How to choose a suitable LED display for your project?

As a supplier of LED display, we sometimes get some incredible inquiries - I need indoor led screens with 3000nits. When we told him that the indoor led screen with 800-1200nits is enough, otherwise too high brightness will cause harm to human eyes. But some customers think that the higher brightness, the better. Today we will analyze the professional knowledge of LED screens.

1. Indoor or outdoor use & brightness requirement or environment brightness level?

1>For outdoor use:

A: if facing the sun, the brightness should be more than 8000 nits, if lower than 8000 nits then the people will not see a clear image when it is in the noontime, mostly from 11 AM-3 PM.

B: if not facing the sun(back on to the sun), the brightness should be more than 5500 nits, if lower than 5500 nits then the people will not see a clear image too during the daytime.

C: So if your screen is facing the sun then you should be very careful about choosing the correct model and reliable supplier for you since most factories LED displays can only reach around 5500-7500 nits brightness. this is not very enough for your outdoor application.

D:Brightness depressing rate: for a long term using consideration, the outdoor LED display's brightness depressing should be as slow as possible, if not, then the outdoor LED display cannot use for even 2 years then the brightness lowering to 3000 nits level and cannot make use any longer. For a good quality LED display, it should be using more than 5 years with no much brightness depressing(maintain 80% of the original highest brightness level), this is very important esp for some very important big project since for the big project it is very hard to make the replacement. so when your project is very huge you should be more cautious about how to choose your LED display.

E: Chip size is also an important factor for the brightness, lifetime & quality of the outdoor LED display. For Nichia, the chip size is very small 7-9mill but still can achieve more than 12000nits brightness for outdoor LED display models(eg.P10mm, P12mm,14mm,16mm & 20mm). But for other chip brands, it is very hard and almost impossible. For other LED chip brands, the bigger the LED chip size the higher the brightness it can achieve & can ensure a longer lifetime for the LED chip. actually the LED chip size should be more than 13 mills for green & blue LED chip,12 mills for red LED chip.

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2>For indoor use:

A: Normally the brightness should be more than 800 nits if lower than 800 nits then the people will not see a clear image when it is more than 50 meters far away from the LED screen.

B: If the inside environment has very bright lighting, the brightness should be more than 1200 nits, if lower than 1200 nits then the people will not see a clear image again.

C:For the indoor models: from P4mm,P5mm,P6mm,P7.62mm to P10mm,only P4-P7.62mm can reach more than 2000 nits brightness, for P10mm & P12mm, the brightness is only around 1500nits. So when you make the finalization for which model to buy, you need to know clearly which kind of brightness environment you will have.

3>For semi-outdoor use:

A: Normally semi-outdoor LED display refers to the LED display when it is using in the hall of the bus station, train station, airport, basketball perimeter, football stadium perimeter, etc.

B: The brightness requirements for the above application is around 4000 nits.

C: The most common use solution for this semi-outdoor application is by using outdoor models, like P16, P20, P12, or P10mm.

The difference with the outdoor use is:

No need for the rubber pouring on the surface of the module. The screen work method is normally not static, like for P16, the screen work method is scanning 1/4, for P20, the screen work method is scan 1/2. The reason is that for semi-outdoor use, it is no need to be waterproof any longer and the brightness requirement is a little lower than the outdoor model since no direct sunshine environment.

4>Another point on how to choose the correct model of the LED display is that when it is outdoor use

But did not give a specific requirement for the brightness, then there will be many optional solutions, and between these solutions, there will be some solution which is not a good solution for the project’s real need. Like if your required model is 12SQM P16mm outdoor full color LED display, the default professional solution should be a P16mm outdoor full color LED display work method should be static 1/1. But if you are not very professional in this field, then it will be very hard for you to make the difference between static display and scan 1/4 display. In order to save the cost and offer a very very low attractive price, many companies offer the scanning 1/4 screen work method as the static display.

But when you really use it: firstly the brightness is much lower than the static display; secondly the lifetime will be much shorter than the static display. 

2. Application:

1>single color, double color for text show?

2> full color for video display for video and photos showing?

3>if the LED display is mainly used for commercial advertising, then you can only choose full color LED video display. And the most common use outdoor full color LED display is P16&P20mm 2R1G1B outdoor full color LED display when the size is more than 12SQM. When the size is less than 12 SQM, then the most common use model is P12mm & P10mm outdoor full color LED display.

4>If the LED display is only for the text, letters, simple logos’ showing, then the most common use model will be P10mm 1R single red color LED display & P20 2R1G tri-color LED display. But if it is for the long-distance text showing, then P25 & P31.25mm 4R or 4R2G LED display will also be a practical and high cost-effective solution.

3. Size (pls inform me of the width and height ):

1)The dimension of the LED display you need

2)if we can adjust the size a little in order to fit for 4:3 & 16:9 ratio.

3)for a good quality full color LED video display, the whole resolution of the LED display should be more than 60,000nits. that means for each model it has the smallest size requirements.

4. Installation way:

1> on the top of the wall

2> embed into the wall

3> whole screen hanging on the ceiling of the floor

4> standing on the single pillar

5> standing on the two pillars

6> Different installation requires different requirements for the LED display’s cabinet standard, servicing method, etc.

5.Rental use or for fixed installation application:

A: If for rental use: do you need flight case, lock button & hanging structure, and an industrial use IPC?

The flight case is a special packing case for the rental LED display, it has 4-6 wheels and 8 handles which is very convenient for transportation and moving.

B: Lock button: 1> Lock button is mainly for rental use: the advantage of the lock button is that it can make the cabinet assemble be faster and make the cabinet connection be more tight and flat than the normal standard LED display cabinet. 2> The lock button also widely used when it is for football stadium perimeter display, basketball stadium perimeter display, mobile truck 7 mobile trailer LED display, etc.

C: Hanging structure: the hanging structure is something that is only for rental LED display use. It was composed by suspender & crossbeam & the swinging ring, to help you make a better and fast understanding

D: IPC is industrial Personal Computer that can use continuously for 2 years with no any stop, LED display uses IPC is a special IPC which is only 25mm thickness and can install inside the LED display cabinet. The name of it is LED6689.

E: Hanging shelf of the rental LED display: Hanging shelf of the rental LED display is composed of 8 cross girders & 4 pillars, normally it is made of aluminum alloy material.

6. View distance:

1> Best viewing distance refers to the distance from the LED display, where the people can see a whole and clear picture of the image on the LED display.

2> There are 2 ways to calculate the best viewing distance: one is by the pixel pitch, one is by the diagonal. There’s also the reason why there’s different viewing distance for the same model LED display, also different viewing distance for the same size LED display.

3> What is Minimum viewing distance, Max viewing distance & Most common use viewing distance (the place where your most populated audience comes from)?

4> The Max viewing distance depends on the LED screen’s whole size, the most common use max viewing distance method is 30*diagonal line of the LED screen.

7. Communication distance: what’s the distance between the controlling computer and the screen?

1>Normally the controlling distance between the controlling PC & the LED screen is less than 100 meters.

2>If the controlling distance is more than 100 meters, then the common CAT5 data cable will not be enough. Fiber will be the best solution in this case.

8.Cabinet material:

1.iron or aluminum cabinet. The aluminum cabinet is 150 USD/SQM higher than the common iron cabinet. Weight: 70kg/sqm for iron cabinet 50 kg/sqm for aluminum cabinet.

If the LED display screen is for rental use, then aluminum cabinet will be better since the light and easy to be transported and assembled.

9.Cabinet standard: Do you need a waterproof cabinet with the backdoor? or only a simple cabinet without a backdoor?

1>If embed into the wall or the screen is used inside the building, then you don't need the backdoor.

2>If the LED screen is used outside of the building or you need a very good dustproof ability, then you need the backdoor & dusty proof veil for protecting the electronic components from high humidity & rusty.

10. What's the difference between the synchronous control system & the asynchronous control system? How to choose the corresponding control system for my LED display screen system?

1> Synchronous & asynchronous refers to the controlling PC working together with the LED display or not. Synchronous means when the LED display screen system is working, the controlling PC must open and cannot be closed. Also means the LED display and the controlling PC will be working synchronously together.

2> Asynchronous control system means when the LED display is working, the controlling PC can be closed and has no further relationship with the LED display, the LED display can work independently after the basic set up and the program making.

3> Product model, controlling distance & application is the main factors. One more point is that the synchronous control the system always has a much better viewing effect and more powerful function.

15. What is a static LED display? what is a scanning LED display? what's the difference and which is better? How to choose the best scanning model for my LED display screen system?

1. The static and scanning display is the only 2 models currently. The static display used for P14-31.25mm, when pixel pitch is smaller than 14mm, the main working method is scanning: like the P12mm is scanning 1/2 & the P10mm is scanning 1/4. The model and the corresponding scanning method depends on the pixel density & brightness. 

16. What is a multi-function card?

1> Multi-function card can help the LED display screen system achieve many functions, such as automatic False Alarms, fire & smoke alarms, brightness adjustment, etc

2>Nowadays Multi-function card is mainly used for outdoor LED display screen’s brightness control: Brightness control is needed,esp for outdoor LED video display screen since the outside environment brightness level is changing during the daytime. If you don’t adjust the brightness according to the environment, then LED display screen system will not have a perfect viewing effect: in the morning and afternoon, the LED display will be too bright in the morning and harmful to people’s eyes.

3> There are two ways to achieve brightness control: manually changing & automatic changing. The automatic brightness changing can adjust the LED display screen system’s brightness perfectly according to the environment brightness level. 

17. Packing: wooden case or flight case or paper carton?

1>Flight case is used for rental use, it is tougher than the wooden case and the paper carton. it has 4 wheels and has 8 handles to make the transportation be very convenient and can protect the LED display better. The cost is higher than the wooden case.

2>wooden case is for one time using, after unpacking, it cannot use any longer. For the fixed installation LED display system, wooden case packing is the only way and the best way for packing since the low cost and almost same safety level for one-time use.

If your LED display screen system is for the rental use, please choose the flight case packing for your LED display screen.

3>Paper carton packing is only for domestic transportation and air freight using.