APOLLOMI LED SCREEN FACTORY: APOLLOMI P5 indoor Square video AD led display sig...: APOLLOMI P5 indoor Square video AD led display sign HD P5 resolution led display 40000pixel/sqm 160x160mm led display resolution 48...
发帖者 Unknown 时间： 下午6:08
APOLLOMI P5 indoor Square video AD led display sign
HD P5 resolution led display 40000pixel/sqm
160x160mm led display resolution
480X480mm each side size led display
96X96pixelsl each side led display resolution
6 sides for a square for advertising led display
发帖者 Unknown 时间： 下午6:07
Indoor Best LED Display Price(/sqm=1*1meter size)
Outdoor Best LED Display Price
Outdoor Best LED Display Price
发帖者 Unknown 时间： 下午6:55
Ph5mm SMD outdoor full color led screen display model
40000pixel/sqm HD resolution
160*160mm led module size
32*32pixel led module
640*640mm standard led screen cabinet
Ph5mm SMD outdoor full color led screen module front
Ph5mm SMD outdoor full color led screen module back
Ph5mm SMD outdoor full color led screen module side
APOLLOMI outdoor full color led screen modules
P5 outdoor rental led display project
More Video please go to https://www.youtube.com/user/wwwapollomicom/videos
发帖者 Unknown 时间： 下午6:52
Ecrans geants LED Exterieurs Diode électroluminescente
Ecrans geants LED Exterieurs
Le numéro 1 mondial en écran géant LED a choisi pour la distribution et le suivi technique de ces produits en Chine.
Nos écrans geants video LED sont la référence mondiale equipant les installations les plus prestigieuses : New York Times Square , Picadilly Circus Londres , Las Végas ...des references dans plus de 100 pays.
Dotés de LED Nichia et de composants haut de gamme nos écrans sont développés pour offrir le meilleur rendu visuel.
La perenité de fonctionnement est garantie avec nos logiciels et systemes embarqués permettant de recalibrer les couleurs de votre écran afin qu'il conserve son homogeneité initiale.
Nos écrans sont garantis 5 ans contrat de maintenance inclus.
Structuré autour d'une équipe d'ingenieurs nous étudirons votre projet afin de vous offrir une solution sur mesure.
Une diode électroluminescente (DEL, en anglais : Light-Emitting Diode, LED), est un composant opto-électronique capable d’émettre de la lumière lorsqu’il est parcouru par un courant électrique. Une diode électroluminescente ne laisse passer le courant électrique que dans un seul sens (le sens passant, comme une diode classique, l'inverse étant le sens bloquant) et produit un rayonnement monochromatique ou polychromatique non cohérent à partir de la conversion d’énergie électrique lorsqu'un courant la traverse.
Elle compte plusieurs dérivées, principalement, l'OLED, l'AMOLED ou le FOLED (pour flexible oled). Les LED sont considérées, par beaucoup, comme une technologie d'avenir dans le domaine de l'éclairage général. En effet, on estime que d'ici 2020, les LED pourraient représenter 75 % du marché de l'éclairage1. Elles sont utilisées aussi dans la construction des écrans de télévision plats : pour le rétroéclairage des écrans à cristaux liquides, comme source d'illumination principale dans les télévisions à LED.
发帖者 Unknown 时间： 下午5:40
LED Display Maintenance Procedures
1. Control system
1) The entire screen is not bright or grid
Control of the host open whether or not
Communication line is plugged or not
Sending card has been plugged or not
The data line of multimedia card, capture card, sending card is connected well or not.
The switch position of JP1 or JP2 card is not ok?±,open the host
The communication line plugged well
To re-insert the sending card
Connect the lines well of the multi-media card, collection card, sending card.
Adjusting the JP1, JP2 switch location
The protection of a computer monitor is good or not or display screen is black or blue. (Synchronous Screen)
2) Every time when start LED control system is not able to find COM port to send data between the signal,the acquisition card line is not connected or the computer COM itself is defective. Connected to the data line or replace the computer
3) The whole screen shake or double image, " to check the data line between the computer and screen.
Check the DVI cable between multimedia card and sending card
"Sending card is defective"please reinsert or replace the signal cable, to reinforce the port of DVI cable, or replace the sending card.
2. Drive part
1) Module can not light
Horizontal direction of few modules do not light, check the normal and abnormal module cable connection is well or not.
Or 245 chip is ok or not.
Vertical direction of few modules do not light, check the power supply of this line is ok or not.
+5V or GND is supplied or not.
+5V or GND is short-circuit or not
2) The horizontal direction of modules or the corresponding module is not bright or abnormal display
To check the foot of corresponding module is pin-line signal leakage or welding, To check the signal on the line, the next is no welding or resistance welding leakage.
3) Two lines of one modules is bright at the same time(one of lines is normal, the other lines is bright all the time when display text.
Please check if corresponding two lines is short-circuit or not.
4) The first half or the second half , red or green do not light or do not display properly, it is lack of color for each module, please check 245 R.G B output is ok or not.
Check the normal output of 595 feet and abnormal 595 feet is passed or not
To see whether input feet is ok or GND, +5 V is short-circuit or not.
LED Display Screen FAQ and solution
1. Whole screen does not work (black screen)
(1) Check power supply
(2) Check signal connection (cat5,DVI cable) (synchronous screen)
(3) If synchronous screen, check the green led of sending card and receiving card whether it is twinkling or not.
(4) Check the monitor of PC whether it is protected as black,or screen display area is black or pure blue. (synchronous screen)
2.Whole LED module does not work(black module)
(1) Successive modules in horizontal do not work, please check the ribbon cable between the normal unit module and unnormal unit module whether it is connectted or not, or replace the first module from right side when facing the screen.
(2) Successive moudels in vertical do not work,please check the power supply of all the modules.
3.One row lamps of module does not work.
(1) Check this row whether connecting to output pin of 4953.
(2) Check 138 encoder.
(3) Check 4953.
(4) Check Vcc and GND of 4953.
(5) Check output of 74HC138 and 4953's controlling pin whether connectted or not.
4.Unit module doesn't work.
(1) Check 595 normal or not.
(2) Checking the up and down moudle corresponded common pin connect or not.
(3) Check 595 output pin to moudle pin connect or not.
5.One color lacked in half or whole LED panel.
(1) Check 245 R, G, B data output.
(2) Check normal 595 output pin and unmormal 595 input pin whether it is connectted well or not.
LED Module Malfunction and Solution
1. Phenomenon: the whole display is flickering.
Problem: signal poor connection.
Solution: re-fix or re-connect signal cable.
2. Phenomenon: dusky LED
Problem: The volage of switching power supply is unconsistent with LED voltage tag.
Solution: make sure the volage of swtiching power supply is consistent with LED. voltage tag.??
3. Phenomenon: partial LEDs do not work.
A. contact direction correct or not.
B. power output wiring correct or not.
C. power wire anti-inserted or connectted inversely.
A. re-connect in a correct way.
B. ensure the red wire connect the positive pole,black wire connect the negative pole.
C. check partial the wrong connection , re-connect.
4. Phenomenon: all LEDs do not work
A. no output of the switching power supply.
B. wrong power connection.
A.connect the power switch input and test.
B. check the positive and negative pole of the power supply whether it is right or not.
Introduction of LED display IP and way of testing
Introduction of IP and way of testing
Instruction of IP (Conform EN60529/IEC529)
Instruction of protection Level (according to EN60529/IEC529)
Protection level IP54, IP is the mark, number 5 is the first marking number, 4 is the second marking number, the first marking number means the contact potection level, the second mark number means the water proof level, contact protection and anti external force (first number) water-proof level(second number).
First number protection area
Second number protection area
0 no protection
1 protection from 50mm diameter and big thing. Diameter 50mm. No damage from the vertical dropping water
2 protection from 12.5mm diameter and big external thing. Diameter 12.5mm. No damage from the dropping water for an angle of 15 degree. No damage from the vertical droping water.
3 protection from 2.55mm diameter and big external thing. Diameter 2.5mm. No damage from the dropping water with angle 60 degree.
4 protection from 1.0mm diameter and big external thing. Diameter 1.0mm. No damage from the dropping water with any angle
5 Anti dust, impossible complete anti dust. But no damage to the equipment.
6 Anti dust, with an air compress of 20mpa, no dust can enter the cabinet. water pull from every angle can not cause any damage. No enter of the detector into the cabinet. Short time water proof when drank in the water.
8 Protection long time water drank. Water drank under certain condition. The volumn should not exceed a certain quantity which can cause a damage.
water proof test
Water proof test should include the second digit from 1 to 8, which protection level is 1P x 1 to IP x 8
2. Experiment content for protection of different level. (1)IPX1
Method: vertial vater dropping experiment.
Experiment equipment: water dropping experiment equipment and its experiment method. Please refer to 2.11.
Sample mounting: put it on the normal position on the rotating sample position(1r/min). the distance between the water dropping place and the sample top should not exceed 200mm.
Experiment condition: droping volume is 0.5 mm/minute
Lasting time: 10minutes (2)IPX2
Method: 15degree water dropping experiment
Experiment equipment: water dropping experiment equipment and its experiment method. Please refer to 2.11.
Sample mounting: put one side of a cabinet to be 15 degree vertically. The distance between the water dropping position and sample top should not exceed 200mm. Change one side after finished one side. Totally 4 times.
Test condition: water drop 0.5mm/min
Test time: 4 x 2.5minutes(total 10 minutes) (3)IPX3
Method: water sprinting experiment
a. Throwing water springting experiment.
Test equipment: throwing water spraying experiment equipment( please reafer chapter 2.14 for the drawing and method)
Sample mounting: choose tube with proper diameter. Put the sample on radius of the mounting place. Make sure the distance between the sample and the spray head not exceed 200mm. No rotation.
Test condition: over flow rate: each output 0.07L/min. when spray water, from the middle point , with an angle of 60degree. The sample was mounted on the middle of the circle.
Constant water springting for 10 minutes b. Sprining water experiment
Equipment: manual water sprinting equiment, please refer to the chapter 2.14 in this book.
Sample mounting : the horizental distance between the top and the hand is 300mm to 500mm.
Experiment condition: must install a board with a balance for weighing, water flow is 10L/minutes
Experiment time: calculated according to the area of the cabinet shell. 1min per sqm( not include the installation area. (4)IPX4
Method: water pulling test
Thriving water pulling test
Equipment and sample position: same as the 3 above
Experiment condition: same as the condtion a of 3 IPX3.
The spring area is with a 90 degree angle, then spring to the ample which is mountintg in the middle of the circle.
Experiment time: same as the number 3 and a of IPX 3 ( 10minutes) (5)IPX5
Method: water spring experiment
Experiment Equipment: diameter of spring tube is 6.3mm, refer to 2.14 in this book
Experiment condition: distance from the sample to the tube is 2.5-3m the water flow is 12.5L/minute
Experiment time: according to the area of the cabinet shell. 1min/sqm (not include the installation area) at least 3 min. (6)IPX6
Method: high instensity water springing experiment
Experiment Equipment: diameter of water tube is 12.5mm, refer to the 2.14 chapter
Experiment: distance from the sample to the tube is 2.5-3m the water flow is 100L/minute (7)IPX7
Method: short time water drank experiment
Experiment equipment, condition: water tank, distance from the bottom of sample to the surface of the water should be 1m at least.
Experiment time: 30min
Method: constant water drank experiment
Experiment equipment, condition and time: negotiable by both side. Higher demand than IPX7
发帖者 Unknown 时间： 下午6:36
LED display Cabinets Aluminium profile
Features of aluminum extrusion profile
Main Processing: cutting,sawing,drilling,milling,punching,bending,welding,CNC processing...
Surface Treatment: mill finish, sandblasting,powder coated, anodized, electrophoresis, spraying,PVDF coating, Any colors are avaiable
Products information: Max length: 6000mm/Max OD:300mm/Mini wall thickness:0.5mm/Mini tolerance:0.05mm
Offer Service: Mould tooling R&D services/ Production:extrusion or die casting/ Precision deep processing/ Customize: as per customer's drawing or sample
发帖者 Unknown 时间： 下午7:12
Die neuen LED-Anzeigetafeln von Microgate.
Für jede Situation geeignet, funktionell, genau und sehr hell. Dies bieten die neuen Anzeigetafeln von Microgate: Ein zukunftsweisendes Konzentrat von Technologie mit modularem Aufbau, ideal für Wettkämpfe, aber auch für die Anzeige von Informationen und Werbung.
Der neue Qualitätsstandard des Markts...
...die folgenden Merkmale ihrer Einzigartigkeit sind:
Starke Helligkeit für perfekte Anzeigen auch bei Installationen im Freien und im direkten Sonnenlicht. Die Fotosensoren regulieren automatisch die Helligkeit und garantieren somit eine perfekte Sicht in sämtlichen Lichtverhältnissen.
Der LED-Abstand (oder Pitch) von 10mm gewährleistet eine optimale Auflösung auch bei präzisen und beweglichen Grafiken.
Um Flattern während der Videoaufnahme und verschwindende Zeichen oder Teile von Fotografien zu vermeiden, unterstützen die Anzeigetafeln von Microgate die statische Aktivierung (statisches Driving) der LEDs, damit letztere stets eingeschaltet sind.
Zuverlässigkeit auch bei extremen atmosphärischen Bedingungen. Aufgrund der hochqualitativen Elektronik ist der Betriebsintervall sehr groß: von -20° bis +40°.
Interne Akkus (auf Anfrage verfügbar), um die Anzeigetafeln ohne Anbindung an den elektrischen Strom zu verwenden.
Modularer Aufbau (für MicroGraph und MicroTab). Die Anzeigetafeln können ganz einfach zu einer LED-Wand der gewünschten Größe zusammengebaut werden. Dies ist aufgrund des exklusiven Befestigungssystems von Microgate möglich, welchen einen immer gleich bleibenden LED-Abstand auch an den Übergangsstellen sicherstellt.
Konnektivität. Die Anzeigetafeln von Microgate sind mit verschiedenen Kommunikationsschnittstellen ausgestattet: 2 serielle Ports, USB, Ethernet und Wi-Fi (optional). Außerdem können alle Module mit dem Linkgate-Impuls-Funkübertragungssystem verbunden werden (optional für MicroTab Light).
Kompatibilität. Die Anzeigetafeln sind mit Omega-, Alge-, Digitech- und anderen Zeitmessern kompatibel. Es ist außerdem die Anzeige von Informationen verschiedener Instrumente, wie Windgeschwindigkeitsmessern, Thermometern und Geschwindigkeitsmessern möglich.
LED Display Purchasing Guidance By APOLLOMI
What need to be considered when deciding the size of the LED 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 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: ≥640 x 480 dot matrix
4) Complete computer video: ≥800 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:
2) Semi outdoor: >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视网膜 has different feeling for different wavelengths of light. After a large number of experiments and test, 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 screen 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染色性 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 screen selected wavelength close to 515nm pure green LED light pipes, such as the choice of 520nm, 525nm or 530nm wavelength LED light tube.
When you know the brightness and the resolution, how to calculate the brightness of a single led?
Caculate as follows: (2R1G1B)
Red LED brightness: brightness(CD)/ M2/dots/M2 x 0.3/2
Green LED brightness: brightness(CD)/M2/dots/M2 x 0.6
Blue LED brightness: brightness(CD)/M2/dots/M2 x 0.1
E.G : 2500dots/sqm, 2R1G1B, brightness per sqm is 5000 CD/M2
so red led brightness is as follows: 5000/2500 x 0.3/2=0.3
green LED brightness :5000/2500 x 0.6/2=1.2
blue led brightness:5000/2500 x 0.1=0.2
brightness of a single pixle :0.3 x 2+1.2+0.2=2.0 CD
Why choose DVI graphics card standard interface?
1) DVI graphics card interface is in line with 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 relatively longer life span, Domestic led attenuate faster.
indoor full color LED dot matrix display 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 display 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 SMD used for outdoor display? Why?
No. Outdoor screen has high demand of installation and structure, SMD 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?ˉs input must be grounded. Note: The computer?ˉs 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.
发帖者 Unknown 时间： 下午6:18
Ho to Maintenance the LED Display?
Like many traditional Electronic products, LED display screen not only need us pay attention to the way of use the process of using , but also need us to know the maintenance the LED display .Through that,it useing life will be longer .Here are ten ways of how to maintenance the LED display .
Keeping the full color LED display of humidity use environment,do not let any have moisture things go into it.If we let the humidity full color LED display in electric,it will cause the corrosion of full-color display components, and cause permanent damage.
2The most closely to our user is full color LED display screen. It is very necessary to do well the maintenance work.If the display prolonged exposure in outdoor environment having wind, sun,dust ,it will easily to dirty. After a long time,there are certainly dust on the screen ,which need to be cleaned timely to prevent dust long time parcel surface to influence the watching effect.
3To avoid meet some problem, we can combine the passive protection with active protection,and try to keep away from the items that will caused some damage to display screen .When you clean the screen ,please gently wipe as much as possible,to minimize the possibility of injury to the LED display .
4Advising the rest time of led electronic display is above two hours every day.In the rainy season,the large LED display screen at least rest one week or more than once. At least turn on the screen once on a month,light up more than 2 hours
At previous chapter ,we have already talk about four ways to maintenance LED display panel. In this article, we will continue to talk about this topic.
5:It require the stability power supply , and having good grounding protection, do not use it in bad weather conditions especially in the thunder weather.
6 Do not let the conductive metal such as water and iron powder go into the LED display cabinet. Please use the LED display screen in a low dust environment, because the big dust will not only influence the display effect but also be harmful to the circuit. If have water went into the outdoor led display or others types products due to various reasons，please turn off it timely and keep in touch with the maintenance staff, until the screen display board dry it can use .
7 Please pay attention to the switching sequence of LED display .
A: Turn on the control computer and then open it to the normal operation of large LED display.
B: Turn off LED display, then turn off the computer.
8 Do not let the LED display in the all-white, all red, all green, all blue and other bright screen for a long time ,to avoid excessive current, power cord excessive heating, LED light damage, then affect the using life of LED display .Do not disassemble,stitching screen .
9 You can use alcohol to wipe the surface of LED display , or use the brush, cleaner for dust. Do not use the damp cloth direct to wipe it .
10 LED display screen need to check it whether it can be working normally ,check the LED display module for damage, and maintenance or replace the damaged module .The non-professionals are prohibited to touch the line in LED display cabinet , in order to avoid electric shock,or caused damage to the line. If a problem occurred,please let the expert to repair it
Pixels Uncontrolled Rate in LED Display Screen
In this article, we'd like to talk about pixels uncontrolled rate in LED display screen. It refers to the proportion of minimum image display unit (pixel) uncontrolled .
There are two types of it :
one is in need of light when it is not bright, called blind spot ;another type is in need of not bright when it always having bright , it called often highlights. Usually , the composition of pixels is 2R1G1B（two red、 one green and one blue light , the following statement is in same reason) 、1R1G1B、2R1G、3R6G etc. Uncontrolled generally is not the red 、green and blue light in one pixel are all out of controlled, but if only one of the lights is out of controlled , we think that the pixel is out of control. For simplicity , we statistics and calculate the uncontrolled pixel is according to each color LED display (i.e. red, green, blue) ,then we regard the maximum value as the display pixels out of control.
The proportion of display pixels out of control in the total number of pixels in the full screen is called "full-screen pixel control rate." of led electronic display. In addition , in order to avoid runaway pixel concentrated in a certain area , we put forward the "regional pixel control rate", that is to say in the 100X100 pixel area , the number of uncontrolled pixels and the regional total number of pixels (ie 10000) ratio. as for ” the uncontrolled pixels is discrete distribution” in "LED display general specification" SJ/T11141-2003, this index requirements were quantified , convenient and intuitive.
At present, the LED display in domestic would be aging (baking machine) before they send out to factory , they will maintenance and replace the uncontrolled LED light , it is no problem that the “full-screen pixel control rate” is controlled within 1/104 and the "regional pixel control rate" is within 3/104 .And even some led display manufacturers are not allowed having out of control pixels before the factory, but it will increase the manufacturing maintenance costs and extend the delivery time . In different applications, the actual requirements of pixels out of control is big difference .In general , if the LED display is used to show the video, the index control in 1 / 104 is acceptable and also can be achieved, but if it is only used to show the simple characters information , the index control in 12/104 is reasonable.
How to Choose the Specifications of Full Color LED Display?
1 If the environment is different, the corresponding waterproof requirements are not the same, and it depends on the position of LED display is outdoor, semi-outdoor or indoor. Waterproof requirement of the outdoor led display is high, generally above IP65. According to in what kind of environment, we can know the general choose range is outdoor full color display, semi-outdoor full color display, or indoor full color display.
2The viewing distance is very important; it directly determines which kind of LED display model you will purchase. Generally speaking, the generally module of indoor full color LED display is P6, P7.62, P10, p12 etc; while the outdoor full color LED display is P10,P12,P16,P20 etc . These are conventional, but also such as pixel screen, curtain screen, the special specification model without the same screen. The figures behind the conventional P are the distance between lamp beads, in millimeters. In general, the minimum distance of our visual is equivalent to the size of P behind the figures. The best spacing of P10 is 10 m; this method is only use as approximate estimates.
Another scientific method is that calculated the density of lamp in per square .For example, the point density of P10 is 10000 points / square, the best distance is equal to 1400 divided by (the square root of the density of points). P10 is 1400/10000= 1400/100 = 14 open square meters, so the best observation of P10 screen is 14 meter away.
The above two methods are directly determines the full color LED display model .Pay attention to the following two points when you are choosing:
1 environment of the LED display.
2 the distance from the best observation position to the screen. Only by understanding these, you can choose to match with your environment, and achieve the best results of the full color LED display.
Special Considerations of Outdoor LED Display Screen
The outdoor LED display mainly has the following problems:
owing to the display screen is installed in the outdoor environment as advertising signs etc,will often exposure in the sun,splashed wet in the rainy day, suffer the wind blowing and dust covered, it working in the bad condition. If the electronic equipment is become seriously wet or damp, it can cause short-circuit or even catch fire, causing fault or fire, lead to the losses. LED display may suffer the attacks of strong electric and strong magnetic which due to the thunder.
The working environment temperature of led display is change greatly. When the display is at working ,it always send out a certain amount of heat ,if the environment temperature too high and the heat not dissipate smoothly, it will cause the integrated circuit may not work properly, or even burned down, so that the display system cannot work normally.
In view of the above special requirements, outdoor LED screen must be done:
1: The screen and the screen body and architecture combine department must be strictly waterproof leak. The screen body must have good drainage; if occurred water accumulation, the water can smoothly discharge.
2: The display and the building must install the lightning protection device.
3: The shell and the main body of led outdoor display maintains good grounding, grounding resistance less than 3 ohm, so the large current caused by lightning can discharge timely.
4:In order to reduce the temperature, it need to installed the ventilation system, so that can control the temperature of the led display body is between -10℃ and 40℃.
5 Behind the screen body , must installed the axial flow fan, to exhaust heat .
6:In order to ensure the viewing effect in the bright environment of the led display under long-range , high brightness light emitting diodes must be selected.
7:Selection of working temperature between -40℃ and 80℃ industrial integrated circuit chip, prevent the winter temperature is too low so that the screen cannot start.
As a company must pay attention to the LED display technology: Pixel Correction
Attenuation of the LED itself, will affect the LED display of the "life", then the cost considerations, the correct display of how to improve the life of it?
LED display is composed of a number of LED's, and even the same batch of LED, brightness and wavelength dispersion is also large, which leads to inconsistent display (Huaping) problem. If different batches of the LED to be used in combination, then the display will be more consistency is poor, "the video, dirty screen" phenomenon will be more serious, serious impact on viewing. So far only point by point correction technique can improve the consistency of the entire screen display, lifelike color reproduction level, and a mature point of correction can be achieved by different batches of LED production mix, and ensure consistency of the entire screen display good color reproduction more realistic. Point by point correction technology also enables a large screen display in the viewing field to select the appropriate locations on-site calibration, to ensure that the display position in the field to watch the high degree of consistency. This feature can provide customers with value-added services that display in the use of relatively long period of time (one year) after the decay of the inconsistency led to the LED display "Huaping" phenomenon, in the field of display can be provided to customers point by point calibration services, greatly improved screen display, like the new screen-like.
LED display technology becomes increasingly sophisticated, point by point correction technique in which the rise of technology in recent years, one of the industry will become a must-have technology. In the course of the LED light will be bad, install the application on the screen, the screen uniformity will decrease. Therefore, on-site re-calibration technology LED display manufacturers should become another important technique to master. Dakco Industrial Holdings Ltd. Will constantly strive for the early R & D to fully grasp these two important technologies to provide customers with better products and services.
Industry on the development prospects of LED display
LED display seems to have entered a season, LED display showing how future development will be a trend yet. Many in the industry for the future development of LED display some analysis, if so, you can based on the actual LED display dealer situation, refer to the following.
Large amounts of capital into the LED industry, on the one hand quickly down the costs for the industry, it also exposed the many problems of disorderly competition. Once the core technology, insufficient manpower shortage and other sectors can not be improved, LED industry is still subject to the shortest of the short board, and can not achieve the desired capacity.
Throughout the crisis facing overcapacity in this year's LED industry has periodically invested state of serious overheating. In this case, there is a voice of industry, LED how to deal with excess capacity? Evidently, a lot of LED lighting companies have mastered the current low-power chip technology, and high-power LED lighting on the epitaxial material demanding, in this context, the Chinese companies in the LED in order to capture a slice of the upstream industry chain is extremely difficult, and only a small part of the business can survive in the cracks. Insiders pointed out, LED market access threshold is low, the initial investment of 100 million plant can make LED projects have been started all over, and many had never set foot in the LED industry, companies have also joined them.
According to expert analysis, LED explosive situation seems a bit with the previous polysilicon LCD panels and similar. From the current and planned construction projects statistics show, LED production capacity of at least 3-5 borrowing against future market demand. After the completion of a large number of LED projects will highlight the LED industry is not concentrated, excess capacity, market disorderly competition and lack of skills and other thorny issues.
The worry is that while investment in Redu high, but the market is not optimistic. This year the price of the sapphire substrate has been declining. According to related statistics show that from January to July this year, 2-inch sapphire substrate prices from the beginning up to $ 35 / piece, down to the current $ 13 / piece -15 USD / piece, the average fell by more than 50%.
It should be pointed out that the upper reaches of the excess capacity will inevitably lead to the LED chip prices, while the LED chip in the product the higher the proportion of total cost, so that the end product is likely to further price cuts.
If you can bring the market price is also something that is not a universal way, but the problem is also reflected in the technology. LED tube lamp than the average price is indeed high, but not a major problem. Many small and medium enterprises in the production of LED lamps do not pass the quality and technology, often necrosis. Companies need to devote more efforts in the application of technology, rather than to invest in the upstream.
The Definition of LED Display
LED is the English abbreviation of light-emitting diode (Light Emitting Diode ) . Light Emitting Diode is a electronic apparatus, it can convert the electrical energy into light energy electronic and having the diode characteristics. The Internal structure of light emitting diode is a PN junction. When the electrons and caves in the light emitting diode are composited, the electronic transition from the high energy level to a low energy level, the electronic release the excess energy in the way of emission of photons (electromagnetic wave), to produce the electroluminescence phenomenon
LED luminous color and luminous efficiency are related to production of LED materials and processes. At present, the red, green, and blue are widely used .
Since LED low voltage (only 1.5-3V), it can take the initiative to lightness and have certain brightness ,the brightness can used for voltage (or current) regulation , which itself has impact resistance ,vibration resistance, long life (100,000 hours), so in large display device, there is no other display way can compared with LED display screen.
LED display is a display device that composed of the arranged light-emitting diodes. It uses low-voltage scanning driver ,has the advantage of long service life , low cost, high brightness, small fault , large viewing angle ,far viewing distance , color and pattern changes rich , dynamic real-time response speed, etc. LED display screen adopts modular in design, display area is according to the size of any unit module arbitrarily splicing.
led electronic display can be used to display a wide variety of propagate messages, which can be used to display text, graphics, images, animations, quotes, video, video signals .it has large information content and also has many display ways ,such as text, graphics, images, animation and video .LED display with its perfect mu
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