TWI806180B - Touch display device and positioning method of display panel - Google Patents
Touch display device and positioning method of display panel Download PDFInfo
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Description
本發明是有關於一種觸控顯示裝置,且特別是有關於一種可以利用壓力感測器(force sensor)進行觸控定位的觸控顯示裝置及顯示面板的定位方法。The present invention relates to a touch display device, and in particular to a touch display device and a display panel positioning method capable of using a force sensor for touch positioning.
現今的觸控顯示面板一般是採用電容式觸控感測技術來感測顯示面板的觸碰事件的位置。對於被設計用於簡單應用的顯示面板而言,電容式觸控感測技術是一個昂貴的解決方案。找出更適合簡單應用的顯示面板定位技術,是觸控感測技術領域的技術課題之一。Today's touch display panels generally use capacitive touch sensing technology to sense the position of a touch event on the display panel. Capacitive touch sensing technology is an expensive solution for display panels designed for simple applications. Finding out a display panel positioning technology more suitable for simple applications is one of the technical issues in the field of touch sensing technology.
有鑑於此,本發明提出一種觸控顯示裝置及顯示面板的定位方法,以定位發生於顯示面板上的按壓事件的按壓位置。In view of this, the present invention proposes a positioning method for a touch display device and a display panel to locate the pressing position of a pressing event on the display panel.
在本發明的一實施例中,所述觸控顯示裝置包括顯示面板、多個壓力感測器以及處理電路。顯示面板顯示畫面。多個壓力感測器配置於顯示面板下方。多個壓力感測器感測於顯示面板上的按壓事件以提供多個壓力感測結果。處理電路耦接至多個壓力感測器。處理電路依據多個壓力感測結果中的至少兩個計算按壓事件的按壓位置。In an embodiment of the present invention, the touch display device includes a display panel, a plurality of pressure sensors and a processing circuit. Display panel display screen. Multiple pressure sensors are arranged under the display panel. A plurality of pressure sensors sense pressing events on the display panel to provide a plurality of pressure sensing results. The processing circuit is coupled to the plurality of pressure sensors. The processing circuit calculates the pressing position of the pressing event according to at least two of the pressure sensing results.
在本發明的一實施例中,所述顯示面板的定位方法包括:配置多個壓力感測器於顯示面板下方;透過多個壓力感測器感測於顯示面板上的按壓事件;以及透過處理電路依據多個壓力感測器的多個壓力感測結果中的至少兩個計算按壓事件的按壓位置。In an embodiment of the present invention, the positioning method of the display panel includes: disposing a plurality of pressure sensors under the display panel; sensing a press event on the display panel through the plurality of pressure sensors; and processing The circuit calculates the pressing position of the pressing event according to at least two of the pressure sensing results of the pressure sensors.
基於上述,本發明諸實施例所述的觸控顯示裝置可以透過這些壓力感測器感測顯示面板上的按壓事件。處理電路可以依據在顯示面板下方的至少兩個壓力感測器的壓力感測結果來計算/定位發生於顯示面板上的按壓事件的按壓位置。如此一來,所述觸控顯示裝置具有成本低、複雜度低、容易實現等功效,更適合簡單應用。Based on the above, the touch display device according to the embodiments of the present invention can sense the pressing event on the display panel through the pressure sensors. The processing circuit can calculate/locate the pressing position of the pressing event occurring on the display panel according to the pressure sensing results of the at least two pressure sensors below the display panel. In this way, the touch display device has the effects of low cost, low complexity, and easy implementation, and is more suitable for simple applications.
為讓本發明的上述特徵和優點能更明顯易懂,下文特舉實施例,並配合所附圖式作詳細說明如下。In order to make the above-mentioned features and advantages of the present invention more comprehensible, the following specific embodiments are described in detail together with the accompanying drawings.
在本案說明書全文(包括申請專利範圍)中所使用的「耦接(或連接)」一詞可指任何直接或間接的連接手段。舉例而言,若文中描述第一裝置耦接(或連接)於第二裝置,則應該被解釋成該第一裝置可以直接連接於該第二裝置,或者該第一裝置可以透過其他裝置或某種連接手段而間接地連接至該第二裝置。本案說明書全文(包括申請專利範圍)中提及的「第一」、「第二」等用語是用以命名元件(element)的名稱,或區別不同實施例或範圍,而並非用來限制元件數量的上限或下限,亦非用來限制元件的次序。另外,凡可能之處,在圖式及實施方式中使用相同標號的元件/構件/步驟代表相同或類似部分。不同實施例中使用相同標號或使用相同用語的元件/構件/步驟可以相互參照相關說明。The term "coupled (or connected)" used throughout the specification of this case (including the scope of claims) may refer to any direct or indirect means of connection. For example, if it is described in the text that a first device is coupled (or connected) to a second device, it should be interpreted that the first device can be directly connected to the second device, or the first device can be connected to the second device through other devices or certain A connection means indirectly connected to the second device. The terms "first" and "second" mentioned in the entire description of this case (including the scope of the patent application) are used to name elements (elements), or to distinguish different embodiments or ranges, and are not used to limit the number of elements The upper or lower limit of , nor is it used to limit the order of the elements. In addition, wherever possible, elements/components/steps using the same reference numerals in the drawings and embodiments represent the same or similar parts. Elements/components/steps using the same symbols or using the same terms in different embodiments can refer to related descriptions.
圖1是依照本發明一實施例的觸控顯示裝置100的電路方塊(circuit block)示意圖。於圖1所示實施例中,觸控顯示裝置100包括顯示面板110、壓力感測器120_1、120_2、…、120_n以及處理電路130。顯示面板110用以顯示畫面IMG。依照實際應用,顯示面板110的種類可以是液晶顯示器(Liquid Crystal Display,LCD)、電子紙顯示器(Electronic Paper Display,EPD)、高分子分散液晶(Polymer-dispersed Liquid Crystal)、膽固醇液晶(Cholesteric Liquid Crystal)、發光二極體(Light Emitting Diode,LED)顯示器、場發射顯示器(Field Emission Display,FED)、有機發光二極體(Organic Light Emitting Diode,OLED)、主動式矩陣有機發光二極體(Active-Matrix Organic Light-Emitting Diode,AMOLED)顯示器、軟性顯示器(Flexible Display)、透明發光二極體顯示器(Transparent Light Emitted Diode Display)或其他提供顯示功能的顯示單元。依照實際需求,顯示面板110可以應用於電子裝置的主螢幕、輔助螢幕(例如觸控欄(touch bar))或是其他可以進行觸控輸入的顯示應用上。在針對一些簡單應用的設計範例中,顯示面板110可以是不具備觸碰感測功能的任何顯示面板。FIG. 1 is a schematic diagram of a circuit block of a
壓力感測器120_1~120_n可以是任何將壓力轉換為電訊號的感測器,例如使用壓電材料來製作的壓力感測器。壓力感測器120_1~120_n被配置於顯示面板110的下方。使用者可以觸碰顯示面板110的上表面(亦即對顯示面板110施加按壓事件PE),而壓力感測器120_1~120_n可以感測於顯示面板110上表面的按壓事件PE以提供多個壓力感測結果F1、F2、…、Fn給處理電路130。在一些實施例中,壓力感測器120_1~120_n的任一者或全部可以為垂直壓力感測器(vertical force sensor),壓力感測結果F1~Fn的任一者或全部可以為垂直壓力值,以感測垂直於顯示面板110方向上的壓力。壓力感測器120_1~120_n的數量n可以依照實際需求來設置,本實施例並不設限。處理電路130耦接至壓力感測器120_1~120_n,以接收壓力感測器120_1~120_n提供的壓力感測結果F1~Fn。The pressure sensors 120_1˜120_n can be any sensors that convert pressure into electrical signals, such as pressure sensors made of piezoelectric materials. The pressure sensors 120_1 ˜ 120 — n are disposed under the
依照設計需求,處理電路130的相關功能可以利用硬體描述語言(hardware description languages,例如Verilog HDL或VHDL)或其他合適的編程語言來實現為硬體。舉例來說,處理電路130的相關功能可以被實現於一或多個微控制器、微處理器、特殊應用積體電路(Application-specific integrated circuit, ASIC)、數位信號處理器(digital signal processor, DSP)、場可程式邏輯閘陣列(Field Programmable Gate Array, FPGA)及/或其他處理單元中的各種邏輯區塊、模組和電路。以軟體形式及/或韌體形式而言,處理電路130的相關功能可以被實現為編程碼(programming codes)。例如,利用一般的編程語言(programming languages,例如C、C++或組合語言)或其他合適的編程語言來實現。所述編程碼可以被記錄/存放在「非臨時的電腦可讀取媒體(non-transitory computer readable medium)」中,例如包括唯讀記憶體(Read Only Memory,ROM)、帶(tape)、碟(disk)、卡(card)、半導體記憶體、可程式設計的邏輯電路及/或存儲裝置。中央處理器(Central Processing Unit,CPU)、微控制器或微處理器可以從所述非臨時的電腦可讀取媒體中讀取並執行所述編程碼,從而達成相關功能。According to design requirements, related functions of the
圖2是依照本發明一實施例的觸控顯示裝置的定位方法的流程示意圖。請同時參照圖1與圖2。於步驟S210中,壓力感測器120_1~120_n可以被配置於顯示面板110的下方。舉例而言,圖3A與圖3B是依照本發明一實施例說明觸控顯示裝置100的不同使用情境的上視透視示意圖。於圖3A與圖3B所示實施例中,以長條形狀的顯示面板110為範例,顯示面板110可以顯示如圖3A所示的彩條(color bar)畫面IMG_1、圖3B所示的按鈕圖標(icon)畫面IMG_2或是其他影像畫面。圖1所示壓力感測器120_1~120_n的排列與分布方式可以參照圖3A與圖3B所示壓力感測器120_1~120_n的相關說明加以類推。然而,圖1所示壓力感測器120_1~120_n的具體排列與分布方式不應受限於圖3A與圖3B所示實施例。壓力感測器120_1~120_n可以依照實際設計來設置,本實施例並不設限。FIG. 2 is a schematic flowchart of a positioning method for a touch display device according to an embodiment of the invention. Please refer to Figure 1 and Figure 2 at the same time. In step S210 , the pressure sensors 120_1 ˜ 120 — n may be disposed under the
於圖2所示步驟S220中,圖1所示壓力感測器120_1~120_n可以感測於顯示面板110上的按壓事件。在一些實施例中,壓力感測器120_1~120_n中的每一個的第一端可以耦接至多個掃描線中的對應掃描線,壓力感測器120_1~120_n中的每一個的第二端可以耦接至處理電路130。處理電路130可以基於多個掃描線的掃描時序讀取壓力感測器120_1~120_n的壓力感測結果F1~Fn。In step S220 shown in FIG. 2 , the pressure sensors 120_1 - 120 — n shown in FIG. 1 can sense a press event on the
舉例而言,圖3C是依照本發明一實施例說明觸控顯示裝置100的電路連接示意圖。於圖3C所示實施例中,觸控顯示裝置100可以包括壓力感測器120_11、120_12、120_13、120_14、120_15以及壓力感測器120_21、120_22、120_23、120_24、120_25。在細節上,壓力感測器120_11~120_15的第一端可以同時耦接至掃描線R1,壓力感測器120_21~120_25的第一端可以同時耦接至掃描線R2。壓力感測器120_11的第二端與壓力感測器120_21的第二端可以通過感測線C1耦接至處理電路130,壓力感測器120_12的第二端與壓力感測器120_22的第二端可以通過感測線C2耦接至處理電路130。依此類推,其餘壓力感測器120_13~120_15與120_23~120_25的第二端可以分別通過感測線C3、C4與C5耦接至處理電路130。For example, FIG. 3C is a schematic diagram illustrating the circuit connection of the
在本實施例中,掃描線R1與R2可以分別耦接至處理電路130,以依據處理電路130的掃描時序選擇性地開啟壓力感測器120_11~120_15或是壓力感測器120_21~120_25。當處理電路130通過掃描線R1驅動(開啟)壓力感測器120_11~120_15時,壓力感測器120_11~120_15可以感測顯示面板110上按壓事件,並將壓力感測結果通過感測線C1~C5提供給處理電路130。當處理電路130通過掃描線R2驅動(開啟)壓力感測器120_21~120_25時,壓力感測器120_21~120_25可以感測顯示面板110上的按壓事件,並將壓力感測結果通過感測線C1~C5提供給處理電路130。處理電路130可以接收壓力感測器120_11~120_15與壓力感測器120_21~120_25的壓力感測結果,以進行後續的按壓位置計算/判定。In this embodiment, the scan lines R1 and R2 can be respectively coupled to the
須注意的是,圖3C所示壓力感測器120_11~120_15、壓力感測器120_21~120_25、掃描線R1、掃描線R2、感測線C1~C5與處理電路130的連接方式只是一種示範例。圖1所示壓力感測器120_1~120_n與處理電路130可以參照圖3C所示壓力感測器120_11~120_15、壓力感測器120_21~120_25與處理電路130的相關說明加以類推,然而圖1所示壓力感測器120_1~120_n與處理電路130的具體實施不應受限於圖3C所示實施例。It should be noted that the connections between the pressure sensors 120_11 - 120_15 , the pressure sensors 120_21 - 120_25 , the scanning lines R1 , R2 , the sensing lines C1 - C5 and the
於圖2所示步驟S230中,圖1所示處理電路130可以依據壓力感測器120_1~120_n的壓力感測結果F1~Fn中的至少兩個來計算按壓事件的按壓位置。在一些實施例中,處理電路130可以預先設置(或動態調整)壓力閾值(threshold),以依據壓力閾值從壓力感測器120_1~120_n中選擇至少兩個作為多個經選壓力感測器。例如,處理電路130可以選擇壓力感測結果F1~Fn大於壓力閾值的壓力感測器來作為經選壓力感測器。或者,在另一些實施例中,處理電路130也可以依據壓力感測結果F1~Fn之間的關係來選用經選壓力感測器。例如,處理電路130可以選擇壓力感測結果F1~Fn中數值最大的至少兩個壓力感測器來作為經選壓力感測器。處理電路130可以依據這些經選壓力感測器的壓力感測結果進行多點分析,以計算按壓事件PE的按壓位置。In step S230 shown in FIG. 2 , the
在一些實施例中,處理電路130可以週期性開啟壓力感測器120_1~120_n,以定期接收壓力感測結果F1~Fn。當處理電路130在一週期時間內分析壓力感測結果F1~Fn並未通過壓力閾值,或壓力感測結果F1~Fn之間的壓力強度差異太小或是其他原因,使得處理電路130所選擇的經選壓力感測器的數量不足兩個時,處理電路130可以不進行按壓位置的計算。In some embodiments, the
壓力感測器120_1~120_n的位置為已知的元件置放位置。在一些實施例中,處理電路130可以依據多個經選壓力感測器的多個壓力感測結果及其位置計算多個經選壓力感測器的壓力重心,並以計算出來的壓力重心作為當前在顯示面板上110發生按壓事件PE的按壓位置。此外,在一些實施例中,按壓位置的按壓壓力可以為多個壓力感測結果中的至少兩個的力總和。舉例而言,假設圖1所示壓力感測器120_1~120_n皆被選為經選壓力感測器,並假設顯示面板110為X-Y二維平面,且壓力感測器120_1~120_n在X-Y二維平面上的座標分別表示為(x1, y1)、(x2, y2)、…、(xn, yn)。則在一些實施例中,處理電路130可以依據如下等式1、等式2與等式3來計算顯示面板110上的按壓位置的X-Y二維座標(xg, yg)及其按壓壓力Fg:
等式1
等式2
等式3
The positions of the pressure sensors 120_1 - 120 — n are known component placement positions. In some embodiments, the
舉例而言,圖4A、圖4B與圖4C是依照本發明一實施例說明按壓位置G的計算方式示意圖。請同時參照圖4A、圖4B以及圖4C。圖4A為依照本發明一實施例所繪示,顯示面板的上視透視示意圖。圖4A所示橫軸表示X-Y二維平面的X軸,而圖4A所示縱軸表示X-Y二維平面的y軸。圖4C為依照本發明一實施例所繪示,觸控顯示裝置100與壓力感測器120_1、120_3的側視透視示意圖。圖4C所示橫軸表示X-Y-Z三維空間的x軸,而圖4C所示縱軸表示X-Y-Z三維空間的Z軸。圖4B為以俯視視角繪示經選壓力感測器120_1、120_2、120_3與按壓位置G的相對位置示意圖。For example, FIG. 4A , FIG. 4B and FIG. 4C are schematic diagrams illustrating a calculation method of the pressing position G according to an embodiment of the present invention. Please refer to FIG. 4A , FIG. 4B and FIG. 4C at the same time. FIG. 4A is a schematic top perspective view of a display panel according to an embodiment of the present invention. The horizontal axis shown in FIG. 4A represents the x-axis of the X-Y two-dimensional plane, and the vertical axis shown in FIG. 4A represents the y-axis of the X-Y two-dimensional plane. FIG. 4C is a schematic side perspective view of the
於圖4A與4B所示實施例中,假設在顯示面板110上的按壓位置為G,且壓力感測器120_1、120_2以及120_3為處理電路130所選擇的經選壓力感測器。再假設,按壓位置G在X-Y二維平面上的座標為(xg, yg),經選壓力感測器120_1、120_2以及120_3在X-Y二維平面上的座標分別為(xa, ya)、(xb, yb)以及(xc, yc),按壓位置G的按壓壓力為Fg,以及經選壓力感測器120_1、120_2以及120_3所感測的壓力感測結果(按壓壓力)分別為Fa、Fb以及Fc。基於等式1、等式2與等式3,按壓位置G的X-Y二維座標(xg, yg)及其按壓壓力Fg可以表示為如下等式4、等式5與等式6:
等式4
等式5
等式6
In the embodiment shown in FIGS. 4A and 4B , it is assumed that the pressing position on the
在一些實施例中,壓力感測器120_1、120_2以及(或是)120_3可以為垂直壓力感測器,壓力感測結果Fa、Fb以及(或是)Fc可以為垂直壓力值。舉例而言,於圖4C所示實施例中,假設經選壓力感測器120_1、120_3為垂直壓力感測器,則壓力感測器120_1、120_3的壓力感測結果Fa、Fc可以為與Z軸平行的垂直壓力值,以去除在X軸以及Y軸上的壓力分量。此外,在本實施例中,經選壓力感測器120_1~120_3可以設置於顯示面板110下側的電路基板PL下方。經選壓力感測器120_1~120_3可以透過電路基板PL與處理電路130耦接。其中電路基板PL例如可以是軟性印刷電路板(Flexible Printed Circuit,FPC)、印刷電路板(Printed circuit board,PCB)或是其他電路板,本實施例並不設限。In some embodiments, the pressure sensors 120_1 , 120_2 and (or) 120_3 may be vertical pressure sensors, and the pressure sensing results Fa, Fb and (or) Fc may be vertical pressure values. For example, in the embodiment shown in FIG. 4C , assuming that the selected pressure sensors 120_1 and 120_3 are vertical pressure sensors, the pressure sensing results Fa and Fc of the pressure sensors 120_1 and 120_3 can be equal to Z Axis-parallel vertical pressure values to remove pressure components on the X and Y axes. In addition, in this embodiment, the selected pressure sensors 120_1 - 120_3 may be disposed under the circuit substrate PL on the lower side of the
綜上所述,本發明諸實施例所述的觸控顯示裝置100及顯示面板110的定位方法,可以配置多個壓力感測器120_1~120_n於顯示面板110的下方。壓力感測器120_1~120_n可以感測顯示面板110上的按壓事件PE。處理電路130可以依據壓力感測器120_1~120_n的壓力感測結果F1~Fn中的至少兩個來計算/定位發生於顯示面板110上的按壓事件PE的按壓位置G。如此一來,所述觸控顯示裝置100具有成本低、複雜度低、容易實現等功效。因此,觸控顯示裝置100更適合簡單應用。To sum up, in the positioning methods of the
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,任何所屬技術領域中具有通常知識者,在不脫離本發明的精神和範圍內,當可作些許的更動與潤飾,故本發明的保護範圍當視後附的申請專利範圍所界定者為準。Although the present invention has been disclosed above with the embodiments, it is not intended to limit the present invention. Anyone with ordinary knowledge in the technical field may make some changes and modifications without departing from the spirit and scope of the present invention. The scope of protection of the present invention should be defined by the scope of the appended patent application.
100:觸控顯示裝置 110:顯示面板 120_1~120_3、120_11~120_15、120_21~120_25、120_n:壓力感測器 130:處理電路 C1、C2、C3、C4、C5:感測線 F1、F2、Fn、Fa、Fb、Fc:壓力感測結果 Fg:按壓壓力 G:按壓位置 IMG、IMG_1、IMG_2:畫面 PE:按壓事件 PL:電路基板 R1、R2:掃描線 S210~S230:步驟 X、Y、Z:座標軸 x1、x2、xn、xa、xb、xc、xg、y1、y2、yn、ya、yb、yc、yg:座標 100: touch display device 110: display panel 120_1~120_3, 120_11~120_15, 120_21~120_25, 120_n: pressure sensor 130: Processing circuit C1, C2, C3, C4, C5: Sensing lines F1, F2, Fn, Fa, Fb, Fc: Pressure sensing results Fg: pressing pressure G: press position IMG, IMG_1, IMG_2: Screens PE: Press event PL: circuit board R1, R2: scan lines S210~S230: steps X, Y, Z: coordinate axes x1, x2, xn, xa, xb, xc, xg, y1, y2, yn, ya, yb, yc, yg: coordinates
圖1是依照本發明一實施例的觸控顯示裝置的電路方塊(circuit block)示意圖。 圖2是依照本發明一實施例的顯示面板的定位方法的流程圖。 圖3A與圖3B是依照本發明一實施例說明觸控顯示裝置的不同使用情境的上視透視示意圖。 圖3C是依照本發明一實施例說明觸控顯示裝置的電路連接示意圖。 圖4A為依照本發明一實施例所繪示,顯示面板的上視透視示意圖。 圖4B是依照本發明一實施例說明按壓位置的計算方式示意圖。 圖4C依照本發明一實施例所繪示,顯示面板與壓力感測器的側視透視示意圖。 FIG. 1 is a schematic diagram of a circuit block of a touch display device according to an embodiment of the invention. FIG. 2 is a flowchart of a positioning method for a display panel according to an embodiment of the invention. 3A and 3B are top perspective schematic diagrams illustrating different usage scenarios of the touch display device according to an embodiment of the present invention. FIG. 3C is a schematic diagram illustrating a circuit connection of a touch display device according to an embodiment of the present invention. FIG. 4A is a schematic top perspective view of a display panel according to an embodiment of the present invention. FIG. 4B is a schematic diagram illustrating a calculation method of a pressing position according to an embodiment of the present invention. FIG. 4C is a schematic side perspective view of a display panel and a pressure sensor according to an embodiment of the present invention.
100:觸控顯示裝置 110:顯示面板 120_1、120_2、120_n:壓力感測器 130:處理電路 F1、F2、Fn:壓力感測結果 IMG:畫面 PE:按壓事件 100: Touch display device 110: display panel 120_1, 120_2, 120_n: pressure sensor 130: processing circuit F1, F2, Fn: Pressure sensing results IMG: picture PE: Press event
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