WO2018221579A1 - Support d'intégrateur optique et unité d'intégrateur optique - Google Patents

Support d'intégrateur optique et unité d'intégrateur optique Download PDF

Info

Publication number
WO2018221579A1
WO2018221579A1 PCT/JP2018/020750 JP2018020750W WO2018221579A1 WO 2018221579 A1 WO2018221579 A1 WO 2018221579A1 JP 2018020750 W JP2018020750 W JP 2018020750W WO 2018221579 A1 WO2018221579 A1 WO 2018221579A1
Authority
WO
WIPO (PCT)
Prior art keywords
optical integrator
light
refractive index
holder
integrator
Prior art date
Application number
PCT/JP2018/020750
Other languages
English (en)
Japanese (ja)
Inventor
寿行 高岩
大地 酒井
黒田　敏裕
山口　正利
裕 川上
駿 檜山
川村　友人
拓馬 久野
Original Assignee
日立化成株式会社
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 日立化成株式会社 filed Critical 日立化成株式会社
Priority to JP2019521267A priority Critical patent/JPWO2018221579A1/ja
Priority to KR1020197029709A priority patent/KR20200013635A/ko
Publication of WO2018221579A1 publication Critical patent/WO2018221579A1/fr

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S2/00—Systems of lighting devices, not provided for in main groups F21S4/00 - F21S10/00 or F21S19/00, e.g. of modular construction
    • 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
    • F21V15/00—Protecting lighting devices from damage
    • F21V15/01—Housings, e.g. material or assembling of housing parts
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details

Definitions

  • the present invention relates to an optical integrator holder for holding an optical integrator and an optical integrator unit using the optical integrator holder.
  • optical integrator incorporated in a projection display device.
  • Optical integrators incorporated in projection display devices include rod integrators and fly eye integrators.
  • the rod integrator In the rod integrator, light incident from one end face of the rod is reflected in-plane within the rod and overlapped on the exit surface to make the luminance distribution uniform.
  • the rod integrator has an advantage that it can easily cope with the miniaturization of the projection display device as compared with the fly eye integrator, and is suitable for a projection display device using a light emitting element as a light source.
  • rod integrator rods There are two types of rod integrator rods: solid rods such as glass rods and hollow rods made by bonding mirrors.
  • solid rods such as glass rods
  • hollow rods made by bonding mirrors In the hollow rod, light is reflected by using a reflecting surface of a mirror on which silver or aluminum or the like is vapor-deposited, so that a reflection loss occurs during repeated in-plane reflection.
  • a solid rod has an advantage that reflection loss is less than that of a hollow rod because in-plane reflection is almost total reflection.
  • the solid rods are randomly filled with scattering particles that have the function of scattering light, and light is made uniform using scattering.
  • the technique which performs is disclosed (patent document 1). According to the technique of Patent Document 1, it is possible to realize an optical integrator that exhibits the same function with a more compact size compared to the case of using a conventional solid rod that makes light uniform by repeating total reflection. .
  • the present invention solves the above-mentioned problems and improves light emission efficiency in an optical integrator unit using an optical integrator that makes light uniform by utilizing light scattering by scattering particles filled in a solid rod.
  • the technology to do is provided.
  • the present invention provides the following [1] to [8].
  • the optical integrator includes a solid rod having a light incident surface, a light emitting surface that emits the light, and a side surface that connects the light incident surface and the light emitting surface.
  • substantially parallel may be substantially parallel, may or may not mean complete parallelism, and allows an error within a range that does not significantly impair the effects of the invention.
  • proximity means that it is a neighborhood with no contact.
  • the optical integrator holder configured as described above is provided. By using it, the leakage light from the side surface of the optical integrator can be reflected by the reflecting surface of the optical integrator housing space and collected again in the optical integrator, and the light emission efficiency can be improved.
  • the optical integrator unit 10 of the present embodiment includes a light source 1, an optical integrator 2 disposed on the optical axis of the light source 1, and an optical integrator accommodation space 3 for accommodating the optical integrator 2. It consists of an optical integrator holder 5.
  • the present embodiment will be described as an integrator unit including a light source, the light source may be provided outside the integrator unit.
  • the optical integrator housing space 3 has a reflecting surface 6 that regularly or irregularly reflects the leaked light from the side surface 9 of the optical integrator.
  • the optical integrator 2 only needs to have an incident surface 7, an exit surface 8, and a side surface 9.
  • Other shapes are not particularly limited, and for example, a rectangular or polygonal prism having a cross section, a truncated pyramid having a small incident side and a large emitting side, a circular column, or the like can be used.
  • the incident surface 7 means a surface on which light from the light source 1 such as an LED is incident
  • the exit surface 8 means a surface that emits incident light
  • the side surface 9 means the incident surface 7 and It means the surface connecting the exit surface 8.
  • the light integrator 2 of the present embodiment is made of a solid member containing scattering particles therein, and includes a scattering medium having a refractive index N1 and scattering particles having a refractive index N2 different from the refractive index N1.
  • Part 11 A light ray having an incident angle larger than the critical angle cannot travel from a medium having a high refractive index to a medium having a low refractive index. Therefore, in an optical integrator consisting only of a medium having a refractive index N1, the in-plane reflection is almost totally reflected.
  • leakage light Light leakage (hereinafter referred to as leakage light) does not occur, but in the light scattering unit 11 in which the medium having the refractive index N1 contains scattering particles having the refractive index N2 different from the refractive index N1, the leakage light Occurs.
  • this leaked light is regularly reflected or irregularly reflected by the reflecting surface 6 of the optical integrator housing space 3 and collected inside the optical integrator 2, so that the light emission efficiency caused by the leaked light is reduced. By avoiding this, the light emission efficiency can be improved.
  • the entire optical integrator 2 includes a light scattering portion 11.
  • the incident surface 7 side is a total reflection part 12 made of only a medium having a refractive index N1
  • the exit surface 8 side is a medium having a refractive index N1.
  • the ratio between the total reflection portion 12 and the light scattering portion 11 is preferably 1: 1 to 10: 1, and more preferably 1.5: 1 to 5: 1.
  • an arbitrary resin can be selected from a photocurable resin, a thermosetting resin, a thermoplastic resin, and the like.
  • a photocurable resin the advantage that mixing with scattering particles is easy, the advantage that work efficiency is improved because a step such as cooling and drying is not required after curing, and a predetermined The advantage that it can be easily formed into a shape is obtained.
  • the utilization efficiency of light can be improved by selecting acrylic resin or the like.
  • the scattering particles having a refractive index of N2 particles made of plastic, glass, or other materials can be used.
  • the scattering particles have a spherical shape or other shapes. Cost can be suppressed by using a general-purpose product in a spherical shape.
  • the particle size of 90% or more of the scattering particles is preferably in the range of 0.5 ⁇ m or more and 5 ⁇ m or less. Light tends to scatter as the particle size becomes smaller, and if the scattering occurs excessively, the light extraction efficiency tends to decrease. On the other hand, as the particle size increases, light tends to become difficult to scatter. By keeping the particle size of the scattering particles in the above range, a sufficient light diffusion effect can be obtained without reducing the light extraction efficiency.
  • Either the refractive index N1 or the refractive index N2 may be large, but the difference between the refractive index N1 and the refractive index N2 is preferably 0.005 or more.
  • the difference between the refractive index N1 and the refractive index N2 is 0.005 or more and 0.015 or less, the specific gravity of the scattering particles and the solid member can be easily approached, and the scattering particles can be easily mixed with the solid member. Become. In addition, a sufficient light diffusion effect can be obtained.
  • the content of the scattering particles is preferably 0.1 to 10% by volume, more preferably 0.5 to 3% by volume, and can be adjusted according to the uniformity and / or the amount of light emitted from the exit surface. it can.
  • the light scattering portion 11 in which the medium having the refractive index N1 contains the scattering particles having the refractive index N2 it is possible to make the content of the scattering particles different so that more scattering particles are contained on the exit surface 5 side. .
  • the light scattering unit 11 in which the scattering medium having the refractive index N2 is contained in the medium having the refractive index N1 has been described.
  • the surface of the optical integrator 2 may be provided with an uneven shape to scatter light. .
  • the optical integrator holder 5 has an optical integrator accommodating space 3 portion and a housing 4 portion.
  • the optical integrator housing space 3 has a reflecting surface 6 that regularly reflects or irregularly reflects leaked light from the side surface of the optical integrator.
  • the reflectance of the reflecting surface 6 is preferably as high as possible in a range exceeding 0%.
  • the internal space surrounded by the housing 4 is used as the optical integrator housing space 3, and the wall surface of the housing 4 facing the optical integrator housing space 3 is used as the reflecting surface 6.
  • the wall surface of the housing 4 the reflective surface 6
  • an independent member reflector may be disposed between the wall surface of the housing 4 facing the optical integrator housing space 3 and the side surface 9 of the optical integrator 2 to form the reflecting surface 6.
  • the reflecting surface 6 and the side surface 9 of the optical integrator 2 are preferably arranged in parallel and close to each other. By arranging in this way, the amount of light collected inside the optical integrator 2 can be effectively increased.
  • substantially parallel means that it is only required to be substantially parallel, and it may or may not mean complete parallelism. Specifically, for example, an error within a range that is within a range of ⁇ 10 degrees to 10 degrees from the parallel direction and does not significantly impair the effects of the invention is allowed. Further, here, the proximity means that it is in the vicinity without contact. Specifically, for example, the gap (X) between the optical integrator 2 and the housing 4 is within a range of 0.001 mm to 1 mm, and an error within a range that does not significantly impair the effects of the invention is allowed. From the viewpoint of reducing light leakage, it is preferably 0.001 mm or more and 0.3 mm or less, and more preferably 0.001 mm or more and 0.1 mm or less.
  • the reflective surface 6 is made of a highly reflective material having a high reflectance.
  • the highly reflective material means a material having a reflectance of 85% or more.
  • the reflectivity of the highly reflective material is preferably 88% or more, more preferably 90% or more.
  • the reflective surface 6 can be obtained, for example, by plating or vapor-depositing a metal such as aluminum or silver. Moreover, the reflective surface 6 can also be obtained by comprising a white body made of white silicon or white polycarbonate resin. By configuring the reflecting surface 6 with the above metal or white body, the amount of light collected in the optical integrator 2 can be effectively increased.
  • the reflective surface 6 of the inner wall surface of the housing 4 may be made of a highly reflective material, or the housing 4 itself may be made of a highly reflective material.
  • the housing 4 itself By configuring the housing 4 itself with a highly reflective material and using the inner wall surface of the optical integrator housing space 3 formed in the housing as the reflecting surface 6, the effects of the present invention can be obtained with a simpler configuration.
  • the front luminance of the optical integrator 2 was measured using the optical integrator unit 10 shown in FIGS.
  • the optical integrator 2 has a quadrangular prism shape with a length of 4.15 mm, a height of 1.05 mm, and a width of 1.05 mm.
  • the inside of the medium is filled with a medium having a high refractive index and a refractive index of 1.51, and particles having a high transparency and a refractive index of 1.59 are randomly distributed in the medium.
  • Hitachi Chemical 951 (trade name) manufactured by Hitachi Chemical Co., Ltd. was used as the medium. This is a urethane acrylate-based photo-curing resin.
  • Sekisui Plastics Co., Ltd. Techpolymer SSX-302ABE (trade name) was used.
  • the optical integrator 2 was manufactured as follows. First, 0.6% of the total weight of fine particles was placed in a photo-curing resin and stirred sufficiently, and then defoamed. A metal plate having a thickness of 1.05 mm and a center of which was hollowed by a 60 mm square was manufactured, and a metal plate having both sides sandwiched between glass plates was used as a mold. As a result, a gap having a length of 60 mm, a width of 60 mm, and a depth of 1.05 mm is formed in the mold. The defoamed resin was poured into this void. At this time, air was prevented from entering. Thereafter, a UV lamp was irradiated through the glass to sufficiently cure the resin.
  • the product was taken out and cut into a width of 1.05 mm and a length of 4.15 mm with a dicer (DAC552, manufactured by DISCO Corporation).
  • the side surface was processed using a dicing blade having a particle size of # 5000 under the conditions of a rotation speed of 30,000 rpm and a cutting speed of 1 mm / s.
  • the casing 4 was manufactured by cutting a 2 cm square white polycarbonate (Iupilon EHR3100, manufactured by Mitsubishi Engineering Plastics Co., Ltd.) so that the thickness was 3 mm.
  • the shape is a column having an L-shaped cross section, and two of them are combined so as to surround the outer periphery of the side surface 9 of the optical integrator 2, thereby forming the optical integrator accommodation space 3.
  • the gap (X) between the optical integrator 2 and the housing 4 can be easily adjusted. Further, by adopting the same shape, it is possible to easily perform the work of installing the reflector to be the reflection surface 6 at the location surrounding the outer periphery of the side surface 9 of the optical integrator 2 on the inner surface of the housing 4.
  • the reflection surface 6 was formed by installing the sheet or tape shown in Table 1 below at a location surrounding the outer periphery of the side surface 9 of the optical integrator 2 on the inner surface of the housing 4.
  • a white sheet was selected for the purpose of confirming the effect of diffuse reflection, and was affixed to the above location on the inner surface of the housing 4.
  • Lumirror E20 manufactured by Toray Industries, Inc. was used as a white sheet. When light hits this surface, it was scattered and reflected, and the reflectance was about 90%.
  • a silver sheet was selected for the purpose of confirming the effect of regular reflection, and was affixed to the above location on the inner surface of the housing 4.
  • LED As the light source 1, an LED (LTRB R8SF manufactured by OSRAM) was used. One LED is mounted with three elements of red, blue, and green.
  • the LED is placed in close contact with the center of the incident surface of the light integrator, the anode is shared, a 1 k ⁇ resistor is placed between the ground and the red element, and a 150 ⁇ resistor is placed between the blue element, and 2.7 V is applied to the LED to emit light.
  • the luminance of the front surface of the light integrator was measured using the luminance meter 13.
  • the gap (X) between the optical integrator holder 2 and the housing 4 was set to 0.1 mm.
  • the luminance meter 13 a two-dimensional color luminance meter CA-1500 manufactured by Konica Minolta Co., Ltd. was used. The luminance was evaluated by an average value in the light integrator emission surface.
  • Example 1 When a white sheet was installed on the outer periphery of the side surface of the optical integrator, the luminance was 33,160 cd / m 2 , which was about 9% higher than that without the holder (Comparative Example 2).
  • Example 2 When a silver sheet was installed on the outer periphery of the side surface of the light integrator, the luminance was 33,970 cd / m 2 , which was about 11% higher than that without the holder (Comparative Example 2).
  • Comparative Example 1 When black tape was installed on the outer periphery of the side surface of the optical integrator, the luminance was 30,150 cd / m 2 , which was almost the same as when there was no holder (Comparative Example 2).
  • Example 1 and Example 2 having a reflecting surface in the optical integrator accommodating space, the solid rod is filled with scattering particles, and the light is homogenized using the scattered light.
  • the light emission efficiency can be improved.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Optics & Photonics (AREA)
  • Optical Elements Other Than Lenses (AREA)
  • Projection Apparatus (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Microscoopes, Condenser (AREA)
  • Planar Illumination Modules (AREA)
  • Mounting And Adjusting Of Optical Elements (AREA)

Abstract

Un support d'intégrateur optique ayant un espace de logement d'intégrateur optique, le support d'intégrateur optique ayant, dans l'espace de logement d'intégrateur optique, une surface réfléchissante pour réfléchir ou réfléchir de manière diffuse de la lumière qui fuit d'un intégrateur optique.
PCT/JP2018/020750 2017-05-30 2018-05-30 Support d'intégrateur optique et unité d'intégrateur optique WO2018221579A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2019521267A JPWO2018221579A1 (ja) 2017-05-30 2018-05-30 光インテグレータホルダ及び光インテグレータユニット
KR1020197029709A KR20200013635A (ko) 2017-05-30 2018-05-30 광 인티그레이터 홀더 및 광 인티그레이터 유닛

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2017-107016 2017-05-30
JP2017107016 2017-05-30

Publications (1)

Publication Number Publication Date
WO2018221579A1 true WO2018221579A1 (fr) 2018-12-06

Family

ID=64454656

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2018/020750 WO2018221579A1 (fr) 2017-05-30 2018-05-30 Support d'intégrateur optique et unité d'intégrateur optique

Country Status (4)

Country Link
JP (1) JPWO2018221579A1 (fr)
KR (1) KR20200013635A (fr)
TW (1) TW201908792A (fr)
WO (1) WO2018221579A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7461159B2 (ja) 2020-02-21 2024-04-03 浜松ホトニクス株式会社 プリズムロッドホルダ、レーザモジュール、レーザ加工装置及び保持構造

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005504354A (ja) * 2001-10-01 2005-02-10 スリーエム イノベイティブ プロパティズ カンパニー 光ファイバと共に使用する支持チャネル
JP2012253815A (ja) * 2012-08-28 2012-12-20 Mitsubishi Electric Corp 画像読み取り用ライン光源及び導光ユニット
JP2014182181A (ja) * 2013-03-18 2014-09-29 Ushio Inc 光学ユニット
JP2016065909A (ja) * 2014-09-24 2016-04-28 日立化成株式会社 光積分器および、それを用いた映像投射装置
WO2017013816A1 (fr) * 2015-07-22 2017-01-26 日立化成株式会社 Dispositif d'éclairage, procédé d'éclairage et dispositif de projection d'image les utilisant

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005504354A (ja) * 2001-10-01 2005-02-10 スリーエム イノベイティブ プロパティズ カンパニー 光ファイバと共に使用する支持チャネル
JP2012253815A (ja) * 2012-08-28 2012-12-20 Mitsubishi Electric Corp 画像読み取り用ライン光源及び導光ユニット
JP2014182181A (ja) * 2013-03-18 2014-09-29 Ushio Inc 光学ユニット
JP2016065909A (ja) * 2014-09-24 2016-04-28 日立化成株式会社 光積分器および、それを用いた映像投射装置
WO2017013816A1 (fr) * 2015-07-22 2017-01-26 日立化成株式会社 Dispositif d'éclairage, procédé d'éclairage et dispositif de projection d'image les utilisant

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7461159B2 (ja) 2020-02-21 2024-04-03 浜松ホトニクス株式会社 プリズムロッドホルダ、レーザモジュール、レーザ加工装置及び保持構造

Also Published As

Publication number Publication date
TW201908792A (zh) 2019-03-01
KR20200013635A (ko) 2020-02-07
JPWO2018221579A1 (ja) 2020-04-02

Similar Documents

Publication Publication Date Title
JP6986568B2 (ja) 片側バックライト、マルチビューディスプレイ、および傾斜回折格子を使用する方法
JP5702151B2 (ja) 構造化フィルムを有する中空のバックライト
US11035993B2 (en) Illumination systems employing thin and flexible waveguides with light coupling structures
JP5442628B2 (ja) レーザー光用の光拡散セル、これを用いた光源装置および画像表示装置
JP2020500397A (ja) 指向性散乱機構を使用するモード選択可能なバックライト、方法、及びディスプレイ
KR102017398B1 (ko) 광 적분기 및 그것을 사용한 영상 투사 장치
TW200817780A (en) Backlight suitable for display devices
JP2020523737A (ja) 光源とそれを使用したマルチビューバックライト
JP2006138938A (ja) スクリーン及びこれを用いた画像投影システム
TW200839305A (en) Diffuser sheet and backlight unit using it
JP7308275B2 (ja) 光マスク素子を有する、マルチビューバックライト、マルチビューディスプレイ、及びその方法
WO2018221579A1 (fr) Support d'intégrateur optique et unité d'intégrateur optique
KR101949667B1 (ko) 조명 장치
JP6020457B2 (ja) スクリーン
JPWO2017104058A1 (ja) 表示装置
WO2018166177A1 (fr) Dispositif d'affichage transparent
TW201606391A (zh) 背光照明裝置
JP2019046751A (ja) 発光装置、面光源装置および表示装置
CN112889188A (zh) 亮度和均匀性增强的投影仪屏幕
TWI388890B (zh) 導光板及背光模組
JP4727962B2 (ja) スクリーン及び画像投影システム
WO2017145240A1 (fr) Dispositif d'affichage
WO2019039366A1 (fr) Dispositif électroluminescent, dispositif source de lumière en surface et élément de commande de flux lumineux
JP2015064497A (ja) リニアフレネルレンズシート及び透過型表示装置
JP2015503820A (ja) センサを備える光学装置、及びその製造及び使用方法

Legal Events

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

Ref document number: 18808802

Country of ref document: EP

Kind code of ref document: A1

ENP Entry into the national phase

Ref document number: 2019521267

Country of ref document: JP

Kind code of ref document: A

ENP Entry into the national phase

Ref document number: 20197029709

Country of ref document: KR

Kind code of ref document: A

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 18808802

Country of ref document: EP

Kind code of ref document: A1