Select high-quality LED Display, in addition to considering the quality of the display itself, and reliable services, according to the different uses of the environment and choose the right LED display products is another protection. Here we combine the sea and the river environment to the choice of pale on the LED Display.
Riverside seaside and other environmental features of the most significant is the humidity, wind, strong ultraviolet light, easy to water and so on.
1, humidity
In the latter part of the process, caused by excessive humidity PCB LED display board, power supply, power lines and other devices to more easily zero oxidation corrosion and malfunction. So it requires us to make LED display when the PCB board to do its anti-corrosion treatment, such as its surface coated with three yellow paint, power supply and power cord to use high quality parts, welding is the easiest place to corrosion, to Note that doing protection work, in particular that framework, easy to rust, do the best rust treatment.
2, wind
The wind is too large, the most direct is the installation of LED Display works, so before you want to install the display, we are required to do when the stress analysis, taking fully into account the wind factor.
3, UV
Strong ultraviolet radiation, is more likely to cause aging of the surface of the LED display, thus reducing its life, making good use of the material when the mask is conducive to resist ultraviolet damage.
4, water
Most of the main consideration is usually the waterproof rain and sea water environment of river and other special need to consider a more comprehensive, well waterproof measures from all directions.
5, angle
This is an easily overlooked factor in this environment, usually more open perspective, and broad audience, the choice of products to take full account of its main audience, to determine the requirements of the display view.
January 15th, 2011
Solar LED Lighting Control System
237 Comments, LED Lighting, by led.The research object is the solar LED Lighting control system controller processor. System controller for system status through the management of the remaining capacity of the battery management, battery charging, discharge control, solar power and utility power switching control and half-power LED Tube control and other major functions. The controller is mainly depend on the operation of the processor to achieve the above functions.
1, the system constitutes
Solar LED lighting control system consists of solar cells, batteries, system controller, LED lighting load and the mains power supply 5 parts, system schematic shown in Figure 1. System normal operation, the load from the battery to the LED power supply, the battery voltage is low, the municipal power (standby power) directly to the LED load power, to avoid the battery voltage is low LED does not light load situation. With electricity as a backup power supply can be reduced in the design of battery capacity and reduce costs. While avoiding the use of solar electricity resulting waste of resources to achieve the reliability and economic requirements. Work through the solar system, the solar radiation into electricity, but due to the output of solar cells by temperature and solar radiation intensity of a great influence on the output power instability, which in the solar radiation intensity is large enough time (LED panel) need to use batteries will translate into the energy stored up, so when the need for lighting (night) to the semiconductor lighting load. Semiconductor in solar lighting system, the controller is the core of the system work through the controller to control the working status of the system and the management of battery charging and discharging process, in order to make the system work in different conditions are stable and reliable work.
The main components of the system functions as follows:
(1) solar cells. By a number of solar modules in series or parallel is made, the capacity of its synthesis can be hundreds of peak watt (Wp), also up to several trillion peak watt (Wp) is even greater, components may be silicon, polycrystalline silicon, amorphous silicon or other types of solar battery. In general, the PV array as much as the semiconductor device structure, it has a strong non-linear voltage characteristic.
(2) batteries. Battery also known as battery, solar LED lighting system is a key part. Is normally provided by a number of lead-acid batteries by series and parallel combination of the choice of its capacity should be the capacity of solar arrays to match. Its main role is to store solar arrays during the day and the electricity generated at night to release the stored energy for load lighting. It’s the best charging current and discharge current, generally based on 10h charge and discharge rates. As the battery voltage fluctuations with a / 0 buffer role, but also makes the load more stable and reliable operation of the system.LED pendant Although lead-acid batteries with large capacity, low price, but if used improperly, it is easy to accelerate the aging batteries, the battery life dramatically shortened, resulting in increased system operating costs, charge and discharge current on the battery life over city to a certain extent. Therefore, the battery charge and discharge reasonable planning and control is essential for PV charging system link.
(3) controller. The role of the controller is a solar cell, battery voltage, mains power supply and LED load for the overall monitoring. To provide the best battery charging current and voltage, while protecting the battery, avoid charging and over-discharge phenomenon. Necessary to complete solar power and electricity switching between 2, to ensure stable and reliable LED work load.
(4) LED lighting. Semiconductor LED light source is an important component of the system. LED should ensure high brightness and uniform brightness range of radiation used by a small number of white LED. Controller load control strategies and LED grille circuit directly determines the system’s lighting effects. Therefore, under the LED response speed and low voltage DC drive and other features, select the appropriate driver program and control strategies to achieve the match with the battery voltage in order to give full play to the advantages of LED lighting.
(5) electricity supply. In the event of rainy weather, the battery can not charge it in time, there battery voltage is low, not the normal power to the load, by switching power supply to 220V AC power converted into low voltage direct current for the LED Display. Control system design for mains power supply provides a low-voltage DC input.
January 14th, 2011
General specification for LED display
299 Comments, LED Display, by led.First, use the following abbreviations and definitions LED Display
1, LED light-emitting diodes: ligth emitting diode LED light emitting diode abbreviation
2, LED display | Display Devices: LED panel controlled by a certain way, used to display text, text, graphics, images, animation, and the prices and other information as well as television and video signals by the array of LED devices composed of a display screen.
3, display unit: display unit installed by the circuit and determine the structure and composition of a display unit of the smallest LED display.
4, fatal failure: critical defect of the use, maintenance or related to this product may cause harm to persons or unsafe condition of the failure, important characteristics of the product or unit does not meet the required quality characteristics of the product or unit serious non-compliance.
5, the control point: out-of-control point LED Tube display status and control requirements were not consistent and discrete distribution of the basic LED light points.
6, pseudo-color LED display: pseudo-color LED panel LED display in the installation of different colors in different regions of single-color LED device composed of LED display.
7, full-color LED display: all-color LED panel by the red, green and blue LED downlight composed of three primary colors and a variety of color adjustable LED display.
Second, LED display Category
1, the use of the environment: LED display by use of the environment is divided into indoor and outdoor LED display screen LED display.
2, Display color: LED spotlight by the display color is divided into single-color LED display (with pseudo-color LED display), dual-color LED display and full-color (trichromatic) LED display. By gray-scale can be divided into 16,32,64,128,256 gray LED displays.
3, the display performance: LED display by display performance LED display into the text, graphic LED display, LED display computer video, TV video LED display and LED display market and so on. LED displays generally include the securities market, interest rates, futures and other uses LED display.
4, the basic point of non-market class of light-emitting LED display, LED bulb LED display screen by using the diameter of a single point can be divided into Φ3mm, Φ3.75mm, Φ5mm, Φ8mm, and Φ10mm and other displays; outdoor LED displays used by pixel diameter can be divided into Φ19mm, Φ22mm and Φmm26 other LED display. Class LED display market by using digital tube size can be divided into 2.0cm (0.8inch), 2.5cm (1.0inch), 3.0cm (1.2inch), 4.6cmm (1.8inch), 5.8cm (2.3inch), 7.6 cm (3inch) and other LED displays.
Third, LED display hardware and software environment
1, the hardware to use the environment
LED display LED display hardware including the type, size, use the on-site conditions to determine the general-purpose computer parts, communication lines, dedicated data conversion section and LED strip section. Should be given detailed instructions:
(1) mainframe computer, a variety of matching cards, external devices and communication interface requirements;
(2) the requirement of communication lines and indicate the maximum communication distance;
(3) The data conversion part of the means of communication with the host computer;
(4) Power supply requirements and structure installation requirements.
2, the software environment
LED Display on the different properties should be configured to meet the requirements of the display shows software, which has the following features:
(1) comply with serialization and standardization of requirements, can be backward compatible;
(2) the detailed specification provided by the operating system and language;
(3) with a comprehensive self-test procedures and necessary diagnostic procedures with various levels;
(4) special purpose LED Display with their corresponding special software.
Fourth, the appearance and materials
1, Appearance: LED Tube frame no scratches. Outdoor LED display pixel pipe installation should be the same, no loose
Action and shell breaking out.
2, Material: LED display part can be steel, aluminum, wood and other materials. Requirements of rugged and beautiful.
Fifth, security, power | voltage regulator, temperature and humidity
1, security
LED display is GB4943 Class I safety equipment provided.
(1) LED display protective grounding terminal.
(2) safety mark
① protective ground terminal should display tags.
② LED display and switch the power supply in the fuse should be a warning sign.
(3) Earth leakage current: LED display on the ground leakage current shall not exceed 3.5mA (AC RMS).
(4) Dielectric strength: LED display available 50HZ, 1500V (AC RMS) of the test voltage 1 min insulation breakdown should not occur.
2, Power Supply: LED display of the power supply is 220W ± 10%, 50HZ ± 5% or 80V ± 10%, 50HXZ ± 5% should be provided in the detailed specification units of various types of LED display shows the largest area 15w panel power or total power consumption.
3, temperature:
Ambient temperature of the indoor screen: the working environment temperature: 0 ° C; temperature: +40 ° C. Storage ambient temperature: -40 ° C; temperature: +60 ° C.
Room shielding of the ambient temperature: the working environment temperature: Optional -20 ° C, -10 ° C; temperature: +50 ° C. Storage ambient temperature: -40 ° C; temperature: +60 ° C.
4, humidity: at the maximum operating temperature, LED display should be in the relative humidity of 90% of normal working conditions.
VI, LED display performance characteristics
1, the performance: the text and graphic LED display should be provided in the detailed specification moved out of the way and displayed. Computer video LED screen should have: animation capabilities. Animated display LED display requires the computer monitor shows the same corresponding area; text display. Requirements of the text is solid, clear and crosstalk; gray scale features. Requires a detailed specification in the gray level specified. TV video LED display addition to animation, text display, grayscale functions, should be able to show TV, video screen. Quotes LED display market with its corresponding display capabilities.
2, uniformity: Detailed specifications should be provided in the LED display on the uniform requirements.
3, the control point: Indoor LED Display is not more than ten thousandths out of control points, outdoor LED display of the control point should be not more than three thousandths; and for the discrete distribution.
January 14th, 2011
developer of LED Lighting products
13 Comments, LED Lighting, by led.Developed by ART + COM, in relation to the G-LEC, a developer of LED Lighting products, the facility consists of surface mount white LED launched in 20 mm blank printed circuit boards.
In the heart of the system is the ability to individually control each of the 1. LED 75 million, plus the means to cut each PCB in increments of pixels in size to accommodate the installation tightly around the shape of space, including bridges, arches and wall fixings.
A total of 700 square meters is covered with circuit boards, the main challenge for a space to ensure that all witnesses were in the exact color temperature of 5600K.
The walls are then translated into a front for the media with the addition of large panels of sandblasted glass placed at a specified distance ahead.
A special wall-mounted spider was developed to support seamless PCB mount on the wall, with special covers to mask the joints.
The development of the facility, which was the project managed by G LEC, took 18 months. More details on LED Tube G-LEC Chimera system can be seen in the press release of the company.
January 13th, 2011
LED Lighting will shine
1 Comment, LED Lighting, by led.During the day, an oak wall display – used by the city’s nickname is “City of Oaks” – that changes shape and disappears as the squares of aluminum in the front of the flap in the wind.
At night, however, the LED Lighting will shine, as 1344 LEDs backlight the wall. The wall contains 28 installations that are 4 feet long and has 12 LEDs per meter.
There are 14 bays with two games to the bay, and RGB optical lenses are used. The input is 24VDC accessory to ~ 25 W / m. The LEDs are controlled by a DMX512 via a database controlled power supply.
Wall fixtures can be programmed to flash and display more than one million different colors. The LED Tubes will allow the wall to display bright colors of Carolina Hurricanes one night, and different shades of green on St. Patrick’s Day, the next night.
Raleigh was the first city to join the “LED Display City” which is a growing community of parties in government and industry working to promote and implement LED lighting technology across the range of municipal infrastructure.
The location
The wall of brightness, whose architect is Thomas Sayre, adorns the McDowell Street side of the new convention center in downtown Raleigh.
The facility consists of 79. 464 of 4 in the squares of aluminum foil LED downlight panel hung on in the nets of 4 square feet, allowing them to ripple in the breeze above the 80,000 cars passing daily on McDowell Street.
If the wall was not reflected in place, passersby are forced to look at a wall covering up the convention center’s air conditioning system. The wall of the houses cooler the installation of 500,000 square meters and boilers that require significant air flow, however, the wall is visible as motorists enter downtown Raleigh from the south.