Zooming position on-screen display device for camcorders

Details Zooming position on-screen display device for camcorders Zooming position on-screen display device for camcorders

1991-04-23

1993-02-09

Razavi, Michael T.

Facsimile and static presentation processing

Facsimile

Recording apparatus

358209, 358224, H04N 5232

Patent

active

051856700

ABSTRACT:
An on-screen display for a camcorder comprising a zoom motor, a zoom motor gear, a zoom gear, a zoom lens, a microcomputer adapted for outputting switching control output signals, an on-screen display character signal generator adapted for generating on-screen display character signal, a luminance/color processing circuit adapted for outputting composite video signal, a zooming position detector device which comprises a variable resistor and a variable resistor gear, a reference voltage variation unit which comprises a plurality of transistors and a plurality of emitter resistors and a ground resistor, a comparison unit which comprises a comparator having an inversion input terminal and a non-inversion input terminal. The present invention can provide an on-screen display for a camcorder which can prevent the user from missing the important scene and provide good pictures which are prevented from being shaken and out of composition.

REFERENCES:
patent: 4446526 (1984-05-01), Iwanade
patent: 4527201 (1985-07-01), Cappels
patent: 4589031 (1986-05-01), Tsuji
patent: 4739411 (1988-04-01), Bolton
patent: 4855782 (1989-08-01), Kobayashi et al.
patent: 4963907 (1990-10-01), Inoue et al.
patent: 4999713 (1991-03-01), Ueno et al.
patent: 5041860 (1991-08-01), Kobayashi et al.

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