Led array systems

A light emitting diode (LED) array comprises an array of LEDs mounted to a substrate. The LEDs emit light in a direction generally perpendicular to the substrate (308). An optical sheet is disposed over the LEDs (320). At least a portion of light entering one side of the optical sheet from the LEDs...

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Bibliographic Details
Main Author EPSTEIN KENNETH A.,TRAN HUNG T.,SCHULTZ JOHN C.,EMMONS ROBERT M
Format Patent
LanguageEnglish
Published 04.07.2007
Subjects
ADVERTISING
BASIC ELECTRIC ELEMENTS
BLASTING
CRYPTOGRAPHY
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
DISPLAY
DISPLAYING
EDUCATION
ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR
ELECTRICITY
FREQUENCY-CHANGING
FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMSTHEREOF
HEATING
LABELS OR NAME-PLATES
LIGHTING
MECHANICAL ENGINEERING
NON-LINEAR OPTICS
OPTICAL ANALOGUE/DIGITAL CONVERTERS
OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
OPTICAL LOGIC ELEMENTS
OPTICS
PHYSICS
SEALS
SEMICONDUCTOR DEVICES
SIGNS
STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHERARTICLES, NOT OTHERWISE PROVIDED FOR
TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF
WEAPONS
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Summary:A light emitting diode (LED) array comprises an array of LEDs mounted to a substrate. The LEDs emit light in a direction generally perpendicular to the substrate (308). An optical sheet is disposed over the LEDs (320). At least a portion of light entering one side of the optical sheet from the LEDs is guided within the optical sheet in a direction generally parallel to the substrate. Light extraction features (324) direct light from the optical sheet in a generally forward direction. Such an array is useful for several applications, including space lighting, direct information display and backlighting of liquid crystal displays. The light spreading effect of the optical sheet reduces the amount of black space between LED pixels.
Bibliography:Application Number: CN200580024920