TWI746107B - 用於有機發光二極體觸控面板的控制方法及其驅動裝置 - Google Patents

用於有機發光二極體觸控面板的控制方法及其驅動裝置 Download PDF

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TWI746107B
TWI746107B TW109126813A TW109126813A TWI746107B TW I746107 B TWI746107 B TW I746107B TW 109126813 A TW109126813 A TW 109126813A TW 109126813 A TW109126813 A TW 109126813A TW I746107 B TWI746107 B TW I746107B
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organic light
emitting diode
touch
cathode layer
driving device
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TW202109491A (zh
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周俊義
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聯詠科技股份有限公司
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Abstract

一種控制方法，用於一觸控及有機發光二極體(Organic Light-Emitting Diode，OLED)驅動裝置，用來控制一有機發光二極體觸控面板，該有機發光二極體觸控面板具有一暗屏模式及一正常顯示模式，並包含有機發光二極體的一陰極層。該控制方法包含有在該暗屏模式下的一觸控感測期間內，施加一第一抗負載驅動(Load-Free Driving，LFD)訊號於該陰極層或控制該陰極層為浮空(floating)狀態；以及在該正常顯示模式下，施加一恆定電壓於該陰極層。

Description

用於有機發光二極體觸控面板的控制方法及其驅動裝置
本發明係指一種用於有機發光二極體(Organic Light-Emitting Diode，OLED)面板的控制方法，尤指一種用於有機發光二極體觸控面板的控制方法及其觸控及有機發光二極體驅動裝置。
請參考第1圖，第1圖為一般有機發光二極體(Organic Light-Emitting Diode，OLED)面板10之示意圖。第1圖簡要繪示具有上發光(top emission)結構的有機發光二極體面板10之側視圖。如第1圖所示，有機發光二極體面板10包含有一基板100、一有機發光二極體層102、一封裝層104及一偏光片(polarizer)106。有機發光二極體面板10另可包含一上基板(未繪示)，設置於偏光片106上方。基板100可以是玻璃基板或可撓性基板，基板100上設置有薄膜電晶體(Thin-Film Transistor，TFT)。每一顯示畫素可包含一驅動薄膜電晶體及一有機發光二極體(可設置於有機發光二極體層102)，其共同運作以控制顯示畫素進行發光。封裝層104及上基板可用來保護內部電路並將電路與空氣隔離，以避免電路元件及導線受到氧化。偏光片106可用來進行濾波及導光，使得每一畫素顯示預定顏色。
第2圖繪示一示例性有機發光二極體觸控面板20的結構，有機發光二極體觸控面板20可以是具有表面式觸控感測器(on-cell touch sensor)的一般有機發光二極體面板。第2圖繪示了表面式可撓性面板結構之側視圖。如第2圖所示，有機發光二極體觸控面板20包含有一基板200、一有機發光二極體層202、一封裝層204，一觸控感測層205、一偏光片206及一覆蓋窗(cover window)208。對於可撓性結構而言，基板200可由聚醯亞胺(Polyimide，PI)來實現，薄膜電晶體則設置於聚醯亞胺基板200上。觸控感測層205可包含鍍在薄膜上的觸控感測電極，為避免影響影像顯示，觸控感測電極可由透明材料來實現，例如氧化銦錫(Indium Tin Oxide，ITO)。除此之外，關於有機發光二極體層202、封裝層204及偏光片206的實施及運作方式皆類似於第1圖中的有機發光二極體層102、封裝層104及偏光片106。覆蓋窗208可視為上基板，其具有格狀或窗形結構，可穿透光線以顯示欲顯示的影像。在此例中，觸控感測層205可設置於封裝層204上，而偏光片206及覆蓋窗208可設置於觸控感測層205上，例如透過光學膠(Optically Clear Adhesive，OCA)來貼合。
由於面板尺寸的輕薄短小趨勢，可將觸控感測電極整合入面板的封裝層內。第3圖繪示一示例性有機發光二極體觸控面板30的結構，其中，觸控感測器係整合於封裝層。有機發光二極體觸控面板30包含有一基板300、一有機發光二極體層302、具有觸控感測器的一封裝層304、一偏光片306及一覆蓋窗308。關於基板300、有機發光二極體層302、偏光片306及覆蓋窗308的實施及運作方式皆類似於第2圖中的基板200、有機發光二極體層202、偏光片206及覆蓋窗208。有機發光二極體觸控面板30與有機發光二極體觸控面板20之間的差異在於，在有機發光二極體觸控面板30中，觸控感測器可藉由線上製程(in-line process)整合入封裝層304。詳細來說，封裝層304內的封裝材料可包含非導電 材料，如有機材料或氧化矽等，這些材料一層一層疊合而形成完整的封裝層304。觸控感測器可包含金屬網格，用來構成觸控感測電極圖案，在製造過程中，可將觸控感測電極鍍在封裝層304內部的一或多個子層上，以將觸控感測器整合入封裝層304。
值得注意的是，整合觸控感測器的封裝層304之厚度相當薄。舉例來說，從封裝層304頂端至基板300的垂直距離大約等於10微米(micrometer，μm)，如第3圖所示。在如此短的距離之下，通過面板周邊將觸控控制線從觸控感測器連到設置於基板300上的觸控控制積體電路(Integrated Circuit，IC)310是相當容易的。再者，顯示控制線(如掃描線或資料線)通過面板周邊的連接線從有機發光二極體層302連到設置於基板300上的顯示控制積體電路320亦相當容易。在此情況下，可輕易將顯示控制積體電路320與觸控控制積體電路310整合，以實現觸控顯示驅動整合(Touch and Display Driver Integration，TDDI)。相較之下，在第2圖所示的有機發光二極體觸控面板20上，包含有薄膜層的觸控感測層205厚度約為100微米，因而需要較寬的邊界來繞行欲到達觸控控制積體電路210的觸控控制線。若欲在基板200上整合觸控控制積體電路210與顯示控制積體電路220時，其繞線距離將變得相當長，因而需要更寬的邊界。在此情形下，相較於習知有機發光二極體觸控面板20而言，有機發光二極體觸控面板30更容易實現觸控感測整合之結構，因而更適用於如行動電話或穿戴式裝置等小尺寸面板之應用。
然而，在有機發光二極體觸控面板30中，觸控感測器與有機發光二極體層302的陰極十分接近，使得觸控感測器存在巨大的電容性負載。在一範例中，其電容性負載可能高達500~1000皮法(picofarad，pF)。再者，由於觸控感 測器與面板的資料線及掃描線之間的間距極短，亦具有較大的電容性負載，較大的電容性負載會在觸控驅動及感測上產生較大負擔，使得觸控驅動/感測操作需消耗更多電力來克服負載。而隨著面板尺寸及解析度的提高，在大尺寸面板上往往設置有更多的觸控感測走線，造成耗電量更加提升。
需注意的是，無論在顯示過程中或者暗屏之下，觸控面板的觸控感測功能皆可能被啟用。舉例來說，行動電話通常配備有觸控喚醒功能，其可在暗屏模式下偵測一特定觸控手勢來喚醒裝置。一般來說，通常需要將暗屏模式的耗電降到最低以提升裝置的待機時間，然而，即使面板上無任何觸控事件發生，仍有必要週期性進行觸控偵測，其在巨大的電容性負載之下造成無法忽略的電力消耗，這些因電容性負載造成的觸控偵測的額外耗電將導致電子裝置的待機時間下降。有鑑於此，習知技術實有改進之必要。
因此，本發明之主要目的即在於提供一種可用於有機發光二極體(Organic Light-Emitting Diode，OLED)觸控面板的控制方法，以解決上述問題。
本發明的一實施例揭露一種控制方法，用於一觸控及有機發光二極體驅動裝置，用來控制一有機發光二極體觸控面板。該有機發光二極體觸控面板具有一暗屏模式及一正常顯示模式，並包含有機發光二極體的一陰極層。該控制方法包含有：在該暗屏模式下的一觸控感測期間內，施加一第一抗負載驅動(Load-Free Driving，LFD)訊號於該陰極層或控制該陰極層為浮空(floating)狀態；以及在該正常顯示模式下，施加一恆定電壓於該陰極層。
本發明的另一實施例揭露一種觸控及有機發光二極體驅動裝置，該觸控及有機發光二極體驅動裝置用來控制一有機發光二極體觸控面板。該有機發光二極體觸控面板具有一暗屏模式及一正常顯示模式，並包含有機發光二極體的一陰極層。該觸控及有機發光二極體驅動裝置用來執行以下步驟：在該暗屏模式下的一觸控感測期間內，施加一第一抗負載驅動訊號於該陰極層或控制該陰極層為浮空狀態；以及在該正常顯示模式下，施加一恆定電壓於該陰極層。
10,500:有機發光二極體面板
20,30:有機發光二極體觸控面板
100,200,300:基板
102,202,302:有機發光二極體層
104,204,304:封裝層
106,206,306:偏光片
205:觸控感測層
208,308:覆蓋窗
210,310:觸控控制積體電路
220,320:顯示控制積體電路
400:觸控面板
Tx1~Txm:驅動電極
Rx1~Rxn:感測電極
402:觸控控制器
50:顯示系統
502:觸控及有機發光二極體驅動裝置
504:閘極驅動裝置
510:電源供應器
T1,T2:電晶體
Cs:儲存電容
O1:有機發光二極體
VDD,VSS:電源供應電壓
520:內部電源供應器
530:控制邏輯電路
VGH,VGL:閘極控制訊號
70:控制流程
700~706:步驟
第1圖為一般有機發光二極體面板之示意圖。
第2圖繪示一示例性有機發光二極體觸控面板的結構。
第3圖繪示一示例性有機發光二極體觸控面板的結構，其觸控感測器係整合於封裝層。
第4圖為本發明實施例一觸控面板之示意圖。
第5圖為本發明實施例一顯示系統之示意圖。
第6圖為操作在低功耗模式的顯示系統之示意圖。
第7圖為本發明實施例一控制流程之流程圖。
第8圖為第5圖中的顯示系統的相關訊號之示例性波形圖。
第9圖為操作在暗屏模式下的觸控感測期間的顯示系統之示意圖。
請參考第4圖，第4圖為本發明實施例一觸控面板400之示意圖。如第4圖所示，觸控面板400包含有一觸控感測器，其具有複數個觸控感測電極。詳細來說，觸控感測電極可包含設置於一層的複數個驅動電極Tx1~Txm以及設置 於另一層的複數個感測電極Rx1~Rxn，此處所描述的一層可以是封裝層304中包含的一子層，如第3圖所示。驅動電極Tx1~Txm可以是條狀結構之電極，其沿著垂直方向設置；感測電極Rx1~Rxn可以是條狀結構之電極，其沿著水平方向設置。每一電極皆連接到一觸控控制器402，觸控控制器402可作為積體電路(Integrated Circuit，IC)而位於晶片中。
為進行觸控偵測，觸控控制器402可發送一觸控驅動訊號(如方波訊號)至每一驅動電極Tx1~Txm，觸控控制器402另包含一接收器，用來接收來自於觸控面板400的觸控感測訊號。詳細來說，當觸控驅動訊號被傳送至驅動電極Tx1~Txm時，接收器可對應從感測電極Rx1~Rxn接收觸控感測訊號，進而實現互容式(mutual capacitance)觸控感測。在另一實施例中，當觸控驅動訊號被傳送至驅動電極Tx1~Txm時，接收器可對應從相同的驅動電極Tx1~Txm接收觸控感測訊號，進而實現自容式(self-capacitance)觸控感測。或者，觸控驅動訊號可被傳送至電極Rx1~Rxn而觸控感測訊號可從電極Tx1~Txm接收，意即電極Rx1~Rxn可視為驅動電極而電極Tx1~Txm可視為感測電極。所接收的感測訊號可反映因觸控手勢而在驅動電極及/或感測電極上產生的電容變化。
請參考第5圖，第5圖為本發明實施例一顯示系統50之示意圖。如第5圖所示，顯示系統50包含有一有機發光二極體(Organic Light-Emitting Diode，OLED)面板500、一觸控及有機發光二極體驅動裝置502、一閘極驅動裝置504及一電源供應器510。有機發光二極體面板500可以是一主動矩陣式有機發光二極體(Active-Matrix OLED，AMOLED)面板，其包含有配置為陣列的複數個顯示畫素。為求簡化，第5圖僅繪示單一顯示畫素。顯示畫素包含有電晶體(如薄膜電晶體(Thin-Film Transistor，TFT))T1及T2、一儲存電容Cs及一有機發光二 極體O1。當顯示畫素接收到電源供應電壓VDD及VSS時，透過接收來自於資料線的顯示資料以及藉由來自於掃描線的掃描訊號的控制，顯示畫素可顯示預定亮度。在一實施例中，電源供應電壓VDD可以是例如4V至5V之間的正電壓，而電源供應電壓VSS可以是例如-3V至-1V之間的負電壓。觸控及有機發光二極體驅動裝置502可根據有機發光二極體面板500的整體耗電量，調整實際的電源供應電壓VDD及/或VSS的大小。在畫素的顯示操作期間，所接收的顯示資料可儲存於儲存電容Cs，且電晶體T2可將顯示資料轉換為電流，此電流可通過有機發光二極體O1以控制其進行發光，發光的強度則對應於電流大小。
在有機發光二極體面板500中，每一顯示畫素皆具有如第5圖所示的相似結構。每一顯示畫素中的有機發光二極體的陰極皆實現於如第3圖所示的陰極層上，並共同連接至同一個電源供應節點。更明確來說，這些陰極共同連接至電源供應器510以接收電源供應電壓VSS。
請繼續參考第5圖，觸控及有機發光二極體驅動裝置502可用來傳送顯示資料至有機發光二極體面板500上的顯示畫素，並輸出閘極控制訊號VGH及VGL至閘極驅動裝置504。在一實施例中，觸控及有機發光二極體驅動裝置502可以是具有觸控及顯示控制功能的一控制積體電路，也就是說，觸控及有機發光二極體驅動裝置502可包含如第4圖所示的觸控控制器402。觸控及有機發光二極體驅動裝置502另可包含一內部電源供應器520及控制邏輯電路530。內部電源供應器520可用來供應觸控及有機發光二極體驅動裝置502內部所需電源，亦可提供電源予有機發光二極體面板500。控制邏輯電路530可分別傳送閘極控制訊號VGH及VGL以及顯示資料電壓，以控制閘極驅動裝置504並控制有機發光二極體面板500上的顯示畫素，進而實現顯示操作。
當閘極驅動裝置504接收到閘極控制訊號VGH及VGL時，可透過掃描線傳送掃描訊號，以控制顯示畫素一列一列開啟。閘極驅動裝置504可整合於觸控及有機發光二極體驅動裝置502，或者實作在有機發光二極體面板500的基板上以實現閘極陣列驅動(Gate-On-Array，GOA)結構。電源供應器510可以是獨立於觸控及有機發光二極體驅動裝置502的外部電源供應器。在一實施例中，電源供應器510可以是一直流對直流轉換器(DC-to-DC converter)，可供應直流電源給有機發光二極體面板500。
第5圖繪示正常顯示模式，其中，有機發光二極體面板500可正常顯示影像。在正常顯示模式下，電晶體T2及有機發光二極體O1皆耦接於電源供應器510，因此，顯示畫素可從電源供應器510接收電源供應電壓VDD及VSS。第6圖繪示操作在低功耗模式(如息屏顯示(Always On Display，AOD)模式)的顯示系統50。在息屏顯示模式下，有機發光二極體面板500可在畫面一小塊區域顯示小型圖案，其可包含使用者定義的資訊，例如日期、時間、及/或電量等，因此，有機發光二極體面板500在息屏顯示模式下所需的整體電流及電量消耗遠低於正常顯示模式下的耗電量。在此情況下，電源供應器510可關閉，並將顯示畫素中的電晶體T2及有機發光二極體O1耦接至觸控及有機發光二極體驅動裝置502的內部電源供應器520而不耦接至電源供應器510，以從內部電源供應器520接收電源供應電壓VDD及VSS。這是因為電源供應器510(如直流對直流轉換器)在輕載應用下的效率較差，因此應採用更適合的電源供應裝置(如包含在觸控及有機發光二極體驅動裝置502內的電荷泵(charge pump))來進行供電。
在此情形下，無論在正常顯示模式或息屏顯示模式之下，有機發光 二極體面板500的電源節點(特別是陰極層)皆耦接至一特定電源供應器以接收直流電源電壓。除了正常顯示模式及息屏顯示模式之外，有機發光二極體面板500亦可操作於暗屏模式(dark screen mode)或黑屏模式(black screen mode)。在暗屏模式或黑屏模式之下，有機發光二極體面板500未顯示任何影像，即有機發光二極體面板500的顯示功能關閉。在此情況下，顯示系統50可位於待機模式或閒置模式，上述操作模式在下文中統稱為暗屏模式。需注意的是，在暗屏模式下，觸控及有機發光二極體驅動裝置502仍可偵測觸控事件以進行觸控喚醒功能，換句話說，觸控及有機發光二極體驅動裝置502可週期性地發送觸控訊號至有機發光二極體面板500，以偵測是否存在觸控事件，並在偵測到一特定觸控手勢時判斷是否喚醒裝置。
如上所述，在有機發光二極體觸控面板上，觸控感測器中的觸控感測電極十分接近陰極層，導致巨大的電容性負載，電容性負載使得觸控操作需要更多耗電，造成顯示系統50的待機時間下降。
請參考第7圖，第7圖為本發明實施例一控制流程70之流程圖。控制流程70可實現於一觸控及有機發光二極體驅動裝置(例如第5圖或第6圖中的觸控及有機發光二極體驅動裝置502)，用來控制具有有機發光二極體陰極層的有機發光二極體觸控面板。如第7圖所示，控制流程70包含有以下步驟：
步驟700：開始。
步驟702：在暗屏模式下的一觸控感測期間內，施加一第一抗負載驅動訊號於陰極層或控制陰極層為浮空(floating)狀態。
步驟704：在正常顯示模式下，施加一恆定電壓於陰極層。
步驟706：結束。
根據控制流程70，觸控及有機發光二極體驅動裝置502可在暗屏模式下的觸控感測期間內施加抗負載驅動訊號於有機發光二極體面板500上的有機發光二極體的陰極層，抗負載驅動訊號相同於傳送至觸控感測器的觸控驅動訊號。舉例來說，抗負載驅動訊號的脈衝及觸控驅動訊號的脈衝可具有大致相同的頻率、相位、及/或振幅，使得抗負載驅動訊號與觸控驅動/感測訊號同步上升及下降。或者，觸控及有機發光二極體驅動裝置502可控制有機發光二極體的陰極層在觸控感測期間內處於浮空狀態，由於陰極與觸控感測器之間的耦合電容，浮空狀態使得陰極電壓隨著觸控訊號的脈衝而向上或向下移位。陰極為浮空狀態代表陰極的每一端僅連接至高阻抗節點，或者陰極的任何外接連線皆斷開。
抗負載驅動訊號可在觸控訊號被傳送至觸控感測器時施加於陰極層，能有效消除或降低陰極層及觸控感測電極之間的電容性負載。當完全相同於觸控驅動訊號的抗負載驅動訊號在觸控訊號傳送期間施加於陰極時，由於抗負載驅動訊號與觸控訊號同步上升及下降，使得陰極層與觸控感測器之間的電壓差維持恆定。在此情況下，陰極層及觸控感測器之間的耦合電容將不會偵測到任何電壓差的變化，等效上相同於無任何耦合電容存在。
在此例中，施加於陰極層的抗負載驅動訊號可消除或降低陰極層與觸控感測器之間的電容性負載。可替換地或額外地，在暗屏模式下的觸控感測期間內，觸控及有機發光二極體驅動裝置502另可施加一第二抗負載驅動訊號於有機發光二極體面板500的資料線及/或掃描線，及/或控制有機發光二極體面板500的資料線及/或掃描線為浮空狀態。請回頭參考第5及6圖，其中，每一顯 示畫素皆耦接於一條資料線及一條掃描線，因此，對於所有的顯示畫素而言，有機發光二極體面板500上可能存在數百或數千條資料線及掃描線。資料線及掃描線可設置於有機發光二極體面板500的基板上，例如第3圖所示的基板300，因此，在有機發光二極體觸控面板30的結構之下，這些資料線及掃描線亦十分接近面板的陰極層，使得陰極與任一條資料線或掃描線之間皆存在巨大的電容性負載。因此，資料線及掃描線也會在觸控感測器上產生無法忽略的電容性負載，使得觸控感測操作需要更多耗電。在此情況下，應在資料線及/或掃描線上施加抗負載驅動訊號，或控制資料線及/或掃描線浮空，以消除或降低電容性負載。
在本發明的實施例中，施加抗負載驅動訊號以及控制浮空的方法可彈性地進行設定。舉例來說，可控制一或多條資料線接收抗負載驅動訊號，並控制其它資料線為浮空狀態；亦可控制一或多條掃描線接收抗負載驅動訊號，並控制其它掃描線為浮空狀態。實際上，根據面板的負載條件等各種原因，抗負載驅動及/或浮空的手段可選擇性地且彈性地應用在陰極層、資料線及掃描線之任一或多者。
值得注意的是，當觸控感測在暗屏模式下進行時，可採用輸出抗負載驅動訊號及浮空控制的方式，然而，抗負載驅動及浮空操作無法應用於顯示模式，這是因為在陰極、資料線或掃描線上施加的抗負載驅動訊號及浮空控制可能影響顯示的影像。舉例來說，若將一抗負載驅動訊號施加於陰極、資料線或掃描線當中任一者，由於畫素電壓的變化將導致觸控感測期間內顯示的影像出現閃爍。
請參考第8圖，第8圖為顯示系統50的相關訊號之示例性波形圖。如第8圖所示，顯示操作包含有一顯示期間及一暗屏期間，其中，顯示期間可以是任何類型的顯示模式，例如正常顯示模式或息屏顯示模式。觸控操作可在顯示期間及暗屏期間內週期性出現的觸控感測期間進行。在此例中，觸控訊號(驅動或感測訊號)係由方波組成，但本領域具通常知識者應了解，觸控訊號亦可透過其它方式實現，例如由弦波訊號、三角波脈衝或梯形波脈衝組成。
在顯示期間內，依據觸控及有機發光二極體驅動裝置502的控制，陰極層可接收位於-3V到-1V之間的負電源供應電壓VSS，源極線用來接收資料電壓並傳送資料電壓至目標畫素，掃描線則用來傳送閘極控制訊號以依序開啟目標畫素。如上所述，在顯示期間內不執行抗負載驅動操作，以免影響影像顯示。
在暗屏期間內，陰極層、資料線及源極線均接收接地電壓(GND)，以控制面板上的有機發光二極體不發光以關閉顯示功能。在觸控感測期間內，觸控訊號以多個方波的形式上下切換，同時，具有相同方波脈衝的抗負載驅動訊號可傳送至陰極層、資料線及/或掃描線(方法1)，或者，可控制陰極層、資料線及/或掃描線為浮空狀態(即高阻抗(Hi-Z)狀態)(方法2)。如此一來，藉由抗負載驅動訊號及/或浮空控制即可降低電容性負載。
上述施加抗負載驅動訊號及浮空控制的方法可透過觸控及有機發光二極體驅動裝置502來實現。如第9圖所示，在暗屏模式下的觸控感測期間，可將有機發光二極體的陰極耦接至控制邏輯電路530，使得控制邏輯電路530可發送抗負載驅動訊號至陰極或控制陰極浮空。同樣地，控制邏輯電路530亦可用來控制資料線及/或掃描線，使得資料線及/或掃描線可從控制邏輯電路530接收 抗負載驅動訊號，或藉由控制邏輯電路530的控制而處於浮空狀態。
值得注意的是，本發明實施例的目的在於提供一種在有機發光二極體觸控面板的陰極層、資料線及/或掃描線上施加抗負載驅動訊號及/或進行浮空控制的方法，以消除或降低觸控感測操作的電容性負載。本領域具通常知識者當可據以進行修飾或變化，而不限於此。舉例來說，本說明書所提供的有機發光二極體顯示畫素之結構僅為本發明眾多實施方式的一種，本領域具通常知識者應了解到，施加抗負載驅動訊號及/或浮空控制的方法可應用於具有任何畫素結構的有機發光二極體觸控面板。除此之外，在本發明的實施例中，一觸控及有機發光二極體驅動裝置可實現為位於晶片中的積體電路，或者亦可以是多個積體電路的組合。舉例來說，觸控及有機發光二極體驅動裝置可實現於一觸控顯示驅動整合(Touch and Display Driver Integration，TDDI)積體電路，或是由觸控控制積體電路及顯示控制積體電路組成的雙晶片解決方案。
綜上所述，本發明提供了一種用於有機發光二極體觸控面板的控制方法。在新式的表面式(on-cell)有機發光二極體觸控面板之結構中，觸控感測器的觸控感測電極十分接近有機發光二極體的陰極層，因而產生巨大的電容性負載，導致觸控驅動及感測操作需消耗更多電力。為解決此問題，本發明的觸控及有機發光二極體驅動裝置可施加一抗負載驅動訊號於陰極，及/或控制陰極為浮空狀態。除此之外，由於觸控感測電極與資料線及/或掃描線之間亦可能存在巨大的電容性負載，因此亦可將一抗負載驅動訊號施加於有機發光二極體面板的資料線及/或掃描線(或者可控制資料線及/或掃描線為浮空狀態)。抗負載驅動操作及/或浮空控制可在暗屏模式下的觸控感測期間內執行，進而延長暗屏下裝置的待機時間，同時不影響影像顯示。
以上所述僅為本發明之較佳實施例，凡依本發明申請專利範圍所做之均等變化與修飾，皆應屬本發明之涵蓋範圍。
70:控制流程
700~706:步驟

Claims (10)

  1. 一種控制方法，用於一觸控及有機發光二極體(Organic Light-Emitting Diode，OLED)驅動裝置，用來控制一有機發光二極體觸控面板，該有機發光二極體觸控面板具有一暗屏模式及一正常顯示模式，並包含有機發光二極體的一陰極層，該控制方法包含有：在該暗屏模式下的一觸控感測期間內，施加一第一抗負載驅動(Load-Free Driving，LFD)訊號於該陰極層或控制該陰極層為浮空(floating)狀態，以降低該暗屏模式下的耗電，其中，該有機發光二極體觸控面板在該暗屏模式下未顯示任何影像；以及在該正常顯示模式下，施加一恆定電壓於該陰極層。
  2. 如請求項1所述之控制方法，其中該有機發光二極體觸控面板另包含複數條資料線及複數條掃描線，且該控制方法另包含有：在該暗屏模式下的該觸控感測期間內，施加一第二抗負載驅動訊號於該複數條資料線及該複數條掃描線當中的至少一條導線，或控制該複數條資料線及該複數條掃描線當中的至少一條導線為浮空狀態。
  3. 如請求項1所述之控制方法，其中該暗屏模式為該有機發光二極體觸控面板的一顯示功能關閉之下的一操作模式。
  4. 如請求項1所述之控制方法，其中該有機發光二極體觸控面板另具有一息屏顯示(Always On Display，AOD)模式。
  5. 如請求項4所述之控制方法，其中在該息屏顯示模式下，該陰極 層耦接至該觸控及有機發光二極體驅動裝置的一內部電源供應器，而在該正常顯示模式下，該陰極層耦接至獨立於該觸控及有機發光二極體驅動裝置的一外部電源供應器。
  6. 一種觸控及有機發光二極體(Organic Light-Emitting Diode，OLED)驅動裝置，用來控制一有機發光二極體觸控面板，該有機發光二極體觸控面板具有一暗屏模式及一正常顯示模式，並包含有機發光二極體的一陰極層，該觸控及有機發光二極體驅動裝置用來執行以下步驟：在該暗屏模式下的一觸控感測期間內，施加一第一抗負載驅動(Load-Free Driving，LFD)訊號於該陰極層或控制該陰極層為浮空(floating)狀態，以降低該暗屏模式下的耗電，其中，該有機發光二極體觸控面板在該暗屏模式下未顯示任何影像；以及在該正常顯示模式下，施加一恆定電壓於該陰極層。
  7. 如請求項6所述之觸控及有機發光二極體驅動裝置，其中該有機發光二極體觸控面板另包含複數條資料線及複數條掃描線，且該觸控及有機發光二極體驅動裝置另用來執行以下步驟：在該暗屏模式下的該觸控感測期間內，施加一第二抗負載驅動訊號於該複數條資料線及該複數條掃描線當中的至少一條導線，或控制該複數條資料線及該複數條掃描線當中的至少一條導線為浮空狀態。
  8. 如請求項6所述之觸控及有機發光二極體驅動裝置，其中該暗屏模式為該有機發光二極體觸控面板的一顯示功能關閉之下的一操作模式。
  9. 如請求項6所述之觸控及有機發光二極體驅動裝置，其中該有機發光二極體觸控面板另具有一息屏顯示(Always On Display，AOD)模式。
  10. 如請求項9所述之觸控及有機發光二極體驅動裝置，其中在該息屏顯示模式下，該陰極層耦接至該觸控及有機發光二極體驅動裝置的一內部電源供應器，而在該正常顯示模式下，該陰極層耦接至獨立於該觸控及有機發光二極體驅動裝置的一外部電源供應器。
TW109126813A 2019-08-27 2020-08-07 用於有機發光二極體觸控面板的控制方法及其驅動裝置 TWI746107B (zh)

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