With the continuous innovation and development of LED technology, in recent years, the application of LED has begun to march into all walks of life. It is unexpected that LED has also begun to appear in cinemas.
For a long time, because LED display screen is self luminous, different from the projection technology of traditional cinemas, it is often questioned by veteran filmmakers as a “large TV screen”. However, since Samsung launched the world’s first 34 foot LED display screen “Cinema Screen” in the cinema of Lotte World Tower last year, its advantages of a wider perspective, higher contrast, and better picture quality have attracted people’s great surprise and praise, and LED has successfully opened the film market.
According to the situation of cinemas, LED displays with 1.5mm pixel spacing have fully met the demand for viewing. At the same time, it has the characteristics of high refresh, high gray scale, high brightness utilization, no residue, low power consumption, and low EMI. The indoor application is non reflective, lightweight, ultra-thin, high precision, small transportation and use space, quiet, and efficient heat dissipation. At the same time, the picture quality is quite realistic, which can also meet the current viewing experience, and even more realistic than the projector to a certain extent.
Have you ever wondered why the LED LCD technology is so advanced now, and Samsung has launched the world’s first Cinema Screen, why most cinemas still use projectors, which seems to be an ancient method?
1. Cost issues
Yes, if you want to make a display screen with the same size as the projection area according to the standards of cinemas, it is hard to imagine how to do it in terms of technical difficulty.
For now. The price of the 100 inch Sony TV Z9D is nearly 500000 yuan, while the highest price of the 100 inch projector is 25999 yuan. From this, we can see that under the same display area, the price of the display screen is nearly 19 times that of the projector.
If the IMAX theater is more advanced, the screen is generally 300 to 600 square meters. If we calculate according to a standard IMAX screen size of 22 * 16 meters, the cost of this screen is about 8.8 million yuan! This is undoubtedly unrealistic for a cinema.
It is precisely because of the characteristics of large size and small pixel screens, one of which is also made up of tens of millions of small pixels, which also increases the cost of later maintenance invisibly. It can be imagined that when the image quality is still very high and the pixel density is very high, although the life of the LED lamp bead can reach more than 100000 hours, due to its high density, it is difficult to dissipate heat in a limited space, and it is easy to have local failures. It is not a simple thing to maintain and overhaul such a giant, which may require a lot of manpower and material resources.
At the same time, in addition to poor heat dissipation, LED displays also have some problems, such as “bad points”. At present, most of the LED screens seen have more or less bad points. If they are not repaired in time, they will form a diffusion, which will affect other normal highlights, and eventually lead to abnormal display of part or the whole of the display. Compared with the screen that is easy to take care of, the maintenance cost brought by the LED screen cannot be ignored.
3. Eye comfort
The cinema is dark, and the naked eye needs uniform diffuse light when watching, so that not only every corner can be seen clearly, but also the reflective image is more comfortable for the naked eye. The direct image easily exceeds the threshold of the naked eye, making people feel dazzling. This is why watching TV in the dark is dazzling, because it is a self luminous device.
When we look at natural objects, they do not give off light. They can only be seen when natural light is reflected on them. If everything is dark, and the projection is to hit the light on the screen cloth, we see that the projection cloth itself does not give off light. Why is the Kindle not tired of reading? Because the ink screen is not self luminous, it is also a reflective screen.
Therefore, although the projector looks less advanced, it is mainly considered in combination with cost, post maintenance and other aspects, so it is not difficult to know why the movie theaters does not use LED display.