LED backlight

An LED backlight 100, suitable for use with a display panel, comprises: a monolithic LED array 110 having a surface and comprising a plurality of LEDs 115 for emitting light from the surface of the array; a monolithic collimator array 120 comprising a plurality of collimating channels 125, and being...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	Ahmad Makkaoui, Keith Strickland, Samir Mezouari
Format:	Patent
Sprache:	eng
Schlagworte:	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 NON-LINEAR OPTICS OPTICAL ANALOGUE/DIGITAL CONVERTERS OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS OPTICAL LOGIC ELEMENTS OPTICS PHYSICS TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF
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Beschreibung
Zusammenfassung:	An LED backlight 100, suitable for use with a display panel, comprises: a monolithic LED array 110 having a surface and comprising a plurality of LEDs 115 for emitting light from the surface of the array; a monolithic collimator array 120 comprising a plurality of collimating channels 125, and being aligned so that each of the collimating channels is aligned with one or more of the plurality of LEDs, wherein the collimating channels are configured to collimate emitted light emitted from the LEDs to angles in the range of about +/-50° from a line substantially normal to the surface of the LED array; a microlens array 130 for focusing the collimated light to infinity, the microlens array 130 comprising a plurality of lenslets 135, each lenslet aligned with a collimating channel 125 of the monolithic collimator array 120; and a relay lens 140 for focusing the light from the microlens array on a display panel. A method of using a monolithic collimator array in an LED backlight is also claimed, as is an illumination device for the backlight, omitting the relay lens.