1258872 九、發明說明： 【發明所屬之技術領域】 本發明是有關於一種使發光二極體（LED)輸出固定A产 之方法，特別是指一種利用預估法使高亮度發光二極體2 出固定亮度之方法。 Μ 【先前技術】 隨著製造技術的進步，發光二極體的使用已經從單純 的指示用途轉變成具有取代燈泡的照明功能，如行動電話 、個人數位助理機（PDA)的背光、室内照明燈、手電筒、車 燈等等。 目前控制高亮度發光二極體的方式主要有定電壓與定 電流兩種。 如圖1，定電壓係將高亮度發光二極體11串聯一限流 電阻12，再於電路的兩端加上定電壓之電源，以驅動高亮 度發光二極體11發光。定電壓係成本最低的方式，然而， 限流電阻12會限制通過的電流，與高亮度發光二極體u非 線性的ν·ι曲線’使得定電壓方式的穩流效果非常差。如圖 2’隨著高亮度發光二極體u的電流工的增加，其輸出亮度 a.u.亦隨之增加，致使採用定電壓方式無法固定高亮度發光 二極體輸出亮度。 阿免度發光二極體在長時間使用一段時間後溫度會大 幅增高’會影響高亮度發光二極體11的特性，如使高亮度 發光二極體u的正向電壓VF隨之變化，進而導致高亮度 發光二極體u的電流隨溫度的增加而攀高與輸出亮度增加 5 1258872 Π亮度發光二極體u的電流若失控，高亮度發光二極 ^性^=作在大電流下料響高亮度發光二極體η的 罪生人奇命並可能故障。 二極：：’二前亡都使用定電流的方式來驅動高亮度發光 a ，才日瓖向亮度發光二極體11的電_ 6 僅可使鈐屮古命η 般Π的電飢固&，如此不 人即&又古疋’且可增加高亮度發光二極體11的使 =。目前定電流的控制方法是採用迴授法來控制高亮 又务光一極體u的電流量。 拿 古 f、田木况，如圖3，係透過一 連接间冗度發光二極體模組u’之電流電壓轉換模組12，， 以“μ發光二極體模組u，之電流轉換訊號後，饋 二極體模組η，的電流，達到定電=:至心度發光 處理器’而為接收來自電流電屢轉換模組12，之電1258872 IX. Description of the Invention: [Technical Field] The present invention relates to a method for making a light-emitting diode (LED) output fixed A, and particularly to a high-brightness light-emitting diode 2 by using a prediction method A method of fixing the brightness. Μ [Prior Art] With the advancement of manufacturing technology, the use of light-emitting diodes has changed from a simple indication use to a lighting function with a replacement bulb, such as a mobile phone, a personal digital assistant (PDA) backlight, indoor lighting , flashlights, lights, and more. At present, there are two main methods of controlling the high-brightness light-emitting diodes: constant voltage and constant current. As shown in Fig. 1, the constant voltage system connects the high-intensity light-emitting diode 11 in series with a current limiting resistor 12, and then supplies a constant voltage power supply to both ends of the circuit to drive the high-brightness light-emitting diode 11 to emit light. The constant voltage is the lowest cost method. However, the current limiting resistor 12 limits the current passing through, and the non-linear ν·ι curve of the high-brightness light-emitting diode u makes the steady-state current stabilization effect very poor. As shown in Fig. 2', as the current of the high-brightness light-emitting diode u increases, the output brightness a.u. also increases, so that the brightness of the high-brightness light-emitting diode cannot be fixed by the constant voltage method. The temperature of the A-free light-emitting diode will increase greatly after a long period of use, which will affect the characteristics of the high-brightness light-emitting diode 11, such as changing the forward voltage VF of the high-brightness light-emitting diode u. The current causing the high-brightness light-emitting diode u increases with the increase of temperature and the output brightness increases. 5 1258872 Π If the current of the brightness light-emitting diode u is out of control, the high-brightness light-emitting diode is used to make a high current. The sin of the high-brightness light-emitting diode η is strange and may malfunction. Two poles:: 'The two former deaths use a constant current method to drive high-brightness illumination a, and then the light to the brightness of the LEDs 11 to the brightness of the diodes _ 6 can only make the ancient η Π Π 电 电 电 &;, so unintentional & and ancient and can increase the brightness of the high-brightness light-emitting diode 11 =. At present, the control method of the constant current is to use the feedback method to control the amount of current of the highlight and the light body. Take the ancient f, the field of wood, as shown in Figure 3, through a connection between the redundancy of the light-emitting diode module u' of the current-voltage conversion module 12, with "μ LED module u, the current conversion After the signal, the current of the diode module η is reached, and the power is reduced to: the heart rate illuminating processor is received.
差Λ諕’控制器13,内需整合-類比數位轉換器(AD _則叫將電龍號數位化，使得控制器13，的成本較高。 时但，由於迴授法需使用價位較高之内含類比數位轉換 :之控制器u’與電虔電流轉換模組12，，所需成本甚高於 定電屡的控制方法，造成微利時代的廠商過大的成本麼力 。因此’如何降低定電流控制方法所需成本成為業者的努 力重點。 【發明内容】 本發明之目的，即在提供-種成本較低之使高亮度發 光二極體輸出固定亮度之方法。 於是，本發明使高亮度發光二極體輸出固定亮度之方 6 1258872 ^，係由-控制器來驅動一高亮度發光二極體模組，該高 ^發光二極體模組具有至少一高亮度發光二極體，該控 讀存該咼亮度發光二極體模組工作時電流與時間間的 電抓資汛，該方法係包含以下步驟： ▲(乂輸出—驅動電力至該高亮度發光二極體模組並開 _ 料數該高亮度發光二極體模組的作時間；及 士（Β)依據該電流資訊與該高亮度發光二極體模組之工 • 料間來適時調整輸出至該高亮度發光二極體模組的該驅 動電力之電流量，使該高亮度發光二極體模組的電流穩定 〇 【實施方式】 有關本發明之前述及其他技術内容、特點與功效，在 以下配口茶考圖式之一個較佳實施例的詳細說明中，將可 清楚的呈現。 有鑑於迴授法之定電流控制所費成本不貲，本案發明 • 人思及改用預估法來作定電流控制。詳細來說，如圖4，即 使提供固定值之電源予高亮度發光二極體，高亮度發光二 極體之電流量隨工作時間的增加而變化。此高亮度發光二 極體能容忍的最大連續工作電流為5〇〇mA，所需電力係由 -電池供應。當開始供電至高亮度發光二極體時，因為高 亮度發光二極體的溫度快速上升，導致電流的急速增大， 且有部卩時間m超過高亮度#光二極體的最大連續工 作電流，使壳度極劇變化，之後因溫度接近平衡而電流不 再上升，但因短時間電池消耗大部分電流，所以所剩電力 7 J258872 減少較快’之後電流較無法維持，亮度減少較伊。 …由於^度發光二極體模組之電流與工作 流資汛，如圖4，可利$ |j θ 3的電 j才彳用事先量測取得。因此， 估法即是利用電流資訊來 以明之預 ，使其穩定而可輸出固定亮度。 電机Ϊ 配合圖5，本發明中實 真产之方半見使回冗度發光二極體輸出固定 儿度之方法較佳貫施例的架構係具有—控制器2、 發光二極體模組3盥一 &> 阿冗度 有至，卜古1 ” u'4°⑽度發光二極體模組3且 有至）一南壳度發弁— ^ 雷、m你 —極體’而氣源4係提供控制器2盥 電源4工作所需之電力。 控制器2係一肉淨士 > & 、 5己彳思體與計時器之微處理器，其 先接收電源4所提供的雷六 八 一丄 的電力並經處理成一驅動電力傳送至 南凴度發光二極體槎έ 1 ^組3。控制器2依照高亮度發光二極體 极、、且3 ,又叶所需產生 儿反木决疋驅動電力之初始電流 值，如亮度為1 15 士 > > — · Τ，鬲壳度發光二極體模組3所需電 流為400mA，控制哭9 y么人 口口 ^々驅動電力輸出至高亮度發光二 極體模組3的固；μ & / 疋電机值為400mA。有別於習知，本實施 例之控制器2内儲在古古古命义 ^ ， 燔存有阿冗度發光二極體模組3之電流資 訊：二成的程式或表格。控制器2 —旦開始供給驅動電力 至向免度^光二極體模組3 ’控制器2内部的計時器開始計 :時間’指高亮度發光二極體模組3工作而發光的時間， 控^ 2依據計數時間與電流資訊來適時調整驅動電力之 電*里’使冋党度發光二極體模组3的電流穩定。舉例來 當高亮度發光二極體模組3工作之初，為彌補高亮度 8 ^^«872 極體模組3因溫度上升而突增的電流，控制器2會 週日可調降驅動雷六夕φ、、六旦 的雷、古 /爪里’使高亮度發光二極體模組3 輪出':維持穩定，如圖6，致使高亮度發光二極體模組3的 則出冗度亦可固定。 ，據前述架構與相互間的關係、，配合圖7，本實施例之 盥你先在^驟51中’將高亮度發光二極體模組3之電流 /内乍時間間的電流資訊以程式或表格方式儲存於控制器2 純，當欲控制高亮度發光二極體模組3輸出一預設 =二，在步驟52’控制器2利用電源4所提供的電力來 動電力至高亮度發光二極體模組3,此驅動電力之 亮度對應。此時，控制器2内部的計時器亦 «幵。4數㈣度發光二極體模組3的工作時間。 士取後S步驟53中，控制器2會依據電流資訊與工作 日守間來調整驅動雷力夕雷、、六θ _ 動電力之電"…使高亮度發光二極體模組3 患又，如圖6 ’依據本實施例之方法控制時的高亮度發光二 極體模組3的電流相較於電流資訊更為穩定，致使高亮度 模，组3 :亮度?可固定，進而避免高亮度發光 "3的可靠度與壽命因大電流而受影響。在本· 施例中控制器2係應用脈衝寬度調變（pwM)來調整驅動二 力之負載週期（Dmy cycle)，以改變驅動電力之平均電流。 又’熟習該項技藝者當知，控制器2亦可應用類比 調整驅動電力之電流，並不受限於本實施例所揭露。 據前所述，本發明確實可利用預估法來控制高亮度發 9 1258872 光二極體模組3輸出固定亮度。如此，本發明方法所採用 制A 2 ；f需内建類比至數位轉換器且亦無須搭配 電壓轉換模組，致使元件成本可大幅降低，以達到較低^ 本來以定電流方式控制高亮度發光二極體模組3之功效 惟以上所述者，僅為本發明之較佳實施例而已，當不 能以此限定本發明實施之範圍，即大凡依本發明申請&利 範圍及發明說明内容所作之簡單的等效變化與修飾，皆仍 屬本Is明專利涵蓋之範圍内。 【圖式簡單說明】 圖1是一種習知以定電壓控制高亮度發光二極體的電 路示意圖； 图2疋南冗度發光^一極體的電流與免度關係圖； 圖3是一種習知以迴授法之定電流控制高亮度發光二 極體模組之示意圖； 圖4疋提供固定電流至局亮度發光二極體模組後，高 允度發光二極體模組之電流與工作時間的關係圖； 圖5是實現本發明使高亮度發光二極體輸出固定亮度 之方法較佳實施例的架構示意圖； 圖6是應用本實施例後的高亮度發光二極體模組之電 流與工作時間的關係圖；及 圖7是本實施例的流程圖。 10 1258872 【主要元件符號說明】 2控制器 3高亮度發光二極體模組The difference controller 13, the internal demand integration-analog digital converter (AD _ is called the digital number of the electric dragon, so that the cost of the controller 13, is higher. However, due to the feedback method, the price is higher. The analog analog digital conversion: the controller u' and the electric current conversion module 12, the cost required is much higher than the control method of the constant power, which causes the manufacturer of the meager profit era to have too much cost. Therefore, how to reduce the The cost required for the current control method has become an important point of efforts of the industry. SUMMARY OF THE INVENTION The object of the present invention is to provide a method for outputting a fixed brightness of a high-intensity light-emitting diode with a low cost. Thus, the present invention enables high brightness. The light-emitting diode outputs a fixed brightness of 6 1258872 ^, which is driven by a controller to drive a high-brightness light-emitting diode module having at least one high-brightness light-emitting diode. The method of reading and storing the current and time between the brightness and light-emitting diode modules comprises the following steps: ▲ (乂 output - driving power to the high-brightness light-emitting diode module and opening _ The number of materials is high The time of the brightness LED module is adjusted according to the current information and the work of the high-intensity LED module to adjust the output to the high-intensity LED module. The amount of current of the driving power stabilizes the current of the high-intensity light-emitting diode module. [Embodiment] The foregoing and other technical contents, features and effects of the present invention are compared with one of the following tea-based patterns. In the detailed description of the preferred embodiment, it will be clearly presented. In view of the cost of the current control in the feedback method, the invention is invented and the prediction method is used to determine the current control. In detail, 4, even if a fixed-value power source is supplied to the high-brightness light-emitting diode, the current amount of the high-brightness light-emitting diode varies with the working time. The maximum continuous operating current that the high-brightness light-emitting diode can tolerate is 5〇. 〇mA, the required power is supplied by the battery. When the power supply to the high-brightness light-emitting diode is started, the temperature of the high-brightness light-emitting diode rises rapidly, causing a rapid increase in current, and there is a part The time m exceeds the maximum continuous operating current of the high-brightness light photodiode, so that the shell degree changes drastically, and then the current does not rise because the temperature is close to equilibrium, but the battery consumes most of the current in a short time, so the remaining power is reduced by 7 J258872. After the faster 'after the current is less able to maintain, the brightness is reduced compared to Iraq. ... Because of the current and workflow resources of the LED module, as shown in Figure 4, the power of $ | j θ 3 can be used in advance. Therefore, the estimation method uses the current information to make it stable and can output a fixed brightness. Motor Ϊ In conjunction with Figure 5, the actual production of the invention is half-baked. The method of selecting the fixed body of the polar body is preferably the architecture of the embodiment having the controller 2, the LED module 3盥一&> A redundancy degree, Bugu 1 ” u'4° (10) The light-emitting diode module 3 has a south shell-shaped hairpin - ^ mine, m you-pole body and the gas source 4 system provides the power required for the controller 2 to operate the power source 4. The controller 2 is a microprocessor of the meat >& 5, the body and the timer, which first receives the power of the lightning power provided by the power source 4 and is processed into a driving power transmission to the south. Twisted light-emitting diodes 槎έ 1 ^ group 3. The controller 2 generates the initial current value of the driving power according to the high-brightness light-emitting diode pole, and 3, and the leaf, such as the brightness of 1 15 士 > > - Τ, 鬲 度The current required for the LED module 3 is 400 mA, and the power is output to the high-brightness LED module 3; the μ & / 疋 motor value is 400 mA. Different from the conventional knowledge, the controller 2 of this embodiment is stored in the ancient ancient ancient meaning ^, and there is a current information of the redundancy LED module 3: a program or a table of 20%. The controller 2 starts to supply the driving power to the timer of the controller 2 inside the controller 2: the time ' refers to the time when the high-brightness LED module 3 works and emits light, and controls ^ 2 According to the counting time and current information, the electric power of the driving power is adjusted in time to make the current of the LED module 3 stable. For example, when the high-brightness LED module 3 is working, in order to make up for the sudden increase of the current of the high-brightness 8^^«872 polar body module 3 due to temperature rise, the controller 2 will adjust the driving speed on Sunday.夕 φ, , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , Can also be fixed. According to the foregoing architecture and relationship with each other, with reference to FIG. 7, in this embodiment, you first set the current information between the current/inside time of the high-brightness LED module 3 in the program 51. Or the table mode is stored in the controller 2 pure, when the high-brightness light-emitting diode module 3 is to be controlled to output a preset=2, in step 52', the controller 2 uses the power provided by the power source 4 to move the power to the high-brightness light-emitting diode 2 The polar body module 3 corresponds to the brightness of the driving power. At this time, the timer inside the controller 2 is also «幵. The working time of the 4-digit (four-degree) light-emitting diode module 3. After the step S is taken in step S, the controller 2 adjusts the driving force of the lightning force according to the current information and the working day to control, and the electric power of the six θ _ dynamic electric power is high-luminance LED module 3 Moreover, the current of the high-brightness light-emitting diode module 3 controlled by the method according to the embodiment of FIG. 6 is more stable than the current information, so that the high-brightness mode, group 3: brightness can be fixed, thereby avoiding The reliability and lifetime of high-brightness illumination "3 are affected by high current. In the present embodiment, the controller 2 applies pulse width modulation (pwM) to adjust the duty cycle (Dmy cycle) for driving the two forces to change the average current of the driving power. Further, it is known to those skilled in the art that the controller 2 can also apply an analogy to adjust the current of the driving power, and is not limited to the embodiment. According to the foregoing, the present invention can indeed use the prediction method to control the output brightness of the high-brightness 9 1258872 optical diode module 3. Thus, the method of the present invention uses A 2 ; f requires built-in analog to digital converter and does not need to be matched with a voltage conversion module, so that the component cost can be greatly reduced to achieve a lower level. The effect of the diode module 3 is only the preferred embodiment of the present invention, and the scope of the invention is not limited thereto, that is, the application and the scope of the invention and the description of the invention are The simple equivalent changes and modifications made are still within the scope of this Is patent. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic diagram of a conventional circuit for controlling a high-brightness light-emitting diode with a constant voltage; FIG. 2 is a diagram showing the relationship between the current and the degree of immunity of the southmost illuminating body; FIG. A schematic diagram of a high-intensity light-emitting diode module controlled by a current-receiving method; FIG. 4疋 provides a current and a working time of a high-accuracy light-emitting diode module after a fixed current is supplied to the local brightness light-emitting diode module. FIG. 5 is a schematic structural diagram of a preferred embodiment of a method for implementing a high-intensity light-emitting diode output fixed brightness according to the present invention; FIG. 6 is a current and operation of a high-brightness light-emitting diode module after applying the embodiment. A diagram of time; and Fig. 7 is a flow chart of the embodiment. 10 1258872 [Key component symbol description] 2 controller 3 high brightness LED module