CA2212223A1 - Light directing film having variable height structured surface and light directing article constructed therefrom - Google Patents

Light directing film having variable height structured surface and light directing article constructed therefrom

Info

Publication number
CA2212223A1
CA2212223A1 CA002212223A CA2212223A CA2212223A1 CA 2212223 A1 CA2212223 A1 CA 2212223A1 CA 002212223 A CA002212223 A CA 002212223A CA 2212223 A CA2212223 A CA 2212223A CA 2212223 A1 CA2212223 A1 CA 2212223A1
Authority
CA
Canada
Prior art keywords
light directing
structured surface
variable height
constructed therefrom
article constructed
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA002212223A
Other languages
French (fr)
Other versions
CA2212223C (en
Inventor
David L. Wortman
Mark E. Gardiner
Sanford Cobb Jr.
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
3M Co
Original Assignee
David L. Wortman
Mark E. Gardiner
Minnesota Mining And Manufacturing Company
Sanford Cobb Jr.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=23582043&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=CA2212223(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by David L. Wortman, Mark E. Gardiner, Minnesota Mining And Manufacturing Company, Sanford Cobb Jr. filed Critical David L. Wortman
Publication of CA2212223A1 publication Critical patent/CA2212223A1/en
Application granted granted Critical
Publication of CA2212223C publication Critical patent/CA2212223C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
    • G02B6/0053—Prismatic sheet or layer; Brightness enhancement element, sheet or layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D11/00—Producing optical elements, e.g. lenses or prisms
    • B29D11/0074—Production of other optical elements not provided for in B29D11/00009- B29D11/0073
    • B29D11/00788—Producing optical films
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V5/00—Refractors for light sources
    • F21V5/02—Refractors for light sources of prismatic shape
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/02—Diffusing elements; Afocal elements
    • G02B5/0205—Diffusing elements; Afocal elements characterised by the diffusing properties
    • G02B5/021—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place at the element's surface, e.g. by means of surface roughening or microprismatic structures
    • G02B5/0221—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place at the element's surface, e.g. by means of surface roughening or microprismatic structures the surface having an irregular structure
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/02—Diffusing elements; Afocal elements
    • G02B5/0205—Diffusing elements; Afocal elements characterised by the diffusing properties
    • G02B5/021—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place at the element's surface, e.g. by means of surface roughening or microprismatic structures
    • G02B5/0231—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place at the element's surface, e.g. by means of surface roughening or microprismatic structures the surface having microprismatic or micropyramidal shape
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/02—Diffusing elements; Afocal elements
    • G02B5/0273—Diffusing elements; Afocal elements characterized by the use
    • G02B5/0278—Diffusing elements; Afocal elements characterized by the use used in transmission
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/04—Prisms
    • G02B5/045—Prism arrays
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
    • G02B6/0055—Reflecting element, sheet or layer
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S385/00—Optical waveguides
    • Y10S385/901—Illuminating or display apparatus

Abstract

A light directing film (50) including a first surface and a second structured surface (52). The structured surface (52) includes a repeating pattern of prism zones including at least a first zone having a plurality of prism elements (56) with peaks disposed at a first distance from a reference plane and a second zone having a plurality of prism elements (54) with peaks disposed less than the first distance from a reference plane. The width of the first zone preferably measures less than about 300 microns.
CA002212223A 1995-03-03 1996-01-18 Light directing film having variable height structured surface and light directing article constructed therefrom Expired - Lifetime CA2212223C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US40005295A 1995-03-03 1995-03-03
US08/400052 1995-03-03
PCT/US1996/000796 WO1996027757A1 (en) 1995-03-03 1996-01-18 Light directing film having variable height structured surface and light directing article constructed therefrom

Publications (2)

Publication Number Publication Date
CA2212223A1 true CA2212223A1 (en) 1996-09-12
CA2212223C CA2212223C (en) 2007-03-20

Family

ID=23582043

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002212223A Expired - Lifetime CA2212223C (en) 1995-03-03 1996-01-18 Light directing film having variable height structured surface and light directing article constructed therefrom

Country Status (8)

Country Link
US (1) US5771328A (en)
EP (1) EP0813667B1 (en)
JP (1) JP4168179B2 (en)
KR (1) KR100398940B1 (en)
AU (1) AU694619B2 (en)
CA (1) CA2212223C (en)
DE (1) DE69602588T2 (en)
WO (1) WO1996027757A1 (en)

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CA2212223C (en) 2007-03-20
EP0813667A1 (en) 1997-12-29

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MKEX Expiry

Effective date: 20160118