| 摘要 |
PURPOSE:To constitute with easy structure and thinly the screen cover closing opening mechanism equipped with the screen cover to cover freely openably closably both right and left side parts or both upper lower side parts of a screen to display selectively plural types of the video having the different aspect ratio and to stably move the screen cover. CONSTITUTION:Two rollers 5 and 5' to extend in upper and lower directions are arranged at the position of the outer side than both right and left side ends of a screen 2, a cover sheet 3 is wound in an endless type between two rollers, two windows 4 and 4' are formed at the position suitably separated in the length-wise direction at the cover sheet, the above-mentioned roller is rotated, the cover sheet is travelled, the quantity to overlap two windows is changed, and the right and left width W to see through the part to overlap the two windows is changed. |
