Electronic stereoscopic viewing device
Viewer having head mounted display unit for cinerama pictures
Passenger vehicle polling system having a central unit for polling passenger seat terminal units
Stereoscopic video image display appliance wearable on head like spectacles
Dual image head-mounted display Patent #: 5334991
ApplicationNo. 169362 filed on 12/20/1993
US Classes:349/13, Liquid crystal eyewear (glasses, goggles, etc.)345/8, Operator body-mounted heads-up display (e.g., helmet mounted display)351/158, Combined359/630Superimposing visual information on observer`s field of view (e.g., head-up arrangement, etc.)
ExaminersPrimary: Gross, Anita Pellman
Assistant: Dudek, James A.
Attorney, Agent or Firm
Foreign Patent References
International ClassesG02F 001/133
Foreign Application Priority Data1992-12-25 JP
AbstractDisclosed is a head-mount type display apparatus having an optical system which is of the back-irradiation type by which the user can see an extremely high-quality video image and by which the user makes only in-focus adjustment thereby improving operation convenience. The head-mount type display apparatus includes at least two optical systems each including a light source, a LCD through which the light from the light source is passed, a reflecting plate which reflects the light passing through the LCD, a screen on the back side of which the reflected light from the reflecting plate is focused to form an image and a lens by which the light from the screen is focused to form an image at a viewing point, and a head-mount type member for supporting the two optical systems which are opposed to left and right eyes. According to the preferred embodiment, interference and distortion in the projected images arising from the image of the edges of the LCDs is substantially reduced.