Portable image display

Details Portable image display Portable image display

2006-03-07

2006-03-07

Cherry, Euncha P. (Department: 2872)

Optical: systems and elements

Prism

With reflecting surface

Reexamination Certificate

active

07009787

ABSTRACT:
The object of the invention is to make a viewing unit of the image display compact so that it can be mounted on portable telephones or information terminals. The portable image display of the invention comprises a speaker portion, a microphone portion, an image display device9and a viewing optical system for forming an exit pupil to view an image displayed on the image display device and having a generally positive refracting power. The viewing optical system is constructed of at least one prism member10comprising an entrance surface through which a light beam emanating from the image display device9is entered into the prism, at least one reflecting surface at which the light beam is reflected within the prism and an exit surface through which the light beam leaves the prism. The at least one reflecting surface has a curved surface shape for imparting power to a light beam. The curved surface shape is defined by a rotationally asymmetric surface shape capable of making correction for decentration aberrations.

REFERENCES:
patent: 5867795 (1999-02-01), Novis et al.
patent: 6085112 (2000-07-01), Kleinschmidt et al.
patent: 6275714 (2001-08-01), Kintz et al.
patent: 6323892 (2001-11-01), Mihara
patent: 6486862 (2002-11-01), Jacobsen et al.
patent: 6-294943 (1994-10-01), None

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