1. Users can be allowed to consider the venue of the screen area of the body which factors?
(1) the effective size of the venue and the actual line-of-sight relationship;
(2) pixel size and resolution;
(3) units to estimate the size of the base;
(4) screen-mechanical installation and maintenance of space operations;
(5), body angle of the screen distance.
2. Users need to play what effect?
(1) of the text: as the size of its text and to identify those needs;
(2) ordinary video display: 320 × 240 dot-matrix;
(3) figures show that DVD standard: ≥ 640 × 480 dot-matrix;
(4) a complete computer video: ≥ 800 × 600 dot-matrix;

3. Environment for screen-brightness which brightness requirements?
General brightness requirements are as follows:
(1) indoor:> 800CD/M2
(2) indoor and a half:> 2000CD/M2
(3) outdoor (sit Southern North):> 4000CD/M2
(4) outdoor (sit south):> 8000CD/M2

4. In the red-green-blue and white constitute what kind of brightness requirements?
Red, green, blue and white in the fine aspects of the contribution is not the same. The fundamental reason is that the human eye's retina to different wavelengths of light and feel different. After a large number of experiments testing the following about the ratio for the reference design:
Simple blue light than red and green: 3:6:1
Accurate than the red-green-blue light: 3.0:5.9:1.1

5. Why do high-end full-color display tubes to use pure green?
In practice, the production of LED display, should be selected high-efficiency light-emitting and can be color-rich trichromatic bright LED lamp, so that the color map of the area as far as possible in the color triangle and close to the tongue-shaped curve of spectral color, To meet the rich color and brightness to issue enough and the tongue-shaped curve leading to 515nm wavelength light, the high-end LED display selected wavelength close to 515nm pure green LED light tube, such as the selection of 520nm, 525nm or 530nm wavelength of light LED lamp .

6. In a clear point of brightness and density requirements, how to control the brightness of a single computer?
Calculated as follows: (two red, one green and one blue, for example)
Red LED light brightness: brightness (CD) / M2 ÷ points / M2 × 0.3 ÷ 2
Green LED lamp brightness: brightness (CD) / M2 ÷ points / M2 × 0.6
Blue LED light brightness: brightness (CD) / M2 ÷ points / M2 × 0.1
For example: 2,500 square meters for every point density, 2R1G1B, per square meter brightness requirements for 5000 CD/M2, are:
Red LED lights for brightness: 5000 ÷ 2500 × 0.3 ÷ 2 = 0.3
Green LED lights for brightness: 5000 ÷ 2500 × 0.6 ÷ 2 = 1.2
Blue LED lights for brightness: 5000 ÷ 2500 × 0.1 = 0.2
The brightness of each pixel point for: 0.3 × 2 +1.2 +0.2 = 2.0 CD

7. Why choose DVI display interface standard?
(1) DVI graphics card interface is in line with international standards for computer display interface;
(2) no need to open the box, easy to install;
(3) memory, dynamic screen display capability;
(4) compatible hardware and software capability;
(5) to support all operating systems and application software, display flexibility;
(6) high-volume, low cost, easy to maintain.

8. Screen can not be used to control the laptop, why?
Can not. The notebook computer is built-in graphics cards, can not be achieved with the control system to connect.

9. Full-color screen on the use of sub-tube and tube used in addition to domestic price, what's the difference?
(1) die: Japan Asia's self-chip production, domestic use of the general control of the United States or Taiwan's die;
(2) package: on their own Sub-packaging company, with domestic production factories, domestic manufacturers more control package;
(3) Consistency: awarded with possession of Nichia die wavelength difference between the smaller, consistency, consistency of China-made pipe relatively poor;
(4) life: Nichia longer service life of pipes, tubes made more serious decay;

10. Indoor full-color module and patch What is the difference between full-color screen?
(1) light-emitting components: Module full-color display modules for general of the green, pure green module prices more expensive; patch-wide general use of pure color green die;
(2) results show: Module full-color pixel visual sense of coarse, low light, easy to have a mosaic phenomenon; full-color patch better consistency, higher brightness;
(3) the maintenance of: full-color module is not easy to maintain, the higher the cost of replacing the entire module; patch full-color easy to maintain, repair can be replacement of a single lamp;

11. Outdoor tables can not be used to screen affixed to LED, why?
Can not. Outdoor screen to install strict structural requirements, LED patch can not adapt to the harsh environment of the outdoors;
Outdoor screen brightness higher, the patch is currently unable to meet the outdoor LED screen brightness requirements.

12. The outdoor screen a longer production cycle Why?
(1) procurement of raw materials: LED lamp longer procurement cycle, in particular, imports of die, the order cycle takes 4-6 weeks;
(2) of the complex production process: to be approved by the PCB design, production casing, filling plastic, white balance transfer, and so on;
(3) demanding structure: The box is generally designed to take into account wind, rain, lightning and so on.

13. How to help users choose the screen?
(1) the needs of the content of the show;
(2) visual distance from the perspective of recognition;
(3) screen-resolution requirements;
(4) the installation of environmental requirements;
(5) cost control;

14. The general length and width of the screen ratio?
Graphic screen: According to the show's content to be confirmed;
Video screen: usually close to 4:3 or 4:3; ideal ratio of 16:9.

15. A control system to control the point?
A screen communications card: monochrome, dual-color 1024 × 64
B-screen communication card: Monochrome: 896 × 512 color: 896 × 256
DVI dual-color screen: 1280 × 768
DVI full-color screen: 1024 × 512

16. The screen installation requirements?
Power requirements: power supply wiring should be in the physical size of the screen
City 220V power supply, the line of fire line grounding line 0;
City 380V power supply, the line of fire three 10-line grounding line;
0 line and the line of fire wire the same cross-sectional area;
Display more than 10 kilowatts should start the step-down equipment.
Communication: Communication is based on the distance to the definition of a long line of communication.
To be installed to display the type used by the standard length of the lines of communication to the installation of communication lines.
Prohibition of communication lines and power lines in the same pipe line alignment.
Installation requirements: the installation screen about the level of dumping is not permitted after
To regulate the installation of lifting up and down under
Before the installation of wall mounted forward off hook
The installation of ground support bolts to increase positioning.