Projection type display device

Details Projection type display device Projection type display device

2005-01-18

2005-01-18

Dowling, William C. (Department: 2851)

Optics: image projectors

Distortion compensation

For projection axis inclined to screen

Reexamination Certificate

active

06843569

ABSTRACT:
In a projection type display device having an electrical trapezoidal distortion correcting function, there are provided detection means for detecting an angle of inclination in the vertical direction of an optical axis of the projection type display device toward a screen surface, and control means for controlling the display position of an on screen display image displayed in a screen on the basis of the angle of inclination detected by the detection means.

REFERENCES:
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patent: 6367933 (2002-04-01), Chen et al.
patent: 6416186 (2002-07-01), Nakamura
patent: 6450647 (2002-09-01), Takeuchi
patent: 6491400 (2002-12-01), Chen et al.
patent: 6511185 (2003-01-01), Gananathan
patent: 6527395 (2003-03-01), Raskar et al.

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