JP7356798B2 - 表示装置 - Google Patents
表示装置 Download PDFInfo
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- JP7356798B2 JP7356798B2 JP2019001432A JP2019001432A JP7356798B2 JP 7356798 B2 JP7356798 B2 JP 7356798B2 JP 2019001432 A JP2019001432 A JP 2019001432A JP 2019001432 A JP2019001432 A JP 2019001432A JP 7356798 B2 JP7356798 B2 JP 7356798B2
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- Prior art keywords
- light
- wavelength
- wavelength conversion
- layer
- particles
- 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.)
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Images
Classifications
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- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
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- H01L33/48—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor body packages
- H01L33/50—Wavelength conversion elements
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- 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
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- G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
- G02B6/0015—Means for improving the coupling-in of light from the light source into the light guide provided on the surface of the light guide or in the bulk of it
- G02B6/002—Means for improving the coupling-in of light from the light source into the light guide provided on the surface of the light guide or in the bulk of it by shaping at least a portion of the light guide, e.g. with collimating, focussing or diverging surfaces
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- 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
- G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
- G02B6/004—Scattering dots or dot-like elements, e.g. microbeads, scattering particles, nanoparticles
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- G02B6/0033—Means for improving the coupling-out of light from the light guide
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- G02B6/0033—Means for improving the coupling-out of light from the light guide
- G02B6/0058—Means for improving the coupling-out of light from the light guide varying in density, size, shape or depth along the light guide
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- G02B6/0066—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 characterised by the light source being coupled to the light guide
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- 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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L33/00—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L33/48—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor body packages
- H01L33/50—Wavelength conversion elements
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- 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
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- 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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2933/00—Details relating to devices covered by the group H01L33/00 but not provided for in its subgroups
- H01L2933/0091—Scattering means in or on the semiconductor body or semiconductor body package
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- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L33/00—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L33/48—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor body packages
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- H01L33/48—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor body packages
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Description
、III-V族化合物、IV-VI族化合物、I-III-VI族化合物、II-IV-VI族化合物およ
びII-IV-V族化合物のうちの少なくとも一つを含むことができる。
A2 散乱粒子35は、波長変換層30の2重量%以下、例えば0.5~1.5重量%含まれる。
B2 近紫外または紫色の光を青色光に変化する波長変換粒子P1は、LEDチップを被覆するバインダー層450中、及び/または、波長変換層30中に含まれる。
C 散乱粒子35には、純度が高い(例えば99.9%以上)の結晶粒子であって、長方形状などの角張ったものを用いる。
D アナターゼ型が維持されるべく、波長変換層30及びこれを覆うパッシベーション層40を形成する際には、工程温度を、例えば400℃以下とする。
300 表示パネル
400 光源
500 ハウジング
Claims (14)
- 導光板と、前記導光板上に配置され、TiO2のアナターゼ結晶形の散乱粒子であって粒子サイズが200nm以下の散乱粒子を含む波長変換層とを含む光学部材;および
前記導光板の一側面に配置された光源;を含み、
前記光源は、第1波長の第1光を前記導光板に提供し、前記波長変換層は、前記第1光を第2波長の光に変換する第1波長変換粒子、および前記第1光を第3波長の光に変換する第2波長変換粒子を含み、
前記光源は第1波長と異なる第5波長の第2光を前記導光板に提供し、前記第1波長変換粒子は前記第2光を前記第2波長の光に変換し、前記第2波長変換粒子は前記第2光を前記第3波長の光に変換し、
前記第1波長および前記第5波長が青色光または近紫外線の波長範囲内にあり、
前記第1波長が320nm乃至420nmであり、前記第5波長が420nm乃至470nmであり、
前記第2波長が緑色光の波長範囲内にあり、前記第3波長が赤色光の波長範囲内にあり、
前記光学部材は前記導光板と前記波長変換層との間に配置された低屈折層をさらに含み、前記導光板、前記低屈折層および前記波長変換層は互いに結合して一体化されており、
前記波長変換層および前記低屈折層を覆うパッシベーション層をさらに含み、
前記波長変換層は、前記低屈折層よりも厚く、厚さが10~50μmであり、
前記波長変換層の側面は前記低屈折層の側面に整列され、前記パッシベーション層は、前記低屈折層が露出する前記導光板の縁部の上面にまで延びて、縁部の一部が前記導光板の上面に直接接しており、
前記波長変換層の側面は、前記低屈折層の側面より緩やかな傾斜角を持つ、バックライトユニット。 - 前記光源が、前記第1光を発光する発光素子、および前記第1光を前記第5波長の前記第2光に変換する第3波長変換粒子を含む、請求項1に記載のバックライトユニット。
- 前記第1波長変換粒子が量子ドットを含み、前記第2波長変換粒子がKSF蛍光物質を含む、請求項1に記載のバックライトユニット。
- 前記第1波長変換粒子及び前記第2波長変換粒子が、それぞれ、カドミウム(Cd)化合物、及び、インジウム(In)化合物を含む請求項1または3に記載のバックライトユニット。
- 前記波長変換層が、前記第1光を第5波長の第2光に変換する第3波長変換粒子をさらに含む、請求項1に記載のバックライトユニット。
- 前記第1波長変換粒子が前記第2光を前記第2波長の光に変換し、前記第2波長変換粒子が前記第2光を前記第3波長の光に変換する、請求項4に記載のバックライトユニット。
- 前記散乱粒子の含有量が5%未満である、請求項1に記載のバックライトユニット。
- 波長400nmの光に対する前記散乱粒子の反射率が80%以上である、請求項7に記載のバックライトユニット。
- 前記導光板がガラスを含む、請求項1に記載のバックライトユニット。
- 導光板と、前記導光板上に配置され、TiO2アナターゼ結晶形の散乱粒子として粒子サイズ200nm以下の散乱粒子を含む波長変換層とを含む光学部材;
前記導光板の一側に配置された光源を含むバックライトユニット;及び
前記バックライトユニットの上部に配置された表示パネル;を含み、
前記光源は、第1波長の第1光を前記導光板に提供し、前記波長変換層は、前記第1光を第2波長の光に変換する第1波長変換粒子、および前記第1光を第3波長の光に変換する第2波長変換粒子を含み、
前記光源は第1波長と異なる第5波長の第2光を前記導光板に提供し、前記第1波長変換粒子は前記第2光を前記第2波長の光に変換し、前記第2波長変換粒子は前記第2光を前記第3波長の光に変換し、
前記第1波長および前記第5波長が青色光または近紫外線の波長範囲内にあり、
前記第1波長が320nm乃至420nmであり、前記第5波長が420nm乃至470nmであり、
前記第2波長が緑色光の波長範囲内にあり、前記第3波長が赤色光の波長範囲内にあり、
前記光学部材は前記導光板と前記波長変換層との間に配置された低屈折層をさらに含み、前記導光板、前記低屈折層および前記波長変換層は互いに結合して一体化されており、
前記波長変換層および前記低屈折層を覆うパッシベーション層をさらに含み、
前記波長変換層は、前記低屈折層よりも厚く、厚さが10~50μmであり、
前記波長変換層の側面は前記低屈折層の側面に整列され、前記パッシベーション層は、前記低屈折層が露出する前記導光板の縁部の上面にまで延びて、縁部の一部が前記導光板の上面に直接接しており、
前記波長変換層の側面は、前記低屈折層の側面より緩やかな傾斜角を持つ、表示装置。 - 前記第1波長変換粒子及び前記第2波長変換粒子が、それぞれ、カドミウム(Cd)化合物、及び、インジウム(In)化合物を含む請求項10に記載の表示装置。
- 第1波長の第1光を第2波長の光に変換する第1波長変換粒子と、
前記第1光を第3波長の光に変換する第2波長変換粒子と、
アナターゼ結晶形のTiO2を含む散乱粒子であって粒子サイズが200nm以下の散乱粒子を含む波長変換層とを含み、
前記波長変換層は、光源から提供される、第1波長の第1光を第2波長の光に変換する第1波長変換粒子、および前記第1光を第3波長の光に変換する第2波長変換粒子を含み、
前記第1波長変換粒子は、光源から提供される、第1波長と異なる第5波長の第2光を前記第2波長の光に変換し、前記第2波長変換粒子は前記第2光を前記第3波長の光に変換し、
前記第1波長および前記第5波長が青色光または近紫外線の波長範囲内にあり、
前記第1波長が320nm乃至420nmであり、前記第5波長が420nm乃至470nmであり、
前記第2波長が緑色光の波長範囲内にあり、前記第3波長が赤色光の波長範囲内にあり、
導光板と前記波長変換層との間に配置される低屈折層をさらに含み、前記導光板、前記低屈折層および前記波長変換層は互いに結合して一体化されるのであり、
前記波長変換層および前記低屈折層を覆うパッシベーション層をさらに含み、
前記波長変換層は、前記低屈折層よりも厚く、厚さが10~50μmであり、
前記波長変換層の側面は前記低屈折層の側面に整列され、前記パッシベーション層は、前記低屈折層が露出する前記導光板の縁部の上面にまで延びて、縁部の一部が前記導光板の上面に直接接しており、
前記波長変換層の側面は、前記低屈折層の側面より緩やかな傾斜角を持つ、光学部材。 - 前記導光板がガラスを含む、請求項12に記載の光学部材。
- 前記第1波長変換粒子及び前記第2波長変換粒子が、それぞれ、カドミウム(Cd)化合物、及び、インジウム(In)化合物を含む請求項12に記載の光学部材。
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