201042885 六、發明說明： 【發明所屬之技術領域】 - 本發明涉及一種充電狀態指示電路及應用該電路之可 攜式電子裝置，尤其涉及一種節約成本之充電指示電路及 -應用該電路之可攜式電子裝置。 - 【先前技術】 目月丨』’手機、PDA(Personal Digital Assistant，個人數 〇位助理）等可攜式電子產品以其小巧、便於隨身攜帶等顯著 特點而倍受現代人之歡迎，並顯著地提高了人們之工作效 率和生活品質。該可攜式電子產品廣泛使用充電電池。於 應用中，當電池之電量不足時，可藉由一充電裝置連接到 其他電源上進行充電後即可再次使用。 一般可攜式電子裝置上都設置有指示《電裝置工作狀 態之指示燈，於對裝設於可攜式電子裝置上之充電電池進 行充電時，該指示燈可以藉由顯示不同之顏色或明亮程度 〇而指=該充電電池之充電狀態。現有之電子裝置一般係藉 由ϋ輯電路、專用之集成晶片等組成控制電路來控制指示 -燈之導通狀態，此類控制電路不但因電路元件多，結構複 雜而可月b不利於可攜式電子裝置之小型化，而且會增加整 體之製造成本。此外，當該可攜式電子裝置長時間未使用 或放置時間過久，可能會造成該電子裝置之充電電池因過 放電而使得電池電壓低於該電子裝置電路系統之啟動電 屢以至於於充電初期因電池電遷過低而無法啟動系統， 此時，該可攜式電子裝置上之指示燈將處於媳滅狀態，可 4 201042885 能會讓人們誤認為該可攜式電子裝置損壞或電池無法充 .電，從而造成不必要之麻煩。 【發明内容】 有鑒於此，有必要提供一種結構簡單，成本低廉且應用方便之充 - 電指示電路。 ' 另，有必要提供一種應用該充電指示電路之可攜式電子裝置。 . 一種充電指示電路，其包括依次電性連接之一充電控制單元、一 〇充電指示單兀及與充電控制單元電性連接之一電池單元、一微處理器 單元。所述充電指示單元用於指示該電池單元地充電狀態，該充電控 制單元包括一與上述充電指示單元電性連接之電晶體Q2，當電池單元 之電壓大於或等於一可攜式電子裝置之啟動電壓時，該微處理器單元 控制該電晶體Q2之導通或斷開’從而控繼充電指示單元處於不同 之狀態’以指示上述充電單元之充電狀態。 -種可攜式電子n其包括—紐及設於該殼㈣之充電指示 電路，所述充電指示電路包括一電源輸入單元和依次電性連接之一充 〇電控鮮7G、-充電指示單元及與充電控鮮元電性連接之一電池單 -元、-微處理器單元。該電源輸入單元設於殼體内，藉由該殼體接入 --充電賴以提供電能，所述充電指示單元用於指示該電池單元之充 電狀態’該充電控鮮元包括—與上述充電指示單元電性連接之電晶 體Q2,當電池單元之電壓大於或等於上述可攜式電子裝置之啟動電麼 時，該微處理器單元控制該電晶體〇2之導通或斷開，從而控制該充 電指示單元處於不同之狀態，以指示上述充電單元之充電狀態。 相較於習知技術，本發明較佳實施例之充電指示電路藉由所述充 電控制單元和微處理H單元控騎述充電心單元，使該充電指示單 5 201042885 兀顯不電池單元之充電狀態。此外，當電池單元處於過放狀態時，藉 由該充電指示單元仍能判斷該充電單元係否處於充電狀態。所述充電 指示電路之電路元件較少，電路結構簡單，藉由控制電晶體Q2之導 通或斷開即可控繼充職示單元，成本較低，使用亦更加方便。 -【實施方式】 ' 請參閱圖1及圖3 ’本發明之-個較佳實施例提供-種充電指示 -電路細’其適用於一可攜式電子裝置200中，該可攜式電子裝置200 〇可以，行動電話、PDA、MP3等。所述充電指示電路1〇〇包括一電源 輸入單to 1G、-渡波單元2Q、_保護單元3()、—充電控制單元、 -微，理H單元5G、—充示單元⑻及—電池單元％。所述電源 輸^單7° 1〇、遽波單元2〇、賴單元30、充電控制單元40、充電指 示單Y „依人電陡連接’該保護單元30同時與微處理器單元50、充 電心不單Γ 6〇和電池單兀7〇電性連接，所述微處理器單元50同時與 充電控制單元40雜連接爾可攜式電子裝置具有―崎體卻、 所=源輸人單元1G、驗單元2Q、保鮮元％、充單 〇微處理器單元50及電池單元7〇均可裝設於該殼體卻内。早讀 -現有^述電輯人單元1G可為财之轉埠，其與 置。所述滤波單元2〇包括與所述電·單元意位 ’所述電源輸人單元1G之電流經 ς c :=纖，她，峨帽^輪= 所述保護單元30包括二極體m、Μ、加和以，該二極㈣卜 6 201042885 D2 D3和D4可為現有之肖特基二極體（sch〇ttky Barrier Diode )，其 -組成-保護電路，以防止上述電流輸入單元1〇輸出之電流倒灌而影響 電池單元70和損壞微處理器單元50之引腳。 所述充電控制單元40包括電阻R1、R2和R3及電晶體Q1和Q2, •所述電阻R1為分壓電阻’其一端連接保險絲F和二極體D2之正(N) 極之間’其另-端連接二極體D3之正極和電晶體之漏極D(Drain) .之間。所述電阻R2為下拉電阻，其連接於電晶體Q1之細^ G(G㈣ 〇和源極S(S〇職)之間。所述電阻R3為分壓電阻，其連接於電晶體q2 之，極G和源極S之@，所述電晶體Q2之漏極D電性連接於充電指 不單元60，該電晶體Q2之栅極G同時電性連接至二極體D3、〇4之 負（P)極。所述電晶體Q1和Q2可為現有之 NMOS(N-Metal-〇xide-SemicondUct〇r ’ N-金屬氧化物半導體)管，當上 述電源輸入單元10接入-充電電壓％時，該電晶體Q2拇極〇和源 極 S 之間之電壓 Vgs2=Vc*R3/(Rl+R3；)。 所述微處理器單元50可與所述可攜式電子裝置2〇〇之微控制單元 〇 (MiCIOCon_erU吡MCU)等裝置整合，其具有可編程邏輯功能，内 .部具有相應之控制程式。該微處理器單元50具有一第一訊號輸出引腳 -(GPI〇l)52及一第二訊號輸出引腳(GPI〇2)54，該第一訊號輸出引腳52 連接於一極體D4之正極，第三訊f嫌㈣腳54連接於電晶體Q1之 拇極G和電阻R2之間。該第-訊號輪出引腳％和第二訊號輸出引腳 54為二通用輸出埠，其可藉由微處理器單元5〇内部程式配置為高/低 電平來控制外部設備。 所述充龍示單元6G包括-發光二極體(Light Emitting DiQde， LED)D5及一與5亥發光一極體D5負極連接之電阻R4，該電阻R4之另 7 201042885 ^ 性連接於電晶體Q2之漏極D，該電阻R4可為一現有 -阻，其用於調節發光-炻.見有之Tt：電 .連接於二極體m 。該發光二極體D5之正極電性 _ 1)2之負極，流經二極體D1、D2之正向雷户古 便解’該發光二極體可™ 絲Μ早70 7G充電狀態之任意位置。 '之正可為現有鐘電池等可充電電池，其與二極體D1 .200電路祕^ ^電轉元％之·大於所述可攜式電子裝置 〇電能支援。、、預狀啟動電壓時’其啟動該電子I置200並提供 可攜2及圖3 ’當使用所述充電指示電路100指示上述 電池料％之就_，下面描述該充電指 不電=100於不同之工作狀態下之具體工作情況。 、虽上述電輯人單元1G沒有接人充電電源時。此時，充電電壓 =為〇 ’歸述電池單元7G處於過放狀態或耗盡狀態，該可攜式電 子哀置200之電路系統不能啟動，所述發光二極體d 〇由’故其呈現域滅狀態。 # . 冑上述電源輸人單元1G接人充電賴、，且電池單元7〇之電壓仍 丨於上述可攜式電子裝置2〇〇之電路系統之啟動電壓時。此時，所述 電晶體Q1之柵極G和源極s之間之電壓Vgsl為〇，無法導通該電晶 體Q1 ’使該電晶體Q1處於截止狀態。而所述電晶體⑴之柵極g和 源極s之間之電壓Vgs2=Vc*R3/(R1+R3)，由於分壓電阻R3之分壓作 用’ Vgs2即可達到電晶體〇2之開啟電壓VT2而使該電晶體Q2處於 導通狀態，此時電流經由保險絲F、二極體D2、發光二極體D5、電 阻R4和Q2之D及S形成通路，從而點亮發光二極體！)5，並使其處 8 201042885 於發光狀態。於此充電過程中’該發光二極體D5受到充電電壓Vct -控制，並使該發光二極體D5 —直處於發光狀態。 • 當上述電源輸入單元1〇接入充電電源，且電池單元70之電壓大 於或專於可攜式電子裝置2〇〇之電路系統之啟動電壓時。此時，所述 -可攜式電子裝置200之電路系統啟動，電晶體Q2和發光二極體D5受 ，到微處理器單元50之控制。所述微處理器單元5〇之第二訊號輸出引 腳54向電晶體(^之栅極G輸出一高電平，使電晶體qi導通，由於 ❹電晶體Q1之源極S接地，則電晶體以之漏極d電壓vd與電晶體 Q1之源極S電壓Vs均為〇,二極體D3兩端和電晶體Q2之柵極G電 壓亦均為0’由於電晶體q2沒有外部偏置電壓，該電晶體Q2處於斷 開狀態。同時，微處理器單元5〇之第一訊號輸出引腳52藉由二極體 D4向電晶體Q2之栅極G輸出一高電平，電晶體〇2之柵極〇和源極 s之間之電壓Vgs2大於電晶體Q2之導通電壓W2，故該電晶體Q2 受到微處理H單元50之控制而處於導通錢。則由電池單元7〇提供 之電流經由二極體D1、發光二極體D5和電阻R4形成通路，從而點 〇冗發光一極體D5，並使其處於發光狀態。於此充電過程中，該發光二 極體D5受到微處理器單元5〇之控制，藉由保持導通電晶體，使 -該發光二極體D5 —直處於發光狀態。 當上述電源輸入單元1〇接入充電電源，且所述電池單元％滿充 時，則上述微處理器單元5〇檢測到該電池單元7〇輸出之一表示已經 充滿電量之邏輯訊號，該微處理器單元50依據該邏輯訊號控制其第一 訊號輸出引腳52藉由二極體D4向電晶體Q2之桃極G輪出一低電 平’該電晶體Q2受到微處理器單元5〇之控制而處於斷開狀態。上述 發光二極體D5沒有電流經過，其處於賊狀態。 9 201042885 本發明較佳實施例之充電指示電路勘藉由所述充電控制單元4〇 .和微處理器單元50控制所述充電指示單元6〇，使該充電指示單元6〇 •顯示電池單元7〇之充電狀態。此外，當電池單元％處於過放狀態時， 藉由該充電指示單元6〇仍能判斷該充電單元7〇係否處於充電㈣。 .所述充電指示電路100結構簡單，藉由控制電晶體Q2之導通或^ 即可控制該充電指示單元60，成本較低，滿足了人們之消費需要。 、，综上所述，本發明符合發明專利要件，爰依法提出專利申請。惟， ο以上所it者僅為本發明之實施方式，本發明之細並似上述實施方 式為限，舉凡熟悉本案技藝之人士，於援依本案發明精神所作之等效 修飾或變化，皆應包含於以下之申請專利範圍内。 【圖式簡單說明】 圖1為本發明較佳實施例之充電指示電路之電源輸入單元及發光 二極體裝設於可攜式電子裝置中之位置示意圖。 圖2為本發明較佳實施例之充電指示電路之功能單元框圖。 圖3為為本發明較佳實施例之充電指示電路之電路原理 〇 【主要元件符號說明】201042885 VI. Description of the Invention: [Technical Field] The present invention relates to a charging state indicating circuit and a portable electronic device using the same, and more particularly to a cost-saving charging indicating circuit and a portable device using the same Electronic device. - [Prior Art] Portable electronic products such as mobile phones and PDAs (Personal Digital Assistants) are popular among modern people for their distinctive features such as small size and easy portability. The land has improved people's work efficiency and quality of life. The portable electronic product widely uses a rechargeable battery. In the application, when the battery is low, it can be re-used by being connected to another power source by a charging device. Generally, the portable electronic device is provided with an indicator light indicating the working state of the electric device. When the rechargeable battery installed on the portable electronic device is charged, the indicator light can be displayed by using different colors or bright colors. The degree refers to the state of charge of the rechargeable battery. The existing electronic devices generally control the conduction state of the indicator light by using a circuit composed of a circuit, a dedicated integrated chip, etc., such a control circuit is not only disadvantageous to the portable type due to the large number of circuit components and complicated structure. The miniaturization of electronic devices increases the overall manufacturing cost. In addition, when the portable electronic device is not used for a long time or is left for a long time, the rechargeable battery of the electronic device may be over-discharged, so that the battery voltage is lower than the startup of the electronic device circuit system. In the initial stage, the battery cannot be activated because the battery is too low. At this time, the indicator light on the portable electronic device will be in an annihilation state. 4 201042885 can make people mistakenly believe that the portable electronic device is damaged or the battery cannot be used. Charge and electricity, causing unnecessary trouble. SUMMARY OF THE INVENTION In view of the above, it is necessary to provide a charging indicating circuit which is simple in structure, low in cost, and convenient in application. In addition, it is necessary to provide a portable electronic device to which the charging indicating circuit is applied. A charging indicating circuit includes a charging control unit electrically connected in sequence, a charging indication unit, and a battery unit electrically connected to the charging control unit, and a microprocessor unit. The charging indicating unit is configured to indicate a charging state of the battery unit, and the charging control unit comprises a transistor Q2 electrically connected to the charging indicating unit, when the voltage of the battery unit is greater than or equal to the activation of a portable electronic device At the time of voltage, the microprocessor unit controls the conduction or disconnection of the transistor Q2 to control the charging indicating unit to be in a different state to indicate the charging state of the charging unit. - a portable electronic device comprising a charging indicating circuit disposed on the casing (4), the charging indicating circuit comprising a power input unit and one of the electrical connections, the electric control 7G, the charging indicating unit And a battery single-element, - microprocessor unit electrically connected with the charging control unit. The power input unit is disposed in the casing, and the charging is provided by the casing to provide electric energy, and the charging indicating unit is configured to indicate a charging state of the battery unit. The transistor Q2 electrically connected to the indicator unit controls the on/off of the transistor 〇2 when the voltage of the battery unit is greater than or equal to the startup power of the portable electronic device, thereby controlling the The charging indicating unit is in a different state to indicate the charging state of the charging unit. Compared with the prior art, the charging indicating circuit of the preferred embodiment of the present invention controls the charging core unit by the charging control unit and the microprocessor H unit to cause the charging indicator 5 201042885 to display the charging of the battery unit. status. In addition, when the battery unit is in the over-discharge state, the charging indicating unit can still determine whether the charging unit is in a charging state. The charging indicating circuit has fewer circuit components and a simple circuit structure. The control unit can be controlled by controlling the conduction or disconnection of the transistor Q2, and the cost is lower and the use is more convenient. - [Embodiment] 'Please refer to FIG. 1 and FIG. 3 'The preferred embodiment of the present invention provides a charging indication-circuit thinness' which is applicable to a portable electronic device 200, the portable electronic device 200 〇, mobile phone, PDA, MP3, etc. The charging indicating circuit 1 includes a power input unit to 1G, a wave unit 2Q, a protection unit 3 (), a charging control unit, a micro, a H unit 5G, a charging unit (8), and a battery unit. %. The power supply unit 7° 1〇, the chopper unit 2〇, the sluice unit 30, the charging control unit 40, the charging instruction unit Y „ 依 依 该 该 该 该 该 该 该 该 该 该 该 该 该 该 该The battery unit 50 is electrically connected to the battery unit, and the microprocessor unit 50 is connected to the charging control unit 40 at the same time. The portable electronic device has a “sah body, a source unit 1G, The inspection unit 2Q, the preserving unit%, the charging unit microprocessor unit 50 and the battery unit 7〇 can be installed in the housing. The early reading-existing electric unit 1G can be a turning point. The filtering unit 2 includes the current of the power input unit 1G with the electric unit unit ς c := fiber, her, 峨 cap ^ wheel = the protection unit 30 includes two The polar body m, Μ, sum, and the two poles (four) 卜 6 201042885 D2 D3 and D4 may be the existing Schottky diode (sch〇ttky Barrier Diode), which constitutes a protection circuit to prevent the above current The current output of the input unit 1 倒 is inverted to affect the battery unit 70 and damage the pins of the microprocessor unit 50. The charging The control unit 40 includes resistors R1, R2 and R3 and transistors Q1 and Q2, and the resistor R1 is a voltage dividing resistor whose one end is connected between the fuse F and the positive (N) pole of the diode D2. Connect the positive electrode of the diode D3 and the drain D (Drain) of the transistor. The resistor R2 is a pull-down resistor connected to the thin film G of the transistor Q1 (G(four) 〇 and the source S (S 〇 The resistor R3 is a voltage dividing resistor connected to the transistor q2, the pole G and the source S, and the drain D of the transistor Q2 is electrically connected to the charging finger unit 60. The gate G of the transistor Q2 is electrically connected to the negative (P) poles of the diodes D3 and 〇4. The transistors Q1 and Q2 can be the existing NMOS (N-Metal-〇xide-SemicondUct〇r ' N-metal oxide semiconductor) tube, when the power input unit 10 is connected to the charging voltage %, the voltage between the thumb and the source S of the transistor Q2 is Vgs2=Vc*R3/(Rl+R3;) The microprocessor unit 50 can be integrated with a device such as a micro control unit (MiCIOCon_erU-MCU) of the portable electronic device, which has a programmable logic function, and the internal control unit has corresponding control. The microprocessor unit 50 has a first signal output pin-(GPI〇l) 52 and a second signal output pin (GPI〇2) 54. The first signal output pin 52 is connected to one pole. The positive electrode of the body D4, the third signal f (four) leg 54 is connected between the thumb G of the transistor Q1 and the resistor R2. The first signal output pin % and the second signal output pin 54 are two general-purpose outputs It can be controlled by the microprocessor unit 5 internal program to be high/low level to control the external device. The charging device 6G includes a light emitting diode (LED) D5 and a resistor R4 connected to a negative electrode of the fifth light emitting body D5, and the resistor R4 is connected to the transistor. The drain D of Q2, the resistor R4 can be an existing-resistance, which is used to adjust the luminescence - 炻. See Tt: electricity. Connected to the diode m. The negative electrode of the positive electrode of the light-emitting diode D5 _ 1) 2 flows through the positive electrode of the diode D1 and D2, and the solution of the light-emitting diode can be solved. position. 'It can be a rechargeable battery such as an existing clock battery, and the diode D1.200 circuit is more than the % of the portable electronic device. When the voltage is pre-started, 'it activates the electronic I set 200 and provides the portable 2 and FIG. 3 'When the charging indicating circuit 100 is used to indicate the above-mentioned battery material %, the charging finger is not described below. Specific work conditions under different working conditions. Although the above-mentioned electrician unit 1G does not receive a charging power supply. At this time, the charging voltage= is 〇' to state that the battery unit 7G is in an over-discharge state or a depleted state, the circuit system of the portable electronic mourning 200 cannot be activated, and the light-emitting diode d 〇 is presented by The domain is out of state. # . The power input unit 1G is connected to the charging device, and the voltage of the battery unit 7 is still below the starting voltage of the circuit system of the portable electronic device 2 . At this time, the voltage Vgs1 between the gate G and the source s of the transistor Q1 is 〇, and the transistor Q1 cannot be turned on to turn off the transistor Q1. The voltage Vgs2=Vc*R3/(R1+R3) between the gate g and the source s of the transistor (1) can be turned on by the voltage division function 'Vgs2' of the voltage dividing resistor R3. The voltage VT2 causes the transistor Q2 to be in a conducting state. At this time, the current forms a path through the fuse F, the diode D2, the light-emitting diode D5, the resistors R4 and Q2, D and S, thereby illuminating the light-emitting diode! ) 5, and make it at 8 201042885 in the light state. During the charging process, the light-emitting diode D5 is controlled by the charging voltage Vct-, and the light-emitting diode D5 is directly in the light-emitting state. • When the power input unit 1 is connected to the charging power source, and the voltage of the battery unit 70 is greater than or specific to the starting voltage of the circuit system of the portable electronic device 2 . At this time, the circuit system of the portable electronic device 200 is activated, and the transistor Q2 and the light-emitting diode D5 are controlled by the microprocessor unit 50. The second signal output pin 54 of the microprocessor unit 5 outputs a high level to the gate G of the transistor, so that the transistor qi is turned on. Since the source S of the germanium transistor Q1 is grounded, the battery is electrically The drain d voltage vd of the crystal and the source S voltage Vs of the transistor Q1 are both 〇, and the gate G voltage of both ends of the diode D3 and the transistor Q2 is also 0' due to the external bias of the transistor q2. Voltage, the transistor Q2 is in an off state. At the same time, the first signal output pin 52 of the microprocessor unit 5 outputs a high level to the gate G of the transistor Q2 via the diode D4, and the transistor 〇 The voltage Vgs2 between the gate 源 and the source s of 2 is greater than the turn-on voltage W2 of the transistor Q2, so the transistor Q2 is controlled by the microprocessor H unit 50 and is in conduction. The current supplied by the battery unit 〇 A path is formed through the diode D1, the light-emitting diode D5, and the resistor R4, so that the light-emitting body D5 is turned on and is in a light-emitting state. During the charging process, the light-emitting diode D5 is subjected to a microprocessor. The control of the unit 5〇, by keeping the conductive crystal, so that the light-emitting diode D5 is directly illuminated When the power input unit 1 is connected to the charging power source, and the battery unit is fully charged, the microprocessor unit 5 detects that one of the battery unit 7 outputs outputs a logic signal indicating that the battery is fully charged. The microprocessor unit 50 controls the first signal output pin 52 according to the logic signal to rotate a low level to the peach pole G of the transistor Q2 via the diode D4. The transistor Q2 is received by the microprocessor unit 5 The control is in an off state. The above-mentioned light-emitting diode D5 has no current passing, and is in a thief state. 9 201042885 The charging indicating circuit of the preferred embodiment of the present invention is obtained by the charging control unit 4 and the microprocessor. The unit 50 controls the charging indicating unit 6〇 to cause the charging indicating unit 6 to display the charging state of the battery unit 7. In addition, when the battery unit % is in the over-discharge state, the charging indicating unit 6 can still It is judged whether the charging unit 7 is in charge (4). The charging indicating circuit 100 has a simple structure, and the charging indicating unit 60 can be controlled by controlling the conduction or the transistor Q2, and the cost is low, satisfying In view of the above, the present invention is in accordance with the invention patent requirements, and the patent application is filed according to law. However, the above is only an embodiment of the present invention, and the present invention is similar to the above embodiment. The equivalent modifications and variations of the invention in the spirit of the invention are to be included in the following claims. FIG. 1 is a preferred embodiment of the present invention. FIG. 2 is a functional block diagram of a charging indicating circuit according to a preferred embodiment of the present invention. FIG. 3 is a schematic diagram of a power input unit of the charging indicating circuit and a position of the light emitting diode mounted in the portable electronic device. The circuit principle of the charging indicating circuit of the preferred embodiment of the invention 〇 [main component symbol description]
充電指示電路 100 滤波單元 20 充電控制單元 40 第一訊號輸出引腳 52 充電指示單元 60 殼體 80 電容 C 電源輸入單元 10 保護單元 30 微處理器單元 50 第二訊號輸出引腳 54 電池單元 70 可攜式電子裝置 200 二極體 D1-D4 201042885 發光二極體 D5 保險絲 F . 電阻 R1-R4 電晶體 Ql、Q2Charging indicating circuit 100 filtering unit 20 charging control unit 40 first signal output pin 52 charging indicating unit 60 housing 80 capacitor C power input unit 10 protection unit 30 microprocessor unit 50 second signal output pin 54 battery unit 70 Portable electronic device 200 diode D1-D4 201042885 LED diode D5 fuse F. Resistor R1-R4 transistor Ql, Q2
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