| 摘要 |
PURPOSE:To superimpose and display the left time of a lecture and an accessed character on a picture enlarged and projected to a screen in the lecture using an OHP as an equipment for presentation. CONSTITUTION:A display body 6 using liquid crystal is provided under the upper surface glass plate 5 of the OHP 3, and the time based on a time signal outputted from a timer device 1 and the accessed character read by a character reader are displayed on the display body 6, and enlarged and projected 10 to the screen with the picture 9 of the OHP. |
