Projection display

Details Projection display Projection display

2011-03-15

2011-03-15

Harrington, Alicia M (Department: 2873)

Optical: systems and elements

Single channel simultaneously to or from plural channels

By partial reflection at beam splitting or combining surface

C345S007000

Reexamination Certificate

active

07907342

ABSTRACT:
A projection display is provided including a rod-like waveguide (7), an image providing light source device (10) located at a first side (9) of the waveguide (7) to inject image bearing light into the waveguide (7), through the first side (9). An input means (12) is provided on the waveguide (7) adjacent one end (13) at a second side (14) opposite to the first side (9) to reflect the image bearing light internally along the waveguide (7). An output transmission grating (18) is provided along a third side (19) of the waveguide (7) through which image bearing light is outputted from the waveguide (7). A plate-like waveguide (8) is located with an edge surface (23) thereof adjacent to and in line with the third side (19) of the waveguide (7) to receive the image bearing light from the waveguide (7). The waveguide (8) includes an exit grating (25) on or at a first surface (26) thereof for diffracting the received image bearing light out of the waveguide (8) towards a viewer (6).

REFERENCES:
patent: 5668913 (1997-09-01), Tai et al.
patent: 6796669 (2004-09-01), Masuda
patent: 2004/0130797 (2004-07-01), Travis
patent: 2005/0180687 (2005-08-01), Amitai
patent: WO 2004/109349 (2004-12-01), None

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