WO2021210246A1 - プリズムシート及びこれを用いた照明装置 - Google Patents

プリズムシート及びこれを用いた照明装置 Download PDF

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Publication number
WO2021210246A1
WO2021210246A1 PCT/JP2021/003742 JP2021003742W WO2021210246A1 WO 2021210246 A1 WO2021210246 A1 WO 2021210246A1 JP 2021003742 W JP2021003742 W JP 2021003742W WO 2021210246 A1 WO2021210246 A1 WO 2021210246A1
Authority
WO
WIPO (PCT)
Prior art keywords
prism
prism sheet
array
prism array
guide plate
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.)
Ceased
Application number
PCT/JP2021/003742
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
長谷川　誠
延幸 鈴木
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.)
Japan Display Inc
Original Assignee
Japan Display 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 Japan Display Inc filed Critical Japan Display Inc
Priority to CN202180020187.XA priority Critical patent/CN115280062A/zh
Priority to JP2022515214A priority patent/JPWO2021210246A1/ja
Publication of WO2021210246A1 publication Critical patent/WO2021210246A1/ja
Priority to US17/963,223 priority patent/US20230039243A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B19/00—Condensers, e.g. light collectors or similar non-imaging optics
    • G02B19/0033—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use
    • G02B19/0047—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use for use with a light source
    • G02B19/0061—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use for use with a light source the light source comprising a LED
    • 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
    • G02B5/00—Optical elements other than lenses
    • G02B5/04—Prisms
    • G02B5/045—Prism arrays

Definitions

  • An object of the present invention is to realize a lighting device that enables the production of a circular prism sheet, is thin, and can obtain collimated emitted light.
  • FIG. 3 is a cross-sectional view taken along the line AA of FIG. It is a top view of the lighting device.
  • FIG. 5 is a cross-sectional view taken along the line BB of FIG. It is an exploded perspective view of a lighting device.
  • FIG. 7 is a cross-sectional view taken along the line CC of FIG. 7 showing a cross-sectional view of the vicinity of the axis of the frame.
  • FIG. 10A is a plan view showing the configuration of the prism array of the lower light guide plate 13.
  • the region 131 in which the prism array is formed and the region 132 in which the prism array is not formed are alternately arranged.
  • the prism array formed on the upper side (hereinafter also referred to as the main surface side) of the light guide plate 13 is formed radially in the radial direction, and the prism array formed on the lower side (hereinafter also referred to as the back surface side) of the light guide plate 13 is concentric. Is.
  • the LED 20 is arranged so as to face the inner side surface of the region where the prism array is formed.
  • the pitch of the prism array formed on any surface of the light guide plate 13 is much smaller than the height and pitch of the prism array in the prism sheet 15 described later. Therefore, a very dense prism array is formed on the main surface and the back surface of the light guide plate 13.
  • the prism array formed on the light guide plate 13 has been described as a protruding prism array, but the same effect can be obtained by forming a V-groove on the surface of the prism array.
  • the prism sheet 15 formed in this way for the lighting device, it is possible to realize a lighting device having a small orientation angle, for example, about 12 degrees.
  • the prism sheet described above can be used not only for the lighting device shown in FIG. 5 or FIG. 6 but also for various lighting devices.
  • the present invention can also be applied to a prism sheet formed by a plurality of similar ellipses. This is because, in this case as well, a closed curved surface is formed in the V-groove between the plurality of ellipses. However, the effect of light convergence by a plurality of similar ellipses is slightly different in the major axis direction and the minor axis direction of the ellipse.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Elements Other Than Lenses (AREA)
  • Planar Illumination Modules (AREA)
PCT/JP2021/003742 2020-04-15 2021-02-02 プリズムシート及びこれを用いた照明装置 Ceased WO2021210246A1 (ja)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CN202180020187.XA CN115280062A (zh) 2020-04-15 2021-02-02 棱镜片和使用了该棱镜片的照明装置
JP2022515214A JPWO2021210246A1 (https=) 2020-04-15 2021-02-02
US17/963,223 US20230039243A1 (en) 2020-04-15 2022-10-11 Prism sheet and lighting device using the same

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2020072757 2020-04-15
JP2020-072757 2020-04-15

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US17/963,223 Continuation US20230039243A1 (en) 2020-04-15 2022-10-11 Prism sheet and lighting device using the same

Publications (1)

Publication Number Publication Date
WO2021210246A1 true WO2021210246A1 (ja) 2021-10-21

Family

ID=78084220

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2021/003742 Ceased WO2021210246A1 (ja) 2020-04-15 2021-02-02 プリズムシート及びこれを用いた照明装置

Country Status (4)

Country Link
US (1) US20230039243A1 (https=)
JP (1) JPWO2021210246A1 (https=)
CN (1) CN115280062A (https=)
WO (1) WO2021210246A1 (https=)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62153709U (https=) * 1986-03-24 1987-09-29
JP2004191718A (ja) * 2002-12-12 2004-07-08 Mitsubishi Electric Corp Ｌｅｄ光源装置
WO2009128885A1 (en) * 2008-04-14 2009-10-22 Pixtronix, Inc. Light guides and backlight systems incorporating prismatic structures and light redirectors
JP2015072335A (ja) * 2013-10-02 2015-04-16 株式会社ニコン 集光装置の生産方法、集光装置、および光発電装置
US20160146427A1 (en) * 2014-11-21 2016-05-26 Genius Electronic Optical Co., Ltd. Lens for an illuminating device

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8163580B2 (en) * 2005-08-10 2012-04-24 Philips Lumileds Lighting Company Llc Multiple die LED and lens optical system
JPWO2008140084A1 (ja) * 2007-05-14 2010-08-05 三菱レイヨン株式会社 液晶表示装置、面光源装置及びプリズムシート、並びにこれらの製造方法
US9411212B2 (en) * 2013-01-25 2016-08-09 Canon Kabushiki Kaisha Illumination apparatus which is arrangeable so as to surround an image capturing lens
JP6390194B2 (ja) * 2014-06-18 2018-09-19 オムロン株式会社 光学素子及び面光源装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62153709U (https=) * 1986-03-24 1987-09-29
JP2004191718A (ja) * 2002-12-12 2004-07-08 Mitsubishi Electric Corp Ｌｅｄ光源装置
WO2009128885A1 (en) * 2008-04-14 2009-10-22 Pixtronix, Inc. Light guides and backlight systems incorporating prismatic structures and light redirectors
JP2015072335A (ja) * 2013-10-02 2015-04-16 株式会社ニコン 集光装置の生産方法、集光装置、および光発電装置
US20160146427A1 (en) * 2014-11-21 2016-05-26 Genius Electronic Optical Co., Ltd. Lens for an illuminating device

Also Published As

Publication number Publication date
US20230039243A1 (en) 2023-02-09
CN115280062A (zh) 2022-11-01
JPWO2021210246A1 (https=) 2021-10-21

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