The advantages and characteristics of small spacing LED display in emergency dispatch and command center

Time:2018-10-26 Views:237

Indoor small spacing high-definition full-color led display mainly includes P2.5 full-color display, P2 full-color display, P1.923 full-color display, P1.875 full-color display, P1.667 full-color display, P1.56 full-color display and other products.At present, the display technology used in the LED large-screen display system includes DLP (back projection), LCD (liquid crystal) and full-color LED display.The following three display technologies are compared from the aspects of display effect, installation load-bearing, business application and operation and maintenance costs.

1. Display system index comparison

(1) brightness

Brightness determines the visual effect.From the current look, DLP projector plotted on a display unit for its light output lumen, this value is usually 800-1000 lumens, change brightness values, 67 inches in the DLP display unit before the actual screen brightness should be in 200-300 CD / ㎡, the screen brightness value of liquid crystal display unit 700 CD / ㎡, and high-definition digital LED display system with short distances in front of the tent of the brightness can be as high as 1200 CD / ㎡ (indoors, high brightness is not suitable for the user for a long time.High performance driving IC can make the display picture without loss of gray level under small spacing and low brightness of LED, giving consideration to human eye comfort and clear picture.

Therefore, from the perspective of brightness, the high-definition small spacing LED display screen system is the best, LCD is better, DLP display system has the lowest brightness among the three, for the emergency command center, the hall area is larger, so the small spacing high-definition full-color display system has obvious advantages and brightness can be adjusted.

(2) lighting effect

Lighting affects how the image ADAPTS to the environment.For high-definition digital LED display system with small spacing self-illumination features, the screen surface without adding vitreous lens, so even if don‘t have strong light appear on the screen surface phenomenon of mirror reflection or reflected light can‘t see the phenomenon of display content, and LCD and DLP systems due to specular reflection on the surface of the display unit problems, lead to greatly influenced by ambient light.

(3) color saturation and color reduction

Color saturation determines how gorgeous the image is, and color reduction determines how consistent the image is with real natural objects.Due to the wide color gamut range of the LED lamp used for the display screen in the high clarity and small spacing digital LED display system, the screen can experience very good color restoration effect when displaying various pictures and video programs, and perfectly reproduce the gorgeous colors of the real world.The display principle of liquid crystal and DLP display system is essentially projection technology, therefore, its color range is small, color reduction and color saturation are relatively more, there is a certain gap.

(iv) resolution

Resolution determines the clarity of the image.All systems can meet the business expansion requirements of 1920*1080 (full hd) resolution.

Physical joint

Physical stitching determines the degree of segmentation.Hd Zha small spacing by digital LED display system of the screen display pixel dot LED lights arranged, with the high precision manufacturing process in the production of display circuit unit, to ensure that each LED lights display unit spacing and display unit housing LED lamp spacing between consistency, no visible physical splicing gap, and no other optical seam stitching screen.

As stitching display device being splicing gap is inevitable, on the issue of overcome physical flat-fell seam, while DLP splicing minimum can do physical flat-fell seam of 1 mm, but on the whole screen flat-fell seam or visible the DLP system, and LCD display unit of splicing display system physical flat-fell seam is 5.5 mm (currently LG has 1.8 mm physical flat-fell seam of LCD products, flat-fell seam are still obvious).

(6) color consistency

Color consistency mainly reflects the color difference between each display unit.There will be color difference in DLP, and this phenomenon will be expanded with the passage of time. Although color difference can be adjusted, it will cause inconvenience for future application and maintenance.High - definition and small - spacing digital LED display system and large - screen LCD system basically do not have this problem.

Installation and bearing

DLP splicing display system installation space is large, the room environment demand is high, heavy equipment, according to the current computer room environment, if calculated according to 4 by 8, DLP light box need to about 480 kg / ㎡, bearing and also install the LED display screen, logo decoration materials, the current 600 kg / ㎡ design bearing constitute a larger pressure, if coupled with use of maintenance personnel, may be beyond design bearing;The digital LED display system with high clarity and small spacing and the LCD splicing display system are easy to install and maintain.

(viii) business application

All kinds of display systems can meet current and future business application requirements. All display systems have system-level backup measures, which can meet the reliability requirements of emergency command and scheduling.The LCD splicing display system has more display units and has advantages in video monitoring mode.As the display system of the emergency command center, its function is not only to monitor the image, but also to understand the macro development trend or the information surrounding the dangerous situation, so as to better allocate resources, while the business application of LCD screen in this aspect is relatively simple.

Operation and maintenance costs

The brightness of the screen will not decline as dramatically as that of other display systems after a long period of use in the high clear and small spacing digital LED display system and the large LCD screen system. The screen does not need to replace the light-emitting device. In contrast, the operation and maintenance cost can be saved under the same brightness.At the same time, since the equipment maintenance of the high clarity and small spacing digital LED display system is mainly LED units, while the liquid crystal and DLP systems have projection and optics in addition to the source of light, so the maintenance cost of the high clarity and small spacing digital LED display system in the later stage is relatively low

Ii. LED screen displays the overall situation and dynamics of the system

The three display technologies mentioned above basically share the market share of the large-screen display system according to their unique features.Among them, because the DLP splicing display technology is the essence of digital optical processing DLP projection display technology, combined with high speed graphics processing technology of multi-channel signal processing, DLP has high resolution, wide Angle, flat-fell seam is small, low maintenance cost advantages, is widely used in scheduling command before display, exhibition, conference, industrial process control, news broadcast, etc.

The liquid crystal splicing technology combines FPGA array technology and parallel high-speed graphics processing technology to realize the unified processing of multi-channel signals.Because of the characteristics of high brightness, high clarity and high color saturation of the liquid crystal technology, the single screen display effect is good, which makes the liquid crystal Mosaic technology more widely used in outdoor, commercial advertising and power report monitoring.

With the continuous development of the display technology of LED large-screen manufacturers, the large-screen display system of high clarity and small spacing LED with more and more obvious technical advantages continues to enter the command center, dispatch center, performing arts center, conference center and other large-screen display occasions.The high clarity and small spacing digital LED display system adopts the pixel-level point control technology, so as to realize the state control of the reduction and unity of the brightness and color of the pixel unit of the display screen.