TWI404446B - Organic light-emitting display and control method thereof - Google Patents
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本發明是有關於一種有機發光顯示裝置與其控制方法,特別是有關於一種有機發光顯示裝置與其控制方法。The present invention relates to an organic light emitting display device and a control method thereof, and more particularly to an organic light emitting display device and a control method thereof.
相較於傳統液晶顯示器,視角廣以及反應時間快,使用有機發光材料(例如有機發光二極體)的顯示器具有視角廣以及反應時間快等優點。使用有機化合物做為發光材料可實現具有自發光源及在各視角皆有高反應速度的平面顯示器。當有機發光顯示器應用在如數位攝影機、個人數位助理(PDA)和視訊電話等之消費電子產品時,可提供低消耗功率、高亮度和尺寸輕薄等優點。有機發光顯示器可分為主動陣列裝置和被動陣列裝置,二者之主要差異係在於:主動陣列裝置係利用帶有電容的電晶體來儲存資料,而此電晶體可根據電容所儲存的資料來輸出電流至有機發光材料,藉以控制畫面的灰階。Compared with the conventional liquid crystal display, the viewing angle is wide and the reaction time is fast, and the display using the organic light-emitting material (for example, the organic light-emitting diode) has the advantages of wide viewing angle and fast reaction time. The use of an organic compound as a luminescent material enables a flat panel display having a self-luminous source and a high reaction speed at various viewing angles. When OLED displays are used in consumer electronics such as digital cameras, personal digital assistants (PDAs), and video phones, they offer the advantages of low power consumption, high brightness, and slim size. The organic light emitting display can be divided into an active array device and a passive array device. The main difference between the two is that the active array device uses a capacitor with a capacitor to store data, and the transistor can output according to the data stored in the capacitor. The current is applied to the organic light-emitting material to control the gray scale of the picture.
由於各種電子消費產品的體積越來越小,使得有機發光顯示裝置的體積受到壓縮,加上電路製程的限制,故有機發光顯示裝置的電路佈線可能具有相當大的電阻。當有機發光顯示裝置開始抽取電流時,這些電阻會形成電壓降於佈線上,而導致有機發光顯示裝置的運作不正常。Since the volume of various electronic consumer products is getting smaller and smaller, the volume of the organic light-emitting display device is compressed, and the circuit process is limited, the circuit wiring of the organic light-emitting display device may have a considerable resistance. When the organic light emitting display device starts to draw current, these resistors form a voltage drop on the wiring, which causes the organic light emitting display device to operate abnormally.
請參照第1圖,其係繪示習知之有機發光顯示裝置之像素的電路示意圖,其中像素110係用以顯示預設顏色,Vss 係代表有機發光顯示裝置100的接地參考電位。在像素110中,電晶體開關112係根據掃描線114的掃描訊號來接收資料線116的資料電壓Vdata。當電晶體開關112開啟後,資料電壓Vdata會傳遞至電容120,並且與電源裝置121所提供之電源電壓Vp產生一電位差於電容120的兩端,以使電容120儲存有代表預設顏色的電位差。接著,電晶體124根據此電位差來提供工作電流至有機發光二極體126,而使有有機發光元件126顯示預設顏色。由以上說明可知,儲存於電容120之預設顏色的資料係由電源電壓Vp和資料電壓Vdata來決定。在一般的狀況下,佈線電阻R之值非常小,電源電壓Vp可視為定值,因此資料線116只需根據電源電壓Vp來提供相應的資料電壓Vdata即可使有機發光二極體126顯示出預設顏色。然而,若佈線體積太小會導致佈線電阻R上升,當像素110抽取電流工作時,電源電壓Vp會受到佈線電阻R的影響而減少,因此儲存於電容120之電位差也會跟著變小,使有機發光元件126發生顯示錯誤。Please refer to FIG. 1 , which is a circuit diagram of a pixel of a conventional organic light emitting display device, wherein the pixel 110 is used to display a preset color, Vss It represents a ground reference potential of the organic light-emitting display device 100. In the pixel 110, the transistor switch 112 receives the data voltage Vdata of the data line 116 according to the scan signal of the scan line 114. When the transistor switch 112 is turned on, the data voltage Vdata is transmitted to the capacitor 120, and a potential difference is generated between the power supply voltage Vp provided by the power supply device 121 at both ends of the capacitor 120, so that the capacitor 120 stores a potential difference representing a preset color. . Next, the transistor 124 supplies an operating current to the organic light emitting diode 126 according to the potential difference, and causes the organic light emitting element 126 to display a preset color. As can be seen from the above description, the data stored in the preset color of the capacitor 120 is determined by the power supply voltage Vp and the data voltage Vdata. Under normal conditions, the value of the wiring resistance R is very small, and the power supply voltage Vp can be regarded as a constant value. Therefore, the data line 116 only needs to provide the corresponding data voltage Vdata according to the power supply voltage Vp, so that the organic light emitting diode 126 can be displayed. Preset color. However, if the wiring volume is too small, the wiring resistance R rises. When the pixel 110 draws current, the power supply voltage Vp is reduced by the influence of the wiring resistance R, so that the potential difference stored in the capacitor 120 also becomes smaller, making the organic The display element 126 has a display error.
因此,需要一種新的有機發光顯示裝置與其使用方法來避免因電壓降而產生的顯示錯誤。Therefore, there is a need for a new organic light emitting display device and method of use thereof to avoid display errors due to voltage drops.
本發明之一方面係在提供一種有機發光顯示裝置與其控制方法,藉以避免因電壓降而產生顯示錯誤。One aspect of the present invention provides an organic light emitting display device and a control method thereof to avoid display errors due to voltage drop.
根據本發明之實施例,此有機發光顯示裝置至少包含:複數個像素,其中每一個像素係用以顯示預設顏色,每一像 素係至少包含:有機發光元件、掃描開關、儲存電容、電流控制元件以及顯示開關。有機發光元件係用以顯示上述之預設顏色。掃描開關係用以根據一掃描訊號來接收資料電壓。儲存電容係用以儲存代表預設顏色之資料電位差,其中此資料電位差係為資料電壓與電源電壓之差值。電流控制元件係用以輸出工作電流至有機發光元件,其中電流控制元件係電性連接至儲存電容,以根據資料電位差來輸出上述之工作電流。顯示開關係用以控制有機發光元件之工作狀態,其中顯示開關係根據反向掃描訊號來工作,反向掃描訊號係與掃描訊號反向。其中,當儲存電容儲存有資料電位差且掃描開關關閉時,儲存電容之一端之電壓值可根據儲存電容之另一端之電壓值來改變,儲存電容之此端係被施加資料電壓,儲存電容之此另一端係被施加電源電壓。According to an embodiment of the invention, the organic light emitting display device comprises at least: a plurality of pixels, wherein each pixel is used to display a preset color, each image The system includes at least: an organic light emitting element, a scan switch, a storage capacitor, a current control element, and a display switch. The organic light emitting element is used to display the preset color described above. The scan-on relationship is used to receive the data voltage according to a scan signal. The storage capacitor is used to store the data potential difference representing the preset color, wherein the data potential difference is the difference between the data voltage and the power supply voltage. The current control component is configured to output an operating current to the organic light emitting component, wherein the current control component is electrically connected to the storage capacitor to output the operating current according to the data potential difference. The display on relationship is used to control the working state of the organic light emitting element, wherein the display on relationship operates according to the reverse scan signal, and the reverse scan signal is opposite to the scan signal. Wherein, when the storage capacitor stores the data potential difference and the scan switch is turned off, the voltage value of one end of the storage capacitor can be changed according to the voltage value of the other end of the storage capacitor, and the storage capacitor is applied with the data voltage, and the storage capacitor is used. The other end is applied with a power supply voltage.
根據本發明之又一實施例,此有機發光顯示裝置至少包含:複數個像素列和複數個顯示開關,其中每一像素列係包含複數個像素,每一像素係用以顯示預設顏色並至少包含:有機發光元件、掃描開關、儲存電容以及電流控制元件。有機發光元件係用以顯示預設顏色。掃描開關係用以根據一掃描訊號來接收資料電壓。儲存電容係用以儲存代表預設顏色之資料電位差,其中此資料電位差係為資料電壓與電源電壓之差值。電流控制元件係用以輸出工作電流至有機發光元件,其中電流控制元件係電性連接至儲存電容,以根據資料電位差來輸出上述之工作電流。當儲存電容儲存有資料電位差且掃描開關關閉時,儲存電容之一端之電壓值係根據儲存 電容之另一端之電壓值來改變,儲存電容之此端係被施加資料電壓,儲存電容之此另一端係被施加電源電壓。上述之顯示開關係以一對一之方式電性連接至上述之像素列,以根據反向掃描訊號來控制有機發光元件之工作狀態,其中反向掃描訊號係與掃描訊號反向。According to still another embodiment of the present invention, the organic light emitting display device includes at least: a plurality of pixel columns and a plurality of display switches, wherein each pixel column includes a plurality of pixels, each pixel is configured to display a preset color and at least Includes: organic light-emitting elements, scan switches, storage capacitors, and current control components. The organic light emitting element is used to display a preset color. The scan-on relationship is used to receive the data voltage according to a scan signal. The storage capacitor is used to store the data potential difference representing the preset color, wherein the data potential difference is the difference between the data voltage and the power supply voltage. The current control component is configured to output an operating current to the organic light emitting component, wherein the current control component is electrically connected to the storage capacitor to output the operating current according to the data potential difference. When the storage capacitor stores a data potential difference and the scan switch is turned off, the voltage value of one end of the storage capacitor is stored according to The voltage at the other end of the capacitor changes. The end of the storage capacitor is applied with a data voltage, and the other end of the storage capacitor is applied with a supply voltage. The display relationship is electrically connected to the pixel column in a one-to-one manner to control the operating state of the organic light emitting device according to the reverse scan signal, wherein the reverse scan signal is opposite to the scan signal.
根據本發明之又一實施例,提出一種有機發光顯示裝置之控方法,此控制方法係至少包含:提供一資料寫入階段,此資料寫入階段係至少包含:關閉顯示開關,以使電流控制元件停止提供工作電流至有機發光元件;開啟掃描開關來接收資料電壓並將資料電壓輸出至儲存電容,使儲存電容儲存代表預設顏色之資料電位差,其中資料電位差係為資料電壓與電源電壓之差值;以及提供補償畫面顯示階段,此補償畫面顯示階段至少包含:關閉掃描開關,使儲存電容之一端之電壓值根據另一端之電壓值來改變,其中儲存電容之此端係被施加資料電壓,儲存電容之此另一端係被施加電源電壓;以及開啟顯示開關,使電流控制元件根據資料電位差來輸出工作電流至有機發光元件,以開啟有機發光元件。According to still another embodiment of the present invention, a method for controlling an organic light emitting display device is provided. The control method includes at least: providing a data writing phase, the data writing phase includes at least: turning off the display switch to enable current control The component stops supplying the working current to the organic light emitting component; the scan switch is turned on to receive the data voltage and the data voltage is output to the storage capacitor, so that the storage capacitor stores the data potential difference representing the preset color, wherein the data potential difference is the difference between the data voltage and the power voltage And providing a compensation picture display stage, the compensation picture display stage includes at least: turning off the scan switch, so that the voltage value of one end of the storage capacitor is changed according to the voltage value of the other end, wherein the end of the storage capacitor is applied with a data voltage, The other end of the storage capacitor is applied with a power supply voltage; and the display switch is turned on to cause the current control element to output an operating current to the organic light emitting element according to the data potential difference to turn on the organic light emitting element.
請同時參照第2a圖和第2b圖,第2a圖係繪示根據本發明之第一實施例之有機發光顯示裝置200的結構示意圖,第2b圖係繪示根據本發明之第一實施例之像素202的電路示意圖。有機發光顯示裝置200係包含電源裝置201、複數個像素202、複數條掃描線204和複數條資料線206,其中佈線 電阻R係位於每一像素202與電源裝置201之間。有機發光顯示裝置200係利用掃描線204來控制每個像素202之工作時間,並利用資料線206來傳送像素202所顯示之資料,使每一像素202顯示預設顏色。Referring to FIG. 2a and FIG. 2b, FIG. 2a is a schematic structural view of an organic light emitting display device 200 according to a first embodiment of the present invention, and FIG. 2b is a first embodiment of the present invention. A schematic circuit diagram of pixel 202. The organic light-emitting display device 200 includes a power supply device 201, a plurality of pixels 202, a plurality of scanning lines 204, and a plurality of data lines 206, wherein the wiring A resistor R is located between each pixel 202 and the power supply unit 201. The organic light emitting display device 200 controls the operating time of each pixel 202 by using the scan line 204, and uses the data line 206 to transmit the data displayed by the pixel 202, so that each pixel 202 displays a preset color.
每一像素202係至少包含有機發光元件212、掃描開關214、儲存電容216、電流控制元件218及顯示開關220。有機發光元件212係於像素202工作時,用以顯示預設顏色210,其中有機發光元件212可例如為有機發光二極體。掃描開關214係電性連接至掃描線204和資料線206,以根據掃描訊號Sscan來接收資料線206所提供之資料電壓Vdata。儲存電容216之一端係電性連接至掃描開關214,儲存電容216之另一端係係電性連接至電源裝置201。當掃描開關214開啟時,儲存電容216之一端會被施加資料電壓Vdata,而其另一端則被施加電源電壓Vp,其中資料電壓Vdata與電源電壓Vp之電位差係為代表預設顏色210的資料電位差。因此,可輕易理解儲存電容216係利用上述之方式來儲存資料電位差。電流控制元件218係電性連接至儲存電容216,用以根據儲存電容216所儲存的資料電位差來輸出工作電流至有機發光元件212,使有機發光元件212根據工作電流的強度來發光。顯示開關220係用以控制有機發光元件212的工作狀態,其中顯示開關220係根據反向掃描訊號Sxscan來工作。反向掃描訊號Sxscan係與掃描訊號Sscan反向,因此當掃描開關214之工作狀態為開啟時,顯示開關220之工作狀態為關閉;當掃描開關214之工作狀態為關閉時,顯示開關 220之工作狀態為開啟。Each pixel 202 includes at least an organic light emitting element 212, a scan switch 214, a storage capacitor 216, a current control element 218, and a display switch 220. The organic light-emitting element 212 is used to display the preset color 210 when the pixel 202 is in operation, wherein the organic light-emitting element 212 can be, for example, an organic light-emitting diode. The scan switch 214 is electrically connected to the scan line 204 and the data line 206 to receive the data voltage Vdata provided by the data line 206 according to the scan signal Sscan. One end of the storage capacitor 216 is electrically connected to the scan switch 214 , and the other end of the storage capacitor 216 is electrically connected to the power supply device 201 . When the scan switch 214 is turned on, the data capacitor Vdata is applied to one end of the storage capacitor 216, and the power supply voltage Vp is applied to the other end. The potential difference between the data voltage Vdata and the power supply voltage Vp is a data potential difference representing the preset color 210. . Therefore, it can be easily understood that the storage capacitor 216 is used to store the data potential difference in the manner described above. The current control component 218 is electrically connected to the storage capacitor 216 for outputting an operating current to the organic light emitting component 212 according to the data potential difference stored in the storage capacitor 216, so that the organic light emitting component 212 emits light according to the intensity of the operating current. The display switch 220 is for controlling the operating state of the organic light emitting element 212, wherein the display switch 220 operates according to the reverse scan signal Sxscan. The reverse scan signal Sxscan is opposite to the scan signal Sscan, so when the working state of the scan switch 214 is on, the working state of the display switch 220 is off; when the working state of the scan switch 214 is off, the display switch The working status of 220 is on.
請再參照第2b圖,在本發明之第一實施例中,掃描開關214、電流控制元件218和顯示開關220係為P型電晶體,其中電流控制元件218的閘極(G)係電性連接至儲存電容216和掃描開關214的電性連接處(即節點A),源極(S)係用以接收電源電壓Vp並電性連接至儲存電容216之另一端(即節點B),汲極(D)係電性連接至顯示開關220,因此,電流控制元件218的閘極導通電壓Vgs等於儲存電容216所儲存之資料電位差。顯示開關220係電性連接於電流控制元件218和有機發光元件212之間,以決定電流控制元件218是否可提供工作電流至有機發光元件212。Referring again to FIG. 2b, in the first embodiment of the present invention, the scan switch 214, the current control element 218, and the display switch 220 are P-type transistors, wherein the gate (G) of the current control element 218 is electrically The source (S) is connected to the power supply voltage Vp and is electrically connected to the other end of the storage capacitor 216 (ie, the node B), The pole (D) is electrically connected to the display switch 220. Therefore, the gate-on voltage Vgs of the current control element 218 is equal to the data potential difference stored by the storage capacitor 216. The display switch 220 is electrically connected between the current control element 218 and the organic light emitting element 212 to determine whether the current control element 218 can supply an operating current to the organic light emitting element 212.
請參照第3圖,其係繪示根據本發明之第一實施例之節點A之電壓和節點B之電壓的波形圖。本發明之第一實施例係以兩個階段來操作有機發光顯示裝置200,此兩個階段係為資料寫入階段310和補償畫面顯示階段312。在資料寫入階段310中,掃描訊號Sscan為低電位,而反向掃描訊號Sxscan為高電位,因此掃描開關214之工作狀態為開啟,而顯示開關220之工作狀態為關閉。當掃描開關214開啟後,資料線206所提供之資料電壓Vdata會經由掃描開關214輸入至儲存電容216。若此時的電源電壓Vp之值為V1,則儲存電容216儲存的資料電位差為Va-V1,其中Va為資料電壓Vdata之值。接著,進入補償畫面顯示階段312。在補償畫面顯示階段312中,掃描訊號Sscan為高電位,而反向掃描訊號Sxscan為低電位,因此掃描開關214之工作狀態為關閉, 而顯示開關220之工作狀態為開啟。當顯示開關220開啟後,電流控制元件218可根據儲存電容216儲存的資料電位差來提供工作電流至有機發光元件212。若此時的電源電壓Vp之值因佈線電阻R的電壓降而變成V2,節點A的電壓也會隨之改變,使儲存於儲存電容216的資料電位差維持不變。假設此時節點A的電壓值為Vb,則V2-V1=Vb-Va=△V,其中△V係代表佈線電阻R的電壓降的值。由於資料電位差不會受到佈線電阻R的電壓降影響,因此有機發光元件212可顯示正常的預設顏色210。Please refer to FIG. 3, which is a waveform diagram showing the voltage of the node A and the voltage of the node B according to the first embodiment of the present invention. The first embodiment of the present invention operates the organic light-emitting display device 200 in two stages, a data writing phase 310 and a compensation screen display phase 312. In the data writing phase 310, the scanning signal Sscan is at a low potential, and the reverse scanning signal Sxscan is at a high potential, so the operating state of the scanning switch 214 is on, and the operating state of the display switch 220 is off. When the scan switch 214 is turned on, the data voltage Vdata provided by the data line 206 is input to the storage capacitor 216 via the scan switch 214. If the value of the power supply voltage Vp at this time is V1, the data potential difference stored in the storage capacitor 216 is Va-V1, where Va is the value of the data voltage Vdata. Next, the compensation screen display phase 312 is entered. In the compensation picture display stage 312, the scan signal Sscan is at a high level, and the reverse scan signal Sxscan is at a low level, so the scan switch 214 is turned off. The working state of the display switch 220 is on. When the display switch 220 is turned on, the current control element 218 can provide an operating current to the organic light emitting element 212 according to the data potential difference stored by the storage capacitor 216. If the value of the power supply voltage Vp at this time becomes V2 due to the voltage drop of the wiring resistance R, the voltage of the node A also changes, so that the potential difference of the data stored in the storage capacitor 216 remains unchanged. Assuming that the voltage value of the node A at this time is Vb, V2-V1 = Vb - Va = ΔV, where ΔV represents the value of the voltage drop of the wiring resistance R. Since the data potential difference is not affected by the voltage drop of the wiring resistance R, the organic light emitting element 212 can display the normal preset color 210.
請參照第4圖其係繪示根據本發明第一實施例之有機發光顯示裝置200之控制方法400。在步驟401中,係提供資料寫入階段310,以寫入代表預設顏色210之資料於儲存電容216中。在步驟402中,係提供補償畫面顯示階段312,以使有機發光元件212顯示正常的預設顏色210。Referring to FIG. 4, a control method 400 of an organic light emitting display device 200 according to a first embodiment of the present invention is illustrated. In step 401, a data writing stage 310 is provided to write data representative of the preset color 210 in the storage capacitor 216. In step 402, a compensated picture display stage 312 is provided to cause the organic light-emitting element 212 to display a normal preset color 210.
請參照第4a圖,其係繪示資料寫入階段310之流程圖。在步驟401a中,關閉顯示開關220使電流控制元件218停止提供工作電流至有機發光元件212,以便進行資料寫入動作。在步驟401b中,開啟掃描開關214來接收資料電壓Vdata,並將資料電壓Vdata送至儲存電容216,使儲存電容216儲存代表預設顏色210之資料電位差。Please refer to FIG. 4a, which is a flow chart showing the data writing stage 310. In step 401a, the display switch 220 is turned off to cause the current control element 218 to stop providing an operating current to the organic light emitting element 212 for data writing. In step 401b, the scan switch 214 is turned on to receive the data voltage Vdata, and the data voltage Vdata is sent to the storage capacitor 216, so that the storage capacitor 216 stores the data potential difference representing the preset color 210.
請參照第4b圖,其係繪示補償畫面顯示階段312之流程圖。在步驟402a中,關閉掃描開關214,使節點A之電壓值根據電源電壓Vp來改變。在步驟402b中,開啟顯示開關220,使電流控制元件218根據資料電位差來輸出工作電流 至有機發光元件212,以開啟有機發光元件212。Please refer to FIG. 4b, which is a flow chart showing the compensation screen display stage 312. In step 402a, the scan switch 214 is turned off so that the voltage value of the node A changes in accordance with the power supply voltage Vp. In step 402b, the display switch 220 is turned on to cause the current control element 218 to output an operating current according to the data potential difference. The organic light emitting element 212 is turned on to turn on the organic light emitting element 212.
請同時參照第5a圖和第5b圖,第5a圖係繪示根據本發明之第二實施例之有機發光顯示裝置500的結構示意圖,第5b圖係繪示根據本發明之第二實施例之像素502的電路示意圖。像素502係類似於像素202,但像素502更包含電源選擇裝置508,其中電源選擇裝置508係包含第一電源開關510和第二電源開關512。第一電源開關510係用以根據掃描訊號Sscan來提供第一電壓Vp1,第二電源開關512係用以根據反向掃描訊號Sxscan來提供第二電壓Vp2。第一電源開關510和第二電源開關512係電性連至儲存電容216和電流控制元件218的電性連接處(即節點B)。根據以上說明可合理推知,電源電壓Vp係為第一電壓Vp1或第二電壓Vp2。Referring to FIG. 5a and FIG. 5b, FIG. 5a is a schematic structural view of an organic light emitting display device 500 according to a second embodiment of the present invention, and FIG. 5b is a second embodiment of the present invention. A schematic circuit diagram of pixel 502. Pixel 502 is similar to pixel 202, but pixel 502 further includes power supply selection device 508, wherein power supply selection device 508 includes a first power switch 510 and a second power switch 512. The first power switch 510 is configured to provide a first voltage Vp1 according to the scan signal Sscan, and the second power switch 512 is configured to provide a second voltage Vp2 according to the reverse scan signal Sxscan. The first power switch 510 and the second power switch 512 are electrically connected to the electrical connection of the storage capacitor 216 and the current control element 218 (ie, node B). According to the above description, it can be reasonably inferred that the power source voltage Vp is the first voltage Vp1 or the second voltage Vp2.
請參照第6圖,其係繪示根據本發明之第二實施例之節點A之電壓和節點B之電壓的波形圖。本發明之第二實施例係以兩個階段來操作有機發光顯示裝置200,此兩個階段係為資料寫入階段310和補償畫面顯示階段312。在資料寫入階段310中,掃描訊號Sscan為低電位,而反向掃描訊號Sxscan為高電位,因此掃描開關214和第一電源開關510之工作狀態為開啟,而顯示開關220和第二電源開關512之工作狀態為關閉。當掃描開關214開啟後,資料線206所提供之資料電壓Vdata會經由掃描開關214輸入至儲存電容216。另外,第一電源開關510開啟後,此時的電源電壓Vp為第一電壓Vp1,若第一電壓Vp1之值為V1,儲存電容216儲存的資料電位差則為Va-V1,其中Va係為資料電壓Vdata 之值。接著,進入補償畫面顯示階段312。在補償畫面顯示階段312中,掃描訊號Sscan為高電位,而反向掃描訊號Sxscan為低電位,因此掃描開關214和第一電源開關510之工作狀態為關閉,而顯示開關220和第二電源開關512之工作狀態為開啟。當顯示開關220開啟後,電流控制元件218可根據儲存電容216儲存的資料電位差來提供工作電流至有機發光元件212。另外,當第二電源開關512開啟後,此時節點B的電壓係由第二電壓Vp2來決定。若此時的第二電壓Vp2之值因佈線電阻R的電壓降變成V2,則節點A的電壓也會隨著改變,使儲存於儲存電容216的資料電位差維持不變。假設此時節點A的電壓值為Vb,則V2-V1=Vb-Va=△V,其中△V為電源電壓Vp的變動值,且由於本第二實施例之第一電壓Vp1之值係與第二電壓Vp2之值無關,因此△V可能為正值或負值。值得注意的是,由於佈線電阻R之電壓降的影響,△V不等於原先設計之第一電壓Vp1和第二電壓Vp2的差值。由於資料電位差不會受到佈線電阻R的電壓降影響,因此有機發光元件212可顯示正常的預設顏色210。Please refer to FIG. 6, which is a waveform diagram showing the voltage of the node A and the voltage of the node B according to the second embodiment of the present invention. The second embodiment of the present invention operates the organic light-emitting display device 200 in two stages, a data writing phase 310 and a compensation screen display phase 312. In the data writing phase 310, the scan signal Sscan is low, and the reverse scan signal Sxscan is high, so the scan switch 214 and the first power switch 510 are turned on, and the display switch 220 and the second power switch are The working state of 512 is off. When the scan switch 214 is turned on, the data voltage Vdata provided by the data line 206 is input to the storage capacitor 216 via the scan switch 214. In addition, after the first power switch 510 is turned on, the power supply voltage Vp at this time is the first voltage Vp1. If the value of the first voltage Vp1 is V1, the data potential difference stored by the storage capacitor 216 is Va-V1, where Va is data. Voltage Vdata The value. Next, the compensation screen display phase 312 is entered. In the compensation picture display stage 312, the scan signal Sscan is at a high level, and the reverse scan signal Sxscan is at a low level, so the scan switch 214 and the first power switch 510 are turned off, and the display switch 220 and the second power switch are The working state of 512 is on. When the display switch 220 is turned on, the current control element 218 can provide an operating current to the organic light emitting element 212 according to the data potential difference stored by the storage capacitor 216. In addition, when the second power switch 512 is turned on, the voltage of the node B at this time is determined by the second voltage Vp2. When the value of the second voltage Vp2 at this time is changed to V2 due to the voltage drop of the wiring resistance R, the voltage of the node A also changes, and the potential difference of the data stored in the storage capacitor 216 is maintained. Assuming that the voltage value of the node A is Vb at this time, V2-V1=Vb-Va=ΔV, where ΔV is a variation value of the power supply voltage Vp, and since the value of the first voltage Vp1 of the second embodiment is The value of the second voltage Vp2 is independent, so ΔV may be positive or negative. It is worth noting that ΔV is not equal to the difference between the originally designed first voltage Vp1 and the second voltage Vp2 due to the influence of the voltage drop of the wiring resistance R. Since the data potential difference is not affected by the voltage drop of the wiring resistance R, the organic light emitting element 212 can display the normal preset color 210.
請同時參照第7圖和第8圖,第7圖係繪示根據本發明之第三實施例之有機發光顯示裝置700之像素列702的驅動方塊示意圖,第8圖係繪示根據本發明之第三實施例之有機發光顯示裝置700之像素列702之像素202的驅動電路示意圖。有機發光顯示裝置700係類似於有機發光顯示裝置500,但有機發光顯示裝置700之每一像素列702之像素202係共用第一電源開關510和第二電源開關512。由於有機發光顯 示裝置700之像素202的電晶體數量比有機發光顯示裝置500的像素202的電晶體數量更少,因此有機發光顯示裝置700的像素體積可比有機發光顯示裝置500的像素體積更小。Please refer to FIG. 7 and FIG. 8 simultaneously. FIG. 7 is a schematic diagram showing the driving block of the pixel column 702 of the organic light-emitting display device 700 according to the third embodiment of the present invention, and FIG. 8 is a schematic diagram of the pixel array 702 according to the present invention. A schematic diagram of a driving circuit of a pixel 202 of a pixel column 702 of the organic light emitting display device 700 of the third embodiment. The organic light emitting display device 700 is similar to the organic light emitting display device 500, but the pixels 202 of each pixel column 702 of the organic light emitting display device 700 share the first power switch 510 and the second power switch 512. Due to organic light emission The number of transistors of the pixel 202 of the display device 700 is smaller than the number of transistors of the pixel 202 of the organic light-emitting display device 500, and thus the pixel volume of the organic light-emitting display device 700 can be smaller than the pixel volume of the organic light-emitting display device 500.
請同時參照第9圖和第10圖,第9圖係繪示根據本發明之第四實施例之有機發光顯示裝置800之像素列802的驅動方塊示意圖,第10圖係繪示根據本發明之第四實施例之有機發光顯示裝置800之像素列802之像素202的驅動電路示意圖。有機發光顯示裝置800係類似於有機發光顯示裝置700,但有機發光顯示裝置800之每一像素列802之像素202係共用顯示開關220。由於有機發光顯示裝置800之像素202的電晶體數量比有機發光顯示裝置700的像素202的電晶體數量更少,因此有機發光顯示裝置800之像素的體積可進一步地縮小。Referring to FIG. 9 and FIG. 10 together, FIG. 9 is a schematic diagram showing the driving of the pixel column 802 of the organic light-emitting display device 800 according to the fourth embodiment of the present invention, and FIG. 10 is a schematic diagram of the pixel array 802 according to the present invention. A schematic diagram of a driving circuit of a pixel 202 of a pixel column 802 of the organic light emitting display device 800 of the fourth embodiment. The organic light emitting display device 800 is similar to the organic light emitting display device 700, but the pixels 202 of each pixel column 802 of the organic light emitting display device 800 share the display switch 220. Since the number of transistors of the pixels 202 of the organic light-emitting display device 800 is smaller than the number of transistors of the pixels 202 of the organic light-emitting display device 700, the volume of the pixels of the organic light-emitting display device 800 can be further reduced.
雖然本發明已以實施例揭露如上,然其並非用以限定本發明,任何熟習此技藝者,在不脫離本發明之精神和範圍內,當可作各種之更動與潤飾,因此本發明之保護範圍當視後附之申請專利範圍所界定者為準。Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention, and the present invention can be modified and retouched without departing from the spirit and scope of the present invention. The scope is subject to the definition of the scope of the patent application attached.
100‧‧‧有機發光顯示裝置100‧‧‧Organic light-emitting display device
110‧‧‧像素110‧‧ ‧ pixels
112‧‧‧電晶體開關112‧‧‧Transistor Switch
114‧‧‧掃描線114‧‧‧ scan line
116‧‧‧資料線116‧‧‧Information line
120‧‧‧電容120‧‧‧ Capacitance
121‧‧‧電源裝置121‧‧‧Power supply unit
124‧‧‧電晶體124‧‧‧Optoelectronics
126‧‧‧有機發光二極體126‧‧‧Organic Luminescent Diodes
200‧‧‧有機發光顯示裝置200‧‧‧Organic light-emitting display device
201‧‧‧電源裝置201‧‧‧Power supply unit
202‧‧‧像素202‧‧ ‧ pixels
204‧‧‧掃描線204‧‧‧ scan line
206‧‧‧資料線206‧‧‧Information line
212‧‧‧有機發光元件212‧‧‧Organic light-emitting elements
214‧‧‧掃描開關214‧‧‧ scan switch
216‧‧‧儲存電容216‧‧‧ storage capacitor
218‧‧‧電流控制元件218‧‧‧ Current control components
220‧‧‧顯示開關220‧‧‧ display switch
310‧‧‧資料寫入階段310‧‧‧Data writing stage
312‧‧‧補償畫面顯示階段312‧‧‧Compensation screen display stage
400‧‧‧控制方法400‧‧‧Control method
401‧‧‧步驟401‧‧‧ steps
401a‧‧‧步驟401a‧‧ steps
401b‧‧‧步驟401b‧‧‧Steps
402‧‧‧步驟402‧‧‧Steps
402a‧‧‧步驟402a‧‧‧Steps
402b‧‧‧步驟402b‧‧‧Steps
500‧‧‧有機發光顯示裝置500‧‧‧Organic light-emitting display device
502‧‧‧像素502‧‧ ‧ pixels
508‧‧‧電源選擇裝置508‧‧‧Power selection device
510‧‧‧第一電源開關510‧‧‧First power switch
512‧‧‧第二電源開關512‧‧‧Second power switch
700‧‧‧有機發光顯示裝置700‧‧‧Organic light-emitting display device
702‧‧‧像素列702‧‧‧pixel columns
800‧‧‧有機發光顯示裝置800‧‧‧Organic light-emitting display device
802‧‧‧像素列802‧‧‧pixel columns
Vss‧‧‧接地參考電位Vss‧‧‧ Ground reference potential
Vdata‧‧‧資料電壓Vdata‧‧‧ data voltage
Vp‧‧‧電源電壓Vp‧‧‧Power supply voltage
Vp1‧‧‧第一電壓Vp1‧‧‧ first voltage
Vp2‧‧‧第二電壓Vp2‧‧‧second voltage
Sscan‧‧‧掃描訊號Sscan‧‧‧ scan signal
Sxscan‧‧‧反向掃描訊號Sxscan‧‧‧reverse scan signal
R‧‧‧佈線電阻R‧‧‧ wiring resistance
A‧‧‧節點A‧‧‧ node
B‧‧‧節點B‧‧‧ node
V1‧‧‧電壓值V1‧‧‧ voltage value
V2‧‧‧電壓值V2‧‧‧ voltage value
△V‧‧‧電壓變動值△V‧‧‧ voltage variation
為讓本發明之上述和其他目的、特徵、和優點能更明顯易懂,下文特舉一較佳實施例,並配合所附圖式,作詳細說明如下:The above and other objects, features, and advantages of the present invention will become more apparent and understood.
第1圖係繪示習知技術之有機發光顯示裝置之像素的電路示意圖。FIG. 1 is a circuit diagram showing the pixels of a conventional organic light-emitting display device.
第2圖係繪示根據本發明之第一實施例之有機發光顯示裝置之像素的電路示意圖。2 is a circuit diagram showing a pixel of an organic light emitting display device according to a first embodiment of the present invention.
第3圖係繪示根據本發明之第一實施例之節點A之電壓和節點B之電壓的波形圖。Fig. 3 is a waveform diagram showing the voltage of the node A and the voltage of the node B according to the first embodiment of the present invention.
第4圖係根據本發明第一實施例之有機發光顯示裝置之控制方法。Fig. 4 is a view showing a control method of an organic light-emitting display device according to a first embodiment of the present invention.
第4a圖係繪示資料寫入階段之流程圖。Figure 4a is a flow chart showing the data writing phase.
第4b圖係繪示補償畫面顯示階段之流程圖。Figure 4b is a flow chart showing the stage of the compensation screen display.
第5圖係繪示根據本發明之第二實施例之有機發光顯示裝置之像素的電路示意圖。5 is a circuit diagram showing a pixel of an organic light emitting display device according to a second embodiment of the present invention.
第6圖係繪示根據本發明之第二實施例之節點A之電壓和節點B之電壓的波形圖。Figure 6 is a waveform diagram showing the voltage of the node A and the voltage of the node B according to the second embodiment of the present invention.
第7圖係繪示根據本發明之第三實施例之有機發光顯示裝置之像素的驅動方塊圖。Figure 7 is a block diagram showing the driving of a pixel of an organic light-emitting display device according to a third embodiment of the present invention.
第8圖係繪示根據本發明之第三實施例之有機發光顯示裝置之像素列之像素的驅動電路示意圖。8 is a schematic diagram showing a driving circuit of a pixel of a pixel column of an organic light emitting display device according to a third embodiment of the present invention.
第9圖係繪示根據本發明之第四實施例之有機發光顯示裝置之像素列的驅動方塊圖。Figure 9 is a block diagram showing the driving of a pixel column of an organic light-emitting display device according to a fourth embodiment of the present invention.
第10圖係繪示根據本發明之第四實施例之有機發光顯示裝置之像素列之像素的驅動電路示意圖。FIG. 10 is a schematic diagram showing a driving circuit of a pixel of a pixel column of an organic light emitting display device according to a fourth embodiment of the present invention.
201‧‧‧電源裝置201‧‧‧Power supply unit
202‧‧‧像素202‧‧ ‧ pixels
204‧‧‧掃描線204‧‧‧ scan line
206‧‧‧資料線206‧‧‧Information line
212‧‧‧有機發光元件212‧‧‧Organic light-emitting elements
214‧‧‧掃描開關214‧‧‧ scan switch
216‧‧‧儲存電容216‧‧‧ storage capacitor
218‧‧‧電流控制元件218‧‧‧ Current control components
220‧‧‧顯示開關220‧‧‧ display switch
Vdata‧‧‧資料電壓Vdata‧‧‧ data voltage
Vss‧‧‧接地參考電位Vss‧‧‧ Ground reference potential
Sscan‧‧‧掃描訊號Sscan‧‧‧ scan signal
Vp‧‧‧電源電壓Vp‧‧‧Power supply voltage
R‧‧‧佈線電阻R‧‧‧ wiring resistance
Sxscan‧‧‧反向掃描訊號Sxscan‧‧‧reverse scan signal
A‧‧‧節點A‧‧‧ node
B‧‧‧節點B‧‧‧ node
Claims (18)
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TWI228014B (en) * | 2003-06-02 | 2005-02-11 | Au Optronics Corp | Apparatus and method of AC driving OLED |
TW200603035A (en) * | 2004-06-22 | 2006-01-16 | Samsung Electronics Co Ltd | Display device and a driving method thereof |
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TW200603035A (en) * | 2004-06-22 | 2006-01-16 | Samsung Electronics Co Ltd | Display device and a driving method thereof |
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