200844948 九、發明說明： 【發明所屬之技術領域】 本發明係有關一種被動矩陣式有機發光二極體 (PM0LED)顯示器面板，特別是關於一種改善PM0LED顯示 器面板壽命及降低消耗功率的電路。 【先前技術】 有機發光二極體（0LED)顯示器具有許多超越其他平 面顯示器（FPD)的優點，包括消耗功率低、高亮度及容易 製造等，但其使用壽命卻一直無法達到其他平面顯示器的 水準，因此改善0LED顯示器面板壽命成為一個主要的課 題。0LED顯示器根據其晝素陣列的結構可分為主動矩陣式 有機發光二極體（AM0LED)顯示器面板及被動矩陣式有機 發光二極體（PM0LED)顯示器面板二類，在美國專利第 6, 023, 259號中揭露一種改善AM0LED壽命的驅動方法，但 卻一直沒有針對改善PM0LED顯示器面板壽命的方法被提 出。如第一圖所示，習知驅動PM0LED顯示器面板的方法 包括以行驅動器模組102及列驅動器模組104驅動一 PMOLED顯示器面板10 6，面板10 6包含WL。到WLm共m列， 每一列均具有η個畫素（Cell〇_WLi到CelhJLi)，藉由連 續掃描的方式提供驅動電流給面板106中的晝素，如第二 圖所示，面板106中的各列，被電壓源VDD不斷循序地驅 動且相鄰的兩列之間具有一時間間隔，根據顯示器面板 106商品化的畫面要求規格設定正常顯示時的驅動電流 6 200844948 I〇rg與其驅動週期以達到顯示的目的。此法導致PMOLED 顯示器面板的功率消耗無法降低及壽命無法提昇，因為對 面板106作不斷循序驅動及掃描，使得功率消耗無法降 低，且PM0LED的發光亮度與驅動電流成正比，如第三圖 所示，在容許範圍内提高驅動電流及驅動週期可得到較佳 的顯示品質，但PM0LED的壽命與驅動電流及使用時間的 乘積成負相關，因此為獲得較佳的顯示品質往往犧牲了 PM0LED的壽命且使得功率消耗無法降低。 因此，一種增加PM0LED顯示器面板壽命、減少消耗 功率且不導致顯示品質劣化的電路，乃為所冀。 【發明内容】 本發明的目的之一，在於提供一種改善PM0LED顯示 器面板壽命及降低消耗功率的電路。 根據本發明，一種改善被動矩陣式有機發光二極體顯 示器面板壽命及降低消耗功率的電路，包括對該有機發光 二極體顯示器面板中的畫素減少其驅動電流與縮短其驅 動週期二者至少其一。 【實施方式】 如第四圖所示，根據本發明，一種改善PM0LED顯示 器面板壽命及降低消耗功率的方法包括使用二個驅動器 板組’例如行驅動裔核組4 0 2及列驅動器模組4 0 4 ’以電 流驅動PM0LED顯示器面板406，面板406包含WL〇到WLm 7 200844948 共m列，每一列均具有η個畫素（CelloJLi到Celln_WLi)， 當PM0LED顯示器面板406在一些特定的狀態，例如待機 狀悲、螢幕保遵、顯不靜態晝面或晝面慢速變動時，選取 整個PM0LED面板406畫面中的區域408，不像面板406在 正常顯示時掃描面板406中的每一列並驅動每一列中的畫 素，僅藉由掃描面板406特定的列，例如區域408中的列 (WLj到WLh)，並驅動區域408中各列中的晝素，例如Cel U 到Cell· ’即可達成晝面顯示，此時藉由調整區域408中 該等晝素的驅動電流及其驅動週期，使該晝面的亮度、清 晰度等達到使用者視覺上可辨識的最低標準，以增加面板 406的壽命’此外，由於電壓源未對整個面板偏中 的列不斷地掃描，僅對區域408中的列進行掃描，亦達到 減少功率消耗的目的。200844948 IX. Description of the Invention: [Technical Field] The present invention relates to a passive matrix organic light emitting diode (PM0LED) display panel, and more particularly to a circuit for improving the lifetime of a PM0LED display panel and reducing power consumption. [Prior Art] Organic light-emitting diode (0LED) displays have many advantages over other flat panel displays (FPDs), including low power consumption, high brightness, and ease of manufacture, but their lifetime has not been able to reach the level of other flat panel displays. Therefore, improving the life of the OLED display panel has become a major issue. 0LED displays can be classified into active matrix organic light emitting diode (AM0LED) display panels and passive matrix organic light emitting diode (PM0LED) display panels according to the structure of their pixel arrays. In US Patent No. 6,023, A driving method for improving the lifetime of AM0LEDs has been disclosed in No. 259, but there has been no suggestion for improving the life of PM0 LED display panels. As shown in the first figure, a conventional method of driving a PM0 LED display panel includes driving a PMOLED display panel 106 with a row driver module 102 and a column driver module 104, and the panel 106 includes WL. To WLm a total of m columns, each column has n pixels (Cell〇_WLi to CelhJLi), and drive current is supplied to the pixels in the panel 106 by continuous scanning, as shown in the second figure, in the panel 106. Each column is driven sequentially by the voltage source VDD and has a time interval between two adjacent columns. The driving current when the normal display is set according to the screen requirements of the display panel 106 is set. 200844948 I〇rg and its driving cycle In order to achieve the purpose of display. This method leads to the power consumption of the PMOLED display panel cannot be reduced and the life cannot be improved. Because the panel 106 is continuously driven and scanned, the power consumption cannot be reduced, and the luminance of the PM0 LED is proportional to the driving current, as shown in the third figure. The driving current and the driving period are increased within the allowable range to obtain better display quality, but the life of the PM0 LED is negatively correlated with the product of the driving current and the usage time, so the life of the PM0 LED is often sacrificed in order to obtain better display quality. This makes power consumption impossible to reduce. Therefore, a circuit that increases the life of a PM0 LED display panel, reduces power consumption, and does not cause deterioration in display quality is a disadvantage. SUMMARY OF THE INVENTION One object of the present invention is to provide a circuit for improving the life of a PM0LED display panel and reducing power consumption. According to the present invention, a circuit for improving the life of a passive matrix type organic light emitting diode display panel and reducing power consumption includes reducing the driving current and shortening the driving period of the pixel in the organic light emitting diode display panel. One of them. [Embodiment] As shown in the fourth figure, according to the present invention, a method for improving the life of a PM0 LED display panel and reducing power consumption includes using two driver board groups, such as a row driver core group 420 and a column driver module 4. 0 4 'currently drives PM0 LED display panel 406, panel 406 contains WL 〇 to WLm 7 200844948 total m columns, each column has n pixels (CelloJLi to Celln_WLi), when PM0 LED display panel 406 is in some specific state, for example When the standby mode is sad, the screen is maintained, the display is not static, or the face is slowly changing, the area 408 in the entire PM0 LED panel 406 screen is selected, unlike the panel 406 scanning each column in the panel 406 during normal display and driving each The pixels in a column are only by the columns specific to the scanning panel 406, such as the columns (WLj to WLh) in the region 408, and drive the pixels in the columns in the region 408, such as Cel U to Cell·'. In the face display, at this time, by adjusting the driving current of the pixels in the region 408 and the driving period thereof, the brightness, the sharpness, and the like of the face are achieved to a visually identifiable minimum standard. Increase the life of the panel 406 'Further, since the voltage source is not constantly scans the entire panel of the partial columns, 408 columns scanning region only, but also the purpose of reducing power consumption.
如第五圖所示，根據本發明，-種Pm〇led顯示器面 板的控制電路500包括一電壓源VDD5〇2用以對一 pM〇LED 顯示器面板51G進行掃描’具有不同長寬比的數個電晶體 503、504、505組成的電流鏡作為面板51〇 器，電晶體503、504及505的長寬比分別為m(w/^)'、n(w/L) 及（W/L)’ 一電流控制開關SW_I506及―時間控制開關 SW—T5〇8用以調整通過面板51G中晝素的驅動電流的大小 及其驅動週期的長短，以及一電流源512妓面板51〇的 個晝素在正常顯示時的驅動電流I〜Qrg。當1506導通 時’電晶體5G3、5〇4為並聯狀態並與電;體娜組成一 電流鏡，此時從該正常驅動電流鏡射〜 8 200844948 m + n 通過面板510中的晝素，當SW一 1506為斷路時，電 B曰 體503與電晶體505組成一電流鏡，此時從該正常驅動電 流鏡射一鏡射電流1_。以丄通過面板510中的畫素，經由 m 、工 控制SW_I506的開關可調整通過面板510中晝素的驅動電 流的大小。此外，藉由控制SW_T508導通的時間可調整其 驅動週期的長短，達成延長面板51〇壽命的目的。 第六圖係根據本發明一實施例示意圖，配合第四圖說 明如下。以一電壓源VDD由上而下不斷循序地掃描區域4〇8 中的列（WL〗到WL〇，對於區域4〇8以外的列則不掃描，以 及由左而右對區域彻中的每一列中的晝素（Ce⑴到 Ce 11丨）供給驅動雷> 电机及其驅動週期，將供給區域408中書 素（Celh 到 Cell^ 短為τ 由 的驅動電流的驅動週期由正常的！\^縮 馬1 mod ’ /、中錐姓| 最低標準以上，㈣息面品f在使用者視覺上可辨識的 質的目的，此外，在太到延長面板406壽命但不影響晝面品 中的列（WLj到WLh)，實施，中電壓源VDD只掃描區域408 亦達成減少功率、;肖耗=非掃描整個面板406巾所有的列’ 第七圖係根據本發日。 說明如下。以—電墨、乃另一實施例示意圖，配合第四圖 408中的列（wn VDD由上而下不斷循序地掃描區域 以及由左而右對區域姆於區域408以外的列則不掃描， Cell)供給驅動電^ 4〇8中的每一列中的晝素（Cellk到 動週期，將供給區域408中晝 9 200844948 素（Celldj Celli)的驅動電流由正常的減少為丨_，其 中I-維持晝面品質在使用者視覺上可辨識的最低標準以 上，以達到延長面板406壽命但不影響晝面品質的目的， 此外’在本實施例中電壓源VDD只掃描區域408中的列（WLj 到WLh) ’亦達成減少功率消耗的目的。 第八圖係根據本發明又一實施例示意圖，配合第四圖 。兒明如下。以一電壓源VDD由上而下不斷循序地掃描區域 r 4〇8中的列（WL·到WLh)，對於區域4〇8以外的列則不掃描， 以及由左而右對區域4〇8中的每一列中的晝素（(^111^到 Celli)供給驅動電流及其驅動週期，將供給區域408中晝 素（Cellk到Celli)的驅動電流的驅動週期由正常的τ⑽縮 知為以及將驅動電流由正常的減少為丨_，其中 $ 1_維持晝面品質在使用者視覺上可辨識的最低標準以 ，以達到延長面板406壽命但不影響晝面品質的目的， C L外，在本實施例中電壓源VDD只掃描區域408中的列（WL· ~ 1 WLh)，亦達成減少功率消耗的目的。 本發明縮小晝素驅動電流及其驅動週期，因而達成延 PM0LED顯不器面板壽命但不影響晝面品質的目的，此 電壓源僅掃描晝面中選取的區域亦達成減少消耗功率 的目的。 【圖式簡單說明】 圖；第-圖係習知驅動PM0LED顯示器面板的方法的示意 〃圖係！ Μ帚4田pmoled顯示器面板及驅動電流與 200844948 其驅動週期的示意圖； 第三圖係PM0LED發光亮度與驅動電流的關係圖； 第四圖係根據本發明驅動PM0LED顯示器面板的方法 的示意圖； 第五圖係根據本發明的PM0LED顯示器面板的控制電 路的不意圖， 第六圖係根據本發明一實施例的示意圖； 第七圖係根據本發明另一實施例的示意圖；以及 第八圖係根據本發明又一實施例的示意圖。 【主要元件符號說明】 102 行驅動器模組 104 列驅動器模組 106 PMOLED顯示器面板 402 行驅動器模組 404 列驅動器模組 406 PMOLED顯示器面板 408 選取的區域 500 控制電路 502 電壓源 503 電晶體 504 電晶體 505 電晶體 506 電流控制開關 11 200844948 508 時間控制開關 510 PM0LED顯示器面板 512 電流源 12As shown in the fifth figure, according to the present invention, the control circuit 500 of the Pm〇led display panel includes a voltage source VDD5〇2 for scanning a pM〇LED display panel 51G's with different aspect ratios. The current mirror composed of the transistors 503, 504, and 505 is used as the panel 51, and the aspect ratios of the transistors 503, 504, and 505 are m(w/^)', n(w/L), and (W/L), respectively. ' A current control switch SW_I506 and a time control switch SW_T5〇8 are used to adjust the magnitude of the driving current passing through the panel 51G and the length of the driving period thereof, and a pixel of the current source 512 妓 panel 51 〇 The drive currents I to Qrg at the time of normal display. When 1506 is turned on, 'the transistors 5G3 and 5〇4 are in a parallel state and are electrically connected; the body Na constitutes a current mirror, at which time the normal driving current is mirrored ~ 8 200844948 m + n through the halogen in the panel 510, when When SW-1506 is open circuit, the electric B body 503 and the transistor 505 form a current mirror, and a mirror current I_ is emitted from the normal driving current. The size of the driving current through the panel 510 can be adjusted by the switches in the panel 510 through the switches of the m and the control SW_I 506. In addition, by controlling the time during which the SW_T508 is turned on, the length of the driving period can be adjusted to achieve the purpose of extending the life of the panel 51. The sixth drawing is a schematic view of an embodiment of the present invention, which is described below in conjunction with the fourth figure. The column (WL) to WL〇 in the region 4〇8 is sequentially scanned from top to bottom by a voltage source VDD, and the columns other than the region 4〇8 are not scanned, and each of the regions is left and right. The halogens (Ce(1) to Ce 11丨) in one column are supplied to drive the motor> motor and its driving cycle, and the driving period of the driving current in the supply region 408 (Celh to Cell^ is shorter than τ is normal!\ ^ shrinking horse 1 mod ' /, middle cone surname | minimum standard above, (4) the objective of the user's visually identifiable quality, in addition, in the extension of the panel 406 life but does not affect the face Columns (WLj to WLh), implemented, the medium voltage source VDD only scans the region 408 to achieve reduced power, and the chirp = non-scanning the entire panel 406 for all columns 'the seventh graph is based on this date. The description is as follows. The electro-ink, which is a schematic diagram of another embodiment, cooperates with the column in the fourth figure 408 (the wn VDD scans the region from top to bottom and the column from the left to the right to the region outside the region 408 is not scanned, Cell) Supply the halogen in each column of the drive motor (Cellk to the moving week) The driving current of C9 200844948 (Celldj Celli) in the supply area 408 is reduced from normal to 丨_, wherein I-maintains the quality of the kneading surface above the minimum visually identifiable by the user to extend the life of the panel 406. However, the purpose of the quality of the kneading is not affected, and in the present embodiment, the voltage source VDD only scans the columns (WLj to WLh) in the region 408 to achieve the purpose of reducing power consumption. The eighth figure is still another embodiment according to the present invention. A schematic diagram of an example, in conjunction with the fourth figure, is as follows: a column (WL· to WLh) in the region r 4〇8 is sequentially scanned from top to bottom by a voltage source VDD, and is not for columns other than the region 4〇8. Scanning, and supplying the driving current and its driving period to the pixels ((1111^ to Celli) in each of the regions 4〇8 from left to right, will drive the cells (Cellk to Celli) in the region 408 The driving period of the current is abbreviated from the normal τ(10) and the driving current is reduced from the normal to 丨_, where $1_ maintains the minimum standard that the surface quality is visually identifiable by the user to achieve the extended panel 406 lifetime. Does not affect the noodles For the purpose of quality, CL, in the present embodiment, the voltage source VDD only scans the columns (WL·~1 WLh) in the region 408, and also achieves the purpose of reducing power consumption. The present invention reduces the pixel drive current and its driving period. Therefore, the purpose of extending the lifetime of the PM0LED display panel without affecting the quality of the kneading surface is achieved, and the voltage source only scans the selected area in the kneading surface to achieve the purpose of reducing power consumption. [Simple diagram of the drawing] Fig. Know the schematic diagram of the method of driving the PM0LED display panel! Μ帚4 field pmoled display panel and drive current and 200844948 its drive cycle diagram; the third diagram is the relationship between PM0LED illumination brightness and drive current; the fourth diagram is a schematic diagram of the method of driving PM0LED display panel according to the present invention; Figure 6 is a schematic view of a control circuit of a PM0 LED display panel according to the present invention, a sixth diagram is a schematic view according to an embodiment of the present invention; a seventh diagram is a schematic view according to another embodiment of the present invention; and an eighth figure is according to the present invention. A schematic diagram of yet another embodiment of the invention. [Main component symbol description] 102 row driver module 104 column driver module 106 PMOLED display panel 402 row driver module 404 column driver module 406 PMOLED display panel 408 selected area 500 control circuit 502 voltage source 503 transistor 504 transistor 505 transistor 506 current control switch 11 200844948 508 time control switch 510 PM0LED display panel 512 current source 12