LED Video Displays: Characteristics And Technologies

Today we tend to take LED video displays for granted. Indeed, they became common features in our towns and we mostly pay attention to their outward quality parameters. we believe time has come to spell out major technical principles of modern LED video displays, those principles that ultimately ensure what millions of people see on screens every day.

Modern LED video display is a complex system with enormous number of components. The image quality and operational parameters depend on the quality of each of those components as well as on the functionality of screen control system.

• The following LED video display characteristics are essential from the point of view of image quality:
• LED video display resolution (so called spatial resolution), in LED video displays it is closely related to distance between pixels or pitch size;
• Maximum brightness (measured in Nits);
• Dynamic brightness range understood as the number of brightness levels that the screen is capable to support (sometimes it is also called radiometric or energy resolution);
• Frame rate measures how often a video source can feed an entire frame of new data to a display, the frequency of frames changing per second (fps) (sometimes referred to as temporal resolution);
• Refresh rate (measured in Hz) is the number of times in a second that a display hardware draws the data, or refreshes the frame (also referred to as temporal resolution);
• Spectral resolution: Color images distinguish light of different spectra. Multi-spectral images resolve even finer differences of spectrum or wavelength than is needed to reproduce color. The term determines how many spectral components create an image;
• Color uniformity throughout the screen;
• White balance and possibility of fine-tuning it;
  Linear perception of brightness – subjective quality of image quality that determines how the human eye distinguishes between adjacent brightness levels both on dark and bright parts of the screen;
• Image contrast;
• Image quality determined by the viewing angle.
• Apart from the image quality it is important to consider some key operational parameters of the LED video display:
• Feedback or monitoring system of screen condition;
• Mature software and comprehensive control system that allow to scaling of the system and construction of LED and LCD video display networks with remote control via the Internet through in-built informational security subsystem;
• Level of electromagnetic radiation in the form of electromagnetic interference (EMI) from the screen.

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LED billboards a hit in Russian cinemas

In Russia, a cinema chain has taken advantage of LED display billboards in order to advertise the menu of products which are available from its concessions stand.

Formula Kino cinemas across the capital of Moscow and beyond were kitted out with the LED display billboards.

The billboards were put up in more than 14 locations and were used to replace the standard printed menus which had previously hung in their place. The digital content made available by the LED billboards will let customers know about the latest deals and available items in an inventive manner, rather than they having to strain their eyes at the bland predecessors.

Formula Kino spokesperson Andrey Alikberov, said that the cinema chain had decided to upgrade to the LED billboards because of the effectiveness of the technology. The ability to make alterations to the information which the billboards are displaying in real time, without any added expense, is seen as key to their success.

The LED billboards are controlled remotely, which according to Mr Alikberov is another advantage. The modernity of the designs of the billboards combined with the eye catching visual impact they have on visitors to the cinema, helps the chain to seem more forward-thinking and innovative than its rivals, he said.

Formula Kino is hoping to expand the use of LED billboards to all of the cinemas which it operates in Russia in the near future. Mr Alikberov said that the billboards would eventually be able to offer interactive features for consumers to use, although he did not expand to explain precisely what this might involve.

The use of LED display billboards to advertise dynamic menu content is becoming more common as an alternative to the static options, which were limited by past technology.

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The Ingress Protection Of LED Display

We usually see the ‘IP rating’ or Ingress Protection in the LED Display product advertising brochures, generally it defines the protection degree that the LED Display product should meet for the outdoor or long-time usage.

LED screens must be able to work 24 hours a day and 7 days a week and withstand extremely bad weather. For manufacturers it is required that the LED screens meet the criterion for outdoor LED screens IP65, and for indoor LED screens IP20. So what do these criterions mean? And what does IP65 and IP20 stand for?

The IP code (or International Protection Rating, sometimes also interpreted as Ingress Protection Rating) consists of the letters IP followed by two digits and an optional letter.

As defined in international standard IEC 60529, it classifies the degrees of protection provided against the intrusion of solid objects (including body parts like hands and fingers), dust, accidental contact, and water in electrical enclosures of the LED display screens. The standard aims to provide users more detailed information than vague marketing terms such as waterproof.

Let’s take some examples for detailed explanations:

Front Outdoor LED Screens: IP67

The first digit indicates the protection against dust. And "6" means Dust Tight, which means no ingress of dust and complete protection against contact. The second digit indicates the protection against liquids. And "7" means ingress of water in harmful quantity shall not be possible when the enclosure is immersed in water under defined conditions of pressure and time (up to 1 m of submersion).

Back Outdoor LED Screens: IP55

The 2 digits indicate the same parameter with above. But the letters are different. And the first "5" means Dust Protected: Ingress of dust is not entirely prevented, but it must not enter in sufficient quantity to interfere with the satisfactory operation of the equipment; complete protection against contact. The second "5" means: Water projected by a nozzle against enclosure from any direction shall have no harmful effects.

According to the "The General Criterion for LED Displays": Indoor LED displays should be IP20+, Outdoor LED displays should be IP33+

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LED display panel,the most luminous star at the Milan World Expo 2015

The 42th World Exposition (EXPO 2015) is being hosted by Milan, Italy, the opening took place on 1 May 2015 and the expo will close on 31 October 2015. "Feeding the Planet, Energy for Life" is the theme of the Expo, this is the first time in history to choose food as the theme, there is food from different countries on display, in view of seeking the solution of the food needs for up to 9 billion people till the year 2050. http://www.esdled.com/

Expo 2015 is an international exhibition of great influence and long history, which is held by host country’s government or authorized departments. Exhibitors show their up-to-date achievements on culture, technology, industry fields that brought deep and positive influence on life. The characteristics of Expo are of long-period, large scale, widely participating and far-reaching influence.

The World Expo is a unique forum, which encourages people on creativity and active participation. The combination of scientific and sentimental elements will contribute for the emergence of new concepts, new ideas, new technology in the development of human. Therefore, the World Expo is known as the "Olympic" event of the world economy, science, technology and culture.

Eastar LED display also attends the high-profile event in representation of China, becoming the shining star at this Milan Expo. Let’s have a glimpse of Eastar LED screen at the Milan World Expo together.

At the entrance of the Expo, all the screen is Eastar LED screen Dazzle series P5.925.

In the public place, Dazzle P5.925 again, there are 35 screens applied in total.Netherland Pavilion, all the screens are from Eastar, Mini P3.75 of 200 sqm.

Argentina Pavilion, there are Mini P3.75 again from Eastar.

Each World Exposition is highly valued by the host country and the participating countries, the host country has exquisite requirements on the site construction; each participating countries also attaches great importance on the preparation of attending the show, as the pavilions are directly related to the country's image to the world, therefore it is usually the national government that in charge of the affairs of the exposition, having high demands of the pavilion construction. Under such high requirements, Eastar LED screen not only gains recognition of the World Expo host country Italy, but also becomes the main LED screen supplier; and Eastar is the only supplier for Netherlands and Argentina on LED screen, Eastar becomes the most luminous star on the Expo.

LED Advertising Displays Colorful Advertisements for Your Business

Advertising LED displays offer one of the easiest, fastest and impressive ways to make an impact, encouraging more customers to come through the door. Advertising LED displays empower many businesses and business owners to cultivate their target market more effectively, quickly transitioning viewers from potential customer to first-time customer to repeat customer by creating a memorable, attractive, and informative advertising narrative over time.http://www.esdled.com/

LED display board is great for getting the attention of many of your potential customers. It also allows dynamic updating, which makes it easy for businesses with daily specials to display the correct item with minimal effort or human intervention. Your customers can be kept informed by a constantly-updated LED display board, are more likely to see relevant advertising and choose your business instead of your competitors.

Advertising LED displays are specially constructed to release a large number of photons outward and also fit more easily into modern electronic circuits. The intensity of the lights and colours is what really attracts most people to these LED displays and LED signs. They can be easily installed and quite easy to maintain.

Advertising LED displays also let you check the status of your order, which would give you the certainty and clearness, knowing the right status of the service that you have already paid for. Advertising LED displays also offer numerous advantages over other lights; it lasts longer, consumes less energy and is smaller than many other traditional light sources.

You can share important information about upcoming special guests or bands through Advertising LED displays. Advertising LED displays are widely used in various industries including manufacturing, distribution, trading, different organisations, including schools, colleges and even in religious institutions.

With the help of advertising LED displays, a large number of message to message changes can be easily arranged with the help of the computer. It serves quite well in any environment where information needs to be effectively and efficiently conveyed to any number of people.

Advertising LED displays have pre-designed panels and measures standards, once you own your screen advertising, you have the alternative to change the LED display, depending on how long you are willing to rent it, in that way the returns of investment will considerably improve.

The main advantage of advertising LED displays is efficiency. They can provide a complete solution for your visual display needs and increase the market value to a great extent. The content and message of any type of advertisement can well be communicated to the customers with this technology, which is not the case with other signs. Advertising LED displays are the best option as they are highly flexible in effectively communicating the changes, as you sometimes, need to change your advertisements and services on daily basis to retain your position in the industry.

In addition to all that, it is less expensive when compared to other traditional advertisements. An attractive and informative LED signage enables many businesses to communicate the value of their products more effectively, which will ultimately be converted into additional sales.

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