How to select LED display?
Author:Al-Jadaan Time:2021-06-09 15:44 Browse(402)
Hello, the choice of LED display should be combined with its own needs, site restrictions, investment and many other factors. For example, whether the display screen is used indoors or outdoors, whether the main purpose of the display screen is to display text, simple pictures and text, or to play various video signals, moving networks, images and text, etc., the viewing distance of the display screen and the control mode (synchronous control, asynchronous control or wireless control) to be adopted are very important factors.
Hello, the choice of LED display screen should be based on its own needs, site restrictions, investment and many other factors.
for example, whether the display screen is used indoors or outdoors.

How to select LED display?

the main purpose of the display screen is to display text, display simple pictures and text, or play various video signals, mobile networks, images and text, etc, The viewing distance of the display screen and the control mode (synchronous control, asynchronous control or wireless control, etc.) to be adopted are very important factorsGenerally speaking.
if the image requirements are high and the visual distance is close, choose the dual primary color or full-color display screen with high point density. If the text playback volume is large, choose the specification with low point density.
in addition.
we should also choose the full-color, dual primary color or monochrome display screen according to the investment situation, and choose different frame materials according to the decoration situation, Different control methods should be selected according to the use characteristicsSpecifically,
the following points should be paid attention to when selecting LED display screen.
the new wide viewing angle tube should be selected as far as possible.
it has wide viewing angle.
the color is pure and consistent, and the service life is more than 100000 hours.
the selection of external package for LED display screen.
at present, the most popular external package is square cylinder with shading edge.
silica gel seal, no metallization assembly.
its appearance is exquisite and beautiful.
it is firm and durable, It has the five prevention features of direct sunlight, dust, water, high temperature and short circuit.
it should be based on the characteristics of different LED display screens.
combined with the actual needs of users, select the appropriate display screen.
according to the characteristics of different LED display screens(1) It can be used to guide the passenger flow at the exit of stations, docks, large markets and at the entrance of the elevator entrance ¢ 5.0 monochrome display screen.
it has the advantages of clear font, low price and cluster control.
it has the advantages of low cost and low cost(2) For banks, shopping malls and other occasions to display the corporate image, advertising and other applications.
this paper introduces the concept of "corporate image" and "corporate image"It can be used because of its low price ¢ 3.75 dual primary color display.
if the display effect is required to be good.
can be used ¢ 5 full color display(3)
can be used for large areas such as halls ¢ 5 dual primary color display.
if the display effect is required.
can be used ¢ 10 full color display(4) For the function definition of service windows in business halls such as bank, post office, electric power, etc.
can be used ¢ 3 or ¢ 5.
it can change the service function of the window at any timeThe LED large screen display can be divided into indoor and outdoor according to the use occasions.
it can be divided into single color, two-color and three primary colors according to the color.
the outdoor display should have higher brightness.
it should also have better visual effect in the sunlight. Due to the large outdoor sight distance, the LED straight diameter is relatively larger, and it should be able to be used all day, with protection against wind, lightning, rain and mildew, The diameter of indoor screen is smaller than that of LED, generally only 3-5mm.
monochrome screen is red or green, which is usually only used for text display.
two color screen is red and green, which can have 65536 colors and 256 gray levels. Three color screen can reach 16m true color and 256 gray levels.
pixel density can reach tens of thousands of points per square meter.
monochrome screen has relatively high density, while three color screen is relatively low, Because each pixel needs three colors.
the quality factors of the display screen include viewing angle, brightness, uniformity, refresh speed, nonlinear correction, etc.
according to the brightness and color of the screen.
the power consumption varies greatly, from more than 100 watts per square meter to more than 1000 watts per square meterMainly on the above points.
or you can refer to the information page link in Baidu    ,I hope my answer can help you.
LED display procurement knowledge pointsWhat are the brightness requirements for the screen?The general brightness requirements are as follows:(1) Indoor:> 800cd / m2(2) Semi indoor:> 2000cd / m2(3) Outdoor (south facing north):> 4000cd / m2(4) Outdoor (facing south):> 8000CD / m2What are the factors to consider the screen area allowed by the user's site?(1) The relationship between effective sight distance and actual site size;(2) Pixel size and resolution;(3) Area estimation based on unit number;(4) Screen mechanical installation and maintenance operation space;(5) The influence of screen tilt angle on the distance.
results show that the screen tilt angle has great influence on the distanceWhat are the playback effects that users need?(1) Text display: depending on the text size and resolution requirements;(2) General video display: 320 × 240 lattice;(3) Digital standard DVD display: ≥ 640 × 480 lattice;(4) Complete computer video: ≥ 800 × 600 dot matrix;What is the brightness requirement of red, green and blue in white composition?The contribution of red, green and blue to the quality of white is different.
the fundamental reason is the visual network of human eyesAfter a lot of experimental tests, the following approximate proportions are obtained.
for reference design:The simple ratio of red, green and blue is 3:6:1The accurate brightness ratio of red, green and blue is 3.0:5.9:1.1Why do high-end full-color displays use pure green tubes?In the actual production of LED display screen,Three primary colors with high luminous efficiency and rich and bright colors should be selectedThe area of the color triangle in the chromaticity diagram is as close as possible to the tongue shaped spectral color curve to meet the requirements of rich color and sufficient brightness. The top of the tongue shaped curve is 515nm wavelength light, so the pure green LED with wavelength close to 515nm is selected for high-end LED display screen, such as 520nm, 525nm or 530nm wavelength lightHow to calculate the brightness of a single tube under the condition that the requirements of brightness and point density are clear.
how to calculate the brightness of a single tube?The calculation method is as follows: (take two red, one green and one blue as examples)Brightness of red LED: brightness (CD) / m2 ÷ Points / m2 × zero point three ÷ twoBrightness of green LED: brightness (CD) / m2 ÷ Points / m2 × zero point sixBrightness of blue LED: brightness (CD) / m2 ÷ Points / m2 × zero point oneFor example, if the density of 2500 dots per square meter, 2R1G1B, and the brightness of 5000 CD / m2 are required, then:The brightness of red LED is 5000 ÷ two thousand and five hundred × zero point three ÷ 2=0.3Green LED brightness: 5000 ÷ two thousand and five hundred × 0.6=1.2The brightness of blue LED is 5000 ÷ two thousand and five hundred × 0.1=0.2Brightness per pixel: 0.3 × 2+1.2+0.2=2.0 cdWhy choose DVI display interface standard?(1) The interface of DVI display card is in line with the international standard of computer;(2) It is easy to install without opening the chassis;(3) High memory,The ability of dynamic picture display is strong;(4) Strong compatibility between hardware and software;(5) Support all operating systems and application software, flexible and convenient display;(6) Mass production, low cost and easy maintenance.
the system is easy to operateCan the display be controlled by notebook.
why?No.
the graphics card of the notebook computer is built-in.
it is unable to connect with the control system. At present, BOE has a notebook with DVI interface, which can realize the control of the notebook.
there is no way to connect with the control systemWhat's the difference between using Japanese tube and using domestic tube except for the price?(1) Die: the die is produced by Japan Asia company.
generally, the die made in China is made in America or Taiwan;(2) Packaging: Japan Asia company independent packaging, no domestic production plant, domestic tube packaging manufacturers more;(3) Consistency: the wave length phase difference of the same batch of Riya tubes is small and the consistency is good, while the consistency of domestic tubes is relatively poor;(4) Service life: the service life of Riya tube is relatively long, and the attenuation of domestic tube is relatively serious;What's the difference between indoor module full color screen and patch full color screen?(1) Light emitting part: the display module with full color screen is generally yellow green, and the pure green module is more expensive; The chip full-color screen generally uses pure green chip;(2) Display effect: the visual feeling of the pixels on the full-color screen of the module is thick, the brightness is low, and the mosaic phenomenon is easy to occur; The uniformity and brightness of the whole color display are good;(3) Maintenance: full color module is not easy to maintain, and the replacement cost of the whole module is high; The patch is full color, easy to maintain, and can be replaced by single lamp;Why is the production cycle of outdoor screen longer?(1) Raw material procurement: LED lamp procurement cycle is long,Especially for imported pipe cores, the order period is 4-6 weeks;(2) The production process is complex: PCB design, shell production, glue filling, white balance, etc;(3) Strict structural requirements: generally, it is designed as a box, and wind, rain and lightning protection should be considered.
the design of the box is simple and reliableHow to help users choose the right display?(1) The need to display content;(2) Confirmation of visual distance and visual angle;(3) Screen resolution requirements;(4) Requirements of installation environment;(5) Cost control;What is the length width ratio of the display screen?Graphic screen: determined according to the displayed content;Video screen: generally 4:3 or close to 4:3; The ideal ratio is 16:9How many points can a control system control?Communication screen a card: monochrome, bicolor 1024 × sixty-fourCommunication screen B card: monochrome: 896 × 512 two color: 896 × two hundred and fifty-sixDVI dual color screen: 1280 × seven hundred and sixty-eightDVI full color screen: 1024 × five hundred and twelveWhat factors are generally considered in the size design of display screen?-There are three important factors in the design of screen size.
:(1) The need to display content;(2) Space condition of the site;(3) The display unit template size (indoor screen) or pixel size (outdoor screen).
the display unit template size (indoor screen) or pixel size (outdoor screen) is larger than the display unit template size-The display screen above 10 kW should be equipped with step-down starting equipment-Communication requirements: communication distance is defined by the length of communication line-The communication cable should be installed according to the length standard of the communication cable used for the model of the installed display screen.
the communication cable should be installed according to the length standard of the communication cable used for the model of the installed display screen-It is forbidden to run the communication line in the same tube as the power line.
the power line is not allowed to run in the same tube-Installation requirements: the display screen should be installed horizontally on the left and right.
backward tilt is not allowed-Lifting should be equipped with up and down regulating rod-Before the installation of the wall hanging, the forward tilting hook should be installed-The positioning support bolt should be added for the floor mounting.
the positioning support bolt should be added for the floor mountingWhat are the display power consumption index and power requirements?The power consumption of display screen can be divided into average power consumption and maximum power consumption.
the average power consumption is also called working power consumption.
it is the actual power consumption at ordinary times.
the maximum power consumption is the power consumption in extreme conditions such as starting or full lighting.
the maximum power consumption is the factor that must be considered in AC power supply (wire diameter, switch, etc.).
the average power consumption is generally 1 / 3 of the maximum power consumption.
the average power consumption is generally 1 / 3 of the maximum power consumptionThe display screen is a large precision electronic equipment.
in order to use it safely and work reliably, the AC 220 V power input terminal of the display screen or the AC 220 V power input terminal of the computer connected with the display screen must be grounded.
the display screen is a large precision electronic equipmentNote: the AC220V power input grounding terminal of the computer has been connected with the computer case.
the power input grounding terminal of the computer has been connected with the computer caseInstallation requirements of display screen?Power supply requirements: the power supply wiring point should be within the size of the screen220 V power supply.
live line 0 line grounding wire;380V municipal power supply, three live wires and 10 wire grounding wire;The cross-sectional area of live wire and zero wire is the same;The display screen above 10 kW should be equipped with step-down starting equipmentCommunication requirements: communication distance is defined by the length of communication lineThe communication cable should be installed according to the length standard of the communication cable used for the model of the installed display screen.
the communication cable should be installed according to the length standard of the communication cable used for the model of the installed display screenIt is forbidden to run the communication line in the same tube as the power line.
the power line is not allowed to run in the same tubeInstallation requirements: the display screen should be installed horizontally on the left and right.
backward tilt is not allowedLifting should be equipped with up and down regulating rodBefore the installation of the wall hanging, the forward tilting hook should be installedThe positioning support bolt should be added for the floor mounting.
the positioning support bolt should be added for the floor mountingWhat should be considered in the design and installation of outdoor screen?The main problems of outdoor screen are as follows:(1) The display screen is installed outdoors.
it is often exposed to the sun, rain, wind and dust, and the working environment is harsh.
if the electronic equipment is wet or seriously affected by moisture, it will cause short circuit or even fire.
it will cause failure or even fire, resulting in losses;(2) The display screen may be attacked by strong electricity and strong magnetism caused by lightning;(3) The environment temperature changes greatly.
when the display screen works, it will generate certain heat.
if the environment temperature is too high and the heat dissipation is poor, the integrated circuit may not work normally, or even be burned, so that the display system cannot work normally;(4) Wide audience, long sight distance and wide field of vision are required; The ambient light changes greatly, especially the direct sunlightFor the above special requirements.
outdoor display must:(1) The screen and the joint between the screen and the building must be strictly waterproof and leak proof; The screen body should have good drainage measures, once the ponding occurs, it can be discharged smoothly;(2) Install lightning protection devices on the display screen and buildings.
the main body and shell of the display screen shall be well grounded.
the grounding resistance shall be less than 3 ohm, so that the large current caused by lightning can be discharged in time;(3) Install ventilation equipment to reduce the temperature, so that the internal temperature of the screen is between - 10 ℃ and 40 ℃.
install axial flow fan above the back of the screen.
exhaust heat;(4) Industrial grade IC chips with working temperature between - 40 ℃ and 80 ℃ are selected,Prevent the display screen from starting when the temperature is too low in winter.
;(5) In order to ensure long-distance visibility under strong ambient light.
ultra high brightness LED must be selected;(6) The display medium is a new wide viewing angle tube, with wide viewing angle, pure color, consistent coordination, and service life of more than 100000 hours.
the external packaging of the display medium is the most popular square cylinder with shielding edge at present.
silicone sealing, no metallization assembly; Its appearance is exquisite and beautiful, firm and durable, with the characteristics of direct sunlight, dust-proof, water-proof, high temperature and short circuit protectionOur company specializes in the production of LED automatic filling machine; LED module glue filling machine; Led full-automatic soft light strip glue filling machine.
LED light strip pasting machine and light strip processing, welcome to contact us! Chen Sheng (my 163 blog: LED Bolin).
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