Sharp said that the new 3D display does not have those problems. As for the first problem, it doubled the resolution and the brightness by scaling down the TFT (thin film transistor) of the LCD panel. The new display has a screen size of 3.4 inches and a pixel count of 480 x 854.
The resolution of the panel is 240 to 330ppi for 2D images and 120 to 165ppi for 3D images. The brightness is 500cd/m2 for 2D images and about 250cd/m2 for 3D images. But it is possible to increase the brightness of the LED backlight only when 3D images are displayed, Sharp said. The resolution and the brightness of the 3D LCD display that the company was mass-producing in 2002 were 128 to 166ppi and 250cd/m2, respectively, for 2D images.
Furthermore, Sharp reduced cross-talk, a phenomenon where the images for the right and left eyes interfere with each other, by attaching the panel equipped with a parallax barrier to an LCD panel more accurately.
In regard to the second problem, the new 3D display has a touch panel integrated with the panel having a parallax barrier to reduce the thickness. Specifically, electrodes for a capacitive touch panel are formed on the front side of the panel, realizing a thickness equivalent to that of a touch-sensitive 2D LCD display.
As for the third problem, the 3D images shown by the new display can be viewed both in the longitudinal and horizontal directions by changing the control of the liquid crystal inside the parallax barrier in accordance with the tilt of the display. Also, passive drive elements are used to control the liquid crystal molecules inside the parallax barrier so that the transmittance does not lower as much as that of a display using active drive elements such as TFTs.
Silence on Nintendo 3DS
The new 3D display is expected to be used for the Nintendo 3DS, a portable game console that Nintendo Co Ltd is planning to release within fiscal 2010. The Nintendo 3DS allows users to view 3D images with the naked eye. Sharp has been providing its LCD panel for the Nintendo DS/DSi.
When asked about this at the press conference, Hasegawa said, "We would like to avoid commenting on our users' individual projects. We are now in talks with a mobile phone maker. But we cannot comment on businesses with game makers because, if we did, you could easily guess the name of a company."