Projection display apparatus and digital zooming method thereof

Details Projection display apparatus and digital zooming method thereof Projection display apparatus and digital zooming method thereof

2006-07-26

2008-10-21

Dowling, William C. (Department: 2851)

Optics: image projectors

Methods

C353S122000, C345S620000, C345S667000

Reexamination Certificate

active

07438426

ABSTRACT:
A projection display apparatus and digital zooming method thereof is disclosed. The projection display apparatus receives a first image and includes a control unit, an image processor, an image scaler, a projection lens and a display unit. The control unit is for calculating an image area needed to be removed from the first image according to a zooming multiple. The image processor is for removing the image area form the first image to generate a second image. The image scaler is for scaling the second image to generate a third image. The display unit is for receiving the third image and projecting the third image onto a screen via the projection lens. The third image has a specific pixel count relative to the display unit.

REFERENCES:
patent: 7093940 (2006-08-01), Kubo et al.
patent: 7150536 (2006-12-01), Inoue
patent: 7237903 (2007-07-01), Nagayoshi
patent: 2005/0180655 (2005-08-01), Ohta et al.
patent: 2006/0007244 (2006-01-01), Matsumoto

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