201133447 六、發明說明： 【發明所屬之技術領域】 本發明是有關於一種顯示器的晝素電路，且特別是有關於 一種主動式有機致電發光之顯示器的晝素電路。 【先前技術】 有機發光二極體(Organic Light Emitting Diode ; OLED)顯201133447 VI. Description of the Invention: [Technical Field] The present invention relates to a pixel circuit of a display, and more particularly to a pixel circuit for an active organic light-emitting display. [Prior Art] Organic Light Emitting Diode (OLED) display
示器具有高亮度、榮幕反應速度快、輕薄短小、全彩、無視角 差、不需液晶顯示器式背光板以及節省燈源及耗電量等優點。 因此，有機發光二極體已有取代扭曲向列(Twist Nematic ; TN) 與超扭曲向列(Super Twist Nematic ; STN)液晶顯示器趨勢，並 且更一步取代小尺寸薄膜電晶體液晶顯示器（TFT_LCD)，而成 為新一代攜帶型資訊產品、行動電話、個人數位處理器以及攜 帶型電腦普遍使用的顯示材料。 一有機發光二極體顯示器依驅動方式’可分為被動式有機發 光二極體(Passive Matrix 〇LED，簡稱pM〇LED)顯示器與主 動式有機發光二極體(ActiveMatrix0咖，簡稱AM〇LE聊 =器。其中，AMOLED顯示器，即是利用薄膜電晶體(Thin Fnm ansistor ’ TFT) ’搭配電容儲存訊號，來控制的亮度 =於在主動驅動的方式下，0咖並不需要驅動到 度’因此可達到較佳的壽命表現，也可以達成高解 择作调细& 盗的畫素操作，可以分為放 門，屌』二寫 週期和發光操作週期。在放電操作週期 被釋放，以便在接下來的資料寫存電容的電荷 鳩咖顯示器之書辛中中接曰：，在發光操作週期期間 —^的電曰曰體’就會依據儲存電容… 201133447 位而產生驅動電流’並且驅動OLED發光。 在習知的AMOLED齡||巾，在放電操作週 素中的電晶體也會因為被釋放的電荷產生電流，^、’思 稱作漏電流。而漏電流的產生，會驅動畫素 以被 該是暗態的情況下發光。 ’在應 【發明内容】 料因H本發明提供—種發紐組、，._光二極體驅動方 法和一種顯示裝置’可以在放電操作㈣有 動方 而解決誤發光的情況。 =明提供-種發光模組，包括發光二極體、驅動電路 引&電阳體。發光二極體的陰極電性耦接至第—電位，而 極則電性_至軸電路。藉此，轉電路可以提供驅雷 給發光二極體。另外，引流電晶體則包括控制端、第一 端。其中’引流電晶體的第—控制端可以控ϋ弓I 電0曰體的第一通路端與第二通路端之間的電性導通程产。 =晶體的第-通路端電性_至該發光二極體的陽ς，並 引机電晶體的第二通路端則電性耦接至一第二電位。特 是’上述的第—電位和第二電位皆為固定電位，並且第一t 與第二電位不同。 電 端盘ΐ本ί明之-實施例中’引流電晶體在導通時，第―通路 第二通路端之間的電壓絕對值與第二電位的和，會小於第 一電位與發光二極體的啟動電壓(on_voltage)的和。 、 從另一觀點來看，本發明還提供一種發光二 ，，包括提供一驅動電路，用來電馳至發光二 虽’以適時驅動發光二極體，並且本發明之鶴方法，還使發 201133447 陽極透過一開關而電性耦接至固定的-第二電 位、中，第-電位與第二電位不同 期間，在部分時段中藉由+ _ff_state)。 相關而使發光二極體呈現關閉狀 從另 ‘賴轉，本發明更提供—種顯示裝置，包括電源 ===光源。電源供應裝置可以提供電力給發光源，而 么先源則匕括至>、-發光模組。發光模組 ;動電路和引流電晶體。發光二極體的陰極電 祕則電性耦接至驅動電路。藉此，驅動電路可以 ，〔驅，電流至發光二極體。另外，引流電晶體則包括控制 二::ΐ路端，與第二通路端。其中，引流電晶體的第-控制 性導、甬^丨流電晶體的第-通路端與第二通路端之間的電 弓丨流電㈣的第—通路端電性_至該發光二 :垂·座’並且引流電晶體的第二通路端則電性搞接至-第 :電：。二寺別的是，上述的第一 _和第二電位皆為固定電 ’並且第一電位與第二電位不同。 體，因由發Γ將發光二極體的陽極電性轉接至一引流電晶 免誤效地阻隔漏電流對於發光二極體的影響，而避 懂，下為ϋ發明之上述和其他目的、特徵和優點能更明顯易 下文特舉較佳實施例’並配合所附圖式，作詳細說明如下。 【實施方式】 提供Hi要的精神’就是在顯示11在放電操作週期期間， ，可以將放電電荷所造成的漏電流引流至別卢， 而不會通過發光二極體。藉此，就可以解決誤發光的問題, 圖1繪示為依照本發明之一較佳實施例的一種顯示骏置 201133447 的系統方塊圖。請參照圖1，本實施例所提供的顯示裝置100， 包括電源供應裝置102和發光源104。其中，電源供應裝置102 電性耦接至發光源104，以供應其所需的電力，例如工作電壓The display has high brightness, fast response speed, light and thin, full color, no viewing angle difference, no need for liquid crystal display backlight, and saves light source and power consumption. Therefore, organic light-emitting diodes have replaced the trend of Twist Nematic (TN) and Super Twist Nematic (STN) liquid crystal displays, and have further replaced small-size thin film transistor liquid crystal displays (TFT_LCD). It has become a display material commonly used in a new generation of portable information products, mobile phones, personal digital processors and portable computers. An organic light-emitting diode display can be divided into a passive organic light-emitting diode (Passive Matrix 〇LED, abbreviated as pM〇LED) display and an active organic light-emitting diode according to the driving mode (ActiveMatrix0 coffee, referred to as AM〇LE chat = Among them, AMOLED display, which uses thin film transistor (Thin Fnm ansistor 'TFT)' with capacitor storage signal to control the brightness = in the active drive mode, 0 does not need to drive to the degree 'so To achieve better life performance, high resolution can also be achieved for fine-tuning & pirate pixel operations, which can be divided into a door, a second write cycle and a light-emitting operation cycle. It is released during the discharge operation cycle so that it can be connected. The information that is written down to store the charge of the capacitor is in the middle of the book. In the illuminating operation period, the electric ' body will generate the driving current according to the storage capacitor...201133447 and drive the OLED. In the conventional AMOLED age | | towel, the transistor in the discharge operation will also generate current due to the released charge, ^, 'Thinking of leakage current. Produced, will drive the pixels to be illuminated in the case of the dark state. 'In the case of the invention】 The material is provided by the invention, the hairpin group, the ._photodiode driving method and a display device can In the discharge operation (4), there is a dynamic solution to solve the problem of false illumination. = Ming provides a kind of illumination module, including a light-emitting diode, a drive circuit lead, and an electric anode. The cathode of the light-emitting diode is electrically coupled to the first - the potential, and then the electrical _ to the axis circuit. By this, the circuit can provide lightning protection to the light-emitting diode. In addition, the draining transistor includes a control terminal, the first end, wherein the first of the 'drainage transistor The control terminal can control the electrical conduction between the first path end and the second path end of the I I 。 = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = The second path end of the electromechanical crystal is electrically coupled to a second potential. Specifically, the first potential and the second potential are both fixed potentials, and the first t is different from the second potential. ΐ ΐ ί ί - - In the embodiment - 'drainage transistor when conducting, The sum of the absolute value of the voltage between the second path ends and the second potential may be less than the sum of the first potential and the on-voltage of the light-emitting diode. From another point of view, the present invention also provides a light-emitting. Second, comprising providing a driving circuit for electrically driving to the light-emitting device 2, while driving the light-emitting diode in a timely manner, and the crane method of the present invention further enables the anode of the 201133447 to be electrically coupled to the fixed through a switch- The two potentials, the middle, and the first potential are different from the second potential by + _ff_state in a part of the period. Correspondingly, the light-emitting diode is turned off. From the other, the present invention further provides a display device including a power source === light source. The power supply device can provide power to the illumination source, and the source is included to the >, the illumination module. Light-emitting module; moving circuit and draining transistor. The cathode of the LED is electrically coupled to the driver circuit. Thereby, the driving circuit can [drive, current to the light emitting diode. In addition, the draining transistor includes a control two: a crotch end and a second end. Wherein, the first controllable conductance of the draining transistor, the first path end of the current path between the first path end and the second path end of the current channel, and the first end of the electric current _ to the illuminating light: The second terminal end of the draining transistor is electrically connected to the -first: electric:. In the second temple, the first _ and the second potential are both fixed and the first potential is different from the second potential. Body, because the hair is electrically transferred to the anode of the light-emitting diode to a draining electron crystal to prevent the leakage current from affecting the light-emitting diode, and avoiding the above and other purposes of the invention, The features and advantages are more apparent and will be described in detail below with reference to the accompanying drawings. [Embodiment] Providing the spirit of Hi is that during the discharge operation period of the display 11, the leakage current caused by the discharge charge can be drained to the other side without passing through the light-emitting diode. Thereby, the problem of false illumination can be solved. FIG. 1 is a block diagram of a system for displaying Jun 201133447 according to a preferred embodiment of the present invention. Referring to FIG. 1 , the display device 100 provided in this embodiment includes a power supply device 102 and a light source 104 . The power supply device 102 is electrically coupled to the illumination source 104 to supply the required power, such as the operating voltage.
Vrefl、Vref2、VDD 以及 VSS。 請繼續參照圖1，發光源104具有至少一發光模組，而在 本實施例中，發光源104則具有多個發光模組110，並且這些 發光模組110是以陣列方式排列。實質上，發光源104中的每 一發光模組110,都分別是一個畫素。另外，每一發光模組n〇 都分別具有一發光二極體112。當每一發光二極體112分別被 對應的驅動電流驅動時，就會分別被點亮。而每一畫素的灰 階’則和驅動每一發光二極體的驅動電流大小有關。在一些實 施例中’這些發光二極體112可以利用有機發光二極體來實 現。 圖2繪示為依照本發明之一較佳的一種發光模組的電路 方塊圖；圖3則繪示依照本發明之一較佳實施例的一種發光二 極體之操作方法的步驟流程圖。請合併參照圖2和圖3，在發 光模組110中，可以如步驟S302所述，提供一驅動電路202 , 其可以電性耦接至發光二極體112的陽極，並且可以適時的將 其驅動。在本實施例中，驅動電路可以接收圖1之電源供應裝 置102所輸出的電力，例如工作電壓Vrefl。另外，驅動電路 202還可以接收一資料訊號v_Data，以及可以接收多個控制訊 號’例如控制訊號VN1、VN2和VEM。 接著，如步驟S304所述，可以將發光二極體的陰極電性 耦接至工作電壓VSS。在本實施例中，電壓訊號VSS具有固 定的第一電位。另一方面，發光二極體112的陽極還可以如步 驟S306所述，透過一開關204而電性耦接至工作電壓Vref2。 201133447 ^一工作電壓Vref2則具有固定的第二電位，而第二電位與 電位並不相同。特別的是，開關兩端的電壓絕對值與第二 M4的和’會小於第—電位與發光二極體的啟動電壓的和。 ,此外i開關2〇4的操作，可以如步驟s3〇8所述，在驅動 202知作期間’在部分時段中，例如放電操作週期，則藉 、通開關204，而使發光二極體112呈現關閉狀態。如此一 L在放電操作週期期間，若是驅動電路202產生漏電流，則 於開關204導通，而可以使漏電流越過發光二極體112。 第一實施例 ，4繪不為依照本發明一實施例的一種發光模組的電路 圖叫參照圖4 ’在本實施例中，驅動電路2〇2包括第一電晶 體402、第二電晶體4〇4、第三電晶體4〇6、第四電晶體備、 第五電晶體410和電容412。第一電晶體4〇2的第一通路端電 性耗接資料訊號V-Data，而其控制劇受第—控制訊號覆 控制。另外’第-電晶體4〇2的第二通路端則透過電容412而 電性輕接至第二電晶體404的控制端，並且第一電晶體4〇2的 第二通路端還電性耦接至第四電晶體4〇8的第一通路端。而第 四電晶體408的的第二通路端和控制端，則分別電性耗接工作 電壓Vrefl和第三控制訊號VEM。 第二電晶體404的第一通路端電性耦接至工作電壓 VDD’而其第二通路端則電性耦接至第三電晶體4〇6和第五電 晶體410的第一通路端。其中，第三電晶體的控制端電性連接 至第二控制訊號VN2’而其第二通路端則電性耦接至第二電晶 體404的控制端。另一方面，第五電晶體41〇的控制端電性 搞接控制況號VEM，而其第二通路蹲則電性輕接至發光二極 201133447 體112的陽極。 請繼續參照圖4，開關2〇4也可以利用一引流電晶體422 來實現。其中，引流電晶體422的第一通路端電性耦接至發光 二極體112的陽極，而引流電晶體的控制端和第二通路端，則 为別電性搞接至第一控制訊號VN2和工作電愿vref2。如此一 來’引流電晶體422之第-通道端和第二通道端的導通程度， 就會由引流電晶體422之控制端的電位來決定。特別的是，在 引流電晶體422導通時，弓丨流電晶體的第一通路端與第二通路 端之間的電壓絕對值與工作電壓Vref2之第二電位的和，會小 於工作電壓Vrefl之第一電位與發光二極體112的啟動電壓的 和0 在本實施例中’電晶體402、404、406、408、410和422 可以都是PMOS電晶體。以下就以PM〇s電晶體為例，而敘 述圖4中之控制訊號的時序。 圖5繪示為依照本發明第一實施例的一種控制訊號的時 序圖。請合併參照圖4和圖5，在放電操作週期P1期間，第 一控制訊號VN1為高態，而第二控制訊號VN2和第三控制訊 號VEM都為低態，因此導致第一電晶體4〇2關閉，而第三電 晶體406、第四電晶體408、第五電晶體410以及引流電晶體 422都會被導通。此時，原本儲存在電容412中的電荷會循著 第三電晶體406到第五電晶體410的路徑PA1被釋放，因而 在路徑PA1上產生電流。此時，由於引流電晶體422的第一 通路端與第二通路端之間的電壓絕對值與工作電壓乂代〇之第 二電位的和，會小於工作電壓Vrefl之第一電位與發光二極體 的啟動電壓的和，因此發光二極體112並不會導通。換句話 說，此時在路徑PA1上所產生的電流會越過發光二極體112， 201133447 而從引流電晶體422流過。因此，就不會產生誤發光的情形。 在前段寫入操作週期P2期間，第一控制控制訊號VN1 會切換到低態；第二控制訊號VN2會維持在低態；而第三控 制訊號VEM則會切換至高態。因此，第一電晶體4〇2、第三 電晶體406和引流電晶體422都會導通，而第四電晶體408和 第五電晶體410則轉為關閉。此時，資料訊號v_Data會從第 一電晶體402的第一通路端輸入至發光模組11〇，並且電容412 會從第一電晶體402的第二通路端，而儲存資料訊號v_Data 的電位。 接著，在後段寫入操作週期P3期間，第一控制訊號VN1 和第二控制訊號VEM會維持原來的狀態，而第二控制訊號 VN2則會從低態切換至高態，因此導致第三電晶體概和引流 電晶體422會關閉。這使得電容412所儲存的電位會被鎖定在 資料訊號V_Data的電位。 而在發光操作週期P4期間，第一控制訊號VN1和第三控 制义號VEM會分別切換至高態和低態，而第二控制訊號 則會維持在高態。因此，第一電晶體4〇2、第三電晶體4〇6和 引流電晶體422會關閉，而第四電晶體儀和第五電晶體41〇 則5導通。此時’帛二電晶體姻會因為儲存在電容412中的 電街而產生驅動電’並且此驅動電流會通過第五電晶體“ο 而驅動發光二極體112發光。 從圖5中可以發現，第一控制訊號观和第三控制訊號 顧彼此反相。因此，利用此特性，第—控制訊號谓和第 三控制城VEM就可以彼此取替。而以下則揭露另一實施 例，來說明如何利用較少的控制訊號來控制驅動電路挪。 201133447 第二實施例 圖6繪示為依照本發明第二實施例的一種發光模組的電 路圖。請參照圖6，本實施例與第一實施例的不同點在於，第 四電晶體408和第五電晶體410可以利用NMOS電晶體來實 現’而第一電晶體402、第二電晶體406、第三電晶體408和 引流電晶體422還是由PMOS電晶體來實現。如此一來，第 一控制訊號VN1就可以取代第一實施例中的第三控制訊號 VEM，而送至第四電晶體408和第五電晶體410的控制端， 以控制二者的狀態。 圖7繪示為依照本發明第二實施例的一種控制訊號的時 序圖。請參照圖7，本領域具有通常知識者可以從第一實施例 的内容，而按照圖7所繪示之控制訊號的時序來推得圖6之發 光模組110的操作步驟，因此不再贅述。 第三實施例 請繼續參照圖6和圖7，在第三實施例中，驅動電路202 中的第一電晶體402、第三電晶體406和引流電晶體422可以 利用NMOS電晶體來實現，而第二電晶體404、第四電晶體 408和第五電晶體410則可以利用PM0S電晶體來實現。如此 一來，本領域具有通常知識者只要將圖7中之控制訊號的時序 反相’就可以適用於第三實施例中的驅動電路2〇2。 綜上所述，由於本發明將發光二極體n2的陽極透過一開 關耦接至固定的第二電位，並且此開關會在放電操作週期期間 導通。因此，本發明就可以使漏電流循著開關導通的路徑流 過，而越過發光二極體112，以解決誤發光的問題。 雖然本發明已以較佳實施例揭露如上，然其並非用以限定 201133447 本發明，任何熟習此技藝者，在 _ 内’當可作些許之更祕潤飾，因本發明之精神和_ 附之申請專利範騎界定者為/此本發明之保護範圍當視後 【圖式簡單說明】 的系Ϊ方1^不為依照本發明之—較佳實施㈣一種顯示裝置 方塊Ξ。2纟1^為紐本發明之—較佳的—種發光模組的電路Vrefl, Vref2, VDD, and VSS. Continuing to refer to FIG. 1 , the illumination source 104 has at least one illumination module. In this embodiment, the illumination source 104 has a plurality of illumination modules 110, and the illumination modules 110 are arranged in an array. Essentially, each of the illumination modules 110 in the illumination source 104 is a single pixel. In addition, each of the light-emitting modules n 具有 has a light-emitting diode 112 . When each of the light-emitting diodes 112 is driven by a corresponding driving current, it is respectively illuminated. The gray level of each pixel is related to the driving current driving each of the light-emitting diodes. In some embodiments, these light emitting diodes 112 can be implemented using organic light emitting diodes. 2 is a circuit block diagram of a preferred light emitting module in accordance with one embodiment of the present invention; and FIG. 3 is a flow chart showing the steps of a method for operating a light emitting diode in accordance with a preferred embodiment of the present invention. Referring to FIG. 2 and FIG. 3, in the light-emitting module 110, a driving circuit 202 can be electrically coupled to the anode of the light-emitting diode 112 as described in step S302, and can be timely drive. In the present embodiment, the driving circuit can receive the power output from the power supply device 102 of Fig. 1, for example, the operating voltage Vref1. In addition, the driving circuit 202 can also receive a data signal v_Data and can receive a plurality of control signals ', such as control signals VN1, VN2 and VEM. Then, as described in step S304, the cathode of the light emitting diode can be electrically coupled to the operating voltage VSS. In this embodiment, the voltage signal VSS has a fixed first potential. On the other hand, the anode of the LED 112 can be electrically coupled to the operating voltage Vref2 through a switch 204 as described in step S306. 201133447 ^A working voltage Vref2 has a fixed second potential, and the second potential is not the same as the potential. In particular, the sum of the absolute value of the voltage across the switch and the second M4 will be less than the sum of the first potential and the starting voltage of the light-emitting diode. In addition, the operation of the i-switch 2〇4 can be as described in the step s3〇8, during the period of the drive 202, during the partial period, for example, the discharge operation period, the switch 204 is turned on, and the light-emitting diode 112 is made. Rendered off. When L is in the discharge operation period, if the drive circuit 202 generates a leakage current, the switch 204 is turned on, and the leakage current can be passed over the light-emitting diode 112. The first embodiment, 4 is a circuit diagram of a light-emitting module according to an embodiment of the invention. Referring to FIG. 4, in the embodiment, the driving circuit 2〇2 includes a first transistor 402 and a second transistor 4. 〇4, a third transistor 4〇6, a fourth transistor, a fifth transistor 410, and a capacitor 412. The first path end of the first transistor 4〇2 electrically consumes the data signal V-Data, and its control is controlled by the first control signal. In addition, the second path end of the first-transistor 4〇2 is electrically connected to the control end of the second transistor 404 through the capacitor 412, and the second path end of the first transistor 4〇2 is electrically coupled. Connected to the first path end of the fourth transistor 4〇8. The second path end and the control end of the fourth transistor 408 electrically consume the working voltage Vref1 and the third control signal VEM, respectively. The first path end of the second transistor 404 is electrically coupled to the operating voltage VDD' and the second path end is electrically coupled to the first transistor end of the third transistor 4〇6 and the fifth transistor 410. The control terminal of the third transistor is electrically connected to the second control signal VN2' and the second terminal of the third transistor is electrically coupled to the control terminal of the second transistor 404. On the other hand, the control terminal of the fifth transistor 41A is electrically connected to the control condition number VEM, and the second path is electrically connected to the anode of the body 112 of the light-emitting diode 201133447. Referring to FIG. 4, the switch 2〇4 can also be implemented by using a drain transistor 422. The first path end of the draining transistor 422 is electrically coupled to the anode of the light emitting diode 112, and the control end and the second path end of the draining transistor are electrically connected to the first control signal VN2. And work electricity is willing to vref2. Thus, the degree of conduction of the first channel end and the second channel end of the draining transistor 422 is determined by the potential of the control terminal of the draining transistor 422. In particular, when the drain transistor 422 is turned on, the sum of the absolute value of the voltage between the first path end and the second path end of the bow current transistor and the second potential of the operating voltage Vref2 is less than the operating voltage Vref1. The sum of the first potential and the starting voltage of the light-emitting diode 112 in the present embodiment 'the transistors 402, 404, 406, 408, 410 and 422 may both be PMOS transistors. The timing of the control signal in Fig. 4 will be described below by taking a PM〇s transistor as an example. Figure 5 is a timing diagram of a control signal in accordance with a first embodiment of the present invention. Referring to FIG. 4 and FIG. 5, during the discharge operation period P1, the first control signal VN1 is in a high state, and the second control signal VN2 and the third control signal VEM are both in a low state, thus causing the first transistor 4〇. 2 is turned off, and the third transistor 406, the fourth transistor 408, the fifth transistor 410, and the drain transistor 422 are all turned on. At this time, the charge originally stored in the capacitor 412 is discharged along the path PA1 of the third transistor 406 to the fifth transistor 410, thereby generating a current on the path PA1. At this time, due to the sum of the absolute value of the voltage between the first path end and the second path end of the drain transistor 422 and the second potential of the working voltage, the first potential and the light emitting diode of the working voltage Vref1 are smaller than the second potential of the operating voltage Vref1. The sum of the starting voltages of the bodies, so the light-emitting diodes 112 are not turned on. In other words, the current generated on the path PA1 at this time will flow over the light-emitting diodes 112, 201133447 and flow through the drain transistors 422. Therefore, there is no possibility of false illumination. During the previous write operation period P2, the first control control signal VN1 will switch to the low state; the second control signal VN2 will remain in the low state; and the third control signal VEM will switch to the high state. Therefore, the first transistor 4, the third transistor 406, and the drain transistor 422 are both turned on, and the fourth transistor 408 and the fifth transistor 410 are turned off. At this time, the data signal v_Data is input from the first path end of the first transistor 402 to the light emitting module 11A, and the capacitor 412 is stored from the second path end of the first transistor 402 to store the potential of the data signal v_Data. Then, during the subsequent write operation period P3, the first control signal VN1 and the second control signal VEM maintain the original state, and the second control signal VN2 switches from the low state to the high state, thereby causing the third transistor. And the draining transistor 422 will be turned off. This causes the potential stored in the capacitor 412 to be locked to the potential of the data signal V_Data. During the lighting operation period P4, the first control signal VN1 and the third control signal VEM are respectively switched to the high state and the low state, and the second control signal is maintained at the high state. Therefore, the first transistor 4〇2, the third transistor 4〇6, and the drain transistor 422 are turned off, and the fourth transistor and the fifth transistor 41〇 are turned on. At this time, the second transistor is generated by the electric street stored in the capacitor 412, and the driving current is driven by the fifth transistor "o" to drive the light-emitting diode 112 to emit light. As can be seen from FIG. The first control signal view and the third control signal are mutually inverted. Therefore, with this characteristic, the first control signal and the third control city VEM can be replaced with each other. The following discloses another embodiment to illustrate How to use less control signals to control the driving circuit. 201133447 Second Embodiment FIG. 6 is a circuit diagram of a lighting module according to a second embodiment of the present invention. Referring to FIG. 6, the embodiment and the first implementation The difference in the example is that the fourth transistor 408 and the fifth transistor 410 can be implemented by using an NMOS transistor, and the first transistor 402, the second transistor 406, the third transistor 408, and the drain transistor 422 are still The PMOS transistor is implemented. In this way, the first control signal VN1 can be replaced by the third control signal VEM in the first embodiment, and sent to the control terminals of the fourth transistor 408 and the fifth transistor 410. Figure 7 is a timing diagram of a control signal according to a second embodiment of the present invention. Referring to Figure 7, the person skilled in the art can refer to the content of the first embodiment, according to Figure 7. The timing of the control signal is shown to derive the operation steps of the light-emitting module 110 of FIG. 6, and therefore will not be described again. Third Embodiment Please continue to refer to FIG. 6 and FIG. 7. In the third embodiment, the driving circuit 202 The first transistor 402, the third transistor 406, and the drain transistor 422 can be implemented by using an NMOS transistor, and the second transistor 404, the fourth transistor 408, and the fifth transistor 410 can utilize a PMOS transistor. In this way, those skilled in the art can apply the driving circuit 2〇2 in the third embodiment by simply inverting the timing of the control signals in FIG. 7. In summary, the present invention The anode of the light-emitting diode n2 is coupled to a fixed second potential through a switch, and the switch is turned on during the discharge operation period. Therefore, the present invention can cause the leakage current to flow through the path of the switch conduction. More The light-emitting diode 112 is used to solve the problem of false illumination. Although the invention has been disclosed in the preferred embodiment as above, it is not intended to limit the invention of 201133447, and anyone skilled in the art may make some More delicate retouching, because the spirit of the present invention and the patent application van derby defined as / the scope of protection of the present invention is not in accordance with the present invention - (4) A display device block Ξ. 2纟1^ is a circuit of the invention - preferably a light-emitting module
體之之—魏實施綱—種發光二極 遐之刼作方法的步驟流程圖。 路圖圖4繪示為依照本發明第—實施例的一種發光模組的電 序圖圖5繪示為依照本發明第1施例的一種控制訊號的時 路圖。田曰不為依照本發明第二實施例的一種發光模組的電 序圖圖曰不為依照本發明第二實施例的一種控制訊號的時 【主要元件符號說明】 1〇〇:顯示裝置 102 :電源供應裝置 1〇4 :發光源 u〇 :發光模組 112 :發光二極體 202 :驅動電路 2〇4 :開關 m 11 201133447 402、404、406、408、410、422 :電晶體 412 :電容 P1 :放電操作週期 P2、P3 :寫入操作週期 P4 :發光操作週期 PA1 :路徑 V_Data :資料訊號 VN1、VN2、VEM :控制訊號 Vrefl、Vref2、VDD、VSS :工作電壓 > S302、S304、S306、S308 :發光二極體之操作方法的步 驟流程The flow chart of the method of the method of the body - the implementation of the Wei - the illuminating two poles. FIG. 4 is a timing diagram of a lighting module according to a first embodiment of the present invention. FIG. 5 is a timing diagram of a control signal according to a first embodiment of the present invention. The electric sequence diagram of the light-emitting module according to the second embodiment of the present invention is not a control signal according to the second embodiment of the present invention. [Main component symbol description] 1: display device 102 Power supply device 1〇4: illumination source u〇: illumination module 112: light-emitting diode 202: drive circuit 2〇4: switch m 11 201133447 402, 404, 406, 408, 410, 422: transistor 412: Capacitor P1: discharge operation period P2, P3: write operation period P4: light-emitting operation period PA1: path V_Data: data signal VN1, VN2, VEM: control signals Vrefl, Vref2, VDD, VSS: operating voltage > S302, S304, S306, S308: Step flow of the operation method of the light-emitting diode
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