Comparison of LED Screen Selection and Rear Projection LCD PDP

With the development of digitization and informatization, large screens have been used more and more in various situations, and various display technologies have also emerged. From the early CRTs to the current LCD displays, PDPs, FEDs, and DLPs, the flat panel display technology has shown a trend of diversification. The following will discuss the selection of LED screens and their comparison with rear projection, LCD, and PDP.

One, led screen is suitable for its own use The following list of two simple questions, can help you determine whether the LED screen is suitable for your specific application:

1. What is the brightness of the installation environment you choose?

If the environment is very bright, please choose LED or rear projection.

2. How big is your display size?

If you want a large, seamless display that is 60 inches or larger, you can choose to have a front, rear, or LED display.

Two LED video displays can provide maximum return on investment for outdoor signage and advertising markets. The modern advertising network system is entering a new and unknown area, which is due to the large number of LED display applications. The acceleration of the speed of modern information networks has enabled the rapid and widespread dissemination of video. More and more application cases have shown that streaming video videos with acceptable display quality are now technically mature.

The development of the Internet has made video broadcast networks even across the ocean. With just a press of a button, the latest news or content can be displayed on the screens of the entire world, and its influence and spread reach the limits of the past.

For typical indoor locations, the use of flat panel displays and projectors is acceptable. But in some places, these technologies can not provide the required display quality, but bright indoor and any outdoor environment are the fatal nemesis of these technologies.

Below we will explain why LED can provide the best solution. In most cases, it is how to solve the above problem. At the same time, LED is not a panacea. Selecting and designing LED screens should follow some good rules and techniques.

Third, we will first examine different display technologies, understand their applicable environments, and the reasons for their application. Projection projection is one of the earliest display technologies. With the development of advanced deflection technology, today's projection technology uses DLP and LCD display instead of celluloid film to display content on the projection screen. Today, the use of rear projection is more common than the previous one.

The distinctive feature of the front projection is that it can support large screen displays that can accommodate a large number of viewers.

a. In a dark environment, it performs well.

High resolution

Low contrast - displays content with a white reflective surface;

b. The lamp life is shorter, so the maintenance costs are higher.

Rear projection module screen size is limited to 50-80 inches, with multiple projectors and screens can form a rear projection wall, 10 years ago this is a very stylish device, is still used in the control room display .

The advantages and disadvantages of rear projection:

In a normal indoor light environment, the display effect is good;

High resolution

Due to the color matching problem of each rear projection block, the rear projection size is limited;

About a few millimeters of margin between each rear projection block is more obvious, hindering its application as a large screen in some occasions.

From the above analysis, it can be seen that in a bright environment, the effect of the projection screen is unsatisfactory, and it is better to use an LED screen.

2. Plasma display:

Plasma screens have been available for nearly a decade and have revolutionized the way we view information in a business environment. Its slim shape and large-size display brings us the feeling that a clunky CRT display can never be done.

The breakthrough in plasma technology has enabled shopping malls, airports, and train stations to display their information and ideas in a more comprehensive and effective way. It is also one of the main tools of all information disclosure networks.

The plasma screen on the market is generally 60 inches (if you have enough money, you can buy an 80-inch ultra-large plasma screen), and basically have a higher resolution. Its advantages and disadvantages are:

a. High resolution

b. Low brightness, only 400 nits;

c. Shorter service life, in some cases less than two years, and no effective solution;

d. Need to endure picture burning.

Therefore, the LED screen is superior to its high brightness and long service life.

3. LCD display The LCD display technology appeared in the late 1960s and has undergone many changes during the digital visual revolution in the late 1970s and early 1980s. In recent years, the LCD display has been closely following plasma in terms of size, but now it is found that it is invading the market share of plasma in the large flat screen market.

The main advantages of LCD displays are far better than the long-term stability of plasma. Businesses that have made large-scale investments in the LCD display area are making their performance look better than the promotional materials, but it is clear that the facts are somewhat less than satisfactory. The main problem with LCD displays is how fast the liquid crystals respond when playing video, and how fast they can distort and recover. Of course, the response speed has been greatly improved in recent years, but it is still not good enough. Its advantages and disadvantages are as follows:

a. High resolution

b. Large size (more expensive than plasma);

c. Long service life and high stability

d. Lower brightness, 400 nits.

In contrast, LED screens respond faster and have higher brightness when playing video.

The advantages of four LED display technology LED screens have appeared since the 60's, but it was not until the mid-1990s that full-color screens appeared. The price of this technology has declined greatly in recent years, and the resolution has also been greatly improved.

The LED screen is mainly used in places where more people watch, and can provide a seamless screen of almost any size, from 1 square meter to a large size you can imagine.

The minimum LED screen price for ultra-high resolution 3mm pixel dot matrix products is still very expensive, so 6mm dot matrix pixels are the most widely used high resolution products.

Plasma pixel arrays can be less than 0.5 millimeters, so LED screens cannot be compared to plasma and LCD screens in resolution, but they will not be used in the same way, for example, will not be used for realistic detailed text information. .

For video, LED screens perform well at low resolution. In fact, you usually see the resolution of the LED screen is similar to the resolution when you look at the computer monitor.

But LED displays do have an outstanding performance, brightness. The brightness of LED screens is generally 10 times that of other display technologies. Because of this, they can be installed anywhere that other screens cannot be installed, including bright indoor environments and of course outdoor ones. Its characteristics are:

1 large screen display - from 1 to 500 square meters can effectively control the budget;

2 High brightness - can be viewed directly in the sun, is the only display technology to achieve the desired picture at a reasonable price;

3 Modular design - easy to maintain;

4 The longest service life in all display technologies - no major changes in performance over five years.