VIEWING ANGLE SWITCHABLE BACK LIGHT UNIT

The present disclosure relates to a viewing angle switchable back light unit in which the general mode and the privacy mode in a liquid crystal dissplay can be selected. The present disclosure suggests a thin film type back light unit comprising: a light guide film (LGF) including a light entering p...

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Bibliographische Detailangaben
Hauptverfasser:	BANG, Hyungseok, BRUDER, Friedrich-Karl, HYUN, Joobong, RYU, Seungman
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	BLASTING DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH ISMODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THEDEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY,COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g.SWITCHING, GATING, MODULATING OR DEMODULATING FREQUENCY-CHANGING FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMSTHEREOF HEATING LIGHTING MECHANICAL ENGINEERING NON-LINEAR OPTICS OPTICAL ANALOGUE/DIGITAL CONVERTERS OPTICAL LOGIC ELEMENTS OPTICS PHYSICS STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHERARTICLES, NOT OTHERWISE PROVIDED FOR TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF WEAPONS
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Beschreibung
Zusammenfassung:	The present disclosure relates to a viewing angle switchable back light unit in which the general mode and the privacy mode in a liquid crystal dissplay can be selected. The present disclosure suggests a thin film type back light unit comprising: a light guide film (LGF) including a light entering part (LIN) disposed at one side, a light changing part (LRE) disposed at another side and a light guiding part (LWG) connecting the light entering part (LIN) and the light changing part (LRE); a light radiating part (LOT) disposed on an upper surface of the light guide film (LGF); and a light source (LS) disposed at the light entering part (LIN) of the light guide film (LGF). The light entering part (LIN) includes a wedge light coupler (WLC) and a light deflection element (SHOE). The light changing part (LRE) includes a light reflecting pattern (RHOE). The light radiating part (LOT) includes a light radiating film (VHOE) providing some of the collimated lights as back lights.