On January 6, 2015, the "2014 China Film Market Impact Research Report" showed that Chinese films have been increasing their contribution to the national economy and have become the main engine of global box office growth. In 2014, the overall scale of the industry driven by movies exceeded 68.7 billion yuan, indirectly providing no less than 500,000 jobs. With the rapid development of the movie market today, large LED screens are rarely seen in theaters of various lines that are popular with urbanites. In the face of the relative blankness of the movie market, can the LED display, which integrates many broadcasting advantages, get a share of the huge movie market?
As vantagens das telas de LED nos cinemas são óbvias
In the face of the relative blankness of the movie market, does the large LED screen have enough advantages to compete with traditional theater playback equipment and enter the movie playback market?
Como uma nova tela de matriz de pontos gráfica dinâmica eletrônica, a tela grande LED é um tipo de mídia de liberação de informações que pode funcionar automática e continuamente nas massas. É um enfeite maravilhoso que pode realçar a atmosfera e decorar o ambiente. Isso é mais realista A forma de expressão proporcionará ao público uma forma de participação mais interativa, mais viva e interessante, e atenderá às necessidades subjetivas do público.
Em comparação com os sistemas tradicionais de reprodução de filmes, os cinemas tradicionais usam sistemas de projeção, portanto, haverá um certo grau de problemas de desfocagem. Normalmente, mesmo que esteja bem ajustado, a quantidade de desfocagem de 1-2 pixels é muito comum. Isso porque fundamentalmente falando, a distância projetada do projetor ao centro da tela é diferente da distância projetada aos quatro cantos. O princípio da projeção também determina que existam três cores primárias no tubo de projeção, e seu arranjo seja diferente na posição. Por exemplo, quando dispostos horizontalmente, a forma geométrica natural projetada em uma tela plana, mesmo que várias técnicas sejam usadas para corrigir e corrigir É muito comum o resultado ter 2-3 pixels de distorção residual. O efeito direto dessa divergência é o flangeamento de cores. Ao projetar filmes, a frequência de atualização do projetor geralmente é de 48 Hz, o que também pode produzir um pouco de cintilação. Ao mesmo tempo, a tela é refletida pela luz, portanto, um fundo branco deve ser usado, o que resulta em baixo contraste e baixo contraste.
E a reprodução do filme na tela LED grande é digital para digital, tudo é um processo eletrônico, a cor da luz LED é constante por um longo tempo, além da tela LED ser auto{0}} luminosa, não há tela , sem lente, sem reflexo, sem brilho, e é um fundo preto, então o contraste é muito maior e o contraste da imagem também é muito maior. De acordo com os resultados reais da medição, o contraste da tela LED será várias vezes superior ao da tela, mesmo que seja do tipo interno, portanto, o contraste da imagem será muito melhor. Isso também determina que o uso de telas de LED para reproduzir filmes não terá mais os problemas comuns de baixa taxa de atualização, convergência incorreta e desfocagem na reprodução tradicional de filmes.
From the perspective of the audience's viewing habits and physiological habits, the actual brightness of the cinema projectors projected on the screen is quite low, and it is often necessary to close all doors and windows and can only be used in a dark environment. Since the projection beam is inherently insufficient in brightness, the viewing conditions are degraded, which mainly affects audiences who are closer to the projector at the back of the movie theater. These audiences will feel a beam of light on their heads and cause discomfort. Without a projection system, There is no so-called "mans". Anyone who has experienced theater knows that when watching a movie in a movie theater, the human eye has to go through the process of "dark adaptation" when entering the theater and the process of "bright adaptation" when leaving the theater. In both cases, there are human eye cone cells. Physiological studies believe that "dark adaptation" is not obvious to the human eye, but it takes a long time; although the time is short, the "bright adaptation" has a strong sense of discomfort to the human eye. The eye is often in a state of alternating between pyramidal cells and cylindrical cells, which can cause obvious fatigue of the eye and even cause other diseases. These two situations do not exist for LED screen movie broadcasting.
Moreover, the current indoor small-pitch LED screen generally solves the problem of multi-signal cut-in and processing in indoor use. It is easy to switch at any time, and there will be no format problems in the projection. Furthermore, in terms of service life and supporting facilities for projection, the longest light source of the traditional projection system is only 20,000 hours. Each projection hall must have an independent projection room, which must occupy a large independent space. Compared with the general life of LED display screens up to 100,000 hours and the need for special projection halls, there is a problem of excessive long-term investment costs.
Avanço na tecnologia de telas de LED Espera-se que as telas de LED entrem nos cinemas
As a flat panel display, LED display is composed of small LED module panels. Although the price of a single LED lamp bead cannot be taken seriously, when hundreds of thousands of LED lamps are combined together, the cost required is difficult to ignore. Take the small-pitch LED display of P2.5 specification as an example. It has a total of 160,000 lamp beads per square meter; if the spacing is further to the level of 1 mm, there will be 1 million lamp beads per square meter. The large LED screen in the room is calculated as 100 inches, and the cost of the lamp beads will affect the cost of the entire LED screen. Therefore, the primary reason that affects the entry of LED screens into theaters is the excessive investment in the early stage. Secondly, the problems of low brightness and high gray, heat dissipation and seam are also the key factors.
From the development of the LED screen industry in recent years, it can be seen that the competition of conventional LED screens is particularly fierce, and the price war has almost invaded the company's basic profits. Following this, various emerging markets have developed rapidly. Outdoor media, advertising, outdoor surface mounts, special-shaped screens and other markets have performed well. Among them, high-density, small-pitch LED displays have become the hottest products in the industry. In the past few years, most of the indoor LED display screens could only be viewed from a distance, because the distance has not yet reached the technology of close viewing. The spacing of the LED display screen determines the viewing distance and pixels, as long as the dot spacing is small enough, close viewing can be completed. With the continuous progress and renewal of LED technology, the civilian market of LED displays is gradually being valued by many LED companies.
Although the information revealed by various data points to the LED display screen or will replace the traditional movie screen to become a new round of dominance in theaters, Zhao Handing, secretary general of the large-screen projection display equipment branch of the China Electronic Video Industry Association, raised several questions:
1. At present, 3D laser projectors are commonly used in theaters. The movies watched by the audience are softly reflected light. This kind of light is softer and less harmful to the eyes, which can meet the requirements of the audience for watching movies for a long time. However, what the LED display screen emits is self-luminous, and the light has not been effectively moderated, and there are not enough data or experiments to prove whether it can allow people to watch for a long time.
2. Embora com o avanço contínuo da tecnologia LED, a indústria geralmente acreditava que o problema de custo que era o maior obstáculo para a substituição de telas tradicionais por telas de LED deveria ser resolvido, mas no futuro, o desempenho de custo comparar com o sistema de reprodução a laser 3D geralmente reconhecido? A vantagem absoluta precisa ser estudada.
3. Like many new things, whether the emerging LED display screen can be recognized by practitioners in the film industry is also a question to be verified.
4. The problem of large power consumption of LED display screens needs to be solved technically.
Of course, when talking about the entry of LED displays into the malleable space of cinema systems, Zhao Handing also expressed his appreciation for the advantages of LED display screens in simplifying the projection room and adjusting the brightness. Zhao Handing believes: "The idea of replacing traditional screens with LED display screens is very innovative, but more experiments are needed to demonstrate."
Indeed, when LED displays are hesitant to enter the LED screen civilian market, breakthroughs in technology and cost have brought hope for LED screens to enter the market of 68.7 billion yuan in the film industry. It cannot be ignored that the current cost and technological breakthroughs are still insufficient for LED screens to enter the film industry at this stage. However, to borrow a fashionable phrase: dreams are still necessary, what if they are realized?
