Optical display element and display device
First Claim
1. An optical display element for luminous variable message signs or display boards, comprising:
- a substantially tubular housing disposed in an at least substantially horizontal orientation and having an input-side end, an output-side end, and a housing mid-axis extending in the substantially horizontal direction;
a receptacle for a light source disposed at said input-side end, said receptacle having an optical axis;
an exit region at said output-side end for light emitted by the light source; and
a plurality of optical elements each having an optical axis extending substantially horizontally, said optical elements including a lens or a cover and being disposed in a beam path of the light source between said receptacle and said exit region;
said receptacle and said optical elements being arranged relative to one another to define, from said receptacle to said exit region, a stepped height offset with respect to said housing mid-axis between said optical axes of each said optical elements and said optical axis of said receptacle, with each of said optical axes of said optical elements being offset in a given vertical direction from the optical axis of a respectively preceding optical element in the beam path.
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Accused Products
Abstract
A display element and a display device in which the display element is mounted. The display may be a variable message sign. The sign includes a tube-like housing in which lenses and apertures can be disposed. The light exiting a light source is emitted via an emitting surface, by way of which an illuminated traffic sign results from interacting with further display elements. The light source and the optical elements are disposed at different heights in the horizontally oriented housing. The optical axes can thereby extend horizontally, or the optical elements can lie on a main axis which is tilted downward in an radiation direction. In both cases, sunlight impinging from above at an angle advantageously falls on the LED to a slight degree, by way of which the phantom light phenomenon is minimized.
18 Citations
12 Claims
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1. An optical display element for luminous variable message signs or display boards, comprising:
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a substantially tubular housing disposed in an at least substantially horizontal orientation and having an input-side end, an output-side end, and a housing mid-axis extending in the substantially horizontal direction; a receptacle for a light source disposed at said input-side end, said receptacle having an optical axis; an exit region at said output-side end for light emitted by the light source; and a plurality of optical elements each having an optical axis extending substantially horizontally, said optical elements including a lens or a cover and being disposed in a beam path of the light source between said receptacle and said exit region; said receptacle and said optical elements being arranged relative to one another to define, from said receptacle to said exit region, a stepped height offset with respect to said housing mid-axis between said optical axes of each said optical elements and said optical axis of said receptacle, with each of said optical axes of said optical elements being offset in a given vertical direction from the optical axis of a respectively preceding optical element in the beam path. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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Specification