200809703 IAC060089.TW 2113 Itwf.doc/e 九、發明說明： 【發明所屬之技術領域】 本發明是有關於一種電子裝置的警示方法，且特別是 有關於一種利用電子標籤（Radio Frequency Identification Tag，RFID Tag)的偵測以預防手持電子裝置遺失之方法。 【先前技術】 隨著科技的進步，許多手持電子裝置，例如手機、個 人數位助理（Personal Digital Assistant，PDA)、數位相 機、數位攝影機以及MP3隨身聽（MPEG audio layer 3 Player ’ MP3 Player)的問世，不僅讓現代人隨時隨地可以 通訊聯絡，也_享受攝影及影音所帶來的樂趣。 ，為了滿足使用者可以隨身攜帶上述手持電子 手持電子裝置，除了具有強大且多樣化的、功能之 卜’更“有體積小以及重量輕的特 便隨身攜帶。 x仗仟便用者可以方 而吊冒發生手持電子裝置不慎遺 ^ ’因 旦手持電子裝置遺失或遭竊，=人祕叫形。一 失，也可能會因為儲存在二=遭受不小 【發明内容】 本發明之目的是提供 預防手持電子裝置遺失的 200809703 IAC060089.TW 21131twf.doc/e ===手持電子裝置是否已離開身邊，以 失的方目的讀供—種預防手持電子裝置遺 :自手持％子裝置被竊時，可以即時警告使 子裝置ίίίίΪ其他目的，本發明提出一種預防手持電 遣失的方法。此方法包括由手持電子200809703 IAC060089.TW 2113 Itwf.doc/e IX. Description of the Invention: [Technical Field] The present invention relates to an electronic device warning method, and more particularly to an electronic tag (Radio Frequency Identification Tag, RFID) Tag) detection to prevent loss of handheld electronic devices. [Prior Art] With the advancement of technology, many handheld electronic devices, such as mobile phones, personal digital assistants (PDAs), digital cameras, digital cameras, and MP3 players (MPEG audio layer 3 Player 'MP3 Player) have come out. It not only allows modern people to communicate at any time and any place, but also enjoys the fun of photography and audio and video. In order to satisfy the user's ability to carry the above-mentioned hand-held electronic handheld electronic device with him, in addition to having a powerful and diverse function, it is more "small" and has a small size and light weight, so that it can be carried around. Inadvertently, the handheld electronic device is accidentally left behind. 'Because the handheld electronic device is lost or stolen, the name is secret. If it is lost, it may be stored because it is not small. [Invention] The purpose of the present invention is Providing the prevention of the loss of the handheld electronic device 200809703 IAC060089.TW 21131twf.doc/e ===Whether the handheld electronic device has left the side, reading the supply for the lost purpose - preventing the handheld electronic device: when the handheld device is stolen The invention can promptly alert the sub-device to an additional purpose, and the present invention provides a method for preventing hand-held electric loss. The method includes handheld electronic
後，^1驗—f子標籤。電子標籤接收第—射頻π號 射頻i號:Γ，射頻，。接著，手持電子裝置接收第二b 當此第射二斷Γ接收之第二射頻訊號是否中斷。 述之電子彳》^!^中叫、’立刻發出—則警告訊息，而上 Tag)。 已括被動式射頻識別標籤（Passive RFID 述之子裝置敎的方法，其中當上 射頻_二？：!射頻訊號之後，即對應發出第二 子標鐵^驟持電子裝置發射第一射頻訊號至電 電子襟籤ί續ί射ί績發射第「射頻訊號至電子標籤以使 發射第-射;二射頻訊號，或是每間隔一預定時間 射頻汛5虎至電子標籤。 之預定時防手持f子裝置遺失的方法，其中上逑 秒之間行設定，較佳為介於1秒至10 根據於1秒至5秒之間。 之發4遊止:自=手持電子裝置遺失的方法，其中上迷 。口 Λ心之方法包括發出警告聲音。 乂據上述之預防手持電子裝置遺失的方法，其中上迷 200809703 IAC060089.TW 21131twf.doc/e 之弟一射頻訊號以及第二射箱 125KHZ至2.5GHz之間的電磁皆為頻率包括介於 本發明另外提出一種預防 法。此方法包括好持電子裝置遺失的方 射之-第三射頻訊號。接著，匈=好標籤主動發 是否中斷。當此第三射頻訊號中=钱收之弟三射頻訊號 訊息，而上述之電子標籤包括主立刻發出一則警告 RFID Tag )。 式射頻識別標籤（Active 根據上述之預防手持電子裝 之電子標籤發射第三射頻訊號之步驟其中上述 續發射第三射頻訊號至手持電子壯’罟已括电子標籤主動連 置連續接收此第三射頻訊號，或纽手持電子裝 時間發射第三射頻訊號，而由=子彳錢母間隔此預定 定時間連續接收此第三射頻訊號。、電子裝置每間隔此預 根據上狀預防铸f子裝 之預定時間可由使用者自行設定，較其中上述 秒之間，更佳為介於1秒至5秒之間。為，I於1秒至10 根據上述之舰手持f子裝置 之發出警告訊息之方法包括發出警告聲音。…其中上述 根據上述之預防手持電子裝 之第三射頻訊號係為頻率包人、/ ，其中上述 的電磁波訊號。 ；1 ; KHz至2.5GHz之間 本發明之預防手持電子穿 標籤來偵測手持電子裝置是否;因利用電子 已賴使用者的身邊以警示 200809703 IAC060089.TW 2ll31twf.doc/e 使用者手持電子裝置遺失或被竊。因此，本發明可幫助使 用者預防手持電子裝置遺失或是被竊。 為省本舍明之上述及其他目的、特徵及優點能更明顯 明^下了文特舉多個實施例’並配合所附圖式，作詳細說 【實施方式】 箱助使时肋讀電子裝㈣失，本發明提供 一種預防手持電子裝置遺失的 乃杈七、 例’配合圖1〜圖3進行詳細之說:以下將以較佳實施 一實施你i 圖1是本發明一實施例之 法流程圖，而目2是實施圖！之 寺電子裝置遺失的方 示意圖。請同時參閱圖丨以及圖2防手，電子裝置遺失的 於一手持電子裝置10，而手持電壯本實施例之方法適用 個人數位助理（PDA)、數位：裝置丨〇可以是手機、 隨身聽等。圖2所示的手持電子穿“、、數位攝影機或MP3 舉例說明，並非用以限定本發明=置10為手機，然其僅為 本實施例之預防遺失手:電子 括下列步驟：首先，手持 電子d10的警示方法包 至一電子標籤20 (S100)。其中，兩1射一弟一射頻訊銳 率包括介於125KHz至2.5GHz<f包子標籤2〇的操作頻 頻（125〜135KHz )、高頻$而其中更可細分為低 (100〜960MHz)及微波（2.45Gii ’5fMHz )、極高賴 子裝置10所發射出之第一射頻 等頻率範圍。手持電 柄虎必須與電子標籤2〇: 200809703 IAC060089.TW 2113 ltwf.doc/e 頻率相對應，具肀對於数位相機、數位攝影機以及Mp3 隨身聽等沒有通訊功能的手持電子裝置而言，需要加賣 取機（Reader)才有能力發射足夠功率的第一射頻$號與 電子標籤20相作用，而對於手機以及個人數位助理等具^有 通訊功能的手持電子裝置而言’由於本身就具有發出無線 黾波七號的月b力，因此可以直接透過發射無線電波訊號而 與電子標籤20相作用。舉例來說，一般全球移動通訊系統 (Global System of Mobile communication，Gsm)的 ^頻 手機，其操作頻率包括900MHz、1800MHz及 而其中900MHz的頻率範圍即落在上述極 ⑽〜960MHz)之電子標籤2G的操作範圍之内，因此2 需額外裝設例如讀取機之無線電發射器。 …、 電子標籤20接收第一射頻訊號後 訊號（SU0)。當手持電子裝置1Q發射第二 電子標籤20之後，電子標籤2 第一射= 號。具體而言，電子標籍' 2〇心”浅乂出弟一射頻訊 籤，而此電子標籤2(^在^^=_式射頻識別標 减庫的方4 4 π曰在接收射頻訊號時，利用電磁 (s= 接收從電子標藏2°發射之第⑽^ 帝關於發射第一射頻訊號至電子 兒子裝置10可以連續 / ，手持 以使電子㈣m ! 射頻訊號至電子標籤扣， 接收此第二射頻‘，遠=射第二射頻訊號，而能夠藉由 m相地雜手持電子1置κ)及電子 200809703 IAC060089.TW 21131 twf.doc/e 標戴20之間的机息傳遞是否中|||$ 置1〇也可以每間隔-預定時中間Hr方面’手持電子襄 標籤20，而此預定時間可由使二—射頻訊號至電子 i秒至Κ)秒之間，更佳為介=;者，較佳為介於 省發射第一射頻訊號所耗損的電’而f夠節 電子裝置K)每隔5秒發出第_：^§舉例而吕，假如手持 接收此第-射頻訊號後，才合發^^。當電子標籤20 在正常的情況下，手持電子裝5置 ====== 二:=訊1=此亦可監控手持電子裝置10二及電 子才不臧20之間的δίΐ息傳遞是否中斷。 拉+fi收電子標藏20發射之第二射頻訊號的同時，手 置二也Ϊ判斷所接收之第二射頻訊號是否中斷 編）。，、體而吕’當手持電子裝置持續發出第-^員訊號時，應當會持續接收到來自電子標藏2〇所回傳之 ;:= 乂然而’一旦手持電子裝置10沒有接收到此 昂-^頻^翁，則可判斷此第二射頻訊號的接收中斷。 波4於::::員訊號及第二射頻訊號都是-種無線電 離越來越、電子裝置10以及電子標鐵20之間的距 42二:到的訊號強度也越來越弱，而當此距 離時，手持或弟二射頻訊,者之最遠的傳播距 時即可判斷1 ^ 10即無法接收得到第二射頻訊號，此 」弟二射頻訊號的接收中斷。 置1(^^^第二射頻訊號的接收中斷時，手持電子裝 即會發出一則警告訊息（S140)。具體言之，發出 10 200809703 IAC060089.TW 2113 ltwf.doc/e 警告訊，之方法包括發出警告聲音，例如手持電子裝置⑺ 發出音置很大的特定手機鈴聲或警告語音，此手機龄 警告語音可為内建於手持電子裝置1Q中或由使自 訂，以提醒·者手持電子I置1Q已不在 : 電子裝置10遺失或遭竊。 t兄于待 第二f施例 方法本!實施例之預防手持電子襄置遺失的 方法抓耘圖。㈣同時參閱圖2以及圖3,本 的手持電子裝置及電子' 吏用 此以下仞以m 7达才 與圖所勺大體相同，因 圖為例，並且配合圖3，對第-墙^彳丨、 詳細之說明。 ]乐一只施例進行 署m材方t例之方法包括下列步驟：首先，由手持帝早壯 妾收電子標籤2Q主動發射之第三射 、二衣 其中，本實施例的電子標籤2G可以是—種主j s_。 :藏’而會主動地發射出第-射頻訊號給手 提供的電能，主動笋射塗二 电，而肐夠藉由電池所 據功率或頻率的不號，所以其偵剛範圍根 式射頻識別標籤的操作 :尺以上。此外，主動 故在此不縣述。科财動切賴觸錢相同， 此外，上述之電子 可以是採用連續發射或是的方式 負疋日守間發射，其相關 200809703 IAC060089.TW 21131twf.d〇c/e 技術内容與前述實施例相同，故在此不 -不同？是，此第三射頻訊號的是 J 而，唯 射，而非由手持電子裝置1〇發出。 爪截20主動發 下二步則是在接收第三射頻 之弟三射頻訊號是否中斷⑽〇)。盆中二，所接收 相同的是，此第三射頻訊號也是 ^ —實施例 當手持電子裝置10以及帝 …·泉电波訊號，因此 射頻訊號之傳播距離時，;二之:的， 到第三射賴號會目為無法接收 署上上當第三射頻訊號的接收中斷時，手持㊉早壯 ί ω即會發出-則警告訊息（S22〇)。具雕 ^告訊息之方法包括發出警告聲音，例如手G 出 發出音量很大的特定手機鈴聲 / :二置10 :替告:音可為内建於手持電繼； 失C用者手持電子裝置10已不再身邊，避免其遺 領τί述Ϊ提及’在第一實施以及第二實施例中，第—射 射頻訊號皆為一種電磁波訊 達到至2骗之間。為了 摆 、包衣置10运失或遭竊的最佳功效，可以選 :用=頻率介於125ΚΗΖ到細ΚΗΖ之間的被動^ τ戴’此種電子標籤的通訊距離最遠僅可達到5〇 二:此’只要當手持電子裝置10及電子標籤20之間 超過5Q公分時，手持電子裝置1G即會發出警告訊 200809703 IAC060089.TW 2113 ltwf.doc/e 心’而達到有效防止手持電子裝置1〇遺失或遭竊之功用。 根據本發明之預防手持電子裝置遺失的方法，其 子標籤2〇的外型有很多種，除了圖2所示的卡片型之 標鐵20之外，電子標籤2Q也可以是貼紙型的電子標鐵， 以貼在使用者隨身攜帶的物品上，例如手錶、眼鏡、戒指、 皮夾、隨身碟、錄匙圈等；或者，也可利用電子標藏2〇 直接做成物品，例如項鍊、手環、隨身碟、錄匙圈等。 根據本發明之預防手持電子裝置遺失的方法，手持電 子裝置10包括手機、智_手機(Smart Ph_)、個人數位 助理（Personal Digital Assistant，PDA)、數位相機、數 位攝影機、MP3 隨身聽（Mpeg audi〇 layer 3 piayer，Mp3After that, ^1 test - f sub-label. Electronic tag reception - RF π RF i: Γ, RF,. Then, the handheld electronic device receives whether the second RF signal received by the second b when the second shot is interrupted. The electronic 彳"^!^ is called, 'issue immediately--the warning message, and the Tag). Passive RFID tag (the method of the sub-device of Passive RFID), wherein after the RF_二?:! RF signal, the second sub-label is sent to the electronic device to emit the first RF signal to the electronic device.襟 ί ί ί ί ί ί ί ί ί ί ί ί ί ί ί ί ί ί ί ί ί ί ί ί ί ί ί ί ί ί ί ί ί ί ί ί ί ί ί ί ί ί ί ί ί ί ί ί ί ί ί Lost method, in which the setting is between 1 second and 10 seconds, depending on between 1 second and 5 seconds. The 4th swim: the method of losing the handheld electronic device, the above The method of voicing the heart includes issuing a warning sound. According to the above method for preventing the loss of the handheld electronic device, the RF signal of the 200809703 IAC060089.TW 21131twf.doc/e and the second shot box of 125KHZ to 2.5GHz are used. Between the electromagnetics and the frequency includes a precaution method according to the present invention. The method includes a third radio frequency signal that is lost by the electronic device. Next, the Hungarian=good tag is actively interrupted. In the third RF signal, the third RF signal message is received by the money, and the above electronic tag includes the owner immediately issuing a warning RFID tag. The type of radio frequency identification tag (Active is based on the above-mentioned electronic tag of the handheld electronic device. The steps of the RF signal, wherein the third RF signal is continuously transmitted to the handheld electronic device, and the electronic tag is continuously connected to receive the third RF signal continuously, or the new handheld electronic device is used to transmit the third RF signal, and The money carrier continuously receives the third RF signal at intervals of the predetermined time. The predetermined time for the electronic device to be pre-prepared according to the upper shape can be set by the user, which is better than the above second. Between 1 second and 5 seconds. For example, the method of issuing a warning message according to the above-mentioned ship holding f sub-device includes issuing a warning sound.... wherein the third radio frequency of the handheld electronic device according to the above prevention is The signal is a frequency envelope, /, wherein the above electromagnetic wave signal; 1; KHz to 2.5 GHz between the invention of the handheld electronic tag wear prevention Detecting whether the handheld electronic device is used; the use of the electronic device relies on the user's side to warn that the user's handheld electronic device is lost or stolen. Therefore, the present invention can help the user to prevent the loss of the handheld electronic device. The above and other objects, features and advantages of the present invention will be apparent from the following description. The present invention provides a method for preventing the loss of a hand-held electronic device. The following is a detailed description of the following: FIG. 1 to FIG. 3: The flow chart of one embodiment, and the second is the implementation diagram! The schematic diagram of the lost electronic device of the temple. Please refer to FIG. 2 and FIG. 2 for the anti-hand, the electronic device is lost in a handheld electronic device 10, and the method of the handheld embodiment is applicable to a personal digital assistant (PDA), a digital device, a mobile phone, a walkman. Wait. The handheld electronic device shown in FIG. 2 is exemplified by the "," digital camera or the MP3, and is not intended to limit the present invention. The mobile phone is only a mobile phone. However, it is only the prevention of the lost hand of the present embodiment: the electronic steps include the following steps: First, hand-held The warning method of the electronic d10 is packaged into an electronic tag 20 (S100), wherein the two-in-one-one-one-one-radio-acceptance rate includes an operation frequency (125 to 135 KHz) of between 125 kHz and 2.5 GHz. The frequency can be subdivided into low (100~960MHz) and microwave (2.45Gii '5fMHz), and the first RF range emitted by the extremely high-power device 10. The handheld electric handle must be associated with the electronic tag 2: 200809703 IAC060089.TW 2113 ltwf.doc/e Corresponding frequency, for handheld electronic devices such as digital cameras, digital cameras and Mp3 players that do not have communication functions, it is necessary to add a Reader to be able to transmit enough. The first RF number of the power interacts with the electronic tag 20, and for a mobile electronic device such as a mobile phone and a personal digital assistant, it has a month of sending wireless chopping VII. b force, so it can directly interact with the electronic tag 20 by transmitting radio wave signals. For example, the Global System of Mobile communication (Gsm) mobile phone operating frequency includes 900MHz, 1800MHz and Wherein, the frequency range of 900 MHz falls within the operating range of the electronic tag 2G of the above-mentioned pole (10) to 960 MHz), so 2 needs to additionally install a radio transmitter such as a reader. ..., the electronic tag 20 receives the first RF signal After the handheld electronic device 1Q emits the second electronic tag 20, the electronic tag 2 first shot = number. Specifically, the electronic standard '2〇心' is a radio frequency sign, and This electronic tag 2 (^ is in the ^^=_ type radio frequency identification tag minus the bank 4 4 π 曰 when receiving the RF signal, using electromagnetic (s = receiving from the electronic standard 2 ° emission of the (10) ^ Emperor about the launch An RF signal to the electronic son device 10 can be continuously/held to enable the electronic (four) m ! RF signal to the electronic tag buckle to receive the second RF ', far = the second RF signal, and can be m-phased Holding electronic 1 set κ) and electronic 200809703 IAC060089.TW 21131 twf.doc/e Whether the transmission of the signal between 20 is in the middle |||$ 1 can also be used every interval - the middle of the Hr in the 'handheld electronic 预定The label 20, and the predetermined time can be between the two-radio signal to the electronic i seconds to Κ) seconds, more preferably, the power consumption of the first RF signal is saved in the province. The enough electronic device K) sends the _:^§ example every 5 seconds, and if the handheld receives the first-RF signal, it will send the ^^. When the electronic tag 20 is in a normal situation, the handheld electronic device 5 is set to ====== 2: = 1 = This can also monitor whether the transmission of the δ ΐ ΐ 手持 between the handheld electronic device 10 and the electronic device 20 is interrupted. . Pulling +fi receives the second RF signal transmitted by the electronic tag 20, and the second device determines whether the received second RF signal is interrupted or not. When the handheld electronic device continues to issue the first-in-one signal, it should continue to receive the return from the electronic standard 2:; = ' However, once the handheld electronic device 10 does not receive this -^ 频^, can determine the reception interruption of the second RF signal. Wave 4:::: The signal of the member and the second RF signal are all the distance between the radio, the electronic device 10 and the electronic standard 20, and the signal strength is getting weaker and weaker. At this distance, the handheld or the second RF signal, the farthest propagation distance of the user can judge that 1 ^ 10 can not receive the second RF signal, and the reception of the second RF signal is interrupted. Set 1 (^^^ When the reception of the second RF signal is interrupted, the handheld electronic device will issue a warning message (S140). Specifically, issue 10 200809703 IAC060089.TW 2113 ltwf.doc/e warning, including A warning sound is issued, for example, the handheld electronic device (7) emits a specific mobile phone ringing or warning voice that is very loud, and the mobile phone age warning voice can be built into the handheld electronic device 1Q or customized to remind the person to hold the electronic I Set 1Q is no longer: The electronic device 10 is lost or stolen. The brothers are waiting for the second f example method. The method for preventing the loss of the handheld electronic device is captured. (4) See also Figure 2 and Figure 3, Handheld electronic devices and electronics ' 吏 此 仞 仞 m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m The method for carrying out the example of the method includes the following steps: Firstly, the third shot and the second garment which are actively emitted by the hand-held Emperor Qiangzhuang electronic tag 2Q, wherein the electronic tag 2G of the embodiment can be a master j s_. :藏' and will actively send The power supplied by the first-RF signal to the hand, the active shooter is coated with two electric power, and the power of the battery is based on the power or frequency of the battery, so the operation of the root-type radio frequency identification tag is detected: more than a ruler. The initiative is not described here. The financial operation is the same as the touch of money. In addition, the above-mentioned electrons may be transmitted in a continuous transmission or in the same way as the day-to-day transmission, and its related 200809703 IAC060089.TW 21131twf.d〇c/ e The technical content is the same as the previous embodiment, so it is not different here. The third RF signal is J, but not emitted by the handheld electronic device 1. The claw cut 20 takes two steps. Is the third RF signal received by the third radio frequency interrupt (10) 〇). In the basin 2, the same is received, the third RF signal is also the same as the embodiment when the handheld electronic device 10 and the emperor ... the radio wave signal, so the propagation distance of the radio frequency signal, the second:, to the third When the slamming number is unable to receive the reception interruption of the third RF signal on the Department, the warning message (S22〇) will be issued when the hand is ten strong. The method of arranging the message includes issuing a warning sound, for example, the hand G emits a specific ringtone of a large volume of the phone / : 2 set 10 : for the note: the sound can be built in the hand-held power; 10 is no longer around, avoiding its legacy. In the first implementation and the second embodiment, the first-radio RF signal is between an electromagnetic wave and a scam. In order to put the best effect on the 10 lost or stolen clothes, you can choose: use the passive frequency of the frequency range between 125ΚΗΖ and fine. The communication distance of the electronic tag can only reach 5. 〇二: This 'as long as the handheld electronic device 10 and the electronic tag 20 between more than 5Q centimeters, the handheld electronic device 1G will issue a warning message 200809703 IAC060089.TW 2113 ltwf.doc / e heart' to achieve effective prevention of handheld electronic devices 1〇 Loss or theft. According to the method for preventing the loss of the handheld electronic device of the present invention, the sub-label 2 has a plurality of appearances. In addition to the card-type standard iron 20 shown in FIG. 2, the electronic tag 2Q can also be a sticker-type electronic standard. Iron, to stick to the items that the user carries with them, such as watches, glasses, rings, wallets, flash drives, key rings, etc.; or, you can use electronic labels to make items directly, such as necklaces and hands. Ring, flash drive, key ring, etc. According to the method for preventing loss of a handheld electronic device according to the present invention, the handheld electronic device 10 includes a mobile phone, a smart phone (Smart Ph_), a personal digital assistant (PDA), a digital camera, a digital camera, and an MP3 player (Mpeg audi). 〇layer 3 piayer, Mp3
Player )、RFID讀取機（Radi〇丹叫職巧魅 Reader)等。 綜上所述，本發明利用電子標籤以及手持電子裝置之 間射頻訊號的傳遞，偵測手持電子裝置是否移動，使得手 持電子裝置在離開使用者的身邊時，即藉由發詩告訊息 以告知使用者手持電子裝置目前不在身邊，進而預防手持 電子裝置遭竊或是遺失，以避免造成使用者重大的損失。 —雖然本發明已以多個實施例減如上，然其並非用以 限疋本發明，任何熟習本發明所屬領域之具有通常知識 者’在不脫離本發明之精神及範圍内，當可作些許之更動 及潤飾口此本發明之保護範圍當視後附之申請專利範圍 13 200809703 IAC060089.TW 2ll31twf.doc/e 【圖式間早說明】 圖！是本發明-實施例之預防手持電子裝置遺失的方 法流程圖。 圖2是實施圖！之預防手持電子裝置遺失的示意圖。 圖3是本發明第二實施例之預防手持電子裝置遺失的 方法流程圖。 【主要元件符號說明】 10 :手持電子裝置 20 :電子標籤 S100 ··發射一第一射頻訊號至一電子標藏 S110 ·電子標籤接收第一訊號之後，發射一二射頻 訊號 =從電子標_之一第二射頻訊號 ··=，所接收之第二射頻訊號是否中斷 S140 ·當第二射頻訊號的接收中斷時，發出一則警告 摆收電子標籤主動發射之一 •射頻訊號 S210 ··判斷所扯丨二♦ 不―考ί頻- S22(n -接收之弟三射頻訊號是否中斷 田 射頻訊號的接收中斷時，蝥出一則警告 14Player), RFID reader (Radi 〇丹叫巧巧魅 Reader) and so on. In summary, the present invention utilizes the transmission of RF signals between the electronic tag and the handheld electronic device to detect whether the handheld electronic device is moved, so that the handheld electronic device is notified by sending a message when leaving the user. The user's handheld electronic device is currently not around, thereby preventing the handheld electronic device from being stolen or lost, so as to avoid causing significant loss to the user. The present invention has been described as a plurality of embodiments, which are not intended to limit the invention, and those skilled in the art to which the invention pertains will be able to make a few modifications without departing from the spirit and scope of the invention. The scope of protection of the present invention is as follows: Patent Application No. 13 200809703 IAC060089.TW 2ll31twf.doc/e [Ease between the drawings] Figure! It is a flow chart of a method for preventing loss of a handheld electronic device of the present invention. Figure 2 is an implementation diagram! A schematic diagram of preventing the loss of a handheld electronic device. 3 is a flow chart of a method for preventing loss of a handheld electronic device in accordance with a second embodiment of the present invention. [Main component symbol description] 10: Handheld electronic device 20: Electronic tag S100 · · Transmit a first RF signal to an electronic standard S110 · After receiving the first signal, the electronic tag transmits one or two RF signals = from the electronic standard A second RF signal··=, whether the received second RF signal is interrupted S140. When the reception of the second RF signal is interrupted, a warning is sent to the electronic tag to actively transmit one of the RF tags S210.丨二♦ No-testing frequency-S22(n-receiving the third RF signal is interrupted when the receiving of the RF signal is interrupted, a warning is issued 14