HP 3D glasses free for smartphones

Hewlett-Packard have developed this 3D glasses for videos in mobile phones. By just tilting the screen we can view the object widely. Its small and multi-angled. This multiangled helps to project the 3D image in  correct perspective in several spatial directions. To track the eye movements no special cameras are used. They have found a way to make images viewable in 3-D from angles up to 45 degrees from center in any direction -up, down, side-to-side or diagonally. That means viewers can see a person’s face with one ear blocked from view, but reveal the ear by swiveling the screen.

The scientists used nanotechnology to etch multiple circles with tiny grooves into a glass layer of the display. A special backlight technology is used in this 3D. A modern LCD monitor usually has a backlight that consists of LED strips along the bezel. A strip of LEDs along the edge doesn’t provide very even illumination, and so a diffuser must be used. A diffuser is basically a thin piece of plastic that takes the light source and spreads it evenly across the full width of the display.

The grooves bend light in a way that allows for 64 different points of view. By moving the screen, people will perceive two of those points of view at any one time, one with their left eye and one with their right. As a result, the image will appear in 3-D.