Red, green, or blue edges on moving subject matter caused by the sequential projection of red, green, and blue picture content from a video projector with a single image generating element and a color wheel, which projectors include all modestly priced DLP projectors. Although the better color wheel projectors produce sets of red, green, and blue sub-images that match in content and also more flashes per second, the viewer's eye movements may still result in the viewer's seeing the colored edges.

Answered by Shobhit , an ibibo Master, at 6:01 PM on May 09, 2008

An optical effect of the sky formed by sunlight falling on the spherical droplets of water associated with a rain shower. The circular arc of colors in the rainbow is seen on the side of the sky away from the Sun.

Red, green, or blue edges on moving subject matter caused by the sequential projection of red, green, and blue picture content from a video projector with a single image generating element and a color wheel, which projectors include all modestly priced DLP projectors. Although the better color wheel projectors produce sets of red, green, and blue sub-images that match in content and also more flashes per second, the viewer's eye movements may still result in the viewer's seeing the colored edges.

Answered by Ashish Yadav , an ibibo Wizard, at 7:08 PM on May 08, 2008

one of the leading artifacts of DLP technology is color breakup and is also known as rainbow effect.the rainbow effect appears as a momentary falsh of rainbow-like striping typically trailing the bright objects wen looking frm one side of the screen to otherside quickly,or wen quickly looking wawy frm tv to an off screen object.

Answered by aliasgar , an ibibo Master, at 7:10 AM on May 05, 2008

well kajol
Rainbows are optical and meteorological phenomena that cause a spectrum of light to appear in the sky when the Sun shines onto droplets of moisture in the Earth's atmosphere. They take the form of a multicoloured arc, with red on the outer part of the arch and violet on the inner section of the arch. More rarely, a secondary rainbow is seen, which is a second, fainter arc, outside the primary arc, with colours in the opposite order, that is, with violet on the outside and red on the inside.
A rainbow spans a continuous spectrum of colours. Traditionally, however, the sequence is quantised

Answered by jaivir , an ibibo Master, at 6:32 PM on May 01, 2008

well kajol, In laymans terms. A normal tv picture is made up of red, green and blue (RGB). The pictures made up by these three signals are presented to your eyes, on a crt, at the same time. With DLP technology (in broad terms) the RGB pictures are presented to your eyes one after the other, ie NOT at the same time. However, to fool your eyes into thinking its seeing the RGB pictures all at the same time the individual R,G,B pictures are shown very very quickly in succession one after the other. This can lead to a strange effect called ' the rainbow effect' if an object moves very quickly across the screen - the problem is most prevalent when the object moves so fast that as the individual R,G,B pictures are presented to your eye the object appears in a different position on what would otherwise be identical R,G,B pictures. A practical example - visualise a man facing you standing in the centre of the picture. He is waving his hand (as though he was waving goodbye to you !) very quickly. Look at his hand - you MAY see a rainbow effect around his hand - this is because his hand is moving very quickly in relation to the R,G,B pictures being presented to your eye. NOT everyone will see this effect, some MAY see the effect - there is no consensus and it is entirely subjective. So, if you see a tv or PJ using DLP technology its absolutlely essential that you get all the members of the viewing family to see it first before making a firm decision - and, please don't castigate anyone who says they can see it if you insist you can't - it's subjective.

Answered by satyaiitk , an ibibo Master, at 4:11 PM on May 01, 2008

Red, green, or blue edges on moving subject matter caused by the sequential projection of red, green, and blue picture content from a video projector with a single image generating element and a color wheel, which projectors include all modestly priced DLP projectors. Although the better color wheel projectors produce sets of red, green, and blue sub-images that match in content and also more flashes per second, the viewer's eye movements may still result in the viewer's seeing the colored edges.

Answered by ajay bhutani , an ibibo Citizen, at 3:06 PM on May 01, 2008

The "rainbow effect" is unique to single-chip DLP projectors. As described above, only one color is actually displayed at any given moment. As the eye moves across the projected image, these separate colors become visible, resulting in a perceived "rainbow".The structures in the spectra can be well explained by rainbow effects arising from rotational and vibrational excitation.

Answered by Kajal Sharma , an ibibo Master, at 8:04 PM on April 30, 2008

hi kajol:-
Rainbows are optical and meteorological phenomena that cause a spectrum of light to appear in the sky when the Sun shines onto droplets of moisture in the Earth's atmosphere. They take the form of a multicoloured arc, with red on the outer part of the arch and violet on the inner section of the arch. More rarely, a secondary rainbow is seen, which is a second, fainter arc, outside the primary arc, with colours in the opposite order, that is, with violet on the outside and red on the inside.
A rainbow spans a continuous spectrum of colours. Traditionally, however, the sequence is quantised. The most commonly cited and remembered sequence, in English, is Newton's sevenfold red, orange, yellow, green, blue, indigo and violet. "Roy G. Biv" and "Richard Of York Gave Battle In Vain" are popular mnemonics.

Rainbows can be caused by other forms of water than rain, including mist, spray, dew, fog, and ice. Moreover, rainbows can have shapes other than a bow (arc), including stripes, circles, or even flames.

Answered by shepherd , an ibibo Master, at 5:04 PM on April 30, 2008