White balance control system
Abstract
Abstract A WHITE BALANCE SYSTEM FOR A COLOR TELEVISION CAMERA IN WHICH A PLURALITY OF ADJUSTABLE POTENTIOMETERS ARE CONNECTED IN PARALLEL ACROSS THE OUTPUT LOAD OF A TRANSISTORIZED PHASE SPLITTING CIRCUIT FED BY A DELAYED FORM OF THE LUMINANCE SIGNAL. THE MOVABLE CONTACTS OF TEH POTENTIOMETERS ARE SEPARATELY CONNECTED TO THE FIXED CONTACTS OF A PAIR OF ROTARY SWITCHES WHOSE MOVABLE CONTACTS ARE GANGED. THE MOVABLE SWITCH CONTACTS ARE SEPARATELY CONNECTED THROUGH ADDING CIRCUITS TO THE COLOR DEMODULATOR CIRCUIT OF THE CAMERA SO THAT THE SIGNALS AP- PEARING AT THE MOVABLE CONTACTS OF A SELECTED PAIR OF THE POTENTIOMETERS ARE COMBINED WITH THE COLOR DIFFERENCE SIGNALS. THE SETTINGS OF THE POTENTIOMETERS COMPENSATE FOR PREDETERMINED LEVELS OF ILLUMINATIONT TO PRODUCE A PROPERLY WHITE BALANCED CHROMINANCE SIGNAL.
Inventors
- 👤 K Nakajima
Bibliographic Details
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-06-27 | 1977-12-27 | 1978-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-27 | 1981-12-27 | 1982-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-27 | 1985-12-27 | 1986-06-28 | $7700.00 | Window Closed / Lapsed |