What are the Common LED Displays in Traffic Hubs

In recent years, with the development of small-pitch LED display technology, LED display image quality more and more high-definition fine, and break the low bright high gray problem, which breaks the LED display can only be used in outdoor areas of the law, so LED display is also constantly used in subway stations, high-speed rail stations, airports, bus stations and other transportation hubs, including indoor engineering display field.

Introduction of LED Display Performance

LED display is now commonly used outdoor as well as indoor large screen display, how should we select a high performance LED display, LED lamp beads is the key core part that affects its display effect. In the encapsulation process requires high precision equipment to create a high-performance LED display products, the following to give you a brief introduction to the LED display are what performance.

1. Antistatic ability

LED is a semiconductor device, more sensitive to electrostatic, very easy to lead to electrostatic failure, so the anti-static ability of the LED display life is quite important. LED human electrostatic mode test failure voltage should not be less than 2000v.

2. Attenuation characteristics

General LED display is required to work for a long time, long time work will lead to its brightness decline and display color inconsistency, which is due to the LED device brightness decay caused by the LED brightness decay caused by the LED display screen brightness decline.

Red, blue and green LED brightness decay amplitude inconsistent LED display color inconsistency, that is, the phenomenon of display screen. A high quality LED display can be well controlled height attenuation amplitude, adjustable its brightness.

3. Brightness

The brightness of the LED display beads is a key factor in determining the height of the display. the higher the height of the LED, the greater the margin of the use of current, which is beneficial for saving power consumption and maintaining the stability of the LED.

The LED angles are different, if the chip has been set, the smaller the angle, the brighter the LED brightness, if the perspective of the display is small, we should choose 100 degrees of LED to ensure that the LED display enough The angle of view. Different point spacing and do not use the sight distance of the LED display, to be in the brightness, angle and price discretion, to find a balance.

4. View Angle

ILED lamp bead angle to determine the perspective of the LED display. At present, most of the outdoor LED displays use the horizontal angle of 120 degrees, the vertical angle of 70 degrees of elliptical SMD LED beads, indoor LED displays use vertical 120 degrees of SMD LED beads.

For example, the LED display on the highway selection of 30 degrees perspective of the round LED, while the vertical perspective of the LED display of high buildings require high, large perspective to reduce the brightness. So choose the perspective according to the specific use decision.

5. Loss of efficiency

Full-color LED display by tens of thousands or hundreds of thousands of groups of red, green and blue LEDs composed of pixel points, any one color LED failure will lead to the effect of the overall visual LED display.

6. Consistency

Full-color LED display consists of countless red, blue and green LEDs composed of pixels spelled out. Each color LED brightness as well as wavelength are decisive for the LED display brightness, white balance consistency, brightness consistency.

LED is angular, so the full-color LED display also has angle directionality, that is, when viewed at different angles, its brightness will increase or decrease, red, green and blue LED angle consistency will seriously affect the white balance consistency of different angles, affecting LED display video color fidelity, to do red, green and blue LED in different angles when the brightness of the change to match the consistency, to be in the package lens design, the choice of raw materials for scientific design, which depends on the technical level of the dry supplier. When the LED angle consistency is not good, the white balance effect of the whole LED display at different angles is very unpromising.

7. Life expectancy

LED display average life is 100,000 hours, as long as the LED device quality is good, the operating current is appropriate, heat dissipation design is reasonable, LED display production process is rigorous, LED device is one of the most durable devices in the LED display.

LED device price accounts for 70% of the proportion of the price of LED display, so the LED display is good or bad, LED device can be decided.

8. Size

The size of the LED device is also relevant and important, he directly affects the pixel distance of the LED display, that is, the resolution. Generally 5mm ellipsoidal lamp for p16 or more outdoor display, 3mm ellipsoidal lamp with dry p12.5, p12, p10 outdoor display.

In the case of constant segment spacing, LED device size increases, it can increase its display area and reduce the sense of grain.

What are Common LED Displays in Transportation Hubs at Present

01 Track area light box screen

Suitable for subway traveling track advertising display, the main audience for waiting passengers. Track area light box screen requires products with high pixel density, can be installed before maintenance, after EMC treatment, and has the ability to protect against moisture, water, corrosion, shock and other protection.

02 Station advertising screen

Suitable for advertising display on the subway booth level. Station advertising screens require higher contrast, refresh rate, grayscale and other display parameters because of the close viewing distance and will interact with consumers through QR code and somatosensory technology. The outdoor bus stop advertising screen, on the other hand, needs to be waterproof, high brightness, long life, able to adapt to the outdoor glare, beautiful, sturdy, conducive to heat dissipation, and easy to maintain and other characteristics.

03 Entrance Hall Advertising Screen

Suitable for advertising display in the entrance hall of subway stations. The product is usually wall-mounted and requires a wide viewing angle to meet the needs of consumers for close and wide viewing.

The modern subway city standard is complete hardware facilities and population scale, by adding human body induction device, the subway advertising display can even change from one-way communication to two-way interactive communication between consumers and LED screen.

04 Traffic information display

Generally set up in the highway section, mostly gantry, T-type, F-type, tunnel variable information board, can release various traffic information to the public in the all-weather environment, timely release to the driver of different sections and road traffic conditions, to ensure smooth road traffic and improve public traffic safety.

05 Road monitoring screen

1, traffic command and dispatch center display is the monitoring center computer through the communication network to implement remote control, transmission and display the road speed limit mileage or brief traffic information, to prompt the vehicle speed limit, to ensure driving safety.

2, road monitoring display is mainly set up in the monitoring center, mainly to help traffic command management personnel to traffic violations, traffic jams, traffic accidents and other unexpected events to make timely and accurate judgment, to facilitate management personnel to make command adjustment strategy, to ensure the safety and smooth flow of the road.

Application scene features

• 1. High contrast, high refresh rate, high grayscale, delicate picture, good color reproduction.
• 2.Seamless splicing, shape splicing can be realized.
• 3. Support 7*24 hours uninterrupted work.
• 4. Support traffic information release system.
• 5. Environmental protection and energy saving, adapt to all-weather work.
• 6. Low power consumption and long service life.