M264798 八、新型說明： 【新型所屬之技術領域】 本創作係關於一種顯示裝置的驅動架構，特別是關於一種有 機發光二極體的驅動架構。 【先前技術】 OLED顯示器係利用有機發光二極體(Organic Light-Emitting Diodes)原理之新一代平面顯示器技術。在結構上，其為三明治結 構’其係藉由基板當中的有機化合材料施加固定電流而激發可見 光，為一種自發光的現象。也就是，0LED當中的有機薄膜，在達 到一定的電流量後，即會自行發出固定頻率的可見光，因而不需 要背光源及彩色濾光片。0LED顯示器係為一種電流控制的元件， 換句話說，每個像素(pixel)的發光可透過電流量的控制來達成。 此外，整個0LED顯示週期包含了預充電階段（precharge Phase)、顯示階段（Dispiay Phase)與放電階段（Discharge Phase)。預充電階段是為了讓接下來的顯示階段能順利進行。而 在進行電流控制0LED顯示器發光（顯示階段）後，經過放電 (Discharge)階段，才完成一個完整的顯示週期。 一至於擔負0LED顯示任務的〇led驅動器，其架構如「第工層 =者。其巾’ _存取記㈣⑽咖儲存了每次錢示的影θ 貝枓，包含了要驅動每個0LED(分別連接於SEG w的灰階值 而電流源30則負責供應固定電流給每個 電壓給每個驅動單元。第—驅動單元以 動早兀202至第n驅動單元2〇n，每個驅 一 記憶體1G、電流源3〇與預充電壓源4()相連接個。隨？存! 後輸出至每個顯示週期所連接的⑽，動早心 耵ULliD進仃顯示控制 M264798 從「第1圖」可發現，由於驅動單祕多，所以，在 計時，每個驅動單元當中的數位電路大小會直接 ς 器的電路大小，進㈣成本。 设娜動 「第2圖」為驅動器的每個驅動單元(⑽的 兀20包含了 -個電流緩衝器22、—個 24與-個切解元26。其+, PM灰階控制單元文= j存取兄憶體10相連接，以接收影像資料。電流緩衝哭22斑 源Hi接’肋將定奴的錢秘糖出給_。耐刀 、早7G 26則”預充電壓源4Q、電流緩衝器22、讓灰階 和seg相連接），其用以i受剛 初白控制早兀24的控制，以切換電流緩衝器2 與類比接地_«三者之一連接至〇LED。 充電[源 其中，PWM灰階控制單元24控制 個階段的每個階段，其時間長度均為額定值。叫間二 PWM灰階控制單元24控制顯示週期的實現方式，請來考「第 ，電认、顯4域放電階段的控制。當為預充電階段 悲機50輸出控制訊號讓預充電計數器241開 、 電比較器242輸出切換單元26為 /°並且，預充 二==:::動:， Γ存取繼^响===== ㉙不階段的計紐。齡_^卩域此計數值#制切換單元 26的顯示階段的時間長。 T數值木控制切換早兀 叶數;=;=時’狀態機5〇便輸出控制訊號讓放電 梢副開始植並由放電比較請輸_換單元放電的 6 M264798 訊號，直到計數至放電比較器244的預設值為止。 此種架構可以達到以簡(脈寬調變）的方式來控制顯示階段 的長度。不過，由於在每個驅動單元(Cell)當中都有烟的. 因此會造成數位電路部分的面積膨脹。 、 於是，如何能用最經濟的方式來達成相同的觸控制功能， 成為電路設計人員的挑戰。 【新型内容】 鑑於以上f知技術的問題，本創作提供—種有機發光二極體 的驅動架構，可有效縮小整體電路的面積，以降低電路成本。 為達上述目的，本創作提供一種獅的驅動架構，係可控制 由多個OLED所形成之顯示矩陣中，每次掃描行或列之有機發光二 極體之發光灰階值，包含：—顯示職控鮮元，用以控制整個 顯不週期之預充f階段、顯示階段與放電階段之賴長；以及， 多個行與列驅動單元，每個驅動單元皆與—記憶體、—定額之電 :預充電壓源與類比接地相連接，並具有一連接至該多個 批m一極體之輸出端。其中，顯示週期控制單元係直接輸出 二氣控制3亥多個有機發光二極體與預充電壓源之連接以控制着 =電階段’並控繼多個有機發光二極體與·接地之連接以 電階段，而顯示職㈣單元並控細示隨之時間長且 夕二二個^與舰動單元接收記紐賴示資料以控制每個對應 :與該電流源之連接以控制顯示時間長。 下々it創作之上述和其他目的、特徵、和優點能更明顯易懂’ ^特舉數個較佳實施例，並配合所關式，作詳細說明如下： L貫施方式】 為讓本創作之上述和其他目的、特徵、和優點能更明顯易懂， 7 M264798 下文個較佳實施例，並配合所附圖式，作詳細說明如下. =透過改善每個Cell的架構，並由一個G : 行顯示週期的部分控制，藉以降低每個⑽ :參考「第4圖」’由於顯示週期的時間 ；' Cell ，0,b 6〇 ⑽、她咖瓣㈣、放電計數器 單原先設計於每個⑽當中的PWM灰階控制 數器數Γ1、放電計數器63與顯示計 孜^不週期控制早讀t中來做統—的時間 方式：創作將原先交由每個Cel1個別控制整個顯示週期的 段均由L週：：：：::段。而預充電階段與放電階 由顯示週期控制控制。顯示階段的時間長度同樣 事實t，整細LED❾Ρ麵顯示控制，最重要的部分在於 戶^制1而顯示時Γ長度的控制，係由PWM灰 次斗1而里山I空，其係依據由隨機存取記憶體10所寫入的 1Γ"。顯示時間的控制必須依據隨機存取記憶體10填人 象貧料而定，因此，其為PWM灰階控制單元2!唯 :比:二個Cel1當中的功能。這個保留的功能，可以由顯 不比較裔21a來達成。 計數==+lla的動作，係由狀態機50輸出控制訊號讓顯示 中_ : = ，_此時’問鎖電路12將隨機存取記麵10當 中_不貝枓傳給顯示比較器21a，以表示顯示階段的計數值。顯 8 M264798 示比較器21a即依據此計數值控制切換單元26的顯示時間長。 至於其他的預充電階段與放電階段，皆不會因為顯示資料的 不同而有所改變。因此，控制預充電階段與放電階段切換單元時 間的預充電比較器62與放電比較器64皆可置於外部統一的顯示 週期控制單元60當中。 於是，每個驅動單元2〇a的架構會變成「第5圖」所示者。 其包含了 ：電流緩衝器22、顯示比較器21a與切換單元26。原先 的PWM灰階控制單元，改為顯示比較器21a。 其中，顯示比較器21a與隨機存取記憶體1〇相連接，以接收 影像資料。電流緩衝器22與電流源30相連接，用以將定電流的 電流源控制輸出給OLE1D。而切換單元26則與預充電壓源4〇、電 流緩衝器22、顯示比較器21a、類比接地(GNDA)* 〇LED (透過SEG 相連接）等相連接，其由顯示週期控制單元6〇與顯示比較器2ΐ& 共同控制，以切換電流、緩衝器22、預充電壓源4〇與類比接地(G腿） 三者之一連接至OLED。 員示比較态21a的輸出控制，係依據隨機存取記憶體經由 問鎖電路12所送來的影像資料，來控制切換單丨％的輸出。以 顯不週期為256個Clock為例，如RAM送來的資料為128，表示灰 P皆值為128，顯示比較器21a即設定顯示時間長為128。當顯示週 期到了顯示階段時，顯示週期控制單A 6〇當中的顯示計數器65 開始计數’顯示比較器21a即會輸出開的控制訊號至切換單元26， 切換單το 26即將電流緩衝器22接至SEG，對0LED進行顯示充電； 當計數值到128個Clock時，顯示比較器21a即會輸出關的控制 訊號到切換單元26，切換單^ 26即會切換娜接至類比接地 (GNDA) ’此時〇LED即停止顯示。 可以發現’本創作的0LED驅動架構，讓每個驅動單元的酬 M264798 灰p白控制早凡簡化，因而減少了每個驅 驅動單元數量越多__， 的電路面積。對於 接著，請參考「第fi八 積降低的效果越明顯。 於每個SEG的I奸獅」’』不了整個0LED驅動架構。由 w”、'貝不週期都相同，因此， ^ 顯，期控制單元60來進行控制每 都可透過 其中，隨機存取記憶體⑽_儲存^^顯示階段。 料，包含了要驅動每個_(分別連接於人要_的影像資 電流源30則負責供_定電流 轉1〜n)的灰階值；而 驅動皁元202a至第]v驢私⑽-〇πμ — 201a、第一 存取記憶體10、H a ’母個购單神個別與隨機 …2 源30與預充電壓源40相連接。每她r :“出至每個顯示週期所連接的•以對。⑽進行顯示： 每個驅動單元的架構，都如「第5圖 長並透過母個驅動單元對於每個〇L = 控制’兩者配合即可達到謂方式控制間長的 此外’本麟所稱之灰階鶴為二位元以上之灰階值。 太合丨^、、、本創作之祕實_減如上所述，料並義以限定 〜任何熟習侧技，在不雌本_之精神和範圍内， 許之更動與潤飾，因此本創作之專利保護範圍須視本說 田斤附之申凊專利範圍所界定者為準。 【圖式簡單說明】 第1圖係為習知技術的OLED驅動架構示意圖； 第2圖係為習知技術的〇LE：D驅動器的每個Ceii的架構圖； 第3圖係為習知技術的〇LE：D驅動器當中的pwM灰階控制單元 M264798 的架構圖， . 第4圖係為本創作的OLED驅動器當中的PWM灰階控制單元的 架構圖； 第5圖係為本創作的OLED驅動器的每個Cell的架構圖；以 及 第6圖係為本創作之OLED驅動架構示意圖。 【主要元件符號說明】 10 隨機存取記憶體 12 閂鎖電路 20 驅動單元 20a 驅動單元 201 第一驅動單元 202 第二驅動單元 20η 第N驅動單元 21 P丽灰階控制單元 21a 顯示比較器 22 電流緩衝器 24 P丽灰階控制單元 241 預充電計數器 242 預充電比較器 243 放電計數器 244 放電比較器 245 顯示計數器 246 顯示比較器 26 切換單元 30 電流源M264798 8. Description of the new type: [Technical field to which the new type belongs] This creation is about a driving structure of a display device, especially a driving structure of an organic light emitting diode. [Previous Technology] OLED displays are a new generation of flat-panel display technology using the principle of Organic Light-Emitting Diodes. Structurally, it is a sandwich structure. It is a self-luminous phenomenon that excites visible light by applying a fixed current through an organic compound material in a substrate. That is, the organic thin film in the 0LED will emit visible light at a fixed frequency after reaching a certain amount of current, so there is no need for a backlight and a color filter. The OLED display is a current-controlled element. In other words, the light emission of each pixel can be achieved by controlling the amount of current. In addition, the entire 0LED display cycle includes a precharge phase, a display phase (Dispiay Phase), and a discharge phase (Discharge Phase). The pre-charging phase is to allow the subsequent display phase to proceed smoothly. After the current-controlled 0LED display is illuminated (display phase), a complete display cycle is completed after the discharge phase. As for the 0LED driver, which is responsible for the 0LED display task, its structure is like "the first layer = person. Its towel" _ access record stores the shadow of each time display θ shell, including to drive each 0LED ( The gray scale values connected to the SEG w respectively and the current source 30 is responsible for supplying a fixed current to each voltage to each drive unit. The first drive unit is driven by the early 202 to the nth drive unit 20n, each driving one Memory 1G, current source 30 and pre-charged voltage source 4 () are connected. Save? After that, the output will be connected to each display cycle, and act as early as possible. ULliD enters the display control M264798. It can be found that, because there are many drivers, so in timing, the digital circuit size in each driver unit will directly increase the circuit size of the driver, which will increase the cost. Let's move the "Figure 2" for each driver. The driving unit 20 includes a current buffer 22, a 24, and a resolving unit 26. Its +, PM gray-level control unit = j access memory 10 is connected to receive the image Information. The current buffer cries 22 Bianyuan Hi connected to the ribs will give Ding slave money secret sugar to _. Knife resistance, Early 7G 26 is "pre-charged voltage source 4Q, current buffer 22, so that the gray scale and seg are connected), which is used to control by the early white control early Wu 24 to switch the current buffer 2 and analog ground_ «One of the three is connected to 〇LED. Charging [source Among them, the PWM gray-scale control unit 24 controls each phase of the stage, and the length of time is a rated value. Called between two PWM gray-scale control unit 24 controls the display cycle To realize the implementation method, please come to the test of "the fourth stage of the electric recognition and display of the four-phase discharge control. When the pre-charging stage 50 outputs a control signal to let the pre-charge counter 241 turn on, the electric comparator 242 output switching unit 26 is / ° In addition, the pre-charging time == :::::, Γ access to follow the response ===== ㉙ no stage of the calculation. Age ^ 卩 domain this count value # system switching unit 26 display time is long . T value wood control switch the number of early leaves; =; = when the state machine 50 will output a control signal to let the discharge tip start planting and the comparison of the discharge please enter the 6 M264798 signal of the unit discharge until the count reaches the discharge comparison Up to the default value of the controller 244. This architecture can be achieved in a simple (pulse width modulation) manner. Length of the display stage. However, because there is smoke in each driving unit (Cell), it will cause the area of the digital circuit section to expand. Therefore, how can the same touch control function be achieved in the most economical way? It becomes a challenge for circuit designers. [New content] In view of the above-mentioned technical problems, this creation provides a driving structure of organic light-emitting diodes, which can effectively reduce the overall circuit area and reduce circuit costs. To achieve the above Purpose, this creation provides a lion drive architecture that can control the light-emitting gray-scale values of organic light-emitting diodes in each row or column of the display matrix formed by multiple OLEDs, including: Element, which is used to control the length of the pre-charge stage f, display stage and discharge stage of the entire display cycle; and multiple row and column drive units, each drive unit is associated with -memory, -rated electricity: pre The charging voltage source is connected to the analog ground and has an output terminal connected to the plurality of m-pole bodies. Among them, the display cycle control unit directly outputs two gas to control the connection of multiple organic light-emitting diodes to a pre-charged voltage source to control = the electrical phase 'and control the connection of multiple organic light-emitting diodes to ground. In the electricity phase, the display of the occupation unit and the control details will take a long time, and two or two ^ and the naval unit receive the record data to control each correspondence: the connection with the current source to control the display time . The above and other purposes, features, and advantages of Xit's creation can be more clearly understood. ^ A few preferred embodiments are given, and in accordance with the relevant formulas, the details are described as follows: The above and other purposes, features, and advantages can be more clearly understood. 7 M264798 The following preferred embodiment, combined with the accompanying drawings, will be described in detail below. = By improving the architecture of each Cell, a G : Partial control of the line display cycle to reduce each ⑽: Refer to "Figure 4" 'Because of the display cycle time;' Cell ， 0, b 6〇⑽, her coffee ㈣, discharge counter were originally designed for each ⑽ The number of PWM gray-scale control counters Γ1, the discharge counter 63 and the display counter ^ aperiodic control early reading t to make a unified system-the time method: the original will be handed over to each Cel1 individually control the entire display period of the segment All by L week :::::: section. The pre-charge phase and discharge phase are controlled by the display cycle control. The length of the display phase is the same as the fact t. The most important part of the display control of the fine LED display is the control of the length of Γ when the display is customized. It is controlled by the PWM gray time bucket 1 and the Satoyama I space. 1Γ " written in the memory 10 is accessed. The control of the display time must be determined based on the lack of human memory in the random access memory 10. Therefore, it is a PWM gray-scale control unit 2! This reserved function can be fulfilled by the display 21a. The action of counting == + lla is output by the state machine 50 to control the display _: =, _ At this time, the 'lock circuit 12 will pass the random access memory 10 to the display comparator 21a, To indicate the count value of the display phase. Display 8 M264798 indicates that the comparator 21a controls the display time of the switching unit 26 based on the count value. As for the other pre-charging and discharging phases, they will not change due to different display data. Therefore, the precharge comparator 62 and the discharge comparator 64 that control the time between the precharge phase and the discharge phase switching unit can be placed in the external uniform display cycle control unit 60. Then, the structure of each driving unit 20a will become as shown in "Fig. 5". It includes: a current buffer 22, a display comparator 21a, and a switching unit 26. The original PWM gray-scale control unit was changed to display the comparator 21a. The display comparator 21a is connected to the random access memory 10 to receive image data. The current buffer 22 is connected to the current source 30 to output a constant current source control to OLE1D. The switching unit 26 is connected to a precharge voltage source 40, a current buffer 22, a display comparator 21a, an analog ground (GNDA) * 〇LED (connected via SEG), etc., which is connected by the display cycle control unit 60 and The display comparator 2ΐ & is jointly controlled to connect one of the switching current, the buffer 22, the precharge voltage source 40 and the analog ground (G leg) to the OLED. The output control of the staff comparison state 21a is based on the image data sent from the random access memory via the interlock circuit 12 to control the output of the switching order. Taking the display period as 256 clocks as an example, if the data sent from RAM is 128, it means that all gray P values are 128, and the display comparator 21a sets the display time to 128. When the display period has reached the display phase, the display counter 65 in the display period control sheet A 60 will start counting. The display comparator 21a will output the open control signal to the switching unit 26, and the switching sheet το 26 will connect the current buffer 22 Go to SEG to display and charge 0LED. When the count value reaches 128 Clock, the display comparator 21a will output the off control signal to the switching unit 26, and the switching unit ^ 26 will switch the Na to the analog ground (GNDA) ' 〇LED will stop displaying. It can be found that the 0LED drive architecture of this creation makes the compensation of each drive unit M264798 gray and white control simple and simplified, thereby reducing the circuit area of each drive drive unit. For the next, please refer to "The more obvious the effect of reducing the fi eighth product. The lion for each SEG" '"can not be the entire 0LED drive architecture. Since w ”and 'because the cycles are the same, therefore, the ^ display and period control unit 60 can control each of them through the random access memory ⑽_storage ^^ display stage. The material contains the data to drive each The gray scale value of _ (respectively connected to the image source current source 30 is responsible for supplying _ constant current to 1 ~ n); while driving the saponin 202a to the first] vdonkey-0πμ — 201a, the first Access to memory 10, H a 'mother purchase order God individually and randomly ... 2 source 30 is connected to the pre-charge voltage source 40. Each she r: "out to each connected in the display cycle • pair. ⑽ Show: The structure of each drive unit is as shown in the figure 5 and through the parent drive unit for each 〇L = control 'The two can be combined to achieve the control of the predicate mode. The gray-scale crane is a gray-scale value of more than two bits. Taihe 丨 ^ 、、、 The secret of this creation_ minus as mentioned above, the material is synonymous to limit ~ any familiar side skills, in the spirit of the female Within the scope and scope, Xu Zhi changed and retouched, so the scope of patent protection for this creation must be determined by the scope of the patent application attached to this book by Tian Jin. [Simplified illustration of the drawing] Figure 1 is a conventional technology OLED drive architecture diagram; Figure 2 is a diagram of each Ceii of the conventional technology OLE: D driver; Figure 3 is a pwM grayscale control unit M264798 of the conventional technology: OLE: D driver Architecture diagram. Figure 4 is the architecture diagram of the PWM gray-scale control unit in the OLED driver of this creation; Figure 5 is the architecture diagram of each Cell of the OLED driver of this creation; and Figure 6 is this Schematic diagram of the OLED driving architecture created ] 10 RAM 12 Latch circuit 20 Drive unit 20a Drive unit 201 First drive unit 202 Second drive unit 20n Nth drive unit 21 P Gray scale control unit 21a Display comparator 22 Current buffer 24 P Li Gray-scale control unit 241 Precharge counter 242 Precharge comparator 243 Discharge counter 244 Discharge comparator 245 Display counter 246 Display comparator 26 Switching unit 30 Current source
11 M264798 、40 預充電壓源 、50 狀態機 60 顯示週期控制單元 61 預充電計數器 62 預充電比較器 63 放電計數器 64 放電比較器 65 顯示計數器 i GND 接地 GNDA 類比接地 SEG(1〜η)掃描線11 M264798, 40 pre-charge voltage source, 50 state machine 60 display cycle control unit 61 pre-charge counter 62 pre-charge comparator 63 discharge counter 64 discharge comparator 65 display counter i GND ground GNDA analog ground SEG (1 ~ η) scan line