No need for any special eyewear to enjoy 3D videos on smartphones. Recent developments have made it possible to prepare smartphone displays that offer both 2D and 3D imaging facility. It means you could watch 3D videos on your smartphone itself, without any special eyewear.
To convert the normal display into the one that doesn’t need eyewear, the picture’s pixel and optics are grouped together behind the display. It thus generates the stereoscopic effect, which makes it possible to watch 3D videos on smartphones, without any need of special optical wearable.
There are two ways available to make the above strategy happen. It can be either generated through a group of micro-lenses (also known as a lenticular lens). Otherwise, it is also possible to create the same effect through micro filters, also known as parallax barriers. The micro-lenses or the micro-filters are used in front of the image. Thus, the image can appear perfectly irrespective of the angle it is being viewed. You may take the movie posters into account, the objects of which change as you change your position.
In this case, multiple images are layered and printed behind a plastic layer having grooves corresponding to the patterns at which it is interlaced. These grooves act as separately layered micro lenses or filters, which showcases one image as you move towards the poster. It shows the other as you go away. When it comes to the 2D to 3D Convertible displays, the above layers can be made active or inactive, according to the requirements.
The perfection of the idea depends on the distance between the image layer and the plastic layer. This determines near view or distance view. Well, a polarizing layer can also be used with images. An effective structure that groups the barriers, image layers and a polarizing sheet with perfection has been developed by Sin-Doo Lee (professor at Seoul National University, South Korea), and his colleagues.
As mentioned above, they used the polarizing layer directly with the images at one side of interlayer. The other end of which had the active parallax barrier of liquid crystal, as an array of periodically patterned indium-tin-oxide (ITO) electrodes. The purpose of such interlayer is basically to reduce the distance between the images and barrier layers. Hence, it becomes possible to have the closer 3D views through the compact smartphone displays. This interlayer strategy effectively combines the high resolution along with the flexible designs of the smartphone displays. It can also be effective for other display structures, offering greater flexibility in viewing angle.
The concept is certainly expected to revolutionize the manufacturers of budget 2D/3D convertible smartphone displays. Especially, the light weight devices can find the technology most effective for their application. Not just the LC 2D/3D displays, though, the technology can be equally significant for OLED 2D/3D displays as well, encouraging the development of more flexible designs.