493118 A7 B7 經濟部智慧財產局員工消費合作社印製 五、發明説明（ί ) 【本發明之領域】 本發明係有關一種有機發光發射平面顯示板之驅動電 路，尤指一種具有自動鉗位預充電功能的定電流驅動電 路。 【本發明之背景】 按’有機發光二極體（〇rganic iight emitting diode ’ OLED )係一種有機薄膜半導體發光元件，因 此’以OLED構成二維陣列即可作為平面顯示板 (display panel ) 〇 一般而言’有機發光發射平面顯示板（OLED panel)可以用較省電的定電壓驅動法來驅動，但由於平 面顯7F板上的各有機發光二極體元件有切入電壓 voltage )不均勻的問題，因此會造成以定電壓驅動時， 各有機發光二極體元件導通大小不一致，而使得發出的光 強度不甚均勻。 ' 此外，由於有機發光二極體的發光強度與接面的電子 笔洞復a所產生的電泥成正比，而此電流與接面電壓呈近 似指數關係，因此對接面電壓的變動十分敏感，所以為了 維持整片二極體陣列發光強度的均勻性，採定電流驅動是 較佳的選擇。 _第8圖表示習知以定電流驅動之有機發光發射平面顯 不板與驅動電路的系統構造圖，其中，驅動電路包括有一 仃驅動電路81及一列驅動電路82，該行驅動電路81包含 ———一 —____ 本Ά張尺_家標準（CNS ) A4規格（21Gx2 I) ------—_ (請先閲讀背面之注意事項再填寫本頁) •—^9.493118 A7 B7 Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs. 5. Description of the Invention (Field of the Invention) The present invention relates to a driving circuit for an organic light-emitting emission flat display panel, especially an automatic clamping precharge Functional constant current drive circuit. [Background of the present invention] According to the 'organic light emitting diode' (OLED) is an organic thin film semiconductor light emitting element, so 'a two-dimensional array with OLED can be used as a flat display panel (display panel). 〇General In terms of 'organic light-emitting emission flat panel (OLED panel) can be driven by a more power-saving constant voltage drive method, but because the organic light-emitting diode elements on the flat display 7F board has a problem of uneven cut-in voltage (voltage) Therefore, when driving at a constant voltage, the conduction sizes of the organic light emitting diode elements are not the same, and the emitted light intensity is not uniform. 'In addition, since the luminous intensity of the organic light-emitting diode is proportional to the electric mud generated by the electronic pen hole complex a of the interface, and this current has an approximately exponential relationship with the interface voltage, it is very sensitive to changes in the interface voltage. Therefore, in order to maintain the uniformity of the luminous intensity of the entire diode array, a constant current drive is a better choice. _Figure 8 shows the system structure of a conventional organic light-emitting emission display panel and driving circuit driven by a constant current. The driving circuit includes a stack of driving circuits 81 and a column of driving circuits 82. The row of driving circuits 81 includes— —— 一 —____ This ruler _ home standard (CNS) A4 specification (21Gx2 I) ------—_ (Please read the precautions on the back before filling out this page) • — ^ 9.
、1T 0,. A7 ' ----- B7 _ 五、發明説明（jT) 一 ' —--1 ( :參考偏壓產生器811與複數個定電流行驅動單元812， | X 2*驅動電路8 !之電路結構如第9圖所示，其參考偏壓I | =益8U分別與每—定電流驅動單元812形成—^ j 路，、以依據輸入端C0LI所輸入來自一行資料移位暫存器| | 之値而開啓開關電晶體Mp s，俾由輸出電晶體〇自j| | 輸出端C〇LO提供定電流之輸出，且為了降低有機發光：| j 極體之接面電容與佈線雜散電容所引起的殘影現象，每—| j 定電流驅動單元812都附有—受放電控制訊號端⑽㈣|秦 的放電電晶體MND，以在電流驅動之前短暫地打開，❿ 將有機發光二極體接面電容與佈線雜散電容的儲存電荷& j、 1T 0 ,. A7 '----- B7 _ V. Description of the invention (jT) a' ---- 1 (: Reference bias generator 811 and a plurality of constant current line drive units 812, | X 2 * drive The circuit structure of the circuit 8 is shown in FIG. 9, and the reference bias voltage I | = 8U is formed with each of the constant-current driving units 812-j to shift from a row of data according to the input from the input terminal C0LI. The register | | is turned on and the switching transistor Mp s is turned on. The output transistor 〇 from j | | The output terminal C0LO provides a constant current output, and in order to reduce the organic light emission: | j junction body capacitance After-image phenomenon caused by stray capacitance and wiring, every — | j constant current drive unit 812 is attached — the discharge control signal terminal ⑽㈣ | Qin ’s discharge transistor MND to turn on briefly before current drive, ❿ will Stored Charges & Junction Capacitors & Stray Capacitors of Organic Light Emitting Diodes & j
漏掉。 I 經濟部智慧財產局員工消費合作社印製 再請參照第8圖所示，該列驅動電路82則包含有複數 個連接至一列掃瞄移位暫存器84之反相器821，藉此，在 同步信號（HSYNC，VSYNC)及時脈信號（HCLK)之 制下可由選足之足電流驅動單元822的輸出端 來輸出電流至整行之有機發光二極體，並由選定之反相器 821將整列之有機發光二極體導通電流没入，藉此而點亮 需要發光之有機發光二極體。 而就一般應用而言，一個0.1 mm2大小的發光像素，在 1/64工作週期（duty )的操作條件，驅動電流僅須數十 微安培（例如：25μΑ)，即可達到所需亮度，但以64χ 64有機發光發射平面顯示板為例，薄膜電極佈線的雜散電 容與二極體陣列接面電容，會在驅動每_個像素時產生數 百微微法拉（例如·· 6〇〇pF)的寄生電容，因此採如第8Missed. I Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs. Please refer to FIG. 8. The column driving circuit 82 includes a plurality of inverters 821 connected to a column of scan shift registers 84. Under the system of synchronization signals (HSYNC, VSYNC) and clock signals (HCLK), the output terminal of the selected foot current drive unit 822 can output current to the entire row of organic light emitting diodes, and the selected inverter 821 The entire row of organic light-emitting diodes is turned on, thereby lightening the organic light-emitting diodes that need to emit light. For general applications, a 0.1 mm2 light-emitting pixel can achieve the required brightness under operating conditions of 1/64 duty cycle (duty), only tens of microamperes (for example: 25μΑ), but Taking a 64 × 64 organic light-emitting emission flat display panel as an example, the stray capacitance of the thin-film electrode wiring and the junction capacitance of the diode array will generate hundreds of picofarads when driving every pixel (for example, · 600pF) Parasitic capacitance, so adopt the 8th
493118 經濟部智慧財產局員工消費合作社印製 A7 B7 五、發明説明（9 ) 一 圖所7F單純的足電流驅動的電路來驅動，則驅動電流首先 對這些寄生電容充電，則如第10圖所示，在約200微秒 (μ8 )的驅動區間内，0LED二極體的端電壓須耗時15〇 多微秒才能充到足以讓接面導通25 μΑ電流所需的電壓 (为7 V )，因此造成眞正發光的時間大大縮短，且使得 發光強度難以達到期望値。 為改善此缺失，採定電流驅動時得加入一預充電功 能，而一般的預充電方法如第丨丨圖之電路圖所示，是在驅 動區間的如緣以一開關將作為預充電用的pM〇s元件 MPPRE的閘極短暫地短路到地，以便產生瞬間大電流來 將雜政電谷快速充到鬲電位，但此方法有三個缺點，參考 第1 2圖，其第一個缺點是雜散電容的端電壓會被充得過 鬲，因此，有機發光二極體在此時區的接面電流就會比預 疋要的驅動電流大很多；其次，在預充電結束後，雜散電 容上過局、的端電恩得慢慢地透過有機發光二極體放電，如 此，也使得眞正通過接面的電流大小難以控制，特別是此 預充包會產生很大的電泥與時間乘積也就是有很大的固定 電何T，因此將很難以調整驅動電流的大小來調整面板的 冗度，第二個缺點是它需求一個獨立且寬度甚窄的預充電 控制脈衝信號，以便將第一缺點所會引發的發光不均勻缺 點減到最低。因此，前述應用於有機發光二極體顯示面板 之定電流驅動電路裝置實仍有予以改進之必要。 發明人爰因於此，本於積極創新之精神，亟思一種可 以解決上述問題之「具有自動鉗位預充電功能的定電流驅 本纸張尺度顧巾目g家;^ ( CMS ) A4規格（21GX2%公羡）"—-—- ·——-IJ-破-------^------Hr (請先閲讀背面之注意事項再填寫本頁) 493118 五、發明説明（斗） 動電路裝置」，幾經研究實 明。 5細、，、至凡成此項新穎進步之發 【本發明之概述】 此本發明之主要目的係在提供_種具有自動钳位預充恭 功犯的疋電流驅動電路，其無須額外之預充電訊號，、而： 使有機發光發射平面顯示板發 ' ° σ 立古德欲极毛先均勻，能有效解決前述習 知有機發光發射平面顯示板之_電路的所有缺失。 本發明之另一目的係在提供一種具有自動钳位預充電 功能㈣電流驅動電路，其可透過-選擇開關而將此定; 流驅動電路切換成電壓驅動模式，而得以適用於較不 發光均勻度但要求低耗電損失的用途。 經 濟 部 智 慧 財 產 局 消 費 合 作 社 印 依據本發明之-特色，所述之具有自動甜位預充電功 能的定電流驅動電路主要包括：一參考偏壓產生器，並偏 愿輸出端提供-參考偏壓；以及，複數㈣電流驅動單 疋，每：個定電流驅動單元與該參考偏壓產生器形成電流 鏡。而該定電流驅動單元包括：一開關電晶體，係由一輸 入端所控制而導通或關閉；一電流輸出電晶體，其連接該 開關電晶體及參考偏壓產生器之偏壓輸出端，以當該開關 電晶體導通時，輸出定電流；以及，_預充電電晶體，其 閘極與該電流輸出電晶體之閘極相連而共同連接至該參考 偏壓產生器之偏壓輸出端，其源極及汲極分別與該電流輸 出電晶體之汲極及源極相連，據此，當該輸出電晶體輸出 定電流以驅動有機發光二極體時，由於該預充電電晶體的 493118 五、發明説明（r ) 閘源極包壓大於臨界電壓而導通，使該預充電電晶體以其 汲源極包况提供作為額外的大電流對所驅動的有機發光二 極體作快速預充電，直到閘源極電壓小於臨界電壓時，該 預充電電晶體即自動關閉而停止充電。 ^依據本發明之另一特色，所述之具有自動鉗位預充電 功能的疋電流驅動電路主要包括··一參考偏壓產生器，其 偏壓輸出端提供一參考偏壓；以及，複數個定電流驅動單 元，每-個定電流驅動單元與該參考㈣產生器形成電流 鏡、，該定電流驅動單元包括：—開關電晶體，係由一輸入 端所控制而導通或關閉；一電流輸出電晶體，其連接該開 關電晶體及參考偏壓產生器之偏壓輸出端，以當該開關電 晶體導通時，輸出定電流；以及，一二極體陣列，其陽極 與陰極係分別連接於電流輸出電晶體的汲極與源極，據 此，當該輸出電晶體輸出定電流以驅動有機發光二極體 時，該二極體陣列會導通而提供額外的大電流對所驅動= 二極體作快速預充電，4到該二極體陣列的端電壓小於其 切入電壓後，即自動斷開而停止預充電。 、 依據本發明之再一特色，在所述之具有自動鉗位預充 毛功旎的足電流驅動電路中，於該參考偏壓產生器之偏壓 輸出端與各定電流驅動單元的預充電電晶體與電流輸出電 晶體之閘極間設置有一多工器，該多工器之二輸入端分別 連接至該參考偏壓產生器之偏壓輸出端及接地，而輸=端 連接預充電電晶體與電流輸出電晶體之閘極，以將驅動# 路切換成電流驅動或電壓驅動模式。 i 中ϋ家標準（CNS ) Μ規格（210><29織 illJ — 4! (請先閲讀背面之注意事項再填寫本頁)493118 Printed by A7 B7, Consumer Cooperative of Intellectual Property Bureau of the Ministry of Economic Affairs. 5. Description of the Invention (9) Figure 7F is a simple full-current driving circuit to drive. The driving current first charges these parasitic capacitors, as shown in Figure 10. It is shown that in the driving interval of about 200 microseconds (μ8), the terminal voltage of the 0LED diode must take more than 150 microseconds to charge enough voltage to make the interface conduct 25 μA current (7 V) Therefore, the time during which the plutonium is emitting light is greatly shortened, and the luminous intensity is difficult to reach the desired plutonium. In order to improve this defect, a pre-charging function must be added when driving with a constant current. The general pre-charging method is shown in the circuit diagram in Figure 丨 丨. A switch in the driving section will be used as a pM for pre-charging. 〇s the gate of the MPPRE element is short-circuited to the ground for a short time, in order to generate an instantaneous high current to quickly charge the miscellaneous electricity valley to the 鬲 potential, but this method has three shortcomings. Refer to Figure 12 for the first shortcoming. The terminal voltage of the stray capacitance will be overcharged. Therefore, the junction current of the organic light-emitting diode in this time zone will be much larger than the driving current required by the preamplifier. Second, after the precharge is completed, the stray capacitance The pass-through and end-of-charge have to slowly discharge through the organic light-emitting diode. In this way, it is difficult to control the amount of current passing through the interface, especially this pre-charge pack will produce a large electric mud and time product. That is, there is a large fixed voltage T, so it will be difficult to adjust the redundancy of the panel by adjusting the driving current. The second disadvantage is that it requires an independent and very narrow precharge control pulse signal in order to convert the first One The defects caused by the uneven light emission caused by the defects are minimized. Therefore, the aforementioned constant current driving circuit device applied to the organic light emitting diode display panel still needs to be improved. Because of this, the inventor, in the spirit of active innovation, urgently thinks of a "constant current drive paper with automatic clamping and pre-charging function to drive the paper size of the paper, as well as the home; ^ (CMS) A4 specifications (21GX2% public envy) " —-—- · ——- IJ-Break ------- ^ ------ Hr (Please read the notes on the back before filling this page) 493118 V. Description of the invention (bucket) moving circuit device ", it has been proved through several studies. 5th ,,, and the most advanced development of this novel [Outline of the invention] The main purpose of the present invention is to provide _ a kind of 驱动 current drive circuit with automatic clamping pre-charge power culprits, which does not require additional Pre-charging the signal, and: Make the organic light-emitting emission flat display panel emit a ° ° σ to make the hair uniform first, which can effectively solve all the defects of the circuit of the conventional organic light-emitting emission flat display panel. Another object of the present invention is to provide a current driving circuit with an automatic clamping pre-charging function, which can be determined by a -selection switch; the current driving circuit is switched to a voltage driving mode, which can be applied to less uniform light emission Applications that require low power consumption. According to the features of the present invention, the Intellectual Property Bureau of the Intellectual Property Bureau of the Ministry of Economic Affairs, said constant current drive circuit with an automatic sweet bit pre-charging function mainly includes: a reference bias generator, and the output terminal provides -reference bias And, a plurality of ㈣ current driving units, each: a constant current driving unit and the reference bias generator form a current mirror. The constant current driving unit includes: a switching transistor, which is turned on or off under the control of an input terminal; a current output transistor, which is connected to the switching transistor and a bias output terminal of a reference bias generator; When the switching transistor is turned on, a constant current is output; and, a pre-charged transistor whose gate is connected to the gate of the current output transistor and is commonly connected to the bias output terminal of the reference bias generator. The source and drain are connected to the drain and source of the current output transistor respectively. According to this, when the output transistor outputs a constant current to drive the organic light emitting diode, the 493118 of the precharged transistor Description of the Invention (r) The gate-source envelope voltage is greater than the threshold voltage and is turned on, so that the precharged transistor provides its extra source current as an extra large current to quickly precharge the organic light-emitting diode being driven until When the gate-source voltage is less than the threshold voltage, the pre-charged transistor is automatically turned off to stop charging. ^ According to another feature of the present invention, the 疋 current driving circuit having an automatic clamping pre-charging function mainly includes a reference bias generator whose bias output terminal provides a reference bias; and, a plurality of Constant current drive unit, each constant current drive unit forms a current mirror with the reference tritium generator, the constant current drive unit includes:-a switching transistor, which is controlled by an input terminal to be turned on or off; a current output A transistor is connected to the switching transistor and a bias output terminal of a reference bias generator to output a constant current when the switching transistor is turned on; and a diode array whose anode and cathode are respectively connected to The drain and source of the current output transistor. According to this, when the output transistor outputs a constant current to drive the organic light emitting diode, the diode array will be turned on to provide additional high current to the driven = diode. The body is precharged quickly. When the terminal voltage of 4 to the diode array is less than its cut-in voltage, it will automatically disconnect and stop precharge. According to still another feature of the present invention, in the foot current driving circuit with automatic clamping pre-charging function, the pre-charging of the bias output terminal of the reference bias generator and each constant current driving unit is performed. A multiplexer is provided between the transistor and the gate of the current output transistor. The two input terminals of the multiplexer are respectively connected to the bias output terminal and the ground of the reference bias generator, and the output terminal is connected to the precharge. The gate of the transistor and the current output transistor to switch the driving circuit to the current driving or voltage driving mode. i Chinese Standard (CNS) Μ specifications (210 > &29; ill illJ — 4! (Please read the precautions on the back before filling this page)
-、1T #1. 經濟部智慧財產局員工消費合作社印製 493118 A7 B7 五、發明説明（6 ) 由於本發明構造新穎，能提供產業上利用，且確有择 進功效，故依法申請專利。 曰 為使貴審查委員能進一步瞭解本發明之結構、特徵 及其目的，茲附以圖式及較佳具體實施例之詳細說明如 后： Ό 經濟部智慧財產局員工消費合作社印製 后 【圖式 第1圖 第2圖： 第3圖： 第4圖： 第5圖： 第6圖： 第7圖 第8圖： 第9圖： 第10圖 簡單説明】 •係為本發明之具有自動鉗位預充電功能的定電流 驅動電路裝置之第一較佳實施例。 /，U ，係為第1圖之電路裝置之驅動波形圖。 :係為本發明之具有自動鉗位預充電功能的定電流 驅動電路裝置之第二較佳實施例。 :係為本發明之具有自動鉗位預充電功能的定電流 驅動電路裝置之第三較佳實施例。 机 係為第4圖之電路裝置之驅動波形圖。 係為本發明之具有自動鉗位預充電功能的定電流 驅動電路裝置之第四較佳實施例。 a :顯示採用習知驅動電路與本發明之驅動電路所得 之有機發光二極體接面電流波形的比較圖。 係顯示習知以定電流驅動之有機發光發射平面顯 示板與驅動電路的系統構造圖。 ’ 係習知有機發光發射平面顯示板之定電流驅動電 路裝置的電路圖。 ^ •係為第9圖之電路裝置的驅動波形圖。 .I- ^ Φ! (請先閲讀背面之注意事項再填寫本頁) 訂 #1. Μ氏張尺度適用中國國家標準（CNS ) A4規格(210X29秘f 五、發明説明（ 第1 1圖·係習知具有預充電功能之有機發光發射平面顯示 々 板之定電流驅動電路裝置的電路圖。 第1 2圖·係為第丨丨圖之電路裝置的驅動波形圖。 【圖號説明】 (1 1 )定電流驅動單元 (1 3 )有機發光二極體 (1 5 )多工器 (811)參考偏壓產生器 (8 2 1 )反相器 (8 4 )列择瞄移位暫存器 (請先閲讀背面之注意事項再填寫本頁) (10 ) ( 81 )行驅動電路 (12 )參考偏壓產生器 (1 4 ) ( 8 2 )列驅動電路 (4 1 )二極體陣列 (812 )定電流行驅動單元 (8 3 )行資料移位暫存器 【較佳具體實施例之詳細説明】 經濟部智慧財產局員工消費合作社印製 第1圖顯示有關本發明之具有自動鉗位預充電功能的 定電流驅動電路裝置之一較佳實施例，如圖所示，其行驅 動電路1 〇具有複數個定電流驅動單元丨丨，每一個定電流 驅動單元11係與參考偏壓產生器12形成電流鏡電路，該 足電流驅動單元1 1係由作為開關元件之PMOS電晶體^^?8 與作為電泥輸出元件之p Μ 0 S電晶體Μ P 〇連接而成，該電 晶體MPS源極連接電源VDD，汲極與電晶體Μρ〇之源極 相連，閘極則連接至輸入端COLI，該電晶體Μρ〇之閘極 與參考偏壓產生器12之偏壓輸出端VB相連，其没極連接 至輸出^ C 0 L 0。因此’當幸則入端COLI為低電壓準位 時’ PMOS電晶體MPS導通’而使PMOS電晶體ΜΡΟ由 輸出端C 0 L 0輸出定電流。 本紙張尺度適用中國國家標準（CNS ) Α4規格（210X299公羡） 493118 經濟部智慧財產局員工消費合作社印製 A7 五、發明說明（汉） 该足電流驅動單元丨丨中亦包含一作為放電元件之 NMOSt晶體MND，其源極連接至電晶體μ⑼之没極， 其沒極則連接放電端電壓Vdis，其中Vdis可為系統的灾電 位或依應用需求而所提供的—特定電壓源，而電晶體 MND之—閉極則連接至放電控制端叫，以當放電控制端 DIS為高電壓準位時，電晶體MND導通而進行放電。 而為提供自動純預充電之功能，本發明係:一作為 預充電元件之NMOS電晶體则丁與電流輸出電晶體 MPO並聯，而構成-源極賴器，亦即，電日日卩體则τ之 閘極與電晶體MPO之閘極相連而共同連接至偏壓輸出端 VB，電晶體MNST之源極與電晶體Mp〇之没極相連而业 同連接至輸出端C0L0，而電晶體MNST的没極血電晶f MPO的源極相連後再經由受輸入端c〇u控制的開關電日$ 體MPS而連接到電源vDD。 再併請參照第2圖所示之驅動波形，其中，在驅動電 路設計中，於每一條水平線的驅動前，ms信號會拉到 VDD-短暫時間（約10〜2〇M )，以便將對應的該行的有 機發光二極體13之接面電容與佈線雜散電容上的電荷作放 電，而消除殘影現象。之後，驅動電路之定電流驅動單元 11受對應的行資料控制來決定是否輸出電流，#是要輸出 電流，則PMOS電晶體MP0會輸出25μΑ定電流，但此時 所驅動的有機發％二極體i 3的端電壓仍為〇乂或低電壓甚 至是負電壓，而由於MNST的閘源極電壓％「偏壓vb_ 有機發光二極體13之端電壓V〇LED，故Vgs大於馗1^8丁的 本紙張尺度剌中國國家標準（CNSM4規格（2i〇 X 297这釐） .丨丨 1#裝---------tx-------- (請先閱讀背面之注意事項再填寫本頁) 493118 經濟部智慧財產局員工消費合作社印製 A7 五、發明說明（？） 臨界電壓Vth，因此預充電元件MNST會導通而以其汲極 源極電流IDS (正比於vGs_Vth之平方値）提供作為額外 的大電流對所驅動的有機發光二極體丨3作快速預充電，所 以端電壓會快速上升直到Vgs小於Vth，且考量列驅動電 路14之電壓降時，也就是當（v〇led+列驅動電路之電壓 降）>(VB-Vth )後，此預充電路即自動斷路，亦即此 預充電電路的自動鉗位發生作用而停止預充電動作，只剩 電晶體MP 0輸出2 5 μ A定電流來驅動對應之二極體丨3與雜 散電容。 在本實施例中，如第丨圖所示，更可在行驅動電路1〇 的參考偏壓產生器12之偏壓輸出端VB與各定電流驅動單 元1 1的電晶體MNST與MPO閘極間以一可由多工器丨5實 現之單刀雙投開關作偏壓控制，該多工器1 5之第一輸入端 11及第二輸入端12分別連接至偏壓輸出端vb及接地，而 輸出端Y則連接電晶體MNST與Mp〇之閘極，以當多工器 1 5义控制信號ID/VD=1時，多工器丨5之輸出端γ切換連 接至第一輸入端11，而使各定電流驅動單元丨丨的電晶體 MNST閘極連結到偏壓輸出端VB，此時之電路組態與前 一實施例相同，係為定電流驅動模式，而當id/vd==〇 時，多工器15之輸出端γ係切換連接至第二輸入端12，各 定電流驅動單元1 1的電晶體MNS T與MPO之閘極連結到 地端（0V )，因此，電晶體MNST被強制關閉，而電晶 體MP 0被強制打開且變成一低電阻，故此驅動單元即轉 變成一定電壓驅動器，所以使用者可依其需要來選則本發 -------------------1—t--------- (請先閱讀背面之注意事項再填寫本頁)-、 1T # 1. Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs 493118 A7 B7 V. Description of the invention (6) Since the invention has a novel structure, can provide industrial use, and does have selective effects, it has applied for a patent in accordance with the law. In order to enable your review committee to further understand the structure, characteristics and purpose of the present invention, a detailed description of the drawings and preferred embodiments is attached as follows: 后 After printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs [Figure] Figure 1 Figure 2: Figure 3: Figure 4: Figure 5: Figure 6: Figure 7 Figure 8: Figure 9 Brief Explanation of Figure 10] • This is the automatic clamp with the invention The first preferred embodiment of the constant current driving circuit device with bit precharge function. /, U are driving waveform diagrams of the circuit device in FIG. 1. : This is the second preferred embodiment of the constant current driving circuit device with automatic clamping pre-charging function of the present invention. : This is the third preferred embodiment of the constant current driving circuit device with automatic clamping precharge function of the present invention. The machine is the driving waveform diagram of the circuit device in Figure 4. It is the fourth preferred embodiment of the constant current driving circuit device with automatic clamping precharge function of the present invention. a: A comparison diagram showing a current waveform of an organic light emitting diode junction obtained by using a conventional driving circuit and the driving circuit of the present invention. It is a system structure diagram showing a conventional organic light-emitting emission flat display panel and driving circuit driven by a constant current. ′ Is a circuit diagram of a constant current driving circuit device of a conventional organic light emitting flat display panel. ^ • This is the driving waveform diagram of the circuit device in Figure 9. .I- ^ Φ! (Please read the precautions on the back before filling this page) Order # 1. The M's scale is applicable to the Chinese National Standard (CNS) A4 specification (210X29 secret f. Description of the invention (Figure 1 1 · It is a circuit diagram of a constant current driving circuit device of a conventional organic light emitting flat display panel with a pre-charging function. Fig. 12 is a driving waveform diagram of the circuit device of Fig. 丨 丨. [Illustration of the drawing number] (1 1) Constant current driving unit (1 3) Organic light emitting diode (1 5) Multiplexer (811) Reference bias generator (8 2 1) Inverter (8 4) Column shift register (Please read the precautions on the back before filling this page) (10) (81) Row drive circuit (12) Reference bias generator (1 4) (8 2) Column drive circuit (4 1) Diode array ( 812) Constant current row drive unit (83) Row data shift register [Detailed description of the preferred embodiment] Printed by the Consumer Cooperative of Intellectual Property Bureau of the Ministry of Economic Affairs. Figure 1 shows the invention with automatic clamping A preferred embodiment of the constant current driving circuit device with a precharge function, as shown in the figure, the row driving circuit 1 has There are several constant current drive units. Each constant current drive unit 11 and a reference bias generator 12 form a current mirror circuit. The full current drive unit 11 is composed of a PMOS transistor as a switching element. The pM 0 S transistor M P 〇, which is an output element of the transistor, is connected. The source of the transistor MPS is connected to the power source VDD, the drain is connected to the source of the transistor Mρ〇, and the gate is connected to the input terminal COLI. The gate of the transistor Mρ〇 is connected to the bias output terminal VB of the reference bias generator 12 and its non-pole is connected to the output ^ C 0 L 0. Therefore, 'Fortunately, when the input terminal COLI is at a low voltage level' PMOS The transistor MPS is turned on, so that the PMOS transistor MP0 outputs a constant current from the output terminal C 0 L 0. This paper size applies the Chinese National Standard (CNS) Α4 specification (210X299 public envy) 493118 Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs A7 V. Description of the invention (Chinese) The full-current drive unit also includes an NMOSt crystal MND as a discharge element, the source of which is connected to the non-electrode of the transistor μ⑼, and the non-electrode is connected to the discharge terminal voltage Vdis, where Vdis can be The catastrophic potential of the system or the specific voltage source provided according to the application needs, and the closed-pole of the transistor MND is connected to the discharge control terminal, so that when the discharge control terminal DIS is at a high voltage level, the transistor MND is turned on In order to provide the function of automatic pure pre-charging, the present invention is: a NMOS transistor as a pre-charging element is connected in parallel with the current output transistor MPO to form a source-source device, that is, electricity On the sundial body, the gate of τ is connected to the gate of transistor MPO and is commonly connected to the bias output terminal VB. The source of transistor MNST is connected to the pole of transistor Mp〇 and is also connected to the output terminal C0L0. The source of the non-electrode blood crystal f MPO of the transistor MNST is connected to the power source vDD via the switch MPS controlled by the input terminal c0u. Please also refer to the driving waveform shown in Figure 2. In the design of the driving circuit, before each horizontal line is driven, the ms signal will be pulled to VDD- short time (about 10 ~ 20M) in order to respond to The charge on the junction capacitance and the stray capacitance of the wiring of the organic light emitting diode 13 in this row is discharged to eliminate the afterimage phenomenon. After that, the constant current driving unit 11 of the driving circuit is controlled by the corresponding row data to determine whether to output the current. # Is to output the current, then the PMOS transistor MP0 will output a constant current of 25 μA, but the organic light source driven at this time is a two-pole The terminal voltage of the body i 3 is still 0 volts or low voltage or even negative voltage, and because the gate-source voltage of the MNST is "biased vb_ the terminal voltage of the organic light emitting diode 13 VOLED, so Vgs is greater than 馗 1 ^ The paper size of this paper is 剌 Chinese national standard (CNSM4 specification (2i〇X 297 centimeters). 丨 丨 1 # pack --------- tx -------- (Please read the back first Note: Please fill in this page again.) 493118 Printed by A7, Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs. 5. Description of the invention (?) The threshold voltage Vth, so the pre-charging element MNST will be turned on and its drain source current IDS (is proportional to The square of vGs_Vth 値) provides fast pre-charging of the organic light-emitting diode 3 driven as an extra large current, so the terminal voltage will rise rapidly until Vgs is less than Vth, and when the voltage drop of the column driving circuit 14 is considered, Is when (v〇led + column drive circuit voltage drop > After (VB-Vth), the pre-charging circuit will be automatically disconnected, that is, the pre-charging of the pre-charging circuit will stop and the pre-charging operation will be stopped. Only the transistor MP 0 will output 2 5 μA constant current to drive. Corresponding to the diode 3 and the stray capacitance. In this embodiment, as shown in FIG. 丨, the bias output terminal VB and the constant currents of the reference bias generator 12 of the row driving circuit 10 can be further used. The transistor MNST and the MPO gate of the driving unit 11 are controlled by a single-pole double-throw switch that can be implemented by a multiplexer 5 and the first input terminal 11 and the second input terminal 12 of the multiplexer 15 Connected to the bias output terminal vb and ground respectively, and the output terminal Y is connected to the gate of the transistor MNST and Mp〇, so that when the multiplexer 15 control signal ID / VD = 1, the multiplexer 5 The output terminal γ is switched to the first input terminal 11 so that the transistor MNST gate of each constant current driving unit 丨 丨 is connected to the bias output terminal VB. At this time, the circuit configuration is the same as that of the previous embodiment. Constant current drive mode, and when id / vd == 〇, the output terminal γ of the multiplexer 15 is switched to the second input terminal 12, each The transistor MNS T of the constant current driving unit 11 and the gate of the MPO are connected to the ground terminal (0V). Therefore, the transistor MNST is forcibly turned off, and the transistor MP 0 is forcibly turned on and becomes a low resistance. Therefore, the driving unit That is, it becomes a certain voltage driver, so the user can choose the book according to his needs .------------------- 1—t --------- (Please read the notes on the back before filling this page)
本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297&爱） 經濟部智慧財產局員工消費合作社印製 A7 五、發明說明（） 明之驅動器的工作模式，而得到最低成本最多功效的目 的。 第3圖所不係為本發明之另一個實施例，其與前一個 實施例原理冗全相同，但把pM〇s開目元件鮮§的連接改 成MNST的源極與MP0的汲極到驅動輸出端之間；亦即， 電晶體MPO之源極連接電源％，其沒極與Mps電晶體 =源極相連，閘極則連接至參考偏壓產生器12之偏壓輸出 端VB，電晶體MPS之閘極連接至輸入端c〇li，其汲極作 為定電流之輸出端C0L0 ;電晶體MND之源極連接至電 曰口把MPS之汲極，其汲極連接放電端電壓，其閘極 作為放電控制端DIS，電晶體MNST之源極係經由該電晶 體MPS而連接到該輸出端c〇L〇，其汲極與輸出電晶體 MPO的源極共同連接至電源Vdd。如此亦可得到與前一個 實施例相同的功用與效能。 又，於本發明气其他較佳實施例中，係以採用二極體 陣列而提供自動鉗位預充電之功能，參照第4圖所示之一 較佳實施例，於行驅動電路之定電流行驅動單元11中，相 似於珂述之實施例，其亦包含有作為開關元件iPMos電 日9 to Μ P S、作為電流輸出元件之p Μ 〇 S電晶體Μ ρ 〇、及 作為放電元件iNMOS電晶體“^〇，pM〇s電晶體Μρ〇 的閘極係連接於一參考偏壓產生器丨2之偏壓輸出端VB， 以形成為一定電流輸出元件，而與前述實施例不同之處在 於使用一二極體陣列4丨與電晶體MP 〇並聯，其中，二極 體陣列4 1之陽極係連接於電晶體Mp〇的汲極，而陰極 —.—-------裝--------訂--------- (請先閲讀背面之注意事項再填寫本頁)This paper size applies the Chinese National Standard (CNS) A4 specification (210 X 297 & love) printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs, printed A7. 5. Description of the invention () The working mode of the driver is the lowest cost and most effective. . Figure 3 does not show another embodiment of the present invention, which has the same principle as the previous embodiment, but changes the connection of pM0s eye opening element to the source of MNST and the drain of MP0. Between the drive output terminals; that is, the source of the transistor MPO is connected to the power source%, its pole is connected to the Mps transistor = source, and the gate is connected to the bias output terminal VB of the reference bias generator 12; The gate of the crystal MPS is connected to the input terminal c0li, and its drain is used as the constant current output terminal C0L0; the source of the transistor MND is connected to the electric port, and the drain of the MPS is connected to the drain. The gate serves as the discharge control terminal DIS. The source of the transistor MNST is connected to the output terminal c0L0 via the transistor MPS. The drain and the source of the output transistor MPO are connected to the power source Vdd in common. In this way, the same functions and effects as those of the previous embodiment can be obtained. Also, in other preferred embodiments of the present invention, a diode array is used to provide the function of automatic clamping pre-charging. Referring to a preferred embodiment shown in FIG. The popular drive unit 11 is similar to the embodiment described by Cos. It also includes iPMos 9-MPS as a switching element, pMOS transistor Mρ as a current output element, and iNMOS as a discharge element. The gate of the crystal "^ 〇, pM〇s transistor Mρ〇 is connected to the bias output terminal VB of a reference bias generator 2 to form a certain current output element. The difference from the previous embodiment is that A diode array 4 丨 is used in parallel with the transistor MP0. The anode of the diode array 41 is connected to the drain of the transistor Mp〇, and the cathode is connected to the transistor Mp0. ------- Order --------- (Please read the notes on the back before filling this page)
493118 Α7 Β7 五、發明說明（"） 接於電晶體MPO的源極後再與受輸入端c〇u控制的開關 電晶體MPS串聯。 (請先閱讀背面之注意事項再填寫本頁) 薇二極體陣列4 1係包含至少一個二極體，於本實施例 中，係以二個串接之二極體表示，而在CMOS製程裡，如 圖所7JT，建構本案所描述的二極體陣列4丨的最佳實施方法 為將NMOS或PMOS作二極體連接而應用於本案之電路。 併凊參考第5圖的驅動波形，當驅動電路之定電流驅 動單70 1 1受對應的行資料控制來決定是否輸出電流，若是 要輸出電流，則PM0S電晶體MPO會輸出25μΑ定電流， 但此時所驅動的有機發光二極體丨3的端電壓仍為〇ν或低 電壓甚至是負電壓，因此，由PM〇s電晶體MpSTi& MP S T2所構成的二極體陣列會導通而提供額外的大電流 對所驅動的〇 L E D 1 3作快速預充電，所以端電壓會快速上 升直到二極體陣列41的端電壓Vds mp〇小於二極體陣列41 的切入電壓後，即自動斷開，此預充電路即自動斷路，也 就是此預充電電路的自動鉗位發生作用而停止預充電動 作。只剩電晶體ΜΡ0輸出25 μΑ定電流來驅動對應之二極 體1 3與雜散電容。 經濟部智慧財產局員工消費合作社印製 再μ參照弟4圖所示’本實施例亦可在行驅動電路1 〇 的參考偏壓產生器12之偏壓輸出端VB與各定電流驅動單 元11的電晶體MNST與ΜΡ0閘極間以一由多工器15實現 之單刀雙投開關作偏壓控制，而使電路組態成為定電流驅 動模式’或定電壓驅動模式，故使用者可依其需要來選則 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297 δΐΤ 493118 經濟部智慧財產局員工消費合作社印製 A7 五、發明說明（P ) 本發明之驅動器的工作模式，而得到最低成本最多功效的 目的。 第6圖所7JT為另-個實施例，其與前一個實施例原理 凡王相同，但把PMOS開關元件]^?8的連接改成二極體陣 列41的陽極與ΜΡΟ的没極到驅動輸出端c〇L〇之間，亦 即，電晶體MPO之源極連接電源％，沒極與電晶體 MPS之源極相連，閘極則連接至參考偏壓產生器。之偏 壓輸出’黾晶體mps之閘極連接至輸入端c〇Li，其 ;及極作為定電流之輸出端c〇L〇，·電晶體圓〇之源極連 接至電晶體MPS之汲極，其汲極連接放電端電壓， 其閘極作為放電控制端DI s，二極體陣列4丨之陰極連接電 晶體MPO之源極，陽極則連接電晶體Mp〇之没極。如此 亦可得到與前一個實施例相同的功用與效能。 由以上之説明可知，本發明之具有自動鉗位預充電功 旎的定電流驅動電路裝置係以一個NM〇s元件mnst構成 一源極追隨器，其與定電流輸出元件Mp〇並聯以作為預 充電7L件，因此能自動依據〇LED二極體端電壓大小來調 整預无電流大小，並自動鉗位到VB_vth—MNST以避免端 電壓被預充得過高；或是以二極體陣列與定電流輸出元件 MPO並聯以作為預充電元件，其能自動依據〇led二極體 端電壓大小來調整預充電流大小，並且在Vds_mp〇小於二 極體陣列的切入電壓後，即自動斷開，以避免端電壓被預 充得過高，不需要獨立的預充電控制信號，所以得以完全 避免上述傳統電路的缺點。第7圖即顯示採用兩種習知驅 t紙張尺度適用中家標準(CNS)A4規格⑽X 297达釐)----- I I I I I — — — — — — I— ·1111111 (請先閒讀背面之注意事項再填寫本頁) 493118 A7 B7 五、發明說明（/3> ) 動電路（無預充電及有預充電） 、 / 所传< 0 L E D接面雷、、云 形（分別以（A )及（B )表$、t * 私机攻 、 、 ^ )與本發明之驅動電路户斥 得之0 L E D接面電流波形的比輕 斤 所述之功效。 運成 综上所陳，本發明無論就目的、手段及功效，在在均 顯TF其迥異於習知技術之特徵，為有機發光發射平面顯示 板之驅動電路之製作上的一大突破，誠為一具產業上利用 性、新穎性及進步性之發明，應符合專利申請要件，爰依 法提出申請。 I ^1 ϋ ϋ I- I ϋ -ϋ ϋ n · ϋ ϋ ϋ I I ϋ ϋ 一·0, I ϋ ϋ ϋ ϋ ϋ ϋ ϋ I Γ请先閱讀背面之注意事項再填寫本頁} 經濟部智慧財產局員工消費合作社印製 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 2971 公釐）493118 Α7 Β7 5. Description of the invention (") Connected to the source of the transistor MPO and then in series with the switching transistor MPS controlled by the input terminal c0u. (Please read the precautions on the back before filling out this page) The Wei Diode Array 4 1 contains at least one diode. In this embodiment, it is represented by two diodes connected in series. Here, as shown in Figure 7JT, the best implementation method for constructing the diode array 4 丨 described in this case is to apply NMOS or PMOS as a diode connection and apply it to the circuit of this case. With reference to the driving waveform in Fig. 5, when the constant current driving unit 70 1 1 of the driving circuit is controlled by the corresponding row data to determine whether to output the current, if it is to output the current, the PM0S transistor MPO will output a constant current of 25 μA, but At this time, the terminal voltage of the organic light-emitting diode 3 being driven is still 0V or low voltage or even negative voltage. Therefore, the diode array composed of PMMOS transistor MpSTi & MP S T2 will be turned on and Provide extra high current for fast pre-charging of the driven OLED 13, so the terminal voltage will rise rapidly until the terminal voltage Vds mp of the diode array 41 is less than the cut-in voltage of the diode array 41, and it will automatically turn off. On, the pre-charging circuit is automatically disconnected, that is, the pre-charging circuit of the pre-charging circuit acts to stop the pre-charging action. Only the transistor MP0 outputs a constant current of 25 μA to drive the corresponding diodes 13 and stray capacitance. Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs and referring to the figure 4 'this embodiment can also be used in the bias output terminal VB of the reference bias generator 12 of the row drive circuit 10 and each constant current drive unit 11 The single-pole double-throw switch implemented by the multiplexer 15 is used as the bias control between the transistor MNST and the MP0 gate, so that the circuit configuration becomes a constant current drive mode or a constant voltage drive mode, so the user can Need to choose this paper size applies the Chinese National Standard (CNS) A4 specification (210 X 297 δΐΤ 493118 Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs, printed A7 V. Invention Description (P) The working mode of the driver of the invention The purpose of the lowest cost and the most effective effect. 7JT in FIG. 6 is another embodiment, which has the same principle as the previous embodiment, but the connection of the PMOS switching element] ^ 8 is changed to the anode of the diode array 41. Between the pole of the MPO and the driving output terminal c0L0, that is, the source of the transistor MPO is connected to the power source%, the pole is connected to the source of the transistor MPS, and the gate is connected to the reference bias generator. . Of the bias The gate of the 黾 crystal mps is connected to the input terminal c0Li, which is the constant current output terminal c0L〇, the source of the transistor circle 0 is connected to the drain of the transistor MPS, whose drain The electrode is connected to the discharge terminal voltage, and its gate is used as the discharge control terminal DI s, the cathode of the diode array 4 丨 is connected to the source of the transistor MPO, and the anode is connected to the terminal of the transistor Mp〇. The same function and efficiency as in the embodiment. As can be seen from the above description, the constant current driving circuit device with an automatic clamping precharge function of the present invention uses an NMs element mnst to form a source follower, which is related to the constant current. The output element Mp〇 is connected in parallel as a pre-charged 7L piece, so it can automatically adjust the pre-current level according to the voltage of the LED diode terminal, and automatically clamp it to VB_vth-MNST to avoid the terminal voltage being precharged too high; Or use a diode array in parallel with the constant current output element MPO as a pre-charging element, which can automatically adjust the pre-charge current according to the voltage of the terminal end of the LED, and it is smaller than the cut-in of the diode array at Vds_mp〇. Voltage After that, it is automatically disconnected to avoid the terminal voltage being precharged too high, and no independent precharge control signal is needed, so the disadvantages of the above conventional circuit can be completely avoided. Figure 7 shows the use of two conventional drive paper Standards are applicable to the Chinese Standard (CNS) A4 specification (X 297 Dali) ----- IIIII — — — — — — I — 1111111 (please read the precautions on the reverse side before filling out this page) 493118 A7 B7 V. Description of the invention (/ 3 >) moving circuit (without pre-charging and pre-charging), / Passed < 0 LED interface mine,, cloud shape (respectively (A) and (B) table $, t * Private machine The efficiency of the LED interface current waveform obtained by the driver circuit of the present invention is less than that described above. In summary, the present invention, regardless of the purpose, means, and effect, shows the characteristics of TF, which is very different from the conventional technology, and is a major breakthrough in the production of driving circuits for organic light emitting flat display panels. For an industrially usable, novel and progressive invention, it should meet the requirements of patent application and file an application according to law. I ^ 1 ϋ ϋ I- I ϋ -ϋ ϋ n · ϋ ϋ ϋ II ϋ ϋ 1 · 0, I ϋ ϋ ϋ ϋ ϋ ϋ ϋ ϋ I Γ Please read the notes on the back before filling out this page} Intellectual Property of the Ministry of Economic Affairs The paper size printed by the Bureau ’s Consumer Cooperative is applicable to China National Standard (CNS) A4 (210 X 2971 mm)