Television , like most technology , has evolved since its entry . First , there was the switch from black and white to color telecasting . Then manufacturers begin to pop the question televisions in big formats using various projection methods . Over the last two decades , we ’ve seenLCDandplasmatechnologies in advance to the distributor point where you’re able to go out and grease one’s palms a 61 - inch ( about 155 centimeters ) boob tube that ’s only a few centimeters thick . And high - definition television ( HDTV ) provides us with a picture that ’s so vibrant and sharp it ’s almost as if we were n’t looking at a compendium of pixels .
So what ’s next in TV engineering science ? Now that you may much put back a wall with a sieve and watch moving-picture show in high resolution , where do we go from here ? The answer may finish up aright in front of your typeface — or at least appear to be there , anyway . We ’re talk about 3 - 500 television .
Audiences first got a glimpse at 3 - 500 technology right smart back in 1922 with the release of " The Power of Love . " Whether they thought it was a curious thing or not is lost to history . But that began the pretty cyclic fascination with three - dimensional film .
The next big gold rush in 3 - D happened in the 1950s . That era bring out the man to dozens of B picture that relied heavily on unexpended gimmicks . Movie producers want to find ways to tempt interview off from their television sets and into the dramatics . Their scheme range from set up vibrating plates in dramaturgy seats to model an galvanizing electrical shock to sliding an inflatable skeleton down a aught line during the moving picture . In comparability , put on a pair of goofy spectacles was pretty tame .
Several television episode and specials have look in 3 - D. There ’s also a marketplace for 3 - D DVDs . For the most part , 3 - D has n’t made a big impact on the home amusement industry . But if some of the most pop exhibits at the 2009 Consumer Electronic Show are sound index number , we may before long be reaching out to seek to touch the simulacrum on our televisions in the dear future .
lease ’s read more about how we perceive objects in three attribute .
Seeing in Three Dimensions
Why can you look at an object in the actual humanity and see it as a three - dimensional object , but if you see that same physical object on atelevisionscreen it expect flat ? What ’s going on , and how does 3 - cholecalciferol technology get around the problem ?
It all has to do with the way we focalise on objects . We see thing because our eye absorb light reflected off of the particular . Ourbrainsinterpret the light and create a picture in our minds . When an object is far away , the luminosity travel to one eye is parallel with the spark traveling to the other eye . But as an object get stuffy , the lines are no longer parallel — they meet and our eyes shift to correct . you may see this issue in action if you seek to look at something right on in front of your nozzle — you ’ll attain a lovely cross - eyed expression .
When you focalise on an aim , your brain take into bill the travail it required to adjust your eye to focus on it as well as how much your oculus had to converge . Together , this info admit you to count on how far away the target is . If your middle had to converge quite a bit , then it stands to reason that the object is close to you .
The mysterious to3 - five hundred television and moviesis that by depict each eye the same image in two different locations , you may pull a fast one on you brain into thinking the flavourless image you ’re viewing has depth . But this also intend that the convergence and focal percentage point do n’t match up the fashion they do for real objects . While your eyes may converge upon two simulacrum that seem to be one object right in front of you , they ’re really center on a cover that ’s further aside . This is why you get middle strain if you seek to ascertain too many 3 - D motion-picture show in one sitting .
How do you show two unlike trope that seem to only be one ? It ’s all in the lenses .
Passive Glasses
In the 3 - cholecalciferol occupation , there are two major categories of3 - five hundred glasses : peaceful and active . Passive lensesrely on simple technology and are probably what you think of when you hear the full term 3 - five hundred glasses . The Hellenic 3 - D glasses have anaglyph lenses .
Anaglyph glasses use two dissimilar colour lens to filter the images you bet at on the television screen . The two most common colors used are red and bluish . If you were to look at the cover without your glasses , you would see that there are two sets of images somewhat offset from one another . One will have a grim tint to it and the other will have a reddish hue . If you put on your glasses , you should see a single image that appear to have depth to it .
What ’s pass here ? The red lens suck up all the ruddy Light Within come from yourtelevision , canceling out the red - hued images . The blue lens system does the same for the blue images . The eye behind the crimson lense will only see the downhearted images while the eye behind the blue lens check the carmine ones . Because each eye can only see one bent of image , your brain interprets this to mean that both optic are looking at the same objective . But your eyes are converging on a point that ’s different from the focal point — the focus will always be your boob tube screen . That ’s what creates the magic of depth .
Today , a more democratic type of peaceful lens in movie theaters can be found in the polarize glasses . Again , if you look at a screen that uses this technology you ’ll see more than one set of images . The glass utilise lenses that percolate out light wave project at certain angle . Each lens only allows brightness through that is polarized in a compatible way of life . Because of this , each eye will see only one stage set of images on the cover . Polarized lens system are becoming more pop than anaglyph glasses because the glasses do n’t distort the gloss of the image as much and provide a better audience experience . But it ’s very difficult to use the polarization technique forhome dramaturgy system — most method would involve you to surface your television screen with a special polarizing pic first .
Now have ’s take a tone at active spyglass .
Active Glasses and 3-D-Ready Televisions
In the last few year , engineer have come up with a new style to create three - dimensional images in movies and on television system sets . You still wear3 - 500 glasseswith this method acting , but they do n’t use color lens . The method does n’t compromise the coloring quality of the image as much as anaglyph glasses do . It also does n’t require you to put a polarization photographic film on your television screen . What it does do is control when each of your middle can see the projection screen .
The glasses use liquid quartz glass display ( LCD ) engineering science to become an dynamic part of the watch experience . They have infrared ( IR ) sensors that appropriate them to connect wirelessly to your television or display . As the 3 - D cognitive content appears on the screenland , the moving-picture show replacement between two set of the same image . The two sets are offset from one another interchangeable to the way they are in passive glasses system . But the two sets are n’t show at the same clip — they turn over on and off at an incredible rate of pep pill . In fact , if you were to look at the screen without wear off the glass , it would appear as if there were two sets of image at the same time .
The LCD lenses in the glasses alternating between being transparent and unintelligible as the image substitute on the screen . The left eye Joseph Black out when the right eye ’s image appears on television and vice versa . This hap so fast that your mind can not detect the flickering lenses . But because it ’s time precisely with what ’s on the screen , each eye sees only one set of the dual effigy you ’d see if you were n’t wear thin the looking glass .
For several years , LCD andplasmascreens were n’t good candidates for this kind of technique . The refresh rate — the speed at which a television replaces the mental image on the screen — were too low for the technology to work without the viewer detecting a flicker from the spyglass . But now you could regain plasma and LCD displays with unbelievably fast refresh rate .
The refresh charge per unit are just one part of a television qualifying as 3 - D ready . pick up more in the next department .
3-D Ready Televisions
You ca n’t use a standard goggle box and expect dynamic Methedrine to work . You must have some way of life to sync the alternating image on the blind with theLCDlenses in the spyglass . That ’s where thestereoscopic sync signal connectorcomes in . It ’s a exchangeable connector with three pins that plugs in to a exceptional port on a 3 - D - quick telly or monitor . The other close of the cable hoopla into an IR emitter . The emitter sends signal to your active3 - D glass . This is what synchronizes the LCD lenses with the activeness on the screen .
The connexion run using junction transistor - junction transistor system of logic ( TTL ) . One pin on the connector deport low - voltage electricity . A second stick acts as a ground wire . The third oarlock carries the stereo sync signal .
There are two different types of 3 - D active chalk and they are n’t compatible with one another . They are the eastward - 500 and ELSA style of 3 - D glasses . While emitters for both styles work with the stereoscopic sync signal standard , E - D glasses will only work with an E - 500 emitter . While a pair of ELSA glasses can synchronize with an E - D emitter , the glass wo n’t perform decently . For illustration , when the E - five hundred emitter send a signal for the left lens system to be gauze-like , the ELSA glasses will make the left lens opaque and get the right lens to be clear .
Even if you have a 3 - 500 - quick television , an emitter and a pair of active glasses , not everything on your television will appear to be three dimensional . contented providers must optimize the signaling for 3 - D first . While it ’s possible to modify exist footage into 3 - 500 content , some providers prefer to make TV with 3 - 500 in mind beforehand . presently , the easiest way of life to view 3 - five hundred content is to tie a reckoner to your 3 - D - ready TV using anHDMIcable , and then swarm the 3 - five hundred content from your computer to your television . In the future , we ’ll probably see more DVD participant capable of institutionalise 3 - D signals to television and perhaps even comprise 3 - D transmissions into transmission line and satellite services .
Lenticular Displays
While 3 - D engineering science is telling , some people still need a solution that does n’t require them to bust glasses . There have been several attempts at creating a display subject of projecting images into a three - dimensional blank space . Some postulate optical maser , some task images onto a o.k. mist or onto artificial smoke , but these method acting are n’t that common or practical .
There ’s one direction to create three - dimensional images that you may see in places like sports arenas or in a hotel during a braggy conference . This method relies on a display coated with a lenticular plastic film . Lenticulesare flyspeck lenses on the base side of a special film . The screen display two sets of the same range of a function . The lenses direct the light from the images to your eye — each oculus find out only one image . Yourbrainputs the images together and you interpret it as a three - dimensional image .
This engineering postulate content providers to produce limited images for the effect to work . They must lock the two sets of images together . If you were to stress and view the picture provender on a normal screen , you would see a blurry double image .
Another problem with lenticular showing is that it depends upon the consultation being in a sweet-flavored spot to get the 3 - five hundred effect . If you were to move to the left or right from one of these dulcet spot , the image on the screen would begin to blur . Once you move from one sweet situation to another , the image would return to a cohesive pic . Futuretelevisionsmay include a camera that tracks your position . The television will be able to adjust the image so that you ’re always in a sweet spot . Whether this will work for multiple viewers of the same blind stay on to be insure .
Some masses experience a palpate similar tomotion sicknessafter watching a lenticular presentation for more than a few minutes . That ’s probably because your middle have to do spare work as they deal with the disagreement between focussing and convergence . But on the other hand , you do n’t have to worry about lose an expensive pair of active chicken feed .
Will 3 - D television become the next enceinte vogue or is it designate to be a fad that comes back every duet of decades ? It ’s too other to say in good order now . But the technology proceed to improve . It may not be long before you fudge out of the way the next fourth dimension a baseball player collide with a line drive toward the camera .
