WO2014061492A1 - 光学装置およびそれを備えた表示装置 - Google Patents
光学装置およびそれを備えた表示装置 Download PDFInfo
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- WO2014061492A1 WO2014061492A1 PCT/JP2013/077243 JP2013077243W WO2014061492A1 WO 2014061492 A1 WO2014061492 A1 WO 2014061492A1 JP 2013077243 W JP2013077243 W JP 2013077243W WO 2014061492 A1 WO2014061492 A1 WO 2014061492A1
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- 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
- G02F1/169—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 orientable non-spherical particles having a common optical characteristic, e.g. suspended particles of reflective metal flakes
-
- 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
- G02F1/17—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 variable-absorption elements not provided for in groups G02F1/015 - G02F1/169
- G02F1/172—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 variable-absorption elements not provided for in groups G02F1/015 - G02F1/169 based on a suspension of orientable dipolar particles, e.g. suspended particles displays
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
- G09G3/3611—Control of matrices with row and column drivers
- G09G3/3648—Control of matrices with row and column drivers using an active matrix
- G09G3/3651—Control of matrices with row and column drivers using an active matrix using multistable liquid crystals, e.g. ferroelectric liquid crystals
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
- G09G3/3611—Control of matrices with row and column drivers
- G09G3/3696—Generation of voltages supplied to electrode drivers
-
- 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
- G02F2201/00—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00
- G02F2201/12—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00 electrode
- G02F2201/124—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00 electrode interdigital
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0233—Improving the luminance or brightness uniformity across the screen
Definitions
- the reflective particles 832 when a voltage is applied between the ITO layers 870a and 870b formed on the side surfaces of the spacers 860a and 860b, the reflective particles 832 have the longitudinal direction parallel to the electric field direction. That is, the orientation is such that the longitudinal direction is parallel to the substrate surface. Thereby, the reflectance of the suspension layer 830 increases (transmittance decreases). Thus, in the suspended particle device 800, the transmittance and the reflectance can be changed by changing the direction of the applied electric field.
- a display device includes an optical device having the above-described configuration.
- the display device described above includes a plurality of pixels arranged in a matrix, and the first substrate includes the first electrode and the second electrode in each of the plurality of pixels.
- the orientation direction of the shape anisotropic particles 32 changes depending on the direction of the electric field applied to the optical layer 30. That is, when a vertical electric field is generated in the optical layer 30 by the first electrode 11 and the second electrode 12 and the third electrode 21, a horizontal electric field is generated in the optical layer 30 by the first electrode 11 and the second electrode 12.
- the orientation direction of the shape anisotropic particles 32 differs depending on the generated case. Since the shape anisotropic particles 32 have shape anisotropy, when the orientation direction of the shape anisotropic particles 32 changes, the substrate surface of the shape anisotropic particles 32 (the substrate surface of the first substrate 10). The projected area on the surface also changes, and the reflectance of the optical layer 30 changes accordingly. In the display device 110 of the present embodiment, display is performed using this fact.
- the display device 110 (display panel 100) of the present embodiment can achieve a high contrast ratio and high light utilization efficiency with a simple configuration.
- the length l of the shape anisotropic particle 32 is such that the width w 1 of the branch portion 11a of the first electrode 11 and the width of the branch portion 12a of the second electrode 12 When it is smaller than w 2 or larger than 1.8 times the inter-electrode distance g, the shape anisotropic particles 32 may not be oriented in a desired direction.
- the insulating layer is formed on the surface, an effect of preventing conduction due to contact between the shape anisotropic particles 32 formed of a metal material, aggregation due to physical interaction, and the like can be obtained.
- shape anisotropic particles 32 for example, when the metal material is aluminum, aluminum flakes having a surface coated with a resin material (for example, acrylic resin), aluminum flakes having a SiO 2 layer formed on the surface, Aluminum flakes having an aluminum oxide layer formed on the surface can be used. Of course, a metal material other than aluminum may be used as the metal material. Further, the shape anisotropic particles 32 may be colored.
- the thickness of the shape anisotropic particle 32 is not particularly limited. However, since the transmittance of the optical layer 30 in the transparent state can be increased as the thickness of the shape anisotropic particle 32 is smaller, the thickness of the shape anisotropic particle 32 is smaller than the inter-electrode distance g. (For example, 4 ⁇ m or less) is preferable, and it is more preferable that the wavelength is equal to or less than the wavelength of light (for example, 0.5 ⁇ m or less).
- the width w 1 of the branch portion 11a of the first electrode 11, the width w 2 of the branch portion 12a of the second electrode 12, and the inter-electrode distance g are expressed by the above formulas (2), (3) and (4) (preferably the formula (5) and (6) are not particularly limited as long as they are satisfied.
- FIG. 6B is a microscopic image showing an orientation state when a vertical electric field (AC voltage of 1.5 V) is applied to the optical layer 30 of the prototype display device 110.
- the shape anisotropic particles 32 are substantially perpendicular to the substrate surface and the thickness direction thereof is substantially parallel to the extending direction of the branch portions 11a and 11b. (For example, note the region surrounded by a circle in FIG. 6B).
- both the orientation of the shape anisotropic particles 32 by the longitudinal electric field and the orientation of the shape anisotropic particles 32 by the transverse electric field can be controlled by AC driving.
- the applied voltage is about 1 V to 1.5 V, which is lower than that of a general liquid crystal display device. That is, it can be said that the display device 110 of this embodiment is excellent in low power consumption.
- the orientation direction of the shape anisotropic particles 32 has a correlation with the extending direction of the branch portions 11a and 12a of the first electrode 11 and the second electrode 12 which are comb-like electrodes.
- FIGS. 8A and 8B show a display device 210 in this embodiment.
- FIGS. 8A and 8B are cross-sectional views schematically showing the display device 210.
- FIG. 8A and 8B are cross-sectional views schematically showing the display device 210.
- the display device 210 includes a display panel 200 and has a plurality of pixels arranged in a matrix.
- the display device 210 further includes a backlight (illumination device) 201 disposed on the back side of the display panel (optical device) 200, and in a transmissive mode using light emitted from the backlight 201 to the display panel 200. It is a transmissive display device capable of performing display.
- the orientation direction of the shape anisotropic particles 32 is changed by changing the direction of the electric field applied to the optical layer 30.
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- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Optics & Photonics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Computer Hardware Design (AREA)
- Theoretical Computer Science (AREA)
- Electrochromic Elements, Electrophoresis, Or Variable Reflection Or Absorption Elements (AREA)
Abstract
Description
図1(a)および(b)に、本実施形態における表示装置110を示す。図1(a)および(b)は、表示装置110を模式的に示す断面図である。
w1<l ・・・(2)
w2<l ・・・(3)
g≦l≦w1+w2+g ・・・(4)
w1≦l≦1.8g ・・・(5)
w2≦l≦1.8g ・・・(6)
w<l ・・・(7)
g≦l≦2w+g ・・・(8)
w≦l≦1.8g ・・・(9)
図8(a)および(b)に、本実施形態における表示装置210を示す。図8(a)および(b)は、表示装置210を模式的に示す断面図である。
10a 基板
11 第1電極(櫛歯状電極)
11a 第1電極の枝部
11b 第1電極の幹部
12 第2電極(櫛歯状電極)
12a 第2電極の枝部
12b 第2電極の幹部
14 光吸収層
20 第2基板
20a 基板
21 第3電極(べた電極)
30 光学層(表示媒体層)
31 媒体
32 形状異方性粒子
41、42 リレー回路(スイッチ回路)
51 第1電源
52 第2電源
100、200 表示パネル(光学装置)
201 バックライト(照明装置)
110、210 表示装置
Claims (13)
- 互いに対向するように設けられた第1基板および第2基板と、
前記第1基板および前記第2基板の間に設けられた光学層と、を備えた光学装置であって、
前記第1基板は、第1電極および第2電極を有し、
前記第2基板は、前記第1電極および前記第2電極に対向する第3電極を有し、
前記光学層は、媒体と、前記媒体中に分散され、形状異方性を有する形状異方性粒子とを含み、
前記第1電極および前記第2電極のそれぞれは、複数の枝部を有する櫛歯状電極であり、
前記第1電極と前記第2電極とは、それぞれの前記複数の枝部が所定の間隙を介して噛合するように配置されており、
前記形状異方性粒子は、前記光学層に印加された電界の方向に応じて配向方向が変化し、
前記第1電極の前記複数の枝部のそれぞれの幅をw1、前記第2電極の前記複数の枝部のそれぞれの幅をw2、前記所定の間隙をg、前記形状異方性粒子の長さをlとすると、w1<l、w2<lおよびg≦l≦w1+w2+gの関係が満足される光学装置。 - w1≦l≦1.8gおよびw2≦l≦1.8gの関係が満足される請求項1に記載の光学装置。
- 前記第1電極および第2電極と、前記第3電極とによって前記光学層に縦電界が生成された場合と、前記第1電極と前記第2電極とによって前記光学層に横電界が生成された場合とで、前記形状異方性粒子の配向方向が異なる請求項1または2に記載の光学装置。
- 前記光学層に縦電界が生成された場合、前記形状異方性粒子は、前記第1基板の基板面に略垂直になるように配向し、
前記光学層に横電界が生成された場合、前記形状異方性粒子は、前記第1基板の基板面に略平行になるように配向する請求項3に記載の光学装置。 - 前記形状異方性粒子の誘電率εpと、前記媒体の誘電率εmとが異なる請求項1から4のいずれかに記載の光学装置。
- 前記媒体の誘電率εmは、前記形状異方性粒子の誘電率εpよりも1以上大きい請求項5に記載の光学装置。
- 前記形状異方性粒子は、光反射性を有する請求項1から6のいずれかに記載の光学装置。
- 前記形状異方性粒子は、フレーク状である請求項1から7のいずれかに記載の光学装置。
- 請求項1から8のいずれかに記載の光学装置を備えた表示装置。
- マトリクス状に配列された複数の画素を有し、
前記第1基板は、前記複数の画素のそれぞれに、前記第1電極および前記第2電極を有する請求項9に記載の表示装置。 - 外部から入射する光を用いて反射モードで表示を行うことができる請求項9または10に記載の表示装置。
- 前記第1基板および前記第2基板のうちの背面側に位置する方の基板は、光を吸収する光吸収層を有する請求項11に記載の表示装置。
- 前記光学装置の背面側に配置されたバックライトをさらに備え、
前記バックライトから前記光学装置に照射された光を用いて透過モードで表示を行うことができる請求項9または10に記載の表示装置。
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US14/436,148 US9653037B2 (en) | 2012-10-17 | 2013-10-07 | Optical device and display device provided with same |
JP2014542061A JP5906321B2 (ja) | 2012-10-17 | 2013-10-07 | 光学装置およびそれを備えた表示装置 |
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JP2012-230188 | 2012-10-17 | ||
JP2012230188 | 2012-10-17 |
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Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2016063880A1 (ja) * | 2014-10-24 | 2016-04-28 | シャープ株式会社 | 表示装置 |
WO2016072363A1 (ja) * | 2014-11-06 | 2016-05-12 | シャープ株式会社 | 光学装置 |
WO2016080244A1 (ja) * | 2014-11-19 | 2016-05-26 | シャープ株式会社 | 光学装置 |
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US10372009B2 (en) * | 2015-08-11 | 2019-08-06 | Sharp Kabushiki Kaisha | Optical device |
Citations (2)
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WO2008012934A1 (fr) * | 2006-07-24 | 2008-01-31 | Isao Ota | Dispositif d'affichage et son procédé de fabrication |
WO2012008253A1 (ja) * | 2010-07-14 | 2012-01-19 | シャープ株式会社 | 微細な物体の配置方法、配列装置、照明装置および表示装置 |
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US6665042B1 (en) | 2000-05-16 | 2003-12-16 | The University Of Rochester | Electrically switchable polymer liquid crystal and polymer birefringent flake in fluid host systems and optical devices utilizing same |
US6829075B1 (en) | 2003-05-20 | 2004-12-07 | The University Of Rochester | Electrically addressable optical devices using a system of composite layered flakes suspended in a fluid host to obtain angularly dependent optical effects |
GB0322231D0 (en) | 2003-09-23 | 2003-10-22 | Koninkl Philips Electronics Nv | Transflector and transflective display |
JPWO2005059637A1 (ja) * | 2003-12-18 | 2007-12-13 | シャープ株式会社 | 表示装置 |
US8754836B2 (en) * | 2006-12-29 | 2014-06-17 | Lg Display Co., Ltd. | Liquid crystal device and method of driving the same |
JP2010157475A (ja) * | 2009-01-05 | 2010-07-15 | Sony Corp | 照明装置および表示装置 |
JP5556762B2 (ja) * | 2011-08-01 | 2014-07-23 | 日立化成株式会社 | 懸濁粒子装置,懸濁粒子装置を用いた調光装置及びそれらの駆動方法 |
WO2013108899A1 (ja) | 2012-01-19 | 2013-07-25 | シャープ株式会社 | 表示パネルおよび表示装置 |
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- 2013-10-07 US US14/436,148 patent/US9653037B2/en not_active Expired - Fee Related
- 2013-10-07 WO PCT/JP2013/077243 patent/WO2014061492A1/ja active Application Filing
- 2013-10-07 JP JP2014542061A patent/JP5906321B2/ja active Active
Patent Citations (2)
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WO2008012934A1 (fr) * | 2006-07-24 | 2008-01-31 | Isao Ota | Dispositif d'affichage et son procédé de fabrication |
WO2012008253A1 (ja) * | 2010-07-14 | 2012-01-19 | シャープ株式会社 | 微細な物体の配置方法、配列装置、照明装置および表示装置 |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2016063880A1 (ja) * | 2014-10-24 | 2016-04-28 | シャープ株式会社 | 表示装置 |
WO2016072363A1 (ja) * | 2014-11-06 | 2016-05-12 | シャープ株式会社 | 光学装置 |
WO2016080244A1 (ja) * | 2014-11-19 | 2016-05-26 | シャープ株式会社 | 光学装置 |
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JPWO2014061492A1 (ja) | 2016-09-05 |
US9653037B2 (en) | 2017-05-16 |
JP5906321B2 (ja) | 2016-04-20 |
US20150287380A1 (en) | 2015-10-08 |
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