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US 12,601,865 B2Granted
Split NVIS filter design
AssigneeRockwell Collins, Inc.
InventorRicky J. Johnson
Life of this patent
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Abstract
A display includes a split night visions imaging system (NVIS) filter, including a first and second interference filter. The first interference filter is disposed between a backlight and a diffuser of the display. The second interference filter is disposed between the diffuser and an LCD stack of the display. A cutoff wavelength of the second interference filter is between cutoff wavelengths of the first interference filter.
Claims15
A display comprising:
- a backlight comprising one or more light emitting diodes (LEDs) configured to generate light;
- a first interference filter;
- wherein the first interference filter comprises a first cutoff wavelength and a second cutoff wavelength;
- wherein the second cutoff wavelength of the first interference filter is greater than the first cutoff wavelength of the first interference filter;
- a diffuser;
- wherein the first interference filter is between the backlight and the diffuser;
- a second interference filter;
- wherein the diffuser is between the first interference filter and the second interference filter;
- wherein the second interference filter comprises a first cutoff wavelength;
- wherein the first cutoff wavelength of the second interference filter is between the first cutoff wavelength of the first interference filter and the second cutoff wavelength of the first interference filter;
- and
- an LCD stack;
- wherein the second interference filter is between the diffuser and the LCD stack.
10 more elements
A cockpit comprising:
- one or more flight displays comprising:
- a backlight comprising one or more light emitting diodes (LEDs) configured to generate light;
- a first interference filter;
- wherein the first interference filter comprises a first cutoff wavelength and a second cutoff wavelength;
- wherein the second cutoff wavelength of the first interference filter is greater than the first cutoff wavelength of the first interference filter;
- a diffuser;
- wherein the first interference filter is between the backlight and the diffuser;
- a second interference filter;
- wherein the diffuser is between the first interference filter and the second interference filter;
- wherein the second interference filter comprises a first cutoff wavelength;
- wherein the first cutoff wavelength of the second interference filter is between the first cutoff wavelength of the first interference filter and the second cutoff wavelength of the first interference filter;
- and
- an LCD stack;
- wherein the second interference filter is between the diffuser and the LCD stack.
11 more elements
Dependencies are inferred from the claim text.