LED Panel Purchasing Guidance

What need to be considered when deciding the size of the display?
1) What is the minimum watching distance and then decide the size of the display according to the actual space.
2) Pixel pitch and resolution
3) The space for installation and maintainence
4) The angle from the led display to the ground
What content do you want to show?
1) TEXT. Based on the size of the text and the resolution need.
2) Normal video.320 x 240 dot matrix
3) Number standard DVD display: ?40 x 480 dot matrix
4) Complete computer video: ?00 x 600 dot matrix
What are the requirements for the led display brightness according to the Environmental brightness?
General requirement for the brightness are as follows:
1) Indoor:>800CD/M2
2) Semi indoor: >2000CD/M2
3) Outdoor( facing North):>4000 CD/M2
4) Outdoor( facing south):>8000CD/M2
Requirement for the brightness of RED, GREEN and BLUE when show white:RED, GREEN, BULE plays different role when showing white. The fundamental reason is due to the human eye retina has different feeling for different wavelengths of light. After a large number of experiments and rest, we come to the following ratio for the reference: Simple red-green-blue light ratio: RGB 3:6:1 accurate brightness ratio: 3.0:5.9:1.1
Why the high quality led display requires pure green led?
In the production of the led screen, we should use the trichromatic LED lamp with high lunimous efficiency and rich color. So that in the chromaticity diagram of color in the triangle area and near the tongue as far as possible in the color spectrum curve, to meet the needs of rich color and the issue of sufficient brightness and the tongue-shaped curve for the 515nm wavelength of light best, so high-end LED display selected wavelength close to 515nm pure green LED light pipes, such as the choice of 520nm, 525nm or 530nm wavelength LED light tube.
Why choose DVI graphics card standard interface?
1）international standards for the computer interface
2) No need to open the chassis, can be easily installed;
3) High-memory and strong dynamic screen display capability
4) Good compatibility of hardware and software
5) Supports all operating systems and application software
6) High-volume production, low cost, easy maintenance.
Can the display be controlled with Laptop?
no, Laptop ¡s graphics card is built-in, there is no DVI port, can not be achieved in connection with the control system.
What are the differences of NICHIA chip and othe domestic led chip except price?
1) Chip: Nichia company produce their chip independedtly while the domestic company always use the chips from America or Taiwan.
2) Packaging: Nichia company packaging independently, no branch factory in China.But for the domestic chip, there are many factories do the packaging.
3) Consistency: for the Nichia led in one lot, the wavelength has little difference, But for the domestic led, consistency is relatively poor
4) Life span: Nichia led has relarively longer life span, Domestic led attenuate faster.
Indoor full-color module and SMD full-color display, What is the difference?
1) light-emitting parts: the module full color screen display is generally green, the price of pure green module is higher; SMD generally use pure green chip;
2) image quality: full-color pixel module looks rough, low brightness and there always mosaic;SMD full color led panel has better consistency and higher brightness;
3) maintenance: full-color module is not easy to maintain. The cost of replacing the entire module is high; the SMD full-color module is easy to maintain, maintenance can be carried out by replacing a single lamp;
Can the SMD3528 used for outdoor display? Why?
No. Outdoor screen has high demand of installation and structure, SMD3528 LED unable to adapt to the harsh outdoor environment; at present SMD display can not to meet brightness requirements of  outdoor display

Why it takes longer time to produce outdoor display?
1) procurement of raw materials: purchasing the led takes long time, specially when you have to import , it takes even longer time.
2) the complexity of production process: subject to PCB design, production casing, irrigation plastic, tune white balance, etc.;
3) the structure of demanding: the general design for the box, need to consider wind, rain, lightning and so on.
How to help customers choosing the right display?
1) what need to be shown?
2) viewing distance and viewing angle
3) resolution requirement
4) requirement of environment
5) cost control
What is the genaral ratio of width and hight for the display?
Picture and text: subject to what you want to show.
Video display: normmaly it is 4:3 or near this proportion. Ideal proportion is 16:9
How many pixels can one control system control?
Communications screen Card A: single color, dual color 1024 x 64
Communications screen Card B: single color: 896x512, two color;896x 256
DVI dual color display:12801x768. DVI full color led display: 1024x512
what are the factors to consider when design the size of the screen?
when design the size of the display, there are 3 factors very important.
1) the needs of displaying content
2) space limitation
3) according to the module size and resolution
More than 10 kilowatts buck should start screen equipment.
Communication requirements: communication distance is long for the definition of communication.
To be installed to display the type of communication lines used by the length of the standard to install communications lines.
The prohibition of communication lines and power lines in the same pipe line alignment.
Installation requirements: about the level of the installation screen does not allow backward - to the installation of lifting up and down adjustment rod - wall to be installed before installing forward off hook - landing position to increase support for the installation of bolts.

Indicators display power consumption and power requirements of what?
Screen is divided into the average power consumption of the power consumption and maximum power consumption. Also known as the work of the average power consumption is usually the actual power consumption. Power consumption is the largest start-or full-bright at the time of extreme circumstances, such as power consumption, maximum power is AC power supply (wire, switches, etc.) must take into account the elements. Average power consumption is generally the largest power of 1/3. Display is a large-scale
precision electronic equipment, safe use and reliable to work, its power supply input AC220V or AC220V power supply connected to the computer ¡s input must be grounded. Note: The computer ¡s power supply input AC220V grounding terminal connected with the computer chassis.
Display of the installation requirements?
Power requirements: power supply wiring should be in the body size of the screen 220V electricity power supply, FireWire grounding line 0 line; 380V electricity supply, the three 10-line ground line of fire line; the front lines with the 0-line the same wire cross-sectional area; more than 10 kilowatts buck should start screen equipment. Communication requirements: communication distance is long for the definition of communication. Installed to display the type of communication lines used by the length of the standard to install communications lines. Prohibition of communication lines and power lines in the same pipe line alignment.
Installation requirements: about the level of the installation screen, do not allow the dumping after the lifting rod to regulate the installation of up and down before the installation of wall mounted hook falling forward landing position to increase support for the installation of bolts.
What issues should be considered for outdoor screen design and installation ?
The main issues of outdoor screens are as follows:
1) Screen installed in the outdoor sun and rain often, the wind dust cover, the work environment. Electronic equipment to be wet or damp can cause serious short-circuit or even fire, and even lead to failure of fire, resulting in losses;
2) Screen may be caused by strong electric lightning attack Magnetic;
3) Significant changes in ambient temperature. Display the work itself should have a certain amount of heat, if the ambient temperature and the heat is too high and non-performing, integrated circuits may not work correctly, and even burned down, so that shows that the system does not work;
4) Wide audience, require line-of-sight distance requirements of wide field of vision; ambient light changes, in particular, may be subject to direct sunlight.
The special requirements of the above, outdoor display must be:
1) Screen body and the screen body and architecture must be strictly waterproof junction leakage; screen body in order to provide good drainage measures, in the event of a smooth water emissions; (2) and building on the screen to install lightning protection devices. The main screen and the casing to maintain a good grounding, grounding resistance is less than 3 ohms, so that high current caused by lightning discharge in time;
3) The installation of ventilation to cool the screen so that the internal body temperature of -10 ? ~ 40 ?between. Screen behind the body above the axial fan is installed, from the heat;
4) Choice of working temperature -40 ? ~ 80 ?industrial level integrated circuit chip, the temperature is too low to prevent the winter so that the screen could not be activated. ;
5) In order to ensure a strong ambient light in the case of remote visualization, we must choose ultra-high brightness light-emitting diodes;
6) Shows that the new optional wide angle medium tube, wide angle, color pure, consistent coordination, more than 100,000 hours life. Show that the outer packaging for the media the most popular along with over a square cylinder, silicone sealed, non-metal assembly; its refined aesthetic appearance, sturdiness and durability, with the anti-direct sunlight, dust-proof, waterproof, anti-high temperature, anti-short-circuit the "Five Anti" feature.

Write by Sally/Sales manger ERALED | may 18, 2010

A letter to my old and new customer

Hi,my dear friend
Before I got to work in  LED sign factory, i felt these big TVs is magic but no way i can understand how it work, but since i have been working in this more and more professionally, i found out it's not that hard as i thought, and i started to love these Magic "TV" boards, and i hope to share i learn and know about these magic little red/blue/green balls will also help people who are interested in the same...
1>”please give a price offer for this product + shipping costs by port/flight  
every time I smile when i see this, because i know that i will have to explain a lot to them about the price for this product + shipping costs by port/flight "
2> first of all i hope clients will understand , the LED display have many didferent series with different prices:
outdoor/ indoor/
full color/ dual color/ single color/
DIP technology / SMD technology
LED display with special require disign...
Specifications; PH10/ PH12/PH16/PH18/PH20/...
they are got different price, so first of all i would have to know what do the client's project  require for the LED display , and then work out the best solution and the most reasonable price for the whole project...
3>for doing this, i would at least know info from you as below:
   1) size of the LED screen which you are intrested in
   2)where are you going to install the screen? ( outdoor /indoor?/ and where? on the wall or on the ceiling ?..or on the street?  would be great if you can offer me pictures for my reference. so i will be more clear about your needs and get the best solution)
   3) viewing distance : what is the viewing distance  do you want to get for your LED display ) distance from the screen to people who will see the screen) , because base on that, i will know what specification of the LED signwill suit your need the best ( PH10 /PH12/PH20 ...whatever" with this specification series, you should understand that the smaller the pixel distance is, the more expensive the price will be, let's make a expample for you: PH10 full color is more expensive than PH12 (10 is smaller than 12...) does it mean sence?
  PH10: will see clear from 10 m from the screen
  PH12: will see clear view from 12 M distance from the screen
  ....4) what info are you going to display on the screen? (simple images?/ movies?/ ADs ?/...) I need to know this for pick up the right specification for you, because it does mean the most expensive products and specification is the best, important is you got the right one which is good for your projects need..
  5) does the screen will require to face camera and photo shooting? please let me know about this bacause i will help me do better job to choose the right controlling system which fits your projects
4>PACKING PRICE
There are two kind of packing :
1) wooden case packing ....45USD/SQM
2) Flight case packing----150 USD/SQM
Suggestion for clients
1) if the LED billboard is going to use for rental, will be movied and installed in different places in no time, then please better use flight case, it's strong and easy to move place to place
 2) if not for the 1) using, then ply wooden case is fine, it's cheaper and safe too
 5>SHIPPING
1) If the time is not that urgent, i suggest clients to take shipping by sea, cheaper and also the screen will be more safe
 2) by Flight is very expensive for this producs as it's very heavy and big...
I work in Shenzhen ERALED  company as a project manager in oversea department.willing to offer you the top quality LED billboard with the best price and service, Please kindly let me know if you have any question
if you have any question about what I post on this site:
my email :sally@eraled.biz
cell: 86 13076900439
please feel free to contact me if you have any new idea about creating and developing this products.
And you are welcome to contact me anytime if  you have any questions.
Best  wishes   for  you

Yours  sally

Write by Sally/Sales manger ERALED | May 18, 2010

Another letter to my customer

Hi,my dear  friend

1> When you find this letter,pls do not take this as a rubbish.
2>I'm going to receive your inquiry,before  this,I  hope  you  can believe  me.
I will sent so many information  about  our  company  for  your  reference.
I  think you  must very appreciate me after  this.
Then,I hope you can tell me the detail size  you need,then I can make  the  detail  quotation  to  you.
3>The market of  LED is a very competitive market now.because the old advertisement has not completely replaced.But will be replaced in the future.
so Led is  a new industry.To other electronic products,LED is  like  baby,need  develop.
that  why  we  need  cooperation  with  you.
4>You can be our partners,open the local market  of  yours.and  we can be you strong backing.Give you good products of quality and  the  best  price.
5>regard  our  company,pls rest assured.we believe  that  the  quality  is  the soul  of  an  enterprise.therefore,we  always  put  quality  as  the first consideration.the production line fully  automatic.all products  have  to  pass strict inspection before they go  out.The product gives us an edge  over  our competitors.I am sure.
we are  thinking of  expanding into  the international market.So,we  need  many partners  from all  over  the  world.
Your  desire  is  coincides  with ours,so  come  on.try  our  best.to  be  number  one.
6>If you  have  some  requirment  or  something  need  my help,pls tell  me  for  free.
i will be 100% be your support on quality, service and good price.
I  always  don't  think   the  price  is  a  problem  of  us,we  can  get  well  cooperation   with  each  other,pls  believe  me.
7>my  dear  friend,one  person  tell me, make  the  customer   as  a  friend,I  always  try   my  best   to  reach  this  requirment,
So,I  just  think  I  can do something  for you  in this  field.
just ask  me  some  queation  or some  requirment you  want to know.this  is  a  strong support  for  me.
8>I  will  do  my  best   to  reach   you  requirment.
I  promise   you,I  am  a  good  girl   and  I  can   do  the  best.
pls  tell  me  your  opinion,looking   forward  your  reply.

 

Yours  sally

Write by Sally/Sales manger ERALED | May 19, 2010

Service and support

Service Process

1. Contact with our serving dept of ERALED.

2. Fill in the servicing documents: give us the detailed problem description and make a list of your problems, the ways you have already tried, and give us your ideas on this problem.

3. Choose the way you need for servicing: field service support or online support.

4. Arrange a corresponding after sale serving engineer to give you field service support or the online support

Blockquote

We can let circumstances rule us, or we can take charge and rule our lives from within.

- Earl Nightingale

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