TWI710941B - Touch display apparatus - Google Patents
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Abstract
Description
本發明是有關於一種觸控技術，且特別是有關於一種觸控顯示裝置。The present invention relates to a touch technology, and particularly relates to a touch display device.
近幾年來，觸控功能逐漸成為許多生活應用不可或缺的一部分，尤其是搭載觸控顯示面板的行動裝置，例如智慧型手機、平板電腦，更是隨處可見。依據顯示面板與觸控技術的整合方式，觸控顯示技術的種類可分為外貼式（out-cell）、外嵌式（on-cell）及內嵌式（in-cell）。進一步而言，觸控感測技術依據不同的架構及驅動方式又可區分為自容式（self-capacitance）及互容式（mutual-capacitance），其中互容式觸控感測技術因具有多點觸控（multi-touch）感測的優勢，已成為觸控技術的主流。In recent years, touch functions have gradually become an indispensable part of many life applications, especially mobile devices equipped with touch display panels, such as smart phones and tablet computers, which are everywhere. According to the integration method of the display panel and the touch technology, the types of touch display technology can be divided into out-cell, on-cell, and in-cell. Furthermore, touch sensing technology can be divided into self-capacitance and mutual-capacitance based on different architectures and driving methods. Among them, mutual-capacitance touch sensing technology has many advantages. The advantages of multi-touch sensing have become the mainstream of touch technology.
隨著觸控顯示裝置的厚度尺寸逐漸縮減，例如可撓式觸控顯示裝置，所採用的軟性基板通常都具有較薄的厚度。當觸控表面存在具有浮置電位且非預期的導體（例如水滴）時，較薄的基板厚度使得此導體與顯示面板的導電層（例如畫素電極、訊號線）之間的電容耦合效應（capacitive coupling effect）增加，造成非預期的觸控訊號產生。因此，如何在滿足觸控顯示裝置的輕薄化需求下，提高觸控感測的準確率是相關廠商的重要課題之一。As the thickness of the touch display device is gradually reduced, such as a flexible touch display device, the flexible substrate used generally has a thinner thickness. When there is an unexpected conductor (such as water droplets) with a floating potential on the touch surface, the thinner substrate thickness causes the capacitive coupling effect between this conductor and the conductive layer of the display panel (such as pixel electrodes, signal lines) ( Capacitive coupling effect) increases, causing unexpected touch signals to be generated. Therefore, how to improve the accuracy of touch sensing while meeting the needs of thinner and lighter touch display devices is one of the important issues of related manufacturers.
本發明提供一種觸控顯示裝置，具有較佳的觸控性能。The present invention provides a touch display device with better touch performance.
本發明的觸控顯示裝置，具有觸控感測區。觸控顯示裝置包括多個第一電極、多個第二電極以及多個輔助電極。多個第一電極與多個第二電極設置於觸控感測區中。這些第一電極相交於這些第二電極並定義出多個開口。於觸控時間內，這些第一電極被輸入第一信號，這些第二電極被輸入第二信號。這些輔助電極設置於觸控感測區中，且重疊於這些開口。於觸控時間的第一時段內，這些輔助電極具有浮置電位。於觸控時間的第二時段內，這些輔助電極被輸入第三信號，且第一信號與第二信號的其中一者與第三信號於時序上同步。The touch display device of the present invention has a touch sensing area. The touch display device includes a plurality of first electrodes, a plurality of second electrodes, and a plurality of auxiliary electrodes. The plurality of first electrodes and the plurality of second electrodes are arranged in the touch sensing area. The first electrodes intersect the second electrodes and define a plurality of openings. During the touch time, the first electrodes are input with a first signal, and the second electrodes are input with a second signal. The auxiliary electrodes are arranged in the touch sensing area and overlap the openings. In the first period of the touch time, these auxiliary electrodes have floating potentials. In the second period of the touch time, the auxiliary electrodes are input with a third signal, and one of the first signal and the second signal and the third signal are synchronized in timing.
在本發明的一實施例中，上述的觸控顯示裝置於第二時段內，第一信號與第二信號的其中另一者為接地電位或固定電位。In an embodiment of the present invention, in the above-mentioned touch display device, during the second time period, the other of the first signal and the second signal is a ground potential or a fixed potential.
在本發明的一實施例中，上述的觸控顯示裝置於觸控時間的第三時段內，多個輔助電極被輸入第四信號，且第一信號與第二信號的其中另一者與第四信號於時序上同步。In an embodiment of the present invention, in the above-mentioned touch display device, during the third period of the touch time, a fourth signal is input to a plurality of auxiliary electrodes, and the other of the first signal and the second signal is The four signals are synchronized in timing.
在本發明的一實施例中，上述的觸控顯示裝置的觸控感測區具有第一區與第二區。多個輔助電極包括位於第一區的多個第一輔助電極以及位於第二區的多個第二輔助電極，且這些第一輔助電極電性獨立於這些第二輔助電極。In an embodiment of the present invention, the touch sensing area of the aforementioned touch display device has a first area and a second area. The plurality of auxiliary electrodes include a plurality of first auxiliary electrodes located in the first area and a plurality of second auxiliary electrodes located in the second area, and the first auxiliary electrodes are electrically independent of the second auxiliary electrodes.
在本發明的一實施例中，上述的觸控顯示裝置於第二時段內，多個第一輔助電極所傳遞的第三信號與多個第一電極所傳遞的第一信號於時序上同步，且多個第二輔助電極所傳遞的第三信號與多個第二電極所傳遞的第二信號為接地電位或固定電位。In an embodiment of the present invention, in the above-mentioned touch display device, in the second time period, the third signals transmitted by the plurality of first auxiliary electrodes and the first signals transmitted by the plurality of first electrodes are synchronized in time sequence. And the third signal transmitted by the plurality of second auxiliary electrodes and the second signal transmitted by the plurality of second electrodes are ground potential or fixed potential.
在本發明的一實施例中，上述的觸控顯示裝置於觸控時間的第三時段內，多個輔助電極被輸入第四信號，且第一信號與第二信號的其中另一者與第四信號為接地電位或固定電位。In an embodiment of the present invention, in the above-mentioned touch display device, during the third period of the touch time, a fourth signal is input to a plurality of auxiliary electrodes, and the other of the first signal and the second signal is The four signals are ground potential or fixed potential.
在本發明的一實施例中，上述的觸控顯示裝置，更包括畫素結構層。畫素結構層重疊設置於觸控感測區，且具有多個發光區。多個第一電極、多個第二電極以及多個輔助電極不重疊於畫素結構層的這些發光區。In an embodiment of the invention, the aforementioned touch display device further includes a pixel structure layer. The pixel structure layer is overlapped and arranged in the touch sensing area and has a plurality of light emitting areas. The plurality of first electrodes, the plurality of second electrodes, and the plurality of auxiliary electrodes do not overlap the light emitting regions of the pixel structure layer.
在本發明的一實施例中，上述的觸控顯示裝置的輔助電極具有多個第一延伸部與多個第二延伸部。這些第一延伸部與這些發光區在第一方向上交替排列，這些第二延伸部與這些發光區在第二方向上交替排列，且第一方向相交於第二方向。In an embodiment of the present invention, the auxiliary electrode of the aforementioned touch display device has a plurality of first extension portions and a plurality of second extension portions. The first extension portions and the light-emitting regions are alternately arranged in a first direction, and the second extension portions and the light-emitting regions are alternately arranged in a second direction, and the first direction intersects the second direction.
在本發明的一實施例中，上述的觸控顯示裝置，更包括電性連接於多個輔助電極之間的多個連接電極。第一電極與第二電極的其中一者與這些連接電極屬於同一膜層。In an embodiment of the present invention, the above-mentioned touch display device further includes a plurality of connection electrodes electrically connected between the plurality of auxiliary electrodes. One of the first electrode and the second electrode belongs to the same film layer as the connecting electrodes.
在本發明的一實施例中，上述的觸控顯示裝置的第一電極與第二電極的其中另一者與多個輔助電極屬於同一膜層。In an embodiment of the present invention, the other one of the first electrode and the second electrode of the aforementioned touch display device and the plurality of auxiliary electrodes belong to the same film layer.
基於上述，在本發明一實施例的觸控顯示裝置中，透過在觸控感測區未設有第一電極與第二電極的區域內設置輔助電極，且於觸控時間內，此輔助電極所傳遞的信號與第一電極或第二電極所傳遞的信號於時序上同步，可有效抑制觸控表面上具有浮置電位的導體與顯示畫素的驅動電極之間產生電容耦合，有助於提升觸控顯示裝置的觸控辨識率。Based on the above, in the touch display device of an embodiment of the present invention, the auxiliary electrode is provided in the area where the first electrode and the second electrode are not provided in the touch sensing area, and during the touch time, the auxiliary electrode The transmitted signal is synchronized with the signal transmitted by the first electrode or the second electrode in time sequence, which can effectively suppress the capacitive coupling between the conductor with floating potential on the touch surface and the driving electrode of the display pixel, which helps Improve the touch recognition rate of the touch display device.
本文使用的「約」、「近似」、「本質上」、或「實質上」包括所述值和在本領域普通技術人員確定的特定值的可接受的偏差範圍內的平均值，考慮到所討論的測量和與測量相關的誤差的特定數量（即，測量系統的限制）。例如，「約」可以表示在所述值的一個或多個標準偏差內，或例如±30%、±20%、±15%、±10%、±5%內。再者，本文使用的「約」、「近似」、「本質上」、或「實質上」可依量測性質、切割性質或其它性質，來選擇較可接受的偏差範圍或標準偏差，而可不用一個標準偏差適用全部性質。As used herein, "approximately", "approximately", "essentially", or "substantially" includes the stated value and the average value within the acceptable deviation range of the specific value determined by a person of ordinary skill in the art, taking into account all The measurement in question and the specific number of errors associated with the measurement (ie, the limitations of the measurement system). For example, "about" can mean within one or more standard deviations of the stated value, or, for example, within ±30%, ±20%, ±15%, ±10%, ±5%. Furthermore, "about", "approximately", "essentially", or "substantially" used in this article can be based on measurement properties, cutting properties, or other properties to select a more acceptable deviation range or standard deviation. Not one standard deviation applies to all properties.
在附圖中，為了清楚起見，放大了層、膜、面板、區域等的厚度。應當理解，當諸如層、膜、區域或基板的元件被稱為在另一元件「上」或「連接到」另一元件時，其可以直接在另一元件上或與另一元件連接，或者中間元件可以也存在。相反，當元件被稱為「直接在另一元件上」或「直接連接到」另一元件時，不存在中間元件。如本文所使用的，「連接」可以指物理及/或電性連接。再者，「電性連接」可為二元件間存在其它元件。In the drawings, the thickness of layers, films, panels, regions, etc., are exaggerated for clarity. It should be understood that when an element such as a layer, film, region, or substrate is referred to as being "on" or "connected to" another element, it can be directly on or connected to the other element, or Intermediate elements may also be present. In contrast, when an element is referred to as being "directly on" or "directly connected to" another element, there are no intervening elements. As used herein, "connection" can refer to physical and/or electrical connection. Furthermore, "electrical connection" can mean that there are other components between the two components.
現將詳細地參考本發明的示範性實施方式，示範性實施方式的實例說明於所附圖式中。只要有可能，相同元件符號在圖式和描述中用來表示相同或相似部分。Reference will now be made in detail to the exemplary embodiments of the present invention, and examples of the exemplary embodiments are illustrated in the accompanying drawings. Whenever possible, the same component symbols are used in the drawings and descriptions to indicate the same or similar parts.
圖1是本發明一實施例的觸控顯示裝置的俯視示意圖。圖2A及圖2B分別是圖1的觸控顯示裝置的局部區域I及局部區域II的放大示意圖。圖3是圖1的觸控顯示裝置的剖視示意圖。圖4是圖1的觸控顯示裝置的第一電極、第二電極與輔助電極於觸控時間內的輸入訊號的示意圖。特別說明的是，為清楚呈現起見，圖1省略了圖2A、圖2B與圖3的發光區LR以及圖3的保護層101、絕緣層120、披覆層130、黏著層150、顯示面板200的繪示。FIG. 1 is a schematic top view of a touch display device according to an embodiment of the invention. 2A and 2B are respectively enlarged schematic diagrams of the partial area I and the partial area II of the touch display device of FIG. 1. 3 is a schematic cross-sectional view of the touch display device of FIG. 1. 4 is a schematic diagram of input signals of the first electrode, the second electrode and the auxiliary electrode of the touch display device of FIG. 1 during the touch time. In particular, for clarity of presentation, FIG. 1 omits the light-emitting area LR of FIGS. 2A, 2B, and 3, and the
請參照圖1及圖3，觸控顯示裝置10包括觸控面板100、黏著層150以及顯示面板200。黏著層150位於觸控面板100與顯示面板200之間，且配置用以將觸控面板100貼合至顯示面板200上。也就是說，本實施例的觸控顯示裝置10是採用外貼式（out-cell）的觸控顯示技術。然而，本發明不限於此，根據其他實施例，觸控顯示裝置也可採用外嵌式（on-cell）或內嵌式（in-cell）的觸控顯示技術。另一方面，在本實施例中，觸控面板100是以全貼合（direct bonding）的方式與顯示面板200相接，但本發明不以此為限。在其他實施例中，觸控面板100也可以口字貼合（air bonding）的方式與顯示面板200相接。1 and 3, the
進一步而言，觸控面板100包括觸控基板110、多個第一電極TE1、多個第二電極TE2以及多個輔助電極AE。觸控基板110具有觸控感測區TSR，且這些第一電極TE1與這些第二電極TE2設置於觸控感測區TSR中。在本實施例中，這些第一電極TE1沿方向D2排列且在方向D1上延伸，而這些第二電極TE2沿方向D1排列且在方向D2上延伸。更具體的是，這些第一電極TE1相交於這些第二電極TE2並定義出多個開口OP，且多個輔助電極AE設置於這些開口OP內。Furthermore, the
另一方面，在本實施例中，第一電極TE1、第二電極TE2以及輔助電極AE是設置在顯示面板200與觸控基板110之間，但本發明不以此為限。在其他實施例中，觸控基板110也可設置於第一電極TE1、第二電極TE2以及輔助電極AE與顯示面板200之間。舉例而言，顯示面板200的厚度可小於200微米。也就是說，觸控顯示裝置10例如是可撓式的觸控顯示裝置。在一實施例中，顯示面板200的厚度可小於150微米，但不以此為限。On the other hand, in this embodiment, the first electrode TE1, the second electrode TE2, and the auxiliary electrode AE are disposed between the
在本實施例中，觸控面板100還可包括多個連接部AEc、多個連接電極CP與絕緣層120。連接部AEc與輔助電極AE在方向D1上交替排列，且電性連接在方向D1上排列且相鄰的兩個輔助電極AE。連接電極CP與輔助電極AE在方向D2上交替排列，且電性連接在方向D2上排列且相鄰的兩個輔助電極AE。具體而言，絕緣層120設置於第一電極TE1與第二電極TE2之間，且具有多個接觸窗120a與多個接觸窗120b。連接電極CP透過絕緣層120的接觸窗120a與接觸窗120b與對應的兩個輔助電極AE電性連接。為了簡化觸控顯示裝置10的製程工序，輔助電極AE、連接部AEc與第一電極TE1可選擇性地屬於同一膜層，而連接電極CP與第二電極TE2可選擇性地屬於同一膜層，但本發明不以此為限。在其他實施例中，輔助電極AE、連接部AEc與第二電極TE2也可屬於同一膜層，而連接電極CP與第一電極TE1也可屬於同一膜層。In this embodiment, the
特別說明的是，多個輔助電極AE是透過這些連接電極CP與這些連接部AEc而電性導通於彼此，而這些輔助電極AE僅透過一條連接走線CL即可與位在周邊區PR的一個接腳（pin；未繪示）電性連接。舉例來說，此接腳可接合至一軟性印刷電路板（未繪示）以電性連接至一訊號源（未繪示），軟性印刷電路板例如包括覆晶軟板（chip on film，COF）、或其他適合的傳輸電路板，但不以此為限。在本實施例中，觸控面板100還可包括披覆層130與保護層101。披覆層130覆蓋多個第二電極TE2與絕緣層120的部分表面。保護層101設置於觸控基板110遠離第一電極TE1的一側表面上，以達到保護的效果。Specifically, the auxiliary electrodes AE are electrically connected to each other through the connecting electrodes CP and the connecting portions AEc, and the auxiliary electrodes AE can be connected to one located in the peripheral area PR through only one connecting wire CL. The pin (not shown) is electrically connected. For example, this pin can be connected to a flexible printed circuit board (not shown) to electrically connect to a signal source (not shown). The flexible printed circuit board includes, for example, a chip on film (COF) ), or other suitable transmission circuit boards, but not limited to this. In this embodiment, the
在本實施例中，於第一電極TE1與第二電極TE2的相交處（例如圖1的局部區域I），第一電極TE1在觸控基板110的法線方向上可選擇性地完全重疊於第二電極TE2（如圖2A所示），但本發明不以此為限。在其他實施例中，於第一電極TE1與第二電極TE2的相交處，第一電極TE1在觸控基板110的法線方向上也可部分重疊於第二電極TE2。In this embodiment, at the intersection of the first electrode TE1 and the second electrode TE2 (for example, the local area I of FIG. 1), the first electrode TE1 can selectively completely overlap with the
在本實施例中，第一電極TE1、第二電極TE2與輔助電極AE的材質可包括合金、金屬材料的氮化物、金屬材料的氧化物、金屬材料的氮氧化物、或其他合適的材料、或是金屬材料與其他導電材料的堆疊層。然而，本發明不限於此，在其他實施例中，第一電極TE1、第二電極TE2與輔助電極AE也可以是光穿透式電極，而光穿透式電極的材質可包括金屬氧化物，例如：銦錫氧化物、銦鋅氧化物、鋁錫氧化物、鋁鋅氧化物、或其它合適的氧化物、或者是上述至少兩者之堆疊層。In this embodiment, the materials of the first electrode TE1, the second electrode TE2, and the auxiliary electrode AE may include alloys, nitrides of metallic materials, oxides of metallic materials, oxynitrides of metallic materials, or other suitable materials, Or a stacked layer of metal materials and other conductive materials. However, the present invention is not limited to this. In other embodiments, the first electrode TE1, the second electrode TE2, and the auxiliary electrode AE may also be light-transmitting electrodes, and the material of the light-transmitting electrodes may include metal oxides. For example: indium tin oxide, indium zinc oxide, aluminum tin oxide, aluminum zinc oxide, or other suitable oxides, or a stacked layer of at least two of the foregoing.
另一方面，顯示面板200包括驅動電路基板210與畫素結構層220。畫素結構層220設置於驅動電路基板210上，且重疊於觸控感測區TSR。在本實施例中，畫素結構層220包括畫素定義層PD、顯示介質層DM、畫素電極PE以及共通電極CE。顯示介質層DM例如是有機發光材料（organic light emitting material）層，且設置於畫素定義層PD的多個凹槽PDa內。亦即，畫素定義層PD的這些凹槽PDa可定義出畫素結構層220的多個發光區LR（或畫素區）。畫素電極PE與共通電極CE分別位於顯示介質層DM的相對兩側。更具體地說，本實施例的顯示面板200為有機發光二極體（organic light emitting diode panel，OLED Panel）面板。然而，本發明不限於此，根據其他實施例，顯示面板也可以是液晶顯示面板（liquid crystal display panel，LCD Panel）。On the other hand, the
在本實施例中，顯示面板200還可包括覆蓋畫素結構層220的封裝層230。舉例來說，為了增加觸控顯示裝置10的可撓性，封裝層230例如是以薄膜封裝（Thin Film Encapsulation，TFE）的方式來實施，但本發明不以此為限。特別一提的是，在其他未示出的實施例中，觸控面板還可包括偏光片（polarizer）。偏光片設置於保護層101與觸控基板110之間，且例如是圓偏光片，以改善包含有機發光二極體面板的觸控顯示裝置的顯示對比。在未示出的另一實施例中，觸控面板還可包括彩色濾光層（color filter layer），且彩色濾光層設置於觸控基板110與第二電極TE2之間。據此，可提升包含有機發光二極體面板的觸控顯示裝置的色彩表現。In this embodiment, the
請同時參照圖2A及圖2B，在本實施例中，第一電極TE1、第二電極TE2與輔助電極AE在觸控基板110的法線方向上不重疊於畫素結構層220的發光區LR。具體而言，第一電極TE1、第二電極TE2與輔助電極AE分別可具有多個第一延伸部與第二延伸部，且這些第一延伸部沿方向D1排列且在方向D2上延伸，這些第二延伸部沿方向D2排列且在方向D1上延伸。在本實施例中，方向D1實質上可垂直於方向D2，但不以此為限。2A and 2B at the same time, in this embodiment, the first electrode TE1, the second electrode TE2 and the auxiliary electrode AE do not overlap the light-emitting area LR of the
舉例而言，第一電極TE1的第一延伸部TE1a（或者是第二電極TE2的第一延伸部TE2a）與發光區LR是沿方向D1交替排列，而第一電極TE1的第二延伸部TE1b（或者是第二電極TE2的第二延伸部TE2b）與發光區LR是沿方向D2交替排列。相似地，輔助電極AE的第一延伸部AEa與發光區LR是沿方向D1交替排列，而輔助電極AE的第二延伸部AEb與發光區LR是沿方向D2交替排列。For example, the first extension TE1a of the first electrode TE1 (or the first extension TE2a of the second electrode TE2) and the light emitting area LR are alternately arranged along the direction D1, and the second extension TE1b of the first electrode TE1 (Or the second extension portion TE2b of the second electrode TE2) and the light emitting area LR are alternately arranged along the direction D2. Similarly, the first extension AEa of the auxiliary electrode AE and the light emitting area LR are alternately arranged along the direction D1, and the second extension AEb of the auxiliary electrode AE and the light emitting area LR are alternately arranged along the direction D2.
需說明的是，在本實施例中，第一電極TE1的任兩相鄰的第一延伸部TE1a（或者是第二電極TE2的任兩相鄰的第一延伸部TE2a）之間的發光區LR數量以及輔助電極AE的任兩相鄰的第一延伸部AEa之間的發光區LR數量分別是以兩個以及一個為例進行示範性地說明，並不表示本發明以圖式揭示內容為限制。在其他實施例中，第一電極TE1的任兩相鄰的第一延伸部TE1a（或者是第二電極TE2的任兩相鄰的第一延伸部TE2a）之間的發光區LR數量也可以是一個或三個以上，而輔助電極AE的任兩相鄰的第一延伸部AEa之間的發光區LR數量也可以是兩個以上。同樣地，本發明並不以圖式揭示內容而加以限制第一電極TE1、第二電極TE2或輔助電極AE的任兩相鄰的第二延伸部之間的發光區LR數量。It should be noted that, in this embodiment, the light-emitting area between any two adjacent first extension portions TE1a of the first electrode TE1 (or any two adjacent first extension portions TE2a of the second electrode TE2) The number of LR and the number of light-emitting areas LR between any two adjacent first extensions AEa of the auxiliary electrode AE are illustrated by taking two and one as examples respectively, and it does not mean that the present invention uses the schematic disclosure content as limit. In other embodiments, the number of light-emitting areas LR between any two adjacent first extension portions TE1a of the first electrode TE1 (or any two adjacent first extension portions TE2a of the second electrode TE2) may also be One or more than three, and the number of light-emitting regions LR between any two adjacent first extension portions AEa of the auxiliary electrode AE can also be more than two. Similarly, the present invention does not limit the number of light-emitting areas LR between any two adjacent second extensions of the first electrode TE1, the second electrode TE2, or the auxiliary electrode AE without the content of the figures.
以下將針對觸控顯示裝置10的驅動方式進行示例性地說明。請參照圖1及圖4，觸控顯示裝置10於時序上分別具有用於顯示畫面的顯示時間（未繪示）以及用於觸控感測的觸控時間Tt，且顯示時間與觸控時間Tt可於時序上交替設置。需說明的是，為清楚呈現與說明起見，圖4省略了觸控顯示裝置10的顯示時間的繪示。The driving method of the
在本實施例中，於觸控時間Tt內，第一電極TE1被輸入第一信號S1，第二電極TE2被輸入第二信號S2。觸控時間Tt具有第一時段Tp1與第二時段Tp2。舉例而言，於觸控時間Tt的第一時段Tp1內，第一電極TE1所傳遞的第一信號S1可以是驅動信號DS1，第二電極TE2所傳遞的第二信號S2可以是感測信號SS。也就是說，此時的第一電極TE1可以是驅動電極，第二電極TE2可以是感測電極，而觸控面板100是操作在互容（mutual-capacitance）感測的模式下。值得一提的是，於觸控時間Tt的第一時段Tp1內，輔助電極AE可具有浮置電位（floating potential），以避免影響第一電極TE1與第二電極TE2操作在互容感測模式下的電性。In this embodiment, during the touch time Tt, the first electrode TE1 is input with the first signal S1, and the second electrode TE2 is input with the second signal S2. The touch time Tt has a first period Tp1 and a second period Tp2. For example, in the first period Tp1 of the touch time Tt, the first signal S1 transmitted by the first electrode TE1 may be the driving signal DS1, and the second signal S2 transmitted by the second electrode TE2 may be the sensing signal SS . That is, at this time, the first electrode TE1 may be a driving electrode, the second electrode TE2 may be a sensing electrode, and the
進一步而言，於觸控時間Tt的第二時段Tp2內，第一電極TE1所傳遞的第一信號S1可以是驅動信號DS2，第二電極TE2所傳遞的第二信號S2可以是接地電位或固定電位。更具體地說，此時的觸控面板100是透過第一電極TE1的驅動與感測而操作在自容（self-capacitance）感測的模式下。值得注意的是，於觸控時間Tt的第二時段Tp2內，輔助電極AE被輸入第三信號S3，且此第三信號S3與第一信號S1（即驅動信號DS2）於時序上同步。據此，可有效降低觸控表面上具有浮置電位且非預期的導體（例如水滴）透過與顯示面板200的導電層（例如共通電極CE）之間的電容耦合效應（capacitive coupling effect）所產生的自容變化量，有助於提升觸控顯示裝置10的觸控辨識率。Further, in the second period Tp2 of the touch time Tt, the first signal S1 transmitted by the first electrode TE1 may be the driving signal DS2, and the second signal S2 transmitted by the second electrode TE2 may be ground potential or fixed Potential. More specifically, the
相似地，於觸控時間Tt的第三時段Tp3內，第一電極TE1所傳遞的第一信號S1可以是接地電位或固定電位，第二電極TE2所傳遞的第二信號S2可以是驅動信號DS3。更具體地說，此時的觸控面板100是透過第二電極TE2的驅動與感測而操作在自容感測的模式下。值得注意的是，於觸控時間Tt的第三時段Tp3內，輔助電極AE被輸入第四信號S4，且此第四信號S4與第二信號S2（即驅動信號DS3）於時序上同步。據此，可有效降低觸控表面上具有浮置電位且非預期的導體（例如水滴）透過與顯示面板200的導電層（例如共通電極CE）之間的電容耦合效應（capacitive coupling effect）所產生的自容變化量，有助於提升觸控顯示裝置10的觸控辨識率。Similarly, in the third period Tp3 of the touch time Tt, the first signal S1 transmitted by the first electrode TE1 may be a ground potential or a fixed potential, and the second signal S2 transmitted by the second electrode TE2 may be the driving signal DS3 . More specifically, the
特別一提的是，藉由上述第二時段Tp2與第三時段Tp3的自容感測，可辨識出具有浮置電位且非預期的導體（例如水滴）於觸控表面上的位置，並透過這些位置資訊將經由互容感測所取得的觸控訊息進行修正，以提高對於實施觸控的導體（例如手指）的辨識率。換句話說，可提升觸控顯示裝置10的觸控辨識率。值得一提的是，於觸控時間Tt內，透過第一電極TE1與第二電極TE2的自容感測，還可對於實施觸控的導體（例如手指）進行觸控位置的預掃描。據此，可減少互容感測時所需掃描的電極數，有助於縮減互容感測的操作時間。In particular, through the self-capacitive sensing in the second time period Tp2 and the third time period Tp3, the position of an unexpected conductor (such as a water droplet) with a floating potential on the touch surface can be identified, and through The position information will be corrected by the touch information obtained by mutual capacitance sensing, so as to improve the recognition rate of the conductor (for example, finger) that implements the touch. In other words, the touch recognition rate of the
需說明的是，本實施例的觸控時間Tt雖以第一時段Tp1、第二時段Tp2以及第三時段Tp3的先後順序呈現，但不表示本發明以此為限制。本發明所屬技術領域中具有通常知識者應可理解的是，這些時段的排列順序可根據實際的設計需求而調整，例如：為了實現預掃描的功能，第二時段Tp2與第三時段Tp3的自容感測可早於第一時段Tp1的互容感測。It should be noted that although the touch time Tt in this embodiment is presented in the order of the first time period Tp1, the second time period Tp2, and the third time period Tp3, it does not mean that the present invention is limited thereto. Those with ordinary knowledge in the technical field of the present invention should understand that the sequence of these periods can be adjusted according to actual design requirements. For example, in order to achieve the pre-scan function, the second period Tp2 and the third period Tp3 are automatically set. The capacitance sensing may be earlier than the mutual capacitance sensing in the first period Tp1.
以下將列舉另一實施例以詳細說明本揭露，其中相同的構件將標示相同的符號，並且省略相同技術內容的說明，省略部分請參考前述實施例，以下不再贅述。Hereinafter, another embodiment will be listed to describe the disclosure in detail, wherein the same components will be marked with the same symbols, and the description of the same technical content will be omitted. For the omitted parts, please refer to the foregoing embodiments, and will not be repeated hereafter.
圖5是本發明另一實施例的觸控顯示裝置的俯視示意圖。圖6是圖5的觸控顯示裝置的第一電極、第二電極與第一輔助電極於觸控時間內的輸入訊號的示意圖。圖7是圖5的觸控顯示裝置的第一電極、第二電極與第二輔助電極於觸控時間內的輸入訊號的示意圖。5 is a schematic top view of a touch display device according to another embodiment of the invention. 6 is a schematic diagram of input signals of the first electrode, the second electrode and the first auxiliary electrode of the touch display device of FIG. 5 during the touch time. FIG. 7 is a schematic diagram of input signals of the first electrode, the second electrode and the second auxiliary electrode of the touch display device of FIG. 5 during the touch time.
請參照圖5，本實施例的觸控顯示裝置20與圖1的觸控顯示裝置10的主要差異在於：觸控感測區與輔助電極的配置方式不同。具體而言，觸控顯示裝置20的觸控感測區TSR具有第一區TSR1與第二區TSR2，多個輔助電極包括位於第一區TSR1的多個第一輔助電極AE1以及位於第二區TSR2的多個第二輔助電極AE2，且這些第一輔助電極AE1電性獨立於這些第二輔助電極AE2。Referring to FIG. 5, the main difference between the
在本實施例中，多個第一輔助電極AE1是透過多個連接電極CP1與多個連接部AEc1而電性導通於彼此，且透過連接走線CL1與位在周邊區PR的一個接腳（未繪示）電性連接。多個第二輔助電極AE2是透過多個連接電極CP2與多個連接部AEc2而電性導通於彼此，且透過另一連接走線CL2與位在周邊區PR的另一個接腳（未繪示）電性連接。換句話說，第一輔助電極AE1與第二輔助電極AE2各自可獨立地被控制。In this embodiment, the plurality of first auxiliary electrodes AE1 are electrically connected to each other through the plurality of connecting electrodes CP1 and the plurality of connecting portions AEc1, and through the connecting wiring CL1 and a pin located in the peripheral area PR ( Not shown) Electrical connection. The plurality of second auxiliary electrodes AE2 are electrically connected to each other through the plurality of connecting electrodes CP2 and the plurality of connecting portions AEc2, and are connected to another pin (not shown) located in the peripheral area PR through another connecting wire CL2 ) Electrical connection. In other words, each of the first auxiliary electrode AE1 and the second auxiliary electrode AE2 can be independently controlled.
以下將針對觸控顯示裝置20的驅動方式進行示例性地說明。請同時參照圖6及圖7，觸控顯示裝置20於時序上分別具有用於顯示畫面的顯示時間（未繪示）以及用於觸控感測的觸控時間Tt，且顯示時間與觸控時間Tt可於時序上交替設置。需說明的是，為清楚呈現與說明起見，圖6及圖7省略了觸控顯示裝置20的顯示時間的繪示。The driving method of the
在本實施例中，於觸控時間Tt內，第一電極TE1被輸入第一信號S1，第二電極TE2被輸入第二信號S2。觸控時間Tt具有第一時段Tp1與第二時段Tp2。舉例而言，於觸控時間Tt的第一時段Tp1內，第一電極TE1所傳遞的第一信號S1可以是驅動信號DS1，第二電極TE2所傳遞的第二信號S2可以是感測信號SS。也就是說，此時的第一電極TE1可以是驅動電極，第二電極TE2可以是感測電極，而觸控面板100是操作在互容（mutual-capacitance）感測的模式下。值得一提的是，於觸控時間Tt的第一時段Tp1內，輔助電極AE可具有浮置電位（floating potential），以避免影響第一電極TE1與第二電極TE2操作在互容感測模式下的電性。In this embodiment, during the touch time Tt, the first electrode TE1 is input with the first signal S1, and the second electrode TE2 is input with the second signal S2. The touch time Tt has a first period Tp1 and a second period Tp2. For example, in the first period Tp1 of the touch time Tt, the first signal S1 transmitted by the first electrode TE1 may be the driving signal DS1, and the second signal S2 transmitted by the second electrode TE2 may be the sensing signal SS . That is, at this time, the first electrode TE1 may be a driving electrode, the second electrode TE2 may be a sensing electrode, and the
進一步而言，於觸控時間Tt的第二時段Tp2內，第一電極TE1所傳遞的第一信號S1可以是驅動信號DS2，第二電極TE2所傳遞的第二信號S2可以是接地電位或固定電位。更具體地說，此時的觸控面板100是透過第一電極TE1的驅動與感測而操作在自容（self-capacitance）感測的模式下。Further, in the second period Tp2 of the touch time Tt, the first signal S1 transmitted by the first electrode TE1 may be the driving signal DS2, and the second signal S2 transmitted by the second electrode TE2 may be ground potential or fixed Potential. More specifically, the
值得注意的是，於觸控時間Tt的第二時段Tp2內，第一輔助電極AE1被輸入第三信號S3，且此第三信號S3與第一信號S1（即驅動信號DS2）於時序上同步。據此，可有效降低觸控表面上具有浮置電位且非預期的導體（例如水滴）透過與顯示面板的導電層（例如共通電極）之間的電容耦合效應（capacitive coupling effect）所產生的自容變化量，有助於提升觸控顯示裝置20的觸控辨識率。另一方面，於觸控時間Tt的第二時段Tp2內，第二輔助電極AE2所傳輸的第三信號S3A可以是接地電位或固定電位。舉例而言，第二輔助電極AE2所具有的固定電位可不同於第二電極TE2所具有的固定電位，但不以此為限。在其他實施例中，第二輔助電極AE2所具有的固定電位也可等於第二電極TE2所具有的固定電位。It is worth noting that during the second period Tp2 of the touch time Tt, the first auxiliary electrode AE1 is inputted with the third signal S3, and the third signal S3 is synchronized with the first signal S1 (ie, the driving signal DS2) in time sequence . According to this, it is possible to effectively reduce the capacitive coupling effect (capacitive coupling effect) generated by unexpected conductors (such as water droplets) with floating potential on the touch surface and the conductive layer (such as common electrodes) of the display panel. The amount of change in capacitance helps to improve the touch recognition rate of the
相似地，於觸控時間Tt的第三時段Tp3內，第一電極TE1所傳遞的第一信號S1可以是接地電位或固定電位，第二電極TE2所傳遞的第二信號S2可以是驅動信號DS3。更具體地說，此時的觸控顯示裝置20是透過第二電極TE2的驅動與感測而操作在自容感測的模式下。Similarly, in the third period Tp3 of the touch time Tt, the first signal S1 transmitted by the first electrode TE1 may be a ground potential or a fixed potential, and the second signal S2 transmitted by the second electrode TE2 may be the driving signal DS3 . More specifically, the
值得注意的是，於觸控時間Tt的第三時段Tp3內，第一輔助電極AE1被輸入第四信號S4A，且此第四信號S4A可具有接地電位或固定電位。舉例而言，第一輔助電極AE1所具有的固定電位可不同於第一電極TE1所具有的固定電位，但不以此為限。在其他實施例中，第一輔助電極AE1所具有的固定電位也可等於第一電極TE1所具有的固定電位。另一方面，於觸控時間Tt的第三時段Tp3內，第二輔助電極AE2所傳輸的第四信號S4與第二電極TE2所傳遞的第二信號S2（即驅動信號DS3）於時序上同步。據此，可有效降低觸控表面上具有浮置電位且非預期的導體（例如水滴）透過與顯示面板的導電層（例如共通電極）之間的電容耦合效應（capacitive coupling effect）所產生的自容變化量，有助於提升觸控顯示裝置20的觸控辨識率。It is worth noting that during the third period Tp3 of the touch time Tt, the first auxiliary electrode AE1 is inputted with the fourth signal S4A, and the fourth signal S4A may have a ground potential or a fixed potential. For example, the fixed potential of the first auxiliary electrode AE1 may be different from the fixed potential of the first electrode TE1, but is not limited to this. In other embodiments, the fixed potential of the first auxiliary electrode AE1 may also be equal to the fixed potential of the first electrode TE1. On the other hand, in the third period Tp3 of the touch time Tt, the fourth signal S4 transmitted by the second auxiliary electrode AE2 and the second signal S2 (ie, the driving signal DS3) transmitted by the second electrode TE2 are synchronized in timing. . According to this, it is possible to effectively reduce the capacitive coupling effect (capacitive coupling effect) generated by unexpected conductors (such as water droplets) with floating potential on the touch surface and the conductive layer (such as common electrodes) of the display panel. The amount of change in capacitance helps to improve the touch recognition rate of the
特別一提的是，透過輔助電極的分區配置可降低輔助電極的整體阻值。同時，還可縮減輔助電極於時序上與兩電極的同步次數，例如：第一輔助電極AE1僅需要於第二時段Tp2內與第一電極TE1的傳輸信號同步，而無須在第三時段Tp3內與第二電極TE2的傳輸信號同步；相似地，第二輔助電極AE2僅需要於第三時段Tp3內與第二電極TE2的傳輸信號同步，而無須在第二時段Tp2內與第一電極TE1的傳輸信號同步。換句話說，還可降低輔助電極整體的操作功耗。In particular, the partition arrangement of the auxiliary electrode can reduce the overall resistance of the auxiliary electrode. At the same time, the number of times the auxiliary electrode is synchronized with the two electrodes in timing can be reduced. For example, the first auxiliary electrode AE1 only needs to be synchronized with the transmission signal of the first electrode TE1 in the second time period Tp2, and does not need to be in the third time period Tp3. Synchronize with the transmission signal of the second electrode TE2; similarly, the second auxiliary electrode AE2 only needs to be synchronized with the transmission signal of the second electrode TE2 in the third period Tp3, and does not need to be synchronized with the transmission signal of the first electrode TE1 in the second period Tp2. The transmission signal is synchronized. In other words, the overall operating power consumption of the auxiliary electrode can also be reduced.
需說明的是，在本實施例中，觸控感測區域的分區數量是以兩個為例進行示範性地說明，並不代表本發明以圖式揭示內容為限制。在其他實施例中，觸控感測區域的分區數量（或者是輔助電極的分群數量）也可根據實際的設計需求（例如輔助電極的阻值或操作功耗）而調整為三個。It should be noted that, in this embodiment, the number of partitions of the touch sensing area is exemplified by taking two as an example, which does not mean that the present invention is limited by the content of the drawings. In other embodiments, the number of partitions of the touch sensing area (or the number of groups of auxiliary electrodes) can also be adjusted to three according to actual design requirements (for example, the resistance of the auxiliary electrode or operating power consumption).
綜上所述，在本發明一實施例的觸控顯示裝置中，透過在觸控感測區未設有第一電極與第二電極的區域內設置輔助電極，且於觸控時間內，此輔助電極所傳遞的信號與第一電極或第二電極所傳遞的信號於時序上同步，可有效抑制觸控表面上具有浮置電位的導體與顯示畫素的驅動電極之間產生電容耦合，有助於提升觸控顯示裝置的觸控辨識率。In summary, in the touch display device of an embodiment of the present invention, the auxiliary electrode is provided in the area where the first electrode and the second electrode are not provided in the touch sensing area, and during the touch time, this The signal transmitted by the auxiliary electrode is synchronized with the signal transmitted by the first electrode or the second electrode in time sequence, which can effectively suppress the capacitive coupling between the conductor with a floating potential on the touch surface and the driving electrode of the display pixel. Helps improve the touch recognition rate of the touch display device.
10、20:觸控顯示裝置
100:觸控面板
101:保護層
110:觸控基板
120:絕緣層
120a、120b:接觸窗
130:披覆層
150:黏著層
200:顯示面板
210:驅動電路基板
220:畫素結構層
230:封裝層
AE、AE1、AE2:輔助電極
AEa、TE1a、TE2a:第一延伸部
AEb、TE1b、TE2b:第二延伸部
AEc、AEc1、AEc2:連接部
CE:共通電極
CL、CL1、CL2:連接走線
CP、CP1、CP2:連接電極
DM:顯示介質層
DS1、DS2、DS3:驅動信號
D1、D2:方向
LR:發光區
OP:開口
PD:畫素定義層
PDa:凹槽
PE:畫素電極
PR:周邊區
SS:感測信號
S1:第一信號
S2:第二信號
S3、S3A:第三信號
S4、S4A:第四信號
TE1:第一電極
TE2:第二電極
Tp1:第一時段
Tp2:第二時段
Tp3:第三時段
TSR:觸控感測區
TSR1:第一區
TSR2:第二區
Tt:觸控時間
I、II:區域
10.20: Touch display device
100: Touch panel
101: protective layer
110: touch substrate
120: insulating
圖1是本發明一實施例的觸控顯示裝置的俯視示意圖。 圖2A及圖2B是圖1的觸控顯示裝置的兩局部區域的放大示意圖。 圖3是圖1的觸控顯示裝置的剖視示意圖。 圖4是圖1的觸控顯示裝置的第一電極、第二電極與輔助電極於觸控時間內的輸入訊號的示意圖。 圖5是本發明另一實施例的觸控顯示裝置的俯視示意圖。 圖6是圖5的觸控顯示裝置的第一電極、第二電極與第一輔助電極於觸控時間內的輸入訊號的示意圖。 圖7是圖5的觸控顯示裝置的第一電極、第二電極與第二輔助電極於觸控時間內的輸入訊號的示意圖。 FIG. 1 is a schematic top view of a touch display device according to an embodiment of the invention. 2A and 2B are enlarged schematic diagrams of two partial regions of the touch display device in FIG. 1. 3 is a schematic cross-sectional view of the touch display device of FIG. 1. 4 is a schematic diagram of input signals of the first electrode, the second electrode and the auxiliary electrode of the touch display device of FIG. 1 during the touch time. 5 is a schematic top view of a touch display device according to another embodiment of the invention. 6 is a schematic diagram of input signals of the first electrode, the second electrode and the first auxiliary electrode of the touch display device of FIG. 5 during the touch time. FIG. 7 is a schematic diagram of input signals of the first electrode, the second electrode and the second auxiliary electrode of the touch display device of FIG. 5 during the touch time.
10:觸控顯示裝置 10: Touch display device
110:觸控基板 110: touch substrate
120a、120b:接觸窗 120a, 120b: contact window
AE:輔助電極 AE: auxiliary electrode
AEc:連接部 AEc: Connection part
CL:連接走線 CL: Connection routing
CP:連接電極 CP: Connect electrode
D1、D2:方向 D1, D2: direction
OP:開口 OP: opening
PR:周邊區 PR: Peripheral area
TE1:第一電極 TE1: first electrode
TE2:第二電極 TE2: second electrode
TSR:觸控感測區 TSR: Touch sensing area
I、II:區域 I, II: area
Claims (9)
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