Head-Up Display System
First Claim
1. A head-up display system for a vehicle, which also permits the vehicle driver to view selected objects that emit visible light only within a single restricted frequency band or spaced restricted frequency bands, the system comprising:
- a combiner that functions as a partial reflector, which is positioned in the line of sight of the driver and through which the driver can view the vehicle surroundings including the selected objects; and
a projector that projects a display onto the combiner, the projector emitting light only within a single restricted frequency band or spaced restricted frequency bands;
wherein the combiner is positioned to reflect light from the projector to the driver, the reflection characteristic of the combiner being such that it only reflects the incident light from the projector and transmits light at other frequencies; and
the/each frequency band within which light is reflected by the combiner does not substantially coincide with any frequency band within which light is emitted by the selected objects.
1 Assignment
0 Petitions
Accused Products
Abstract
A head-up display system for a vehicle includes a projector and a combiner in which a multilayer film is provided to reflect a display from the projector to the driver, the display being superimposed on the image of the vehicle surroundings that the driver receives through the vehicle windscreen. The display comprises light within a single restricted frequency band, or a plurality of spaced restricted frequency bands only. The frequency bands are selected to ensure that essential visual information which would normally be conveyed to the driver through the windscreen is not blocked by the multilayer film.
58 Citations
33 Claims
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1. A head-up display system for a vehicle, which also permits the vehicle driver to view selected objects that emit visible light only within a single restricted frequency band or spaced restricted frequency bands, the system comprising:
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a combiner that functions as a partial reflector, which is positioned in the line of sight of the driver and through which the driver can view the vehicle surroundings including the selected objects; and a projector that projects a display onto the combiner, the projector emitting light only within a single restricted frequency band or spaced restricted frequency bands; wherein the combiner is positioned to reflect light from the projector to the driver, the reflection characteristic of the combiner being such that it only reflects the incident light from the projector and transmits light at other frequencies; and the/each frequency band within which light is reflected by the combiner does not substantially coincide with any frequency band within which light is emitted by the selected objects. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A head-up display system for a vehicle equipped with a headlight that emits visible light only within spaced restricted frequency bands, the system comprising:
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a combiner that functions as a partial reflector, which is positioned in the line of sight of the driver and through which the driver can view the vehicle surroundings; and a projector that projects a display onto the combiner, the projector emitting light only within a single restricted frequency band or spaced restricted frequency bands; wherein the combiner is positioned to reflect light from the projector to the driver, the reflection characteristic of the combiner being such that it only reflects the incident light from the projector and transmits light at other frequencies; and the/each frequency band within which light is reflected by the combiner does not substantially coincide with any frequency band within which light is emitted by the vehicle headlight. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A head-up display system for a vehicle equipped with a headlight that emits a beam of infra-red radiation within a restricted frequency band, the system comprising:
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a combiner that functions as a partial reflector, which is positioned in the line of sight of the driver and through which the driver can view the vehicle surroundings; a camera positioned to receive infra-red radiation from the headlight following reflection by an object outside the vehicle, and operable to convert the infra-red radiation into a visible image of the object; and a projector that projects the visible image onto the combiner, the projector emitting light only within a single restricted frequency band or spaced restricted frequency bands; wherein the combiner is positioned to reflect light from the projector to the driver, the reflection characteristic of the combiner being such that it only reflects the incident light from the projector and transmits light at other frequencies. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33)
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Specification