Development of optical film for eliminating the ghost image on the cover window for the convex display system.

In this study, we have studied a method to evaluate the image quality of a convex display and developed a film that can eliminate the ghost image which is pointed out as the biggest problem of image quality deterioration. The brightness uniformity of the screen varies greatly depending on the measurement position due to the shape of the curved surface display, and the unwanted ghost image is generated by the cover window attached to the curved display. The ghost image can be eliminated considerably by attaching a film having a groove structure, and it is possible to develop an efficient shape on film by controlling the size of the groove structure. As a result, the brightness of the ghost image could be reduced from 39.1 cd/m2 to 4.8 cd/m2, and four splitted images with sharp edges could be displayed as a small blur at the edge, so it possible to improve readability and sharpness of convex display. [ABSTRACT FROM AUTHOR]