Sculptured transflector for dual mode active matrix liquid crystal display backlight
First Claim
1. An avionics display for use in the cockpit of an aircraft, the display comprising:
- a liquid crystal display device;
a day mode light source positioned on a first side of the liquid crystal display device and adapted to controllably provide a first source of light for use by the liquid crystal display device in displaying information during day mode operations;
a night mode light source positioned on the first side of the liquid crystal display device and adapted to controllably provide a second source of light for use by the liquid crystal display device in displaying information during night mode operations; and
a sculptured transflector positioned between the day mode light source and the night mode light source, a first side of the sculptured transflector adjacent the day mode light source having a transflective material thereon and forming a plurality of arcuate surfaces, wherein the transflective material and the plurality of arcuate surfaces are adapted to maximize a percentage of light from the day mode light source which is reflected toward the liquid crystal display device.
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Accused Products
Abstract
Disclosed are a backlight and avionics display using the same to provide light to a liquid crystal display (LCD) device. In the backlight, a day mode light source positioned on a first side of the LCD device and adapted to provide a first source of light for use by the LCD device during day mode operations. A night mode light source positioned on the first side of the LCD device is adapted to provide a second source of light for use by the LCD device during night mode operations. A sculptured transflector positioned between the day mode light source and the night mode light source has, at a first side adjacent the day mode light source, a transflective material and a plurality of arcuate or parabolic surfaces in order to maximize a percentage of light from the day mode light source which is reflected toward the LCD device.
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Citations
20 Claims
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1. An avionics display for use in the cockpit of an aircraft, the display comprising:
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a liquid crystal display device; a day mode light source positioned on a first side of the liquid crystal display device and adapted to controllably provide a first source of light for use by the liquid crystal display device in displaying information during day mode operations; a night mode light source positioned on the first side of the liquid crystal display device and adapted to controllably provide a second source of light for use by the liquid crystal display device in displaying information during night mode operations; and a sculptured transflector positioned between the day mode light source and the night mode light source, a first side of the sculptured transflector adjacent the day mode light source having a transflective material thereon and forming a plurality of arcuate surfaces, wherein the transflective material and the plurality of arcuate surfaces are adapted to maximize a percentage of light from the day mode light source which is reflected toward the liquid crystal display device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An avionics display for use in the cockpit of an aircraft, the display comprising:
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a liquid crystal display device; a day mode light source positioned on a first side of the liquid crystal display device and adapted to controllably provide a first source of light for use by the liquid crystal display device in displaying information during day mode operations; a night mode light source positioned on the first side of the liquid crystal display device and adapted to controllably provide a second source of light for use by the liquid crystal display device in displaying information during night mode operations; a sculptured transflector positioned between the day mode light source and the night mode light source, a first side of the sculptured transflector adjacent the day mode light source having a transflective material thereon and forming a plurality of parabolic surfaces, wherein the transflective material and the plurality of parabolic surfaces are adapted to maximize a percentage of the first source of light from the day mode light source which is reflected toward the liquid crystal display device; and a night vision imaging system (NVIS) filter positioned between the night mode light source and the day mode light source such that the NVIS filter absorbs substantially all portions of the second source of light provided by the night mode light source which have a wavelength of greater than about 630 nanometers, but does not absorb the first source of light provided by the day mode light source. - View Dependent Claims (11, 12, 13, 14)
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15. A backlight for backlighting a liquid crystal display, the backlight comprising:
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a day mode light source adapted to controllably provide a first source of light for use by the liquid crystal display device in displaying information during day mode operations; a night mode light source adapted to controllably provide a second source of light for use by the liquid crystal display device in displaying information during night mode operations; a sculptured transflector positioned between the day mode light source and the night mode light source, a first side of the sculptured transflector adjacent the day mode light source having a transflective material thereon and forming a plurality of arcuate surfaces, wherein the transflective material and the plurality of arcuate surfaces are adapted to maximize a percentage of the first source of light from the day mode light source which will be reflected toward the liquid crystal display device; and a night vision imaging system (NVIS) filter positioned between the night mode light source and the day mode light source such that the NVIS filter absorbs substantially all portions of the second source of light provided by the night mode light source which have a wavelength of greater than about 630 nanometers, but does not absorb the first source of light provided by the day mode light source. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification