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US 12,230,620 B2Granted
Devices compatible with night vision equipment
AssigneeDolby Intellectual Property Licensing, LLC
InventorsJames Edward Murphy, Samuel Joseph Camardello
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AssigneeDolby Intellectual Property Licensing, LLC
InventorsJames Edward Murphy, Samuel Joseph Camardello
Estimating the term…
The present disclosure relates to a device used in conjunction with night vision equipment. The device including an LED light source optically coupled and/or radiationally connected to a phosphor material including a green-emitting phosphor and a red-emitting phosphor of formula I: AxMFy:Mn4+ I wherein A is Li, Na, K, Rb, Cs, or a combination thereof, M is Si, Ge, Sn, Ti, Zr, Al, Ga, In, Sc, Hf, Y, La, Nb, Ta, Bi, Gd, or a combination thereof, x is an absolute value of a charge of the MFy ion; and y is 5, 6 or 7. The device limits emission of wavelengths longer than 650 nm to less than 1.75% of total emission. A device including an LED light source optically coupled and/or radiationally connected to a red-emitting phosphor including Na2SiF6:Mn4+ is also provided.
A device used in conjunction with night vision equipment, the device comprising an LED light source optically coupled and/or radiationally connected to a phosphor material comprising a green-emitting phosphor and a red-emitting phosphor of formula I:
A device used in conjunction with night vision equipment, the device comprising an LED light source optically coupled and/or radiationally connected to a phosphor material including a red-emitting phosphor having the formula Na2SiF6:Mn4+, wherein the device limits emission of wavelengths longer than 650 nm to no more than 1.0% of total emission.
A display compatible with day lighting and compatible with night vision equipment, the display comprising a backlight apparatus comprising a device used in conjunction with night vision equipment, the device comprising an LED light source optically coupled and/or radiationally connected to a phosphor material including a red-emitting phosphor having the formula Na2SiF6:Mn4+, wherein the device limits emission of wavelengths longer than 650 nm to no more than 1.0% of total emission, and wherein (1) a color gamut in day lighting decreases by less than 20% when in use with night vision equipment;
Dependencies are inferred from the claim text.