M289013 八、新型說明： 【新型所屬之技術領域】 本創作係有關於一種切換式發光單元控制系統及控制裝置，特別是指一種 應用於控制發光單元發光之系統及控制裝置。 【先前技術】 發光元件，如發光二極體（light emission diode ; LED)的發光效果，係 由流過發光元件電流的大小而定，高電流流過發光元件將獲得高亮度的發光效 春果，反之，若是減少流過的電流，則發光元件的亮度將相對的減弱。但持續提 供高電流會減少發光元件的使用壽命，並且浪費許多電力。 第一圖為習知發光單元控制電路之第一實施例。第一實施例中發光單元（由 發光元件Dl、D2."Dn組成）的發光效果，可由電壓源Vcc與電阻器沁配合，藉 由调整輸出驅動電流iLED的大小來加以控制。其中驅動電流iled為流過發光元件 Dl、D2...Dn之電流，驅動電流iLED可由下面公式（丨）得知：M289013 VIII. New Description: [New Technology Field] This creation is about a switching type lighting unit control system and control device, especially a system and control device for controlling the illumination of a light-emitting unit. [Prior Art] A light-emitting element, such as a light-emitting diode (LED), has a light-emitting effect depending on the magnitude of current flowing through the light-emitting element, and a high current flows through the light-emitting element to obtain a high-brightness light-emitting effect. On the contrary, if the current flowing through is reduced, the brightness of the light-emitting element will be relatively weakened. However, continuous supply of high current reduces the life of the illuminating element and wastes a lot of power. The first figure is a first embodiment of a conventional illumination unit control circuit. The light-emitting effect of the light-emitting unit (composed of the light-emitting elements D1, D2. " Dn) in the first embodiment can be controlled by adjusting the magnitude of the output drive current iLED by the voltage source Vcc and the resistor 沁. The driving current iled is a current flowing through the light-emitting elements D1, D2, ... Dn, and the driving current iLED can be obtained by the following formula (丨):
Λ .(1) 其中Vm、Vl.VDn分別為發光元件])丨、D2 . Dn的壓降；Rl為電阻器Ri之電阻 值 在第貫靶例中，主要缺點在於發光元件])1、D2…Dn的壓降會受元件的特 揀如4程、以及工作溫度··等的影響，而影響驅動電流！哪；同時電阻器匕 會造成電路的功率損失。 第-圖為！知發光單元控制電路之第二實施例。第二實施例中電壓源％用以 提供—固定電力給·發光元#D1、D2 .城用。而發光元件m、D2加的發 M289013 光效果，可由電流源1〇加以調整。然而，此種控制方式下，因為電壓源Vs為高壓 發光元件D1、D2…Dn的壓降為低壓，因此電流源Ic會產生極大的功率損失。 【創作内容】 有鑑於此，本創作提供一種切換式發光單元控制系統及控制裝置，利用漭 過發光單元之JL作錢作為回難制，控制發光單元週雛的進行充放電，移 定發光單元的工作電流以增加發光單元的使用壽命。 本創作種切換式發光單元控制系統，包含儲能單元、放電單元、切換開 關、電流制單元與控織置。其親舰單元接錄人霞，提供串聯連接 之發光單元運作所需二作電流：切換關導通時，電流_單元與儲能單元以 及發光單元形成充電賴，使卫作電流断，並輸出―伽_峨；切換開 關截止哺電單讀該雛單元及該發光單元形成放電雜，卫作電流逐漸衰 減。 又1 . (1) where Vm, Vl.VDn are the voltage drop of the light-emitting element]), D2. Dn, respectively; Rl is the resistance value of the resistor Ri in the first target example, the main disadvantage is that the light-emitting element])1 The pressure drop of D2...Dn is affected by the special selection of components such as 4 steps, and the operating temperature, etc., which affects the drive current! Where; at the same time, the resistor 匕 will cause power loss of the circuit. The first picture is! A second embodiment of the illumination unit control circuit is known. In the second embodiment, the voltage source % is used to provide - fixed power to the illuminating elements #D1, D2. The light effect of the light-emitting elements m and D2, M289013, can be adjusted by the current source 1〇. However, in this control mode, since the voltage source Vs is a low voltage of the high voltage light-emitting elements D1, D2, ... Dn, the current source Ic generates an extremely large power loss. [Creation Content] In view of this, the present invention provides a switching type light-emitting unit control system and a control device, which utilizes JL of the light-emitting unit as a back-to-back system, controls charging and discharging of the light-emitting unit, and shifts the light-emitting unit. Operating current to increase the life of the lighting unit. The creative switching type lighting unit control system comprises an energy storage unit, a discharge unit, a switching switch, a current system and a control weaving. The pro-ship unit receives the person Xia, and provides the two currents required for the operation of the series connected light-emitting unit: when the switch-off is turned on, the current_unit and the energy storage unit and the light-emitting unit form a charging circuit, so that the current is broken, and the output is “ Gamma 峨; switch switch cut-off feeding single reading the chick unit and the lighting unit to form a discharge impurity, the Guardian current is gradually attenuated. also
控制系統中’使賭繼置根__電流峨輸出—控概號，用以控 繼切換。當辦_單元姻到工作錢雜顧鮮辦，控制 裝置控制切換·導通，使發光單元進行充電；當_.作電流回升至預設 的同準位¥ ’控織置使切換_截止，使發光單元放電。 “本触使用之控織置，包括有—脈波產生_以產生—脈寬訊號；一過 電流比較單來接收無較_紐訊號與m峨，讀出一重置 孔號控制《產生早兀透過_反向單元接收該脈寬訊號，同時根據該重置 訊號與該«峨，經-及閘單讀出—㈣喊；—輯單元接收該控制訊 5虎—以輸出-延遲訊號；—比較單元，接收並比較運算該偵測電流訊號與一第 一^界喊，以輪出—電流狀態訊號；—正反器根據該延遲訊號娜該電流狀 6 M289013 態訊號’用以輸出—週_整訊號到該脈波產生器。 以闡述 咬广、接下來的詳細說明皆為示範性質，是為了進-步說明本創作 ’申月專%有關本創作的其他目的與優點，將在後續的說明與圖示加 【實施方式】 * 2參考第三圖’摘作紐墟式發鱗元控儀統之魏_示意圖。 /考第®切換式發光早凡控⑽統包括控制裝置卜放電單元2、健能單元 3、電流偵測單元5、與切換開關別。 儲月匕早7〇 3 -端接收輪人電壓ViN，另—端透過欲控_發光單元4血切換 開關现與電流偵測單元5依序㈣連接至—接地端；放電單元2並聯連接於串 接的該瓣元3峨單沈罐置1雜_帽與糊測單元 5 〇 儲能單元3接收輸入龍L之電力提供發光單元4運作戶斤需之工作電流 /，電流她細sw導_，滅順流h，並輸出等比例 於工作電流Is之-_流職v, ; _置丨___㈣，並根 據偵測電流訊號Vl的大小控制一控制訊號％的輸出準位，以控制切換開㈣導 通或截止。 當控制裝置i控制切換開關料通時，儲能單元3透過發光單元4愈切換 開關sf與電流伽單元5連接至接地端，形成充電路徑。雛單元3的電力將 紅作電流Is達到預設的高準位；當切換開闕Sf截止時，館能單元3透過發光 早元嫩f⑽臟，轉跑瓣输懷電元件2 進行mm作，而逐漸下降至預設的低準位。上述之高、低準位係發光單元4 7 M289013 發光亮度預設的範圍。 /、中七光單％ 4可由-個以上之發光元件（如發光二極體①咖Emitting LED)自光LED、雷射二極體（Laser Di〇de ; LD )、高功率發光二 極體…等)串接組成。 本創作之切換式發光單元控制裝置與電源供應器搭配使用時，可整合於剛 L制為中因此偵測電流訊號V〗可透過觸控制器的接收端s職接收，而控 制訊號Vs可透過PWM控制器的輸出端Gate輸出。 第=A圖為本創作切換式發光單元控制系統的第一較佳實施例之電路示意 圖。在第車乂^知例中，切換開關例是由場效電晶體〇實現；儲能單元3是 “感器L只現’放電單凡2是由二極體D實現，電流偵測單元$則是由細 元件Rs實現。 a其中，電晶體Q之祕端連接放電單元2與發料元4 ;其_端連接控制 "之輸㈣GATE，麵極端連接侧元件&與控繼置1之接收端SENSE。 當场效電晶體Q導通時，_元件Rs可建立等_於功電流…貞測電流訊 號Vi。 第四B圖為本創作切換式發光單元控㈣'統之第二較佳實施例的電路示意 圖。第二難實蘭較錄施_蘭差異在概電單元2的組成，以 及放電單元2與其它單元的it接關係。 在第仏貝知例中，放電單元2係由—場效電晶體22連接一反向器加 組成。當場效電晶«受控於控制訊號Vs (高準位）而導通時，反向器2〇之輸 出（低準位）可使場效電晶體22截止。電感器[與發光單元_場效電晶體 Q與偵測元件Rs連制接地端形成充電路徑。 M289013 另外•场效電晶體Q受控於控制訊號Vs (低準位）而截止時，反向器20 ' 準位）將使物政電晶體22導通，而與電感器L以及發光單元4形 成放電路徑。 本創作揭露之切換式發光單元控制裝置之較佳 1包括有一脈波產生器14，脈波產生器14用以 請配合第三圖參考第五圖， 貫施例的電路示意圖。控制裝置 週期性的產生一脈心Λ ^ ，一弟一控制電路10連接於該脈波產生器μ，係 根據脈寬訊號PLS以及偵測In the control system, the gambling __current 峨 output-control number is used to control the switching. When the unit _ unit marriage to work money miscellaneous, the control device controls switching and conduction, so that the illuminating unit is charged; when the _. current rises to the preset same level ¥ 'control woven to make the switch _ cutoff, so that The light emitting unit is discharged. "The control uses the control to woven, including - pulse generation _ to generate - pulse width signal; an overcurrent comparison single to receive no _new signal and m 峨, read a reset hole number control "produce early Receiving the pulse width signal through the _reverse unit, and simultaneously, according to the reset signal and the «峨, via-and the gate read--(4) shouting; - the unit receives the control signal 5 tiger-to output-delay signal; a comparison unit that receives and compares the detected current signal with a first boundary call to turn-off a current state signal; the flip-flop according to the delay signal that the current state is 6 M289013 state signal 'for output— Week _ the whole signal to the pulse generator. To illustrate the bite, the following detailed descriptions are exemplary, in order to further explain the creation of this creation Subsequent explanations and illustrations plus [Embodiment] * 2 Reference to the third figure 'excerpted as the New-style scaly element control system's Wei _ schematic. / Kato® switchable illuminating early control (10) system including control device Discharge unit 2, energy unit 3, current detecting unit 5, and cutting Change the switch. The moon is 7 〇 3 - terminal receiving wheel voltage ViN, the other end is through the control _ light unit 4 blood switch is now connected with the current detecting unit 5 (4) to the ground terminal; discharge unit 2 parallel connection to the series of the valve element 3 峨 single sink can be set 1 miscellaneous _ cap and paste unit 5 〇 energy storage unit 3 receives the input of the power of the dragon L to provide the operating current / current of the operating unit She whirls _, destroys the downstream flow h, and outputs the proportional-to-operating current Is--_流职v, ; _set ___(4), and controls the output level of a control signal % according to the magnitude of the detected current signal Vl When the control device i controls the switching switch material to pass, the energy storage unit 3 is connected to the ground terminal through the switching unit sf and the current gamma unit 5 through the light-emitting unit 4 to form a charging path. The electric power will make the red current Is up to a preset high level; when the switching opening Sf is cut off, the hall energy unit 3 transmits the light through the early morning f (10) dirty, and the running valve is transferred to the electric component 2 for mm, and gradually decreases. To the preset low level. The above high and low level illumination units 4 7 M2 89013 The default range of illumination brightness. /, Zhongqiguang single % 4 can be more than one light-emitting component (such as LED diode Emitting LED) self-lighting LED, laser diode (Laser Di〇de; LD ), high-power light-emitting diodes, etc.). The switch-type lighting unit control device of this creation can be integrated with the power supply when it is used together with the power supply. Therefore, the detection current signal V can be touched. The receiving end of the controller receives the signal, and the control signal Vs can be output through the output of the PWM controller. The Fig. A is a circuit diagram of the first preferred embodiment of the creative switching type lighting unit control system. In the case of the vehicle 乂^, the switching switch example is realized by the field effect transistor ;; the energy storage unit 3 is “the sensor L is only present”, the discharge unit 2 is realized by the diode D, and the current detecting unit is It is realized by the thin element Rs. a, the secret end of the transistor Q is connected to the discharge unit 2 and the issuer 4; its _ terminal connection control " the input (four) GATE, the surface extreme connection side component & and the control relay 1 receiver SENSE. When the field effect transistor Q is turned on, the _ component Rs can establish the same as the work current... 贞 current signal Vi. The fourth B is a schematic circuit diagram of a second preferred embodiment of the creative switching type lighting unit control (four). The second difficult real blue is compared with the composition of the electric unit 2 and the connection relationship between the discharge unit 2 and other units. In the case of the first mussel, the discharge cell 2 is composed of a field effect transistor 22 connected to an inverter. When the field effect crystal «controlled by the control signal Vs (high level) is turned on, the output of the inverter 2 (low level) can turn off the field effect transistor 22. The inductor [with the light-emitting unit_ field effect transistor Q and the detecting element Rs connected to the ground to form a charging path. M289013 In addition, when the field effect transistor Q is controlled by the control signal Vs (low level) and the off-state 20 ' level is turned on, the transistor 22 is turned on, and the inductor L and the light-emitting unit 4 are formed. Discharge path. Preferably, the switching illumination unit control device disclosed in the present application comprises a pulse generator 14 for matching the third diagram with reference to the fifth diagram, and the circuit diagram of the embodiment. The control device periodically generates a pulse heart ^, and the control circuit 10 is connected to the pulse wave generator μ according to the pulse width signal PLS and the detection
偵貝W與一第一臨界訊號Vrefi的比較結果，用 以輸出&制錢vs，—第二控制電路12連接於該脈波產生器Μ與第—控制電 路10 ’第二控制魏12 _控舰號V爾細糕《 V,與第二臨界訊號 VREF2的比較結果’輸出―職難喊⑽。週綱整喊⑽用明期性的調 整該脈寬訊號PLS的週期。 弟-控制電路10具有—過電流比較單元1〇4，用以接收並比較運算該_ 电桃减W與该第-臨界訊號v_，並在侧電流峨％上升至第—臨界訊號 乂_時，輸出一重置訊號s職τ(低準位）；一控制訊號產生單元⑽連接於該過電 机比杈早7G 104 ’且透過一反向單元1〇2連接於該脈波產生器卜控制訊號產生 單元⑽輸出端Q之輸出是依據輸人端D接收的電壓訊號I，以及時脈端CK透 過反向單元⑽接收反向的脈寬赚PLS啸以輸出，並在重置端r接收重置 訊號Sreset(低準位）時，調整該輸出。 -及閘單元1G8連接反向單元⑽與控觀號產生單元⑽之輸出端Q，用 以接收反向的脈寬訊號PLS以及控制訊號產生單元雇之輸出，以控繼控制 訊號Vs。其中及閘單元1〇8透過反向單元搬無脈寬訊紐s係用以控制控 制訊號Vs的最大工作週期。 9 M289013 該第二控制電路12使用一延遲單元120連接於該第一控制電路1〇，以接收 該控制訊號Vs，並於—延遲時間L後輸出—延遲訊號Vd ; _比較單元la接收 並比較運算該偵測電流訊號Vi與該第二臨界訊號VreF2，並於偵測電流訊號v上 升至第二臨界訊號時，輸出一電流狀態訊號Vsd ;及一正反器122連接於二亥 延遲单兀120、該比較單元124及該脈波產生器14。正反器122的時脈端⑶接 收延遲訊號VD後，同時儲存從輸入端D接收的電流狀態訊號而於輪出端q 輸出該週期調整訊號U/J)。 _ 其十’延遲時間Tdl可以用來避免控制訊#bVs產生時因雜訊干擾而誤判（延 遲單元120的運作係為習知技術在此不再贅述）；而發光單元㈣亮度可由< — 第-臨界訊號v_、第二臨界訊號乂以及延遲單元12〇的延遲時間來調整。透 過設計第-臨界訊號v_與第二臨界訊號—影響切換開關之切換，可設定工作 電流Is的準位範圍，進而控制發光單元4的亮度範圍。 配合第五圖，請參考第六圖本創作控制裝置中脈波產生器的較佳實施例之 電路方塊圖。脈波產生器14使用一上/下計數單元142連接該第二控制電^， 1脈波產生器14根據該週期調整訊號U/D，輸出-控制編碼訊號ι·Νη; 一可程 式充電電流單元144連接於該上/下計數單元142，用以接收該控制編碼誠The result of the comparison between the detective W and a first critical signal Vrefi is used to output & the money vs, the second control circuit 12 is connected to the pulse generator Μ and the first control circuit 10 'the second control Wei 12 _ Control ship No. V fine cake "V, compared with the second critical signal VREF2" output - job hard to shout (10). Zhou Gang shouted (10) to adjust the period of the pulse width signal PLS with a clear period. The control circuit 10 has an overcurrent comparison unit 1〇4 for receiving and comparing and calculating the _ electric peach minus W and the first critical signal v_, and when the side current 峨% rises to the first critical signal 乂 _ Outputting a reset signal s job τ (low level); a control signal generating unit (10) connected to the motor is 7G 104' earlier than the motor and connected to the pulse generator through a reverse unit 1〇2 The output of the output terminal Q of the control signal generating unit (10) is based on the voltage signal I received by the input terminal D, and the clock terminal CK receives the reverse pulse width earning PLS through the reverse unit (10) to output, and is at the reset terminal r. Adjust the output when receiving the reset signal Sreset. - The gate unit 1G8 is connected to the output unit Q of the reverse unit (10) and the control unit (10) for receiving the reverse pulse width signal PLS and the output of the control signal generating unit to control the control signal Vs. The gate unit 1〇8 transmits the pulseless wide signal through the reverse unit to control the maximum duty cycle of the control signal Vs. 9 M289013 The second control circuit 12 is connected to the first control circuit 1〇 by using a delay unit 120 to receive the control signal Vs, and outputs a delay signal Vd after the delay time L. The comparison unit 1a receives and compares The detection current signal Vi and the second threshold signal VreF2 are calculated, and when the detection current signal v rises to the second threshold signal, a current state signal Vsd is output; and a flip-flop 122 is connected to the second-half delay unit 120. The comparing unit 124 and the pulse wave generator 14. After receiving the delay signal VD, the clock terminal (3) of the flip-flop 122 simultaneously stores the current state signal received from the input terminal D and outputs the period adjustment signal U/J at the round-trip terminal q. _ The tenth delay time Tdl can be used to avoid misjudgment due to noise interference when the control message #bVs is generated (the operation of the delay unit 120 is not described in the prior art); and the brightness of the light unit (4) can be controlled by < The delay time of the first critical signal v_, the second critical signal 乂, and the delay unit 12〇 is adjusted. By designing the first critical signal v_ and the second critical signal, which affect the switching of the switching switch, the level range of the operating current Is can be set, thereby controlling the brightness range of the light emitting unit 4. With reference to the fifth figure, please refer to the circuit block diagram of the preferred embodiment of the pulse wave generator in the authoring control device of the sixth drawing. The pulse generator 14 is connected to the second control unit by using an up/down counting unit 142. The pulse generator 14 adjusts the signal U/D according to the period, and outputs a control code signal ι·Νη; a programmable charging current The unit 144 is connected to the up/down counting unit 142 for receiving the control code.
NcJn亚據啸制—充電電流Ie之大小；—可程式放電電流單元146連接於該 上/下計數單幻42，係接收該控制編碼訊號，並據以控制—放電電流Id 之大小。 -電容ϋ cs連可程式充钱解元144與該可程式放電電流單元 146，用以接收該充電電流Ie或根據該放電電流㈣行放電，以提供—參考訊號 V®展絲％ 148連接於該電容器Cs、可程式充電電流單元144、與可程式 10 M289013 放電電流單元146，係根據該參考訊號ι，輸出該脈寬訊號_—、古 娜鲁用以控_電_放_ __…‘二 的組成方式係為習知技術不再贅述。NcJn is based on the size of the charging current Ie; the programmable discharge current unit 146 is connected to the up/down counting single illusion 42, which receives the control coded signal and controls the discharge current Id accordingly. - a capacitor ϋ cs connected to the programmable charge unit 144 and the programmable discharge current unit 146 for receiving the charge current Ie or discharging according to the discharge current (four) to provide - the reference signal V® wire % 148 is connected to The capacitor Cs, the programmable charging current unit 144, and the programmable 10 M289013 discharging current unit 146 output the pulse width signal _- according to the reference signal ι, and the Gunaru control _ electric_put___... The composition of the second method is not described in the prior art.
w/L古:_收到的參考訊號Vref低於—低臨界電壓Vl ’且週期調整訊 γ ‘、，、4位時，上/下計數單謂上數運算，控制編碼訊號l.Nn控制可 程式充電_元144 _可程錢_單元146輸_流量（即充電電 ^與放電電流1〇增加，此時充電電流控制訊號磁（高準位），充電電流 早兀144内部的開關導通，充電電流_電容器&充電，參考訊號^逐漸變 大(斜率增加）’所以脈寬訊細的週期減少（低準位狀態的時間增加）’因此 控制訊號Vs高準位狀態的軸加，切換_ sw導通時_對增長，建立 定工作電流Is。 〜 另外，當震盈單元148接收到的參考訊號v咖高於一高臨界電壓％，但週期 調整訊號M)為嫩時，上m懈元142 τ_，可蝴電電流單元 144’、可红式放電電流早兀146輸出的電流量減小，脈寬訊號卩以產生（高準位） 使放電電流早％ 146内部的關導通，電容扣將依據放電電流Id進行放電， 因此參考訊號Vw的斜率變小，脈寬訊號PLS的週期加大（高準位狀態的時間增 加）因此控制魏％低準位狀態的時間增加，切換開關挪導通時間相對減少， 工作電流Is的流量將會因放電單元2的作職相對減少。 因此控制週期調整峨U/D將可調整脈波產生器14輸出脈寬訊號似的週 期，使控制訊號Vs輸出為高準位(切換開關Sf導通）的時間會限制在侧電流訊 號VI在第-臨界訊號V_與第二臨界訊號v麗之間。流過發光單元4的工作電流 I地會因切換開關SW的切換，而達到穩定，以提高發光單元4發光的穩定度。 M289013 配合第三圖與第五圖，請參考第七圖本創作之波形示意圖。當脈寬訊號似 由=準位降至低準位(脈波產生單元14開始工作，反向單元搬輸出高準位的 脈見錢PLS) ’且等比於工作電流…貞職流訊號力未上升至第—臨界訊號 V，，控制單元10輸出之控制訊號Vs為高準位訊號，切換開關泖導通，工作電 流Is會依據儲能單元3储存之電力與發光單元4之壓降而建立。 當_電流訊號Vl大於第—臨界訊號ν_時，控制訊號％為截止狀態(低準 位）’切換關SW戴止，放電單元2透過發光單^對儲能單元3進行放電， 工作電流IS逐漸的下降。如此湖性的產生控制訊號％。 當控制訊號Vs導通時(高準位），輯單元则始計數(延遲訊號％由低準 位轉至高準位），並在經過-段延遲時間K產生延遲峨Vd⑽準位轉至低準 位）’使控制正反㈣取得_測電流峨％與該第：臨界訊脇比較的结 果，而調整輸出該週期難訊號_之輸出，進而控婦光單元4進行充電或 放電。 、..不上所述，本創作切換式發光單元控制系統及控制|置，可以用來減低發 光單元發紐所雜的辨，並且提高其發光_定度，同時可以增長發光單 元的使用壽命。 淮=上所述’僅為本創作最佳的具體實施例之詳細說明與圖式，惟本創 ^特徵I卿卩曲t ’轉物_摘作，本_之_麵以下述之 凊^麵帛，从㈣物娜_姆綱化之實施 ^白應包爾_之範_，飾嶋項技藝者在她之領域内，可 之軸料_版爾之專利範圍。 12 M289013 震盪單元148 反向器20 儲能單元3 電流偵測單元5 切換開關SW 放電單元2 場效電晶體22 發光單元4 場效電晶體Q 偵測元件Rs 輸入電壓VlN 電容器Cs 脈寬訊號PLS 第一臨界訊號Vrefi 延遲時間Tdl 第二臨界訊號VrEF2 充電電流Ic 參考訊號Vref 控制編碼訊號No...Nn 充電電流控制訊號Sc 偵測電流訊號V! •控制訊號Vs 週期調整訊號U/D 重置訊號Sreset電壓訊號Vcc - 延遲訊號Vd - 電流狀態訊號VsD 放電電流Id 高臨界電壓Vh •低臨界電壓Vl 14w/L ancient: _ received reference signal Vref is lower than - low threshold voltage Vl ' and the period adjustment signal γ ',,, 4 bits, the up/down count single is the upper number operation, the control code signal l.Nn control Programmable charging _ yuan 144 _ can be converted _ unit 146 transmission _ flow (that is, charging electricity ^ and discharge current 1 〇 increase, at this time charging current control signal magnetic (high level), charging current early 144 internal switch conduction , charging current _ capacitor & charging, the reference signal ^ gradually becomes larger (increased slope) 'so the cycle of the pulse width is reduced (the time of the low level state is increased)' therefore the axis of the control signal Vs high level state, When the switch _ sw is turned on _ for the growth, the fixed operating current Is is established. ~ In addition, when the reference signal v received by the oscillating unit 148 is higher than a high threshold voltage, but the period adjustment signal M) is tender, the upper m The 142 τ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ The capacitor button will discharge according to the discharge current Id, so The slope of the test signal Vw becomes smaller, the period of the pulse width signal PLS is increased (the time of the high level state is increased), so the time for controlling the low level state of Wei is increased, the switching on and off time is relatively reduced, and the flow rate of the working current Is is decreased. The duty of the discharge unit 2 will be relatively reduced. Therefore, the control period adjustment 峨U/D will adjust the period in which the pulse wave generator 14 outputs a pulse width signal, and the time at which the control signal Vs is output to the high level (the switch Sf is turned on) is limited to the side current signal VI. - between the critical signal V_ and the second critical signal v. The operating current I flowing through the light-emitting unit 4 is stabilized by the switching of the switching switch SW to improve the stability of the light-emitting unit 4 to emit light. M289013 With the third and fifth figures, please refer to the waveform diagram of the seventh picture. When the pulse width signal seems to be reduced from the = level to the low level (the pulse wave generating unit 14 starts to work, the reverse unit carries the high level of the pulse to see the money PLS) 'and is equal to the working current... The control signal 10s outputted by the control unit 10 is a high level signal, the switching switch 泖 is turned on, and the operating current Is is established according to the power stored in the energy storage unit 3 and the voltage drop of the light emitting unit 4. . When the current signal V1 is greater than the first critical signal ν_, the control signal % is an off state (low level) 'switching off SW, and the discharge unit 2 discharges the energy storage unit 3 through the light emitting unit, the operating current IS Gradually falling. So the lake produces a control signal of %. When the control signal Vs is turned on (high level), the unit starts counting (the delay signal % is shifted from the low level to the high level), and after the delay of the -stage delay time K, the delay 峨Vd(10) is turned to the low level. "To control the positive and negative (4) to obtain the result of comparing the current 峨% with the first critical threshold, and to adjust the output of the period _ the output of the period, and then the control unit 4 to charge or discharge. ,.. not mentioned above, the creative switching type lighting unit control system and control|setting can be used to reduce the discrimination of the light-emitting unit, and to improve the luminous _degree, and at the same time, the life of the light-emitting unit can be increased. . Huai = above is only a detailed description and illustration of the best embodiment of this creation, but this is a feature of the creation of the characteristics of the I 卩 t ' t 'transfer _ extract, this _ _ face with the following 凊 ^ Face-to-face, from the implementation of (four) material Na _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 12 M289013 Oscillator unit 148 Inverter 20 Energy storage unit 3 Current detection unit 5 Switch switch SW Discharge unit 2 Field effect transistor 22 Light-emitting unit 4 Field-effect transistor Q Detection element Rs Input voltage VlN Capacitor Cs Pulse width signal PLS First critical signal Vrefi Delay time Tdl Second critical signal VrEF2 Charging current Ic Reference signal Vref Control coded signal No...Nn Charging current control signal Sc Detection current signal V! • Control signal Vs Cycle adjustment signal U/D reset Signal Sreset voltage signal Vcc - Delay signal Vd - Current status signal VsD Discharge current Id High threshold voltage Vh • Low threshold voltage Vl 14