OPTICAL DISPLAY ELEMENT AND DISPLAY DEVICE
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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.
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Citations
28 Claims
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1-12. -12. (canceled)
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13. 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 and an output-side end; a receptacle for a light source disposed at said input-side end; an exit region at said output-side end for light emitted by said light source; and at least one optical element disposed in a beam path between said receptacle and said exit region; said receptacle and said optical element or said optical elements being arranged relative to one another to define a height offset between each of said optical elements and said receptacle. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
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Specification