Five ways to troubleshoot LED display | led pedestrain light
If the LED display fails, it will definitely cause trouble to the insiders. But trouble is to solve, but how to solve these problems? Today, let’s learn about 10 ways to troubleshoot LED displays. 1. The display screen does not work, and the green light of the sending card flashes (made into a retractable type) 1. Failure reason: 1) The screen has no power supply; 2) The network cable is not connected well; 3) The receiving card has no power supply or the power supply voltage is too low; 4) The sending card is broken; 5) The signal transmission intermediate device is connected or has a fault (such as: function card, optical fiber transceiver box); 2. Troubleshooting method: 1) Check that the power supply of the screen body is normal; 2) Check and reconnect the network cable; 3) Ensure that the DC output power supply of the power supply is within 5-5.2V; 4) Replace the sending card; 5) Check the connection or replace the function card (optical fiber transceiver box); 2. The display does not work, and the green light of the sending card does not flash 1. Failure reason: 1) DVI or HDMI cable is not connected well; 2) There is no setting for copy or extend mode in the graphics card control panel; 3) The software has chosen to turn off the power of the large screen; 4) The sending card is not inserted in place or there is a problem with the sending card; 2. Troubleshooting method: 1) Check the DVI cable connector; 2) Reset the copy mode; 3) The software chooses to turn on the power of the large screen; 4) Reinsert the sending card or replace the sending card; 3. It prompts "the big screen system is not found" when starting up 1. Failure reason: 1) The serial port or USB cable is not connected to the sending card; 2) The computer COM or USB port is broken; 3) The serial po
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Lightning protection knowledge of LED traffic lights |200mm led traffic light
Walking on the streets and alleys of urban roads, the most familiar thing is the alternating flashing of various traffic lights. Busy cars moved forward and stopped regularly amid the flashing of red, yellow and green lights. The traffic signal lights erected on the pillars of the intersection are to promptly indicate relevant information to the passing vehicles. Because of its high erection position, it is easy to be damaged by direct lightning. The power line is introduced by the signal control machine, and there is no signal line. There is a threat of direct lightning strike and power line overvoltage. Therefore, it will directly strike over voltage and power line. Voltage is the focus of protection. The pillars of the traffic signal lights are installed with current-limiting lightning rods for direct lightning protection. The top of the bracket and the base of the current-limiting lightning rods must ensure reliable electrical and mechanical connection. The bracket itself is grounded or the 40×40 flat steel is connected to the grounding grid of the bracket frame itself. The grounding resistance must be less than 4 ohms. Use over-voltage protectors as power protection at the power leads of traffic lights and signal controllers, and pay attention to waterproof, moisture-proof, and dust-proof. The over-voltage protectors are connected to the grounding pole of the main frame with multiple copper wires of no less than 25mm2, and the grounding resistance is less than 4 ohms. Grounding protection. For a standard crossroad, the pillars and front-end equipment are scattered, and it is difficult to achieve single-point grounding. In order to ensure the equipment working grounding and personal protective grounding, only vertical grounding bodies are welded under each pillar. The mesh structure method is the multi-point grounding method, which is mainly aimed at the lightning protection requirements such as the gradual discharge of the incoming waves. To ensure pers
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What are the core functions of led active light-emitting signs? | Led sign
Led sign The led active light-emitting sign is to embed LED light-emitting tubes in the text, numbers, letters, symbols, and borders of the logo page, and light the LED light-emitting tubes through external mains or solar power supply to realize the key information elements of the logo page. A luminous traffic sign. LED active light-emitting signs are widely used in traffic safety engineering because of their unique core functions. So, what are the main core functions of led active light-emitting signs? (1) Long-distance visibility The led active light-emitting sign has super long-distance visibility. Generally, the static visual recognition distance is greater than 250 meters; the dynamic visual recognition distance is greater than 210 meters. Through long-distance visual recognition, the driver can find the traffic language information displayed by the sign, which can win more time for correction of driving behavior and improve the overall traffic safety of the road section. (2) Wide-angle visibility The led active luminous sign board does not need to rely on the illumination of the high beam. Through its own luminous effect, it can achieve a large angle of visibility, especially the signs installed on the top of the gantry and on the side of the wider road. The ordinary signs are due to The reflection limitation of the retro-reflected light cone often results in scotopic vision. The led active light-emitting sign can achieve a large viewing angle close to 90 degrees. (3) Enhance the warning effect The led active light-emitting sign can use the preset control module to realize the dynamic flashing effect of the light-emitting light source of the sign, enhance the warning effect and easy capture of the sign, and improve the driving safety of the drivers on the road section. (4) Light penetration in severe weather The led active light-emitting sign board adopts super light-transmitting LED light-emitting tube. In the harsh traffic environment such as rain,
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External dot matrix active luminous sign led luminous sign | Top quality led road signs
Top quality led road signs External dot matrix active luminous signs, also known as "dot matrix luminous signs", "LED active luminous road traffic signs", industry abbreviation: "dot matrix signs". External dot-matrix active light-emitting signs adopt advanced digital control equipment, and LED light-emitting tubes are embedded in the information contours of the text, patterns, numbers and other information in the sign panel to realize the active light-emitting effect of the sign content. Jiangsu Tongyun Transportation Development Co., Ltd. is a manufacturer specializing in the production of active luminous signs in Jiangsu. Its technical information is as follows: (1) Technical description 1. Process description: Embed LED light-emitting tubes on the outlines of the graphics, text, symbols, etc. of the logo layout to form a linear luminous effect to meet the visual fusion effect and achieve the effect of effective visual recognition and recognition of the key information of the logo. 2. Aluminum alloy profiles are used for the encapsulation around the luminous sign, and the corners are connected by arc elbows. The overall thickness of the sign is ≤60mm (excluding the back plate fasteners), and the waterproof and dustproof measures meet the requirements of IP55. 3. The LED mounting hole on the logo page is punched by laser numerical control equipment. The diameter of the hole is regular and regular without deviation. The edge of the reflective film should be smooth and tidy without burrs. 4. The normal luminous intensity of a single LED at rated current: red≥5000mcd, yellow≥3000mcd, white≥6000mcd; LED half-strength angle θ1/2≥12.5 degrees. 5. Light control program: When the full power supply is connected, it can automatically turn on/off the sign light-emitting unit according to the surrounding light changes. 6. Visual recognition distance: dynamic visual recognition distance at night ≥ 210 meters, static
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Functional advantages of LED active luminous traffic signs | Best price led traffic signs manufacturers
Best price led traffic signs manufacturers LED active light-emitting road traffic signs (hereinafter referred to as "active light-emitting signs") are more and more popular because of their superior performance and quality in special traffic environments and bad weather compared to ordinary retroreflective signs. It is widely used in traffic safety engineering. Traffic language information such as road conditions, risk factors, management instructions, etc., are reflected in the traffic sign layout through the use of standard traffic language formats, so that road traffic participants can identify them in a timely, accurate and effective manner, aiming to achieve road traffic safety, Efficient and orderly. According to the conclusion of the special study: the human body’s sense of perception is formed by the five senses of sight, hearing, smell, touch and taste, of which visual cognition accounts for as much as 83%. Therefore, as a visual carrier of traffic language, traffic signs can ensure effective recognition in all-weather and harsh environments, and their importance to drivers is self-evident. The working principle of ordinary retroreflective traffic signs: a beam of incident light illuminates the reflective material from the front, is internally refracted, and then penetrates the reflective material in the reverse direction, and reflects back in the direction parallel to the incident light, so that the light in a certain observation area The observer captures the reflected light, also known as "retro-reflection", which belongs to the category of passive light sources. Juli Technology is mainly engaged in the whole process of design, R&D, production, sales and service of road traffic luminous signs, intelligent traffic guidance screens, variable/tidal lanes, all-point information screens, intelligent composite screens and warning lamps series. The company has always Adhering to the business philosophy of "professionali
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