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TW574512B - Electrophoretic display device - Google Patents

Electrophoretic display device Download PDF

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Publication number
TW574512B
TW574512B TW90128339A TW90128339A TW574512B TW 574512 B TW574512 B TW 574512B TW 90128339 A TW90128339 A TW 90128339A TW 90128339 A TW90128339 A TW 90128339A TW 574512 B TW574512 B TW 574512B
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Taiwan
Prior art keywords
electrode
item
display device
electrophoretic display
electrodes
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Application number
TW90128339A
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English (en)
Inventor
Mark Thomas Johnson
Boer Dirk Kornelis Gerhardu De
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Koninkl Philips Electronics Nv
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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 
    • G02F1/165—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 translational movement of particles in a fluid under the influence of an applied field
    • G02F1/166—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 translational movement of particles in a fluid under the influence of an applied field characterised by the electro-optical or magneto-optical effect
    • G02F1/167—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 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
    • 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 
    • G02F1/165—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 translational movement of particles in a fluid under the influence of an applied field
    • G02F1/1675—Constructional details
    • G02F1/16757—Microcapsules
    • 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
    • G09G3/3433—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 light modulating elements actuated by an electric field and being other than liquid crystal devices and electrochromic devices
    • G09G3/344—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 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
    • 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 
    • G02F1/165—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 translational movement of particles in a fluid under the influence of an applied field
    • G02F1/1675—Constructional details
    • G02F1/1676—Electrodes
    • G02F1/16762—Electrodes having three or more electrodes per pixel
    • 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 
    • G02F1/165—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 translational movement of particles in a fluid under the influence of an applied field
    • G02F1/1675—Constructional details
    • G02F1/1676—Electrodes
    • G02F1/16766—Electrodes for active matrices
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2300/00—Aspects of the constitution of display devices
    • G09G2300/08—Active matrix structure, i.e. with use of active elements, inclusive of non-linear two terminal elements, in the pixels together with light emitting or modulating elements
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00—Command of the display device
    • G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
    • G09G2310/0202—Addressing of scan or signal lines
    • G09G2310/0205—Simultaneous scanning of several lines in flat panels
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00—Command of the display device
    • G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
    • G09G2310/0264—Details of driving circuits
    • G09G2310/0275—Details of drivers for data electrodes, other than drivers for liquid crystal, plasma or OLED displays, not related to handling digital grey scale data or to communication of data to the pixels by means of a current
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00—Command of the display device
    • G09G2310/06—Details of flat display driving waveforms
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00—Command of the display device
    • G09G2310/06—Details of flat display driving waveforms
    • G09G2310/061—Details of flat display driving waveforms for resetting or blanking
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00—Command of the display device
    • G09G2310/06—Details of flat display driving waveforms
    • G09G2310/068—Application of pulses of alternating polarity prior to the drive pulse in electrophoretic displays
    • 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
    • G09G2320/04—Maintaining the quality of display appearance
    • 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
    • G09G3/2007—Display of intermediate tones
    • G09G3/2014—Display of intermediate tones by modulation of the duration of a single pulse during which the logic level remains constant
    • 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
    • G09G3/3433—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 light modulating elements actuated by an electric field and being other than liquid crystal devices and electrochromic devices
    • G09G3/344—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 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
    • G09G3/3446—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 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 with more than two electrodes controlling the modulating element

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Electrochemistry (AREA)
  • Molecular Biology (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Computer Hardware Design (AREA)
  • Theoretical Computer Science (AREA)
  • Electrochromic Elements, Electrophoresis, Or Variable Reflection Or Absorption Elements (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Measuring Pulse, Heart Rate, Blood Pressure Or Blood Flow (AREA)

Description

1 五、發明説明（ 本發明係關於一種電泳顯示 :::介物的像素，和兩個切換電極，二= 構件可引起不同的光學狀態。若有必要， m!述之切換電極處將其分成許多次電極 電:電極係由外部或經由切換元件而供有—個相同的 狀置係基於兩具有不同傳輪性或反射性之極端 狀：之間的電場所影響之帶電性，通常屬彩色粒子之動作 c顯示裝置，可將深色(彩色)字元映射至淺色(彩 色）月厅、上，反之亦然。 電泳顯示裝置因而明顯地用於取代紙張功能之顯示裝置 稱為白皮書應用（電子報、電子日諸）。 在此等於兩㈣電極之間具有_電泳媒介物之已知電泳 顯不裝置中，切換電極供有驅動電壓。可接著將像素排外 地引領至兩—極端光學狀態。然後在-顯示元件上方將此等 切換電極其中之一舉例性地予以實現成兩相互互連的窄導 電條。於一跨越關於覆蓋整個顯示元件底部表面之切換電 極之正電壓’帶電粒子（此例中為帶負電性）移至電位面，該 電位面係由兩互連之窄導體條所界定。此（負）帶電粒子分佈 於顯不兀件（像素）的前端面，接著呈現帶電粒子的顏色。於 一杈跨關於底部電極之切換電極之負電壓，（負）帶電粒子分 佈於底部面而使得顯示元件（像素）呈現液晶的顏色。 實際上，對於顯示中繼性光學狀態（稱作灰值）有持續增 加的需求。引介灰值的已知方法通常無法令人滿意。例如 本紙張尺度適财S S家標準格(21〇X297公釐) -4 - 574512
，電泳顯示裝置的速度太慢以致無法經由時間加權驅動週 期（時間比率灰色刻度）引介灰值。將像素分割成不同表面（ 面積比率灰色刻度）通常需要不同次像素之間的阻障物以避 免交互干擾。 本發明一目的在於應付此項缺點。在根據本發明之電泳 顯示裝置中，灰值（中繼性光學狀態）係藉由提供具有至少其 匕電極之像素及用於供給其它具有電壓之電極之驅動構件 予以引介。 本發明係基於顯示單元内部之電場會其它電極上之電壓 予以衫響的認知，在上述實施例中，此項認知使得橫跨關 於底部電極之切換電極之正電壓處的電場受到干擾，此干 擾使得帶負電粒子移向兩電極之間表面的一部分。取決於 橫跨此等切換電極之電壓及一個（或多個）其它電極，或多或 少有些粒子移向兩電極之間的表面並得到不同之中繼光學 狀態（灰值）一。 為了在此等設定改變時於橫跨這兩個電極之表面得到令 人滿意的分佈，最好事先使此等帶電粒子均勻地分佈於又 電極，其方式係舉例性地將像素橋接至先於選擇之已界 定狀態，此乃舉例性地藉由給定一重置脈衝予以達成，若 有必要會配合小的交流場成分。 在一第一具體實施例中，電泳媒介物係呈現於兩基底 之間’其中每一個基底具有一個切換電極，而至少有一 個基底具有另一個電極。接著於一介於此等基底之間的 液體中出現帶電粒子，但電泳媒介物或許有可能呈現於 Γ紙張尺度適财—雜準(CNS) Μ規格(21GX 297公Θ ~ - 574512 A7 B7
一微囊中。在首述實例中，此等像素可藉由一阻障物予 以相互隔開。 在又一具體實施例中’電泳媒介物係呈現於兩基底之間 ，其中一基底包含此等切換電極及又一電極，尤其是在使 用SID 2000文摘“入面EPD之開發（Devel〇pment 〇f匕指ne EPD) 第24至27頁所述的橫向效應。 在較佳具體實施例中，此等切換電極為梳狀形及指叉形 ，部分（絕緣之）又一電極係置於兩切換電極之叉部之間。或 者’電泳媒介物可呈現於Proc· 20th IDRC會議之“稜鏡微 結構中基於全内部反射之新反射顯示器（New Reflective Display Based on Total Internal Reflection in Prismatic Microstructures)”第311至314頁（2000)所述之稜鏡結構中。 本發明之這些及其它觀點將引用之後述及的具體實施例 予以詳述而顯現。 圖示簡述： 圖1圖示一顯示裝置， 圖2表示一根據本發明之電泳顯示裝置的像素，其中已實 現不同的灰值（中繼光學狀態）， 圖3表示一根據本發明之電泳顯示裝置之像素中的電場變 化，用於闡明本發明， 圖4表示另一根據本發明之電泳顯示裝置，其中已實現不 同的灰值（中繼性光學狀態）， 圖5係另一根據本發明之電泳顯示裝置之一部分的平面 圖， 本紙張尺度適用中國國家標準(CNS) A4規格(210 X 297公釐) 574512
1 〇之其它圖像電極係以一個（或多個）共對立電極舉例性地連 接至接地。在圖1的實施例中，此一 TFT 9係僅圖示一像素 1 0 〇 在一根據本發明之顯示裝置中，每一假像素皆具有又一 電極及驅等構件用於供給電壓予又一電極。此乃示於圖2， 其表示此一具有一第三電極6 ’之像素的剖面圖。此驅動構 件舉例性地包含資料暫存器5(及可能一部分驅動器），以及 額外的行電極6 (和主動示驅動實例中的額外丁f 丁）。 一像素1〇(圖2)舉例性地包含一具有切換電極7之玻璃或 合成材料之第一基底11，以及一具有電極6之透明基底12。 此像素係舉例性地填滿一電泳媒介物、一在本實施例中含 有π正電黑色粒子14之白懸置物13。此像素另具有一第三 包極6 (以及在必要時如上所述具有未示於圖2之驅動構件） 以便經由橫跨第三電極的電壓實現中繼光學狀態。在此觀 點中，須注—意此第三電極6 ’亦影響兩極端狀態之間的切換 作用。如之後的進一步解釋，橫跨此電極的電壓亦影響兩 極端狀態。 例如，在圖2Α中，切換電極7係連接至接地，而兩電極6 6 ίτ、連接皂一電壓+V。此等黑色粒子i 4 (此實施例中為帶 正電）移向最低電位的電極’在實例中為電極7。由觀視方 向1 5觀視’像素現在具有液晶13的顏色（此實例中為白色）。 在圖2 B中，切換電極7係連接至接地，而兩電極6、6，係連 接至一電壓-V。帶正電，黑色粒子14移向最低電位，在此 實例中係移向平行於並恰好沿著基底12藉由電極6、6，所界 574512 五、發明説明（6 定的電位面。由觀視方向15觀視’像素現在具有黑色粒子 14的顏色。 .同樣地，在圖2C中，切換電極7係連接至錢地。此電極^ 再一次連接至一電壓-V。然而，與電極7類似，第三電極6, 現在，連接至接地。帶正電，黑色粒子14移向最低電位， 於此實例中係於-圍繞著電極6的區域。如圖2D所示，去第 三電極6,連接至一電壓+v時此甚至更為強烈。由觀視:向 15硯視’像素現在僅具部分具有黑色粒子14的顏色且部分 具有白色液體的顏色。從而取得一灰色色調（圖％之實例中 為深灰色且圖2D之實例中為淺灰色）。此將引用圖3予以解 釋，其中表示了六種橫跨電極6、6,、7之可能電壓組合之 電位線，且箭號16圖示施加在粒子14上之電力方向。 由於此等粒子舉例性地因液體_的移動而無法維持固定 在基底上，故提供一釘牢層。 限制液體移動的另一種可能性係使用如2〇thlDRC會議之 ‘‘用於電子報顯示器之微囊式電泳材料（Micr〇_encapsulated
Electrophoretic Materials f0r Eiectronic paper Displays)” 第 84至87 (2000)頁之微囊。電泳媒介物，含有帶正電粒子 之液體13，現在係呈現在一透明基底18中的微囊丨了内（看圖 4) 〇 在圖4A中，切換電極7係再一次連接至接地（〇v)，而電極 6、6’係再一次連接至一電壓+v。帶正電，黑色粒子14移向 最低電位的電極，在此實例中為電極7，亦即移向微囊丨7的 农低部位。由觀視方向1 5觀視，像素再一次具有液體丨3的 本紙張尺度適用中國國家標準(CNS) A4規格(210 X 297公釐) 裝 訂 574512
顏色。在圖4B中，切換電極7係連接至接地，而兩電極6、 6’係連接至一電壓-V。由觀視方向15觀視，像素現在具有 黑色粒子14的顏色。 同樣地在圖4C中，切換電極7係連接至接地。電極6係再 一次連接至一電壓-V。然而，如同電極7，第三電極6，現在 係連接至接地。帶正電，黑色粒子14移向最低電位，在此 實例中移向電極6且最後係大部分呈現在微囊17的上方部位 。由觀視方向15觀視，像素現在具有一深灰色。如圖扣所 示，當第三電極6’連接至一電壓+v時，粒子14最後係沿著 微囊17的邊緣呈現。像素現在具有一淺灰色。 在圖5之顯示裝置中，切換電極6、7和第三電極6，係呈現 在相同的基底11上，而第三電極係以一介電材料層丨8自此 等切換電極隔開。在此實施例中，切換電極6、7係呈梳狀 开> 及指叉形’且部分第三電極6 ’係置於此二切換電極之叉 部之間。梳狀形並非必要，一介於兩切換電極6、7之間的 橫向場亦合乎需求。示於圖6的剖面圖可接著同時描繪圖5 顯示裝置之像素之一部分及完整像素。如圖2和圖3之相同 描緣方式，可再一次引介各種具有已現不同灰值的電場結 構。為了防止混合屬於兩像素之粒子14，可提供壁面及阻 障物1 9。在使用許多顏色時，通常想要提供這些壁面或阻 障物（其中之一或完全沒有橫跨像素的全部高交）。 電泳媒介物亦可呈現於Proc. 20thIDRC會議之“稜鏡微結 構中基於全内部反射之新反射顯示器（New Reflective Display Based on Total Internal Reflection in Prismatic -10- 本紙張尺度適用中國國家標準(CNS) A4規格(210 x 297公釐） 574512 A7 B7 五、發明説明（8
Microstructures)”第3 11至3 14頁（2000)所述之稜鏡結構中。 此乃示於圖7和圖8。已知裝置包含一含有液體13之中空（例 如玻璃）三角狀反覆結構之稜鏡結構，其中液體13内含帶正 電粒子。取決於橫跨電極6、7的電壓，帶正電粒子係呈現 在IT0(上部）電極6或金屬之（底部）電極7上。在首述實例中 ，一入射光束經受玻璃介面上的全反射並反射（箭號a)。在 第二實例中，一入射光束係於玻璃液體介面上被吸收（箭號 b) 〇 藉由再一次引介一第三電極6，，可再一次引介各種具 有已現不同灰值的電場結構，如同圖2和圖4之實施例。 光吸收時，帶正電粒子14係用於液體13，結構8a、8B、 8C和8D則對應於白色、黑色、深灰色和淺灰色。藉由又 一電極6”並以不同電壓供予電極6，、6”，可實現中繼性灰 值（看圖8E )。 本發明當然不侷限於此等上述實施例。例如，得以在上 述實施例中得到四種可能的灰色色調。將證實可以變化的 電壓顯示許多灰色色調且可用類比方式實現全灰色刻度。 圖8之稜鏡結構亦可能有許多變形，例如屋頂狀、球狀或圓 柱狀結構，如圖9中實施例之剖面圖所圖示。或者，液體13 :填滿-含有白色二氧化鈦粒子丨4之黑色墨水。為了避色 ‘素之間的干擾’此等像素應儘可能地予以彼此電氣蔽護 k可藉由提供具有一非常高介電常數的壁面或導電壁面 予以實現。此等導電壁面可予以連接至電極7(接地）。 -或多種該等可能性的組合實際上是或可應用的。 X 297公釐） 本紙張尺度適财關綠 -11 -

Claims (1)

  1. :電冰顯不裝置’其包含至少—具有一電泳媒介物的 件將，傻Γ讀電極，以及驅動構件，可經由該驅動構 件將该像素引領至不同的光學狀態，其令該像素包含至 =-電極和驅動構件，用於經由電壓實現中繼性光學 狀恶。 2· ^請專利範圍第i項之電泳顯示裝置，其中該顯示裝置 …於將像素在選擇之前引領至—界定狀態的構件。 .如申凊專利範圍第1項之電泳顯示穿 褒置，其中該電泳媒介 物ίτ呈現於兩基底之間，每一個 ^個暴底皆包含一切換電極 ，、中至少有一基底具有另一電極。 4.如申凊專利範圍第1或2項之電泳顯干锭番甘 媒介物係呈現於一微囊中。』不裝置’其中該電泳 5·::請：利範圍第丨或3項之電泳顯示裝置，其中該等像 素係糟由一阻障物予以互相分隔。 6.如申請專利範圍第】項之電泳顯示裝置，其中該電泳媒介 物係呈現於兩基底之間’其中一基底包含此等切換電極 及另一電極。 7·如申請專利範圍第3項之電泳顯示裝置，其中該 極係呈梳指形及指叉形。 8. 如申請專㈣圍第6項之電泳顯示裝置，#中該等切 極係呈梳指形及指又形。 9. 如申請專利範圍第3項之電泳顯示裝置，其中該另一電極 係藉由一層介電材料與該等切換電極隔開。 10·如申請專利範圍第6項之電泳顯示裝置，其中該另_電極 -13-
    574512 、申請專利範圍 ":系：：-層介電材料與該等切換電極隔開。 •如申呀專利袍圍第9項之電泳顯 的加八a ”、貝不裝置，其中該另一電極 的。卩刀係置於兩切換電極之又部之間。 12·如申請專利範圍第〗項之電泳 3。 物係呈現於-稜鏡結構中Λ不裝置，其中該電泳媒介 13·如申請專利範圍第12 + 包冰顯不裝置，其中該稜鏡結 構係以兩切換電極鄰置於其基部 於該稜鏡結構的上部。 尾極係⑷置 -14- 本紙張尺度適用中國國家標準(CNS) A4規格(210X297公釐）
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EP1370904A2 (en) 2003-12-17
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US20040036951A1 (en) 2004-02-26
DE60212945D1 (de) 2006-08-17
US7439948B2 (en) 2008-10-21
WO2002073304A2 (en) 2002-09-19
CN100409095C (zh) 2008-08-06
ATE332516T1 (de) 2006-07-15
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JP4260482B2 (ja) 2009-04-30
JP2004519727A (ja) 2004-07-02

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