WO1995031672A1 - Illumination system employing an array of microprisms - Google Patents
Illumination system employing an array of microprisms Download PDFInfo
- Publication number
- WO1995031672A1 WO1995031672A1 PCT/US1995/004285 US9504285W WO9531672A1 WO 1995031672 A1 WO1995031672 A1 WO 1995031672A1 US 9504285 W US9504285 W US 9504285W WO 9531672 A1 WO9531672 A1 WO 9531672A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- light
- microprisms
- transmitting means
- array
- sidewalls
- Prior art date
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
-
- 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
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
- F21Y2103/00—Elongate light sources, e.g. fluorescent tubes
Definitions
- Repeat distances 38 and 40 may be equal or unequal and may vary widely depending on the resolution and dimensions of the display. In addition, the repeat distances 38 and 40 may vary across the surface of the waveguide 16 in order to compensate for a lowering of the light intensity inside waveguide 16 as the distance from light generating means 14 increases. This lowering of the light intensity is due to light removal by the other microprisms of the array.
- sidewalls 35 and 37 also form a tilt angle ⁇ to the normal of the surface of waveguide 16.
- the desired values of tilt angle ⁇ range from about 0 degrees to about 25 degrees. More preferred values for tilt angle ⁇ range from about 2 degrees to about 15 degrees.
- the tilt angles ⁇ associated with sidewalls 35 and 37 are equal, but equal angles are not necessary.
- the height of microprism 28 has dimension 50 as shown in Fig. 1A. Height 50 may vary widely depending on the dimensions and resolution of the display. That is, smaller displays, such as laptop computer displays and avionics displays 5. would have greatly reduced dimensions versus larger displays such as large screen, flat-panel televisions.
- each microlens 80 aligns with respect to the microprism array so that equal distances overlap adjacent microprisms as shown in Figs. 5 and 6.
- the width 87 of each microlens aligns with respect to a single microlens as shown in Fig. 7.
Abstract
Description
Claims
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE69507456T DE69507456T2 (en) | 1994-05-13 | 1995-04-07 | LIGHTING GRID USING LIGHTING SYSTEM |
CA002190122A CA2190122C (en) | 1994-05-13 | 1995-04-07 | Illumination system employing an array of microprisms |
AU22802/95A AU2280295A (en) | 1994-05-13 | 1995-04-07 | Illumination system employing an array of microprisms |
MX9605117A MX9605117A (en) | 1994-05-13 | 1995-04-07 | Illumination system employing an array of microprisms. |
EP95916225A EP0749550B1 (en) | 1994-05-13 | 1995-04-07 | Illumination system employing an array of microprisms |
JP52963995A JP3488467B2 (en) | 1994-05-13 | 1995-04-07 | Illumination system using an array of microprisms |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/242,525 US5428468A (en) | 1993-11-05 | 1994-05-13 | Illumination system employing an array of microprisms |
US08/242,525 | 1994-05-13 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1995031672A1 true WO1995031672A1 (en) | 1995-11-23 |
Family
ID=22915121
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US1995/004285 WO1995031672A1 (en) | 1994-05-13 | 1995-04-07 | Illumination system employing an array of microprisms |
Country Status (13)
Country | Link |
---|---|
US (3) | US5428468A (en) |
EP (1) | EP0749550B1 (en) |
JP (1) | JP3488467B2 (en) |
KR (1) | KR100373312B1 (en) |
CN (1) | CN1095056C (en) |
AU (1) | AU2280295A (en) |
CA (1) | CA2190122C (en) |
DE (1) | DE69507456T2 (en) |
IN (1) | IN190745B (en) |
MX (1) | MX9605117A (en) |
MY (1) | MY113843A (en) |
TW (1) | TW301717B (en) |
WO (1) | WO1995031672A1 (en) |
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US7794100B2 (en) | 2006-12-27 | 2010-09-14 | Sony Corporation | Planar light source apparatus, display apparatus and planar illumination method |
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Also Published As
Publication number | Publication date |
---|---|
CA2190122C (en) | 2005-07-26 |
KR100373312B1 (en) | 2003-05-12 |
TW301717B (en) | 1997-04-01 |
EP0749550A1 (en) | 1996-12-27 |
US5739931A (en) | 1998-04-14 |
JPH10500528A (en) | 1998-01-13 |
CA2190122A1 (en) | 1995-11-23 |
US5555109A (en) | 1996-09-10 |
MY113843A (en) | 2002-06-29 |
DE69507456T2 (en) | 1999-07-15 |
CN1095056C (en) | 2002-11-27 |
DE69507456D1 (en) | 1999-03-04 |
CN1148428A (en) | 1997-04-23 |
AU2280295A (en) | 1995-12-05 |
EP0749550B1 (en) | 1999-01-20 |
IN190745B (en) | 2003-08-16 |
KR970702979A (en) | 1997-06-10 |
MX9605117A (en) | 1997-12-31 |
JP3488467B2 (en) | 2004-01-19 |
US5428468A (en) | 1995-06-27 |
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