| 摘要 |
PROBLEM TO BE SOLVED: To provide a video projection with excellent user-friendliness. SOLUTION: When a video projector 15 projects an inverted video image to a reflection mirror 21 on a rear side of an opening/closing cover 20 that is kept open about 45 degrees, an erect image about in a horizontal direction is projected and displayed on a screen. Since the video projector 15 is placed and fixed on an exhaust duct 14 while directing its projector lens 16 nearly right above, having only to open the opening/closing cover 20 fixing the reflection mirror 21 completes the preparation of projection. Furthermore, since the video projector 15 is provided with a video image inversion circuit, the erected video image can be projected by the reflection mirror 21 of the opening/closing cover 20 only. Moreover, since the opening/closing cover 20 is fitted to a ceiling plate 6 by using a free-stop hinge 19, the opening/closing cover 20 can be held at an optional angle and a user can simply adjust the angle of the reflection mirror 21, that is, the so-called tilt and shift angle while viewing an image projected onto the screen.
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