Those who need to know information about LED displays in the project
Those who need to know information about LED displays in the project
Here first of all there is a big misunderstanding, most people think that the screen of the main material LED, IC life expectancy of 100,000 hours, according to 365 days / year, 24 hours / day operation, life expectancy of more than 11 years, so the majority of customers are only concerned about the well-known LED and IC. in fact, these two are only necessary conditions, but not sufficient conditions, because the red, green and blue lamps of the three kinds of reasonable use of the display is more important. More importantly, for different colors of lamps, to make it work in the best state, for a good display will be more important. IC's reasonable adjustment, but also help to overcome the PCB's unreasonable wiring problems. Just like a car with a good engine and circuit control, it does not necessarily make a good car. The key factor here is this:
As LED, IC belongs to the semiconductor devices, they are picky about the environmental requirements of the conditions of use, preferably at room temperature of about 25 ℃, its working mechanism is the best. But the fact that a large outdoor screen will be applied in different temperature environments, summer may be above 60 ℃, winter may be below -20 ℃. When the manufacturer produces the product is 25 ℃ for the test conditions, the different products are categorized into different grades, can be the fact that the operating conditions of 60 ℃ or -20 ℃, then the LED, IC efficiency and performance inconsistency, may be the original belongs to a grade will become more than one grade, the brightness is inconsistent, the screen also naturally become flowery. This is because in different temperature conditions, red, green, blue three lights brightness attenuation and decline is different, at 25 ℃, its white balance is normal, but at 60 ℃, the three colors of the LED's brightness has declined, and its attenuation value is inconsistent, so it will produce the whole screen brightness decline and off-color phenomenon, the quality of the whole screen will decline. The operating temperature range of IC is from -40℃ to 85℃. Due to the external temperature is too high and lead to the temperature inside the box, if the temperature inside the box is more than 85 ℃, IC will be too high because of the temperature and lead to work instability, or temperature drift is different and produce the current between the channel or the difference between the chip is too large and lead to the screen.
At the same time, the power supply is also very important, because the power supply in different temperature conditions, its stability, output voltage value and load capacity will be different, because it is responsible for the role of logistical support, so its ability to protect the screen directly affects the quality of the screen.
Box design is also very important for the display, on the one hand, its circuit protection, on the other hand, the role of security, as well as dustproof, waterproof role. But more importantly, is the ventilation and cooling of the thermal circuit system design is good, with the prolongation of boot time and the rise in external temperature, the thermal drift of the components will also increase, resulting in poor image quality.
All these factors are interrelated and will affect the quality and life of the display. So customers should also observe and analyze comprehensively and make correct judgment when selecting the screen.
Temperature for the impact of the large screen is not only so, assuming that the customer purchased a wide 10 meters high 6 meters (60 square meters) of the large screen, although the total area is not large, but the internal composition of each unit box, the temperature between the unit box is not necessarily balanced, the temperature inside the box will be affected by the air convection and the temperature is inconsistent, resulting in the unit between the box, or the unit box inside the body of the temperature is not the same, bringing semiconductor device Work efficiency is inconsistent, which is manifested in inconsistent luminous brightness of the LED lights, looks “flower” screen. Do not underestimate the outdoor temperature, we just think about the summer in the car can be cooked eggs example can be imagined. Not to mention that the LED display in the summer sun is still to light up the display. (issued by the light to be stronger than the sunlight to be effective), its luminous will be hot, these are the factors affecting.
And hot and cold temperatures to fight not only the fragile and delicate LED, IC and other semiconductor devices, including sturdy ABS, mask, iron box, connectors, all kinds of welding points, mask in the sun and low temperature under the sun and scrape the frozen rain after the wet multiple clamping, resulting in part of the deformation of the warping angle of up to 2-3mm, the other ultraviolet irradiation also makes the mask plate color changes, so that in the year a variety of climate change under the audience to see the The mask plate itself will be discolored, there is a spot plate, deformation will block the light-emitting angle of the light-emitting tube to produce light dark area; deformation will also affect the PCB board curvature, resulting in welding points are not secure, resulting in false welding makes the LED when bright when out. And because of the air moisture and oxidation lead to the plug oxidation contact surface reduction, coupled with vibration and deformation of the subtle impact of the plug micron-level plating did not form a tight contact, resulting in signal or power interruption, large screen failure.
Deformation and mechanical fatigue will also affect the iron box and the outer frame, resulting in the screen body uneven, the module and the iron box can not be a tight fit, part of the leakage and other consequences.
Therefore, to choose a good big screen, the first line must choose a good lamp, durable adaptability, and other materials and process assessment should not be taken lightly, just as the car, a few people's workshop, you can also put together a car, tens of thousands of people's factories are also in the assembly of a car, but the number of kilometers of the car and the protection of the coefficient of the car should be very different. Outdoor screen waterproof anti-deformation, processing technology and key accessories, as the same, missing a tiny bit, the difference is a thousand miles.
In addition to consider the quality of the LED, IC and other major components, and the seller's prior communication is also very important. It not only directly affects the quality of the entire project, success or failure, but also often allows the user to more reasonably allocate the resources invested, to avoid unnecessary waste, loss and hidden danger, and even increase considerable revenue.
Manufacturers should also take the initiative for the user on the actual demand and operability to provide simulation programs or better suggested solutions to help customers rational analysis, planning, to make the most cost-effective program, in order to become a reliable partner of the user. Communication matters include the following points:
1, clear their needs, input budget and the expected best results;
2, a detailed indication of the needs of the project and the future development plan, the seller is required to provide the best implementation program, and even expand the project's expandable features and expand the budget, plan to avoid unnecessary waste of resources due to the project is not suitable for future development needs;
3、Provide or require manufacturers to analyze the project installation and application environment data, predictable events and put forward preventive and solving measures, and then make a comprehensive assessment of the whole project plan;
4, different LED production process, screen assembly process, installation technology experience, will directly affect the entire project duration, cost, safety performance, display effect and quality, service life and maintenance costs, so beforehand must be from the manufacturer or multi-faceted understanding, comparison of the product and the project in all aspects of the performance characteristics, to select the most suitable for their own needs of the program;
5, to understand the manufacturer's strength, integrity, service content and quality, these are the project can be a good and long-term cooperation basis and guarantee.
Clearly to consume, easy to use, I wish every need to use the big screen customers, can buy a product that they are satisfied with, I also wish the big screen display industry in the user's continuous demand, to go bad and save the best, to achieve a higher level of quality.
As LED, IC belongs to the semiconductor devices, they are picky about the environmental requirements of the conditions of use, preferably at room temperature of about 25 ℃, its working mechanism is the best. But the fact that a large outdoor screen will be applied in different temperature environments, summer may be above 60 ℃, winter may be below -20 ℃. When the manufacturer produces the product is 25 ℃ for the test conditions, the different products are categorized into different grades, can be the fact that the operating conditions of 60 ℃ or -20 ℃, then the LED, IC efficiency and performance inconsistency, may be the original belongs to a grade will become more than one grade, the brightness is inconsistent, the screen also naturally become flowery. This is because in different temperature conditions, red, green, blue three lights brightness attenuation and decline is different, at 25 ℃, its white balance is normal, but at 60 ℃, the three colors of the LED's brightness has declined, and its attenuation value is inconsistent, so it will produce the whole screen brightness decline and off-color phenomenon, the quality of the whole screen will decline. The operating temperature range of IC is from -40℃ to 85℃. Due to the external temperature is too high and lead to the temperature inside the box, if the temperature inside the box is more than 85 ℃, IC will be too high because of the temperature and lead to work instability, or temperature drift is different and produce the current between the channel or the difference between the chip is too large and lead to the screen.
At the same time, the power supply is also very important, because the power supply in different temperature conditions, its stability, output voltage value and load capacity will be different, because it is responsible for the role of logistical support, so its ability to protect the screen directly affects the quality of the screen.
Box design is also very important for the display, on the one hand, its circuit protection, on the other hand, the role of security, as well as dustproof, waterproof role. But more importantly, is the ventilation and cooling of the thermal circuit system design is good, with the prolongation of boot time and the rise in external temperature, the thermal drift of the components will also increase, resulting in poor image quality.
All these factors are interrelated and will affect the quality and life of the display. So customers should also observe and analyze comprehensively and make correct judgment when selecting the screen.
Temperature for the impact of the large screen is not only so, assuming that the customer purchased a wide 10 meters high 6 meters (60 square meters) of the large screen, although the total area is not large, but the internal composition of each unit box, the temperature between the unit box is not necessarily balanced, the temperature inside the box will be affected by the air convection and the temperature is inconsistent, resulting in the unit between the box, or the unit box inside the body of the temperature is not the same, bringing semiconductor device Work efficiency is inconsistent, which is manifested in inconsistent luminous brightness of the LED lights, looks “flower” screen. Do not underestimate the outdoor temperature, we just think about the summer in the car can be cooked eggs example can be imagined. Not to mention that the LED display in the summer sun is still to light up the display. (issued by the light to be stronger than the sunlight to be effective), its luminous will be hot, these are the factors affecting.
And hot and cold temperatures to fight not only the fragile and delicate LED, IC and other semiconductor devices, including sturdy ABS, mask, iron box, connectors, all kinds of welding points, mask in the sun and low temperature under the sun and scrape the frozen rain after the wet multiple clamping, resulting in part of the deformation of the warping angle of up to 2-3mm, the other ultraviolet irradiation also makes the mask plate color changes, so that in the year a variety of climate change under the audience to see the The mask plate itself will be discolored, there is a spot plate, deformation will block the light-emitting angle of the light-emitting tube to produce light dark area; deformation will also affect the PCB board curvature, resulting in welding points are not secure, resulting in false welding makes the LED when bright when out. And because of the air moisture and oxidation lead to the plug oxidation contact surface reduction, coupled with vibration and deformation of the subtle impact of the plug micron-level plating did not form a tight contact, resulting in signal or power interruption, large screen failure.
Deformation and mechanical fatigue will also affect the iron box and the outer frame, resulting in the screen body uneven, the module and the iron box can not be a tight fit, part of the leakage and other consequences.
Therefore, to choose a good big screen, the first line must choose a good lamp, durable adaptability, and other materials and process assessment should not be taken lightly, just as the car, a few people's workshop, you can also put together a car, tens of thousands of people's factories are also in the assembly of a car, but the number of kilometers of the car and the protection of the coefficient of the car should be very different. Outdoor screen waterproof anti-deformation, processing technology and key accessories, as the same, missing a tiny bit, the difference is a thousand miles.
In addition to consider the quality of the LED, IC and other major components, and the seller's prior communication is also very important. It not only directly affects the quality of the entire project, success or failure, but also often allows the user to more reasonably allocate the resources invested, to avoid unnecessary waste, loss and hidden danger, and even increase considerable revenue.
Manufacturers should also take the initiative for the user on the actual demand and operability to provide simulation programs or better suggested solutions to help customers rational analysis, planning, to make the most cost-effective program, in order to become a reliable partner of the user. Communication matters include the following points:
1, clear their needs, input budget and the expected best results;
2, a detailed indication of the needs of the project and the future development plan, the seller is required to provide the best implementation program, and even expand the project's expandable features and expand the budget, plan to avoid unnecessary waste of resources due to the project is not suitable for future development needs;
3、Provide or require manufacturers to analyze the project installation and application environment data, predictable events and put forward preventive and solving measures, and then make a comprehensive assessment of the whole project plan;
4, different LED production process, screen assembly process, installation technology experience, will directly affect the entire project duration, cost, safety performance, display effect and quality, service life and maintenance costs, so beforehand must be from the manufacturer or multi-faceted understanding, comparison of the product and the project in all aspects of the performance characteristics, to select the most suitable for their own needs of the program;
5, to understand the manufacturer's strength, integrity, service content and quality, these are the project can be a good and long-term cooperation basis and guarantee.
Clearly to consume, easy to use, I wish every need to use the big screen customers, can buy a product that they are satisfied with, I also wish the big screen display industry in the user's continuous demand, to go bad and save the best, to achieve a higher level of quality.