On-screen displaying apparatus having zoom function

Details On-screen displaying apparatus having zoom function On-screen displaying apparatus having zoom function

1992-09-10

1994-05-10

Groody, James J.

Television

Image signal processing circuitry specific to television

Special effects

358231, 348204, 348745, H04N 5262, H04N 5272, H04N 5460

Patent

active

053113160

ABSTRACT:
A projection type imaging display system utilizing a liquid crystal panel projector. The zoom position of a projection lens is detected as an indicator of the aspect ratio of the main image being projected. Based on the zoom position, the position of an information display signal superimposed upon the main image is adjusted relative to the position of the main image, so that the information display signal is displayed on the main image no matter what the aspect ratio of the main image is.

REFERENCES:
patent: 4231066 (1980-10-01), Merchant
patent: 4527201 (1985-06-01), Cappels
patent: 4722007 (1988-01-01), Fling
patent: 4843475 (1989-06-01), Imai
patent: 4864405 (1989-09-01), Chambers
Television Gijutsu, Jun. 1991, pp. 26-32.

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