APPARATUS FOR LCD BACKLIGHTING
Systems and methods for providing an LCD with a collimated backlight and a n on- Lambertian diffuser are described. An LCD system includes: an illumination source (60) for producing light; a collimating waveguide (80) optically connected to the illumination source, the collimating waveguide includin...
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| creator | JANNSON, JOANNA L LATCHINIAN, JACK L KUPIEC, STEPHEN A JANNSON, TOMASZ P |
| description | Systems and methods for providing an LCD with a collimated backlight and a n on- Lambertian diffuser are described. An LCD system includes: an illumination source (60) for producing light; a collimating waveguide (80) optically connected to the illumination source, the collimating waveguide including a top surface (146), an incident end (130) a nd a plurality of substantially parallel optical elements (140) for redirecting light from the incident end to,and through, the top surface, each of the plurality of substantially parallel optical elements including a first facet (142) that is nonparallel to the top surface and a second facet (144) that is nonparallel to the top surface; a reflector (70) optically connected to the light source and optically connected to the collimating waveguide, the reflector (1) at least partially surrounding the illumination source and (2) reflecting light from said illumination sour ce to said incident end by direct reflection; a liquid crystal display (40) optically connected to the collimating waveguide; and a non-Lambertian diffuser (30) optically connected to the liquid crystal display for directing light from said liquid crystal display. The light from the reflector is directly incident upon the incident end. The systems and methods provide advantages in that the light from the LCD is bright and homogeneous. |
| format | Patent |
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An LCD system includes: an illumination source (60) for producing light; a collimating waveguide (80) optically connected to the illumination source, the collimating waveguide including a top surface (146), an incident end (130) a nd a plurality of substantially parallel optical elements (140) for redirecting light from the incident end to,and through, the top surface, each of the plurality of substantially parallel optical elements including a first facet (142) that is nonparallel to the top surface and a second facet (144) that is nonparallel to the top surface; a reflector (70) optically connected to the light source and optically connected to the collimating waveguide, the reflector (1) at least partially surrounding the illumination source and (2) reflecting light from said illumination sour ce to said incident end by direct reflection; a liquid crystal display (40) optically connected to the collimating waveguide; and a non-Lambertian diffuser (30) optically connected to the liquid crystal display for directing light from said liquid crystal display. The light from the reflector is directly incident upon the incident end. The systems and methods provide advantages in that the light from the LCD is bright and homogeneous.</description><language>eng ; fre</language><subject>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 ELEMENTS, SYSTEMS, OR APPARATUS ; OPTICAL LOGIC ELEMENTS ; OPTICS ; PHYSICS ; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHERARTICLES, NOT OTHERWISE PROVIDED FOR ; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF ; WEAPONS</subject><creationdate>2006</creationdate><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20060606&DB=EPODOC&CC=CA&NR=2245833C$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,776,881,25542,76290</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20060606&DB=EPODOC&CC=CA&NR=2245833C$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>JANNSON, JOANNA L</creatorcontrib><creatorcontrib>LATCHINIAN, JACK L</creatorcontrib><creatorcontrib>KUPIEC, STEPHEN A</creatorcontrib><creatorcontrib>JANNSON, TOMASZ P</creatorcontrib><title>APPARATUS FOR LCD BACKLIGHTING</title><description>Systems and methods for providing an LCD with a collimated backlight and a n on- Lambertian diffuser are described. An LCD system includes: an illumination source (60) for producing light; a collimating waveguide (80) optically connected to the illumination source, the collimating waveguide including a top surface (146), an incident end (130) a nd a plurality of substantially parallel optical elements (140) for redirecting light from the incident end to,and through, the top surface, each of the plurality of substantially parallel optical elements including a first facet (142) that is nonparallel to the top surface and a second facet (144) that is nonparallel to the top surface; a reflector (70) optically connected to the light source and optically connected to the collimating waveguide, the reflector (1) at least partially surrounding the illumination source and (2) reflecting light from said illumination sour ce to said incident end by direct reflection; a liquid crystal display (40) optically connected to the collimating waveguide; and a non-Lambertian diffuser (30) optically connected to the liquid crystal display for directing light from said liquid crystal display. The light from the reflector is directly incident upon the incident end. 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An LCD system includes: an illumination source (60) for producing light; a collimating waveguide (80) optically connected to the illumination source, the collimating waveguide including a top surface (146), an incident end (130) a nd a plurality of substantially parallel optical elements (140) for redirecting light from the incident end to,and through, the top surface, each of the plurality of substantially parallel optical elements including a first facet (142) that is nonparallel to the top surface and a second facet (144) that is nonparallel to the top surface; a reflector (70) optically connected to the light source and optically connected to the collimating waveguide, the reflector (1) at least partially surrounding the illumination source and (2) reflecting light from said illumination sour ce to said incident end by direct reflection; a liquid crystal display (40) optically connected to the collimating waveguide; and a non-Lambertian diffuser (30) optically connected to the liquid crystal display for directing light from said liquid crystal display. The light from the reflector is directly incident upon the incident end. The systems and methods provide advantages in that the light from the LCD is bright and homogeneous.</abstract><oa>free_for_read</oa></addata></record> |
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| subjects | 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 ELEMENTS, SYSTEMS, OR APPARATUS OPTICAL LOGIC ELEMENTS OPTICS PHYSICS STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHERARTICLES, NOT OTHERWISE PROVIDED FOR TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF WEAPONS |
| title | APPARATUS FOR LCD BACKLIGHTING |
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