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Optoelectronics/Displays??

High-res 3D display allows view zone selection

Posted: 13 Aug 2008 ?? ?Print Version ?Bookmark and Share

Keywords:3D? LCD? display? VGA? lens?

Seiko Epson Corp. has created a high-resolution (equivalent to QVGA) autostereoscopic 3D LCD that gives freedom of viewing position compared to common 3D displays, without any special glasses.

The level of excitement is higher for movie and gaming industries that have 3D images compared to those who simply offer 2D images. At the same time, those that have conventional 3D displays have limited viewing zone and low resolution. What Epson brings is a newly developed 3D display that responses to some viewing barriers and now has lenticular lens optimally designed for a view width of 31mm to 32.5mm. This prototype gives sharp, vivid 3D images over a wider viewing zone. Epson has enhanced the perceived image quality through the step 3D pixel array technology.

Epson's innovation
As a means to promote 3D displays and 3D content, Epson has made the optimized 31mm to 32.5mm view width as an industry standard. The company sees 3D displays that provide sharp scenes and vivid color as the next-generation of highly realistic displays and is working on proposals for offering compelling entertainment to customers.

Customizing features
Epson promises to have smooth 3D images. Its display is a multiview system. Multiview systems are recognized to have superior 3D image reproduction because the visible image changes together with the observer's vantage point in relation to the screen. Increasing depth illusion in stereoscopic 3D images, the design engineers can enhance view count so that the image can be seen from various head positions. What becomes a problem are the rising view counts that result in a loss of resolution per view, since many pixels can be placed on a LCD.

Seeking new approach
The common multiview displays use lenticular lenses for a view width of 62mm to 65mm, a distance between the two eyes of an average person. Epson, steering the common industry perception that made the best view width as suited to the distance between the eyes, devised a system according to a view width from 31mm to 32.5mm. Optimizing its own design, with special considerations on the resolution, conventional measurements and 3D specs, Epson has succeeded in making smooth, high-quality 3D images.

Expanding view zone
The images on common 3D displays with a view width from 62mm to 65mm can look incorrectly and may be distracting unless seen head-on from a particular distance, since the eyes can detect a 2D image in portions of the display. The optimized view width on Epson's display reduces the appearance of visible 2D images and enables natural-looking 3D images to be seen from a wider viewing zone.

Resolution loss problem
In cases of resolution loss on multiview displays, Epson employs an image processing technology called step 3D pixel array that considers the human eye's sensitivity to resolution loss in the horizontal direction. Reducing pixel horizontal resolution degradation, the company has enhanced perceived image quality to give viewers with sharper, more vivid 3D images.

Main display specifications:

  • Display method: 32.5 mm view width; 8 views (lenticular lens)

  • Pixels per view (3D pixels): 384 x 256 (equivalent to QVGA)

  • Best viewing distance: 450mm

  • 3D viewing angle: 12.5 (to right and left)

  • Screen size: 2.57-inch (diagonal)

  • Panel pixels: 1024 x 768 (equivalent to XGA)

  • Display type: low-temperature polysilicon TFT LCD





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