Verbesserte Randgekoppelte Lichtkollimation für Hintergrundbeleuchtung

Details

Veröffentlichungs-Nr.

EP3839337

Aktenzeichen

EP20215092

Anmeldetag

17. Dezember 2020

Veröffentlichung

23. Oktober 2024

Erteilung

23. Oktober 2024

Rechtsraum

EP

IPC

F21V8/00G02B3/00

Abstract

The invention describes a backlight apparatus (400) comprising: a backplate (102); a light emitting element (30) located within the backplate (102) and configured to emit visible light; a lens (302) located within the backplate (102) and configured to angularly redirect the visible light into a batwing configuration of first and second collimated light beams (308, 310), the lens (302) including a concave receiving surface (304) facing the light emitting element and a transmission surface (305) opposing the receiving surface (305), the transmission surface (305) including an angle of curvature that increases closer to a plane of symmetry (306) of the lens; and a light guide panel (20) configured to distribute light from the first and second collimated light beams (306, 310) to a surface (52) of the light guide panel (20) facing a display device (40). The invention further describes a method of manufacturing such a backlight apparatus.

Anmelder

Firma

Lumileds Holding B.V.

Land

🇳🇱 Niederlande

Fachgebiete