Directly viewable speed display system
First Claim
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1. A speed display system for use in a vehicle, intended to be operated by a sighted human operator, said operator having an optical focus point which is changeable, said display system comprising:
- at least one illumination device, the illumination of which represents a speed scale,at least one illumination device distinct from the first mentioned illumination device, the illumination of which represents an actual speed of the vehicle,means to cause illumination of said speed scale and said actual speed illumination devices,said illuminated speed scale and actual speed illumination devices being mounted in said vehicle so as to be directly viewable by the operator of the vehicle when the operator'"'"'s optical focus point is directed towards the path of the vehicle.
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Abstract
A directly viewable speed display device for vehicles is located within the visual field of an operator of the vehicle. The display device uses a light illumination source such as a lamp, light emitting diode or exit ends of light guides to denote the actual vehicle speed which can be compared to an illuminated scale. In its simplest form, the illuminated scale can be a single point of light and the light illumination source can also be a single point of light.
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Citations
14 Claims
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1. A speed display system for use in a vehicle, intended to be operated by a sighted human operator, said operator having an optical focus point which is changeable, said display system comprising:
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at least one illumination device, the illumination of which represents a speed scale, at least one illumination device distinct from the first mentioned illumination device, the illumination of which represents an actual speed of the vehicle, means to cause illumination of said speed scale and said actual speed illumination devices, said illuminated speed scale and actual speed illumination devices being mounted in said vehicle so as to be directly viewable by the operator of the vehicle when the operator'"'"'s optical focus point is directed towards the path of the vehicle. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A speed display system for use in a vehicle intended to be operated by a sighted human operator, said operator having an optical focus point which is changeable, said system comprising
means defining at least a single point of light indicating the actual vehicle speed in comparison to a preselected speed scale, said preselected speed scale comprising an illuminated scale, comprising a single point of light, said means and said illuminated scale being mounted within the field of vision of the operator'"'"'s optical focus.
Specification