| 摘要 |
PURPOSE:To offer a compact projection television receiver with large screen by forming the rear part of reflecting mirror as a trapezoidal form nearly where the width is narrower than that of the front part and narrowering the rear part width of a cabinet by the width difference between the rear part and the front part of the reflecting mirror than the front width. CONSTITUTION:The reflecting mirror 5 is fitted in the inside of the cabinet 4 via a bracket 6 and the cabinet 4 is formed as a trapezoidal form where the rear width of the reflecting mirror 5 is narrower than the front width to decrease the rear part of the cabinet 4 by the difference between the front width and the rear width of the reflecting mirror. Further, the light of a cathode ray tube 10 is expanded by a lens 9 and projected onto a screen 8 while being reflected on the reflecting mirrors 12, 11 and 5, and the optical path 7 of the light is narrowered as the path is kept away from the screen 8. Since the reflecting mirror 5 is fitted tilt to the screen 8, the width of the optical path 7 reflected at the rear part of the reflecting mirror 5 is narrower than the width of the optical path 7 reflected at the front part, then the optical path 7 is not shut even if the width of the rear part of the reflecting mirror is narrower than that of the front part and no effect is given to the picture image. |
