| 摘要 |
PURPOSE:To change the angle of a screen depending on the position of a viewer looking the screen, by linking the 2nd mirror and the screen for television picture projection incorporatedly and rotating the linked body up and down. CONSTITUTION:The television picture from a projective type cathode ray tube 1 is reflected on the 1st and the 2nd mirrors 2 and 3 and the picture is projected from the back side of a transparent screen 4. In the device, the 2nd mirror 3 and the screen 4 are linked incorporatedly with a linking arm 5 and a support metal fixture 7 of the 2nd mirror 3 is fixed to a nut built in the side surface of a cabinet 6 with a screw 8 allowing to make the entire linked body rotatable freely up and down by taking the central part of the 2nd mirror 3 as a fulcrum. In the figure, A is an optical axis when the screen 4 is placed vertically, B is an optical axis when the screen 4 is placed upward and C is an otical axis when the screen is placed downward. |
