Source: http://www.google.com/patents/US6290364?dq=7,346,539
Timestamp: 2016-07-02 09:33:49
Document Index: 352964134

Matched Legal Cases: ['Application No. 1', 'Application No. 1', 'Application No. 1', 'Application No. 2', 'Application No. 2', 'Application No. 2', 'Application No. 4', 'Application No. 4']

Patent US6290364 - Surface light source device - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inPatentsA light incident into a wedge type light scattering conducting element from a light incident surface of the light scattering conducting element is converted into a light flux having a directionality and is output from a light output surface. The output light is input to a wedge type emitting direction...http://www.google.com/patents/US6290364?utm_source=gb-gplus-sharePatent US6290364 - Surface light source deviceAdvanced Patent SearchPublication numberUS6290364 B1Publication typeGrantApplication numberUS 09/132,138Publication dateSep 18, 2001Filing dateAug 10, 1998Priority dateApr 5, 1993Fee statusPaidAlso published asUS5899552, US6152570Publication number09132138, 132138, US 6290364 B1, US 6290364B1, US-B1-6290364, US6290364 B1, US6290364B1InventorsYasuhiro Koike, Takayuki AraiOriginal AssigneeEnplas Corporation, Yasuhiro KoikeExport CitationBiBTeX, EndNote, RefManPatent Citations (15), Non-Patent Citations (11), Referenced by (63), Classifications (26), Legal Events (4) External Links: USPTO, USPTO Assignment, EspacenetSurface light source device
f(b)=[(b+2)2 /b 2(b+1)−{2(b+2)/b 3}�1n(b+1)] (11)
FIG. 2 is a graphical representation exemplifying a case of two values of “a”. In the drawing, x-axis expresses scattering angle Φ (a traveling direction of incident light is made Φ=0�), y-axis a normalized scattering light intensity in the case of assuming natural light, expressing a value Vvh(Φ)/Vvh(0) normalized from the equation (5) for Φ=0�.
Polymethylmethacrylate (PMMA) is added by 0.4 wt % of polystyrene (PSt), and mixed for ten minutes using a V type tumbler and then mixed for five minutes using a HENSCHER mixer. The resultant is fused and mixed under the condition of a cylinder temperature 220� C to 250� C, a screw rotating speed 75 rpm, a discharging amount 6 kg/hr using a two shaft protrusion machine with a diameter 30 mm made by NAKATANI MACHINE Co., Ltd.
Considering a boundary face transmittance relating to each reflection, a total reflection arises under condition of θ1>ac (ac represents a critical angle, approximating 42� at PMMA—air boundary face), and with θi lower than ac, the transmittance steeply arises. With θi lower than a predetermined value (around 35� at PMMA—air boundary face), the transmittance becomes substantially constant. FIG. 16 shows a status where emitting lights B4 and B6 are produced by a relationship of θ2>ac>θ4>θ6.
Polymethylmethacrylate (PMMA) is added by 0.5 wt % of polystyrene (PSt), and mixed for 10 minutes by a V type tumbler and for 5 minutes by a HENSCHER mixer. The mixture obtained is fused and mixed by a two shaft type protrusion machine “NAKATANI MACHINE Co., Ltd.;” with a diameter 30 mm under the condition of a cylinder temperature 220� C. to 250� C., a screw rotational speed 75 rpm, a discharge amount 6 kg/hr, thereby a pellet is produced.
MMA (methylmethacrylate) is added of respective 0.05 wt %, 0.08 wt %, 0.10 wt %, and 0.15 wt % of silicone series resin powders with a particle size 29 μm (TOSHIBA SILICONE Co., Ltd.; TOSPEARL 120), and uniformly dispersed four kinds of test materials and particle MMS test material are prepared, to each of which is added 0.5 wt % of benzoylperoxide (BPO) as a radical polymerization starting agent and 0.2 wt % of n-laurylmercaptan (n-LMO as a chain transfer agent, and casting-polymerized for 24 hours at 70� C., and a wedge type light scattering conducting element with a height 68 mm, a width 85 mm, and thickness having gradual variation in a longitudinal direction from 3.8 mm to 0.2 mm is manufactured at every sheet basis.
Patent CitationsCited PatentFiling datePublication dateApplicantTitleUS5295048May 28, 1992Mar 15, 1994Samsung Electron Devices Co., Ltd.Backlight generating apparatus of a liquid crystal display deviceUS5542017Sep 25, 1992Jul 30, 1996Koike; YasuhiroLight scattering light guide and applied optical apparatusesUS5548670Nov 29, 1993Aug 20, 1996Koike; YasuhiroLight-scattering light-guiding deviceUS5580932Mar 18, 1994Dec 3, 1996Koike; YasuhiroManufacturing method of a light scattering light guideJPH0213925A Title not availableJPH01172801A Title not availableJPH01236257A Title not availableJPH01269901A Title not availableJPH02221925A Title not availableJPH02245787A Title not availableJPH04140783A Title not availableJPH04145485A Title not availableJPS5189888A Title not availableJPS6363083A Title not availableJPS62235905A Title not availableNon-Patent CitationsReference1"High Brightness Light Scattering Transmission Body and Its Structure", Megumi Izuhara et al., Polymer Reprints, Japan, vol. 41, No. 7, (1992), pp. 2945-2946.2"High Brightness Light Scattering Transmission Body", Yasuhiro Koike et al., Polymer Reprints, Japan, vol. 41, No. 7, (1992), p. 2944.3Japanese language Abstract of Japanese Patent Publication 51-89888, Jul. 19, 1976.4Patent Abstract of Japanese Application No. 1-172801, Jul. 7, 1989.5Patent Abstract of Japanese Application No. 1-236257, Sep. 21, 1989.6Patent Abstract of Japanese Application No. 1-269901, Oct. 27, 1989.7Patent Abstract of Japanese Application No. 2-13925, Jan. 18, 1990.8Patent Abstract of Japanese Application No. 2-221925, Sep. 4, 1990.9Patent Abstract of Japanese Application No. 2-245787, Oct. 1, 1990.10Patent Abstract of Japanese Application No. 4-140783, May 14, 1992.11Patent Abstract of Japanese Application No. 4-145485, May 19, 1992.Referenced byCiting PatentFiling datePublication dateApplicantTitleUS6464367 *Feb 23, 2001Oct 15, 2002Sony CorporationSurface light source systemUS6595652 *Dec 12, 2001Jul 22, 2003International Manufacturing And Engineering Services Co., Ltd.Surface lighting deviceUS6837588 *Dec 18, 2002Jan 4, 2005Minebea Co., Ltd.Spread illuminating apparatus with means for reflecting light disperselyUS7128459 *Nov 8, 2002Oct 31, 2006Nidec Copal CorporationLight-guide plate and method for manufacturing the sameUS7207699 *Mar 8, 2001Apr 24, 2007Siteco Beleuchtungstechnik GmbhSystem of light unitsUS7223005Dec 23, 2003May 29, 2007Lamb David JHybrid lightguide backlightUS7278766 *Dec 18, 2003Oct 9, 2007Honeywell International Inc.LED based light guide for dual mode aircraft formation lightingUS7290902 *Apr 14, 2005Nov 6, 2007Nitto Denko CorporationDirect-type backlightUS7303322 *Dec 23, 2003Dec 4, 20073M Innovative Properties CompanyMultiple lightguide backlightUS7312868 *Jun 25, 2003Dec 25, 2007FormulactionMethod and device for measuring a light flux backscattered by a dispersed medium, unperturbed by interface reflectionsUS7324284 *Jul 27, 2006Jan 29, 2008General Electric CompanyOptical substrate and method of makingUS7431491 *Aug 15, 2006Oct 7, 2008Hon Hai Precision Industry Co., Ltd.Light guide plate and backlight module using the sameUS7542108Nov 10, 2005Jun 2, 2009Hitachi, Ltd.Liquid crystal display deviceUS7553057 *Jun 30, 2009Lg Display Co., Ltd.Display device and backlight unit for the sameUS7859759Jun 18, 2008Dec 28, 2010Sabic Innovative Plastics Ip B.V.Film, backlight displays, and methods for making the sameUS7942541 *Dec 8, 2006May 17, 2011Lg Display Co., Ltd.Light guide, image display device and method for generating imageUS7965447Oct 30, 2007Jun 21, 2011Sabic Innovative Plastics Ip B.V.Optical substrate and method of makingUS8297802 *Oct 9, 2009Oct 30, 2012Wintek CorporationOptical film having linear protrusions with inwardly curved ridges and back light module with the optical filmUS8382359Jul 2, 2009Feb 26, 2013Sharp Kabushiki KaishaLighting device, display device and television receiverUS8833959Feb 2, 2012Sep 16, 2014Blackberry LimitedDisplay arrangement with optical structure for reducing halo effectUS8876354 *May 6, 2010Nov 4, 2014Udayan KanadeLight source comprising light deflecting particlesUS9166127 *Feb 25, 2010Oct 20, 2015Koha Co., Ltd.Light source moduleUS9182531Mar 21, 2011Nov 10, 2015Osram AgSurface light guide and luminaireUS9304232 *Sep 11, 2012Apr 5, 2016Sabic Global Technologies B.V.Sheet for LED light cover applicationUS9366796 *Apr 17, 2009Jun 14, 20163M Innovative Properties CompanySide lighting optical fiberUS20030090887 *Nov 8, 2002May 15, 2003Nidec Copal CorporationLight-guide plate and method for manufacturing the sameUS20030117792 *Dec 18, 2002Jun 26, 2003Minebea Co. 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