WO2001027663A1 - Optical film with variable angle prisms - Google Patents
Optical film with variable angle prisms Download PDFInfo
- Publication number
- WO2001027663A1 WO2001027663A1 PCT/US2000/024355 US0024355W WO0127663A1 WO 2001027663 A1 WO2001027663 A1 WO 2001027663A1 US 0024355 W US0024355 W US 0024355W WO 0127663 A1 WO0127663 A1 WO 0127663A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- prisms
- prism
- recited
- turning film
- configuration
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/04—Prisms
-
- 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
-
- 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
- G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
- G02B6/0023—Means for improving the coupling-in of light from the light source into the light guide provided by one optical element, or plurality thereof, placed between the light guide and the light source, or around the light source
- G02B6/0031—Reflecting element, sheet or layer
-
- 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
- G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
- G02B6/0045—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it by shaping at least a portion of the light guide
- G02B6/0046—Tapered light guide, e.g. wedge-shaped light guide
-
- 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
-
- 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
- G02B6/0066—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 characterised by the light source being coupled to the light guide
- G02B6/0068—Arrangements of plural sources, e.g. multi-colour light sources
-
- 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
- G02B6/0066—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 characterised by the light source being coupled to the light guide
- G02B6/007—Incandescent lamp or gas discharge lamp
- G02B6/0071—Incandescent lamp or gas discharge lamp with elongated shape, e.g. tube
Definitions
- the invention relates generally to light trans issive optical films, and more particularly, the invention relates to an optical film with an array of variable angle prisms.
- the prism configurations are also influenced by the refractive index of the optically transmissive film due to the effects on the refraction face and the TIR at the reflection face.
- Typical film material may have an index in the range of 1.35-1.75.
- a prism configuration with a nominal included angle of 68.9° may be used.
- a lightguide 52 forms a portion of the illuminating device 50 and includes a first entrance surface 54, a second entrance surface 56, an output surface 58 and a back surface 60.
- a first light source 62 includes a first light source reflector 64 and couples to the first entrance surface 54.
- a second light source 66 includes a second light source reflector 68 and couples to the second entrance surface.
- Disposed adjacent the output surface 58 is a first light redirecting element 70.
- the first light redirecting element 70 includes an input surface 72 and an output surface 74.
- the illumination device 50 further includes a reflector 76 adjacent the back surface 60, a second light redirecting element 78 and a reflective polarizer 80.
- the array of prisms formed on the input surface 72 of the light redirecting structure 70 may be altered at a corresponding center portion 84 to reduce this perceived optical defect in a manner similar to that by which the array reduces perceived ripple.
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2001530619A JP2003511735A (en) | 1999-10-08 | 2000-09-01 | Optical film with prisms of various angles |
EP00961552A EP1218776A1 (en) | 1999-10-08 | 2000-09-01 | Optical film with variable angle prisms |
AU73493/00A AU7349300A (en) | 1999-10-08 | 2000-09-01 | Optical film with variable angle prisms |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/415,873 | 1999-10-08 | ||
US09/415,873 US6356391B1 (en) | 1999-10-08 | 1999-10-08 | Optical film with variable angle prisms |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2001027663A1 true WO2001027663A1 (en) | 2001-04-19 |
Family
ID=23647565
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US2000/024355 WO2001027663A1 (en) | 1999-10-08 | 2000-09-01 | Optical film with variable angle prisms |
Country Status (7)
Country | Link |
---|---|
US (3) | US6356391B1 (en) |
EP (1) | EP1218776A1 (en) |
JP (1) | JP2003511735A (en) |
KR (1) | KR100867160B1 (en) |
CN (1) | CN1171100C (en) |
AU (1) | AU7349300A (en) |
WO (1) | WO2001027663A1 (en) |
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Also Published As
Publication number | Publication date |
---|---|
KR20020041819A (en) | 2002-06-03 |
KR100867160B1 (en) | 2008-11-06 |
EP1218776A1 (en) | 2002-07-03 |
US20030112521A1 (en) | 2003-06-19 |
US6707611B2 (en) | 2004-03-16 |
AU7349300A (en) | 2001-04-23 |
US6560026B2 (en) | 2003-05-06 |
US6356391B1 (en) | 2002-03-12 |
CN1378653A (en) | 2002-11-06 |
JP2003511735A (en) | 2003-03-25 |
US20020057497A1 (en) | 2002-05-16 |
CN1171100C (en) | 2004-10-13 |
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