Patent US5745810A successfully refreshed from Google Patents.
US5745810A
Expired / Lapsed
US
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Image taking apparatus
Assignee: Canon Inc
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Filing: 1997-03-17
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Granted: 1998-04-28
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Expires: 2017-03-17
Abstract
Abstract An image taking apparatus including a photometry device that detects a luminance value for each of a plurality of areas of a photometric field, a selection circuit that selects one of the plurality of areas to be a reference area, a computing circuit that computes a difference value for each of the plurality of areas, each difference value representing a difference between the luminance value for a respective area and the luminance value for the reference area, and a display device that respectively displays the difference values for each of the plurality of areas.
Inventors
- 👤 Hiroshi Matsushima
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:06
CPC Classifications
G; G03; G03B; G03B13/00; G03B13/02; G03B7/00; G03B7/08; G03B7/099; G03B7/0993; G03B7/0997; G03B7/09979; G03B7/28; G03B2213/00; G03B2213/02; G03B2213/025
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
128 words
An image taking apparatus comprising: an image recording device that records an image of an object; a finder through which a user views said object, said finder having a field of view; a photometry device that divides an area in the field of view of said finder into a plurality of divided areas and detects a luminance of each of said plurality of divided areas; a detecting device that detects a specific one of the plurality of divided areas which includes a visual axis of a user; and a display device that respectively displays in each of the plurality of divided areas a difference between the luminance of each of said plurality of divided areas and the luminance of the specific one of the plurality of divided areas.
Claim 2
Dependent Claim
128 words
An image taking apparatus comprising: an image recording device that records an image of an object; a finder through which a user views said object, said finder having a field of view; a photometry device that divides an area in the field of view of said finder into a plurality of divided areas and detects a luminance of each of said plurality of divided areas; a detecting device that detects a specific one of the plurality of divided areas which includes a visual axis of a user; and a display device that respectively displays in each of the plurality of divided areas a difference between the luminance of each of said plurality of divided areas and the luminance of the specific one of the plurality of divided areas.
Claim 3
Dependent Claim
25 words
An image taking apparatus according to claim 1, wherein said display device changes a display format in accordance with an output from said detecting device.
Claim 4
Dependent Claim
46 words
An image taking apparatus according to claim 1, wherein said display device displays said specific one of the plurality of divided areas to which the visual axis corresponds differently than other ones of said plurality of divided areas to which the visual axis does not correspond.
Claim 5
Dependent Claim
51 words
An image taking apparatus according to claim 3, wherein said display device blinks on and off in said specific one of the plurality of divided areas to which the visual axis corresponds, and illuminates divided areas of the plurality of divided areas other than said specific one of the divided areas.
Claim 6
Independent Claim
127 words
A method for displaying a luminance distribution of a photometric field using an image taking apparatus having a finder with a plurality of display sections corresponding to respective areas of the photometric field, said method comprising the steps of: determining a luminance value for each of the respective areas; designating one of the respective areas to be a reference area using a visual axis of a user of the image taking apparatus; computing a difference value for each of the respective areas other than the reference area, each difference value representing a difference between the luminance value for a respective area and the luminance value for the reference area; and displaying the difference value for each of the respective areas in corresponding display sections of the finder.
Claim 7
Independent Claim
127 words
A method for displaying a luminance distribution of a photometric field using an image taking apparatus having a finder with a plurality of display sections corresponding to respective areas of the photometric field, said method comprising the steps of: determining a luminance value for each of the respective areas; designating one of the respective areas to be a reference area using a visual axis of a user of the image taking apparatus; computing a difference value for each of the respective areas other than the reference area, each difference value representing a difference between the luminance value for a respective area and the luminance value for the reference area; and displaying the difference value for each of the respective areas in corresponding display sections of the finder.
Claim 8
Dependent Claim
119 words
A camera comprising: an image recording device that records an image of an object; a finder through which the object is viewed, said finder having a field of view; a photometry device that divides an area of the field of view into a plurality of divided areas and detects a luminance of each of the plurality of divided areas; a detecting device that detects from among the plurality of divided areas a specific divided area which includes a visual axis of a user; and a display device that respectively displays in each of the divided areas other than the specific divided area a difference between the luminance of the divided area and the luminance of the specific divided area.
Claim 9
Dependent Claim
119 words
A camera comprising: an image recording device that records an image of an object; a finder through which the object is viewed, said finder having a field of view; a photometry device that divides an area of the field of view into a plurality of divided areas and detects a luminance of each of the plurality of divided areas; a detecting device that detects from among the plurality of divided areas a specific divided area which includes a visual axis of a user; and a display device that respectively displays in each of the divided areas other than the specific divided area a difference between the luminance of the divided area and the luminance of the specific divided area.
Claim 10
Dependent Claim
23 words
A camera according to claim 6, wherein said display device changes a display format in accordance with an output from said detecting device.
Claim 11
Dependent Claim
31 words
A camera according to claim 6, wherein said display device displays said specific divided area in a format different from that of other divided areas of the plurality of divided areas.
Claim 12
Dependent Claim
29 words
A camera according to claim 8, wherein said display means blinks on and off in said specific divided area, and illuminates divided areas other than said specific divided area.
Claim 13
Dependent Claim
94 words
An image taking apparatus comprising: a photometry device that detects a luminance value for each of a plurality of areas of a photometric field; a selection circuit that selects one of the plurality of areas to be a reference area; a computing circuit that computes a difference value for each of the plurality of areas, each difference value representing a difference between the luminance value for a respective area and the luminance value for the reference area; and a display device that respectively displays the difference values for each of the plurality of areas.
Claim 14
Dependent Claim
94 words
An image taking apparatus comprising: a photometry device that detects a luminance value for each of a plurality of areas of a photometric field; a selection circuit that selects one of the plurality of areas to be a reference area; a computing circuit that computes a difference value for each of the plurality of areas, each difference value representing a difference between the luminance value for a respective area and the luminance value for the reference area; and a display device that respectively displays the difference values for each of the plurality of areas.
Claim 15
Independent Claim
113 words
A method for displaying a luminance distribution of a photometric field using an image taking apparatus having a finder with a plurality of display sections corresponding to respective areas of the photometric field, said method comprising the steps of: determining a luminance value for each of the respective areas; designating one of the respective areas to be a reference area; computing a difference value for each of the respective areas, each difference value representing a difference between the luminance value for a respective area and the luminance value for the reference area; and displaying respective difference values for each of the respective areas in the corresponding plurality of display sections of the finder.
Claim 16
Independent Claim
113 words
A method for displaying a luminance distribution of a photometric field using an image taking apparatus having a finder with a plurality of display sections corresponding to respective areas of the photometric field, said method comprising the steps of: determining a luminance value for each of the respective areas; designating one of the respective areas to be a reference area; computing a difference value for each of the respective areas, each difference value representing a difference between the luminance value for a respective area and the luminance value for the reference area; and displaying respective difference values for each of the respective areas in the corresponding plurality of display sections of the finder.
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) | 2001-04-27 | 2001-10-27 | 2002-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-04-27 | 2005-10-27 | 2006-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-04-27 | 2009-10-27 | 2010-04-28 | $7700.00 | Window Closed / Lapsed |