M376097 五、新型說明： 【新型所屬之技術領域】 …f創作係關於—種調整電路，特別是關於-種針對 光源壳度進行控制之亮度調整電路。 【先前技術】 — 越來越多的-般性消費性電子產品整合有發光的功 •能，例如此發光功能可以當成照明或指示的用途使用，但 • 此發光功能所提供之發光亮度通常是單-亮度，而益法且 有調光之功能。然而在某些電子產品中，則是具有調光功 能，例如顯示裝置中所使用之背光源則具有此功能，以滿 足顯示裝置可以呈現不同亮度晝面之需求。 而現行調光所採用的控制方式之一，則可以如第一圖 所示，其係由一驅動電路9來對各發光二極體LE〇i、 LED2、LED3進行發光亮度之控制，其中驅動電路9内的 電荷泵模組94是連接有一移轉電容c，並用來將輸入端 . Vin的電荷耦合至輪出端v〇m ’以驅動發光二極體。而驅 ' 動電路9中的調光控制模組90則用來接收一處理器8所輸 ' 出之調光訊號，使電流槽模組92可以在調光控制模組9〇 的控制下，而對流經各發光二極體之電流大小做調整，工、 達到對發光二極體調光之效果。 乂 然而以驅動電路9進行調光之控制方式，由於驅動 路9本身具有一定的電流消耗，故此種調光方式顯然難: 符合現今環保省電之要求，而有符加以改進，同時，就/ 熟習此技藝的人士所知悉，這樣的調光驅動電路的、社構| 元件成本較高，增加了製造的成本。. 習用者，將可擴大其應用範圍。 錢其有別於 【新型内容】 本創作=目的，在於提供_種亮度調整電路，主 供-種電路簡單且不會消耗過㈣流， 光之亮度調整電路。 hi具有4 一為了達成上述目的，根據本創作的—種方案，提供一 t度調ίί路，適用於控制—發光單S，該發光單4 衫少—發光二極體。亮度難電路包括有-分壓電路及 一控制電路’其巾控制電路與分壓電_接，且可以用來 控制分壓，路輸出給發光單元使㈣—驅動電屋之大小， 以使發光單元能根據不同驅動電壓而相對產生不同亮度。 在本創作實施例中，控制電路接收一操作介面所輸入 光訊號，控制電路並根據訊號來控制驅動電壓 在本創作實施例中，控制電路接收一偵測介面所輸入 的一調光_，㈣魏並根據誠訊號麵_動電壓 的大小。 因此本創作透過上述的技術方案，將具有下述功戈. 以分壓方式來控制發光單元之發光亮度，如此可以減&整 ，電路之消耗電流，而具 式的電路變得簡單，+电效果，且也使調光控制方 以上之概述與接下;二二過多的硬體成本。 進-步說明本創作為達成曰况明及附圖，皆是為了能 功效。而有關本創作的1他的所採取之方式、手段及 及圖式中加以闡述。、 的及優點，將在後續的說明 【實施方式】M376097 V. New description: [New technical field] The f-creation system is about adjusting the circuit, especially the brightness adjustment circuit for controlling the shell of the light source. [Prior Art] — A growing number of general-purpose consumer electronics products incorporate integrated luminosity, such as the illuminating function, which can be used for lighting or indicating purposes, but • the illuminating brightness provided by this illuminating function is usually Single-brightness, and the method of dimming and dimming. However, in some electronic products, there is a dimming function. For example, a backlight used in a display device has this function to satisfy the requirement that the display device can exhibit different brightness levels. One of the control methods used in the current dimming can be as shown in the first figure, which is controlled by a driving circuit 9 for controlling the brightness of each of the LEDs LE〇i, LED2, and LED3, wherein the driving is performed. The charge pump module 94 in the circuit 9 is coupled to a transfer capacitor c and is used to couple the charge of the input terminal Vin to the wheel terminal v〇m' to drive the light emitting diode. The dimming control module 90 in the driving circuit 9 is configured to receive a dimming signal outputted by the processor 8, so that the current slot module 92 can be under the control of the dimming control module 9 The current flowing through each of the light-emitting diodes is adjusted to achieve the effect of dimming the light-emitting diodes. However, in the control mode of the dimming by the driving circuit 9, since the driving circuit 9 itself has a certain current consumption, the dimming method is obviously difficult: it meets the requirements of today's environmental protection and power saving, and is improved, and at the same time, Those skilled in the art are aware that such a dimming drive circuit has a higher cost of components and components, which increases the cost of manufacturing. The learner will be able to expand the scope of its application. Money is different from [New content] This creation = the purpose is to provide a kind of brightness adjustment circuit, the main supply-type circuit is simple and does not consume (four) flow, light brightness adjustment circuit. Hi has 4 in order to achieve the above purpose, according to the creation of the scheme, providing a t-degree adjustment, suitable for control - luminous single S, the luminous single 4 shirt less - luminous diode. The brightness hard circuit includes a voltage divider circuit and a control circuit, and the towel control circuit and the piezoelectric device are connected, and can be used to control the voltage division, and the output of the circuit to the light emitting unit enables (4) to drive the size of the electric house. The light emitting unit can relatively generate different brightness according to different driving voltages. In the present embodiment, the control circuit receives an optical signal input from an operation interface, and the control circuit controls the driving voltage according to the signal. In the present embodiment, the control circuit receives a dimming signal input by a detecting interface, (4) Wei and according to the size of the signal _ dynamic voltage. Therefore, through the above technical solutions, the present invention will have the following functions. The brightness of the light-emitting unit can be controlled by the voltage division method, so that the current consumption of the circuit can be reduced, and the circuit of the circuit becomes simple, + The electrical effect, and also makes the dimming control party above the overview and the next; two or two excessive hardware costs. The step-by-step description of this creation is for the purpose of achieving the results. And the way, the means, and the schema of his creation are explained. And advantages will be explained in the following [Embodiment]
請參閱第二圖，苴係A 電路之示意圖。亮度調整電路！^第—實施例之亮度調整 電路12，電路包括一控制電路10及一分壓 =至:使分壓電路12提供可變化的= 以祀單元14 ’以使發光單元14之發光亮度可 : 電壓V—呈現不同亮度。發光單元14在 光二極體以串聯、並聯或是串/並聯的方 别述刀壓電路12是包括有一第一電路121及一二 且第-電路121與第二電路122是相互串聯。第一電 、^11包括-第-電阻’如電剛；第二電路122是包括 =數個第二電阻’如電aR2、R3、R4，且各第二電阻之一 端輕接於第-電阻之一端’以及各第二電阻之另一端爐 =控制電路10 ’亦即各第二電阻之間是相互並聯。故當一 电源屯壓（VCC)供應至此分壓電路12時，藉由第一電路 121與第二電路122中所使用的電阻來對此電源電壓進行分 M376097 壓β，、即可得到一驅動電壓v⑽，此驅動電壓vout係由電源 乘以第—電路122之等效電阻值/(第一電路的等效電 阻值加上第二電路的等效電阻值）的分D式來得知。 故由上述分塵公式可知藉由改變第一電路121及/或第 二電，122的等效電阻值，即可使驅動電壓v〇m產生變化， 故^實施例為了達纽技術效果，主要是由控制電路1〇來 對第二電路122的等效電阻值進行控制，此控制方式是由控 制電路10各別輸出一邏輯準位訊號給每一第二電阻之一端 :此邏輯準位訊號可以是高邏輯準位（Logic Hi)訊號或 是低邏輯準位（Logic Low)訊號。更具體來說，當第二電 阻接收到的高邏輯準位訊號，此第二電阻並無法形成導通 迴路，反之當第一電阻接收到低邏輯準位訊號時則形成導 通迴路。 而剷述控制電路10是以可程式化的積體電路為主，例 如可以是微處理器、微控制器、現場可規劃邏輯閘陣列 (Field Programmable Gate Array ; FPGA)、複雜可程式邏輯 元件(Complex Programmable Logic Device ; CPLD)、特殊 應用積體電路（Application Specific Integrated Circuit ; ASIC)或數位訊號處理器（digital signai pr〇cess〇r ; dsp) 〇 而對於此種積體電路而言，其一般均設置有輸出入接腳， 例如疋一般用途輸出入接腳(general purp〇se input 〇utput ; Gn〇)等，且積體電路中也並非每一個輸出入接腳皆有被 使用’故在此實施例是透過此種積體電路剩餘未使用的輪 出入接腳’將其規劃成可以具有輸出前述邏輯準位訊號的 功能以供使用。 因此控制電路10根據上述之控制方式，可以單獨針對 ^一第二電阻的迴路是否有導通進行個別控制，且第二電 12一2的等效電轉由呈現導通迴路之第二電阻相互並聯 、、吕之控制電路1〇可以藉由控制第二電路122中第二電阻 ，的數目或是不同第二電阻之間的並聯組合，而達到控 番第-電路122的等效電阻值之大小的變化。舉例來說控制 電路1〇可以輸*低邏輯準位給所有第二電阻，故此時之第 :電路122之等效電阻值係為各第二電阻相互並聯，或是控 電路ίο輸出-高邏輯訊號給電阻R2及低邏輯訊號電阻 3、R4 ’故此時之第二電路122之等效電阻值係為電阻们 、R4相互並聯。 3 #而至於控制電路10控制分壓電路12的驅動電壓變大或 疋變小，則是根據-調光訊號來決定之，例如#控制電路 10接收到代表亮度要調亮的調光訊號時，脸制電路1〇可 以根據前述控制方式控制第二電路122的等效電阻值變大 ，反之當控制電路10接㈣代表亮度要調暗的調光訊號時 ，則控制電路10可以根據前述控制方式控制第二電路122 的等效電阻值變小。 更具體來說，控制電路1〇可以使用查表法（L〇〇k_Up Table)的方式，以找出此調光訊號所對應輸出給各第二電 阻的邏輯準位訊號，故此控制電路1〇内部可以預設一調光 對照表以儲存不同調光訊號與其相對應輸出給各第二電阻 的邏輯準㈣號之_，且此調光賴表可啸據調光訊 號的亮度予以分級，例如由亮度最暗排列到亮度最亮的順 序做排列以分成第一亮度、第二亮度…第〇亮度，且每一亮 度等級係個別對應輸出給各第二電阻使用的邏輯準位訊號 此外在第二圖所示實 阻之數量並不限定僅只有一：二電二121中的第-電 串聯、並聯或是串/並 疋由夕個第-電阻以 中的第二電阻之數旦，H ’同樣的第二電路122 來相對配置所需之二亦可以根據實際需求 以正動電壓是落在可供發光單元财 Μ亦可以直接:聯=;=實_中的發光單元 ^不導通時；= i產^驅動電壓’以供發光單元14可以正常使用。 效+請再參閱第三圖，其係為本創作第二實施例之亮度調 =¾路之不意圖。第二實施例與第一實施例主要差異在於 第一電路121a中的第一電阻係為一可變電阻VR，故在此第 二實施例下，除了可由調光訊號來控制發光單元14之發光 亮度之外，更可以藉由直接調整此可變電阻VR之阻值變化 ’來達成同樣的調光效果。此外第一電路121a中的可變電 阻VR可以進一步串聯或並聯另一電阻，以對發光單元14 提供限流保護。 再者，前述第二實施例之第一電路121a之第一電阻除 了可以是可變電阻VR亦可以是負溫度係數之熱敏電阻’以 補償發光單元Η中的發光二極體因溫度變化所造成發光特 性的偏移。當然在此第二實施例之第二電阻亦可以由一般 電阻替換成可變電阻或是正溫度係數之熱敏電阻，同樣可 以達成前述調光效果。 請再參閱第四圖，其係為本創作第三實施例之亮度調 整電路之示意圖。第三實施例與第一實施例主要差異在於 佶，過*作介面15來輸入一調光訊號供控制電路1〇判_ 元介面15是提供使用者可以直接控制發光單 八而·=操作"面15可以為按鍵介面、觸控介面或是旋叙 二二：操作介面15為按鍵介面時，此時按鍵介面可以是 定ϋ 2鍵及第二按鍵組成，並由控制電路10將第一按鍵 調暗的=調ΐ的調光訊號’以及將第二按鍵定義為輪出 觸il八肩光訊號。或是當操作介面15為觸控介面時，此時 =面可以在-觸控面板上定義有—第_觸控區及第二 調二::訊ί控制:路二將此第一觸控區定義為供輸* D s犰以將第二觸控區定義為供輸出調暗的 s。先訊號。X或是當#作介面丨5為旋齡面時，控 義此旋紐介面往第一方向（如順時鐘方向）旋轉時 :輪出調亮的調光訊號’以及定義往第二方向（如逆時鐘 方向）旋轉時係輸出調暗的調光訊號。 、’ ^對於第三實施例而言’其中的控制電路10將可根據 面ΐ5所輸出不同的調光訊號’以得知此調光訊號是 ^調受訊號或是調暗訊號，例如當控制電路職收到的 =訊號屬於調亮訊號，可再根據調光對照表將目 單元之党度等級’予以調亮一級量度，如目前發 y於第三亮度時，經過-次調亮之後即形成第二亮度之 寺級。 請再參閱第五圖，其係為本創作第四實施例 整電路之示意圖。第四實施例與第三實施例主要差昱 f設置-計時H 16以提供-計時訊號給控制電路I使和 制電路10可以根據此計時訊號判斷操作介面15是否已有: 2==而處㈣置狀態，當確讀於懸狀態時， 二=:0Γ進一步控制發光單元14以最低亮度進行 表中定義的第1可以根據調光對照 操作介先早7014之發光亮度，而當 获丄β I’有操作動作時，控制電路1G可以再计制 發光單元U恢復縣的發光亮度。 了 d人控制 整電編本創作第五實施例之亮度調 是貫補鮮—實施例主要差異在於 :用介面17可以_工作環境之變』 光訊號’例如此偵測介面17可以是光制器或電壓 首先-光偵測器作為偵測介面1?舉例說明，由於光偵 =可以㈣環境周圍亮度之變化，故對於控制電路10而 2可以根據光偵測器之侧結果得知環境亮度是否過亮 士2 ’紅可以相對控制發光單元14之發衫度可以變 7C或變暗。 再以f壓制H作為侧介面17舉例說明，由於電 壓偵測器可以偵測提供電路使狀電源電壓之變化，故對 於控制電路1G而言亦可錄據電壓_11之_結果得知 目前使用之4電壓是^正常或過偏低，並且可以相對控 制發光單元14之發光亮度可以在工作電壓偏低時相對變暗 ’藉以節省電源之消耗。 請再參閱第七圖，其係為本創作第六實施例之亮度調 整電路之示意圖。第六實_與第—實施取要差異在於 是增設-接腳擴充模組18，藉以擴增控制電路_則吏用 之接聊數量’而此接腳擴充模組18是_於控制電路職 分壓電路12之I更具體來說，控制電路1()為了可以順利 透過接腳擴充模㈣來對分壓電路12之轉電壓進行控制 ，控制電路10與接腳擴充模組18之間是透過雙方可辨^之 =定，以進行控制命令及資料之傳輸，例如此接腳擴 充t且18可以是輸出人埠忙（如82551〇,以使控制電路1〇 可以順利完成上述之操作。 上述所揭露亮度調整電路之各種實施例，其實 ，可以應驗具有發光魏之各_錄電子產品，例如 明、指示等相關電子產品中，亦或是用在顯 不裝置中的背光源中。 制發^上所述，賴作是透健觀㈣分壓方式來控 葬由2:所使用驅動_之大小’所使用之控制方式是 ‘出二♦ A路配合—分壓電路即可達成，並由控制電路以 〜方式來控制分壓電路中電阻值之變化，且藉由 ^電^中電阻值改變之結果，即可使分壓電路輸出供發 早^❹之卿電壓具有變化之效果，而最終使發光單 ::3::根據接收到不同的驅動電壓以呈現變亮或變 之創作之觀方式，無需#助於任何供光源使用 的積體電裝卜般均有的可程式化 體電子* w 制核*，如此料方式可以降低整 ^之電流消耗，而有助於環保省電，且亦可使整 創；成本更為降低，而増加產品競爭力。此外本 路架;之:計手動或自動方式來進行’使電 更/、彈性，而得以應用到不同的使用場 M376097 合。 惟，上述所揭露之圖式、說明，僅為本創作之實施例 而已，凡精于此項技藝者當可依據上述之說明作其他種種 之改良，而這些改變仍屬於本創作之發明精神及以下所界 定之專利範圍中。 【圖式簡單說明】 第一圖係為習知LED驅動電路之示意圖； 第二圖係為本創作第一實施例之亮度調整電路之示意圖； 第三圖係為本創作第二實施例之亮度調整電路之示意圖； 第四圖係為本創作第三實施例之亮度調整電路之示意圖； 第五圖係為本創作第四實施例之亮度調整電路之示意圖； 第六圖係為本創作第五實施例之亮度調整電路之示意圖； 第七圖係為本創作第六實施例之亮度調整電路之示意圖。 【主要元件符號說明】 10 控制電路 12、12a 分壓電路 121 、 121a 第一電路 122 第二電路 14 發光單元 15 操作介面 16 計時器 17 偵測介面 18 接腳擴充模組 8 處理器 9 驅動電路 90 調光控制模組 92 電流槽彳吴組 94 電荷泵模組 12Please refer to the second figure for a schematic diagram of the A circuit. Brightness adjustment circuit! The luminance adjustment circuit 12 of the first embodiment includes a control circuit 10 and a voltage division=to: the voltage divider circuit 12 is provided with a variable 祀 unit 14 ′ such that the luminance of the illumination unit 14 can be: Voltage V - exhibits different brightness. The light-emitting unit 14 includes a first circuit 121 and a second circuit 121 in series, parallel or series/parallel, and the first circuit 121 and the second circuit 122 are connected in series. The first electric circuit includes a -first-resistor such as an electric ring; the second circuit 122 includes = a plurality of second resistors such as electric aR2, R3, and R4, and one end of each of the second resistors is lightly connected to the first-resistance One end 'and the other end of each second resistor = control circuit 10', that is, the second resistors are connected in parallel with each other. Therefore, when a power supply voltage (VCC) is supplied to the voltage dividing circuit 12, the power supply voltage is divided by M376097 by a resistor used in the first circuit 121 and the second circuit 122, thereby obtaining a The driving voltage v(10) is obtained by multiplying the power supply by the equivalent resistance value of the first circuit 122 / (the equivalent resistance value of the first circuit plus the equivalent resistance value of the second circuit). Therefore, it can be seen from the above dust separation formula that the driving voltage v〇m can be changed by changing the equivalent resistance value of the first circuit 121 and/or the second electric circuit 122, so that the embodiment is mainly for the effect of the Dyna technology. The control circuit 1 is used to control the equivalent resistance value of the second circuit 122. The control circuit 10 outputs a logic level signal to each of the second resistors: the logic level signal. It can be a high logic level (Logic Hi) signal or a low logic level (Logic Low) signal. More specifically, when the second resistor receives the high logic level signal, the second resistor cannot form a conduction loop, and when the first resistor receives the low logic level signal, a conduction loop is formed. The trace control circuit 10 is mainly a programmable integrated circuit, such as a microprocessor, a microcontroller, a Field Programmable Gate Array (FPGA), and a complex programmable logic component ( Complex Programmable Logic Device (CPLD), Application Specific Integrated Circuit (ASIC) or digital signai pr〇cess〇r (dsp), and for such integrated circuits, Output pins are provided, for example, general-purpose output pin (genen purp〇se input 〇utput; Gn〇), etc., and not every output pin is used in the integrated circuit. This embodiment is designed to have the function of outputting the aforementioned logic level signal for use by using the remaining unused wheel-in and out pins of the integrated circuit. Therefore, according to the above control manner, the control circuit 10 can individually control whether the circuit of the second resistor is conductive or not, and the equivalent electrical rotation of the second power 12-2 is paralleled by the second resistors presenting the conduction loop. The control circuit 1 can control the change of the equivalent resistance value of the control circuit 122 by controlling the number of the second resistors in the second circuit 122 or the parallel combination between the different second resistors. . For example, the control circuit 1 can input the low logic level to all the second resistors. Therefore, the equivalent resistance value of the circuit 122 is that the second resistors are connected in parallel with each other, or the control circuit ίο output-high logic The signal is given to the resistor R2 and the low logic signal resistors 3, R4'. Therefore, the equivalent resistance value of the second circuit 122 at this time is the resistors and the R4 are connected in parallel with each other. 3# As for the control circuit 10 controlling the driving voltage of the voltage dividing circuit 12 to become larger or smaller, it is determined according to the dimming signal, for example, the # control circuit 10 receives the dimming signal indicating that the brightness is to be brightened. When the face circuit 1〇 can control the equivalent resistance value of the second circuit 122 to be larger according to the foregoing control manner, when the control circuit 10 is connected to the (4) dimming signal indicating that the brightness is to be dimmed, the control circuit 10 can be according to the foregoing. The control mode controls the equivalent resistance value of the second circuit 122 to become small. More specifically, the control circuit 1〇 can use the look-up table method (L〇〇k_Up Table) to find the logic level signal corresponding to the output of the dimming signal to each second resistor, so the control circuit 1〇 A dimming reference table may be preset to store different dimming signals and corresponding logic outputs (4) corresponding to the second resistors, and the dimming table may be classified according to the brightness of the dimming signals, for example, Arranged from the darkest brightness to the brightest brightness to be divided into the first brightness, the second brightness, the second brightness, and each brightness level is individually output to the logic level signal used by each second resistor. The number of real resistances shown in the second figure is not limited to only one: the first electric series, the parallel connection, or the serial/parallel number of the second electric two-electricity 121, the second resistance of the second electric resistance, H 'The same second circuit 122 to the relative configuration required can also be based on the actual demand, the positive voltage is falling on the available light-emitting unit, or directly: the light-emitting unit in the real = _ is not turned on ;= i production ^ drive voltage 'for the light single 14 can be used normally. Effect + Please refer to the third figure, which is the intention of the brightness adjustment = 3⁄4 way of the second embodiment of the present invention. The main difference between the second embodiment and the first embodiment is that the first resistor in the first circuit 121a is a variable resistor VR. Therefore, in the second embodiment, the illumination of the light-emitting unit 14 can be controlled by the dimming signal. In addition to the brightness, the same dimming effect can be achieved by directly adjusting the resistance change of the variable resistor VR. Further, the variable resistor VR in the first circuit 121a may further be connected in series or in parallel with another resistor to provide current limiting protection to the light emitting unit 14. Furthermore, the first resistor of the first circuit 121a of the second embodiment may be a negative temperature coefficient thermistor ′ in addition to the variable resistor VR to compensate for the temperature change of the light-emitting diode in the light-emitting unit Η. Causes a shift in luminescence characteristics. Of course, the second resistor of the second embodiment can also be replaced by a resistor or a positive temperature coefficient thermistor, and the aforementioned dimming effect can also be achieved. Please refer to the fourth figure, which is a schematic diagram of the brightness adjustment circuit of the third embodiment of the present invention. The main difference between the third embodiment and the first embodiment is that the interface 15 is used to input a dimming signal for the control circuit 1 to judge _ the interface 15 is to provide the user with direct control of the illumination single eight and the operation " The surface 15 can be a button interface, a touch interface or a narration 22: when the operation interface 15 is a button interface, the button interface can be composed of a ϋ 2 button and a second button, and the control circuit 10 will be the first The button dims the = dimming dimming signal ' and the second button is defined as the wheel il s shoulder light signal. Or when the operation interface 15 is a touch interface, the surface can be defined on the touch panel - the first touch area and the second second change:: control: the second touch The zone is defined as the input * D s 犰 to define the second touch zone as s for output dimming. First signal. X or when the interface 丨5 is the rotation surface, when the control interface rotates in the first direction (such as clockwise direction): turn the dimming signal of the brightening and define the direction to the second direction ( When rotated in the reverse clock direction, it outputs a dimmed dimming signal. For the third embodiment, the control circuit 10 will output different dimming signals according to the area ΐ5 to know whether the dimming signal is a signal or a dimming signal, for example, when controlling The = signal received by the circuit is a brightening signal, and the party level of the target unit can be adjusted according to the dimming table. If the current brightness is y at the third brightness, after the second time, Form the second brightness of the temple level. Please refer to the fifth figure, which is a schematic diagram of the entire circuit of the fourth embodiment of the present invention. In the fourth embodiment and the third embodiment, the main difference f is set-timed H 16 to provide a timing signal to the control circuit I. The circuit 10 can determine whether the operation interface 15 is already present based on the timing signal: 2== (4) Set state, when it is read in the suspended state, two =: 0 Γ further control of the light-emitting unit 14 with the lowest brightness, the first one defined in the table can be based on the dimming control operation, the light-emitting brightness of the early 7014, and when the 丄β is obtained When I' has an operation operation, the control circuit 1G can calculate the light-emitting unit U to restore the brightness of the county. The brightness adjustment of the fifth embodiment of the invention is the same. The main difference is that the interface 17 can be used to change the working environment. For example, the detection interface 17 can be optical. The first voltage detector is used as the detection interface 1 . For example, since the light detection can change the brightness around the environment, the control circuit 10 can know the ambient brightness according to the side of the photodetector. Whether it is too bright 2 'red can relatively control the light-emitting unit 14's hairpin degree can be changed to 7C or darken. Taking the F as the side interface 17 as an example, since the voltage detector can detect the change of the voltage of the supply circuit, the control circuit 1G can also record the voltage _11. The voltage of 4 is normal or too low, and the relative brightness of the light-emitting unit 14 can be relatively darkened when the operating voltage is low, thereby saving power consumption. Please refer to the seventh figure, which is a schematic diagram of the brightness adjustment circuit of the sixth embodiment of the present invention. The difference between the sixth real_and the first implementation is that the add-pin expansion module 18 is used to amplify the control circuit _ the number of connections used, and the pin expansion module 18 is _ control circuit More specifically, the control circuit 1 () controls the voltage of the voltage divider circuit 12 to smoothly pass through the pin expansion module (4), and the control circuit 10 and the pin expansion module 18 The control command and data transmission can be performed by both parties, for example, the pin expansion t and 18 can be the output person busy (such as 82551〇, so that the control circuit 1 can successfully complete the above The various embodiments of the brightness adjustment circuit disclosed above can be used in a related electronic product such as a light, an indication, or the like, or in a backlight in a display device. The system is based on the above-mentioned method. The control method is used to control the burial by 2: the size of the driver used. The control method used is '2 ♦ A-way matching-dividing circuit Can be achieved, and the control circuit uses a ~ way to control the partial pressure The change of the resistance value in the circuit, and the result of the change of the resistance value in the ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ : According to the way of receiving different driving voltages to show the brightening or changing of the creation, there is no need to help any programmable electric electrons* such as the integrated electrical equipment used for the light source, so The material method can reduce the current consumption of the whole ^, and contribute to environmental protection and power saving, and can also make the whole creation; the cost is further reduced, and the product competitiveness is added. In addition, the road frame; the manual or automatic method is adopted. 'Make the electricity more / flexible, and can be applied to different use fields M376097. However, the above-mentioned drawings and descriptions are only examples of the present creation, and those skilled in the art can The description is made in various other modifications, and these changes still belong to the inventive spirit of the present invention and the patent scope defined below. [Simplified description of the drawings] The first figure is a schematic diagram of a conventional LED driving circuit; First creation for this creation The schematic diagram of the brightness adjustment circuit of the second embodiment is a schematic diagram of the brightness adjustment circuit of the second embodiment of the present invention; the fourth figure is a schematic diagram of the brightness adjustment circuit of the third embodiment of the present invention; A schematic diagram of the brightness adjustment circuit of the fourth embodiment is created; the sixth figure is a schematic diagram of the brightness adjustment circuit of the fifth embodiment of the present invention; and the seventh figure is a schematic diagram of the brightness adjustment circuit of the sixth embodiment of the present invention. Element Symbol Description 10 Control Circuit 12, 12a Voltage Dividing Circuit 121, 121a First Circuit 122 Second Circuit 14 Light Emitting Unit 15 Operation Interface 16 Timer 17 Detection Interface 18 Pin Expansion Module 8 Processor 9 Drive Circuit 90 Dimming control module 92 current slot 彳 组 group 94 charge pump module 12