Patent US5164759A successfully refreshed from Google Patents.
US5164759A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ttl automatic flash control camera
Assignee: Nikon Corp
•
Filing: 1991-06-28
•
Granted: 1992-11-17
•
Expires: 2011-06-28
Abstract
Abstract A TTL automatic flash control camera capable of effecting TTL multi-flash control comprises a built-in flash apparatus capable of effecting preliminary flashing, a photoelectric converter for detecting the reflected light distribution information of the area of the object field divided into a plurality of areas by the preliminary flashing of the built-in flash apparatus, a determining device for determining the degree of weighting to the divided areas by the reflected light distribution information, a connecting portion capable of mounting a flash-controllable accessory flash apparatus, and a flash control device for causing the built-in flash apparatus to effect the preliminary flashing, and causing the accessory flash apparatus being mounted to effect main flashing after the photoelectric converter detects the reflected light distribution information, and effecting the control of the quantity of emitted light during the main flashing by the use of the degree of weighting determined by the determining device.
Inventors
- 👤 Seiichi Yasukawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 05:34
CPC Classifications
G; G03; G03B; G03B15/00; G03B15/02; G03B15/03; G03B15/05; G03B7/00; G03B7/08; G03B7/099; G03B7/0993; G03B7/0997; G03B7/09971; G03B7/09974; G03B7/09979
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
162 words
A TTL automatic flash control camera including: first flashing means contained in the body of the camera and capable of effecting preliminary flashing prior to main flashing; photoelectric converting means for detecting the reflected light distribution information of the area of the object field divided into a plurality of areas by said preliminary flashing of said first flashing means; determining means for determining the degree of weighting to said divided areas by said reflected light distribution information; connecting means capable of mounting flash-controllable second flashing means; and flash control means capable of TTL multi-flash control for causing said first flashing means to effect said preliminary flashing, and causing said second flashing means being mounted to effect said main flashing after said photoelectric converting means detects said reflected light distribution information based on said preliminary flashing, and effecting the control of the quantity of emitted light during said main flashing by the use of the degree of weighting determined by said determining means.
Claim 2
Dependent Claim
162 words
A TTL automatic flash control camera including: first flashing means contained in the body of the camera and capable of effecting preliminary flashing prior to main flashing; photoelectric converting means for detecting the reflected light distribution information of the area of the object field divided into a plurality of areas by said preliminary flashing of said first flashing means; determining means for determining the degree of weighting to said divided areas by said reflected light distribution information; connecting means capable of mounting flash-controllable second flashing means; and flash control means capable of TTL multi-flash control for causing said first flashing means to effect said preliminary flashing, and causing said second flashing means being mounted to effect said main flashing after said photoelectric converting means detects said reflected light distribution information based on said preliminary flashing, and effecting the control of the quantity of emitted light during said main flashing by the use of the degree of weighting determined by said determining means.
Claim 3
Dependent Claim
237 words
A TTL automatic flash control camera including: flash-controllable first flashing means contained in the body of the camera and capable of effecting preliminary flashing prior to main flashing; photoelectric converting means for detecting the reflected light distribution information of the area of the object field divided into a plurality of areas by said preliminary flashing of said first flashing means; determining means for determining the degree of weighting to said divided areas by said reflected light distribution information; connecting means capable of mounting flash-controllable second flashing means; mounting detection means for detecting the presence or absence of said second flashing means mounted and producing a signal; and flash control means capable of TTL multi-flash control for causing said first flashing means to effect said preliminary flashing, and causing said second flashing means being mounted to effect said main flashing when said flash control means receives a signal indicative of the presence of said second flashing means from said mounting detection means after said photoelectric converting means detects said reflected light distribution information based on said preliminary flashing, and causing said first flashing means to effect said main flashing when said flash control means receives a signal indicative of the absence of said second flashing means from said mounting detection means, and effecting the control of the quantity of emitted light during said main flashing by the use of the degree of weighting determined by said determining means.
Claim 4
Dependent Claim
237 words
A TTL automatic flash control camera including: flash-controllable first flashing means contained in the body of the camera and capable of effecting preliminary flashing prior to main flashing; photoelectric converting means for detecting the reflected light distribution information of the area of the object field divided into a plurality of areas by said preliminary flashing of said first flashing means; determining means for determining the degree of weighting to said divided areas by said reflected light distribution information; connecting means capable of mounting flash-controllable second flashing means; mounting detection means for detecting the presence or absence of said second flashing means mounted and producing a signal; and flash control means capable of TTL multi-flash control for causing said first flashing means to effect said preliminary flashing, and causing said second flashing means being mounted to effect said main flashing when said flash control means receives a signal indicative of the presence of said second flashing means from said mounting detection means after said photoelectric converting means detects said reflected light distribution information based on said preliminary flashing, and causing said first flashing means to effect said main flashing when said flash control means receives a signal indicative of the absence of said second flashing means from said mounting detection means, and effecting the control of the quantity of emitted light during said main flashing by the use of the degree of weighting determined by said determining means.
Claim 5
Dependent Claim
53 words
A TTL automatic flash control camera according to claim 2, wherein said flash control means causes said first flashing means to effect said preliminary flashing and said main flashing by the same flashing portion when it receives the signal indicative of the absence of said second flashing means from said mounting detection means.
Claim 6
Dependent Claim
154 words
A TTL automatic flash control camera including: first flashing means contained in the body of the camera; connecting means capable of mounting flash-controllable second flashing means; photoelectric converting means for detecting the reflected light distribution information of the area of the object field divided into a plurality of areas by the preliminary flashing of said second flashing means prior to main flashing; determining means for determining the degree of weighting to said divided areas by said reflected light distribution information; and flash control means capable of TTL multi-flash control for causing said second flashing means to effect said preliminary flashing, and causing said first flashing means to effect said main flashing after said photoelectric converting means detects said reflected light distribution infromation based on said preliminary flashing, and effecting the control of the quantity of emitted light during said main flashing by the use of the degree of weighting determined by said determining means.
Claim 7
Dependent Claim
154 words
A TTL automatic flash control camera including: first flashing means contained in the body of the camera; connecting means capable of mounting flash-controllable second flashing means; photoelectric converting means for detecting the reflected light distribution information of the area of the object field divided into a plurality of areas by the preliminary flashing of said second flashing means prior to main flashing; determining means for determining the degree of weighting to said divided areas by said reflected light distribution information; and flash control means capable of TTL multi-flash control for causing said second flashing means to effect said preliminary flashing, and causing said first flashing means to effect said main flashing after said photoelectric converting means detects said reflected light distribution infromation based on said preliminary flashing, and effecting the control of the quantity of emitted light during said main flashing by the use of the degree of weighting determined by said determining means.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-11-17 | 1996-05-18 | 1996-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-11-17 | 2000-05-18 | 2000-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-11-17 | 2004-05-18 | 2004-11-17 | $7700.00 | Window Closed / Lapsed |