| 摘要 |
<p>PURPOSE: A display board unit is provided to enable users to selectively see images in one space, thereby improving convenience of the users. CONSTITUTION: An image is formed on the first substrate(1). The first case(2) is combined with the first substrate. The first case prepares the first controller for forming an image on the first substrate. The second case(4) is combined with the second substrate(3). The second case prepares the second controller for forming an image on the second substrate.</p> |
