WO2012142877A1 - Élément de roue de conversion de longueur d'onde optique comprenant un film d'amélioration de la luminosité et source optique - Google Patents

Élément de roue de conversion de longueur d'onde optique comprenant un film d'amélioration de la luminosité et source optique Download PDF

Info

Publication number
WO2012142877A1
WO2012142877A1 PCT/CN2012/071793 CN2012071793W WO2012142877A1 WO 2012142877 A1 WO2012142877 A1 WO 2012142877A1 CN 2012071793 W CN2012071793 W CN 2012071793W WO 2012142877 A1 WO2012142877 A1 WO 2012142877A1
Authority
WO
WIPO (PCT)
Prior art keywords
wavelength conversion
light
brightness enhancement
enhancement film
conversion wheel
Prior art date
Application number
PCT/CN2012/071793
Other languages
English (en)
Chinese (zh)
Inventor
杨毅
李屹
Original Assignee
深圳市绎立锐光科技开发有限公司
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 深圳市绎立锐光科技开发有限公司 filed Critical 深圳市绎立锐光科技开发有限公司
Publication of WO2012142877A1 publication Critical patent/WO2012142877A1/fr

Links

Classifications

    • 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
    • G02F1/133617—Illumination with ultraviolet light; Luminescent elements or materials associated to the cell
    • 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
    • G02F1/133504—Diffusing, scattering, diffracting elements
    • G02F1/133507—Films for enhancing the luminance
    • 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
    • G03B21/20—Lamp housings
    • G03B21/2006—Lamp housings characterised by the light source
    • G03B21/2033—LED or laser light sources
    • G03B21/204—LED or laser light sources using secondary light emission, e.g. luminescence or fluorescence

Definitions

  • the present invention relates to optical devices for controlling the color or direction of light.
  • Liquid crystals themselves do not emit light but can be controlled to change the light transmission characteristics, thereby being continuously applied in the field of display.
  • the backlight used to provide the projected light in combination with the liquid crystal display panel is driven by the market, and continues to develop in a thin and bright direction.
  • 1 shows a typical liquid crystal backlight structure:
  • the bottom of the light guide plate 14 has a reflecting surface 19, and the light emitted by the side light source 18 is guided through the light guiding plate 14 to the liquid crystal panel 20; the brightness enhancement film 10 covers the light guiding plate 14.
  • the brightness enhancement film (BEF) 10 was first disclosed in U.S. Patent No. 4,906,070 to 3M Company. This patent clearly indicates the structure of the brightness enhancement film, as shown in Fig. 1 including a smooth side contacting the light exit surface and an array of prism lines arranged in parallel on the other side.
  • 98804889 and 97192045 disclose an improved structure of the brightness enhancement film 10 described above, one in which an astigmatism layer is added to the original structure, and the other is to adjust the angle of the prism in the original structure.
  • a light wavelength conversion material such as, but not limited to, a phosphor, based on a conventional backlight, is used to generate a backlight having a predetermined color based on light wavelength conversion. Its low cost, high performance and more popular with the market.
  • the brightness enhancement film 10 can also be used to brighten such a backlight.
  • the specific structure is shown in FIG. 2.
  • the excitation light from the excitation light source passes through the filter film 1 and is irradiated onto the phosphor 2, and the phosphor 2 is irradiated.
  • the large-angle excited light (such as R1) is converted into a small angle light by the brightness enhancement film 10 to be emitted, and the small angle excited light (such as R4) is reflected by the brightness enhancement film 10 and then scattered by the phosphor into a large angle to emit light.
  • the brightness enhancement film 10 further increases the total amount of light emitted by the phosphor at a small angle by the excitation light.
  • the filter 1 preferably has a reflection effect on the excited light, thereby reflecting the excited light directed away from the brightness enhancement film 10 to further increase the light exiting brightness of the light source.
  • the above prior art is disadvantageous in that the brightness enhancement film 10 can only be brightened in a direction perpendicular to the stretching direction of a single prism due to the linear arrangement of the prisms, and the brightness enhancement effect cannot be provided along the extending direction of the prism. And with the light
  • the solution adopted by the device to avoid deterioration of the performance of the light source caused by failure of the long-term illumination of the light wavelength conversion material.
  • the brightness enhancement film 10 is not suitable.
  • FIG. 3a and FIG. 3b a plurality of horizontal lines are used to indicate the prisms or prism groups arranged in parallel, black and long.
  • the square is used to indicate the spot of the excitation light, and it is assumed that when the color wheel with the phosphor has the brightness enhancement film as shown in FIG. 3, when the color wheel carries the brightness enhancement film, it rotates to the position shown in FIG.
  • the technical problem to be solved by the present invention is to address the deficiencies of the prior art described above, and to provide a light wavelength conversion wheel assembly and a light source with a brightness enhancement film, which can be applied to a high power light source based on optical wavelength conversion. Stable brightening.
  • One of the technical solutions proposed to solve the above technical problems is to provide a light wavelength conversion wheel assembly comprising a light wavelength conversion wheel carrying one or more light wavelength conversion materials, and a motor for driving the light wavelength conversion wheel to rotate And a bracket for fixing the motor; further comprising a brightness enhancement film, in particular, the brightness enhancement film is fixed on the holder, the smooth surface of the brightness enhancement film is adjacent to the light wavelength conversion wheel and is close to the light wavelength conversion material .
  • the brightness enhancement film completely covers the excitation spot projected on the light wavelength conversion wheel assembly, and the area is much smaller than the distribution area of the light wavelength conversion material.
  • the bracket includes a first bracket and a second bracket fastened together by a fastening device for respectively fixing the brightness enhancement film and the motor.
  • the second bracket is further provided with a hole position, a slot or a positioning frame for fixing the excitation light source.
  • a second technical solution proposed to solve the above technical problem is to provide a light source including an excitation light source and a light wavelength conversion wheel assembly; the light wavelength conversion wheel assembly includes a light wavelength carrying one or more light wavelength conversion materials a conversion wheel and a motor for driving the rotation of the light wavelength conversion wheel; further comprising a brightness enhancement film, in particular, the excitation light source Generating excitation light for exciting the light wavelength conversion material; the smooth surface of the brightness enhancement film is adjacent to the light wavelength conversion wheel and close to the light wavelength conversion material; and the projection light of the excitation light source and the brightness enhancement film are separated from the light
  • the wavelength conversion wheel is opposite; the outer cover or the fixing frame of the light source simultaneously fixes the excitation light source, the light wavelength conversion wheel assembly and the brightness enhancement film, so that when the light source emits light, the light wavelength conversion wheel is driven relative to the brightness under the driving of the motor Enhancement of the film and excitation of the light source.
  • the smooth surface of the brightness enhancement film is plated with a filter layer for reflecting the excitation light and transmitting the excitation light.
  • FIG. 1 is a diagram showing an application structure of a conventional brightness enhancement film on a liquid crystal display device
  • FIG. 2 illustrates the application of a conventional brightness enhancement film on a light source based on light wavelength conversion
  • FIG. 3 illustrates the use effect of the existing brightness enhancement film as the wheel rotates, wherein FIGS. 3a and 3b represent two positions, respectively. On the situation;
  • Figure 4 is a schematic view showing the structure of the optical wavelength conversion wheel assembly of the present invention
  • Figure 5 is a rear and bottom view of the structure of Figure 4;
  • the optical wavelength conversion wheel assembly of the present invention comprises a light wavelength conversion wheel 3 carrying one or more light wavelength conversion materials, a motor 6 connecting and driving the rotation of the light wavelength conversion wheel 3, and a fixed motor.
  • a holder 5 of 6 further comprising a brightness enhancement film 4 fixed to the holder 5, the smooth surface of the brightness enhancement film 5 being in close proximity to the light wavelength conversion wheel 3 and being close to the light wavelength conversion material .
  • the brightness enhancement film is spatially separated from the light wavelength conversion wheel, and the brightness enhancement film does not rotate with the light wavelength conversion wheel, so that the brightness angle of the spot finally obtained after the brightness of the light wavelength conversion wheel is enhanced by the film No change occurs, and the effect of brightness enhancement is reflected.
  • the light wavelength conversion material comprises a phosphor, a nano material or a luminescent dye, which may be bonded together by one or more transparent materials, so that the light source has stable light-emitting characteristics.
  • the transparent material may be a transparent colloid or a transparent glass material, mixed or lysed with the phosphor; or may be a transparent plastic film material, and the phosphor is hot pressed onto the transparent plastic film material.
  • the phosphor can also be held with any of the transparent materials mentioned above, and can be further sealed.
  • the light wavelength conversion material is preferably distributed in a sheet form. Further, in order to increase the light absorption rate of the light wavelength conversion material, scattering particles such as, but not limited to, titanium oxide particles or alumina particles may be mixed in the light wavelength conversion material.
  • the optical wavelength conversion wheel 3 used in the present invention preferably includes a spectroscopic filter for transmitting the excitation light and reflecting the excited light, which is not described herein because it is a prior art.
  • the light wavelength conversion material is generally distributed in a ring shape on the light wavelength conversion wheel 3.
  • the area of the brightness enhancement film 4 corresponds to the area of the excitation spot projected on the light wavelength conversion wheel assembly, which is much smaller than the distribution area of the light wavelength conversion material, and it is preferable that the brightness enhancement film 4 completely covers the excitation light spot.
  • the distance between the brightness enhancement film 4 and the light wavelength conversion wheel 3 is controlled to be less than 0.6 mm.
  • the present invention may further include a filter disposed between the light wavelength conversion material and the brightness enhancement film 4 for reflecting the excitation light and transmitting the excited light to improve the color purity of the light emitted by the light source.
  • the excitation light transmitted through the light wavelength conversion material and not absorbed is reflected back to the light wavelength conversion material for reuse to improve the light conversion efficiency.
  • the filter may be fixed to the optical wavelength conversion wheel 3 by flattening the light wavelength conversion material; however, in order to save material cost, the filter is preferably attached to the bracket 5 with the brightness enhancement film 4 attached thereto.
  • a second filter for transmitting the excitation light and reflecting the excited light is disposed between the excitation light projected by the excitation light source and the light wavelength conversion wheel 3 for reflecting the direction of the incident excitation light.
  • the emitted excited light to the opposite direction will be more conducive to increasing the light exiting brightness of the light source.
  • the second filter can be fixed to the brightness enhancement film 4 via the light wavelength conversion wheel 3 while saving the cost by reducing the area of the second filter substantially in agreement with the brightness enhancement film 4.
  • Figures 5 and 6 illustrate in more detail the construction of a preferred embodiment of the optical wavelength conversion wheel assembly of the present invention.
  • the bracket 5 includes a first bracket 51 and a second bracket 52 that are fastened together by fastening means.
  • the first bracket 51 is used to fix the brightness enhancement film 4
  • the second bracket 52 is used to fix the motor 6, such as but not limited to the screw 63.
  • the first bracket 51 and the second bracket 52 are fixed, for example but not limited to, by fastening screws 53.
  • at least a through hole is formed on the second bracket 52 at a position opposite to the brightness enhancement film 4 via the light wavelength conversion wheel 3, and FIGS. 4 and 6 illustrate the second bracket 52.
  • the hollow structure is equivalent to replacing the through hole.
  • the optical wavelength conversion wheel assembly of the present invention may further be provided with a hole position, a slot or a positioning frame for fixing the excitation light source on the second bracket 52, the position of the hole position, the slot position or the positioning frame or
  • the form depends on the type and size of the excitation light source, and any hole position shown is not uniquely limited.
  • the present invention also separately provides a light source including an excitation light source and an optical wavelength conversion wheel assembly for generating excitation light for exciting a wavelength conversion material of light;
  • the optical wavelength conversion wheel assembly includes a carrier a light wavelength conversion wheel 3 of one or more light wavelength conversion materials and a motor 6 that drives the rotation of the light wavelength conversion wheel; further comprising a brightness enhancement film, the smooth surface of the brightness enhancement film being adjacent to the light wavelength conversion wheel 3 and The light wavelength conversion material is close to each other; the projection light of the excitation light source is opposite to the brightness enhancement film by the light wavelength conversion wheel; the outer cover or the fixing frame of the light source simultaneously fixes the excitation light source, the light wavelength conversion wheel assembly and the brightness enhancement film, so that When the light source emits light, the light wavelength conversion wheel is driven by the motor 6 in rotation relative to the brightness enhancement film and the excitation light source.
  • the outer cover or the fixing frame of the light source is completely realized by the bracket 5 in the optical wavelength conversion wheel assembly of the present invention, that is, the excitation light source is also fixed at the proper position of the bracket 5, the light source of the present invention and the utility model
  • the structure of the optical wavelength conversion wheel assembly is substantially the same.
  • the significance of the light source of the present invention is that existing optical wavelength conversion wheel assemblies can be used without the need to order new optical wavelength conversion wheel assemblies.
  • the area of the brightness enhancement film may also be equivalent to the spot area of the projection light of the excitation light source, which is much smaller than the distribution area of the light wavelength conversion material, and preferably completely covers the projection light. Spot. 6 ⁇
  • the brightness enhancement film and the light wavelength conversion wheel 3 distance is less than 0.
  • a smoothing layer may also be plated on the smooth surface of the brightness enhancement film for reflecting the excitation light and transmitting the excited light.
  • the excitation source can be a solid state light emitting device such as, but not limited to, an LED that emits UV light or a laser device.

Abstract

L'invention concerne un élément de roue de conversion de longueur d'onde optique comprenant un film d'amélioration de la luminosité et une source optique comprenant celui-ci. L'élément de roue de conversion de longueur d'onde optique comprenant un film d'amélioration de la luminosité comprend une roue de conversion de longueur d'onde optique (3) comprenant un ou plusieurs matériaux de conversion de longueur d'onde optique, un moteur (6) permettant d'entraîner la roue de conversion de longueur d'onde optique (3) en rotation, un support (5) permettant la fixation du moteur (6) et un film d'amélioration de la luminosité (4). Le film d'amélioration de la luminosité (4) est fixé sur le support (5) et la surface lisse du film d'amélioration de la luminosité (4) est immédiatement adjacente à la roue de conversion de longueur d'onde optique (3) et proche du matériau de conversion de longueur d'onde optique. Le film d'amélioration de la luminosité (4) de l'élément de roue de conversion de longueur d'onde optique ne tourne pas avec la roue de conversion de longueur d'onde optique (3), l'angle d'éclairage du point lumineux finalement obtenu ne change pas et l'invention présente les avantages suivants : une mise en œuvre facile et un faible coût.
PCT/CN2012/071793 2011-04-22 2012-02-29 Élément de roue de conversion de longueur d'onde optique comprenant un film d'amélioration de la luminosité et source optique WO2012142877A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN2011201222862U CN202065917U (zh) 2011-04-22 2011-04-22 带亮度增强膜的光波长转换轮组件和光源
CN201120122286.2 2011-04-22

Publications (1)

Publication Number Publication Date
WO2012142877A1 true WO2012142877A1 (fr) 2012-10-26

Family

ID=45059779

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2012/071793 WO2012142877A1 (fr) 2011-04-22 2012-02-29 Élément de roue de conversion de longueur d'onde optique comprenant un film d'amélioration de la luminosité et source optique

Country Status (2)

Country Link
CN (1) CN202065917U (fr)
WO (1) WO2012142877A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN202065917U (zh) * 2011-04-22 2011-12-07 绎立锐光科技开发(深圳)有限公司 带亮度增强膜的光波长转换轮组件和光源

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060126031A1 (en) * 2004-11-20 2006-06-15 Samsung Electronics Co., Ltd. Illumination optical system of projection apparatus
US20070019408A1 (en) * 2005-06-07 2007-01-25 Mcguire James P Jr Phosphor wheel illuminator
CN101836160A (zh) * 2007-07-30 2010-09-15 绎立锐光科技开发公司 采用具有波长转换材料的移动模板的多色照明装置
CN101893204A (zh) * 2009-05-20 2010-11-24 绎立锐光科技开发(深圳)有限公司 光源及其光转换方法、光转换装置及该光源的应用系统
CN101923223A (zh) * 2009-06-12 2010-12-22 绎立锐光科技开发(深圳)有限公司 偏振光源及其偏振转换方法、偏振转换装置及应用系统
CN202065917U (zh) * 2011-04-22 2011-12-07 绎立锐光科技开发(深圳)有限公司 带亮度增强膜的光波长转换轮组件和光源

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060126031A1 (en) * 2004-11-20 2006-06-15 Samsung Electronics Co., Ltd. Illumination optical system of projection apparatus
US20070019408A1 (en) * 2005-06-07 2007-01-25 Mcguire James P Jr Phosphor wheel illuminator
CN101836160A (zh) * 2007-07-30 2010-09-15 绎立锐光科技开发公司 采用具有波长转换材料的移动模板的多色照明装置
CN101893204A (zh) * 2009-05-20 2010-11-24 绎立锐光科技开发(深圳)有限公司 光源及其光转换方法、光转换装置及该光源的应用系统
CN101923223A (zh) * 2009-06-12 2010-12-22 绎立锐光科技开发(深圳)有限公司 偏振光源及其偏振转换方法、偏振转换装置及应用系统
CN202065917U (zh) * 2011-04-22 2011-12-07 绎立锐光科技开发(深圳)有限公司 带亮度增强膜的光波长转换轮组件和光源

Also Published As

Publication number Publication date
CN202065917U (zh) 2011-12-07

Similar Documents

Publication Publication Date Title
JP2008147186A (ja) 導光バッファ板を有するバックライトユニット
CN102081187A (zh) 拼接式导光板构造及背光模块
BRPI1106149A2 (pt) unidade de luz de fundo,e, dispositivo de exibiÇço de vÍdeo
CN104456311A (zh) 背光模块及具有该背光模块的液晶显示装置
WO2017024752A1 (fr) Module de rétroéclairage et dispositif d'affichage
JP2009016289A (ja) 光源装置及び光学装置
JP6494617B2 (ja) バックライトモジュール及びこれを用いる液晶表示装置
WO2011066692A1 (fr) Source de rétro-éclairage de type lumière latérale à haute luminance uniforme
WO2013120295A1 (fr) Module de rétroéclairage
CN104456191A (zh) 背光模块及液晶显示装置
JP3187636U (ja) 直取付型エッジライト式バックライトモジュール
CN202647443U (zh) Led背光模组及led液晶显示装置
JP5866164B2 (ja) エリア制御可能なバックライト
WO2013181865A1 (fr) Module de rétroéclairage à éclairage par la tranche
WO2016086473A1 (fr) Module de rétroéclairage et dispositif d'affichage à cristaux liquides
WO2014056266A1 (fr) Module de rétro-éclairage
KR20100095812A (ko) 백 라이트 유닛 및 이를 포함하는 액정표시장치
WO2013139049A1 (fr) Module de rétroéclairage de type latéral
CN100422814C (zh) 背光模块
WO2012142877A1 (fr) Élément de roue de conversion de longueur d'onde optique comprenant un film d'amélioration de la luminosité et source optique
CN201222158Y (zh) 投影光源装置
WO2014040344A1 (fr) Module de rétroéclairage à éclairage direct
JP2012238462A (ja) 光混合ユニット、面光源装置および液晶表示装置
WO2013088594A1 (fr) Appareil de rétroéclairage et appareil à afficheur à cristaux liquides
TWM451470U (zh) 具有導光點的反射片、led平面光源、led平板燈和平板led燈

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: 12774445

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

32PN Ep: public notification in the ep bulletin as address of the adressee cannot be established

Free format text: NOTING OF LOSS OF RIGHTS PURSUANT TO RULE 112(1) EPC (EPO FORM 1205A DATED 27/03/2014)

122 Ep: pct application non-entry in european phase

Ref document number: 12774445

Country of ref document: EP

Kind code of ref document: A1