CN204442782U - A kind of LED point light source dynamic landscape lamp - Google Patents

Abstract

The utility model discloses an LED point light source dynamic landscape lamp, which is composed of three parts: LED light scene editing software on a PC, an LED light source controller and an LED point light source. The LED lighting scene editing software converts the played pattern into LED lighting control data in the corresponding RGB format, and transmits it to the LED light source controller through the USB data line; the LED light source controller converts each lighting control data into a serial standard DMX512 protocol The signal is output to each LED point light source for playback; the LED point light source is composed of super bright RGB three-color LED dot matrix, and each RGB three-color LED is equipped with a DMX512 decoding driver chip TM1803 for control. The utility model adopts the embedded LED control system scheme of the synchronous DMX512 protocol, and realizes stable communication with the PC through the USB interface. Various requirements for artistic effect control.

Description

A dynamic landscape light with LED point light source

technical field

The utility model belongs to the field of electric light sources, in particular to an LED point light source dynamic landscape lamp for gardens and courtyards.

Background technique

With the improvement of people's living standards, the demand for ecological civilization continues to increase. Public greening in cities and countryside as well as private greening in households is increasing. In order to heighten the atmosphere and cultivate sentiment, landscape lights are added to the green areas. Traditional landscape lighting mainly uses neon lamps, incandescent lamps and fluorescent lamps as light sources. This kind of light source has a series of shortcomings such as low light efficiency, high power consumption, short life, single color change, and complicated control methods. It has been difficult to meet people's requirements.

Compared with traditional light sources, LED light sources have higher luminous efficiency, lower power consumption, and higher economic benefits because they do not generate heat during the light-emitting process. Therefore, LEDs are gradually replacing traditional light sources in markets such as landscape lighting, interior decoration, automotive lights, and LCD backlights, becoming the third-generation electric light source after incandescent lamps and fluorescent lamps. However, the existing LED landscape lights are generally monochromatic, and the rendering effect of monotonous colors is not good. For this reason, Chinese invention patent CN103415127A announced a kind of intelligent color LED landscape lamp control system and method, which can realize the debugging and display of LED color. However, the color change of the LED is not dynamic, and the various colors of light do not form a dynamic pattern, which cannot provide a good dynamic effect and cannot achieve the desired aesthetic effect, so that the effect of improving the mood of the viewer is not ideal.

Utility model content

In order to solve the above technical problems, the utility model provides an LED point light source dynamic landscape lamp for gardens and courtyards.

In order to achieve the above object, the technical scheme of the utility model is as follows:

The utility model provides an LED point light source dynamic landscape light for gardens and courtyards, which is composed of LED light scene editing software on a PC, an LED light source controller and an LED point light source. The LED lighting scene editing software can be used for lighting pattern change design, playback scene speed design, and Flash animation import. At the same time, it can use its own conversion tool to convert the played pattern into LED lighting control data in the corresponding RGB format, and through the USB data cable transmitted to the LED light source controller. The LED light source controller is composed of ARM, external memory, real-time clock, USB port, 2 synchronous ports and 4 DMX512 ports; the LED light source controller converts the LED light control data of each RGB format into a serial standard The DMX512 protocol signal is output to each LED point light source for playback. The LED point light source can be disengaged from the LED lighting scene editing software on the PC and played automatically under the control of the LED light source controller, without the need for a PC. The LED point light source is composed of ultra-bright RGB three-color LED dot matrix. Each RGB three-color LED is equipped with a DMX512 decoding driver chip TM1803 for control. The TM1803 chip adopts a cascade control method. The colors of the RGB three PWM channels of the TM1803 chip are simultaneously refreshed through a data frame.

The ARM of described LED light source controller selects STM32F103 chip; Described external memory comprises the synchronous dynamic random access memory (SDRAM) that is used to provide the space of downloading and running, provides the Flash of cache memory for network data, is used to store the landscape light lighting pattern file. SD card; the real-time clock is realized by a crystal oscillator, and the input clock frequency is 72MHz.

The RGB three-primary color LEDs on the LED point light source are installed on a circular substrate. The RGB three-primary-color LEDs are centered on the center of the substrate and arranged in seven rings from inside to outside. The number of RGB three-primary color LEDs installed in each ring is respectively 8 LEDs, 16 LEDs, 25 LEDs, 35 LEDs, 45 LEDs, 55 LEDs and 75 LEDs, each RGB tricolor LED in each ring is arranged in a circle at equal intervals.

The RGB three-color LED on the LED point light source has a viewing angle of 120°, a diameter of 5mm, four pins, a common anode, and a circular shape; the red light has a wavelength of 625nm, a standard operating current of 20mA, and a standard luminous intensity of 2.5 candela; green light Wavelength 530nm, standard working current 20mA, standard luminous intensity 4 candela; blue light wavelength 470nm, standard working current 20mA, standard luminous intensity 1 candela.

The diameter of the substrate is 200mm, and the diameters of the circles formed by connecting the center points of the seven-ring RGB tricolor LEDs from the inside to the outside are 30mm, 55mm, 80mm, 105mm, 130mm, 155mm and 180mm respectively.

The power of the LED point light source is 15W, the power supply voltage is DC24V, the lamp body is made of die-cast aluminum, the lampshade is made of PC material, and the protection level of the lamp body is IP65.

The beneficial effects of the utility model are: the utility model adopts the embedded LED control system scheme of the synchronous DMX512 protocol, and realizes stable communication with the PC through the USB interface. Landscape lighting can also provide colorful colors and dynamic patterns, beautify the environment, have strong appreciation, good visual agility, full visual impact, and good aesthetic effects, which can improve the mood of the viewer and improve the leisure and rest of the viewer. High efficiency, suitable for landscape lights in gardens and courtyards.

Description of drawings

Fig. 1 is the structural representation of the utility model.

Fig. 2 is a structural diagram of the LED light source controller system of the present invention.

Fig. 3 is an arrangement diagram of RGB tricolor LEDs on the substrate of the present invention.

Fig. 4 is the schematic diagram of the TM1803 chip cascade circuit of the present invention.

Fig. 5 is a circuit schematic diagram of the STM32F103 microprocessor control platform of the present invention.

Detailed ways

Preferred embodiments of the present utility model will be described in detail below in conjunction with the accompanying drawings.

In order to achieve the purpose of this utility model, as shown in Figure 1, this LED point light source dynamic landscape light is composed of LED light scene editing software 1, LED light source controller 2 and LED point light source 3 on the PC. The LED lighting scene editing software 1 on the PC is responsible for scene editing and transmission, and the effect of display content editing and the format of information storage directly affect the effect of LED point light source display. The functions of this software include: establishment and reloading of projects (corresponding to a lighting scene control system); initialization setting of parameters; dynamic addition and deletion of scenes; WYSIWYG editing, storage, preview and playback of each scene; Different display modes and running speed settings; multi-scene programming; DMX512 address mapping of LED lamps; setting of running time and cycle; setting of controller parameters and communication parameters; encoding of transmitted data frames, etc. This software can convert the animation of the design scene into a playback data file, and generate a playlist file and controller configuration file, which can be downloaded to the LED light source controller 2 through the USB port.

As shown in Figure 2, the LED light source controller 2 of this LED point light source dynamic landscape light is composed of ARM, external memory, real-time clock, USB port, 2 synchronization ports and 4 DMX512 ports. ARM processor has fast processing speed, high reliability, and low cost, and is widely used in embedded systems; external memory includes synchronous dynamic random access memory (SDRAM) for providing space for downloading and running, Flash for providing cache for network data, and The SD card used to store landscape lighting style files; the real-time clock provides accurate time for LED lighting scene control, and is realized by a crystal oscillator with an input clock frequency of 72MHz; the USB port is mainly used for communication between the LED light source controller 2 and the PC host Data transmission is the main channel for data exchange between the LED light source controller 2 and the PC host. In the specific embodiment of the present utility model, can adopt USB 2.0 as the USB interface of controller. The synchronization port is used for the connection between multiple LED light source controllers, and supports up to 4 LED light source controllers to work at the same time; the DMX512 port can control the LED lamps to achieve special effects such as transition, gradient, text, image, and animation. The working sequence of the LED light source controller 2 is: after starting, first open the controller configuration file, read the controller configuration parameters, set the parameters and address conversion table regularly; then open the playlist file, and play the lighting scene files in order.

As shown in Figure 3, the RGB three primary color LEDs on the LED point light source 3 of this LED point light source dynamic landscape light are installed on a circular substrate, and the RGB three primary color LEDs are centered on the center of the substrate circle, arranged in seven rings from inside to outside, The number of RGB three-primary color LEDs installed in each ring is 8, 16, 25, 35, 45, 55 and 75 respectively, and each RGB three-primary color LED in each ring is arranged in a circle at equal intervals. Under the control of the LED light source controller 2, the LED point light source 3 can provide at least three or more dynamic effects. When the LED landscape lights are lit, the first dynamic effect is called bubbling, that is, the LEDs light up sequentially from the inner ring to the outer ring, and the colors of each ring are different. The color changes from the inner ring to the outer ring, and the colors of the seven rings are always different, and the viewing effect is similar to bubbling. The second dynamic effect is called annihilation. The LEDs change colors in the order from the outer ring to the inner ring. This change occurs again at intervals, but the colors of the seven rings are always different, because the change is from the outer ring to the inner ring. To the inner ring, the ornamental effect is similar to annihilation. The third dynamic effect is called rotating five-pointed star. The LEDs that are lit and of the same color present a five-pointed star shape, and other LEDs are not lit. The color of this five-pointed star will change every time. When the dynamic effect is a shining five-pointed star. The sparkling five-pointed star will rotate after all color changes. In fact, the LED that was turned on last time is no longer on. At this time, another group of LEDs in the shape of a five-pointed star is turned on, and then changes according to the color change experienced by the previous five-pointed star. The viewing effect seems to be the same as the previous one. A pentagram rotates.

The ARM of this LED point source dynamic landscape light selects the 32-bit low-power consumption CORTEX-M3 core controller STM32F103 enhanced chip produced by ST Company. There are two 12-bit A/D converters, seven timers, and nine communication interfaces in the chip, and the highest operating frequency is 72MHz to meet the design requirements. As shown in Figure 5, the minimum system of STM32F103RBT6 includes STM32F103 microprocessor, power module, crystal oscillator circuit, reset circuit, JTAG interface and power interface, forming a maximum operating frequency of 72MHz, power-on reset, 128kB Flash storage function, and 11 interrupts source microcontroller platform. Burn the software program inside it through the JTAG port, and finally transmit the control signal and data signal to the receiving port of the LED point light source 3 through the signal output port.

This LED point source dynamic landscape light is controlled by DMX512 bus protocol. The DMX512 bus protocol is a stage lighting control protocol released by USITT (American Theater Technology Association) in 1986. It has become an international standard protocol and is widely used by various lighting control systems. The standard DMX512 bus protocol stipulates a data frame of a specific length, and the data capacity of each data frame is 513 bytes, which includes a start code of one byte. The baud rate of the standard DMX512 protocol communication is 250kbps. Although the communication baud rate specified in the standard is 250kbps, with the development of electronic technology, the system can communicate at a higher baud rate. Users can set the specific communication baud rate by themselves according to actual requirements. The rapid development of the LED industry has also brought unprecedented speed-up for the design of LED control chips. There are many common synchronous DMX512 control chips. The utility model adopts TM1803 chip for control. TM1803 is a special circuit for three-channel LED drive control, which integrates MCU digital interface, data latch, LED high-voltage drive and other circuits inside. Through the peripheral MCU control, the chip's individual gray scale and cascaded control can realize the color dot matrix lighting control of the outdoor large screen, and the packaging form of SOP8 is adopted. As shown in Figure 4, each RGB three-color LED is controlled by a DMX512 decoding driver chip TM1803. The TM1803 chip adopts a cascade control method. The data frame is refreshed at the same time, and then the display of the display file is realized. When the LED point light source 3 receives the dimming data signal, the TM1803 chip intercepts three bytes of dimming information according to its own lamp address, and generates three PWM signals to control the constant current drive module. The range of a byte is 0-255, the gray scale of each color LED is 256 levels, and the combined color of the three primary colors LEDs theoretically has 256*256*256 gray scale levels, which meets the full-color control requirements of lighting.

The above is only the preferred embodiment of the utility model, it should be pointed out that, for those of ordinary skill in the art, without departing from the inventive concept of the utility model, some deformations and improvements can also be made. Belong to the protection scope of the utility model.

Claims (6)

1. A kind of LED point light source dynamic landscape light, is made up of three parts of LED light scene editing software (1), LED light source controller (2) and LED point light source (3) on the PC; It is characterized in that: described LED light source Scene editing software (1) can be used to design lighting pattern changes, play scene speed design, and import Flash animations. At the same time, the built-in conversion tool can be used to convert the played patterns into LED lighting control data in the corresponding RGB format, and transmit them through the USB data cable. Give LED light source controller (2); Described LED light source controller (2) is made up of ARM, external memory, real-time clock, USB port, 2 synchronous ports and 4 DMX512 ports; This LED light source controller (2) will The LED lighting control data in the RGB format of each channel is converted into a serial standard DMX512 protocol signal, output to each LED point light source (3) for playback, and the LED point light source (3) can be separated from the LED lighting scene editing software on the PC (1) Automatically play under the control of the LED light source controller (2), without the need for a PC; the LED point light source (3) is composed of ultra-bright RGB three-primary-color LED dot matrix, and each RGB three-primary-color LED is equipped with one The DMX512 decoding driver chip TM1803 is used for control, and the TM1803 chip adopts a cascaded control mode, and the colors of the RGB three PWM channels of the TM1803 chip on a control line are simultaneously refreshed through a data frame. 2. LED point light source dynamic landscape lamp according to claim 1, is characterized in that, the ARM of described LED light source controller (2) selects STM32F103 chip for use; Dynamic random access memory SDRAM, Flash for network data cache, SD card for storing landscape lighting style files; the real-time clock is realized by a crystal oscillator, and the input clock frequency is 72MHz. 3. The LED point light source dynamic landscape lamp according to claim 1, characterized in that, the RGB three primary color LEDs on the LED point light source (3) are installed on a circular substrate, and the RGB three primary color LEDs are centered on the center of the substrate circle , arranged in seven rings from the inside to the outside, the number of RGB three-color LEDs installed in each ring are 8, 16, 25, 35, 45, 55 and 75, and each RGB three-color LED in each ring The primary color LEDs are arranged in a circle at equal intervals. 4. The LED point light source dynamic landscape light according to claim 1, characterized in that, the RGB tricolor LED on the LED point light source (3) has a viewing angle of 120°, a diameter of 5mm, 4 pins, a common anode, and a Circular shape; red light wavelength 625nm, standard working current 20mA, standard luminous intensity 2.5 candela; green light wavelength 530nm, standard working current 20mA, standard luminous intensity 4 candela; blue light wavelength 470nm, standard working current 20mA, standard luminous intensity 1 candela . 5. The LED point light source dynamic landscape lamp according to claim 3, characterized in that, the diameter of the substrate is 200 mm, and the diameters of the circles formed by connecting the center points of the RGB tricolor LEDs from the inside to the outside are 30 mm and 55 mm respectively. , 80mm, 105mm, 130mm, 155mm and 180mm. 6. The LED point light source dynamic landscape light according to claim 1, characterized in that, the power of the LED point light source (3) is 15W, the power supply voltage is DC24V, the lamp body is made of die-cast aluminum, the lampshade is made of PC material, and the lamp body is protected The rating is IP65.