Purchase and Design specification on LED display
Three important factors in designing the screen size:
(1) Display need of the content;
(2) Site space condition;
(3) Display unit board size(Indoor LED display) Or Pixel size(Outdoor LED display)
.
Require with the power supply and power consumption
The power consumption of the display is divided into average power consumption and the maximun power consumption. The average power consumption is also called working electric consumption, is the actual power consumption at ordinary times. The max power consumption is the power consumption while starting or at the time of all bright extreme situations, shoule be the alternating current power supply (line foot-path, switch,etc.) Key element that must be considered. The average power consumption is generally 1/3 of the max power consumption.
Display belongs to large-scale accurate electronic apparatus, for use safely and able to work, its AC220V power input terminus or AC220V power input terminus of linking the computer with it must be grounded.
Note: AC220V power of the computer imports the earthing end and already links with chassis of the computer.
The questions that should be considered in Outdoor LED Display
The display is installed outdoors, often exposed to the sun and rain, the wind blows the dust to cover, the working environment is abominable. The electronic apparatus will cause the short circuit even break out a fire while drench or is made moist seriouslying, initiate trouble even fire, cause damages;
The display be attacked by the strong electricity strong magnetism that the thunder and lightning cause;
The ambient temperature is changed greatly. Display itself produce certain heat soon work, if ambient temperature too high and dispel the heat not badding, the integrated circuit may work abnormally, even is burnt, thus make the display system unable to work normally;
Viewing distance is required far, viewing angle is required widely; environmental brightness is changed greatly, especially may be penetrated directly by the sunshine.
To the above special requirement, the outdoor display must be accomplished:
The combination department of screen and display screen with building must rigorously enforce the waterproof leak protection; There are good water drainage measures to the screen body.
Install the lightning device on display screen and building. Display screen subject and outer cover keep good earthing.
Installation ventilation equipment to lower the temperature. Install axle shed air blower, list heat behind the body;
Select one grade of IC chips of working temperature between -40℃～
80℃ for use, prevent the hypothermia in winter from making display screen unable to start. ;
In order to guarantee that can depend on remotely, must select superelevation luminance LED for use under the situation with only strong environment;
Environmental luminance requirements
Indoor LED display: >800CD/M2
Semi-outdoor LED display: >2000CD/M2
Outdoor LED display(Face north): >4000CD/M2
Outdoor LED display(Face south): >8000CD/M2
DVI interface standard
DVI display card interface is the display interface which accords with the computer international standard;
Installed can be convenient, do not need turning on machine case.
Store apparently high, the dynamic picture reveals ability is strong;
The compatible ability of the software and hardware is strong;
Support all operating systems and application software, it is flexible and convenient to display.
Produce in enormous quantities, with low costs, convenient to maintain.
Outdoor LED Display cannot use SMD LED.
As outdoor LED dispaly installation structure require strict, SMD LED can't adapt to the abominable environment of the open air; and the outdoor reject luminance expect relatively much, SMD LED unable to meet the luminance requirements at present.
General long wide proportion of the display screen
Picture and text LED display: Confirm according to the content revealed;
Video LED display: It is generally 4: 3 or close to 4: 3; The ideal proportion is 16: 9.
