TW200951559A - Light-diffusing sheet and optical sheet for a back light unit - Google Patents

Light-diffusing sheet and optical sheet for a back light unit

Info

Publication number
TW200951559A
TW200951559A TW097137483A TW97137483A TW200951559A TW 200951559 A TW200951559 A TW 200951559A TW 097137483 A TW097137483 A TW 097137483A TW 97137483 A TW97137483 A TW 97137483A TW 200951559 A TW200951559 A TW 200951559A
Authority
TW
Taiwan
Prior art keywords
light
diffusing
sheet
binder resin
optical sheet
Prior art date
Application number
TW097137483A
Other languages
Chinese (zh)
Other versions
TWI398699B (en
Inventor
Kwang-Soo Kim
Moon-Bok Lee
Jeong-Tae Seo
In-Sik Jeong
Original Assignee
Toray Saehan Inc
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
Application filed by Toray Saehan Inc filed Critical Toray Saehan Inc
Publication of TW200951559A publication Critical patent/TW200951559A/en
Application granted granted Critical
Publication of TWI398699B publication Critical patent/TWI398699B/en

Links

Classifications

    • 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
    • G02B5/0226—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 having particles on the surface
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
    • B32B27/365—Layered products comprising a layer of synthetic resin comprising polyesters comprising polycarbonates
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/02—Diffusing elements; Afocal elements
    • G02B5/0268—Diffusing elements; Afocal elements characterized by the fabrication or manufacturing method
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133611—Direct backlight including means for improving the brightness uniformity
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2305/00—Condition, form or state of the layers or laminate
    • B32B2305/30—Fillers, e.g. particles, powders, beads, flakes, spheres, chips

Abstract

The invention relates to a light-diffusing sheet and optical sheet for a backlight unit, and, more particularly, to a light-diffusing sheet and optical sheet for a backlight unit whose luminance and masking capability are improved by maximizing a refraction and diffraction property of light. To this end, the invention is characterized in that the light-diffusing sheet for a backlight unit according to the invention comprises a substrate film, a light-diffusing layer applied on at least one side of the substrate film as an application liquid comprising a binder resin and particles, and a thin film layer applied on the light-diffusing layer by mixing at least one binder resin with a refractive index different from an index of the binder resin of the light-diffusing layer. Preferably, the invention is characterized in that a refractive index of the binder resin forming the thin film layer is between 1.30 and 1.80, and is greater than an index of the binder resin of the light-diffusing layer.
TW097137483A 2008-06-13 2008-09-30 Light-diffusing sheet and optical sheet for a back light unit TWI398699B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020080055688A KR100963106B1 (en) 2008-06-13 2008-06-13 Light-diffusing sheet and optical sheet for back light unit

Publications (2)

Publication Number Publication Date
TW200951559A true TW200951559A (en) 2009-12-16
TWI398699B TWI398699B (en) 2013-06-11

Family

ID=41547917

Family Applications (1)

Application Number Title Priority Date Filing Date
TW097137483A TWI398699B (en) 2008-06-13 2008-09-30 Light-diffusing sheet and optical sheet for a back light unit

Country Status (3)

Country Link
JP (1) JP5045626B2 (en)
KR (1) KR100963106B1 (en)
TW (1) TWI398699B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101362112B1 (en) * 2011-04-12 2014-02-12 케이와 인코포레이티드 Optical sheet, optical unit, backlight unit and liquid crystal display device
CN115016168A (en) * 2021-12-31 2022-09-06 东莞市托普莱斯光电技术有限公司 High-brightness silver-plated reflective film for backlight module

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3352832B2 (en) * 1993-10-27 2002-12-03 富士写真フイルム株式会社 Light diffusion plate
US6010747A (en) * 1996-12-02 2000-01-04 Alliedsignal Inc. Process for making optical structures for diffusing light
TW409196B (en) * 1998-12-18 2000-10-21 Mitsubishi Rayon Co Transmission-type screen
JP2002048903A (en) * 2000-05-26 2002-02-15 Comoc:Kk Microlens array and display device using microlens array
JP3822102B2 (en) * 2001-12-27 2006-09-13 富士写真フイルム株式会社 Light diffusing film, manufacturing method thereof, polarizing plate and liquid crystal display device
US6636363B2 (en) * 2002-03-11 2003-10-21 Eastman Kodak Company Bulk complex polymer lens light diffuser
JP4227436B2 (en) * 2003-02-21 2009-02-18 恵和株式会社 Light diffusion sheet and backlight unit using the same
KR100909427B1 (en) * 2005-07-27 2009-07-28 주식회사 코오롱 Light control film
JP2007293303A (en) 2006-03-28 2007-11-08 Fujifilm Corp Light-scattering film, polarizing plate and image display
JP2008032833A (en) 2006-07-26 2008-02-14 Dainippon Printing Co Ltd Optical sheet, transmission-type screen and back projection type display apparatus
JP2008122832A (en) 2006-11-15 2008-05-29 Toppan Printing Co Ltd Antiglare light diffusing member

Also Published As

Publication number Publication date
JP5045626B2 (en) 2012-10-10
TWI398699B (en) 2013-06-11
KR100963106B1 (en) 2010-06-14
KR20090129655A (en) 2009-12-17
JP2009300996A (en) 2009-12-24

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Legal Events

Date Code Title Description
MM4A Annulment or lapse of patent due to non-payment of fees