The optimum TV screen size is directly distance around the viewing area available - but there are other factors, the test must be taken into account.
Viewing distance: it is only a matter of personal taste?
Sit next to the big screen TV and you can see the structure of image structure - scanning lines or pixels forming the image - so annoying your attention and care for your home theater experience. Yet, sittingaway, and the effects are lost.
There are different opinions about the best way to determine the optimal size for TV viewing a particular screen. Only Theatre go to the movies and soon realize that it is preferable to all a matter of personnel - someone could sit down and I'm a. would direct the first of the series, as a bigger picture and wider viewing angle you prefer, while some would just choose random place somewhere between thesetwo extremes.
The truth is that there is no scientific rules her. This does not mean that there are no guidelines to follow when planning a purchase should be an aspiring big screen or home theater room.
SMPTE Recommendations and the THX certification standards:
The Society of Motion Pictures and Television Engineers (SMPTE) recommends that the screen size for home theater use should look to take a range of 30 degrees - in the horizontal plane - theAudience. Alternatively, the ideal TV viewing distance should be such that the screen width occupies an angle of 30 degrees from vertical.
The vision of 30-degree angle appears to many as the standard for home theater and the movie have been taken.
SMPTE policy is also in line with the THX certification standards recommended in this, that the back row of seats should have at least a viewing angle of 26 degrees and a recommendation inexcellent viewing angle of 36 degrees.
It is believed that within these limits of view of the audience is even better than the film immersed in the action.
Vision System limitations:
There is also the question of TV viewing distance on visual acuity. This does not correspond to the optimum viewing distance - rather, it refers to the maximum viewing distance to lose some image detail.
Technically, a visual acuityMeasurement of the spatial resolving power of the eye and gives the angle at which the smallest detail that a person can resolve the visual system. A person with 20/20 (or 6 / 6 is expressed in meters) normal vision can resolve a spatial pattern in terms of a degree a minute of arc angle ie 1/60th separately, in the eyes when viewed at 20 meters. In other words, a person with normal 20/20 vision can identify an object with a height of 1.76 mm at 20 meters.
InTerms of television, these distances the point where some of the image is displayed on the display is not dissolved by the vision system.
So how do you translate all this into practice?
A few rules-of-thumb to help put into practice the guidelines above. These rules for viewing distance refer to the width of the screen instead of the screen diagonal and therefore apply shown for both 4:3 and 16:9.
A general rule for TVViewing guidelines based on distance visual acuity and SMPTE, the TV is that the new distance between you and your big screen television should be) able to be limited to about twice the width of the screen (more precisely 1, 87 x screen width for a subtended angle of 30, while the furthest distance being no more than five times the width of the screen.
This rule should give a good approximation of loyalty, for viewing TV remotely. It is notnecessarily the ideal home theater viewing distance, but the limits within which your TV viewing distance should theoretically area out of trouble.
In other words, the approach twice the width of the screen size, and image scanning lines, pixels and other video artifacts will see plenty too intrusive - a distraction that just ruin your movie experience. Width of the screen that leads further away than 5 times ie your visionSystem will no longer be able to resolve all the details.
But ...
It 'also important to realize that these maximum and minimum viewing distances should be in the light of the definition of the video signal can be considered.
A fully resolved high definition TV (1080i, 1920x1080) supports a closer viewing distance for standard analog television. Thus, while twice the width of the screen appears the ideal TV viewing distance for a HDTV, it would be a bit 'closer tofor standard TV, in the latter case, three times the width of the screen would be a better choice.
The five times the screen width than the maximum visibility, while insufficient for a normal analog TV picture is a bit 'out for someone to look far for the image detail of HDTV by the end supported - three to four times the width of the screen is a practical limit to the maximum distance in the case of HDTV viewing.
These rules-of-thumb work bestTV with large screen sizes in the range of 42 "and more.
In the case of TV drama is the use of normal standard definition analog scale at home, up to 36 "/ 40" diagonal, the optimal field of view is between 8 feet and 12 feet. TV smaller than 36 inches aren 't big enough to qualify for home theater use, not the screen size is less than the desired effect on the viewer.
Vertical viewing angle and height of the screen:
Tobest representation should be in the eyes of the beholder level with the center of the screen.
Maximum vertical view angle: the home theater set-up, where it is not possible, the SMPTE guidelines suggest the maximum vertical angle measured on the seat height from the center of the eye sits in the front row at the top of most of the projected images should be not more than 35 degrees.
This is not the best viewing angle, but the limit beyond which the viewer issubject to increased neck.
The maximum vertical angle is always measured in the front row as this represent the extreme viewing angle.
Minimum angle: while it would seem to meet a specific SMPTE or THX guidelines in this, studies have shown that when the screen occupies 15 degrees vertical field of view less of the spectator, as the image appears small.
Practical Considerations:
In a typicaltheater, you need not really worry about neither the maximum vertical viewing angle, even in vertical viewing angle for a minimum effective cinematic experience.
If you notice the width recommended TV viewing distance of twice the screen (as specified above based on a vision of the scope of Directive SMPTE 30 degrees), you would automatically be the vision of compliance with the minimum angle. The reason is that there is afixed ratio between the height and width of the screen to the home theater screen aspect ratio of 16:9 or 4:3.
Further more, in a typical home theater would be very difficult to exceed the maximum vertical viewing angle beyond which there will be subject to increased neck.
Considering that most home theater rooms are approximately 10 feet (3 meters) high, the resulting vertical viewing angle well detailed within the normal maximum of 35 degreesSMPTE guidelines - all you need to do is to remain only within twice the screen width guideline for your viewing distance.
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