Can the advantages of LED display highlight the film market?

LED screens have obvious advantages in entering the theater

Faced with the relative blankness of the film market, does the LED large screen have enough advantages to compete with the traditional cinema playback equipment, and plug into the movie broadcasting market?

As a novel electronic dynamic graphic dot matrix display, LED large screen is an information publishing medium that can be automatically and continuously operated in the public. It is a wonderful embellishment that can set off the atmosphere and decorate the environment. This is more realistic. The way of expression will provide the audience with a more interactive, more interesting and engaging way to meet the audience's subjective needs.

Compared with the traditional movie playback system, the traditional cinema uses a projection system, and there will be a certain degree of defocusing problem. Usually, even if the adjustment is very good, the defocus amount of 1-2 pixels is very common. This is because, fundamentally, the distance projected by the projector to the center of the screen and projected to the four corners is not the same. The principle of projection also determines that there are three primary colors in the projection tube. Their arrangement differs in position. For example, when horizontally arranged, the natural geometry projected onto a flat screen is corrected even with various techniques. The result is that the amount of residual distortion of 2-3 pixels is very common, and the effect of this misconvergence is directly on the color chrome. When projecting a movie, the refresh rate of the projector is generally 48 Hz, and a slight flickering may occur. At the same time, the screen is reflected light, so the white background must be used, so that the contrast is small and the contrast is low.

The LED large-screen movie playback is digital to digital, all of which are electronic processes. The color of the LED light is unchanged for a long time. In addition, the LED screen is self-illuminating, there is no screen, no lens, no reflection, no glare, and It is a black background, so the contrast is much larger and the contrast of the image is much larger. The measured results show that even if the LED display is indoor, its contrast will reach several times that of the screen, so the contrast of the image will be much better. This also determines that the use of LED screens to play movies will no longer appear in the traditional movie playback on the low frequency of refresh, misconvergence, defocus and other common problems.

In terms of the viewing habits and physiological habits of the audience, the cinema projectors project on the screen at the actual brightness level, often have to close the doors and windows, can only be used in dark environments. Since the projection beam deteriorates the viewing condition when the brightness is insufficient, which mainly affects the viewer who is closer to the projector at the rear of the theater, these viewers will feel a beam of light on the head and feel uncomfortable, without a projection system. There is no such thing as "mans." Anyone who has had a cinema experience knows that watching movies in a movie theater requires the human eye to experience the "dark adaptation" when entering the cinema and the "light adaptation" process when leaving the theater. In both cases, there are human pyramid cells. A large number of alternating cells with the column, physiological studies believe that "dark adaptation" is not obvious to the human eye, but the time is long; "light adaptation" although the time is short, but the discomfort to the human eye is very strong, and if the person Eyes often in a large number of alternating states of pyramidal cells and column cells can cause significant eye fatigue and even cause other lesions. There are no two situations in the LED screen movie broadcast.

Moreover, the current indoor small-pitch LED screen generally solves the problem of multi-signal cut-in and processing used indoors, and the switching is very easy at any time, and the layout does not have any formatting problems. Moreover, in the service life and projection facilities, the longest life source of the traditional projection system is only 20,000 hours, and each auditorium must have a separate screening room, occupying a large independent space. Compared with LED displays, which have a typical life of up to 100,000 hours and no need for a dedicated auditorium, there is a problem of excessive long-term input costs.

LED screen technology breakthrough LED screen into the theater is expected to achieve

The LED display is a flat panel display consisting of a small LED module panel. Although the price of a single LED bead does not attract attention, when the combination of hundreds of thousands of LED lights, the cost is difficult to ignore. Take the P2.5 specification small-pitch LED display as an example. There are 160,000 lamp beads per square meter. If the distance is further up to 1 mm, there are 1 million lamp beads per square meter. The LED large screen of the room is calculated according to 100 inches, and the original of the lamp bead will affect the cost of the entire LED screen. Therefore, the primary reason for influencing the LED screen to enter the theater is that the previous investment is too large, and the low-light, high-gray, heat-dissipating and patchwork problems are also the key.

From the development of the LED screen industry in recent years, it can be seen that the competition of conventional LED displays is particularly fierce, and the price war has almost invaded the basic profits of enterprises. As a result, markets in various emerging sectors have developed rapidly. The outdoor media, advertising industry, outdoor surface mounts, and special-shaped screens have shown great performance. Among them, high-density and small-pitch LED displays have become hot products in the industry. In the past few years, most of the LED displays used indoors can only be viewed from a distance, because the spacing has not yet reached the technology of close-range viewing. The spacing of the LED display determines the distance and pixels of the viewing, as long as the spacing is small enough to complete close-up viewing. With the continuous advancement and renewal of LED technology, the LED display civilian market has gradually been valued by many LED companies.

In 2014, on August 11, Liard, the pioneer and industry leader of small-pitch LEDs, revealed that the company currently offers more than 100-inch LED small-pitch TVs, which are much lower than the price of LCD TVs of the same size. At the same time, the company expects to push LED small-pitch TV to the high-end civilian market in the fourth quarter of 2014.

While Chau Ming is working on the LED small-pitch civilian market, it also breaks through the problem of high precision on the process. The accuracy of the patch is accurate to 0.01 mm, which almost reaches the limit of the patch process. At the same time, according to Zhou Ming According to the scientific research and development personnel, the Zhouming UTV0.8 small-pitch display not only has the high gray level, high refresh rate, high life, high consistency, high response speed, high efficiency and low noise of the small-pitch display. The "low-bright high-gray" feature that satisfies the demand for indoor ultra-high-definition display, that is, without losing the gray level under the premise of maintaining low brightness, so as not to damage the user's eyes, but also better restore the image quality without affecting the viewing effect. The contrast ratio is up to 4000:1, the refresh rate is 1980Hz, the gray level is 16bit, the brightness is adjustable from 50-800nits, and the display picture is extremely delicate and real. In the problem of heat dissipation and seaming, the whole die-cast aluminum box is used, and the pre-magnetic maintenance design is adopted, which is light and easy to maintain, and has no fan for natural heat dissipation, achieving zero noise operation; high-precision box body, unique to Zhouming The patchwork fine-tuning structure ensures the display effect of the zero seam.

Although the information revealed by all kinds of data points to the LED display screen or will replace the traditional movie playback screen as a new round of theater, but the Chinese electronic video industry association large screen projection display equipment branch secretary Zhao Handing raised several questions: 1 At present, the 3D laser projectors commonly used in theaters are screened. The films watched by the audience are softly reflected light. The softer light is less harmful to the human eye and can satisfy the audience's long-term demand for watching movies. However, the LED display screen emits self-illumination, the light has not been effectively alleviated, and there is not enough data or experiment to prove whether it can allow people to watch for a long time. 2. Although with the continuous advancement of LED technology, the industry has generally considered that the cost of LED display screens to replace the traditional screen has been expected to be solved, but in the future, whether it is comparable to the widely recognized 3D laser playback system in terms of cost performance. Possession of absolute advantage remains to be seen. 3. As with the emergence of many new things, it is still a problem to be verified as an emerging LED display screen that can be recognized by practitioners in the film industry. 4, LED display screen power consumption problems need to be technically resolved.

Of course, when talking about the LED display screen entering the flexible space of the cinema system, Zhao Handing also said that the LED display screen is very recognized for its advantages in simplifying the projection room and adjusting the brightness. Zhao Handing believes: "The idea that LED display screens replace traditional screen playback is very innovative, but more experiments are needed to demonstrate it."

Indeed, when the LED display screen entered the LED screen civilian market, the breakthrough in technology and cost brought hope to the LED screen market with a size of 68.7 billion yuan. It should not be overlooked that at this stage, the LED screen has to enter the film industry, and the current breakthrough in cost and technology is still insufficient. However, borrowing the fashionable words of the moment: the dream still has to be, if it is realized?