How to choose LED electronic display screen

Abstract: Due to the comprehensive advantages of LED display screens such as low price, low consumption, energy saving, high brightness, and excellent display effects, various large-scale outdoor media, advertising, stadiums, public transportation, and concerts The application demand for LED electronic displays in other fields will continue to grow rapidly. How to choose LED electronic display? So what factors should be considered when purchasing a display screen? There are 10 points in total. The first point is: you need to know the length-to-width ratio of a general display screen... The following will introduce you to the purchasing tips of LED display screens. Types of LED display screens

1. LED transparent screens

LED transparent screens, as the name suggests, are display screens with very good transparency. They are mainly installed behind glass. Transparent LED displays have been developed to this day. Many types of products have also been derived, including window LED transparent screens, canopy LED transparent screens, glass curtain wall LED transparent screens, etc. Transparent screens can be installed where there is glass.

2. Floor tile LED display screen

The installation of LED display screen is not limited to installation on the wall. The use on the ground has also been regularized. Floor tile LED display screen is used by many Used in hotels, shopping malls, bars and many other occasions. The biggest advantage is that it is waterproof and moisture-proof and has strong earthquake resistance.

3. Canopy LED display screen

Canopy LED display screen is a screen installed on the ceiling to create a broader effect for the entire space. Canopy LED display screen is generally used in hotels , bars, KTV and other places.

4. Special-shaped LED electronic display screen

Special-shaped LED display screen is also called creative LED display screen. Conventional LED display screen is boxy and regular, and the installation Position restrictions often require the shape of the screen to be irregular, such as circles, triangles, semicircles, arcs, cylinders, cones, etc. The production of these products requires redesigning the circuit board, re-prototype design and debugging. The DJ booth in the bar is the most used.

5. Interactive LED display screen

The current LED electronic display screen has broken the rigid function of displaying video, and can now achieve human-screen interaction and increase the entertainment effect.

6. Glass plank road LED display

The glass plank road is made of tempered glass elevated on the cliff to form a suspended transparent glass plank road for tourism and sightseeing. The tempered glass load safety factor of the glass plank road is comparable to that of traditional Made of reinforced concrete, tourists no longer have to worry about safety issues, and it is also the basis for the commercialization of the glass plank road. Nowadays, there are more and more application areas for LED display screens on glass plank roads, such as Qingyuan Niuyuzui Glass Bridge, Wuzhishi Glass Stack, Guishan Scenic Area Glass Suspension Bridge, Tianmen Mountain Glass Plank Road, etc.

LED display purchasing

When purchasing LED display screens, many customers do not know how to purchase cost-effective products, and many users also collect and inquire about this aspect online. information, but never get a satisfactory answer. So what factors should be considered when purchasing a display screen?

First point: What is the aspect ratio of a general display screen?

1. Graphic and text screen: determined according to the displayed content;

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

Second point: What factors are generally considered in the size design of the display screen?

1. The need to display content;

2. Site space conditions;

3. Display unit template size (indoor screen) or pixel size ( outdoor screen).

The third point: Do you need to know the number of points that the control system can control?

Communication screen A card: single color, dual color 1024×64

Communication screen B card: single color: 896×512 dual color: 896×256

DVI Dual-color screen: 1280×768

DVI full-color screen: 1024×512

Point 4: What are the display power consumption indicators and power requirements that need to be understood?

The power consumption of the display screen is divided into average power consumption and maximum power consumption.

Average power consumption, also known as working power, is the actual power consumption in normal times. The maximum power consumption is the power consumption during extreme conditions such as startup or full brightness. The maximum power consumption is a factor that must be considered for AC power supply (wire diameter, switch, etc.). The average power consumption is generally 1/3 of the maximum power consumption. The display screen is a large precision electronic device. For safe use and reliable operation, its AC220V power input terminal or the AC220V power input terminal of the computer connected to it must be grounded.

Point 5: What are the differences between indoor module full-color screens and SMD full-color screens?

1. Light-emitting part: The display module of the module full-color screen is generally yellow-green, and the pure green module is more expensive; the SMD full-color screen generally uses a pure green tube core;

2. Display effect: The module full-color screen has thicker pixels, lower brightness, and is prone to mosaics; the patch full-color screen has better consistency and higher brightness;

3. Maintenance: The module is fully Color is difficult to maintain, and the cost of replacing the entire module is high; while full-color SMD is easy to maintain, and single lamps can be repaired and replaced;

Point 6: Why is the production cycle of outdoor screens relatively long?

1. Raw material procurement: The procurement cycle of LED lamps is long, especially imported tube cores, and the ordering cycle takes 4-6 weeks;

2. The production process is complex: PCB design is required , cover production, glue filling, white balance adjustment, etc.;

3. Strict structural requirements: Generally, it is a box design, and windproof, rainproof, lightning protection, etc. need to be considered.

Point 7: What are the factors that need to be considered for the screen area allowed by the venue?

1. The relationship between effective viewing distance and actual site size;

2. Pixel size and resolution;

3. Area estimation based on unit;

4. Screen mechanical installation and maintenance operation space;

5. The impact of screen inclination on distance;

Point 8: Need to understand the ambient brightness What are the brightness requirements for the screen?

General brightness requirements are as follows:

1. Indoor: gt; 800CD/M2

2. Semi-indoor: gt; 2000CD/M2

3. Outdoor (sit south and face north): gt; 4000CD/M2

4. Outdoor (sit north and face south): gt; 8000CD/M2

After determining the brightness and dot density How to calculate the brightness of LED lights under the required conditions?

The calculation method is as follows: (Take two red, one green, and one blue as an example)

Red LED light brightness: brightness (CD)/M2÷points/M2×0.3÷2

Green LED light brightness: brightness (CD)/M2÷points/M2×0.6

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

For example: 2500 points density per square meter, 2R1G1B, brightness requirement per square meter is 5000CD/M2, then:

The brightness of the red LED light is: 5000÷2500×0.3÷2=0.3

The brightness of the green LED light is: 5000÷2500×0.6=1.2

The brightness of the blue LED light is: 5000÷2500×0.1=0.2

Per pixel The brightness is: 0.3×2 1.2 0.2=2.0CD

Point 9: What are the playback effects that need to be considered?

1. Text display: depends on the text size and resolution requirements;

2. Ordinary video display: 320×240 dot matrix;

3. Digital standard DVD display: ≥640×480 dots;

4. Complete computer video: ≥800×600 dots;

Point 10: Need to understand the design of outdoor display screens And installation issues?

1. The joint between the screen and the building must be strictly waterproof and leak-proof; the screen must have good drainage measures so that it can be drained smoothly in the event of water accumulation;

2. When displaying Install lightning protection devices on screens and buildings.

The main body and shell of the display screen should be well grounded, and the ground resistance should be less than 3 ohms, so that large currents caused by lightning can be discharged in time;

3. Install ventilation equipment to cool down so that the internal temperature of the screen is between -10°C and 40°C between ℃. An axial flow fan is installed above the back of the screen to dissipate heat;

4. Use industrial-grade integrated circuit chips with operating temperatures between -40°C and 80°C to prevent the display from being unable to start due to low temperatures in winter. .

5. In order to ensure long-distance visibility under strong ambient light, ultra-high brightness light-emitting diodes must be used;

6. The display medium uses a new wide-angle tube with a wide viewing angle. , pure colors, consistent and coordinated, with a lifespan of more than 100,000 hours. The outer packaging of the display medium is the most popular square cylinder with a shielded edge, silicone seal, and no metal assembly; its appearance is exquisite and beautiful, sturdy and durable, and has the characteristics of protection against direct sunlight, dust, water, high temperature, and circuit short circuit "Five defenses" features.