1. LED display first priority, of course, the user can allow the body of the screen space area, it is necessary to consider the actual size of the venue, but also to consider the viewing angle and viewing distance. Then the area of ​​LED display screen body What are the factors?

(1) LED screen, an effective line of sight relationship with the size of the actual site;

(2) LED screen pixel size, resolution and the actual origin of the relationship;

(3) LED display unit estimates for the base size;

(4) LED display screen of mechanical installation and maintenance space;

(5) The inclination of the display screen of the distance.

3. Environmental brightness LED display screen body for which the brightness requirements?

General brightness requirements are as follows:

(1) Indoor LED display:> 800CD/M2

(2) semi-indoor LED display:> 2000CD/M2

(3) Outdoor LED Display (sitting northward):> 4000CD/M2

(4) Outdoor LED display (facing south):> 8000CD/M2

5. Why use high-end full-color display of pure green tube?

       LED display in the actual production, should be chosen high luminous efficiency can be a rich vibrant color of the three primary colors

LED lamp, so that the colors in the chromaticity diagram as the triangle area and close to the tongue-shaped spectrum in the color curve to meet the rich

The color and brightness to issue enough tongue-shaped curve for the 515nm wavelength of light top, so the selection of high-end LED display

Wavelength close to 515nm pure green light LED tube, such as selection of 520nm, 525nm or 530nm wavelength of light

LED lamps. 
 

7. Why LED screen display interface standard to use DVI?

(1) DVI graphics card interface is consistent with international standards for computer display interface;

(2) without opening the chassis, to facilitate the installation;

(3) high memory, dynamic screen display capability;

(4) The ability of hardware and software compatibility;

(5) to support all operating systems and application software, display flexibility;

(6) mass production, low cost and easy maintenance.

 10. Indoor Full Color LED Module SMD LED Full Color and What is the difference?

(1) light-emitting part: the module full-color LED display module is generally green and yellow, pure green of the module more expensive;

                              Full Color SMD LED Pure Green die general use;

(2) display: LED full color pixel module visual feeling coarse, low intensity, likely to have mosaic;

                              SMD LED Full Color consistency is better, higher brightness;

(3) Maintenance: Module LED full color display is not easy to maintain, replace the entire module is the high cost;

                      SMD LED full color display is easy to maintain, repair and replacement can be a single lamp;

13. How to help users select the appropriate LED display?

      (1) The display needs;

      (2) visual distance, visual angle of the confirmation;

      (3) Screen resolution requirements;

      (4) installation and environmental requirements;

      (5) cost control;

14. LED display normal aspect ratio?

        Graphic LED display: determined according to the content displayed;

        Video LED Display: generally 4:3 or close to 4:3; the ideal ratio is 16:9.

15. An LED display control system can control the number of points?

        A communication LED display card: color, color 1024 × 64

        Communications LED display B card: Monochrome: 896 × 512 color: 896 × 256

        DVI-color LED display: 1280 × 768

        DVI Full Color LED Display: 1024 × 512

16. LED display of the installation requirements?

       Power requirements: power supply connection point should be within the Screen Size

       220V mains power supply, FireWire 0 line ground wire;

       380V mains power supply, three FireWire cable ground wire 10;

       FireWire cable conductor cross-sectional area with the same 0;

       10 kW or more should be added to buck the boot device screen.

       Communication requirements: communication from the communication line length is defined.

       To install the display of the model to the communication lines with the length of the standard installation of communication lines.

      Communication lines and power lines against the tube in the same line alignment.

       Installation Requirements: LED display installed around the level, do not allow backward

       LED display to be installed lifting the lever up and down

       Wall-mounted LED display screen before installation to lean forward off the hook

       Floor Location LED display installed to add support bolts.

11. Outdoor LED display can not use surface-mount LED, why?

       Can not. Outdoor LED display installation structure demanding outdoor SMD LED can not adapt to the harsh environment;

       Outdoor LED display brightness higher, and the current outdoor SMD LED screen brightness can not reach requirements.

12. Outdoor LED display relatively long production cycle Why?

      (1) procurement of raw materials: LED lamp a long procurement cycle, particularly imports die, order cycle takes 4-6 weeks;

      (2) the complexity of production process: subject to PCB design, production casing, injecting, adjusting white balance, etc.;

      (3) strict structural requirements: general design for the box, need to consider wind, rain, lightning and so on.

8. LED display can not be controlled by laptop, and why?

       Can not. Laptop graphics card is built-in, can not be achieved with the control system connection.

9. Nichia full color tube with the use of domestic pipe what difference other than price?

(1) die: Nichia die independent production, made for General use of the United States or Taiwan company die;

(2) Package: Nichia own package, no domestic production facilities, domestic manufacturers more control package;

(3) Consistency: the same tube at sub-wavelength difference between the die smaller batches, consistency, consistency of relatively poor domestic management;

(4) Life: Japan Asia relatively long tube life, made more serious decay pipe;

6. Brightness and dot density in the clear requirements of the conditions, how the brightness of single-tube computer?

        Calculated as follows: (in two red, one green, one blue for example)

        Red LED lamp brightness: brightness (CD) / M2 ÷ Points / M2 × 0.3 ÷ 2

        Green LED lamp brightness: brightness (CD) / M2 ÷ Points / M2 × 0.6

        Blue LED brightness: brightness (CD) / M2 ÷ Points / M2 × 0.1

        For example: 2500 per square meter density, 2R1G1B, per square meter brightness requirements for 5000 CD/M2, then:

        Red LED light brightness: 5000 ÷ 2500 × 0.3 ÷ 2 = 0.3

        Green LED light brightness: 5000 ÷ 2500 × 0.6 ÷ 2 = 1.2

        Blue LED light brightness: 5000 ÷ 2500 × 0.1 = 0.2

       The brightness of each pixel: 0.3 × 2 +1.2 +0.2 = 2.0 CD

4. Composition of red, green and blue and white, what kind of brightness requirements?

        Red, green, blue and white Condition in terms of contribution is not the same. The fundamental reason is because the human eye retina

Film for different wavelengths of light caused by feeling different. After a number of experimental tests have approximately the following ratio for the reference

Test design:

        Brightness of red, green and blue simple ratio: 3:6:1

       Accurate RGB brightness ratio: 3.0:5.9:1.1

2. LED display screen playback of user needs what?

(1) Text Display: Text Size and differentiate depending on the needs may be;

(2) General Video Display: 320 × 240 matrix;

(3) digital standard DVD Display: ≥ 640 × 480 matrix;

(4) complete computer video: ≥ 800 × 600 matrix;