(1) is divided into indoor display screen, semi-outdoor display screen and outdoor display screen according to the use environment.
(2) According to color, monochrome display, bicolor display and full color display.
According to the characteristics of different LED display screens and the actual needs of users, choose the appropriate display screen.
Generally speaking, stations, wharves, entrances and exits of big markets, and elevators are guided by Φ 5.0 monochrome display screens. It has the advantages of clear font, low price and cluster control.
For banks, shopping malls and other applications to display corporate image, advertising and so on, low prices are required, and φ3.75 dual-color display screen is adopted. In order to display the effect, a φ5 full-color display screen is needed.
The hall has a large area and adopts φ5 double primary color display screen. The display effect adopts φ 1O full-color display screen.
For the functional definition of service windows in banking, postal services, electric power and other business halls, the previous method of using stickers was very inflexible. Now using φ3 or φ5 display screen, you can change the service function of the window at any time.
Due to the harsh environment, outdoor display screens require higher quality. There are many factors to consider.
From the perspective of use, full color is the mainstream in the future. Because of its high brightness, full color and all-weather work, it has its irreplaceable advantages, but the price is higher.
From the application point of view, products that meet the needs of users have a reason to exist. Dual primary color display screen has occupied a large market because of its low price, maturity and stability without blue color and low requirements for display characters.
The direction and distance of outdoor screen play a decisive role in the price. The farther the distance, the larger the pixel and the higher the brightness. The one facing northeast is much cheaper than the one facing southwest.
Misunderstanding in procurement of LED display screen
1.According to the technical data issued by the LED material manufacturer, the life of the LED emitter is 1 O ten thousand hours in an ideal state. The ideal state refers to the time from luminescence to non-luminescence in the laboratory under the condition of constant pressure and constant current. 1 O ten thousand hours is equivalent to 1 1 year.
The amount of a bucket of water is determined by the bottom board, and the service life of the civilian-grade devices currently used in LED display screen is no more than 8 years. As a display screen, its function is to watch. When the display screen is on, it can only be seen clearly at night, and it can't be said to be qualified and valuable.
A car can run for 1 5 years, and it will be scrapped after being idle for 3 years. The environment and methods used have great influence on the life of products.
Second, it conforms to national standards.
The general specification of LED display screen is the ministerial standard of 1995. Up to now, many companies claim to meet the national standards. If we look at the standards at that time eight years after the development of science and technology, it is no longer a standard. For example, the out-of-control point is three ten thousandths. Take φ3.75 indoor two-color display as an example. Generally, the display screen with standard resolution of 640x480 is 7 square meters, with 43,264 dots per square meter. According to national standards, there can be 90 out-of-control points. Who will pay for such a display today?
Third, the software is free.
China enterprises generally have a problem in the display industry-only producing but not developing. At present, only a few enterprises have genuine software. It is illegal to use piracy now.
Fourth, look at the cost performance. It depends on the cost performance, not just the price.
Verb (abbreviation for verb) gray scale
As a two-color and full-color display screen, gray scale is an important indicator. At present, the market is full of many display screens with16,64 gray level posing as 256 gray level. Its control cost is only 1 of 256 gray level control. The easiest way is to put a VCD of a more intense sports scene and see if it can be seen clearly on the LED display screen.
Six, want to buy the best, all purchasing power comes from the need. Meet the demand and have a certain lead. Blind pursuit will waste a lot of money to buy functions that you don't need.
Application is the foundation. Because application consultation, software upgrade, hardware maintenance, maintenance and repair all need the support of manufacturers.