Screen area considerations can allow the user space have?
(1) The relationship between the effective line of sight with the actual size of the site;
(2) pixel size and resolution;
(3) for the base unit area estimation;
(4) Screen mechanical installation and maintenance space;
(5) Screen angle effect on distance.
Users need to playback what?
(1) Text display: depending on the font size and differentiate needs may be;
(2) ordinary video display: 320 × 240 dot matrix;
(3) digital standard DVD display: ≥640 × 480 dot matrix;
(4) complete computer video: ≥800 × 600 dot matrix;
Screen brightness for ambient brightness requirements What?
General brightness requirements are as follows:
(1) Interior:> 800CD / M2
(2) Semi-room:> 2000CD / M2
(3) Outdoor (northward):> 4000CD / M2
(4) Outdoor (facing south):> 8000CD / M2
Red, green, white and blue in the composition of what kind of brightness requirements?
Red, green, blue contribution is not the same in terms of fineness white. The fundamental reason is because the human eye retina
Films for different wavelengths of light caused by the different feeling. After a number of experimental tests get the following about the ratio for the reference design:
Simple green and blue brightness ratio: 3: 6: 1
RGB luminance precise ratio: 3.0: 5.9: 1.1
Why use a high-end full-color display of pure green tube?
In practice led display production, should choose high luminous efficiency and they can get rich vibrant color of the three primary colors
LED lamps, so the chromaticity diagram color triangle area as the top of 515nm wavelength of light, so high-end LED displays in and near the tongue color spectrum curve to meet rich color and the issue of sufficient brightness and tongue-shaped curve screen selection wavelength close to 515nm pure green light, LED tube, such as the choice of 520nm, 525nm or 530nm wavelength of light LED lamps.
Under clear brightness and dot density requirements conditions, how the brightness of a single tube computer?
Calculated as follows :( with 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 lamp brightness: brightness (CD) / M2 ÷ Points /M2×0.1
For example: the density of 2500 per square meter, 2R1G1B, per square meter brightness requirements for the 5000 CD / M2, then:
Red LED brightness: 5000 ÷ 2500 × 0.3 ÷ 2 = 0.3
Green LED brightness: 5000 ÷ 2500 × 0.6 ÷ 2 = 1.2
Blue LED brightness: 5000 ÷ 2500 × 0.1 = 0.2
Brightness of each pixel is: 0.3 × 2 + 1.2 + 0.2 = 2.0 CD
Why use DVI display interface standard?
(1) DVI graphics card interface is a computer display interface complies with international standards;
(2) No need to open the case, you can easy to install;
(3) high memory, dynamic screen display ability;
(4) the ability of software and hardware compatible;
(5) to support all operating systems and application software, and display flexibility;
(6) mass production, low cost, easy maintenance.
Can you use the laptop screen control, and why?
Can not. Laptop graphics card is built-in, and connected to the control system can not be achieved, the current BOE now have a laptop with a DVI interface enables notebook control.
Full color using Nichia tube and the use of domestic pipe addition to price which is the difference?
(1) die: Nichia independent production company die, domestic pipe is generally used in the US or Taiwan company die;
(2) Package: Nichia autonomy package, no domestic production facilities, domestic tube packaging manufacturers more;
(3) Consistency: Nichia tube with a small batch of die wavelength difference, consistency, and relatively poor domestic tube integrity;
(4) Life: Nichia tube relatively long life, domestic pipe attenuation more serious;
Indoor module full color and full color SMD What's the difference?
(1) Light-emitting components: module full color display module is usually yellow-green, pure green module expensive; SMD full color screen is generally used pure green die;
(2) display: full color module pixel visual feel coarse, low brightness, likely to have mosaic; SMD full color good consistency, high brightness;
(3) Maintenance: easy to maintain full-color module, the entire module replacement cost is higher; SMD full color easy to maintain, repair and replacement can be a single lamp;
LED outdoor screen can stick with the table, and why?
Can not. Outdoor screen mounting structure demanding, SMD LED can not adapt to the harsh outdoor environment;
Outdoor screen brightness higher requirements, the current brightness SMD LED can not achieve the requirements of outdoor screen.
Outdoor screen relatively long production cycle Why?
(1) procurement of raw materials: LED lamp long procurement cycle, especially imported dies, order cycle takes 4-6 weeks;
(2) The production process is complex: the need to go through PCB design, housing production, Glue, adjusting the white balance and so on;
(3) structure demanding: generally box design, consider the wind, rain, lightning and so on.
How to help users select the appropriate display?
(1) display needs;
(2) visual distance, confirm Perspective;
(3) Screen resolution requirements;
(4) Installation environment requirements;
(5) the cost of control;
Display general aspect ratio?
Graphics screen: According to display content;
Video screen: usually 4: 3 or close to 4: 3; ideal ratio of 16: 9.
A control system capable of controlling the number of points?
A card communication screen: monochrome, color 1024 × 64
Communication screen B card: Monochrome: 896 × 512 color: 896 × 256
DVI color screen: 1280 × 768
DVI Full Color: 1024 × 512
What factors are generally considered sized screen?
- Screen size in the design, there are three important factors:
(1) display needs;
(2) floor space conditions;
(3) Monitor unit template size (indoor screen) or pixel size (outdoor screen).
-10 Kilowatts or more display devices should be added to buck starts.
- Communication Requirements: communication distance communication line length is defined.
- To install the communication lines to the models being used to install the display length of the standard communication lines.
- Prohibit communication lines and power line traces in the same line pipe.
- Installation Requirements: display installed around the level, after not allow dumping
- Lifting to install and down adjustment lever
- To replace the front wall mount forward off the hook
- Floor installation to add positioning studs.
Display power indicator and power requirements?
The average power consumption of the display is divided into consumption and maximum power consumption. The average consumption of electricity, also known work, is usually the actual power consumption. The maximum power consumption is started or full light when extreme situations, the maximum power consumption is an element AC power supply (diameter, switches, etc.) must be considered. Average power consumption is generally 1/3 of the maximum power consumption.
The display is a large sophisticated electronic equipment, safe use and reliable to work, the power input AC220V or AC220V power input terminal of the connected computer must be grounded.
NOTE: AC220V power input ground terminal computer has been connected to the computer chassis.
Display installation requirements?
Power requirements: power supply connection point should be within the size of the Screen
220V mains supply, FireWire 0 line grounding line;
380V electricity supply, three FireWire cable grounding line 10;
FireWire 0 line with the same conductor cross-sectional area;
10 kilowatts or more display devices should be added to buck starts.
Communication Requirements: communication distance communication line length is defined.
To model the installation of the display screen to install communication lines with the length of the standard communication lines.
Communication lines and power line traces is prohibited in the same line pipe.
Installation Requirements: The display installation about the level of dumping is not permitted after
To install lifting up and down adjustment lever
To replace the front wall mount forward off the hook
To add localization support floor mounting bolts.
Design and installation of outdoor screen what issues should be considered?
The main problem of outdoor screen is as follows:
(1) display installed outdoors, often sun and rain, wind and dust cover, poor working conditions. Electronic equipment is wet or damp can cause serious short circuit or even fire, causing malfunction or a fire, resulting in losses;
(2) The display may be due to strong electric magnetic attacks caused by lightning;
(3) the ambient temperature varies greatly. Work screen itself must have some heat, if the ambient temperature is too high heat and bad, the integrated circuit may not work correctly, or even destroyed, so that the display system does not work;
(4) wide audience, sight distance requirements far and wide field of vision requirements; ambient light changes, in particular, may be subject to direct sunlight.
For more specific requirements, outdoor display must be:
(1) Screen and the Screen and the building must be strictly water leak; Screen have good drainage measures in the event of a smooth water emissions;
(2) on the screen to install lightning protection equipment and buildings. Display body and cover good grounding, grounding resistance of less than 3 ohms, a large current caused by lightning discharge in time;
(3) installation of ventilation equipment cooling, so that the screen body internal temperature between -10 ℃ ~ 40 ℃. Screen behind the top of the installed fan, exhaust heat;
(4) The selection of the operating temperature between -40 ℃ ~ 80 ℃ industrial grade integrated circuit chip to prevent the winter temperature is too low to make the display can not be started. ;
(5) In order to ensure the long-distance visible in strong ambient light conditions, it must use ultra-high-brightness light-emitting diodes;
(6) display media use the new wide viewing angle tube, wide viewing angle, color pure, consistent coordination, life over 100,000 hours. Display outer packaging for the media with the most popular cover along the square tube, silicone seal, metal-free assembly; its exquisite appearance, durable, with anti-direct sunlight, dust, water, high temperature, anti-short circuit "Five Anti" feature.