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TWI342006B - Amole panel - Google Patents

Amole panel Download PDF

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Publication number
TWI342006B
TWI342006B TW095116424A TW95116424A TWI342006B TW I342006 B TWI342006 B TW I342006B TW 095116424 A TW095116424 A TW 095116424A TW 95116424 A TW95116424 A TW 95116424A TW I342006 B TWI342006 B TW I342006B
Authority
TW
Taiwan
Prior art keywords
active matrix
switching element
organic light
emitting diode
current
Prior art date
Application number
TW095116424A
Other languages
English (en)
Other versions
TW200743087A (en
Inventor
Jiunn Yau Huang
Cheng Chi Yen
Original Assignee
Himax Tech Inc
Himax Display Inc
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 Himax Tech Inc, Himax Display Inc filed Critical Himax Tech Inc
Priority to TW095116424A priority Critical patent/TWI342006B/zh
Priority to US11/798,014 priority patent/US8040304B2/en
Publication of TW200743087A publication Critical patent/TW200743087A/zh
Application granted granted Critical
Publication of TWI342006B publication Critical patent/TWI342006B/zh

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Classifications

    • 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
    • G09G3/22—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 using controlled light sources
    • G09G3/30—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 using controlled light sources using electroluminescent panels
    • G09G3/32—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 using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G09G3/3208—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 using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
    • G09G3/3225—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 using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix
    • G09G3/3233—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 using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix with pixel circuitry controlling the current through the light-emitting element
    • G09G3/3241—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 using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix with pixel circuitry controlling the current through the light-emitting element the current through the light-emitting element being set using a data current provided by the data driver, e.g. by using a two-transistor current mirror
    • 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
    • G09G3/22—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 using controlled light sources
    • G09G3/30—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 using controlled light sources using electroluminescent panels
    • G09G3/32—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 using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G09G3/3208—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 using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
    • G09G3/3275—Details of drivers for data electrodes
    • G09G3/3283—Details of drivers for data electrodes in which the data driver supplies a variable data current for setting the current through, or the voltage across, the light-emitting 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
    • G09G2300/00—Aspects of the constitution of display devices
    • G09G2300/04—Structural and physical details of display devices
    • G09G2300/0439—Pixel structures
    • G09G2300/0465—Improved aperture ratio, e.g. by size reduction of the pixel circuit, e.g. for improving the pixel density or the maximum displayable luminance or brightness
    • 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
    • G09G2300/0809—Several active elements per pixel in active matrix panels
    • G09G2300/0842—Several active elements per pixel in active matrix panels forming a memory circuit, e.g. a dynamic memory with one capacitor

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Control Of El Displays (AREA)
  • Electroluminescent Light Sources (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Mechanical Optical Scanning Systems (AREA)
  • Mechanical Light Control Or Optical Switches (AREA)

Description

1342006
三達編: TW2769PA 九、發明說明： 【發明所屬之技術領域】 板 光二極體面板。 “驅動之主動矩陣式有機發 【先前技術】 -般來說，於-主動矩陣式有
MatnX〇LED，_LED)顯示^中，将们 4 f UCtlVe 恭t--炻锕·Τ 4c丨 係耗由主動矩陣式有機 :掳―：“/7之大量晝素來顯示所欲呈現之影像，且 主動矩陣式有機發光面板令之每 一们至素，使其分別呈現所需之亮度。 請參照第1圖，t給—？ 7W击^ 口 >、、..《小乃傳統主動矩陣式 極體面板之電路圖。於主動矩陣 Μ ; Λ序階段’掃描驅動單元14輸出之掃描訊 破Sea時通主動矩陣式有機發光二極體畫素單元η令之 電晶體Τ1以及電晶㈣-欠L| 電流IDatai=m：^動單元12所具有之 干 會產生電流IData。而由於電晶 日體T4形成—電流鏡結構之電路，因此電晶 體Τ4會產生與電流IData成比例關係 電流I0LED輪出至發光二極體16 1將 诗 ^ ^ 便其發出相對應之亮 同：’電谷C亦會被充電至—相對應之電愿準位。 體τι以及〜，員不日寸序F“又’知描訊號Scan截止電晶 體T i以及心曰體τ 2 ’故電晶體τ 4與資料驅動單元i 2電 7
〜達編號：TW2769PA 性隔離’電晶體Τ4之源閘極間 地維持於相對應之雷茂淮/門电壓差會错由電容C穩定 持於-定值二而f二二電流_D因此亦穩定地維 電流細之;小有謂驅動單元12所能驅動之 資料驅動單元12之面^ =驅動更大之電流’將須加大 . 之面積，如此一來，將導致成本上升。 【發明内容】 =於此’本發明的目的就是在提供—種主動矩陣式 之:^極體面板’利用多個鏡射輸出電路，提伊更1 ⑽以驅動主動矩陣式有機發光二極體面板書素。 板據本發明的目的，提出—種主動矩陣式有機二 面板，包括主動矩陣式有機發光二極體ί夺^;： ^ ^ ^ A f ^ ^ fy； ,, 〇 # ^ ^ ^ 矩陣式有機發光二極體書素單二-主動 動矩陣式有機發光二極體金：；元=— 單元包括夫，"、/β 及電廢源’資料驅動 叫N為正整數。參考電流源電路 N+1個鏡射輸出電路_至參考電流源電路 1應之N+1個資料電流至主動車 ， 其中，此N+1個資料電流中之第m個資料電流 糸為參考電流之2m倍，m為〇至k整數。…個 件係相對應於N+1個鏡射輸出電路，用以控制n+ = 料電流是否輸出至主動矩陣式有機發光二極體畫素單元:、 為讓本發明之上述目的、特徵、和優點能更明^ 8 1342006
i達編號：TW2769PA 懂 ，下文知·舉一較佳實施例，並配合所附 明如下： 圖式，作詳細說 【實施方式】 本發明係利用N+ 1個鏡射輸出電路，以 動畫素。請參照第2圖，其繪-乃依照:發‘ ^只域之主動矩陣式有機發光二極體畫素驅動電路之. 功旎方塊圖。於主動矩陣式有機發光二極 20中，係由資料驅動單元22以及掃描 ^ = ::選擇之行列，以驅動相對應之主動矩陣式有= 動矩= =實― 發光-朽-m ®。主動矩陣式有機 金伫=面板聲包括主動矩陣式有機發光二極體 二早7031、貧料驅動單元32以及掃描，驅動單元私 式有機發光二極體晝素單元31包括主動 枝發光二極體3 β、筮__ μ -,, 千飞’ 第：1 件MP1、第二開關元特2、 =j l件·第四開關元件MP4以及儲能元件c， 晶：：=侧〜第四開關元細例如她電 ""儲也元件c例如為電容。 為接極體職至電㈣，例如 單元-，：二:動第^ 第— 两伐芏娜拖驅動早兀34。電晶體MP2之 而麵接至電晶體MP1之第二端，控制端麵接至掃描驅 9 1342006
三達編號：TW2769PA 動單元34。電晶體MP3之第一端麵接至電晶體肝2之第一 墙’第二端_至第—電壓，例如為I作電壓VDD，控制 端_電晶體之第二端。電晶體MP4之第一端減 至主動矩陣式有機發光二極體36，第二端柄接至工作電壓 帅丨），控制端耦接至電晶體MP3之控制端。電容c之第一 端辆接.至電晶議之控制端，第二端耦接至t晶體MP4
两八 〇r& c .........一"干几別w出之掃描訊
Ucan導通電晶體MP1以及電晶體Mp2，藉 元32所具有之電流IData，t晶體Mp3亦會產生電流〇 1 Data。而由於電晶體MP3以及電晶體Mp4形成―電流鏡 =構之電路，因此電晶體，會產生與電流伽如成比例 W係之電流I0LED，且將電流H)LE1)輸出至發光二極體 16，使其發出相對應之亮度，㈣，電容c亦會被充 —相對應之電壓準位。 — 然後，於一顯示時序階段，掃描訊號义如截止電晶 體MP1以及電晶體MP2，故電晶體Mp4與資料驅動單元^ 紐隔離’電㈣MP4之__ 差會藉由電容 疋地維持於相對應之電壓準位，電流丨聽因此亦 : 維持於一定值。"^ 上述之主動矩陣式有機發光二極體面板30中，資料 動單元32包括參考電流源電路310、叫個鏡射輪出 ♦电路320〜32η以及N+1個開關元件別〜如，其中，n為正 整數。參考電流源電路31〇用以提供參考電流！。鏡射輸 10
三達編號：TW2769PA 出私路ϋ20〜32η係輕接至參考電流源電路3i〇，故主動矩 陣式有機發光二極體晝素單^ 31可以從f料驅動單元犯 没取資料電流1〇如資料電流I(Mn係與參考電流U 有相對應之比例關係，例如資料電流lm(㈣之大小為 定電流I之大小之2"1倍。
開關几件SO〜Sn，係相對應於鏡射輸出電路 320 32η用以控制主動矩陣式有機發光二極體畫素單元 3J是否能汲取資料電流Ι(Μη。其中，開關元綠如配 置之位置可以改變。例如開關元件s 〇〜s η之第一端搞接至 美地4缺GND，第二端耦接至相對應之鏡射輸出電路 3以)〜32η。開關元件S0〜Sn亦可以配置於不同之位置，例 如，開關元件S0〜Sn之第一 端耦接至相對應之鏡射輸出電 路320〜32η，第二端係耦接至主動矩陣式有機發光二極體 畫素單元3]。 由於開關元件S0〜Sn之開啟或關閉可以控制主動矩 # 陣式有機發光二極體畫素單元31是否能汲取資料電流 10〜In而成為資料電流iData，亦即能控資料電流丨Bata 之-°舉例來說’當僅有開關元件so打開時，資料電 流IData之大小為最小，其值為Ϊ。當開關元件別〜如均 打開時，資料電流IData之大小為最大，其值為〇 + 2 + 4 +......+ 2η)Ι = (2Π+1_ 1)1。由上所述，主動矩陣式有機發 光·一極體面板晝素早元31能沒取（2n+1 — 1)種不同大小之 資料電流IData，是故主動矩陣式有機發光二極體面板3〇 即能以大電流推動主動矩陣式有機發光二極體3 6。 1342006
: TvV2769PA
-上述之主動矩陣式有機發光二極體面板3〇中，第一 開關元件〜第四開關元件亦可以為NM〇s電晶體。請參照第 4圖，其繪示乃依照本發明較佳實施例之主動矩陣式有機 發光二極體面板之另一例之電路圖。於主動矩陣式有機發 光一極面板40中，亀晶體MN1之第一端係耦接至資料 呢動單元32·，控制端耦接至掃描驅動單元44。電晶體MN2 之第:端耦接至電晶體MN1之第二端’控制端辆接至掃描 驅動卓το 44。電晶體MN3之第一端耦接至電晶體MN2之第 縞，弟二端耦接至接地電壓GND ,控制端耦接至電晶體 Mid之第二端。電晶體MN4之第--端耦接至主動矩陴式有 光·一極^ 4 6，第一端搞接至霄壓源，例如為接地電壓 GMD’控制端耦接至電晶·ΜΝ3之控制端。電容c之第一" 端耦接至電晶體MN4之控制端，第二端耦接至電晶體MN4 <第二端。此外，資料驅動單元42耦接至工作電壓VDD u 上述之主動矩陣式有機發光二極體面板，其運作 原理相同於主動矩陣式有機發光二極體面板3〇。 本發明上述實施例所揭露之主動矩陣式有機發光二 極體面板，係利用多個鏡射輸出電路，以提供更大之電流 以驅動主動矩陣式有機發光二極體晝素，同時，亦提供不 同之電流大小以驅動主動矩陣式有機發光二極體畫素。 综上所述，雖然本發明已以一較佳實施例揭露如上， 然其並非用以限定本發明。本發明所屬技術領域中具有通 常知識者，在不脫離本發明之精神和範圍内，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 12 i 丄342006
- 三達編號：TW2769PA 專利範圍所界定者為準。 【圖式簡單說明】 * 第1圖繪示傳統主動矩陣式有機發光二極體面板之 〇 2圖繪示依照本發明較佳實施例之主動矩陣式有 二極體面板之示意圖。 3圖繪不依照本發明較佳實施例之主動矩陣式有 二極體面板之電路圖。 4圖繪示依照本發明較佳實施例之主動矩陣式有 一極體面板之另一例之電路圖。 電路圖 . 第 機發光 • 第 機發光 第 機發光 【主要元件符號說明】 、20、30、40 :主動矩陣弍有機發光二極體面板 11、31、41 :主動矩陣式有機發光二極體畫素單元 _ 12、22、32、42 :資料驅動單元 14、24、34、44 :掃描驅動單元 16、36、46:主動矩陣式有機發光二極體 310、410 :參考電流源電路 320〜32η、420〜42η :鏡射輸出電路 S0〜Sn :開關元件 C :電容 T1〜T4、MP1〜MP4、MN1〜MM4 :雷 b ηλ 13

Claims (1)

1342006 TW2769PA L達靖號： 十、申請專利範圍： 1. -種主動矩陣式有機發光二極體面板，包括： 主動矩陣式有機發光二極體畫素單元； 極|*查2鶴早（，係祕至魅動鱗;切機發光二 μ體畫素早兀，以及 極驅^元’係柄接至該主動矩陣式有機發光二 …責二以及-電壓源，該資料驅動單元包括： -麥考電流源電路，係用以提供„參考電流； 兩 Ν + 1個㈣輪出電路’絲接至該參考電流源 用以輸出相對應之Ν.彳.丨個資料電流至該主動矩時 極嶋單元，Ν為正整數，且該…個資 〇广中之+ 料電流係為該參考電流之r倍，心 0至N之整數；以及 n】马 N+1個開關元件，係相對應於該N-H個鏡評 用以控制該N+1„料電流是否輸出至該 巨陣式有機發光二極體畫素單元。 如中請專利範圍第1項所述之主動矩陣式有機發 ==板，其中該嶋開關元件之第—端係= 至忒电壓源，該Ν+1個開關元件之第_ 應之該Ν+Η固鏡射輸出電路。#4_接至相對 3·如申請專利範圍第Μ所述之主動 ==其中該N+1個開關元件之第』= 至相對C之$ N+1個鏡射輸出電路，該Ν+ι 之第二端_接至該主動矩陣式有機發光二極體 14 1342006 三達編號：TW2769PA 元D 光丄=請Ϊ利範圍第1項所述之主動矩陣式有機發 先一極體面板，其中該主動矩陣式有機發光 。 元包括： 虹至京早 一 ί =式有機發光二極體，係輕接至該電壓源; 米一 Μ關兀件，該第一開關元件之一第一^ 至該資料驅動單元，該第^ 接 該掃描驅動單元；…關兀件I控制端係辆接至 一第二開關元件’該第二開關元件之一第 ㈣第-開關元件之—第二端，該第二開關元件：：：接 端係耦接至該掃描驅動單元； ” 也制 —第m該第三開關元件之—第— =第二開崎之該第-端，該第三開關元件：：= =糸輕接至-第—電壓，該第三開關元件之 ^ 接至該第二開關元件之—第二端； 上制缟係耦 —第四開關元件，該第四開關元件之一第— 主该主動矩陣式有機乂 而係耦接 搞接至該第 土心四開關讀之-控制端係 弟—開關辑之該控制端；以及 —儲能元件，該儲能元件之一 開關元件之哕丨胂 知係耦接至該第四 弟四開關元件之該第二端。 弟—鸲係耦接至該 5.如申請專利範圍第4 先二極體面板，其中該儲能元件為―電主容動矩陣式有機發 15 1342006 一.遠編號：TW2769PA 6. 如申請專利範圍第4項 光二極體面板，J:中·“ 矩陣式有機發 兮贷 弟開關兀件、該第二開H =二開關兀件以及該第四開關元件為刚 體、 电壓源輸出-接地電壓，該第-電塵為一工作？;體讀 7. 如中請專利範圍第4項所述之主動矩^' 先二極體面板，其中該第一開.關元件、該第；幾發 元件=第四輸件為_d 免昼源輸出一工作電壓，該第—電壓為-接地電壓。嗓 16
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