1224471 五、發明說明（1) ' "~~— 【發明所屬之技術領域】 杈擬有機發光單之老化程度，俾使有機發光顯示面柘 維持穩定之發光亮度，不受元件老化之影響。 本贺明係有關於平面顯示面板，特別是有關於〜 機發光顯示面板及其回授控制裝置，可透過回授種有 搭 Μ 古拖 1 士 HH v i 、一 .. 二制幾_ f 【先前技術】 有機發光二極體（Organic Light Emitting Di% OLED)顯示面板，乃是一種利用有機化合物作為笋Q二； 的薄膜積層型顯示器，具有面發光、自發光、薄X型、材^料 輕^低驅動電壓等優點。儿即顯示面板依照其驅動方J仃 區分成主動式（active matrix)與被動式兩種，其中/可 式0LED(AM-0LED)面板大多是使用薄膜電晶體（tMn f丨h transistor ; TFT)來驅動〇LED進行顯示。 、第1圖顯。示有機發光二極體（〇LED)顯示面板之結構圖 (以4個顯不單元i6a〜16d為例），掃描解碼器（scanning decoder ) 1 2驅動掃描線2〇a〜2〇b上的掃描訊號；資料驅動 器（data driver ) 10驅動資料線丨以〜丨8b上的資料訊號； ，數有機發光顯不單元1 6 a〜1 6 d分別置於掃描線與資料線 =錯處，並功能性地耦合至其中一條掃描線以及其中一條 貝料線，透過掃描線提供掃描訊號而定址有機發光顯示單 元，使資料線之資料訊號能寫入有機發光顯示單元 16a〜16d 中。 第2圖為習知〇leD顯示單元之結構圖，在此以有機發1224471 V. Description of the invention (1) '" ~~ — [Technical field to which the invention belongs] The degree of aging of the pseudo-organic light-emitting sheet, so that the organic light-emitting display surface 柘 maintains stable luminous brightness, and is not affected by the aging of components. Ben Heming is about flat display panels, especially about the machine-emitting display panel and its feedback control device, which can be seeded with Μ 古 托 1 士 HH vi, one .. two systems _ f 【 Previous technology] Organic Light Emitting Di% OLED display panel is a thin film multilayer display using organic compounds as the Q2; has surface-emitting, self-emitting, thin X-shaped, material Light weight and low driving voltage. The display panel is divided into two types, active matrix and passive, according to its driver J 仃. Among them, most of the 0 LED (AM-0LED) panels use thin film transistors (tMn f 丨 h transistor; TFT). The LED is driven to display. Figure 1 shows. Shows the structure diagram of the organic light emitting diode (〇LED) display panel (take 4 display units i6a ~ 16d as an example), the scanning decoder 1 2 drives the scanning lines 2a ~ 20 Scanning signal; data driver (data driver) 10 drives the data line to the data signal on ~ 8b;, the number of organic light-emitting display units 1 6 a to 1 6 d are placed on the scan line and data line = wrong, and function It is coupled to one of the scanning lines and one of the shell material lines, and the organic light-emitting display unit is addressed by providing a scanning signal through the scanning line, so that the data signals of the data lines can be written into the organic light-emitting display units 16a-16d. Figure 2 shows the structure of a conventional OLED display unit.
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0632-8067twF(nl) ： AU91001 - Brad Lm.ptd 第6頁 1224471 五、發明說明（3) ，老化現象所造成臨限電壓4及叽肋28a跨壓％⑽之挣‘光：Ϊίΐ得驅動電流L下降，而造成0LED顯示面：之 【發明内容】 有鑑於此，本發明之一目的 置，用以穩定流經有機發光單元 電晶體及OLED之元件老化所造成 命縮短之問題。 本發明之另一目的為提出一 用上述回授控制裝置，使驅動上 〇LED之電壓源之一，能隨著元件 俾以增進上述有機發光顯示面板 為達成本發明之目的，本發 適用於有機發光單元，上述有^ 電壓節點和一第二電壓節點之間 發光二極體（OLED)串接一第一電 裝置，包括：一模擬裝置具有一 體，上述第一和第二OLED與上述 相同製程條件製作而得，用以反 化程度；以及，一定電流源，耦 與上述第二電壓節點，用以使上 保持一定，藉此使上述第二節點 單元之老化程度而降低。 為提出一種回 之電流，以避 之發光亮度衰 種有機發光顯 述有機發光顯 之老化程度而 之效能表現及 明提出之回授 發光單元係設 ，且至少包括 晶 體 授控制裝 免因為驅動 減及使用壽 示面板，應 示面板中 進行補償， 使用壽命。 控制裴置， 置於一第一 一第一有機 第一〇LED串接 第一和第二電 映上述有機發 接上述模擬裝 述第二OLED所 之電壓隨著上 本發明之回授控制 弟二電晶 晶體係使用 光單元之老 置之另一端 流通之電流 述有機發光0632-8067twF (nl): AU91001-Brad Lm.ptd Page 6 1224471 V. Description of the invention (3), the threshold voltage 4 caused by the aging phenomenon and the transversal pressure of the rib 28a %% are earned. Light: the drive current L decreases, resulting in 0LED display surface: [Summary of the Invention] In view of this, one object of the present invention is to stabilize the problem of shortening the life caused by the aging of the organic light-emitting unit transistor and the OLED element. Another object of the present invention is to propose the use of the above-mentioned feedback control device so that one of the voltage sources for driving the LED can increase the organic light-emitting display panel along with the components to achieve the purpose of the invention. The present invention is applicable to An organic light-emitting unit, in which a light-emitting diode (OLED) is connected in series between a voltage node and a second voltage node, and includes a first electrical device, including: an analog device having an integrated body, and the first and second OLEDs are the same as above. Manufactured by process conditions to reverse the degree; and a certain current source is coupled to the second voltage node to keep the upper constant, thereby reducing the aging degree of the second node unit. In order to propose a return current, in order to avoid the degradation of luminous brightness, the organic light-emitting device displays the performance of the organic light-emitting device, and the performance of the light-emitting unit and the feedback light-emitting unit are provided. And use the life display panel, compensation should be displayed in the panel, the service life. The control unit is placed in a first, first, first, organic, 10 LED, connected in series with the first and the second image, and the voltage of the above organic transmitter and the second analog OLED is controlled by the feedback controller of the present invention. The two-electrode crystal system uses the current flowing through the other end of the old unit of the light unit to describe organic light emission.
0632-編wF(nl):細_ ;細 第7頁 1224471 五 發明說明（4) 一為達成本發明之另—^ ^ ^ :f板主要係應用上述回拽控制ΐ =明J出之有機發光顯 ^早7L，每一上述有機發 -衣置，包括：複數有機菸 即點之間；回授控制裴置t:係汉置於第一和第二電 程度，並且使上述第二節點^亡?5機發光單元之老化 之老化程度而降低。 電壓隨著上述有機發光單亓 1 ^Lj 【貫施方式】 為使本發明之上述目 * 下文特舉較佳實施例，i配丄戶 點能更明顯易懂， 下。 σ所附圖式，作詳細說明如 芩照第2圖及其對應之推 .K ( VG - Vss 一 V0LED - Vth )2 ; 電晶體24a之電流Ids其值係為^敘述可知，流經上述驅動0632-Edition wF (nl): Fine _; Fine Page 7 1224471 Five invention descriptions (4) One is to achieve another cost invention-^ ^ ^: f board is mainly used to apply the above pull back control ΐ = Ming J organic The light-emitting display is as early as 7L, and each of the above organic hair-clothing devices includes: a plurality of organic cigarettes are between points; feedback control is set to t: the system is placed at the first and second electrical levels, and the above-mentioned second node ^ The aging degree of the light emitting unit of the 5 machine is reduced. The voltage follows the above organic light-emitting diode 1 ^ Lj [implementation method] In order to make the above purpose of the present invention * The preferred embodiment is exemplified below, the i-distribution site can be more clearly understood. σ is described in detail in the drawing, as shown in Figure 2 and its corresponding deductions. K (VG-Vss-V0LED-Vth) 2; The current Ids of the transistor 24a is ^ The description shows that it flows through the above drive
Lds ---- LU / ， 所以，有機發光單元老化後 驅動電流1下降。目此，本發Γ主要ΥΛ加確實會造成 £ ' ^VSS Pt tV0LED ^Vth ^ ^ V〇LED + Vth成為一定值，如此 SS + 值，則OLED之亮度就不會上^電机1ds就能保持複始設定 第4圖顯示本發明之回授控 元之示意圖。 衣置應用於有機發光單 本發明之回授控制裝置4〇，用以 單元…之電流，上述有機發光單元16:係；；光 ‘之-第-電壓節點和具有電壓、之一第二電壓節：：壓 1 第8頁 0632-8067twF(nl) ； AU91001 ： Brad Lin.ptd 1 1224471 五、發明說明（5) 間，有機發光單元1 6 a之結構及運作已在上文配合第2圖詳 細說明過在此不再予以贅述。第4圖中，上述回授控制裝 置40 ’包括：一模擬裝置30，以及一定電流源34。 上述模擬裝置30包括一有機發光二極體⑶LED) 3〇a串 接一電晶體30b，上述發光單元1 6a中之〇LED 28a、電晶體 24a與模擬裝置30中之〇LED 30a、電晶體3〇b係使用相同製 程條件製作而得之M0S電晶體和0LED，例如為α — si TFT製 程但不限定於此。 上述模擬裝置3 0耦接於上述第三節點（具有電壓'η)和 上述定電流源3 4之間。值得注的是，上述電晶體3 〇 b之閘 極接收一既定偏壓或電壓應力（stress)Vst⑽，而驅動上述 OLED 30a流通電流L，藉以反映上述有機發光單元16&中之 電晶體24a及OLED 28a之老化程度。 由於上述定電流源34耦接上述模擬裝置3〇，上述〇LED 通電流11會成為既定之初始電流1，亦即定電流源％ =In”流，而節點電壓' ’自然地感應出電晶體_ η' ΐ電,1時所對應之電位。在長時間的操作 又丨y、電晶體3〇b和OLED 30a老化之影響，電晶 :第A二:和0UD心之物 :Γ' Λ / i; ?1 ^ ^m ^ 1 ^ 1 ^ ^ ^ ^ ^ ^ f 點電壓Vx下降（如第7β圖所示）。本發明 二二…、電壓Vx耦接給上述第二電壓節點（vss )， 電壓（vss)確實會隨著節點電壓、一 ”’、 示）。藉此方式，Vss能夠隨著降(如第7C圖所 」I現者v〇LED和vth的增加而減少，達到Lds ---- LU /, so the driving current 1 decreases after the organic light-emitting unit is aged. At this point, the main Γ of this issue will indeed cause £ '^ VSS Pt tV0LED ^ Vth ^ ^ V〇LED + Vth becomes a certain value, so SS + value, the brightness of the OLED will not be ^ motor 1ds can Keep Resetting Figure 4 shows a schematic diagram of the feedback control unit of the present invention. The device is applied to an organic light-emitting unit of the feedback control device 40 of the present invention, which is used to unite the current of the above organic light-emitting unit 16: system; the light-of-the-first-voltage node and a voltage having one of the second voltage Section :: Press 1 Page 832-8067twF (nl); AU91001: Brad Lin.ptd 1 1224471 V. Description of the Invention (5) The structure and operation of the organic light-emitting unit 16a have been matched with the above figure 2 The detailed description will not be repeated here. In FIG. 4, the feedback control device 40 ′ includes an analog device 30 and a certain current source 34. The simulation device 30 includes an organic light emitting diode (LED) 30a, a transistor 30b is connected in series, the LED 28a in the light-emitting unit 16a, the transistor 24a and the LED 30a in the simulation device 30, and the transistor 3 Ob is a MOS transistor and an 0LED manufactured using the same process conditions, for example, it is an α-si TFT process, but it is not limited to this. The analog device 30 is coupled between the third node (having a voltage 'η) and the constant current source 34. It is worth noting that the gate of the transistor 30b receives a predetermined bias voltage or voltage stress Vst⑽, and drives the OLED 30a to flow a current L, thereby reflecting the transistor 24a of the organic light emitting unit 16 & Degree of aging of OLED 28a. Since the above-mentioned constant current source 34 is coupled to the above-mentioned analog device 30, the above-mentioned LED on-current 11 will become the predetermined initial current 1, that is, the constant current source% = In ”current, and the node voltage '' naturally induces the transistor _ η 'ΐ, the potential corresponding to 1. At long-term operation, the effects of y, transistor 30b, and OLED 30a aging, transistor: A2: and 0UD heart: Γ' Λ / i;? 1 ^ ^ m ^ 1 ^ 1 ^ ^ ^ ^ ^ ^ ^ f The voltage Vx drops (as shown in Figure 7β). In the present invention, the voltage Vx is coupled to the second voltage node (vss ), The voltage (vss) will indeed follow the node voltage, a "',"). In this way, Vss can decrease as the voltage (LED and vth) increases as shown in Figure 7C, reaching
1224471 圖式簡單說明 第1圖顯示OLED顯示面板之結構圖。 第2圖顯示習知OLED顯示單元之結構圖。 第3圖顯示0LE D之跨壓與電晶體之臨限電壓隨使用時 間加長而增加之關係圖。 第4圖顯示本發明之回授控制裝置應用於有機發光單 元之示意圖。 第5圖 顯 示 本 發明應用 穩 壓 電路 之 系 統 示 意 圖 〇 第6圖 顯 示 應 用本發明 之 回 授控 制 裝 置 之 OLED 顯 示 面 板c ) 第7A〜 7C 圖 顯 示 V〇LED + Vth Λ Vx 及Vss 對 應 使 用 時 間 之 關 係 圖c ) 【符號說明】 1 0〜掃描解碼器； 1 2〜貧料驅動裔， 14〜OLED顯示面板； 16a-16d〜有機發光顯示單元； 18a_18b〜掃描線； 20a-20b〜資料線； 22a〜切換電晶體； 2 4 a〜驅動電晶體； 26 a〜電容； 2 8 a〜有機發光二極體； 3 0〜模擬裝置；1224471 Brief Description of Drawings Figure 1 shows the structure of an OLED display panel. FIG. 2 shows a structure diagram of a conventional OLED display unit. Figure 3 shows the relationship between the voltage across 0LE D and the threshold voltage of the transistor that increases with time. Fig. 4 shows a schematic diagram of applying the feedback control device of the present invention to an organic light emitting unit. Figure 5 shows a schematic diagram of a system using a voltage stabilization circuit of the present invention. Figure 6 shows an OLED display panel using the feedback control device of the present invention. C) Figures 7A to 7C show V〇LED + Vth Λ Vx and Vss corresponding use time. Relationship diagram c) [Symbol description] 1 0 ~ scan decoder; 12 ~ lean driver, 14 ~ OLED display panel; 16a-16d ~ organic light-emitting display unit; 18a_18b ~ scan line; 20a-20b ~ data line 22a ~ switching transistor; 2a ~ driving transistor; 26a ~ capacitor; 2a ~ organic light emitting diode; 30 ~ analog device;
0632-8067twF(nl) ： AU91001 ： Brad Lm.ptd 第11頁 1224471 圖式簡單說明 30a〜OLED ; 30b〜電晶體； 3 2〜穩壓電路； 3 4〜固定電流源； 4 0〜回授控制裝置； 4 2〜放大器； 44〜雙載子接面電晶體； 4 6〜電阻器。0632-8067twF (nl): AU91001: Brad Lm.ptd Page 11 1224471 The diagram briefly illustrates 30a ~ OLED; 30b ~ transistor; 3 2 ~ voltage regulator circuit; 3 4 ~ fixed current source; 4 0 ~ feedback control Device; 4 2 ~ amplifier; 44 ~ bipolar junction transistor; 4 6 ~ resistor.
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