3D market nowadays hot, so that more and more studios are closely follow the footsteps row of 3D movies.However, from the projection effect is unsatisfactory.Many audiences reflect, watching movies often encounter 2D movie is very bright, 3D The film can not see the awkward situation of the picture. Why is there such a phenomenon?
The reason is that some cinema parties are vague about the concept of screen projection brightness standard and subjectively adjust the brightness of the screen, resulting in a large screen brightness contrast and poor audience viewing performance. For example, a video City on 21 meters wide screen, showing 3D movies, the screen brightness of 7FL (Vmbr), will be able to give the audience a comfortable viewing experience; and this studio using the same power play 2D movies, the screen brightness value close to 30FL, Seriously beyond the human eye's ability to observe the image, bringing a strong discomfort, affecting the viewing experience.
The study found that the human eye on the best observation of the image brightness of about 14FL, this time on the color recognition, the details of the image of the feeling of comfort and the human eye is the best.Therefore, the United States DCI (Digital Film Initiative) developed Screen projection brightness standards, the proposed 2D screen brightness of 14 ± 3fL, 3D screen brightness of 7 ± 2fL.
Therefore, the small N proposed cinema projection staff, in the projection of 2D / 3D movie, according to the DCI standard reasonable projector power adjustment to ensure the screening screen brightness in line with the human eye on the reasonable observation of the image observation.This will not only give the audience an excellent view Shadow effect, but also effectively extend the life of the projector.
The question arises, why the rational use of the projector power can effectively prolong the life of the projector? (Because the laser projector has become the new choice of many studios, so today we are mainly for laser projectors to discuss.)
Here have to talk about the principle of laser light source: the laser is energized by a semiconductor laser excitation, the laser has thermal characteristics, the normal life of 20,000 hours, and high temperature will affect the stability and life of the laser. When the driving current is increased (that is, the output power is increased), the working temperature of the laser increases accordingly. In the long run, the aging of the laser is accelerated; on the contrary, the output power is reduced, The operating temperature of the laser is reduced and the operating time is prolonged, so that the working temperature is different due to different power, thereby affecting the service life of the laser light source.
Under normal circumstances, when the laser source brightness decay to 50% of the initial value, the projection effect compared to the initial installation greatly reduced.So, at different output power, the laser source brightness decay to 50% and how long it?
When the laser light source temperature is within 25 degrees, if your light source output power of 100%, then your laser projector can use about 20,000 hours; output power to 90%, you can use about 30,000 hours; and the output Power adjustment to 30%, then you will have nearly 80,000 hours of use of time can be seen, the use of power is lower, the longer the life of the laser light source.
So, for the studio operators, how to radically extend the useful life of the projector? NEC recommends that theater operators from the early selection of machinery to the late landing to use two aspects:
1, the pre-projector selection, we must take into account the brightness of the laser light source attenuation, leaving a certain amount of redundancy for the brightness of the projector light source, to avoid late due to laser aging caused by low brightness results in poor projection.
2. For users who have already purchased laser projectors, it is recommended to adjust the use power of 2D / 3D movies according to the standard of DCI projection to avoid the visual display of 2D and 3D videos under the same power, which makes the 3D brightness normal and the 2D brightness too high, causing the audiences visual fatigue.
Reasonable selection and use of the machine is not only an effective way to extend the life of the projector, but also to maximize the profit guarantee Studios.
As a leader in laser projectors, NEC not only excels in technology, but also stands in the user's point of view for the sake of users. From pre-configuration of screening equipment to on-site installation, NEC will give reasonable planning and advice, not only technical expertise but also thoughtful In the actual installation, the deployment of appropriate use of power on site will not only ensure the viewer's perception of comfort of the screening screen, but also give consideration to the long-term service life of the laser light source.
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