소개
For an event organizer, choosing to use a rental LED display screen is not as simple as choosing a suitable screen; it also needs to consider the power demand of the screen.
Insufficient power supply or improper planning may cause the screen to not display normally and even affect the smooth progress of the entire event. Therefore, how much power should be allocated to the rental LED display screen when holding an event becomes a problem.
1. Basic knowledge of the power demand of LED display screen
1). 전력 소비 characteristics of LED display screen
The power consumption of LED display screens, to put it bluntly, is how much power it consumes. This power consumption is mainly composed of two parts: LED lamp beads and drive circuits.
- LED lamp bead energy consumption:
This is the big head. The brighter the lamp bead, the more power it consumes. For example, for a large outdoor screen, in order to be able to see clearly during the day, the lamp bead must be particularly bright, and the power consumption will be greater. For a small indoor screen, the environment is dark, the lamp bead does not need to be so bright, and the power consumption is less.
- Drive circuit energy consumption:
Although this part consumes less power, it cannot be ignored. It must provide a stable current and voltage to the lamp bead to allow the lamp bead to work normally.
1.1). What are the factors that affect power consumption?
화면 명도: The higher the brightness, the more power it consumes. Outdoor screens need to be bright to be seen clearly, so they consume more power. Indoor screens are darker and consume less power.
해결: The higher the resolution, the more pixels there are on the screen, and the more lamp beads there are, so the power consumption will naturally be higher.
재생률: The higher the refresh rate, the faster the screen updates and the more power it consumes.
2. How do we evaluate the power conditions of the event venue?
1). Evaluation of the power capacity of the venue
To hold an event, the power must keep up. Otherwise, the equipment will not work, which would be embarrassing. Therefore, you must first understand the power details of the venue to see if it can meet your needs.
1.1). Total power capacity:
Ask the venue manager: First, you have to talk to the venue manager and ask them what the total power capacity of the venue is. This capacity is generally calculated in kilowatts (kW) or kilovolt-amperes (kVA), which determines how much electricity we can use at this venue.
Calculate your needs: Then, you have to calculate how much electricity we need for our event. List all the equipment you will use and see how much power they have. Add them up to get your total demand. Remember to leave some room; don’t calculate it just right, just in case something unexpected happens.
1.2). Number of available circuits:
- Count the sockets and distribution boxes:
Next, you have to see how many sockets and distribution boxes there are in the venue. These are your circuits. Make sure they are enough, and the layout is reasonable so that the equipment is not piled up together and there are not enough sockets.
- See if the circuit can withstand:
You also have to see how much power each circuit can withstand. Although some circuits look strong, they can’t withstand equipment with too much power. Therefore, you have to compare the power of the equipment with the power that the circuit can withstand to ensure that it will not be overloaded.
1.3). Other things to consider:
Is the voltage stable? Only when the voltage is stable can the equipment work normally. Therefore, you need to use a voltmeter to measure and make sure the voltage is within the normal range.
Is grounding good? Grounding is also very important; it can make the equipment safer. You need to check whether the grounding wire is connected firmly and whether the grounding resistance is large.
2). Backup power supply plan
What if the venue does not have enough power or there is a sudden power outage? Therefore, you need to have a backup power supply plan.
2.1). Generator:
- Choose a suitable generator:
First, you need to choose a generator with sufficient power. Generally speaking, it is safer to choose a power that is 20% larger than the actual demand. In this way, even if there is a little accident, the generator can cope with it.
- Install the generator:
The generator must be placed in a safe and ventilated place, not in a crowd, to avoid accidents. The cables must also be laid well to prevent people from tripping and being worn out.
- Prepare fuel and maintain it well:
Generators need fuel to generate electricity, so we must ensure that there is enough fuel. The generator must also be maintained regularly to keep it in good condition.
2.2). UPS power supply:
- Benefits of UPS power supply:
UPS power supply is like insurance. In case of a power outage, it can be connected immediately to allow the equipment to continue working. It can also stabilize voltage and frequency to protect equipment from power fluctuations.
Moreover, renting a UPS power supply is much more cost-effective than buying one, especially suitable for temporary activities or large-scale activities.
- Make good use of UPS power supply:
You need to choose a UPS power supply of appropriate capacity according to the power and number of equipment. Before the event starts, you have to try whether the UPS power supply is easy to use and make sure it can be used at a critical moment.
2.3). Other backup power supply solutions:
- Solar power generation:
If the site conditions permit, you can also consider using solar power generation. However, the power and stability of solar power generation may be affected by the weather, so you have to test it in advance.
- External mains power:
If the site power is really insufficient and the generator and UPS power supply can’t support it, then you can also consider connecting to the mains power from other nearby power supply points. However, this must be approved and supported by the local power department; otherwise, it will be illegal.
In general, when evaluating the power conditions of the event venue, you have to consider it comprehensively and don’t miss any links. At the same time, you have to develop a complete backup power supply plan to ensure that the event can proceed smoothly. In this way, we can hold the event with confidence!
3. Calculation method of power demand of LED display screen
When you are going to use an LED display screen in an event, it is crucial to accurately calculate its power demand. This not only ensures the smooth progress of the event but also avoids the safety hazards caused by power overload. Next, let’s talk about how to calculate the power demand of LED display screens.
1). Power consumption estimation formula
To estimate the power consumption of LED display screens, you need to use a basic formula. This formula takes into account key factors such as power density and screen size, helping us quickly derive the approximate power demand.
1.1). Basic formula:
P (total power consumption) = A (screen size, unit: square meters) × W (power density, unit: watts/square meter) + C (other losses, such as control system, cooling system, and other additional power consumption)
- A (screen size):
This is easy to understand; it is the area of the LED display screen. The larger the area, the more power is required.
- W (power density):
This refers to the power consumed by the LED display screen per square meter. The size of the power density depends on factors such as the brightness of the LED lamp beads, the refresh rate, and the efficiency of the driving circuit.
Generally speaking, the higher the brightness and the faster the refresh rate, the greater the power density.
- C (other losses):
In addition to the power consumption of the LED lamp beads themselves, there is some additional power consumption, such as the power consumption of the control system and the power consumption of the cooling system.
Although these power consumptions are not large, they cannot be ignored when calculating the total power consumption.
2). Case analysis
The formula alone is not enough; we have to use a specific case to demonstrate how to use this formula to calculate the power demand of the LED display.
2.1). Case:
Suppose we want to use a P4 full-color LED display in an outdoor event, the screen size is 10 square meters, the brightness requirement is 6000 nits (because the outdoor light is strong, so a higher brightness is required), and the refresh rate requirement is 3840Hz (a high refresh rate can make the picture smoother).
In addition, we have to consider the power consumption of the control system and the power consumption of the cooling system, which adds up to about 500 watts.
2.2). Calculation steps:
- Find the power density:
For the P4 full-color LED display, at 6000 nits brightness and 3840Hz refresh rate, the power density is about 500 watts/square meter (this value may vary depending on different manufacturers and models, and the specific value needs to be consulted in the product manual or the manufacturer).
- Calculate total power consumption:
Use the above formula: P = A × W + C
Substitute the values: P = 10 × 500 + 500 = 5500 watts
So, the total power consumption of this 10 square meter P4 full-color LED display at 6000 nits brightness and 3840Hz refresh rate is about 5500 watts.
4. LED display power distribution and wiring scheme
Speaking of LED display power distribution and wiring, this is really a “big project,” just like you are planning a large event!
1). Power distribution principle
First of all, you have to understand that the LED display is not a “power-saving little guy.” When it lights up, it consumes a lot of electricity. Therefore, we have to distribute power to it reasonably, just like distributing candy to a group of children, neither too much nor too little.
1.1). Distribution on demand:
We have to calculate how much power the LED display actually needs. This includes the power consumption of the screen itself, as well as the power consumption of “gadgets” such as the control system and the cooling system.
After the calculation, we have to find a suitable power supply equipment, such as a power cabinet or a distribution box, to ensure that its capacity is large enough to meet the needs of the display.
Just like when we choose a restaurant, we have to see if the restaurant has enough seats for our group of people. The same is true for power supply equipment; we have to ensure that its “seats” (that is, capacity) are enough.
1.2). Balanced load:
When distributing power, you also have to try to be “fair”. You can’t let a certain power supply device be too tired while other devices are idle. This is just like when we work; we can’t always let one person do it; we have to take turns.
You can divide the display into several areas, and each area is powered separately. In this way, each power supply device can be reasonably used, and the possibility of failure can be reduced.
1.3). Reserve margin:
When allocating power, you have to leave some room. Just like when we go out for a trip, we always bring more money and clothes, just in case.
For LED display screens, you also have to reserve a certain power margin. In this way, even if there are some unexpected situations, such as a power supply device being broken or you wanting to expand the capacity in the future, you can deal with it easily.
2). Wiring plan planning
Next, we have to talk about the wiring plan. It’s like you plan a travel route; you have to consider which road is the fastest and safest.
2.1). Choose the right cable specifications:
The cable is like the “road” when we travel. The road must be wide and flat so that the car can run fast. The same is true for cables. The specifications must be appropriate to withstand the current passing through.
For high-power LED display screens, you should choose copper core cables because copper has good conductivity and can reduce line loss. Just like we choose a highway, we must choose a wide and flat one.
2.2). Plan the wiring path:
The wiring path is like the specific route we travel. You have to choose a short and straight route to reduce the distance and time. The same is true for cables. The path should be short and straight to reduce the length and number of bends of the line.
At the same time, we have to avoid those “dangerous areas,” such as mechanical passages, near heat sources, etc., just like we have to avoid war-torn areas or places where natural disasters frequently occur when we travel.
2.3). Wiring method:
The wiring method is like the “hook” you use to connect the two carriages. The hook must be firm and reliable so that the carriages can be connected steadily. The same is true for cables. The wiring method must be firm and reliable to ensure that the connection between the cable and the power supply equipment is tight and not loose.
For high-power wiring points, you also have to use crimping or welding. This is like using strong glue or solder to fix things, which is more firm and reliable.
3). Safety measures
Finally, we have to talk about safety measures. This is like the insurance we buy when we travel. Although we hope that we will not use it, we can have a guarantee in case of an accident.
3.1). Grounding protection:
All metal casings and conductive parts must be reliably grounded. This is like hiding under a tree (of course, this is actually unsafe, this is just an analogy) or in a building during a thunderstorm to prevent being struck by lightning. For LED display screens, grounding protection is also essential.
The cross-sectional area of the grounding wire must meet the specified requirements and ensure that the grounding resistance is less than the specified value. This is like choosing a fuse; you have to choose the appropriate specifications and models.
3.2). Lightning protection:
In areas prone to lightning, you must also install lightning protection equipment on the power line. This is like you need to bring an umbrella or raincoat when traveling to prevent being wet by rain. For LED display screens, lightning protection equipment is like a “big umbrella” that can protect the display screen and power supply equipment from damage.
Lightning protection equipment can absorb lightning overvoltage, just like an umbrella can block rain. In this way, we can ensure that the LED display can work normally in thunderstorms!
5. Adjustment of the power demand of LED display in special circumstances
As an indispensable visual display tool in modern activities, the management and adjustment of power demand of LED displays is particularly important, especially in special circumstances. Below, we will explore the adjustment strategy of the power demand of LED displays from two aspects: weather factors and changes in activity content.
1). Weather factors:
Weather, a seemingly uncontrollable factor, actually has a significant impact on the power consumption of LED displays. High temperature and low temperature, these two extreme weather conditions, will make the “appetite” of the display different.
1.1). Impact and adjustment measures of high-temperature weather:
- 영향 분석:
The high temperature will decrease the luminous efficiency of LED lamp beads. In order to maintain the same brightness, the display needs to consume more electricity.
High temperatures may also accelerate the aging of electronic components and increase the risk of failure, thereby indirectly increasing the demand for power maintenance.
- Adjustment measures:
The brightness of the display can be appropriately reduced to reduce power consumption and extend the life of the equipment.
Strengthen the cooling system, such as increasing the number of fans or turning on the air conditioner to ensure that the display screen works at a suitable temperature.
Check the equipment regularly to promptly discover and deal with potential problems caused by high temperatures.
1.2). Impact of low-temperature weather and adjustment measures:
- 영향 분석:
Although low temperature has little effect on the luminous efficiency of LED lamp beads, it may cause the display screen to start up slowly or even fail to work properly.
In a low-temperature environment, the performance of cables and connectors may also be affected, increasing the loss of power transmission.
- Adjustment measures:
In a low-temperature environment, the display screen can be turned on in advance for preheating to ensure its normal operation.
Use cables and connectors with better cold resistance to reduce power transmission loss.
For outdoor display screens, consider installing insulation facilities such as awnings or insulation covers to reduce the impact of low temperatures on the equipment.
2). Changes in activity content:
Changes in activity content often mean that the LED display screen needs to display different pictures and information, which will also affect power demand.
2.1). Impact and response plans for increasing interactive links:
Interactive links usually require the display screen to respond to the audience’s input in real-time, which may increase the burden on the processor and thus increase power consumption.
The interactive session may also require additional equipment support, such as touch screens, cameras, etc., which will also increase power demand.
- 대책:
When designing the interactive session, take full account of the power demand and arrange the brightness of the display and the workload of the processor reasonably.
Prepare additional power supply equipment in advance to ensure that it can be quickly connected at the beginning of the interactive session to meet the power demand.
2.2). Impact and countermeasures of adjusting the screen layout:
Adjusting the screen layout may change the power distribution of the display, and the power demand in some areas may increase while other areas may decrease.
If the screen layout changes significantly, it may also be necessary to rearrange the power lines and connectors, increasing the complexity of power management.
- 대책:
Before adjusting the screen layout, carry out detailed power planning to ensure that the power demand of each area can be met.
Prepare the required power lines and connectors in advance to ensure that the power access can be completed quickly when the layout is adjusted.
Strengthen communication with event organizers to keep abreast of changes in the screen layout so as to make corresponding power adjustments.
결론
Through the explanation in this article, we have a deep understanding of the relevant knowledge of the power demand of the rental LED display used for events.
We discussed everything from the power consumption characteristics of LED displays to the power condition assessment of event venues to the calculation method of power demand and power distribution and wiring solutions.
Finally, if you want to learn more about LED displays, 문의하시기 바랍니다.
