A display sign and an optical element for use in the same

Details A display sign and an optical element for use in the same A display sign and an optical element for use in the same

G - Physics

09

F

G09F 19/12 (2006.01) G02B 5/12 (2006.01) G09F 9/00 (2006.01) G09F 9/33 (2006.01) H01L 25/13 (2006.01) H01L 33/00 (2006.01)

Patent

CA 2200266

An optical element (26) is fitted to a high intensity light emitting diode (10) used in a variable message sign. The optical element (26) has surfaces (30) which redirect any stray light from the light emitting diode (10) to form useful light. The faces (32, 34 & 36) of the optical element (26) are angled to shape the light beam emitted therefrom. The light beam is shaped by the faces (32, 34 & 36) to produce a beam having increased intensity in a predetermined direction. The optical element (26) enhances the visibility of the sign and allows a reduction in the number of light emitting diodes (10) used in the sign.

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