BRIGHTNESS ENHANCEMENT ARTICLE

A brightness enhancement article for conditioning luminance from a light source (18) in a viewing direction is provided. A prism surface side (44) collects light from the light providing surface (14), where, in one embodiment, the prism surface side (44) has a series of substantially parallel groove...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: KESSLER DAVID, MI XIANG DONG, DONNER JANET TERESA
Format: Patent
Sprache:eng
Schlagworte:
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Beschreibung
Zusammenfassung:A brightness enhancement article for conditioning luminance from a light source (18) in a viewing direction is provided. A prism surface side (44) collects light from the light providing surface (14), where, in one embodiment, the prism surface side (44) has a series of substantially parallel grooves (30) forming a series of longitudinal trapezoidal prism elements (38). Each trapezoidal prism element (38) has a face plane (46) disposed toward the light source (18) and first and second legs (34,36) extending back from said face plane (46), respectively, forming first and second base angles beta with the face plane (46), where both first and second base angles beta satisfy: 90 degrees < base angle beta < 120 degrees.