LCD splicing display unit because of its thin screen and become a trendy new splicing display technology, in recent years, with LCD display (LCD) for splicing unit of large screen system, application in the field of large screen monitor attention gradually, on the one hand, stems from rising liquid crystal TV, home appliance industry under this trend, LCD applications in other industries also for trend gradually. LCD screen, on the other hand, the related parameters in the increase, with low power consumption, light weight, long service life (generally working 50000 hours), with no radiation, screen brightness uniformity, colour and lustre bright-coloured, etc, and splicing gap narrowing, achieve unilateral flat-fell seam 11 mm, minimum prices are falling, used in industrial control, information release, a wide range of areas, such as slit image monitoring LCD splicing display system of relatively low construction cost, it is also a slit the inevitable reason of liquid crystal splicing display system arises at the historic moment. How to choose suits own joining together, also be one thing on the minds of users to compare, from several aspects to illustrate for you below:
According to the size of the choice
Did the narrow side LCD splicing display system are mainly 40 inch and 46 inch two specifications.
First of all, from the height and width of the room.
For example, a reserved area for indoor display wall: 8.8 meters wide, 3.2 meters high.
As a first step, with highly minus 1 m at the bottom of the first support height, 3.1 m - 1 m = 2.2 m.
Next to highly selective display from the display size, 16:9 display size, the height of 40 inches generally 520 ~ 520 mm, width is generally 910 ~ 910 mm, 46 inch generally 600 ~ 600 mm, width is generally 1040 ~ 1080 mm.
Calculated based on the basic size we stacked layers, 40 inches: 2200 present 550 = 4, 4 highest layer, 46 inch: 2200 present 630 material 3.5, rounded, the top three layers. Follow us to confirm display width, 8.8 m is the size of the room, display area should be in the middle of the part, need to minus the width on both sides of the door or decorate at least 3 meters, is the reality of the wall width up to 5.8 meters, then you can to calculate the number of rows of columns display, 40 inches: 5800 present 950 material 6.1, rounded, for up to six columns; 46 inch: 5800 present 1080 material 5.4 rounded, up to five columns.
So, in theory the joining together of scale came out: 40 inches, 4 x 6; 46 inch, 3 x 5.
Next, we're going to choose. 40 inches for choice: 2 * 2 * 3, 2, 2 * 4 * 6, 3 * 2, 3 * 3, 3, 3 * 4 * 6, 4 * 4, 4 * 6; 46 inch applicable choice: 2 * 2 * 3, 2 * 2, 3, 4, 3 * 3, 3, 3 * 4 * 5.
If it is a big screen video monitoring the whole screen display images or command and control center all the way high resolution image, suggest to choose the appropriate specifications, normally, 2 x 2, 3 * 3, and 4 x 4, because be the 16:9 screen, so the general selection principle is the number of columns of lines or less, or graphics will flat long show.
If it is single, no combination zoom in use, the splicing size can be designed according to the size of the largest.
In this example, selection is more appropriate for the whole wall: 3 x 3 46-48 "; 4 x 4, 40 inches.
Choose the best principle generally follow the same area, the large size is preferred, the reason is that large amount of splicing gap size, the overall style is simple.
An alternative approach is to, in the same plane, display number of do more commonly used in place of video image monitoring number.
According to the signal demand analysis and equipment selection
Signal analysis:
Big screen splicing field color display signal is divided into three categories: whole video, computer, network.
DID slit LCD splicing display system with perfect video and computer interface, currently do not have a network interface, therefore, are mainly composed of video images and computer graphics.
Video interface generally provide: a set of RCA composite audio and video input, YCbCr analog input a set of color; Industrial interface USES the BNC card head. Cable specifications are commonly used for 75-3,75,75-5-9, three general indoor use 75-3: transmission distance control within 100 meters; 75-5: transmission distance in 100 meters to 300 meters, professional cable: 400-800 meters; 75-9: transmission distance in 300 meters to 300 meters; Within 800 meters, professional cable: 800-1600 meters; 800 m - 20 km, with optical fiber. More than 20 kilometers.
Computer interface generally provide: VGA analog input all the way; D - Sub15 needle and RGBHV two main types of specifications, the wire diameter for,75 75-2-3,75 commonly - 5 3 kinds. The transmission distance with VGA line 75-2, 20 meters to 30 meters; 75-3 lines, 30 meters to 50 meters; 75-5 line 50 meters to 100 meters.
Digital computer interfaces provide commonly: DVI digital video or HDMI digital audio and video input all the way; Commonly used specifications of 1.8 meters to 15 meters.
For advertising media applications, will be fixed using composite video interface, or configuration using chromatic aberration, DVI, HDMI hd player;
For pure video monitoring room, will only use composite video;
For command and control center and industrial control center, will be based on the mixing of video and computer display;
For business office or business center hall, will take the video signal is given priority to, mainly for the business promotion and information release, according to the requirements of image display, can choose to configure hd broadcast equipment
Image processing equipment:
Commonly used video devices include video splitter, video signal extender, video matrix switcher, video signal image processor, video signal converter which several main equipment.
Video distributor, mainly used for copying the source video output signal into multiple output; The main application of type 1 points 3, 4, 1, 8, 1 points 16 four specifications. In the form of interface RCA and BNC two kinds.
Video signal extender is mainly used for video signal attenuation supplement, video signal transmission distance of the interior is not more than 100 meters, don't need to configure the signal amplifier, more than 100 meters to extend use signals;
Video matrix switcher, mainly used in the multi-channel video signal input and output channel switching, implementation of 1 into the more the number of choices. Divided into two kinds of interface, RCA and BNC.
Video signal image processor, it is mainly used for multiple input signal on a screen, commonly used specifications for the 4 pictures, 6, 9, 13, 16 five picture format.
Video signal converter main function is to convert video signals into the computer VGA signal output.
Computer signal processing equipment mainly includes the VGA signal distributor, VGA signal extender, VGA matrix switcher or RGB matrix switcher.
VGA signal distributor for copies the output port of the computer breaks down into multiple VGA output, commonly used specifications for 1 minute, 2, 1, 4, 1 points 8, 1 16 four points.
Extender, VGA signal is mainly used for long-distance transmission, computer signals have twisted pair transmission and optical fiber transmission in two ways, using twisted-pair transmission, live within 200 meters, 200 meters above must use optical fiber transmission.
VGA matrix switcher or RGB matrix switcher is computer signals of multiple input/output channel selection, 1 into more or more for more, can be arbitrary switching. VGA matrix switcher use computer common VGA interface, RGB matrix switcher refers to the computer signal is decomposed into red, green, blue, line frequency, field frequency five independent channels, its transmission signal stability, is a VGA far some, commonly used 5 BNC interface.
More screen splicing controller:
It is mainly used for video, computer and network signal display. Login can remote network management, image display is convenient, can the whole screen, display window, the single pictures showed.
More screen splicing controller can be up to 32 road access video input, conventional four-way VGA input, 2 road network input, the output cable can use a VGA or DVI, output channel number and the number of screens.
As the DLP rear projection, PDP plasma splicing curtain wall and the increasingly heated competition DID LCD splicing, the advantages of liquid crystal splicing also gradually get more and more industries and fields.