HEAD-UP DISPLAY FOR NIGHT VISION GOGGLES
First Claim
1. A head-up display system for a vehicle, the head-up display being configured for use with NVIS class B goggles, comprising:
- a semi-transparent combiner mirror;
an image source arranged to project an image on the semi-transparent combiner mirror;
an illumination unit comprising a first light source and a second light source for alternatively providing light to the image source, wherein the first light source comprises a first type of light emitting diode configured for use in daylight conditions, and wherein the second light source comprises a second type of light emitting diode configured for use during night vision conditions, the first type of light emitting diode having a dominating wavelength of emitted light of 625 nanometers and a half intensity bandwidth of 20 nanometers, the second type of light emitting diode having a dominating wavelength of emitted light of 590 nanometers and a half intensity bandwidth of 18 nanometers; and
a luminance control unit arranged to adjust a brightness of at least one of the image source or the first light source or the second light source currently in operation,wherein the semi-transparent combiner mirror comprises a coating configured to superimpose the projected image onto a view of an environment in front of the vehicle by transmitting light rays from the environment and simultaneously reflecting the projected image towards eyes of an observer, wherein the coating of the semi-transparent combiner mirror is centered at a wavelength of 625 nanometres and is provided with a half intensity bandwidth of 38 nanometers of the reflection.
1 Assignment
0 Petitions
Accused Products
Abstract
A head-up display system for a vehicle facilitating the use of night vision goggles for a person in the vehicle during night vision conditions. The system includes a light source for providing light to an image source. The image source is arranged to project an image on a semi-transparent combiner mirror. The combiner mirror is arranged to superimpose the projected image onto a view of the environment in front of the vehicle by transmitting light rays from the environment and at the same time reflecting the projected image towards the eyes of an observer. The system includes a first and a second light source for alternatively providing light to the image source. The first light source is arranged to emit light of a first color to be used during daylight conditions, and the second light source is arranged to emit light of a second color to be used during night vision conditions, wherein the second color is mainly yellow or mainly orange.
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Citations
25 Claims
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1. A head-up display system for a vehicle, the head-up display being configured for use with NVIS class B goggles, comprising:
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a semi-transparent combiner mirror; an image source arranged to project an image on the semi-transparent combiner mirror; an illumination unit comprising a first light source and a second light source for alternatively providing light to the image source, wherein the first light source comprises a first type of light emitting diode configured for use in daylight conditions, and wherein the second light source comprises a second type of light emitting diode configured for use during night vision conditions, the first type of light emitting diode having a dominating wavelength of emitted light of 625 nanometers and a half intensity bandwidth of 20 nanometers, the second type of light emitting diode having a dominating wavelength of emitted light of 590 nanometers and a half intensity bandwidth of 18 nanometers; and a luminance control unit arranged to adjust a brightness of at least one of the image source or the first light source or the second light source currently in operation, wherein the semi-transparent combiner mirror comprises a coating configured to superimpose the projected image onto a view of an environment in front of the vehicle by transmitting light rays from the environment and simultaneously reflecting the projected image towards eyes of an observer, wherein the coating of the semi-transparent combiner mirror is centered at a wavelength of 625 nanometres and is provided with a half intensity bandwidth of 38 nanometers of the reflection. - View Dependent Claims (9, 10, 11, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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Specification