input from the receiver. .

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