Patent US5424798A successfully refreshed from Google Patents.
US5424798A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Color temperature adjusting device
Assignee: Nikon Corp
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Filing: 1994-03-07
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Granted: 1995-06-13
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Expires: 2014-03-07
Abstract
Abstract A color temperature adjusting device for an auxiliary light source comprises a color temperature metering device for measuring a color temperature of an object field and a color temperature adjuster for adjusting a color temperature of the auxiliary light source in accordance with the color temperature measured by the color temperature metering device.
Inventors
- 👤 Tadao Takagi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 16:34
CPC Classifications
G; G01; G01J; G01J1/00; G01J1/02; G01J1/08; G01J1/42; G03; G03B; G03B15/00; G03B15/02; G03B15/03; G03B19/00; G03B19/02; G03B19/12; H; H04; H04N; H04N23/00; H04N23/70; H04N23/74; H04N23/80; H04N23/84; H04N23/88; H05; H05B; H05B45/00; H05B45/20
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
68 words
A color temperature adjusting device for an auxiliary light source, comprising: color temperature metering means for measuring a color temperature of an object field; and color temperature adjusting means for adjusting a color temperature of said auxiliary light source toward the color temperature measured by said color temperature metering means only when the color temperature measured by said color temperature metering means is lower than a predetermined temperature.
Claim 2
Dependent Claim
68 words
A color temperature adjusting device for an auxiliary light source, comprising: color temperature metering means for measuring a color temperature of an object field; and color temperature adjusting means for adjusting a color temperature of said auxiliary light source toward the color temperature measured by said color temperature metering means only when the color temperature measured by said color temperature metering means is lower than a predetermined temperature.
Claim 3
Dependent Claim
95 words
A color temperature adjusting device for an auxiliary light source, comprising: a color temperature metering device which measures a color temperature of an object field; and color temperature adjusting circuitry which adjusts a color temperature of said auxiliary light source toward the color temperature measured by said color temperature metering device, wherein said color temperature adjusting circuitry has a color temperature setting component for manual inputting of a desired color temperature by a user and adjusts the color temperature of said auxiliary light source toward the color temperature input by said color temperature setting component.
Claim 4
Dependent Claim
95 words
A color temperature adjusting device for an auxiliary light source, comprising: a color temperature metering device which measures a color temperature of an object field; and color temperature adjusting circuitry which adjusts a color temperature of said auxiliary light source toward the color temperature measured by said color temperature metering device, wherein said color temperature adjusting circuitry has a color temperature setting component for manual inputting of a desired color temperature by a user and adjusts the color temperature of said auxiliary light source toward the color temperature input by said color temperature setting component.
Claim 5
Dependent Claim
80 words
A color temperature adjusting device for an auxiliary light source, comprising: a color temperature metering device which measures a color temperature of an object field; and color temperature adjusting circuitry which adjusts a color temperature of said auxiliary light source toward the color temperature measured by said color temperature metering device, wherein said color temperature metering device and said color temperature adjusting circuitry are provided with said auxiliary light source in a unit attachable to and detachable from a camera.
Claim 6
Dependent Claim
80 words
A color temperature adjusting device for an auxiliary light source, comprising: a color temperature metering device which measures a color temperature of an object field; and color temperature adjusting circuitry which adjusts a color temperature of said auxiliary light source toward the color temperature measured by said color temperature metering device, wherein said color temperature metering device and said color temperature adjusting circuitry are provided with said auxiliary light source in a unit attachable to and detachable from a camera.
Claim 7
Dependent Claim
78 words
A color temperature adjusting device for an auxiliary light source, comprising: a color temperature metering device which measures a color temperature of an object field; and color temperature adjusting circuitry which adjusts a color temperature of said auxiliary light source toward the color temperature measured by said color temperature metering device, wherein said color temperature adjusting circuitry adjusts the color temperature of said auxiliary light source by adjusting an inductance in a circuit of said auxiliary light source.
Claim 8
Dependent Claim
78 words
A color temperature adjusting device for an auxiliary light source, comprising: a color temperature metering device which measures a color temperature of an object field; and color temperature adjusting circuitry which adjusts a color temperature of said auxiliary light source toward the color temperature measured by said color temperature metering device, wherein said color temperature adjusting circuitry adjusts the color temperature of said auxiliary light source by adjusting an inductance in a circuit of said auxiliary light source.
Claim 9
Dependent Claim
100 words
A color temperature adjusting device for an auxiliary light source, comprising: a color temperature metering device which measures a color temperature of an object field; and color temperature adjusting circuitry which adjusts a color temperature of said auxiliary light source toward the color temperature measured by said color temperature metering device, wherein said color temperature adjusting circuitry has a first adjustable-transmittance liquid crystal filter having a first hue and a second adjustable-transmittance liquid crystal filter having a second hue and adjusts the color temperature of said auxiliary light source by applying voltage to said first and second liquid crystal filters.
Claim 10
Dependent Claim
100 words
A color temperature adjusting device for an auxiliary light source, comprising: a color temperature metering device which measures a color temperature of an object field; and color temperature adjusting circuitry which adjusts a color temperature of said auxiliary light source toward the color temperature measured by said color temperature metering device, wherein said color temperature adjusting circuitry has a first adjustable-transmittance liquid crystal filter having a first hue and a second adjustable-transmittance liquid crystal filter having a second hue and adjusts the color temperature of said auxiliary light source by applying voltage to said first and second liquid crystal filters.
Claim 11
Dependent Claim
19 words
A device according to claim 5, wherein said first and second liquid crystal filters have a common optical axis.
Claim 12
Dependent Claim
29 words
A device according to claim 5, wherein said first and second liquid crystal filters are arranged in series in a path of light emitted by said auxiliary light source.
Claim 13
Dependent Claim
75 words
A color temperature adjusting device for an auxiliary light source, comprising: a color temperature metering device which measures a color temperature of an object; and color temperature adjusting circuitry which adjusts a color temperature of said auxiliary light source based on the color temperature measured by said color temperature metering device, wherein said color temperature adjusting circuitry includes an adjustable-transmittance liquid crystal filter having a hue and disposed in a path of said auxiliary light.
Claim 14
Dependent Claim
75 words
A color temperature adjusting device for an auxiliary light source, comprising: a color temperature metering device which measures a color temperature of an object; and color temperature adjusting circuitry which adjusts a color temperature of said auxiliary light source based on the color temperature measured by said color temperature metering device, wherein said color temperature adjusting circuitry includes an adjustable-transmittance liquid crystal filter having a hue and disposed in a path of said auxiliary light.
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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) | 1998-06-12 | 1998-12-12 | 1999-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-06-12 | 2002-12-12 | 2003-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-06-12 | 2006-12-12 | 2007-06-13 | $7700.00 | Window Closed / Lapsed |