25-05-2012, 01:11 PM
3D LED TV
3D LED TV.ppt (Size: 345 KB / Downloads: 30)
introduction
Employ technique of 3D presentation
A special viewing device to project a television program in to a realistic three dimensional field.
Inventor-David Brewster
Improved by Louis jules
What is diff.b/w led & lcd
Lcd t.v. use florescent backlighting which is primarily responsible fpr longer life.
Lcd consume lesser amount of power than regular t.v.
Led t.v’s make use similar tech. as lcd’s with a single diff. there source of backlight illumination is not florescent.
Active 3D glasses
Shutter glasses are most commonly used
In 3D glasses,the lenses are actually small lcd screens.
Each eye sees a slightly diff. angle of the same imagecreating the 3D effect.
Passive 3D glasses
Polarization is another method of displaying 3D content via passive glasses.
It works by using lenses that block certain wave length of visible light.
Linear polarized glasses use vertical polarization on one lens
And horizontal polarization on the other.
Health effects
Some viewers have complained of headaches and visual problems after watching 3D t.v. and flim.
There have been several several warnings ,specially for children.