Signaling system having improved contrast ration
First Claim
1. A signaling system for being viewed by a viewer in a viewing direction, said signaling system comprising:
- at least one light-emitting device comprising a transparent housing, at least one reflector, and at least one light-emitting part located within a boundary of an interior of said housing defined by a perimeter edge of said housing, wherein said light-emitting device, in operational use, is configured for emitting radiation with a light distribution forming a solid angle in space, said solid angle includes a center line defined as an optical axis of said light-emitting device, said reflector and said light-emitting part being configured for generating said radiation with said light distribution; and
at least one blocking means arranged substantially on a surface of said transparent housing of said light-emitting device, said blocking means being configured for individually blocking, in operational use, at least part of said radiation emitted by said light-emitting device in a direction substantially parallel to said optical axis, wherein said surface is defined with respect to a fictitious plane through said optical axis.
1 Assignment
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Accused Products
Abstract
The invention relates to a signaling system comprising at least one light-emitting device (1) for showing a signal or warning to a viewer (99), wherein, in operational use, the light-emitting device (1) is configured for emitting radiation with a light distribution forming a solid angle in space, wherein a center line of the solid angle is defined as an optical axis (Z) of the light-emitting device (1). The light-emitting device (1) comprises a transparent housing (3), a reflector (5) and a light-emitting part (7) arranged within the housing (3), wherein the reflector (5) and the light-emitting part (7) are configured for generating the radiation with said light distribution. The signaling system further comprises blocking means (10) are arranged substantially at one side of the light-emitting device (1). The blocking means (10) are configured for individually blocking, in operational use, at least part of the radiation emitted by the light-emitting device (1) in a direction substantially parallel to the optical axis (Z), wherein the one side is defined with respect to a fictitious plane through the optical axis (Z). The invention further relates to various applications of such signaling system. Despite the lower luminance of the light-emitting device, the invention provides for a higher-contrast ratio in case of a low-angled sun with respect to the optical axis (Z).
8 Citations
20 Claims
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1. A signaling system for being viewed by a viewer in a viewing direction, said signaling system comprising:
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at least one light-emitting device comprising a transparent housing, at least one reflector, and at least one light-emitting part located within a boundary of an interior of said housing defined by a perimeter edge of said housing, wherein said light-emitting device, in operational use, is configured for emitting radiation with a light distribution forming a solid angle in space, said solid angle includes a center line defined as an optical axis of said light-emitting device, said reflector and said light-emitting part being configured for generating said radiation with said light distribution; and at least one blocking means arranged substantially on a surface of said transparent housing of said light-emitting device, said blocking means being configured for individually blocking, in operational use, at least part of said radiation emitted by said light-emitting device in a direction substantially parallel to said optical axis, wherein said surface is defined with respect to a fictitious plane through said optical axis. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A signaling device comprising:
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at least one light-emitting device comprising a transparent housing, at least one reflector, and at least one light-emitting part arranged within said housing, wherein said light-emitting device, in operational use, is configured for emitting radiation with a light distribution forming a solid angle in space, said solid angle includes a center line defined as an optical axis of said light-emitting device, said reflector and said light-emitting part being configured for generating said radiation with said light distribution; and at least one light blocking element having a substantially spherical configuration to diffract ambient light in all directions, said light blocking element overlaps with said light-emitting device when projected into a direction of said optical axis onto a surface perpendicular to said optical axis, said light blocking element being arranged substantially at one side of said light-emitting device, said light blocking element being configured for individually blocking, in operational use, at least part of said radiation emitted by said light-emitting device in a direction substantially parallel to said optical axis, wherein said one side is defined with respect to a fictitious plane through said optical axis. - View Dependent Claims (17, 18, 19, 20)
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Specification