From VIE (written by Alex Lux) - Sharp Actius RD3D laptop- Introduced in 2003, the Sharp RD3D used triple-layer display technology to provide a visually enhanced 3-D computing experience. A middle layer was sandwiched between two LCD screens, which provided visual stimuli to the users' right and left eyes, respectively. This buffer layer provided the means to simulate a 3-D experience without requiring 3-D glasses. Eye placement in front the screen, however, had to be precise to achieve the 3-D effect. Even with correct positioning, eye fatigue and motion sickness were reported as frequent side effects.
The RD3D was heavy--it weighed almost 12 pounds, including its added accessories--and it had a battery life of only two hours.