TWI242903B

TWI242903B - Photoflash capacitor charger and method thereof

Info

Publication number: TWI242903B
Application number: TW093135859A
Authority: TW
Inventors: Donald Cho Lam Yu
Original assignee: Yobon Technologies Inc
Priority date: 2004-11-22
Filing date: 2004-11-22
Publication date: 2005-11-01
Also published as: TW200618370A

Abstract

A method for charge control of a photoflash capacitor. The method includes generating an input current to induce a charge current for the photoflash capacitor when an activation signal is asserted, detecting a first voltage from the photoflash capacitor and a second voltage corresponding to the input current, asserting and de-asserting a recharge signal respectively when the first detected voltage is lower and higher than a first reference voltage, asserting and de-asserting a current limit signal respectively when the second detected voltage is higher and lower than a second reference voltage, asserting the activation signal only when the recharge signal is asserted and the current limit signal is de-asserted, and providing a pin for connection of a resistive element which determines the second reference voltage.

Description

12429031242903

【發明所屬之技術領域】本發明係有關於一種閃光燈種利用一個可調的充電電流、電路’特別是有關於一法及裝置。〗來對閃光燈電容充電的方【先前技術】利用閃光燈的照相機一般 — 的閃光燈電容充電的充電線路。』一個對附加在照相機中式儲存能量。胃能量在稍後會被;m,電容以電荷的方來產生閃光。光&在拍攝照片時利用一般而言，在一個有充雷雷池來提供某種程度的電壓給！有-個電 up transformer)作為充電線路的一日阿、欠壓^來（SteP 個大約3伏特的電壓（電池電壓）換=°該變壓器將一充電用的30 0伏特電壓，閃光㈣；. 的能量給一個觸發電路。此電路一邙八^\子在，、本身_ 壓給閃光燈（燈泡）使用到大約4_ :特= 光燈泡内氣體的離子化。當閃光燈被觸發日卜經由被離子化的閃光燈泡放電…產生非常大的^ 5亥電流在閃光燈泡中造成閃光。第1圖表示一個美國專利6, 5 1 8, 733號中揭露的閃光燈電容充電線路的方塊圖。一個電源傳送電路12〇作為從輸入源170轉換電源到閃光燈電容144(最好接上負載^之^用' 電源傳送電路120包括一個適應工作期間的線路（adapt ive ON-time circuit)130、一個適應不工作期間的線路[Technical field to which the invention belongs] The present invention relates to a flashlight, a method and a device using an adjustable charging current, circuit ', and more particularly. 〖How to charge the flash capacitor [Previous technology] Cameras using flash are generally-a charging circuit for charging the flash capacitor. A pair is stored in the camera to store energy. Stomach energy will be used later; m, the capacitance generates flashes of charge. Light & use in taking pictures Generally speaking, in a mine-charged thunder pool to provide some level of voltage to! There is an electric up transformer) as a charging circuit for one day, under voltage ^ come (SteP voltage of about 3 volts (battery voltage) == This transformer will charge 300 volts for charging, flash ㈣ ;. The energy is given to a trigger circuit. This circuit is 邙 ^^ sub, in itself, pressure is used for the flash (bulb) about 4_: special = the ionization of the gas in the light bulb. When the flash is triggered, the light is passed through the ion Discharge of the flash lamp ... Generates a very large current of ^ 5 Hai causing flash in the flash lamp. Figure 1 shows a block diagram of a flash capacitor charging circuit disclosed in US Patent No. 6, 5 1 8, 733. A power transmission The circuit 12 is used to convert the power from the input source 170 to the flash capacitor 144 (it is best to connect the load ^). The power transmission circuit 120 includes an adaptive ON-time circuit 130 and an adaptive non-operation circuit. Period of the line

0842-a40213twf(n2);victorcho.ptd 第7頁 1242903 五、發明說明（2) (曰adaptive OFF-time circuit)135、變壓器122、開關電日日體124、閂（Latch)126以及輸出二極體142。電源傳送電路120是經由輸出二極體142與閃光燈電容144連接在一起。輸出二極體142的正極連接到變壓器122輸出端的第2 繞，，其陰極連接到閃光燈電容144。輸入源17〇連接到變壓器122 —次側的輸入端。變壓器122的一次側輸出端連接到開關電晶體124的集極。開關電晶體丨42的射極連接到適應工作期間的線路1 3 〇。一次側以及二次側之繞組電極方向最好是安排讓相對應的繞組極性相反。如第1圖所示的極性標示11 2及11 4說月人側以及一次側繞組的極性是相反的。這種相反的極性女排對於要應用一種返馳線路拓撲（f 1 yback c i r cui t topology)時是很有用的。適應工作期間的線路1 3 0包括一個第一開關電阻1 3 1，其連接於開關電晶體丨24的射極並構成工作期間的交點 13 4 工作期間線路1 3 0還包括一個工作期間比較器1 3 2。工作期間比較器1 3 2和工作期間交點1 34及工作期間參考電壓Vrefi 1 3 3連接以接收電壓訊號。適應不工作期間的線路1 3 5包括一個第二開關電阻 1 36 ’用以連接到變壓器丨22的第二繞組以及不工作期間比較器137的正向（11011一丨11¥6]：1^118)端。不工作期間比較器 137同時也接收一個不工作期間參考電壓信號—v_ 138。不工作期間的參考電壓—yREF2 138之所以表示為負值是因為跟經過第二開關電阻1 3 6的反向電壓作比較。0842-a40213twf (n2); victorcho.ptd Page 7 1242903 V. Description of the invention (2) (adaptive adaptive OFF-time circuit) 135, transformer 122, switch electric sun body 124, latch 126, and output diode体 142. The power transmission circuit 120 is connected to the flash capacitor 144 via an output diode 142. The anode of the output diode 142 is connected to the second winding of the output terminal of the transformer 122, and its cathode is connected to the flash capacitor 144. Input source 17 is connected to transformer 122 — the input of the secondary side. The primary output terminal of the transformer 122 is connected to the collector of the switching transistor 124. The emitter of the switching transistor 42 is connected to the line 13 during the suitable operation. The directions of the winding electrodes on the primary and secondary sides are preferably arranged so that the corresponding windings have opposite polarities. The polarity indications 11 2 and 11 4 as shown in Fig. 1 say that the polarity of the human-side and primary-side windings are opposite. This opposite polar women's volleyball team is useful when applying a flyback circuit topology (f 1 yback c i r cui t topology). The line 1 3 0 adapted during operation includes a first switching resistor 1 3 1 which is connected to the emitter of the switching transistor 24 and forms an intersection point during operation 13 4 The line 1 3 0 during operation also includes a comparator during operation 1 3 2. The comparator 1 3 2 during operation and the intersection point 1 34 during operation and the reference voltage Vrefi 1 3 3 during operation are connected to receive the voltage signal. The line 1 3 5 adapted to the non-operation period includes a second switching resistor 1 36 ′ for connection to the second winding of the transformer 22 and the forward direction of the comparator 137 during non-operation period (11011- 11 ¥ 6): 1 ^ 118). The comparator 137 during the non-operation period also receives a reference voltage signal during the non-operation period—v_138. The reference voltage during non-operation-yREF2 138 is expressed as a negative value because it is compared with the reverse voltage through the second switching resistor 1 3 6.

1242903 五、發明說明（3) 2應工作期間線路丨30以及適應不工作期間線路135分別挺供一個給閃126使用的信號。舉例來說 ^固設^重置（set/reset)閃。特別是當閃126的重置部疋刀和工作期間線路130連接以接受其輸出，並且設定部分 3二工：士期間線路135連接以接受其輸出的情況下。如果 ^彳接受到設定和重置信號，重置信號的輸入將取侍優先柘。閃126根據工作期間線路13〇以及不工作 :135所提供的輸出提供一個閃鎖輸出給開關電晶體…的作。來產生直^電轉直〜電所需要的交換（switching)動習見如上所述之線路，除了變壓器以及閃光燈外=線路及元件會存在單一的一顆積體電路（IC)中。朱電壓VREF1 133及V_ 138在積體電路製作時就已經決所以變充電電流限制的方法。㈣閃光燈及照“ 糸統a又叶是不利的。【發明内容】有鑑於此，本發明之目的在於提供一個方法及元用個可以5周整的充電電流限制來對閃光燈電容充雷。、本發明提供一個方法對閃光燈電容的充電作控制。該方法包含.當一個啟動信號產生時產生一個輸入電流= 誘發一個給閃光燈電容充電的電流；偵測表示閃光燈電壓的一個第一電壓以及對應輪入電流的一個第二表壓；利用測得該第一電壓低於及高出一個第一參考電1242903 V. Description of the invention (3) 2 The line 3030 during the working period and the line 135 which is suitable for the non-working period are respectively provided for a signal for the flash 126. For example, ^ Fixed ^ set / reset flash. Especially when the resetting unit of the flash 126 is connected to the line 130 during work to receive its output, and the setting part 32 is connected to the line 135 during the taxi to accept its output. If ^ 彳 receives the setting and reset signals, the input of the reset signal will take priority. Flash 126 provides a flash-lock output to the switching transistor according to the output of line 13 and non-operation: 135 during operation. It is necessary to generate the switching operations required for direct to direct conversion of electricity. As mentioned above, except for the transformer and the flashlight, the circuits and components will be stored in a single integrated circuit (IC). The Zhu voltages VREF1 133 and V_ 138 have already been decided when the integrated circuit is manufactured, so the method of changing the charging current limit is already determined. ㈣Flash and photos are not good. [Summary of the Invention] In view of this, the purpose of the present invention is to provide a method and use a charging current limit that can be adjusted for 5 weeks to charge the flash capacitor. The present invention provides a method for controlling the charging of a flash capacitor. The method includes: generating an input current when a start signal is generated = a current that induces charging of a flash capacitor; detecting a first voltage indicating a flash voltage and a corresponding wheel A second gauge voltage of the input current; the measured first voltage is lower than and higher than a first reference voltage

1242903 五、發明說明（4) _ 狀怨f制一個再充電訊號的發出及取消；利用測得該第一電壓高出及低於一個第二參考電壓之狀態控制一 °雷、、☆二制訊號的發出β· π + $ & + ^ ， A /瓜限赛取嚷B士 + 在再電h號發出及電流限制％ …4令’才發出前述啟動信號；提供一個腳位 ° 定第二參考電壓的電阻元#。以連接決本發明近一步提供一個與一個微處理器連 J容2裝置1閃光燈電容充電裝置包括：一：匕燈 \ ^固啟動仏號產生時產生一個輸入電流藉以誘蘇 :丨：閃光燈電容充電的電流；-個重新充電控制裝Ϊ :: 巧不閃光燈電容電壓的一個第—電壓偵電J低於及高出一個第一參考電壓之狀態控制」 ^ : 2發出及取消；一個電流限制裝置，偵測對應輪入雷 2的I個第二電壓並利用測得該第二電壓高出及‘於—電之狀態控制一個電流限制訊號的發出及取則逃啟動信號；其中第二參考電壓’才七出所決定。》^玉[的值疋由别迷微處理器 ΐί:還提供一個積體電路作為閃光燈電容的充電雷抓限制之用。該積體電路包含：、笛充電粟 :腳位，分別接到—個地（grQund)電壓、二個第個開關和-個電阻元件串及一個變壓器；-重新充電控制裝置連接m—及第四腳位之間；-個低於及高出一個第一參考電壓、付則这第一電壓之狀悲控制-個再充電訊號1242903 V. Description of the invention (4) _ Complaints Regarding the issuance and cancellation of a recharge signal; using the measured state where the first voltage is higher and lower than a second reference voltage to control 1 ° thunder, ☆ two systems The signal is issued β · π + $ & + ^, A / melon race takes 嚷 B + + is issued at the recharge h number and the current limit%… 4 orders' before the start signal is issued; provide a foot position Two reference voltage resistor element #. The present invention further provides a connection to a microprocessor, a capacitor, a device, and a flash capacitor charging device. The device includes: First, a dimmer lamp generates an input current when the 仏 solid start signal is generated to lure it: 丨: flash capacitor Charging current;-a recharge control device :: one of the first capacitor voltages of the flash capacitor-the state control of the voltage detection power J lower and higher than a first reference voltage "^: 2 issued and canceled; a current limit The device detects an I second voltage corresponding to the turn-in mine 2 and uses the measured second voltage to be higher and the state of 'on-electricity' to control the issuance of a current limit signal and flee the start signal; of which the second reference The voltage 'was just decided by the police. "The value of the jade [by Bie Mi microprocessor ΐί: also provides an integrated circuit as a charging lightning arrester for flash capacitors. The integrated circuit includes: a, a flute charging pin, which are respectively connected to a grQund voltage, two first switches, a resistor element string, and a transformer; a recharging control device connected to m and a Between the four pins;-a first reference voltage below and above the first reference voltage, and a control signal for this first voltage-a recharge signal

1242903 五、發明說明（5) 的發出及取消；一個第三腳位、一個比_ 較器線路，包含：一個電流源接到端接到前述開關及輪入接到第三腳位且其負輸入定輸入接到再充雷钟連接點；一個設定重設問，其設人接到比較器的輸：而J J以接收再充電信號，其重置輸【實施方式】出而其輸出接到前述開關的控制端。電容=== = =其種實現方法產生的閃光燈 3 ·個電谷C1、一個電壓增高變壓器21、一個積體電路 22、一個超快（ultra —fast)二極體Di、一個閃光燈電容 23、一個分壓器24以及一個可變電阻25。電壓增高變壓器 2^1用一次侧繞組的一端接收從輸入源2〇來的一次側輸入電壓，一次侧繞組的另一端接到積體電路22的別17(：{1腳位；因此有在積體電路2 2把S W ITCΗ這個腳位接到地端的時候會產生一個輸入電流來觸發一個給閃光燈電容的充電電、流。SWITCH這個腳位只有在積體電路22 —個内部作用作號 V S (第2 A圖中未表示，稍後將會描述）發出時會接到地端。積體電路22包含最少五個腳位：VIN、GND、νρβ、 LIMIT以及SWITCH，分別接到：從輸入源2〇來的一次側輸入電壓、一個地電壓、從分壓電路24來的輸出電壓以偵^ 在閃光燈電容上的電壓、電阻元件2 5以及電壓升高變塵= 21的一次側繞組。積體電路22從分壓器24接收到輸出電^ V F B，在當電壓V F B比一個參考電壓V B G低的時候發出—個1242903 V. Issuance and cancellation of invention description (5); a third pin and a comparator circuit, including: a current source connected to the aforementioned switch and a wheel connected to the third pin and its negative The input fixed input is connected to the recharge thunder clock connection point; a setting reset is asked, and it is set to receive the input of the comparator: and JJ receives the recharge signal and resets the input. Control terminal of the switch. Capacitance ===== Flash produced by one of its implementation methods3. An electric valley C1, a voltage increasing transformer 21, an integrated circuit 22, an ultra-fast diode Di, a flash capacitor 23, A voltage divider 24 and a variable resistor 25. The voltage increasing transformer 2 ^ 1 receives the input voltage of the primary side from the input source 20 with one end of the primary winding, and the other end of the primary winding is connected to the other 17 (: {1 pin of the integrated circuit 22; Integrated circuit 22 When the SW ITCΗ pin is connected to the ground, an input current will be generated to trigger a charging current and current to the flash capacitor. The SWITCH pin is only used in the integrated circuit 22-an internal function number VS (Not shown in Figure 2A, which will be described later.) It will be connected to the ground when it is issued. The integrated circuit 22 includes at least five pins: VIN, GND, νρβ, LIMIT, and SWITCH, respectively connected to: from the input The primary side input voltage from source 20, a ground voltage, and the output voltage from voltage divider circuit 24 are used to detect the voltage on the flash capacitor, the resistance element 25, and the voltage rise to dust = 21 primary winding. The integrated circuit 22 receives the output voltage ^ VFB from the voltage divider 24, and sends out when the voltage VFB is lower than a reference voltage VBG-one

I 0842-a40213twf(n2);victorcho.ptd 第11頁 1242903 五、發明說明（6) 内部再充電信號L-set並在電壓VFB比參考電壓vbg高的時候取消掉信號L-set。同時積體電路22偵測一個電壓vc來對應灸壓為2 1 —次側繞組的輸入電流，利用偵測到該電壓 vc高於或低於一個參考電壓v—limi1:的狀態來分別發出及取消一個内部電流限制信號。並且只有在再充電信x號發出及電流限制信號取消時發出前述啟動信號vs。參考ϋ V-limit是由一個可用從微處理器來的信號ADJ調整組^的電阻元件25所決定。積體電路22的細節如下參考第2β圖描述。 e 如第2B圖所示，積體電路22包括一個開關221、一個再充電控制裝置22 2、一個比較電路包含一個電流源223 -個比較器m、一個…置閃22 5以及一；;二22。3: 關221和電阻R1在腳位SWITCH及GND中間作串接。再充電控制電路222連接到腳位7〇、0仙及7?6以根據偵測到的電壓 VFB比參考電壓vBG (圖中未表示）低或高來分別發出或取消· 再充電信號L-set。電流源2 23接到腳位LIMIT。比較器224 的正輸入接到腳位L IΜIT，其負輸入接到開關2 2 1以及電阻 R1相接的接點。設定重置閂225將其設定輸入s接到再充電控制裝置222來接收再充電訊號L-set，將其重置輸入r接到比較器2 2 4的輸出並將其輸出Q接到開關2 2 1的控制端點。開關2 2 1如習知可為電晶體Μ 1。積體電路2 2的操作原理如下參考第3圖描述。 ” 電流源2 2 3產生一個定電源通過外接電阻2 5產生前述參考電壓V_ limit在腳位LIMIT上。於△〜；[期間，再充電裝I 0842-a40213twf (n2); victorcho.ptd Page 11 1242903 V. Description of the invention (6) The internal recharge signal L-set is canceled when the voltage VFB is higher than the reference voltage vbg. At the same time, the integrated circuit 22 detects a voltage vc corresponding to the input current of the moxibustion pressure of 2 1 —the secondary winding, and uses the detected state of the voltage vc to be higher or lower than a reference voltage v-limi1: Cancel an internal current limit signal. And the aforementioned start signal vs is issued only when the recharge signal x is issued and the current limit signal is cancelled. Reference ϋ V-limit is determined by a resistive element 25 which can be used to adjust the signal ADJ from the microprocessor. The details of the integrated circuit 22 are described below with reference to Fig. 2β. e As shown in Figure 2B, the integrated circuit 22 includes a switch 221, a recharge control device 22 2, a comparison circuit including a current source 223-a comparator m, a ... flash 22 5 and one; two 22.3: Close 221 and resistor R1 in series between SWITCH and GND. The recharge control circuit 222 is connected to pins 70, 0, and 7-6 to issue or cancel the recharge signal L- according to the detected voltage VFB being lower or higher than the reference voltage vBG (not shown), respectively. set. The current source 2 23 is connected to the pin LIMIT. The positive input of the comparator 224 is connected to the pin L IMIT, and its negative input is connected to the contact connected to the switch 2 2 1 and the resistor R1. The setting reset latch 225 connects its setting input s to the recharge control device 222 to receive the recharge signal L-set, connects its reset input r to the output of the comparator 2 2 4 and its output Q to the switch 2 2 1 Control endpoint. The switch 2 2 1 may be a transistor M 1 as known. The operation principle of the integrated circuit 22 is described below with reference to FIG. 3. ”The current source 2 2 3 generates a constant power supply and generates the aforementioned reference voltage V_ limit on the pin LIMIT through an external resistor 2 5. In △ ~; [period, recharge the device

1242903 五、發明說明（7) --- 置2 2 2偵測到電壓VFB比參考電壓VBG還低時發出（拉低）再充電信號L-set。在期間A時，比較器2 24於偵測到電壓％比參考電壓V-1 i mi t還低時取消（拉高）電流限制信號 L-reset，所以設定重置閃2 2 5因為再啟動信號^3^發出且電流限制信號L-reset取消，而發出（拉高）啟動信號 VS。發出的啟動信號vs打開電晶體Ml，造成變壓器21 一次側的迴路關閉而產生輸入電流。如此電壓VF]B由於輸入電流觸發的充電電流而升高。在期間B時，電壓vc被偵測到已超過參考電壓V-Limit所以電流限制信號L —reset被發出 (拉低）’設定重置閂因此取消（拉低）啟動信號”以關閉電晶體Ml ;如此便切斷了輸入電流，電壓vc因此降低直到小於V-limit。在期間C〜I中，在a 期間發生的操作重複如第3圖所示。在期間j時，閃光燈電容23已經被過度充電而電壓VFB比電壓VBG還要高。再充電控制裝置222因此取消 (拉高）再充電信號L-set所以設定重置閂225也取消（拉低）-啟動訊號VS來關掉電晶體Μ1，閃光燈電容的充電因此停 ^。由於設定重置閃的特性，將會在信號L-set取消時將信號L - r e s e t於内部拉低。一在第3圖中，電壓VFB在期間Α〜ι時從最低電位（接近〇) 升咼到VBG。這過程在產生閃光後立即發生。請注意最大的充電電流值被電壓V- 1 i mi t限制為一個定值。既然積體電路22透過腳位LIMIT連接到外部電阻元件25，閃光燈及照相機設計者可以輕易的將參考電壓調定為想要的值。甚至如弟2 A圖所示，外接的電阻元件2 5可以是一個可以透過1242903 V. Description of the invention (7) --- Set 2 2 2 When it detects that the voltage VFB is lower than the reference voltage VBG, it issues (pulls down) the recharge signal L-set. During period A, the comparator 2 24 cancels (pulls up) the current limit signal L-reset when it detects that the voltage% is lower than the reference voltage V-1 i mit, so the reset flash 2 2 5 is set to restart The signal ^ 3 ^ is issued and the current limit signal L-reset is canceled, and the start signal VS is issued (pulled up). The issued start signal vs turns on the transistor M1, causing the primary circuit of the transformer 21 to close and generating an input current. Thus the voltage VF] B increases due to the charging current triggered by the input current. During period B, the voltage vc is detected to have exceeded the reference voltage V-Limit so the current limit signal L —reset is issued (pulled down) 'setting the reset latch and therefore canceled (pulled down) the start signal' to turn off the transistor Ml ; In this way, the input current is cut off, and the voltage vc is reduced until it is less than V-limit. During the period C ~ I, the operation repeated in the period a is shown in FIG. 3. At the period j, the flash capacitor 23 has been Overcharge and the voltage VFB is higher than the voltage VBG. The recharge control device 222 therefore cancels (pulls up) the recharge signal L-set so the setting reset latch 225 also cancels (pulls down)-the activation signal VS to turn off the transistor Μ1, the charging of the flash capacitor is stopped ^. Due to the reset flash feature, the signal L-reset will be pulled low internally when the signal L-set is canceled. First, in Figure 3, the voltage VFB is in the period A ~ ι rises from the lowest potential (close to 0) to VBG. This process occurs immediately after the flash is generated. Please note that the maximum charging current value is limited to a fixed value by the voltage V-1mit. Since the integrated circuit 22 passes through Pin LIMIT is connected to external power Element 25, and a camera flash designer can easily set the reference voltage adjusted to the desired value even as shown in FIG. 2 A brother, external resistive element 25 may be a permeable

0842-a40213 twf(n2);v i c torcho.ptd 第13頁 12429030842-a40213 twf (n2); v i c torcho.ptd Page 13 1242903

五、發明說明（8) =相機中微❹里器的一個腳位謝來調整電阻值的可變電程圖第四圖是-個本發明所涵蓋閃光燈電容充電方法的流泡放ΐ:Γ:°光中，—個閃光燈電容經由離子化的閃光燈在步驟S41巾’偵測出一個在閃光燈電容上的和一個對應變壓器一次侧輸入電流的電壓yc。在步驟S42中’提供一個電流源產生經過一個阻的定電流。獲電在步驟S43中，在偵測到電壓m小於一個參考電壓 %奄出再充電信號。並在偵測到電壓vc小於外接兩端電壓差V-1 i mi t時取消電流限制信號。在步驟S44中’因為再充電信號發出及電流限制信號消，發出啟動信號。如此會將開關接通而使變壓器一1 側迴路關閉。這會產生一個輸入電流以觸發一個給閃光燈電容的充電電流。、在步驟S45中，因為電壓VC升高超過V—limi t而發出電机限制“號。啟動#號因為電流限制信號的發出而取消並切斷開關，造成輸入電流停止。在步驟S46中’電壓VC因為輸入電流停止開始降低。當電壓VC降到比電壓V-limit低時，電流限制信號將被取消。在步驟S47中，當電壓VFB高出電壓VBG時，再充電信V. Description of the invention (8) = a variable circuit diagram of a pin in the camera to adjust the resistance value The fourth picture is a blister discharge method of a flash capacitor charging method covered by the present invention: Γ : In the light, a flash capacitor detects a voltage yc on the flash capacitor and a corresponding input current of the transformer primary side via the ionized flash in step S41. In step S42 ', a current source is provided to generate a constant current through a resistor. Power-on In step S43, a recharge signal is generated when it is detected that the voltage m is less than a reference voltage%. When the voltage vc is detected to be less than the voltage difference between the external terminals V-1 imit, the current limit signal is cancelled. In step S44, a start signal is issued because the recharge signal is issued and the current limit signal is cancelled. This will turn on the switch and close the transformer 1-side loop. This generates an input current to trigger a charging current to the flash capacitor. In step S45, the motor limit "No." is issued because the voltage VC rises above V-limit. The start # number is cancelled and the switch is turned off because of the current limit signal, causing the input current to stop. In step S46 ' The voltage VC starts to decrease because the input current stops. When the voltage VC drops below the voltage V-limit, the current limit signal is canceled. In step S47, when the voltage VFB is higher than the voltage VBG, the recharge signal

0842-a40213twf(n2);victorcho.ptd 第14頁 1242903 五、發明說明（9) 號便被取消。此便結束了閃總而言之電，以及一個流限制是可調個腳位可以外來，閃光燈及制值調定，甚限制值作設定雖然本發限定本發明，和範圍内，當範圍當視後附如啟動信號因為再充電信號的取消而取消光燈電容的充電。 ’本發明提供一個方法用來對閃光燈電容充閃光燈電容的充電裝置，其中的一個充電電的°該充電限制線路設計成讓積體電路有一接一個電阻元件來決定電流限制值。如此一照相機的設計者可以輕易地將想要的電流限至可以由使用者手動或微處理器自動對電流〇明已以較佳實施例揭露如上，然其並非用以任何熟習此技藝者，在不脫離本發明之精神可作些許之更動與潤飾，因此本發明之保護之申請專利範圍所界定者為準。0842-a40213twf (n2); victorcho.ptd Page 14 1242903 5. The description of invention (9) was cancelled. This is the end of the flash. In general, and a flow limit is adjustable. A foot can be adjusted. The flash and the setting value can be adjusted. Even the limit value is set. Although the present invention limits the scope of the invention, and the range, the For example, the start signal is cancelled due to the cancellation of the recharge signal. The present invention provides a method for charging a flash capacitor, a charging device for the flash capacitor, and one of the charging capacitors. The charging limit circuit is designed so that the integrated circuit has one resistance element after another to determine the current limit value. The designer of such a camera can easily limit the desired current to the current that can be manually or automatically controlled by the user. It has been disclosed above in a preferred embodiment, but it is not intended for anyone skilled in the art. Changes and modifications can be made without departing from the spirit of the invention. Therefore, the scope of the patent application for protection of the invention shall prevail.

1242903 圖式簡單說明【圖示簡單說明】本發明透過後附詳細說明的圖示將會比較容易全盤了解，其僅為圖解之用而非將本發明限制於圖示範圍。第1圖表示一個美國專利6, 5 1 8, 733號中揭露的閃光燈電容充電線路方塊圖；第2 A及2 B圖係為一個本發明實施例閃光燈電容充電裝置的線路方塊圖；第3圖係為使用於第2B圖中電容充電裝置的訊號序時圖；第4圖係為一種本發明實施例閃光燈電容充電方法的流程圖。【主要元件符號說明】 11 2、11 4繞組極性標示 1 2 0電源傳送電路 121電壓增高變壓器 124 電晶體 126 閂 130 適應工作期間的線路 131 第一開關電阻 132 工作期間比較器 133 工作期間參考電壓 134 工作期間交點 135 適應不工作期間的線路 136 第二開關電阻1242903 Brief description of the drawings [Simplified description of the drawings] The present invention will be easier to understand through the attached detailed illustrations, which are for illustration purposes only and do not limit the present invention to the scope of the illustrations. Figure 1 shows a block diagram of a flash capacitor charging circuit disclosed in US Patent No. 6, 5 1 8, 733; Figures 2 A and 2 B are circuit block diagrams of a flash capacitor charging device according to an embodiment of the present invention; FIG. 4 is a signal sequence diagram of the capacitor charging device used in FIG. 2B; FIG. 4 is a flowchart of a flash capacitor charging method according to an embodiment of the present invention. [Description of symbols of main components] 11 2, 11 4 Winding polarity indication 1 2 0 Power transmission circuit 121 Voltage increase transformer 124 Transistor 126 Latch 130 Adapted to the line during operation 131 First switch resistance 132 Comparator 133 during operation Reference voltage during operation 134 Intersection during operation 135 Adapt to the line during non-operation 136 Second switch resistance

0842-a40213twf(n2);victorcho.ptd 第16頁 1242903 圖式簡單說明 137 不工作期間比較器 138 不工作期間參考電壓 142 開關電晶體 144 閃光燈電容 20 輸入源 C1 電容 D1 超快二極體 21 電源增高變壓器 22 積體電路 23 閃光燈電容 24 分壓線路 25 可變電阻元件 VI N、VFB、LIMIT、AD J、SWITCH 信號名稱 GND 地電壓 2 2 1開關0842-a40213twf (n2); victorcho.ptd Page 16 1242903 Simple description of the diagram 137 Comparator during non-operation 138 Reference voltage during non-operation 142 Switching transistor 144 Flash capacitor 20 Input source C1 Capacitor D1 Ultrafast diode 21 Power supply Increase transformer 22 Integrated circuit 23 Flash capacitor 24 Voltage divider line 25 Variable resistance element VI N, VFB, LIMIT, AD J, SWITCH Signal name GND Ground voltage 2 2 1 Switch

Ml 開關電晶體 2 2 2再充電控制裝置 2 2 3電流源 2 2 4比較器 2 2 5設定重置閂 R1 電阻 VS、VC、V-limit 電壓及參考電壓名稱 L-set、L-reset 信號名稱Ml Switching transistor 2 2 2 Recharge control device 2 2 3 Current source 2 2 4 Comparator 2 2 5 Set reset latch R1 Resistor VS, VC, V-limit voltage and reference voltage name L-set, L-reset signal name

0842-a40213twf(n2);vie torcho.ptd 第17頁0842-a40213twf (n2); vie torcho.ptd p. 17

Claims

Μ β日佟(¾)正本 1號飞訂逆咖·- 六'申請專利範圍步驟：.種對閃光燈電容充電作控制的方法，該方法包含 -個二閃：：ijs號產生時，產生-個輪入電流藉以誘發 1α、σ閃先燈電容充電的電流；對應電容電㈣-電壓以及-個狀態及高出-個第-參考電壓之丹充電汛唬的發出及取消；利用測得該第-φ网a , 狀態控制-個電以=及低於一個第二參考電壓之口 ^电机限制矾旒的發出及取消；候發出' ί $ ί 2充電信號發出及該電流限制訊號取消的時候赞出别述啟動信號；提供一個腳位以揀Μ +义1» 以運接決疋前述第二參考電壓的電阻元仟0 μ t、$申=專利範圍第1項所述對閃光燈電容充電作控带洛一個戀=，輸入電流由前述啟動信號接通一個開關乂 Μ 墾态一次側迴路來產生，並由該啟動信號切斷開關來停止。別从中广專利範圍第1項所述對閃光燈電容充電作控的牛驟/，一步包含產生一個定電流通過前述電阻元件 y? ，/、中，該第二參考電壓是通過電阻元件兩端的電壓差。驻罟4 ·兮ΐ ϋ個u處理器一起作用的閃光燈電容的充電裝置，該裝置包含：Μ β sundial (¾) original No. 1 flying order inverse coffee · 6 'patent application steps: a method for controlling the charging of the flash capacitor, the method includes a second flash :: when the ijs number is generated,- Each turn-on current is used to induce the charging current of the 1α, σ flash-first lamp capacitors; corresponding to the capacitor voltage and voltage, and the state and the higher than the -th reference voltage of the Dan charging flood, the charge is issued and canceled; No.-φ network a, state control-a power supply = and below a second reference voltage port ^ motor limits the issuance and cancellation of alum; waiting to be issued 'ί $ ί 2 charging signal is issued and the current limit signal is cancelled At the time, praise the start-up signal; provide a pin to select M + 1 »to connect the resistance element that depends on the aforementioned second reference voltage: 0 μt, $ sup = the flash capacitor as described in item 1 of the patent range The charging operation is controlled by a switch, and the input current is generated by the aforementioned start signal turning on a switch, the primary circuit, and the start signal is used to stop the switch. Do n’t start from the first step of controlling the charging of the flash capacitor as described in item 1 of the China-wide patent range. One step includes generating a constant current through the aforementioned resistance element y ?, where the second reference voltage is the voltage across the resistance element. difference. Station 4 · Xiΐ A charging device for flash capacitors acting together with a u processor, the device includes:

1242903 --：--tjfe 931358M__f 月曰佟 π：六、、申^青專利範圍 ^ ---- 长一個變壓器，當一個啟動信號產生時產生一個輪入流藉以誘發一個給閃光燈電容充電的電流； ^ 一個再充電控制裝置，偵測一個來自於閃光燈電容壓的第一電壓，在測得第一電壓低於一個第一參考電=^ 時候發出一個再充電訊號，龙在第一電壓高出第一參的壓的時候取消再充電訊號；以及電一個電流限制裝置，偵測一個對應於輸入電流的第二電壓，在測得第二電壓低於一個第二參考電壓的時候笋: 一個電流限制訊號，並在第二電壓高出第二參考電壓= 候取消電流限制訊號；的時只有在再充電信號發出及電流限制訊號取消出前述啟動信號；读發其中’第二參考電壓是由微處理器所決定。 5 ·如申請專利範圍第4項所述與一個微處理器一起用的閃光燈電容的充電裝置，其中的電流限制裝置包含· 一個利用偵測到電壓高於或低於參考電壓的狀態^ ψ 或取消電流限制信號的比較器線路；以及出一個當再充電信號發出而且電流限制信號取消的時候發出啟動信號’在其他時間取消啟動信號的設定重置閂。、 6 ·如申請專利範圍第5項所述與一個微處理器一起作用的閃光燈電容的充電裝置，其中的比較器裝置包含·· 一個電流源；一個電阻元件，含有一個第一端接到電流源並且一個第二端接到地電壓；1242903-: --tjfe 931358M__f Month 佟 π: Six, the patent scope of the application ^ ---- long a transformer, when a start signal is generated, a turn-in cycle to induce a current to charge the flash capacitor; ^ A recharge control device detects a first voltage from the flash capacitor voltage, and sends a recharge signal when the measured first voltage is lower than a first reference voltage = ^, the dragon is Cancel the recharge signal when a reference voltage is applied; and power a current limiting device to detect a second voltage corresponding to the input current. When the measured second voltage is lower than a second reference voltage: a current limit Signal and the second reference voltage is higher than the second reference voltage = waiting to cancel the current limit signal; when the recharge signal is issued and the current limit signal cancels the aforementioned start signal; read out where the second reference voltage is processed by the micro processor Device. 5 · The charging device for a flash capacitor used with a microprocessor as described in item 4 of the scope of the patent application, wherein the current limiting device includes a state utilizing a detected voltage that is higher or lower than a reference voltage ^ ψ or Comparator circuit for canceling the current limit signal; and a reset signal to issue a start signal when the recharge signal is issued and the current limit signal is canceled. 6. The charging device for a flash capacitor that works with a microprocessor as described in item 5 of the scope of the patent application, where the comparator device includes a current source; a resistance element containing a first terminal connected to the current Source and a second terminal connected to ground;

0842-a40213twfl(n2);victorcho.ptc 第19頁 1242903 案號 93135SFiQ 六'申請專利範圍 —個比較器，含有一個正端接到電阻元件的第— 一個查山丨而，貝端接收偵測到的第二電壓，以及一個輪出端輪 k限制信號；印冤其中，電阻元件的值是可以調整的。、7 ·如申請專利範圍第4項所述與一個微處理器一起作光燈電容的充電裝置，進一步包含一個接在輪入電 /；，L彳！上的開關，分別在啟動信號發出及取消時接通及切 8·如申請專利範圍第4項所述與一個微處理器一起流燈電容的充電裝置，進一步包含一個接在輸入電端的Ϊ壓Ϊ電阻，#中，偵測到的第二電壓即為該電阻兩包含9:·—種對閃光燈電容的充電電流做限制的積體電路， ’分別接到一個地電電壓、一個電阻元件第四及第一腳位之第一、第二、第三以及第四腳位壓、一個從閃光燈電容偵測到的第一以及一個變壓器；個開關和一個電阻元件串接在間；第一腳位，分別利用測一參考電壓之狀態來發 —個重新充電控制裝置連接到得前述第一電壓低於及高出一個第出及取消一個再充電訊號；一個比較器線路，包含：一個電流源，其接到第三腳位；以及0842-a40213twfl (n2); victorcho.ptc page 19 1242903 case number 93135SFiQ 6 'patent application scope-a comparator, including a positive terminal connected to the first resistance element-a check-up The second voltage and a k-limit signal at the output end of the wheel; in which the value of the resistance element can be adjusted. 7 · As described in item 4 of the scope of the patent application, the charging device for a light lamp capacitor with a microprocessor further includes a turn-on power / ;, L 彳! The switch on the switch is turned on and off when the start signal is issued and cancelled respectively. As described in item 4 of the scope of the patent application, the charging device that flows the lamp capacitor with a microprocessor further includes a voltage source connected to the input terminal ΪResistor, in #, the detected second voltage is the two integrated resistor circuits that contain 9: · —a kind of integrated circuit that limits the charging current of the flash capacitor, 'respectively connected to a ground voltage, a resistance element The first, second, third, and fourth pin pressures of the four and first pins, a first and a transformer detected from the flash capacitor; a switch and a resistance element are connected in series; the first pin Bits, each using a state of a reference voltage to send a recharge control device connected to the first voltage lower and higher than a first output and cancel a recharge signal; a comparator circuit, including: a current source , Which is connected to the third pin; and

案號 93135859 1242903 六、申請專利範圍一個比較器，其JE輸入接到第三腳位且端接到前述開關及電阻的連接點，一個設定重設閂，其設定輸入接到再充電控接收再充電信號，其重置輸入接到比較写信號接到前述開關的控制端。裔的輸出 10·如申請專利範圍第9 流做限制的積體電路，其 ^所述對閃光产、，前述開關直各 J _為一個電 0842-a40213twfl(n2);victorcho.ptcCase No. 93135859 1242903 Sixth, the scope of patent application A comparator, whose JE input is connected to the third pin and terminated to the connection point of the aforementioned switch and resistor, a setting reset latch, whose setting input is connected to the recharge control receiver and then The charging signal has a reset input connected to the comparison write signal and a control terminal of the switch. The output of the source 10. As described in the integrated circuit of the ninth stream of the scope of the patent application, the flash output is described in the above, and each of the aforementioned switches J _ is an electrical 0842-a40213twfl (n2); victorcho.ptc