TWI518435B - 反射式顯示裝置 - Google Patents

反射式顯示裝置 Download PDF

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TWI518435B
TWI518435B TW103143038A TW103143038A TWI518435B TW I518435 B TWI518435 B TW I518435B TW 103143038 A TW103143038 A TW 103143038A TW 103143038 A TW103143038 A TW 103143038A TW I518435 B TWI518435 B TW I518435B
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light
display device
electrophoretic display
reflective display
films
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TW201621440A (zh
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任欣豪
李穎銘
曾耀霆
官靜璇
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元太科技工業股份有限公司
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Priority to TW103143038A priority Critical patent/TWI518435B/zh
Priority to US14/660,951 priority patent/US20160170280A1/en
Priority to CN201510121086.8A priority patent/CN105954955A/zh
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Publication of TWI518435B publication Critical patent/TWI518435B/zh
Publication of TW201621440A publication Critical patent/TW201621440A/zh
Priority to US15/636,664 priority patent/US10185075B2/en

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    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011Light 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
    • G02B6/0033Means for improving the coupling-out of light from the light guide
    • G02B6/005Means 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
    • G02B6/0053Prismatic sheet or layer; Brightness enhancement element, sheet or layer
    • GPHYSICS
    • G02OPTICS
    • G02FOPTICAL 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
    • G02F1/00Devices 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
    • G02F1/01Devices 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 
    • G02F1/13Devices 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
    • G02F1/133Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333Constructional arrangements; Manufacturing methods
    • G02F1/1335Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336Illuminating devices
    • GPHYSICS
    • G02OPTICS
    • G02FOPTICAL 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
    • G02F1/00Devices 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
    • G02F1/01Devices 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 
    • G02F1/165Devices 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 translational movement of particles in a fluid under the influence of an applied field
    • G02F1/166Devices 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 translational movement of particles in a fluid under the influence of an applied field characterised by the electro-optical or magneto-optical effect
    • G02F1/167Devices 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 translational movement of particles in a fluid under the influence of an applied field characterised by the electro-optical or magneto-optical effect by electrophoresis
    • GPHYSICS
    • G02OPTICS
    • G02FOPTICAL 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
    • G02F1/00Devices 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
    • G02F1/01Devices 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 
    • G02F1/165Devices 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 translational movement of particles in a fluid under the influence of an applied field
    • G02F1/1675Constructional details
    • G02F1/1677Structural association of cells with optical devices, e.g. reflectors or illuminating devices
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20Control 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
    • G09G3/34Control 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
    • G09G3/3406Control of illumination source
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20Control 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
    • G09G3/34Control 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
    • G09G3/3433Control 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 light modulating elements actuated by an electric field and being other than liquid crystal devices and electrochromic devices
    • G09G3/344Control 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 light modulating elements actuated by an electric field and being other than liquid crystal devices and electrochromic devices based on particles moving in a fluid or in a gas, e.g. electrophoretic devices
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011Light 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
    • G02B6/0033Means for improving the coupling-out of light from the light guide
    • G02B6/005Means 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
    • GPHYSICS
    • G02OPTICS
    • G02FOPTICAL 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
    • G02F1/00Devices 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
    • G02F1/01Devices 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 
    • G02F1/13Devices 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
    • G02F1/133Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333Constructional arrangements; Manufacturing methods
    • G02F1/1335Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336Illuminating devices
    • G02F1/133616Front illuminating devices

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Computer Hardware Design (AREA)
  • Theoretical Computer Science (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Molecular Biology (AREA)
  • Mathematical Physics (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)
  • Electrochromic Elements, Electrophoresis, Or Variable Reflection Or Absorption Elements (AREA)

Description

反射式顯示裝置
本發明係關於一種顯示技術,且特別係關於一種反射式顯示裝置。
目前的電子書或電子紙主要係採用反射式顯示裝置來顯示畫面。由於反射式顯示裝置十分依賴外界光源,一旦進到外界光源較弱的環境中,反射式顯示裝置則無法清楚地顯示畫面。為了解決這樣的問題,部份製造者在反射式顯示裝置的顯示面板上方設置前光模組,以在外界光源不足時,提供顯示面板光線,以利使用者觀看畫面。
一般的前光模組可包含側光源及導光板。導光板係位於顯示面板上方,而側光源係位於導光板的側面,以朝導光板的側面將光線射入導光板中。導光板的上表面可將光線反射至顯示面板,而顯示面板可反射此光線,以允許使用者觀看畫面。
然而,由於前光模組所發出的部份光線係以高入射角的方式進入顯示面板的,故這些光線容易以高反射角的方式離該顯示面板,而可能無法進入使用者的眼睛,造成反射式顯示裝置的亮度下降。若要提升反射式顯示裝置的亮度,則必須提高側光源的亮度,因而消耗更多電能,而不利於節能。因此,如何兼顧反射式顯示裝置的亮度需求與節能需求實為目前反射式顯示技術的發展困境之一。
有鑑於此,本發明之一目的係在於兼顧反射式顯示裝置的亮度需求與節能需求,進一步地說,本發明可在不增加前光模組耗電量的情況下,提高反射式顯示裝置的亮度。
為了達到上述目的,依據本發明之一實施方式,一種反射式顯示裝置包含一電泳顯示器、一前光模組以及複數光線收斂膜。前光模組係用以提供一光線至電泳顯示器,使電泳顯示器反射此光線。光線收斂膜係用以收斂被電泳顯示器反射之光線,最靠近電泳顯示器之光線收斂膜的折射率,小於最遠離電泳顯示器之光線收斂膜的折射率。
於本發明之一或多個實施方式中,此些光線收斂膜的折射率係沿著遠離電泳顯示器的方向增加的。
於本發明之一或多個實施方式中,此些光線收斂膜係層疊於電泳顯示器之上方。
於本發明之一或多個實施方式中,光線收斂膜比前光模組更遠離電泳顯示器。
於本發明之一或多個實施方式中,至少部份之前光模組係位於光線收斂膜與電泳顯示器之間。
於本發明之一或多個實施方式中,每一光線收斂膜之厚度係介於25微米(um)至200微米之間。
於本發明之一或多個實施方式中,此些光線收斂膜為折射率互不相同的光學膠(Optically Clear Adhesive,OCA)。
於本發明之一或多個實施方式中,反射式顯示裝置還可包含一出光層。出光層係設置於最遠離電泳顯示器之光線收斂膜上,其中出光層具有一頂面,頂面係粗糙的。
於本發明之一或多個實施方式中,反射式顯示裝置還可包含一稜鏡片。稜鏡片比前光模組更遠離電泳顯示器,以收斂電泳顯示器所反射的光線。
於本發明之一或多個實施方式中,稜鏡片係位於光線收斂膜與前光模組之間。
於上述實施方式中,由於最靠近電泳顯示器之光線收斂膜的折射率,小於最遠離電泳顯示器之光線收斂膜的折射率,使得電泳顯示器所反射的光線可從光疏介質進入光密介質,而向內收斂。如此一來,即便電泳顯示器係以高反射角的方式反射光線,此光線亦可藉由光線收斂膜而向內收斂,故可有效穿出反射式顯示裝置外,進入使用者眼睛中,從而提高反射式顯示裝置的亮度。
此外,由於上述實施方式已利用光線收斂膜的折射率差異來提高亮度,故可無須增加前光模組的亮度,從而可 節省前光模組的耗電量,以兼顧反射式顯示裝置的亮度需求與節能需求。
以上所述僅係用以闡述本發明所欲解決的問題、解決問題的技術手段、及其產生的功效等等,本發明之具體細節將在下文的實施方式及相關圖式中詳細介紹。
100‧‧‧電泳顯示器
110‧‧‧微膠囊
112‧‧‧淺色帶電粒子
114‧‧‧深色帶電粒子
120‧‧‧透光基板
122‧‧‧共同電極
130‧‧‧透光基板
132‧‧‧驅動電極
200‧‧‧前光模組
210‧‧‧導光板
212‧‧‧底面
214‧‧‧頂面
216‧‧‧側面
220‧‧‧光源
300‧‧‧光學膜片組
310‧‧‧光線收斂膜
400‧‧‧出光層
410‧‧‧頂面
500‧‧‧稜鏡片
L‧‧‧光線
n1、n2、n3、nk-1、nk‧‧‧折射率
t‧‧‧厚度
為讓本發明之上述和其他目的、特徵、優點與實施例能更明顯易懂,所附圖式之說明如下:第1圖繪示依據本發明一實施方式之反射式顯示裝置的側視示意圖;第2圖繪示依據本發明一實施方式之反射式顯示裝置的光路圖;第3圖繪示依據本發明一實施方式之電泳顯示器的側視示意圖;第4圖繪示依據本發明另一實施方式之反射式顯示裝置的側視示意圖;第5圖繪示依據本發明另一實施方式之反射式顯示裝置的側視示意圖;以及第6圖繪示依據本發明另一實施方式之反射式顯示裝置的側視示意圖。
以下將以圖式揭露本發明之複數實施方式,為明確說明起見,許多實務上的細節將在以下敘述中一併說明。然而,熟悉本領域之技術人員應當瞭解到,在本發明部分實施方式中,這些實務上的細節並非必要的,因此不應用以限制本發明。此外,為簡化圖式起見,一些習知慣用的結構與元件在圖式中將以簡單示意的方式繪示之。
第1圖繪示依據本發明一實施方式之反射式顯示裝置的側視示意圖。如第1圖所示,反射式顯示裝置可包含電泳顯示器100、前光模組200以及光學膜片組300。前光模組200係設置於電泳顯示器100上,以朝向電泳顯示器100發出光線,而電泳顯示器100可將前光模組200所發出的光線,朝光學膜片組300反射。光學膜片組300可收斂電泳顯示器100所反射的光線,以提高反射式顯示裝置的亮度。
進一步來說,可參閱第2圖,本圖繪示依據本發明一實施方式之反射式顯示裝置的光路圖。如第2圖所示,前光模組200提供光線至電泳顯示器100,而電泳顯示器100反射的光線為光線L。光學膜片組300可包含複數光線收斂膜310。這些光線收斂膜310係位在電泳顯示器100上方,以收斂被電泳顯示器100反射之光線L。具體來說,最靠近電泳顯示器100的光線收斂膜310(亦即,圖中最下方的光線收斂膜310)具有折射率n1,而最遠離電泳顯示器100的光線收斂膜310(亦即,圖中最上方的光線收斂膜310)具有折射率nk,其中折射率n1係小於折射率nk。
因此,當電泳顯示器100所反射的光線L從最下方的光線收斂膜310行進至最上方的光線收斂膜310時,此光線L可從光疏介質(亦即,折射率較小的介質)進入光密介質(亦即,折射率較大的介質)。根據司乃耳定律(Snell’ Law),當光線L從光疏介質進入光密介質時,光線L的折射角會小於入射角,而向內收斂。如此一來,即便電泳顯示器100係以高反射角的方式反射光線L,此光線L亦可藉由不同光線收斂膜310的折射率差異而向內收斂,故可有效穿出反射式顯示裝置外,進入使用者眼睛中,從而提高反射式顯示裝置的亮度。
此外,由於上述實施方式已利用光線收斂膜310的折射率差異來提高亮度,故於部份實施方式中,可無須增加前光模組200的亮度,從而可節省前光模組200的耗電量,以兼顧反射式顯示裝置的亮度需求與節能需求。
於部份實施方式中,如第2圖所示,此些光線收斂膜310的折射率係沿著遠離電泳顯示器100的方向增加的。進一步來說,在第2圖中,由下往上排列的多個光線收斂膜310分別具有折射率n1,n2,n3,......,nk-1及nk,且n1<n2<n3<......<nk-1<nk。藉由折射率的差異,電泳顯示器100所反射的光線L在行經任兩相鄰之光線收斂膜310的交界時,會基於上述司乃耳定律,而向內收斂。如此一來,當電泳顯示器100所反射的光線L由下往上地依序通過不同光線收斂膜310時,此光線L的行進方向在每個光線收斂膜310之交界均會向內偏移,而逐漸向內收斂,以提高反射式顯示裝置的亮度。
於部份實施方式中,如第2圖所示,此些光線收斂膜310係層疊於電泳顯示器100之上方。換句話說,任兩相鄰之光線收斂膜310係不分離的,如此可利於任兩相鄰之光線收斂膜310相接觸而形成交界,使得電泳顯示器100所反射的光線L行經此交界時,能夠向內收斂。
於部份實施方式中,如第2圖所示,每一光線收斂膜310具有厚度t,此厚度t係介於25微米至200微米之間。在此厚度範圍內的光線收斂膜310可更有效地將光線L向內收斂。於部份實施方式中,此些光線收斂膜310為折射率互不相同的光學膠(Optically Clear Adhesive,OCA),而這些光學膠的折射率差異可藉由調整其材料成分來實現。
於部份實施方式中,如第2圖所示,此些光線收斂膜310係比前光模組200更遠離電泳顯示器100。換句話說,至少部份之前光模組200係位於此些光線收斂膜310與電泳顯示器100之間。如此一來,前光模組200朝向電泳顯示器100所發出的光線可直接進入電泳顯示器100中,而不會先通過光線收斂膜310後,再進入電泳顯示器100中,故可防止前光模組200所發出的光線被光線收斂膜310所收斂而導致僅局部的電泳顯示器100接收到光線,換句話說,上述設計可利於電泳顯示器100均勻地接收來自前光模組200的光線。
於部份實施方式中,如第2圖所示,前光模組200可包含導光板210以及光源220。導光板210係位於電泳顯示器100與光學膜片組300之間,且光源220係位於導光板210旁。進一步來說,導光板210可包含底面212、頂面214以及側面 216。底面212與頂面214係相對的,且於部份實施方式中,底面212與頂面214可實質上平行。側面216鄰接底面212及頂面214,且於部份實施方式中,側面216可實質上垂直於底面212及頂面214。光源220係設置於導光板210的側面216,電泳顯示器100係設置於導光板210的底面212,而光學膜片組300係設置於導光板210的頂面214。
在使用時,光源220可朝導光板210的側面216發出光線,而使光線通過側面216進入導光板210中,並由底面212進入電泳顯示器100中。電泳顯示器100可將光線反射,而被反射的光線L可通過底面212進入導光板210中,並由頂面214離開導光板210,而進入光學膜片組300中。故藉由上述設計,光源220所發出的光線可直接進入電泳顯示器100中,而不會先通過光線收斂膜310後,再進入電泳顯示器100中。因此,上述設計可防止光源220朝電泳顯示器100發出的光線被收斂,而利於電泳顯示器100均勻地接收來自光源220的光線。
第3圖繪示依據本發明一實施方式之電泳顯示器100的側視示意圖。如第3圖所示,於部份實施方式中,電泳顯示器100可包含複數微膠囊110及透光基板120與130。此些微膠囊110係夾設於透光基板120與130之間。透光基板120具有共同電極122。透光基板130具有複數驅動電極132。微膠囊110具有淺色帶電粒子112及深色帶電粒子114。淺色帶電粒子112的電性與深色帶電粒子114的電性相異。舉例來說,淺色帶電粒子112可帶負電,而深色帶電粒子114可帶正電。共同 電極122與驅動電極132可影響淺色帶電粒子112與深色帶電粒子114的位置。
具體來說,當驅動電極132的電性改變時,淺色帶電粒子112或深色帶電粒子114會根據驅動電極132的電性,而向上或向下移動。當光線L(可參閱第2圖)通過透光基板120後,係遭遇到淺色帶電粒子112時,其可被淺色帶電粒子112所反射;相對地,當光線L通過透光基板120後,係遭遇到深色帶電粒子114時,其可被深色帶電粒子114所吸收。如此一來,使用者可觀賞到黑白畫面。於部份實施方式中,電泳顯示器100亦可選擇性地包含彩色濾光片(未示於圖中),以利形成彩色畫面。
第4圖繪示依據本發明另一實施方式之反射式顯示裝置的側視示意圖。如第4圖所示,本實施方式與第2圖所示實施方式之間的主要差異係在於:反射式顯示裝置還可包含出光層400。出光層400係設置於最遠離電泳顯示器100的光線收斂膜310(亦即,圖中最上方的光線收斂膜310)上。出光層400具有頂面410,頂面410係粗糙的,而呈凹凸起伏狀。如此一來,當電泳顯示器100所反射的光線L(可參閱第2圖)行經至頂面410時,粗糙的頂面410可防止光線L的全反射,使光線L能夠順利行進至頂面410外,以利出光,從而更進一步地提高反射式顯示裝置的亮度。
第5圖繪示依據本發明另一實施方式之反射式顯示裝置的側視示意圖。如第5圖所示,本實施方式與第2圖所示實施方式之間的主要差異係在於:反射式顯示裝置還可包含稜 鏡片500。稜鏡片500比前光模組200更遠離電泳顯示器100,用以收斂電泳顯示器100所反射的光線L(可參閱第2圖)。換句話說,本實施方式除了可利用多個光線收斂膜310來收斂光線L外,還可利用稜鏡片500來收斂光線L,以更進一步地提高光線L收斂的角度,而更進一步地提升反射式顯示裝置的亮度。
舉例來說,稜鏡片500可位於前光模組200與光線收斂膜310之間。具體來說,稜鏡片500可設置於導光板210的頂面214上,而光學膜片組300可設置於稜鏡片500上。由於稜鏡片500係位於導光板210的頂面214上,而電泳顯示器100係設置於導光板210的底面212,故光源220朝電泳顯示器100所發出的光線(可參閱第2圖)可直接進入電泳顯示器100中,而不會先通過稜鏡片500後,再進入電泳顯示器100中。因此,上述設計可防止光源220朝電泳顯示器100發出的光線被稜鏡片500收斂,而利於電泳顯示器100均勻地接收來自光源220的光線L。
第6圖繪示依據本發明另一實施方式之反射式顯示裝置的側視示意圖。如第6圖所示,本實施方式與第2圖所示實施方式之間的主要差異係在於:反射式顯示裝置可包含出光層400與稜鏡片500。出光層400係設置於最遠離電泳顯示器100的光線收斂膜310(亦即,圖中最上方的光線收斂膜310)上,以利出光。稜鏡片500係設置於最靠近電泳顯示器100的光線收斂膜310(亦即,圖中最下方的光線收斂膜310)與導光板210之間,以提高光線收斂的效果。藉由出光層400與稜鏡片 500的採用,本實施方式的反射式顯示裝置可更進一步地提高反射式顯示裝置的亮度。
雖然本發明已以實施方式揭露如上,然其並非用以限定本發明,任何熟習此技藝者,在不脫離本發明之精神和範圍內,當可作各種之更動與潤飾,因此本發明之保護範圍當視後附之申請專利範圍所界定者為準。
100‧‧‧電泳顯示器
200‧‧‧前光模組
210‧‧‧導光板
220‧‧‧光源
300‧‧‧光學膜片組

Claims (10)

  1. 一種反射式顯示裝置,包含:一電泳顯示器;一前光模組,用以提供一光線至該電泳顯示器,使該電泳顯示器反射該光線;以及複數光線收斂膜,用以收斂被該電泳顯示器反射之該光線,該些光線收斂膜之最靠近該電泳顯示器之一者的折射率,小於該些光線收斂膜之最遠離該電泳顯示器之一者的折射率。
  2. 如請求項1所述之反射式顯示裝置,其中該些光線收斂膜的折射率係沿著遠離該電泳顯示器的方向增加。
  3. 如請求項1所述之反射式顯示裝置,其中該些光線收斂膜係層疊於該電泳顯示器之上方。
  4. 如請求項1所述之反射式顯示裝置,其中該些光線收斂膜比該前光模組更遠離該電泳顯示器。
  5. 如請求項1所述之反射式顯示裝置,其中至少部份之該前光模組係位於該些光線收斂膜與該電泳顯示器之間。
  6. 如請求項1所述之反射式顯示裝置,其中每一該些光線收斂膜之厚度係介於25微米至200微米之間。
  7. 如請求項1所述之反射式顯示裝置,其中該些光線收斂膜為折射率互不相同的光學膠(Optically Clear Adhesive,OCA)。
  8. 如請求項1所述之反射式顯示裝置,更包含:一出光層,設置於該些光線收斂膜之最遠離該電泳顯示器之該者上,其中該出光層具有一頂面,該頂面係粗糙的。
  9. 如請求項1所述之反射式顯示裝置,更包含:一稜鏡片,該稜鏡片比該前光模組更遠離該電泳顯示器,以收斂該電泳顯示器所反射的該光線。
  10. 如請求項9所述之反射式顯示裝置,其中該稜鏡片係位於該些光線收斂膜與該前光模組之間。
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