201201086 五、發明說明： 【發明所屬之技術領域】 本發明係有關於觸控鍵盤裝置，且尤其有關於一種 感測手指按壓觸控面積以達到字鍵輸入之裝置。 【先前技術】 近年來，觸控板及觸控螢幕作為指令輸入工具已廣 泛應用於行動電話、電腦等電子產品。以觸控螢幕為 例，使用者可以方便地使用手接觸該觸控螢幕以輸入指 令。另外，以裝設在鍵盤上的觸控板為例，使用者可以 用手抬輕觸觸控板或是在上面滑動，以類似滑鼠操作的 方式’向電腦發出操作指令。 觸控板及觸控螢幕通常有電阻式、電容式、超音波 式及紅外線式等多種類型，其中又以電阻式觸控板的產 〇口取多，電阻式觸控板的設計主要又可區分為四線式、 五線式、八線式。而四線式觸控板因為成本及技術層面 較為成熟等有利因素，幾乎是所有觸控板業者最基本的 生產規格，其市場佔有率大約一半。其基本架構為一氧 化銦錫導電玻璃（ITOUndimn Tin Oxide) Glass)，一 導電薄膜（ITOFilm)，一般而言，IT0Glass 與 IT〇FUm ‘通後均使用+5V電壓，及一位於二者之間的絕緣間隔 态（Spacer)，其目的在於將IT〇 GUss與it〇 分 開以避免無觸摸時因導通造成短路而產生誤動作。 201201086 中華民國發明專利公開號200925956揭示一種「觸 控顯示裝置及其觸控方法」，其特徵在於該觸控顯示裝 置包括一觸控板、一與該觸控板相對設置之顯示屏、一 與該觸控板相鄰設置之壓力感應裝置及—微處理器。該 觸控板接雙外部壓力，並根據該外部壓力輸出對應之位 置識別信號；壓力感應裝置❹m加至該觸控板之外部 屢力，並輸出麼力信號；該微處理器其接收並筛選所需 之壓力信號’並根據所需之壓力信號輪出控制信號至該 顯示屏。 中華民國發明專利公開號200925966揭示一種「多 點觸控控―之控财法」，其賴在於提供—電阻式 ㈣板’㈣n觸體及至少-第二接觸體分別與 該電阻式觸控板接觸之一接觸時間差決定該第一接觸 體及該第二接觸體之接觸順序，並藉由該電阻式觸控板 ♦ 職測之電壓值依序決i第-接觸座標以及至少一 實際座標’且該第一接觸體係與該電阻式觸控板持續保201201086 V. OBJECTS OF THE INVENTION: TECHNICAL FIELD The present invention relates to a touch keyboard device, and more particularly to a device for sensing a finger pressing a touch area to achieve a word key input. [Prior Art] In recent years, touch panels and touch screens have been widely used as instruction input tools in electronic products such as mobile phones and computers. Taking a touch screen as an example, the user can conveniently touch the touch screen with his hand to input an instruction. In addition, taking the touchpad mounted on the keyboard as an example, the user can lift the touchpad by hand or slide it on, and issue an operation instruction to the computer in a mouse-like manner. Touchpads and touchscreens are usually available in resistive, capacitive, ultrasonic, and infrared types. Among them, the resistive touchpad has a large number of ports, and the resistive touchpad is designed primarily. It is divided into four-wire, five-wire, and eight-wire. The four-wire touch panel is almost the most basic production specification for all touch panel manufacturers because of its cost and technical maturity. Its market share is about half. The basic structure is ITOUndimn Tin Oxide Glass, a conductive film (ITOFilm). Generally, both IT0Glass and IT〇FUm' use +5V voltage, and one is located between them. The insulation spacer (Spacer) is designed to separate the IT〇GUss from the it〇 to avoid malfunction due to short-circuit caused by conduction when there is no touch. A touch display device includes a touch panel, a display screen disposed opposite the touch panel, and a display device. The present invention discloses a touch display device and a touch control method thereof. The touch sensing plate is adjacent to the pressure sensing device and the microprocessor. The touch panel is connected to the external pressure, and outputs a corresponding position identification signal according to the external pressure; the pressure sensing device ❹m is added to the external force of the touch panel, and outputs a force signal; the microprocessor receives and screens the force signal; Select the desired pressure signal 'and rotate the control signal to the display based on the desired pressure signal. The Republic of China Invention Patent Publication No. 200925966 discloses a "multi-touch control - control method", which relies on providing a resistive (four) board '(four) n-contact body and at least a second contact body and the resistive touch panel respectively The contact time difference of the contact determines the contact order of the first contact body and the second contact body, and the voltage value of the resistive touch panel is sequentially determined by the first contact contact coordinate and at least one actual coordinate And the first contact system and the resistive touch panel are continuously protected
持接觸；根據該實際座標之移動軌跡，決^至少一 指令。 I 惟經查習知專利前案都針對麼力感冑，即感測手指 的觸碰壓力再藉由受壓後其下方電阻的變化而產生對 應的觸控信號，對於手指接觸觸控板或觸控螢幕的面積 大小及其對於下方電阻變化的影響，則並無揭露，因此 201201086 驾知觸控板及觸控螢幕都有靈敏度不高或偏高的缺 失，常發生錯誤動作.，實則造成使用上之困擾及不便。 緣疋，本發明人乃針對上述需求，本著鍥而不捨的 精神與精益求精之目的，積極不斷的加以研究改良，並 ί系期之努力與試驗，終於開發設計出本發明。 【發明内容】Hold contact; according to the movement trajectory of the actual coordinate, at least one instruction is determined. I. However, the patents in front of the patents are all about the feeling of force, that is, the touch pressure of the finger is sensed and the corresponding touch signal is generated by the change of the resistance below the pressure, for the finger to touch the touchpad or The size of the touch screen and its influence on the change of the resistance below are not disclosed. Therefore, the touch panel and the touch screen are both lack of sensitivity or high, and often cause wrong actions. Trouble and inconvenience in use. In the meantime, the present inventors have developed and designed the present invention in response to the above-mentioned needs, in the spirit of perseverance and the purpose of excellence, and actively researching and improving, and exerting efforts and experiments. [Summary of the Invention]
本發明之主要目的係提供一種鍵盤裝置之觸控面 籲 積i化感測系統，其欲解決之問題點係針對習知壓控式 觸控板及觸控螢幕都針對壓力感測，即感測手指的觸碰 壓力再藉由受壓後其下方電阻的變化而產生對應的觸 控k號，對於手指接觸觸控板或觸控螢幕的面積大小及 其對於下方電阻變化的影響，則並無揭露，因此習知觸 控板及觸控螢幕都有靈敏度不高或偏高的缺失，常發生 錯誤動作，實則造成使用上之困擾及不便，而本發明即 φ 針對習知之問題點，而加以研發改良突破，以期使本發 明具有精準確實之功效Q 本發明係一種鍵盤裝置之觸控面積量化感測系統， 包括：一電阻式塑性觸控板；一黏貼在觸控板上面之印 刷層，其印製有複數個排列成矩陣之虛擬鍵；及一電路 式組件，包括一觸控面積計算模組及一微處理器；其中 觸壓觸控板之後，觸控面積計算模組即計算任一被壓按 虛擬鍵之觸控面積，若該觸控面積超過一預設門檻值， 201201086 觸控面積計算模組即產生一觸控信號，微處理器於收到 觸控信號後，即產生一對應壓按虛擬鍵之信號並將該信 號傳至一電腦主機進一步處理。 以下謹以具體實施例，且佐以圖式作詳細說明，俾 使審查委員能對於本發明之技術特徵，有更進一步之了 解。 【實施方式】 本發明係提供一種鍵盤裝置之觸控面積量化感測 系統，在此以裝設在電腦鍵盤上的觸控板，作為根據本 發明的較佳實施例來說明。 首先請參考圖1至圖5，其顯示一矩形觸控板1， 其包括一黏貼在上面之印刷層，印刷層上印製有複數個 排列成矩陣的符號及或數字作為虛擬鍵10供使用者壓 按選擇，及一電路式組件其包括一觸控面積計算模組20 及一微處理器30。該電路式組件可以設置在一專用電路 板上，或是併入鍵盤的電路板。 參考圖1及圖3A ’觸控板1係一電阻式觸控板且包 括一上基板（由聚對苯二甲酸乙二醇酯（p〇lyethyiene terephthalate) PET 製成）1〇1，一第一導電層 1〇2，其 與上基板11接合’ 一第一感測層（由感測材料（sensing material)製成）103 ’其上方與第一導電層1〇2接合而 其下方則向内凸出’ 一第二感測層（由感測材料製 6 [S] 201201086 成）104，其與第一感測層1〇3相隔一段距離，一第二導 電層105，其上端與第二感測層1〇4接合，及一下基板 108 ’其亦由pet製成。 在第一導電層102與苐二導電層1〇5之間則設置複 數個柱體107，其柱體1〇7下端接合第二導電層1〇5 , 而其柱體107上端則藉由一框膠層1〇6而與第一導電層 102固定接合，其中該柱體17與第一感測層1〇3係呈平 行間隔交錯配置。 電腦開機時，觸控面積計算模組2〇即啟動。 各虛擬鍵10係分成複數個點其配置成一陣列（即陣 列式的點），各點以平面座標（χ ’ Y)表示，即分成χ χ γ 個點，例如第一點可以用座標（X1，Υ1)表示。在一實施 例，一個lcm平方的虛擬鍵10可分成10 χ 1〇個點。 以圖2Α及圖3Β為例，當一手指輕輕地放在觸控板 1的上基板1 ο 1 (以小箭號表示手指指紋與觸控板i的 接觸面積較小，因此一虛擬鍵10只有一小部分的上基 板101凹陷），要說明的是只要陰影線接觸到的點都算 是該點已被壓按。因此圖2A手指壓按在一虛擬鍵1〇的 壓按面積，以其對應觸控部分來計算是1〇〇個點中的1〇 個。觸控面積計算模組20即根據一預設門檻值來判定 是否產生一觸控信號，該預設門檻值係可設定為：若百 分之八十以上的點被陰影線佔據即表示該虛擬鍵1〇已 201201086 被壓按，所以觸控面積計算模組2〇會產生一觸控信號， 倘若圖2A由於只有百分之十的點被陰影線佔據，即^ 示該虛擬鍵1〇未被壓按，所以觸控面積計算模組2〇不 會產生觸控信號》 繼而以圖2B及3C為例，其顯示手指用力壓按在 觸控板1的上基板1Q1 (以大箭號表示手指指紋與觸控 板1的接觸面積較A，或手指對應按壓力道克數增大， 瞻目此一虛擬鍵10大部分的上基板1〇1凹陷），該觸控面 積計算模組20感測到被陰影線佔據的點數增加，例如 在此例點數增加到9〇個，由於百分之九十的點被陰影 線佔據，即表示手指下方的虛擬鍵1〇已被手指壓按， 所以觸控面積計算模組20會產生一觸控信號。 在此要說明的是本發明之實施技術係電阻式壓力 感測，當手指壓按觸控板丨上之虛擬鍵丨〇後，當第一 • 感測層1〇3與第二感測層1〇4接觸時會造成短路，產生 %壓降（即改變電阻值）；但是必須要有足夠數目的第一 感測層103與第二感測層104接觸才會產生足夠的電壓 降，才能通過預設門檻值而產生觸控信號。圖3β的輕 微碰觸一虛擬鍵10只產生一個第一感測層103與第二 感測層104的接觸（這只是範例），所以無法產生足夠的 電壓降，不能通過預設門檻值因而無法產生觸控信號。 相反地，圖3C的用力壓按一虛擬鍵而產生多個第一 201201086The main object of the present invention is to provide a touch surface accumulating sensing system for a keyboard device, and the problem to be solved is to apply pressure sensing to a pressure sensing touch panel and a touch screen. Measuring the touch pressure of the finger and then generating a corresponding touch k number by the change of the resistance under the pressure, for the size of the touch surface of the touch panel or the touch screen and its influence on the change of the resistance below, There is no disclosure, so the conventional touchpad and the touch screen have the disadvantages of low sensitivity or high sensitivity, and often cause wrong actions, which in fact causes troubles and inconveniences in use, and the present invention is φ for the problem of the conventional problem, and The present invention is a touch area quantitative sensing system for a keyboard device, comprising: a resistive plastic touch panel; a printing layer adhered to the touch panel The printed circuit has a plurality of virtual keys arranged in a matrix; and a circuit component comprising a touch area calculation module and a microprocessor; wherein the touch surface is touched after the touch panel is touched The calculation module calculates the touch area of any pressed virtual key. If the touch area exceeds a preset threshold, the 201201086 touch area calculation module generates a touch signal, and the microprocessor receives the touch. After the signal is controlled, a signal corresponding to pressing the virtual key is generated and transmitted to a computer host for further processing. The following is a detailed description of the embodiments, and the detailed description of the drawings, so that the reviewer can have a further understanding of the technical features of the present invention. [Embodiment] The present invention provides a touch area quantization sensing system for a keyboard device, and a touch panel mounted on a computer keyboard is described herein as a preferred embodiment in accordance with the present invention. Referring first to FIG. 1 to FIG. 5, a rectangular touch panel 1 is shown, which includes a printed layer adhered thereon, and a plurality of symbols and/or numbers arranged in a matrix are printed on the printed layer as virtual keys 10 for use. Pressing the selection, and a circuit component includes a touch area calculation module 20 and a microprocessor 30. The circuit component can be placed on a dedicated circuit board or a circuit board incorporated into the keyboard. Referring to FIG. 1 and FIG. 3A, the touch panel 1 is a resistive touch panel and includes an upper substrate (made of polyethylene terephthalate (PET)). a conductive layer 1 〇 2 which is bonded to the upper substrate 11 'a first sensing layer (made of a sensing material) 103 ′ above which is bonded to the first conductive layer 1 〇 2 and below a second sensing layer (made of a sensing material 6 [S] 201201086) 104, which is spaced apart from the first sensing layer 1〇3, a second conductive layer 105, the upper end thereof The second sensing layer 1〇4 is bonded, and the lower substrate 108' is also made of pet. Between the first conductive layer 102 and the second conductive layer 1〇5, a plurality of pillars 107 are disposed, the lower ends of the pillars 1〇7 are joined to the second conductive layer 1〇5, and the upper ends of the pillars 107 are provided by a The sealant layer 1〇6 is fixedly coupled to the first conductive layer 102, wherein the pillar 17 and the first sensing layer 1〇3 are arranged in a staggered arrangement in parallel. When the computer is turned on, the touch area calculation module 2 starts. Each virtual key 10 is divided into a plurality of points which are arranged in an array (ie, an array of points), and each point is represented by a plane coordinate (χ 'Y), that is, divided into χ γ γ points, for example, the first point can be used with coordinates (X1) , Υ 1) indicates. In one embodiment, a lcm squared virtual key 10 can be divided into 10 χ 1 〇 dots. Taking FIG. 2 and FIG. 3 as an example, when a finger is gently placed on the upper substrate 1 of the touch panel 1 ο 1 (the small arrow indicates that the contact area between the finger fingerprint and the touch panel i is small, so a virtual key 10 only a small portion of the upper substrate 101 is recessed), it should be noted that as long as the point of contact with the hatched line is considered to have been pressed. Therefore, the finger of Fig. 2A is pressed against the pressing area of a virtual key 1 ,, and one of the 1 〇〇 points is calculated by the corresponding touch portion. The touch area calculation module 20 determines whether a touch signal is generated according to a preset threshold value, and the preset threshold value can be set to: if more than 80% of the points are occupied by hatching, the virtual The key 1〇 has been pressed by 201201086, so the touch area calculation module 2〇 generates a touch signal. If only 10% of the points in Fig. 2A are occupied by the hatching, the virtual key 1 is not displayed. After being pressed, the touch area calculation module 2 does not generate a touch signal. Then, taking FIGS. 2B and 3C as an example, the finger is pressed against the upper substrate 1Q1 of the touch panel 1 (indicated by a large arrow) The contact area of the finger fingerprint with the touchpad 1 is A, or the number of pressure points corresponding to the finger is increased, and the upper substrate of the virtual key 10 is recessed. The touch area calculation module 20 It is sensed that the number of points occupied by the hatching increases, for example, in this case, the number of points is increased to 9〇, and since 90% of the points are occupied by the hatching, it means that the virtual key 1〇 under the finger has been pressed by the finger. Pressing, the touch area calculation module 20 generates a touch signal. It should be noted that the implementation technique of the present invention is resistive pressure sensing. When the finger presses the virtual key on the touchpad, the first sensing layer 1〇3 and the second sensing layer are used. When 1〇4 contacts, it will cause a short circuit, resulting in a % voltage drop (ie, changing the resistance value); however, a sufficient number of first sensing layers 103 must be in contact with the second sensing layer 104 to generate a sufficient voltage drop. A touch signal is generated by a preset threshold value. The slight touch of a virtual key 10 of FIG. 3β only produces a contact between the first sensing layer 103 and the second sensing layer 104 (this is only an example), so that a sufficient voltage drop cannot be generated, and the threshold cannot be exceeded. Generate a touch signal. Conversely, the force of FIG. 3C is pressed by a virtual key to generate a plurality of first 201201086
按，所以產生足夠的電壓降，而 一觸控信號。 ，而當若百分之八 良示該虛擬鍵ίο已被慶 而通過預設門檻值而產生Press, so generate enough voltage drop, and a touch signal. And if eight percent indicates that the virtual key ίο has been celebrated and is generated by a preset threshold
精由計算出手指壓按在虛擬鍵10時的觸控面積大 小，可大幅增加精準度，以去除因為習知觸控板及觸控 螢幕的靈敏度不高或偏高而導致的錯誤動作。 本發明的動作流程圖則可以參考圖5，當鍵盤啟動時， 微處理器30會持續掃瞄觸控板i以感測手指是否壓按 • 在觸控板1上，若有，觸控面積計算模組20即計算手 指壓按在觸控板1的某一虛擬鍵1〇上的觸控面積是否 大於一預設門檻值，若大於該預設門檻值，則產一觸控 信號並將該信號傳送至微處理器3〇，當微處理器3〇收 到该觸控k號時，即產生對應被壓按虛擬鍵1 〇鍵碼的 信號’並將該信號傳送到電腦主機40作進一步處理， 而完成觸控按鍵動作。 上述只是以一手指為範例來說明，本發明亦允許複 201201086 數個手指㈣在觸控板i上觸摸及錢，對於任一被壓 :的虛擬鍵10只要符合上述條件都可產生對應的觸控 乜嬈即複數組觸控信號供次一級的微處理器如處理， 即對於電腦鍵盤上的觸控板，本發明可實施至少一點觸 控或多點觸控。 由上述本發明的實施例可知，本發明利用手指壓按It is calculated by the size of the touch area when the finger is pressed against the virtual key 10, which can greatly increase the accuracy to remove the wrong action caused by the low sensitivity or high sensitivity of the conventional touch panel and the touch screen. Referring to FIG. 5, when the keyboard is activated, the microprocessor 30 continuously scans the touchpad i to sense whether the finger is pressed. • On the touchpad 1, if any, the touch area The calculation module 20 calculates whether the touch area of the finger pressing on a virtual key 1 of the touch panel 1 is greater than a preset threshold. If the preset threshold is greater than the preset threshold, a touch signal is generated and The signal is transmitted to the microprocessor 3A. When the microprocessor 3 receives the touch k number, a signal corresponding to the pressed virtual key 1 〇 key code is generated and transmitted to the computer host 40. Further processing, and completing the touch button action. The above description is only taking one finger as an example. The present invention also allows a plurality of fingers (4) to touch and pay on the touchpad i. For any pressed virtual key 10, the corresponding touch can be generated as long as the above conditions are met. The control layer is a complex array of touch signals for processing by a microprocessor of the next stage, that is, for a touch panel on a computer keyboard, the present invention can implement at least one touch or multi-touch. As can be seen from the above embodiments of the present invention, the present invention uses finger pressing
觸控板時’計算出各手指在觸控板上的觸控面積，若超 過預設門檻值’則產生一觸控信號，微處理器收到觸控 信號後才產生-顯示信號至電腦主機’以便電腦主機能 進一步處理，而完成觸控按鍵動作。藉由計算出手指壓 按在虛擬鍵時的觸控面積大小，可大幅增加觸控按鍵精 準度。 月 上述實施例僅為說明本發明之原理及功效，並非用 乂限制本發明之主要技術特徵及範圍。因此習於此技術 之人士對上述實施例進行修改及變化仍不脫本發明之 精神。本發明已具備產業上利用性、新穎性及進步性， 並符合發明專利要件，爰依法提起申請。 【圖式簡單說明】 圖1是根據本發明的觸控板的立體圖，並顯示手指輕 放在觸控板上的情形； 圖2A是圖1之圓圈b所示區域的放大圖； 201201086 圖2B與圖2A類似，說明手指用力壓按觸控板之後， 手心在虛擬鍵的對應觸控面積增加的情形，作為圖Μ 的對照； 圖3A是沿著圖！線a - a看去的剖視圖； 圖3B與圖3A類似，其對應圖2A ; 圖3C與圖3A類似，是手指用力壓按在觸控板之虛擬 鍵後’觸控板的數個位置因為被手指壓按而彈性凹陷， 因而增加觸控面積’再進一步產生對應虛擬鍵的觸控信 號，其對應圖2B ; 圖4疋本發明處理觸控信號的方塊圖；及 圖5是本發明的動作流程圖。 【主要元件符號說明】 1觸控板 10虛擬鍵 101上基板 102第一導電層 103第一感測層 104第二感測層 105第二導電層 106框膠層 107柱體 m 201201086 108下基板 20觸控面積計算模組 30微處理器 40電腦主機‘When the touchpad calculates the touch area of each finger on the touchpad, if it exceeds the preset threshold value, a touch signal is generated, and the microprocessor generates the display signal to the host computer after receiving the touch signal. ' So that the computer host can further process, and complete the touch button action. By calculating the touch area of the finger press when pressing the virtual key, the touch key precision can be greatly increased. The above-described embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the main technical features and scope of the present invention. Therefore, those skilled in the art can make modifications and changes to the above embodiments without departing from the spirit of the invention. The invention has the industrial applicability, the novelty and the progressiveness, and conforms to the invention patent requirements, and files an application according to law. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a touch panel according to the present invention, and shows a case where a finger is lightly placed on a touch panel; FIG. 2A is an enlarged view of a region indicated by a circle b of FIG. 1; 201201086 FIG. Similar to FIG. 2A, the case where the finger touches the touchpad hardly, and the corresponding touch area of the virtual key in the virtual key increases, as a comparison of the figure; FIG. 3A is along the figure! Figure 3B is similar to Figure 3A, which corresponds to Figure 2A. Figure 3C is similar to Figure 3A. It is the position of the touchpad after the finger presses the virtual key on the touchpad. Pressed by a finger and elastically recessed, thereby increasing the touch area' to further generate a touch signal corresponding to the virtual key, which corresponds to FIG. 2B; FIG. 4 is a block diagram of the touch signal processed by the present invention; and FIG. 5 is a block diagram of the present invention Action flow chart. [Main component symbol description] 1 touch panel 10 virtual key 101 upper substrate 102 first conductive layer 103 first sensing layer 104 second sensing layer 105 second conductive layer 106 sealant layer 107 cylinder m 201201086 108 lower substrate 20 touch area calculation module 30 microprocessor 40 computer host '