WO2009078055A1 - Light diffusing lens sheet, direct backlight using the sheet, and liquid crystal display television having the backlight installed therein - Google Patents

Light diffusing lens sheet, direct backlight using the sheet, and liquid crystal display television having the backlight installed therein Download PDF

Info

Publication number
WO2009078055A1
WO2009078055A1 PCT/JP2007/001399 JP2007001399W WO2009078055A1 WO 2009078055 A1 WO2009078055 A1 WO 2009078055A1 JP 2007001399 W JP2007001399 W JP 2007001399W WO 2009078055 A1 WO2009078055 A1 WO 2009078055A1
Authority
WO
WIPO (PCT)
Prior art keywords
lens sheet
backlight
sheet
light diffusing
diffusing lens
Prior art date
Application number
PCT/JP2007/001399
Other languages
French (fr)
Japanese (ja)
Inventor
Noriaki Okunaka
Yukinobu Yamazaki
Shunichi Umemoto
Original Assignee
Goyo Paper Working Co., Ltd.
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 Goyo Paper Working Co., Ltd. filed Critical Goyo Paper Working Co., Ltd.
Priority to PCT/JP2007/001399 priority Critical patent/WO2009078055A1/en
Priority to JP2007557257A priority patent/JP4277049B1/en
Publication of WO2009078055A1 publication Critical patent/WO2009078055A1/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
    • G02B5/0268—Diffusing elements; Afocal elements characterized by the fabrication or manufacturing method
    • 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
    • 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
    • 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
    • G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
    • 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
    • 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

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Nonlinear Science (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Optical Elements Other Than Lenses (AREA)
  • Liquid Crystal (AREA)

Abstract

A light diffusing lens sheet having a lens surface and a groove/ridge structure surface. In the lens sheet, a large number of substantially triangular column shaped prism sections made of a transparent high polymer material are arranged on the lens surface at specified intervals such that the major axes of the triangular columns are generally parallel to each other and, further, a groove/ridge structure having a height difference A of 2 - 30 μm, an interval B of 50 - 1000 μm, and B/A of 10 - 50 is formed on the groove/ridge surface at a twisting angle of 5 - 30° relative to the major axes of the prism sections. The light diffusing lens sheet has high light use efficiency, allows a user to easily view a display screen from the front, makes a place where a light source is placed less visible from the user, suppresses occurrence of interference fringes, and can emit uniform light from the entire emitting surface. Also, because the number of parts of the backlight can be reduced, the lens sheet can be manufactured at low cost and with high productivity.
PCT/JP2007/001399 2007-12-14 2007-12-14 Light diffusing lens sheet, direct backlight using the sheet, and liquid crystal display television having the backlight installed therein WO2009078055A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/JP2007/001399 WO2009078055A1 (en) 2007-12-14 2007-12-14 Light diffusing lens sheet, direct backlight using the sheet, and liquid crystal display television having the backlight installed therein
JP2007557257A JP4277049B1 (en) 2007-12-14 2007-12-14 Direct type backlight and liquid crystal television incorporating the backlight

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2007/001399 WO2009078055A1 (en) 2007-12-14 2007-12-14 Light diffusing lens sheet, direct backlight using the sheet, and liquid crystal display television having the backlight installed therein

Publications (1)

Publication Number Publication Date
WO2009078055A1 true WO2009078055A1 (en) 2009-06-25

Family

ID=40795183

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2007/001399 WO2009078055A1 (en) 2007-12-14 2007-12-14 Light diffusing lens sheet, direct backlight using the sheet, and liquid crystal display television having the backlight installed therein

Country Status (2)

Country Link
JP (1) JP4277049B1 (en)
WO (1) WO2009078055A1 (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07198913A (en) * 1993-12-28 1995-08-01 Enplas Corp Prism sheet
JPH10213777A (en) * 1997-01-30 1998-08-11 Matsushita Electric Ind Co Ltd Beam shaping device
JP2003257071A (en) * 2002-03-06 2003-09-12 Funai Electric Co Ltd Optical element for optical head and optical head
JP2007103325A (en) * 2005-10-07 2007-04-19 Kuraray Co Ltd Lighting device, light control member provided for it and image display apparatus using it

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0682634A (en) * 1992-07-07 1994-03-25 Sekisui Chem Co Ltd Surface light source device
JP3585509B2 (en) * 1993-03-15 2004-11-04 大日本印刷株式会社 Transmissive liquid crystal display
JPH08203312A (en) * 1995-01-24 1996-08-09 Toshiba Chem Corp Lighting system
JPH10300908A (en) * 1997-04-22 1998-11-13 Dainippon Printing Co Ltd Lens sheet, surface light source device, and transmission type display device
JP2000056106A (en) * 1998-08-05 2000-02-25 Mitsubishi Rayon Co Ltd Prism sheet and surface light source element
JP2000056107A (en) * 1998-08-05 2000-02-25 Mitsubishi Rayon Co Ltd Prism sheet and surface light source element

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07198913A (en) * 1993-12-28 1995-08-01 Enplas Corp Prism sheet
JPH10213777A (en) * 1997-01-30 1998-08-11 Matsushita Electric Ind Co Ltd Beam shaping device
JP2003257071A (en) * 2002-03-06 2003-09-12 Funai Electric Co Ltd Optical element for optical head and optical head
JP2007103325A (en) * 2005-10-07 2007-04-19 Kuraray Co Ltd Lighting device, light control member provided for it and image display apparatus using it

Also Published As

Publication number Publication date
JP4277049B1 (en) 2009-06-10
JPWO2009078055A1 (en) 2011-04-28

Similar Documents

Publication Publication Date Title
US9279560B2 (en) LED lens and LCD backlight screen
EP3264146B1 (en) Display device and television receiver with laminated optical member.
US9134463B2 (en) Optical film having improved optical performance, and backlight unit comprising the same
TW200622354A (en) Liquid crystal display and backlight module
TW200710506A (en) Surface light source and backlight unit having the same
CN102798908B (en) Diffuser plate, direct-type backlight module and display device
TW200702836A (en) Method of letting a sufficient quantity of light pass through each of apertures for entry of backlight
CN104423089A (en) Optical sheet and backlight unit and display device comprising the same
NL1034683A1 (en) Light diffusion plate, surface light source device and liquid crystal display device.
CN101359066A (en) Microstructure multifunction optical film diaphragm
WO2008149566A1 (en) Backlight unit and liquid crystal display
KR20140075355A (en) Liquid crystal display device
CN100406999C (en) Light guide plate and backlight module using same
CN103823263A (en) Composite prismatic lens
CN202229018U (en) Backlight and liquid crystal display with same
TW200500662A (en) Backlight module and liquid crystal display device using the same
TW200707005A (en) Direct-type backlight module and liquid crystal display using same
CN102444835A (en) Straight-down type backlight module and liquid crystal display module
CN202975375U (en) Brightness enhancement film and display device
WO2009078055A1 (en) Light diffusing lens sheet, direct backlight using the sheet, and liquid crystal display television having the backlight installed therein
CN103018952A (en) Display base plate and display device comprising display base plate
CN209297071U (en) A kind of liquid crystal display die set for the effect that can generate wide viewing angle
CN104267539A (en) LED (light-emitting diode) light mixing device
CN203164453U (en) Brightness enhancement film and display apparatus using the brightness enhancement film
KR20160118712A (en) Backlight unit and display device including the same

Legal Events

Date Code Title Description
ENP Entry into the national phase

Ref document number: 2007557257

Country of ref document: JP

Kind code of ref document: A

121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 07859651

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 07859651

Country of ref document: EP

Kind code of ref document: A1