201222333 六、發明說明： 【發明所屬之技術領域】 [0001] 本發明涉及一種具有文本輸入功能的電子裝置及方法， 尤其涉及一種通過感應手指運動擦除所覆蓋區域内的顯 示内容的電子裝置及方法。 【先前技術】 [0002] 很多可攜式移動裝置如手機、PDA(個人數位助理）等可以 通過手寫方式實現文本輸入及文本校正。目前，蘋果公 司已應用了一種通過檢測手指在顯示幕幕上的手勢，擦 除手指運動所覆蓋的區域内顯示的文本的方法。但是， 該方法要求顯示幕幕需具備手勢識別的功能，如在判斷 觸摸點的位置同時還需要確定手指運動的方向等因素， 這對顯示幕幕本身提出了很高要求。 【發明内容】 [0003] 有鑒於此，有必要提供一種通過偵測手指運動擦除所覆 蓋區域内的顯示内容的電子裝置及方法，以解決上述的 問題。 [0004] 一種具文本輸入功能的電子裝置，包括一紅外感應單元 、一聲音偵測單元、一顯示單元、一處理單元及一存儲 單元，該紅外感應單元、聲音偵測單元、顯示單元及存 儲單元分別與處理單元連接。所述紅外感應單元用於偵 測手指在顯示單元上的觸摸；所述聲音偵測單元用於在 顯示單元被觸摸時，記錄手指與顯示單元之間摩擦產生 的聲音；所述存儲單元用於存儲一個或若干標準聲音； 及所述處理單元，用於將聲音偵測單元記錄的手指與顯 099140112 表單編號 A0101 第 4 頁/共 15 頁 0992069907-0 201222333 示單元摩擦產生的聲音與存儲單元内存儲的一個或若干 標準聲音進行比較，當比較結果一致時，所述處理單元 根據所述紅外感應單元偵測到的手指在顯示單元上的觸 摸確定觸摸覆蓋的區域及該區域内的顯示内容，並且對 該區域内的顯示内容執行擦除操作。 [0005] ❹ [0006] Ο [0007] 一種電子裝置的執行文本輸入功能的方法，該電子裝置 包括一紅外感應單元、一聲音偵測單元、一顯示單元及 一存儲單元，該方法包括步驟：通過紅外感應單元偵測 手指在顯示單元上的觸摸；在顯示單元被觸摸時，通過 聲音偵測單元記錄手指與顯示單元之間摩擦產生的聲音 ;將記錄的手指與顯示單元摩擦產生的聲音與存儲的一 個或若干標準聲音進行比較；及當比較結果一致時，根 據偵測到的手指在顯示單元上的觸摸確定觸摸覆蓋的區 域及該區域内的顯示内容，並且對該區域内的顯示内容 執行擦除操作。 本發明電子裝置不需要顯示幕幕本身具有手勢識別功能 ，降低了對元器件的要求。 【實施方式】 請參考圖1，本發明電子裝置100包括一紅外感應單元11 、一聲音偵測單元12、一顯示單元13、一處理單元14及 一存儲單元15。該紅外感應單元11、聲音偵測單元12、 顯示單元13及存儲單元15分別與處理單元14連接。該電 子裝置100為具文本輸入功能的可攜式裝置，例如電腦、 手機及PDA等。顯示單元13用於顯示電子裝置100輸入的 文本資訊。 099140112 表單編號Α0101 第5頁/共15頁 0992069907-0 201222333 [0008] [0009] [0010] [0011] 该紅外感應單元11分佈在顯示單元1 3的四周，用於偵測 手指在顯示單元13上的觸摸。該紅外感應單元u可包括 成對放置的紅外線發射管和紅外線接收管。如圖2中所示 ，在水準方向上的所有成對的紅外線發射管與紅外線接 收管的連線幾乎平行，在垂直方向上的所有成對的紅外 線發射管與紅外線接收管的連線也幾乎平行，形成水準 垂直交叉的紅外線矩陣。用戶在觸摸顯示單元13時手 指就會擋住經過該位置的水準與垂直兩條紅外線，因而 可以判斷出職點在顯示單元13的位置，並根據多個觸 摸點的位置，可以確定觸摸覆蓋的區域。 該聲音偵測單元12用於在制麵示單印被觸摸時， 記錄手指與顯示單元13之間摩擦產生的聲音。該聲音偵 測單元12可如圖2所示設置在顯示單元13的一角，可也根 據需要設置在顯示單元周圍任何位置。 存儲單元15用於提供用於顯示資料的存儲空間。存儲單 元15内還存射-個或若轉準聲音。該—個或若干標 準聲音代表電子裝置刚啟動擦除命令時手指與顯示單元 13之間摩擦產生的標準聲音。 處理單元u用於將聲音_單元12記錄的手指與顯示單 心摩擦產生的聲音與存儲單元15内存儲的—個或若干 標準聲音進行比較，在比較結果—致時，根據所述紅外 感應單元11_到的手指在㈣單元13上的觸摸確定 觸摸覆蓋的區域及該區域内的顯示内容，並且對該區域 内的顯示内容執行擦除操作。 099140112 表單編號A0101 第6頁/共15頁 0992069907-0 201222333 [0012] [0013] [0014]Ο Ο [0015] 處理單元14還用於在執行擦除操作後回應用戶的輸入在 所覆蓋的區域内輸入新的顯示内容。如圖3中，觸摸所覆 蓋的區域内對應的顯示内容為“7 5 9 1 6” ；如圖4中 ，觸摸所覆蓋的區域内原來顯示的内容“7 5 9 1 6” 被擦除，該區域顯示内容“更改為“3 2 8 5 4” 。 請參閱圖5，為本發明電子裝置在優選實施方式下感應手 指運動擦除所覆蓋區域内的顯示内容的的方法流程圖。 步驟S31，通過紅外感應單元11偵測顯示單元13是否被觸 摸，若是，流程至步驟S32，若否，重複該步驟。步驟 S32，通過聲音偵測單元12記錄手指與顯示單元13之間摩 擦產生的聲音。步驟S33，將聲音偵測單元12記錄的手指 與顯示單元13摩擦產生的聲音與存儲單元15内存儲的一 個或若干標準聲音進行比較，判斷是否一致，若一致， 流程至步驟S34，若否，流程跳轉至步驟S31。步驟S34 ，根據紅外感應單元11偵測到的手指在顯示單元13上的 觸摸確定觸摸覆蓋的區域及該區域内對應的顯示内容。 步驟S35，對觸摸覆蓋的區域内的顯示内容執行擦除操作 。步驟S36，回應用戶的輸入在觸摸覆蓋的區域内輸入新 的顯示内容。 儘管對本發明的優選實施方式進行了說明和描述，但是 本領域的技術人員將領悟到，可以作出各種不同的變化 和改進，這些都不超出本發明的真正範圍。因此期望， 本發明並不局限於所公開的作為實現本發明所設想的最 佳模式的具體實施方式，本發明包括的所有實施方式都 有所附權利要求書的保護範圍内。 099140112 表單編號Α0101 第7頁/共15頁 0992069907-0 201222333 【圖式簡單說明】 [0016] 圖1為本發明電子裝置在優選實施方式下的硬體架構圖。 [0017] 圖2為本發明電子裝置在優選實施方式下手指運動所覆蓋 區域的顯示示意圖。 [0018] 圖3為本發明電子裝置在優選實施方式下手指運動所覆蓋 區域内的需校正的顯示内容的顯示示意圖。 [0019] 圖4為本發明電子裝置在優選實施方式下手指運動所覆蓋 區域内校正後的顯示内容的顯示示意圖。 [0020] 圖5為本發明電子裝置在一優選實施方式下感應手指運動 擦除所覆蓋區域内的顯示内容的的方法流程圖。 【主要元件符號說明】 [0021] 電子裝置：100 [0022] 紅外感應單元：11 [0023] 聲音偵測單元：12 [0024] 顯示單元：13 [0025] 處理單元：14 [0026] 存儲單元：15 0992069907-0 099140112 表單編號A0101 第8頁/共15頁201222333 VI. Description of the Invention: [Technical Field] [0001] The present invention relates to an electronic device and method having a text input function, and more particularly to an electronic device for erasing display content in a covered area by sensing finger motion and method. [Prior Art] [0002] Many portable mobile devices such as mobile phones, PDAs (personal digital assistants) and the like can implement text input and text correction by handwriting. Currently, Apple has applied a method of erasing the text displayed in the area covered by the finger movement by detecting the gesture of the finger on the display screen. However, this method requires the display screen to have the function of gesture recognition, such as determining the position of the touch point and also determining the direction of the finger movement, which places high demands on the display screen itself. SUMMARY OF THE INVENTION [0003] In view of the above, it is necessary to provide an electronic device and method for erasing display content in a covered area by detecting finger motion to solve the above problems. [0004] An electronic device having a text input function includes an infrared sensing unit, a sound detecting unit, a display unit, a processing unit, and a storage unit, the infrared sensing unit, the sound detecting unit, the display unit, and the storage unit The units are each connected to a processing unit. The infrared sensing unit is configured to detect a touch of a finger on the display unit; the sound detecting unit is configured to record a sound generated by friction between the finger and the display unit when the display unit is touched; the storage unit is configured to: Storing one or several standard sounds; and the processing unit for using the sound recorded by the sound detecting unit to generate sound and the sound in the storage unit with the display unit 099140112 Form No. A0101 Page 4 of 15 0992069907-0 201222333 The stored one or a plurality of standard sounds are compared. When the comparison result is consistent, the processing unit determines the touch coverage area and the display content in the area according to the touch detected by the infrared sensing unit on the display unit. And an erase operation is performed on the display content in the area. [0006] [0006] A method for performing a text input function of an electronic device, the electronic device comprising an infrared sensing unit, a sound detecting unit, a display unit and a storage unit, the method comprising the steps of: The infrared sensing unit detects the touch of the finger on the display unit; when the display unit is touched, the sound generated by the friction between the finger and the display unit is recorded by the sound detecting unit; the sound generated by the friction between the recorded finger and the display unit is Comparing one or several standard sounds stored; and when the comparison result is consistent, determining the area covered by the touch and the display content in the area according to the detected touch of the finger on the display unit, and displaying content in the area Perform an erase operation. The electronic device of the invention does not need the display screen itself to have a gesture recognition function, which reduces the requirements on components. Embodiment 1 Referring to FIG. 1, an electronic device 100 of the present invention includes an infrared sensing unit 11, a sound detecting unit 12, a display unit 13, a processing unit 14, and a storage unit 15. The infrared sensing unit 11, the sound detecting unit 12, the display unit 13, and the storage unit 15 are respectively connected to the processing unit 14. The electronic device 100 is a portable device having a text input function, such as a computer, a mobile phone, a PDA, and the like. The display unit 13 is for displaying text information input by the electronic device 100. 099140112 Form No. 1010101 Page 5 of 15 0992069907-0 201222333 [0009] [0011] [0011] The infrared sensing unit 11 is distributed around the display unit 13 for detecting a finger on the display unit 13 Touch on. The infrared sensing unit u may include an infrared emitting tube and an infrared receiving tube that are placed in pairs. As shown in Fig. 2, all pairs of infrared emission tubes in the horizontal direction are almost parallel to the line connecting the infrared receiving tubes, and the connection of all pairs of infrared emitting tubes and infrared receiving tubes in the vertical direction is almost Parallel, forming an infrared matrix with horizontal crossings. When the user touches the display unit 13, the finger blocks the two infrared rays passing through the position and the vertical direction, so that the position of the employment point on the display unit 13 can be determined, and according to the positions of the plurality of touched points, the area covered by the touch can be determined. . The sound detecting unit 12 is configured to record the sound generated by the friction between the finger and the display unit 13 when the printed surface shows that the single print is touched. The sound detecting unit 12 can be disposed at a corner of the display unit 13 as shown in Fig. 2, and can be disposed at any position around the display unit as needed. The storage unit 15 is for providing a storage space for displaying materials. The storage unit 15 also stores one or if the sound is turned. The one or more standard sounds represent the standard sound produced by the friction between the finger and the display unit 13 when the electronic device first initiates the erase command. The processing unit u is configured to compare the sound generated by the finger recorded by the sound unit 12 with the display single core and the one or several standard sounds stored in the storage unit 15, and when the comparison result is obtained, according to the infrared sensing unit The touch of the 11_to finger on the (four) unit 13 determines the area covered by the touch and the display content in the area, and performs an erase operation on the display content in the area. 099140112 Form No. A0101 Page 6 of 15 0992069907-0 201222333 [0012] [0014] The processing unit 14 is further configured to respond to the user's input in the covered area after performing the erasing operation. Enter a new display content. As shown in FIG. 3, the corresponding display content in the area covered by the touch is “7 5 9 1 6”; as shown in FIG. 4, the content “7 5 9 1 6” originally displayed in the area covered by the touch is erased. The area display content is changed to "3 2 8 5 4". Please refer to FIG. 5, which is a flowchart of a method for sensing the display content in the covered area by the finger motion in the preferred embodiment of the electronic device of the present invention. The infrared sensing unit 11 detects whether the display unit 13 is touched. If yes, the flow goes to step S32, and if not, repeats the step. In step S32, the sound generated by the friction between the finger and the display unit 13 is recorded by the sound detecting unit 12. In step S33, the sound generated by the friction between the finger recorded by the sound detecting unit 12 and the display unit 13 is compared with one or several standard sounds stored in the storage unit 15 to determine whether they are consistent. If they are consistent, the process goes to step S34, if no. The flow jumps to step S31. In step S34, the area covered by the touch and the corresponding display in the area are determined according to the touch of the finger detected by the infrared sensing unit 11 on the display unit 13. Step S35, performing an erasing operation on the display content in the area covered by the touch. In step S36, inputting new display content in the area covered by the touch in response to the user's input. Although the preferred embodiment of the present invention is described and It will be appreciated that those skilled in the art will appreciate that various changes and modifications can be made without departing from the true scope of the invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT All embodiments included in the present invention are within the scope of the appended claims. 099140112 Form No. 1010101 Page 7 of 15 0992069907-0 201222333 [Simple Description] [0016 1 is a hardware architecture diagram of an electronic device according to a preferred embodiment of the present invention. [0017] FIG. 2 is a schematic diagram showing the display of an area covered by finger movement in a preferred embodiment of the electronic device of the present invention. Inventive display of display content to be corrected in an area covered by finger movement in a preferred embodiment [0019] FIG. 4 is a schematic diagram showing display of corrected display content in an area covered by finger movement in a preferred embodiment of the electronic device of the present invention. [0020] FIG. 5 is a schematic diagram of an electronic device according to the present invention. Flowchart of the method for erasing the display content in the covered area. [Main component symbol description] [0021] Electronic device: 100 [0022] Infrared sensing unit: 11 [0023] Sound detecting unit: 12 [0024] Display Unit: 13 [0025] Processing unit: 14 [0026] Storage unit: 15 0992069907-0 099140112 Form number A0101 Page 8 of 15