Apparatus and method for adjusting video display

Details Apparatus and method for adjusting video display Apparatus and method for adjusting video display

1993-12-23

1995-12-12

Groody, James J.

Television

Video display

Projection device

348746, H04N 928, H04N 931

Patent

active

054754470

ABSTRACT:
An apparatus and a method for adjusting a video display, device with no need to determine precisely the positional relationship between an image producing element and the video display area of a projector or monitor while the latter device is being adjusted for video display by detecting beam positions. The entire video display area is detected by a image input. Camera and the video display area information thus obtained is represented by the coordinates, in a memory, of four points enclosing the area. The memory coordinates of the first points to be obtained based on a reference image are calculated from the coordinates of these four points. The coordinates of the first points are compared with those of the second points determined with respect to the reference image. The result is used to operate a system controller for adjustment and control of the video display device.

REFERENCES:
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patent: 5091773 (1992-02-01), Fouche et al.
patent: 5231481 (1993-07-01), Eollzan et al.
Patent Abstracts of Japan, vol. 12, No. 385, Oct. 14, 1988, (Ooya).
Patent Abstracts of Japan, vol. 8, No. 135, Jun. 22, 1984, (Oonishi).

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