TWI376664B - Organic light emitting diode display and driving method thereof - Google Patents

Organic light emitting diode display and driving method thereof Download PDF

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Publication number
TWI376664B
TWI376664B TW096123879A TW96123879A TWI376664B TW I376664 B TWI376664 B TW I376664B TW 096123879 A TW096123879 A TW 096123879A TW 96123879 A TW96123879 A TW 96123879A TW I376664 B TWI376664 B TW I376664B
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voltage
organic light
emitting diode
data
update
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TW096123879A
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TW200816143A (en
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In Hwan Kim
Seung Chan Byun
Jin Hyoung Kim
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Lg Display Co Ltd
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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
    • G09G3/22—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
    • 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]
    • 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
    • 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]
    • 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
    • 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
    • G09G2310/0243—Details of the generation of driving signals
    • G09G2310/0245—Clearing or presetting the whole screen independently of waveforms, e.g. on power-on
    • 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
    • G09G2310/0243—Details of the generation of driving signals
    • G09G2310/0251—Precharge or discharge of pixel before applying new pixel voltage
    • 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
    • G09G2320/0219—Reducing feedthrough effects in active matrix panels, i.e. voltage changes on the scan electrode influencing the pixel voltage due to capacitive coupling
    • 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
    • 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
    • G09G2320/0257—Reduction of after-image effects
    • 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
    • G09G3/2092—Details of a display terminals using a flat panel, the details relating to the control arrangement of the display terminal and to the interfaces thereto
    • G09G3/2096—Details of the interface to the display terminal specific for a flat panel
    • 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
    • G09G3/3291—Details of drivers for data electrodes in which the data driver supplies a variable data voltage for setting the current through, or the voltage across, the light-emitting elements

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

Description

九、發明說明： 【發明所屬之技術領域】 本發明係有關於一有機發光_ 一種在目前下特別是 ，極之電厂堅的有機發.光二極體顯示器及其驅動方 【先前技術】 管之：：的!各種藉由降低重量與體積來減少陰極射線 哭…=顯示器裝置被發展出來。這些平面顯示 -衣置包含液晶顯示器（以 器（以下摇Α，，ΡΡη，,、 U )、％發射頦不 . )、電漿顯示（以下稱為” PDP，,）、以及 田-Μ光（以下稱為”EL”）等顯示器裝置。 由電面顯示器之中’EL顯示器裝置是-種藉 由電子與電洞的復合 光裝置。EL H里 種里先物質的自體發 合物之^她态衣置主要被分類為—種使用無機化 人物之：、顯不器裝置以及-種以螢光材料的有機化 裝置。至今這種-顯示器裝置被強 視角、快速反應逮度、以及”二:溥外觀、寬廣 器。 以及同對比寺優點的後世代顯示 有機EL顯示器裝置包含 輸層、-發先岸、一1 層、一電子傳 其中，,、s €洞傳輸層、以及-電洞注入層。 $主入層置於陰極與陽極之間。在有機肛顯 1376664 示器裝置中，如果一預設電壓作用於陰極與陽極之間， 從陰極產生的一電子將經由電子注入層與電子傳輸層 ' 向發光層移動，而且從陽極產生的一電洞將經由電洞注 入層與電洞傳輸層向發光層移動。因此，由電子傳輸層 與電洞傳輸層所提供的電子與電洞將於有機發光層復 合且產生光。 ' 使用有機EL相關技術的有機發光二極體顯示器之 • 每一像素的電路結構如「第1圖」所示。 「第1圖」是一個等效電路圖用以表示相關技術的 有機發光二極體顯示器中之一像素。 參考「第1圖」，有機發光二極體顯示器的每一像 素包含一開關電晶體S_TR1、一儲存電容Cst、一有機 發光二極體OLED、以及一驅動電.晶體D_TR1。其中’ 開關電晶體S_TR1是藉由閘電路GL提供之掃描脈衝而 . 開啟以切換由資料電路DL提供之資料電壓。開關電晶 ® 體S_TR1提供之資料電壓充電於儲存電容Cst之中。有 機發光二極體OLED由具有高電源電壓VDD之電源端 • 所提供之驅動電流而開啟發光。驅動電晶體D_TR1藉 - 由開關電晶體S_TR1之資料電壓或儲存電容Cst之充電 電壓來驅動有機發光二極體OLED。 開關電晶體S_TR1是一種N型金氧半導體（NMOS) 電晶體，具有一閘電極、一汲電極、以及一源電極。其 中，閘電極是連接到閘電路GL。汲電極連接到資料電 8 1376664 路DL。源電極通常連接到儲存電容Cst與驅動電晶體 D—TR1的閘電極。開關電晶體S—TR1是藉由一提供自 ' 閘電路GL之掃描脈衝而開啟以將資料電路DL之資料 電壓給儲存電容Cst與驅動電晶體D_TR1。 儲存電容Cst之一端通常連接到開關電晶體S_TR1 與驅動電晶體D_TR1之閘電極，而儲存電容Cst之另一 " 端則接地。提供自開關電晶體S_TR1之資料電壓充電於 $ 儲存電容Cst。當一提供自切換開關電晶體S_TR1之資 料電壓沒有作用於驅動電晶體D_TR1之閘電極時，儲 存電容Cst釋放出一放電電壓去維持該驅動電晶體 D_TR1之閘電壓。因此，雖然原提供自開關電晶體 S_TR1之資料電壓沒有提供，驅動電晶體D—TR1仍能 藉由儲存電容Cst之放電電壓維持開啟狀態，並持續一 段因儲存電容Cst所保持的維持週期。其中，當提供自 . 開關電晶體S_TR1之資料電壓沒有作用於驅動電晶體 _ D_TR1之閘電極時，驅動電晶體D—TR1的閘電壓貝|J停 止。 - 有機發光二極體OLED具有一個陽極與一個陰極。 - 在此，陽極連接到一提供高電源電壓VDD之電源端。 陰極連接到驅動電晶體D_TR1之汲電極。 驅動電晶體D_TR1是一種N型金氧半導體（NMOS) 電晶體，具有一閘電極、一汲電極、以及一源電極。其 中，閘電極通常連接到開關電晶體S_TR1之源電極與開 9 1376664 關電晶體S_TR1。汲電極連接到有機發光二極體OLED 之陰極。源電極則接地。驅動電晶體D_TR1藉由開關 ' 電晶體S_TR1所提供給閘電極之資料電壓而開啟，或藉 由提供給閘電極之開關電晶體S_TR1之放電電壓而開 啟，該放電電壓用以將流入有機發光二極體OLED之驅 動電流切換至接地點。藉由這樣的方式，流入有機發光 '二極體OLED之驅動電流被切換到接地點，因此有機發 光二極體OLED藉者由向電源電壓VDD所產生的驅動 電流而發光。 在相關技術的有機發光二極體顯示器中包含著具 有上述等效電路的像素，雖然由於直流電壓作用於閘電 極，使得驅動電晶體D_TR1從開啟之狀態變換成一關 閉狀態，閘放電電壓依然維持著。因此，產生一個問題 就是驅動電晶體D_TR1會退化。特別在相關技術的有 : 機發光二極體顯示器中，因為一充電於驅動電晶體 • D_TR1之閘電極的電壓從先前訊框維持至|J目前訊框，所 以在螢幕上產生殘像。 、 【發明内容】. - 本發明是為了去解決上述問題。因此，本發明之目 的是提供一種有機發光二極體顯示器及其驅動方法，用 以在目前訊框變換到下一訊框之前移除一充電於驅動 電晶體閘電極之電壓。 本發明之另一目的是提供一種有機發光二極體顯 10 不益及其驅動方法用 閘放電電堅而& L 在訊框下移除一驅動電晶體 以防止驅動電晶體退化。
本發明之又一 B 示器及其_方法的是提供—種有機發光二極體顯 前移除電日2以在目前訊框變換到下-訊框之 為了達到本發_ = 4而錯螢桊殘餘影像。 之有機發光-極：些目的，根據本發明之實施例 數個包含器包括—顯示器面板，其具有複 控制輪入影像資極體之像素；一計時控制器，其 時間；—個資料驅更新電壓之提供 框的數位㈣⑼。。/、料時㈣11輸出給目前訊 素，資料電•，並將其提供給像 擇出的像素;」計時控制器的控制所選 給目前訊_ ^ 要提供—個掃描脈衝 水平週期以選擇要提供資料的像素，之 :私供一個掃描脈衝給目前訊框 電㈣像素』。致的像素之中去選擇被提供更新 更新電壓為一零伏特電壓。 更新電壓為一負電歷。 器 計時控制器產生更新電遷且將其作用於資料驅動 11 1376664 计時控制器提供一遮蔽訊號給閘驅動器以調敕第 一水平週期與第二水平週期。 正 第一水平週期與第二水平週期各為一半水平週期。 第一水平週期與第二水平週期不相同。 / 閘驅動益於第二水平週期提供一掃描脈衝以 所有在顯示器面板上的像素。 〜 閘駆動a於第二水平週期不提供—掃描脈 少—個在顯示器面板上之像素。 忾，-。至 驅動有機發光二極體一 -具有複數個包4 一有…之方法該·器包含 面板，此方法包括產 ： 衝於第一水平週期要徒供知描脈 ^ ^趴 °削訊框以選擇被提供資料 素，將-輸入給目前訊框的 切像 電壓並將其提供认获士 貝针粉換成一類比資料 ，登裡山 /、··，。稭由一掃描脈衝於第一 選擇出的像素；其次，αθ 弟水千週期所 水平週期以選擇在：丨¥描脈衝給目前訊框第二 及提供更新電壓ΖΤΤ提供更新電㈣像素;以 平週期所選出的像素。化服衝於目前訊框第二水 在本方法中，更新電 在本方法中s ώ 7伏锊電壓。 在本方法中，第一 、、電I。 半水平週期。 /週期與第>二水平週期各為一 在本方法中，笛 , 水平週期與第二水平週期不相 12 同。 平週期 广衣顯不盗面板上之像素於第二水 -掃福脈•而被選擇出來。 /驟中邊“供 屏之法中’於第二水平週期在選擇被提供更新電 二=一掃描派衝不提供給至少-個在顯 【實施方式】 八二:’本發明之平面顯示器面板與其製作方法將配 σ _叭砰細說明如下。 雕- ί 一圖」為根據本發明實施例的-有機發光二極 肢结員示器之結構圖。 蒼考「第2圖」’本發明之有機發光二極體顯示器 匕合—顯示器面板110、一更新電壓產生哭 計時控制器-、-資料驅動請、以及二問驅動： 150。其中，一電源電壓作用於更新電壓產生器12〇以 產生一更新電壓以移除驅動電晶體D—TR1之閘放電電 壓。計時控制器no控制輸入系統之影像資料的驅動時 間，，且同時控制更新電壓的提供時間。資料驅動器14〇 將從计盼控制器130輸入到目前訊框之數位資料轉換為 類比資料電壓並將其提供給顯示器面板11〇之像素，之 後將更新電壓產生器120所提供之更新電壓給顯示器面 板110上與計時控制器130之資料驅動控制訊號 13 1376664 一致的像素。閘驅動器150於一半水平週期中連續地為 目前訊框提供一掃描脈衝給閘電路GL1到GLn，然後連 續地於一半水平週期根據計時控制器130之閘驅動控制 訊號而提供一掃描脈衝給閘電路GL5到GLn。所控制。 複數個資料電路DL1到DLm與複數個閘電路GL1 到GLn彼此為垂直交叉。包含有機發光二極體OLED 之像素設置於交叉部份。「第1圖」之等效電路於是形 成於像素上。 更新電壓產生器120受到電源電壓作用而產生一更 新電壓去移除驅動電晶體D_TR1之閘放電電壓’從而 將其提供給資料驅動器140。其中，更新電壓產生器120 提供一零伏特更新電壓或一負更新電壓。這是因為只有 正直流電壓被提供給驅動電晶體D_TR1之閘電極，一 零伏特更新電壓或一負更新電壓被提供給驅動電晶體 D_TR1以移除驅動電晶體D_TR1之閘放電電壓。另一 方面，在本發明中，更新電壓產生器120產生一更新電 壓。然而，它的應用不只限於此。例如，計時控制器130 可以產生一更新電壓而將其提供給資料驅動器140。 計時控制器130被一系統如電視機或電腦螢幕等輸 入一影像資料而提供一數位資料給資料驅動器140，且 同時控制資料之驅動。 另外，計時控制器130運用與系統時間訊號CLK 一致之系統水平/垂直同步訊號Η與V產生一資料驅動 14 1376664
控币彳訊號DDC、一更新控制訊號RCS、一閘驅動控制訊 號GDC、以及一遮蔽訊號MKS。資料黯動控制訊號DDC 與更新控制訊號RCS提供給資料驅動器140。閘驅動控 市J訊號GDC與遮蔽訊號MKS提供給閘驅動器15〇。其 中’資枓驅動控制訊號DDC包含一電源偏移時鐘SSc、 一電源起始脈衝ssp、以及一電源輸出許可訊號S0E 等。閘驅動控制訊號GDC包含一閘起始脈衝gsp與一 閘輸出許可訊號GOE等。特別的是，更新控制訊號RCS 控制資料驅動器140之更新電壓的提供時間。遮蔽訊號 MKS控制掃描脈衝的水平週期。 貧料驅動器140回應一由計時控制器13〇所提供之 貝料驅動控制訊號DDC以將一由計時控制器所輸 入之數位資料轉換成一類比資料電壓並將其提供給顯 示器面板110之像素。其中，資料驅動器14〇在一更新 電堡產生器12G所提供之更新電盧的基礎下將一經由計 時控制器13 0所提供之數位f料轉換成—類比資料電壓 並將其提供給資料電路DU到DLm。其中，一類比資 料電壓係實現為顯示器面板w的有機發光Γ極體 OLED上之灰階。 ^ -貝料驅動器14〇提供—資料給 义 ----- 只打阳y刖計l框，然後為 目前訊框而提供—更新電壓給藉由計時控制器130之 新控制訊號似所選擇出的顯示器面板ιι〇上之像素 麥考「第3圖」，資料驅動器14〇提供一資料給 15 1376664 由掃描脈衝而選擇出的像素。在此， 平週期，閘驅動器150逆择 則》框的半水 GU到GLn。如果提知描脈衝給閉電路 就提供—Μ〜 貞料到像素，則資料驅動器Μ0 , 由掃描脈衝所選擇Α之像辛。在 ::於目前訊框的半水平週期，間驅動 供清描脈衝給閘電路GL5到GLn。其中 : 供到驅動電晶體DH $墊破提 -之閘電極以除去目前訊框之閘 因此，本發明能夠防止驅動電晶體的退化並 同除去螢幕的殘餘影像。 問驅動器15G丨了目前訊框要提供料給問電路 到GLn ’所以其連續地提供—掃描脈衝，缺後再回 應閑·動控制訊號GDC與「第3圖」所示之計時控制 益Π0所提供之閘偏移時鐘咖以連續地提供一更新 用之掃描脈衝給閘電路GL5到GLn。如此，閘驅動器 \50連續地於—半水平週期提供-掃缝衝，然後再連 、·’、地於-半水平週期根據計時控制器i3Q之遮蔽訊號 MKS提供-掃描脈衝。在此，如果提供—資料，然後提 供更新电I給目月ί」訊框，則資料之灰階值將實現於顯 :器面板110之每一像素，如「第4圖」所示。特別的 疋’被代供更新電壓的區域，其資料灰階值將無法實現 並且為一顯示黑暗的區域。 另一方面，在本發明中，閘驅動器】50於一半水平 週期藉由提供一掃描脈衝來選擇被提供資料之像素，以 16 及同時於—半水平週期根據遮蔽訊號廳提供 :: 來選擇被提供更新電壓的像素。然而，-掃描脈; :週期不只限於此。例如，問驅動器150可以藉由於三 ::_水平週期提供—掃描脈衝來選擇被提供資料之 像素’並且同時可以兹_ 訊號J …水平週期根據遮蔽 素。“供脈衝㈣擇被提供更新㈣之像 .㈣、=步地’在本發明中，更新之掃描脈衝只被提 供於閘電路GL5到GI η。妙二 例如，更新m ‘ …、、而，它的應用不只限於此。 更新之知描脈衝可以連 GL1到GLn。 思戶、地破代供於所有閘電路 -更本發明提供-資料電磨，然後卽 屋。結果，本發明能夠防止驅動雷動Λ:之閉放電電 幕的殘影。 也動電曰曰體退化以及移除螢 雖然本發明以前述之較 非用以限定本發明，体e例揭路如上，然其並 發明之精神和二者’在不脫離本 本發明之專利保護範圍須視::二更:與獨飾’因此 範圍所界定者為準。 月曰所附之申請專利 【圓式簡單說明】 第1圖係為本發明之包含 , 極體顯示器之中的:邱技術之有機發光二 1豕/T'之寺效電路圖； 17 1376664 第2圖係為本發明之有機發光二極體顯示器之結構 圖； 第3圖係為本發明之有機發光二極體顯示器的操作 特徵示意圖；以及 第4圖係為本發明之有機發光二極體顯示器的灰階 示意圖。 【主要元件符號說明】
100........... ..有機發光二極體顯示器 110........... .顯示器面板 120........... ..更新電壓產生器 130........... ，.計時控制器 140........... ,.資料驅動裔 150........... .閘驅動器 GLl~GLn .. .閘電路 DL1 〜DLm · ..資料電路 S TR1....... ..開關電晶體 D TR1 . ...驅動電晶體 Cst........... ....儲存電容 OLED....... ...有機發光二極體 VDD......... ...高電源電壓 DDC......... ...資料驅動控制訊號 RCS.......... ..更新控制訊號 MKS......... 18 1376664 GDC............閘驅動控制訊號 Η ............系統水平同步訊號 V ............系統垂直同步訊號 CLK............系統時間訊號 SSC............電源偏移時鐘 SSP............電源起始脈衝 SOE............電源輸出許可訊號 GSC............閘偏移時鐘 GSP............閘起始脈衝 GOE............閘輸出許可訊號 19

Claims (1)

  1. 十、申請專利範圍： 種有機發光二極體顯示器，其包括： 一顯示器面板，該顧 有機發光二極體之像素板具有複數個包含一 一計時控制器，該計眸 料之驅動時㈣制㈣ 控心輸入影像資 h、控市彳—更新電壓之提供瞎門. 一資料驅動器，該資料驅 0眭 輪出給目十時控制器 =其‘供給該複數個像素’然後提供該更新電壓 去.Ώ 制而廷擇出之該複數個像 I，以及 -閘驅動器，該閑驅動器於目前訊框之一第一水 平週期提供—掃描脈衝以選㈣複數㈣提供資料 然後再於目前訊框之一第二水平週期根據該 μ控—之㈣而提供該掃描 數個將被提供該更新電愿之像辛。 ^ ”申請專利範圍第1項所述：有機發光二極體顯示 斋，其中該更新電壓為零伏特電壓。 3.=申請專利範圍第1項所述之有機發光二極體顯示 益，其中該更新電壓為負電壓。 ^申請專利範圍第！項所述之有機發光二極體顯示 。。其中4什b控制產生該更新電壓並將該更新電 屡提供給該資料驅動器。 20 17.^76664 如申請專利範圍第 極體顯示器之方法 被提供該更新電壓 描脈衝不提供給至 複數個像素》 之 少 】1項所述之驅動有機發光二 其t於該第二水平週期在選择 該複數個像素的步驟中該掃 一個在該顯示 不斋面板上之該
    23
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