News Release: The former Hitachi Displays

April, 12 2010

3D IPS LCD for Mobile Phones
- Reduces the Doubling Effect in 3D Images -

Hitachi Displays, Ltd. (President: Yoshiyuki Imoto, hereafter referred to as Hitachi Displays) has developed a new 3.1-inch 3D LCD for mobile phones that uses a parallax barrier display to reduce the effect that causes a doubling of images due to a change in perspective. This newly developed display uses the IPS LCD for a parallax barrier*, with an innovative electrode structure for powering the LCD. Images that are visible to one eye are seen less brightly by the other eye, reducing the doubling effect in 3D images.

Currently, there is a major trend toward displaying 3D images on LCDs, from large displays such as those used for televisions to small and medium sized displays such as those used for videogame devices and mobile phones, with a need for 3D images that are eye-friendly and cause little visual fatigue. Together with NTT IT Corporation, Hitachi Displays developed in 2005 a display for car navigation systems and amusement devices that uses the brightness ratio between two interspersed LCDs to produce a 3D effect visible to the naked eye. Since that time, Hitachi Displays has continued to focus actively on the development of 3D LCDs.

Recently, parallax barriers have become the main method for displaying 3D images on mobile phones. This method involves placing a panel of vertical slits, the parallax barrier, in front of a image displaying LCD so that each eye sees a different image, thereby creating a sense of depth. Since this method allows a separate image to be viewed by each eye, the stereoscopic effect is enhanced. However, a change in perspective tends to cause a doubling of the image, and concentrated viewing can result in visual fatigue.

Hitachi Displays has added an IPS LCD to this combination of parallax barrier and image displaying LCD, with an innovative electrode structure for powering the LCD. This allows both eyes to view the same image, only one much less brightly than the other. The result is an IPS 3D LCD that reduces the image doubling effect caused by changes in perspective, the source of visual fatigue. In addition, touch panel functionality can also be added to this 3D LCD.

Hitachi Displays will continue to enhance the development and sales of high-value added products such as this newly developed 3D LCD.

* Parallax barrier: Panel that controls the display of images to the left and right eyes to create a stereoscopic effect

Primary specifications of newly developed 3D LCD

Item Specification
LCD size 3.1-inch (8cm diagonal)
Display size 38.16 (horizontal) × 67.893 (vertical) mm
Pixels 480×(RGB)×854 (FWVGA)
Brightness (during 2D display) 400cd/m2
Contrast 1000: 1
Color reproducibility 70% (Compared with NTSC CIE1931)

Comparison of conventional "parallax barrier" 3D LCD and the newly developed 3D LCD