Parallaxless input‐integrated flat panel display

Abstract

AbstractInput‐integrated displays with a tablet and liquid‐crystal display (LCD) have been developed for computers. In the input‐integrated displays, parallax due to the thickness of a glass causes the difference between the positions of a pen and the displayed image.To eliminate the parallax problem, a fiber plate was used for the upper substrate of an LCD instead of a conventional glass plate and the newly developed LCD was evaluated.(1) It was found that when a fiber glass was used for the upper substrate of the LCD and liquid‐crystal material with a polarization characteristic (for example, one with dichromatic coloring matter which has anisotropic characteristics in the absorption of visible light in the long and short axes directions of liquid‐crystal molecules), the parallax observed when a glass plate was used almost disappeared.(2) The relationship among the pen position, glass plate thickness, and dot‐pitch of an LCD for conventional LCDs was obtained. Using the relationship, it was clarified that the disturbance due to the parallax could be eliminated.