M322891 八、新型說明 【新型所屬之技術領域】 本創作有關於車用發光二極體之驅動電路，以近光燈或儀表 板燈之電氣訊號為控制訊號，將車用發光二極體之驅動電流視需 要分段成為兩種，在白晝時可以較高之驅動電流驅動之，在夜晚 時則以另一種較低之額定電流加以媒動，以延長其壽命。M322891 VIII. New description [New technical field] This creation has a driving circuit for a light-emitting diode for a vehicle. The electric signal of the low beam or the instrument panel light is used as a control signal, and the driving current of the LED for the vehicle is used. It can be segmented into two types as needed. It can be driven by a higher driving current in daylight and at a lower current rating in the night to extend its life.
【先前技術】 發光二極體(LED)乃利用ΙΠ-ν族化合物半導體材料製作而 成’具有能帶直接躍遷，包括所有可能可見光區域⑽〜彻咖)的 發光範圍，良好結晶品質，有價廉大0徑單結晶基板等優點。自 1970年左右開始，即用於指*燈 '數字顯示元件等，❿目前應用 領域已愈來錢。發光二鋪可在低電壓、低電流下驅動（消耗電 力，匕，具有小型化實裝密度高之特徵。也因為可見光發光二極體 之高亮度趨勢，目前正朝向以發光二極體取代電燈泡、汽車煞車 燈’父通號絲及高速公路的指轉等戶外細躺發展。又因 低電流下具局党度之故，發光二極體齡元件可利肖IC直接驅 動。另外，在OA機器領域上，例如傳真機及影印機、印表機所用 綠色發光-極體光源等高輸出化產品皆已應用。利用發光二極體 的回速性與同焭度之特長，作為娜光纖短距離先通信用光源 等，應用範圍由以往的指示燈擴展到非常廣泛的領域。 【新型内容】 就發光二顏發展歷史而言，首先明獅遷獅㈣發光二 極體實現了紅、黃、綠色的發光，·由於結晶減技術、元件化程 序技術、組裝技術等量產_的開發，已經促進價格低廉化。現 4 M322891 今，發光二極體之短波長藍色發光二極體產製工作，正在台灣各 :究機關及企業中進行，而㈣請料為主要對象，此材料之高 献化及白光化，都毅期盼。近年來在藍色發光二極體的實用 化方面之進步，使紅、綠、藍等三原色的全色細示變為可行， 在薄型掛壁式電視等應用領域上，急速地擴大。 也正由於近來發光二極體被大量地使用於車用電子上，一般而 曰’發光二極體壽命越長越能減少更換之時間（次數），相對而 ' 言，車用訊號使用發光二極體在影響大眾生活及安全上更有其優 ，越之特1± 般之發光二極體有其*命之限制，尤其在額定的 操作電流，例如2〇毫安培以下，其將有特定之壽命，例如工作 5000小時。我們如果能將這發光二極體之操作電流，酌予下降， 例如15笔女培，其壽命便可延長至兩倍以上例如工作loooo 士時。另一方面，由於背景光源之影響，在白天時候，訊號指 示屑要相g之焭度加強以符合辨識需求。但在夜晚時同樣強度 之燈光，不但發光，而且往往發出之強度超出了所需要之對比的 光，看起來還會份外地刺眼，反而不易辨識，那便是由於背景光 麵源有無所造成的關係；因在夜晚時沒有太陽光線之對比下，其 燈光便顯得突出而甚至於到達刺眼的地步。於是在夜晚時我們應 可酌予降低其操作電流，一則可使其燈光變為更柔和清析，二 則:使其壽命延長。因此，综合以上，本案相較於現有之單一 額疋電流的驅動電路而言，使其燈光變為更柔和、有延長其壽命、 及節約能源等諸多好處。 以在也有若干類似構想，例如同為創作人之TW551777號 案’但是其控制訊號來源為一感測器或是計時器等(如GPS訊號）， 但疋由於車用系統競爭激烈；增加感光器或是計時器，將增加成 5 .M322891 本，並且感光器會有失效之顧慮；影響行車安全，於是在此提出 以車内儀表板或是近光燈之訊號為控制訊號新型專利之申請。為 讓本創作之上述和其他目的、特徵、和優點能更易懂下文特舉 較佳實施例，並配合所附圖式，作詳明如下： 【實施方式】 如圖一所示，其乃一發光二極體之體整驅動電路方塊圖， 由此圖中可看出，如果我們將發光二極體驅動電路以一麗控電流 龜源電路30構成，發光二極體驅動操作之電流便可有效地受^電壓 ^ 控制單元20所產生之控制訊號所控制。以往也有若干類似構想， f是其控制訊號來源為一感測器或是計時器等(如GPS訊號），^ 疋由於車用系統競爭激烈，增加感光器將增加成本，並且感光器 會^失效之顧慮；影響行車安全，於是本創作以車内儀表板或是 近光燈之訊號為控制訊號，燈光之啟閉由用車人來決定，當用車 人亡得天色暗時，開近光燈或儀表燈或是小燈時，就表示車内各 極體相關電路可以減光。例如對車用直流訊號而言，燈號感 7單70 10感測到燈號之有無信號Va，而送出較低電壓或較高電壓 ， ^ ’來調整壓控電流源電路30，以驅動發光二極體。也可為直流 無路，燈號單元10感測到車内儀表板或是近光燈之訊號之有 …^號Va’而送出較低時脈或較高時脈Vb，來調整壓控電流源電 路30 ’以驅動發光二極體。 乃一發光二極體驅動之壓控電流電路圖之圖示，由此圖中可 出，Vb經由R6' C1及R7去除高頻雜訊後，送交Q3、Q4所組成 之達靈頓電路以適量地操作電流驅動發光二極體。 本創作有關於車用發光二極體之驅動電路，以近光燈或儀表板燈 6 M322891 之電氣訊號為控制訊號，將車用發光二極體之驅動電流視需要分 段成為兩種，在白晝時可以較高之驅動電流驅動之，在夜晚時則 以另一種較低之額定電流加以驅動，以延長其壽命。 雖然本創作已以較佳實施例揭露如上，然其並限定本創作，任何 熟習此技藝者’在不脫離本創作和範圍内，當可作各種之更動與 ， 潤飾，因此本創作範圍當視後附之申請專利範圍所界定者為準。 M322891 【圈式簡單說明】 圖一 車用發光二極體整體驅動電路方塊圖。 圖二 車用發光二極體驅動之壓控電流電路圖。 【元件圖號說明】[Prior Art] A light-emitting diode (LED) is made of a ΙΠ-ν compound semiconductor material and has a light-emitting range with a direct energy transition, including all possible visible light regions (10) to a coffee, good crystal quality, and a price. Lianda 0-diameter single crystal substrate and other advantages. Since about 1970, it has been used to refer to *lights' digital display components, etc., and the current application field has become more and more money. The light-emitting two-story can be driven at low voltage and low current (consumption of power, enthalpy, and high density of compact mounting density. Also because of the high brightness trend of visible light-emitting diodes, it is currently replacing the light bulb with a light-emitting diode. The car smashing lights 'father's wire and the highway's finger turn and other outdoor lie development. And because of the low current under the party, the light-emitting diodes can be directly driven by the Leo IC. In addition, in OA In the field of machines, high-output products such as green light-polar body light sources used in fax machines, photocopiers, and printers have been applied. The advantages of the speed and the sameness of the light-emitting diodes are short. Distance to the first communication light source, etc., the application range has been extended from the previous indicator light to a very wide range of fields. [New content] In terms of the development history of the light-emitting two-faced, the first lion moved to the lion (four) light-emitting diode realized red, yellow, Green light, due to the development of crystallization reduction technology, component processing technology, assembly technology, etc., has promoted the price reduction. Now 4 M322891 Today, the short wavelength blue of the light-emitting diode The production of color-emitting diodes is being carried out in Taiwan: research institutions and enterprises, and (4) is the main target, and the high-content and white-lightening of this material is expected. In recent years, it has been shining in blue. The advancement of the practical use of the polar body has made the full-color display of the three primary colors of red, green, and blue become feasible, and has rapidly expanded in applications such as thin wall-mounted televisions. It is also due to the recent light-emitting diodes being It is widely used in automotive electronics. Generally, the longer the life of the LED, the shorter the replacement time (number of times). In contrast, the use of LEDs in vehicle signals affects people's lives and safety. It is more excellent, and the special light-emitting diode has a limit of its life, especially at rated operating current, for example, below 2 mA, which will have a specific life, such as 5000 hours of operation. If the operating current of the light-emitting diode can be lowered, for example, 15 females, the lifespan can be extended to more than twice as long as the working loooo. On the other hand, due to the influence of the background light source, during the daytime News Indicating that the shavings should be strengthened to meet the identification requirements. However, at night, the same intensity of light not only emits light, but also tends to emit light that exceeds the required contrast. It seems to be glaring, but not easy. Identification, that is because of the relationship between the source of the background light; because there is no contrast of the sun at night, the light will stand out and even reach the point of glare. So at night we should be able to reduce Its operating current, one can make its light become softer and clearer, and the other is: it will extend its life. Therefore, in combination, the case is compared with the existing single-turn current driving circuit, so that the light becomes It is softer, has many advantages such as extending its life and saving energy. There are also some similar ideas, such as the TW551777 case of the same creator, but the source of the control signal is a sensor or a timer (such as GPS). Signal), but because of the fierce competition in the car system; increase the photoreceptor or timer, it will increase to 5. M322891, and the photoreceptor will have failure ; Affect traffic safety, thus proposed herein to the vehicle dashboard or near the signal light of the new patent application is a control signal. The above and other objects, features, and advantages of the present invention will become more apparent from the following description of the preferred embodiments of the invention. The block diagram of the whole body driving circuit of the diode, as can be seen from the figure, if we construct the LED driving circuit with a current-controlled current source circuit 30, the current of the LED driving operation can be effectively The ground is controlled by the control signal generated by the voltage control unit 20. In the past, there were some similar ideas. f is that the source of the control signal is a sensor or a timer (such as a GPS signal). ^ 疋 Because of the fierce competition in the car system, increasing the photoreceptor will increase the cost, and the photoreceptor will fail. Concerns; affecting the safety of driving, so the creation of the signal in the car dashboard or low beam as the control signal, the opening and closing of the light is determined by the car owner, when the car is dead, the low beam Or instrument lights or small lights, it means that the relevant circuits of the poles in the car can be dimmed. For example, for the vehicle DC signal, the signal sense 7 single 70 10 senses the presence or absence of the signal Va, and sends a lower voltage or a higher voltage, ^ 'to adjust the voltage controlled current source circuit 30 to drive the light. Diode. It can also be DC-free, and the signal unit 10 senses the signal of the in-vehicle instrument panel or the low beam, and sends a lower clock or a higher clock Vb to adjust the voltage-controlled current source. Circuit 30' drives the light emitting diode. It is a diagram of a voltage-controlled current circuit diagram driven by a light-emitting diode. As shown in the figure, Vb removes high-frequency noise through R6' C1 and R7 and sends it to the Darlington circuit composed of Q3 and Q4. Operate the current to drive the LEDs in moderation. This creation has a driving circuit for a light-emitting diode for a vehicle. The electric signal of the low beam or the instrument panel light 6 M322891 is used as a control signal, and the driving current of the light-emitting diode of the vehicle is segmented into two types as needed. It can be driven by a higher drive current and driven at a lower current rating at night to extend its life. Although the present invention has been disclosed in the above preferred embodiments, and the present invention is limited thereto, any skilled person can make various changes and refinements without departing from the scope of the present invention. The scope defined in the appended patent application shall prevail. M322891 [Simple description of the circle] Figure 1 Block diagram of the overall driving circuit of the LED for the vehicle. Figure 2 shows the voltage-controlled current circuit of the vehicle's LED. [Component drawing number description]
20電壓控制單元 10燈號感測單元 30壓控電流源電路20 voltage control unit 10 signal sensing unit 30 voltage controlled current source circuit
Va儀表板或是近光燈/小燈之訊號Va dashboard or low beam / small light signal
Vb壓控電流訊號Vb voltage control current signal