200900838 .九、發明說明： 【發明所屬之技術領域】 本發明係關於—種光源驅動模組，特別關於一種數位 光源處理裝置之光源驅動模組。 【先前技術】 由於消費者對於影音視覺享受要求的不斷提升，投影 機的輕便、易攜以及具大螢幕效果的特性，使其亦逐漸於 顯示态領域中佔有—席之地。而同時由於投影機的需求不 斷提升’其所使用的數位光源處理（Digital Light Processing ’ DLP)技術也逐漸受業界重視。 凊參照圖1所示，於習知技術中，數位光源處理裝置 1係利用白光作為其光源u，然後，先經由一組聚光鏡12 將光源11發出之光線聚焦於一色輪13 (由紅綠藍三色所 組成之彩色濾光片）上，同時色輪13藉由一馬達μ帶動 旋轉使透過的光線轉變為不同顏色的色光。而後，再藉另 來光鏡15將牙過色輪13的色光聚焦於一數位微鏡元件 (Digital Micromirror Device, DMD ) 16 上。 而於數位微鏡元件16上係具有許多微型反射鏡，而 藉由該等微型反射鏡可將所需色光反射進入投影鏡頭17 的透光孔’或將不需要的色光反射離開投影鏡頭n的透 光孔’藉此控制色光的輸出’以構成影像晝面不同的明亮 色彩變化。 然而，數位光源處理裝置1雖然有色彩飽和，暗部細 7 200900838 節好等優點，但是當遇到色輪上各色濾光片間的接缝不平 整或不夠密合，以及色輪旋轉速度不夠快等問題時，也會 產生所謂的彩虹效應（rainbow effect)的缺失。另外，習 知技術係有利用白色發光二極體（Light Emitting Diode， LED)作為其光源11，雖然其在亮度上較傳統光源更為提 升，但同樣的仍有光源熱度的問題。因為當光源11過熱， 會造成亮度降低或閃爍的情況，但若為了降低光源11熱 度而增加散熱風扇的出風量，則也同時會造成散熱風扇噪 音的增加以及功率的消耗。 因此，如何改善數位光源處理裝置中色輪所產生之彩 虹效應的缺失，以及減少光源過熱所產生的問題，實屬當 前重要課題之一。 【發明内容】 有鑑於上述課題，本發明之目的為提供一種能改善數 位光源處理裝置中色輪所產生之彩虹效應的缺失，並減少 光源過熱問題之光源驅動模組。 緣是，為達上述目的，依據本發明之一種數位光源處 理裝置之光源驅動模組包^—發光單元、一控制單元、一 同步單元及一驅動單元。發光單元係至少具有一第一發光 元件及一第二發光元件。控制單元係輸出一調控訊號及一 順序訊號，其中控制單元係依據第一發光元件及第二發光 元件之發光順序輸出順序訊號。同步單元係與控制單元電 性連接，並接收順序訊號，且輸出一同步訊號。驅動單元 8 200900838 係與控制單元及發光單元電性連接，並接收調控訊號，且 輸出一第一驅動訊號及一第二驅動訊號以驅動第一發光 元件及第二發光元件。 承上所述，因依據本發明之一種數位光源處理裝置的 光源驅動模組係藉由不同顏色的發光元件來產生不同的 色光，並利用一同步單元輸出同步訊號給數位微鏡元件， 使數位微鏡元件與發光元件之發光順序產生同步。 與習知技術相比較，本發明藉由同步單元及不同顏色 的發光元件取代色輪及驅動色輪之馬達，不僅可藉此避免 因色輪所產生之彩虹效應，且可減少元件的數量，進而降 低製作成本。另外，由於本發明係利用不同顏色的發光元 件作為光源，因此，在影像表現上亦可得到較習知技術之 白色光源更好的色彩飽和度以及影像亮度。 【實施方式】 以下將參照相關圖式，說明依據本發明較佳實施例之 一種數位光源處理裝置的光源驅動模組。 請參照圖2所示，本發明較佳實施例之一種數位光源 處理裝置2之光源驅動模組21係與一數位光源處理介面 22電性連接，並包含一發光單元210、一控制單元211、 一同步單元212及一驅動單元213。另外，本實施例之光 源驅動模組21更包含一溫度檢測單元214。 發光單元210係具有一第一發光元件210a、一第二發 光元件210b及一第三發光元件210c。其中，發光元件 9 200900838 210a、210b及210c可分別為一紅色發光二極體、一綠色 發光二極體及一藍色發光二極體。當然，在其他的應用設 計中，發光元件210a、210b及210c亦可分別為一青綠色 發光二極體、一紫紅色發光二極體及一黃色發光二極體。 另外，發光單元210除三種顏色之發光二極體外，亦可再 增加一白色發光二極體，則更可增加其輸出之色彩亮度。 控制單元211係分別與同步單元212、驅動單元213 及溫度檢測單元214電性連接。控制單元211並包含一中 央處理器211a、一數位類比轉換器211b及一訊號放大器 211c，其中數位類比轉換器211b係分別與中央處理器211a 及訊號放大器211c電性連接。 當控制單元211接收到一影像資料Id，中央處理器 211a會將影像資料Id分為調控發光單元210之電流強度 的調控訊號C，以及控制發光單元210中第一發光元件 210a、第二發光元件210b及第三發光元件210c之發光順 序的順序訊號S1。而後中央處理器211a並輸出順序訊號 S1及調控訊號C。其中，順序訊號S1係輸出至同步單元 212，而調控訊號C則經數位類比轉換器211b由數位訊號 轉換為類比訊號，再經訊號放大器211c將訊號強度放大後 輸出至驅動單元213。 接著，當同步單元212接收到順序訊號S1後，則將 其轉換為同步訊號S2，並輸出同步訊號S2至數位光源處 理介面22中之數位微鏡元件221，使數位微鏡元件221與 發光單元210中各發光元件的發光順序產生同步。藉此係 200900838 可取代1知技射，色輪以及，動色輪之馬達的作動。 而驅動單元213除與控制單元叫電性連接外，同時 =與發光單元210電性連接，且驅動單元213係包含至少 2率電晶體213a及-直流電壓產生器㈣ 互電性連接。 -般而言，驅動單元213依據全橋架構、半橋架構或 個,:動架構的不同’其會具有四個功率電晶體⑽或二 旦日日體213a’於此並不加以限定其架構型態及數 里〇 ^區動單元213接收到由控制單元2ιι輸出之調控訊 後，功率電晶體213a會同時接收直流電壓產生哭21訃 ^之直流電壓訊號Dv以及調控訊號C，並調整輸出發 $凡2K)中各發衫件所需之直流電源，且分別輪出該 寻直流電源作為第一驅動訊號D丨、第二驅動訊號D 2及第 二驅動訊號D3，以分別驅動第一發光元件21〇a、第二發 光元件210b及第三發光元件2l〇c發光。 而發光單元210所發出之色光L，則射入至數位光源 處理介面22，並藉由〆處理器元件222調整數位微鏡元件 221上各微型鏡片的角度，控制各色光的輸出與否，構成 影像畫面I不同的明亮色彩變化。 另外，溫度檢測單元214則設置於發光單元210周 圍，係用來檢測發光單元210中各發光元件的溫度，或檢 測光源驅動模組21的環境溫度’端視不同需求可做不同 設定。溫度檢測單元214並包含至少一溫度檢測器2l4a、 11 200900838 -一多工器214b及一數位溫度監控器214c，其中多工器214b 係分別與數位溫度監控器214c及溫度檢測器21“電性連 接。在本實施例中，溫度檢測器214a係可為一熱敏電阻器 或一熱耦器。 ° 當發光單元210開始發光後，溫度檢測單元214中的 溫度檢測器214 a會不斷地接收各發光元件的溫度訊號τ， 並透過多工器214b而將溫度訊號τ傳送至數位溫度監控 器214c中。而數位溫度監控器21牝則將接收到之溫 號τ與其記憶體中之一溫度對照表Tb做比較，並輪^ 溫度回授訊號R至控制單元211中之中央處理器2iu。 又，當控制單元211中之中央處理器' 21U接收到溫度 回授訊號R後，則會對發光單元21〇中各發光元件2i〇a、 210b及2lGe之電流強度的調控訊號c作調整，以調控各 發光το件210a、210b及21〇c之發光強度。由於溫度的高 低將會影響發光二極體的亮度，因此藉由溫度的監控，將 可隨時依據所偵測到的溫度以調控驅動發光二二^的電 流大小，藉此可增加發光單元21〇的穩定性以及使用壽命。 综上所述，因依據本發明之一種數位光源處理裝置的 光源驅動模組係藉由不同顏色的發光元件來產生不同的 色光，並利用一同步單元輪出同步訊號給數位微鏡元件， 使數位微鏡7C件與發光元件之發光順序產生同步。 ' 與習知技術相比較，本發明藉由不同顏色的發光元件 •及同步單7L取代色輪及驅動色輪之馬達，不僅可藉此避免 因色輪的因素而產生之彩虹效應，且可用以減少元件的數 12 200900838 量’進而降低製㈣本。另外’由於本發明係则不同顏 色的發光元件作為光源’因此’在影像表現上亦可得到較 習知技術之白色光源更好的色彩飽和度以及影像亮度。 又，本發明更藉溫度檢測單元隨時檢測發光單元之加 度，並藉以調控料單元的發光強度，以^ 造成亮度降低或閃爍的情況，更可増 间 以及使用壽命。 早7^的穩疋性 以上所述僅為舉例性’而非為限 本發明之精神與範疇，而對其進行々有。任何未脫離 應包含於後附之中請專利範圍t。丁之等效修改或變更，均200900838. IX. INSTRUCTIONS: [Technical Field] The present invention relates to a light source driving module, and more particularly to a light source driving module of a digital light source processing device. [Prior Art] Due to the ever-increasing consumer demand for audio-visual visual enjoyment, the projector's light weight, portability and large-screen effect make it gradually occupy a place in the display field. At the same time, as the demand for projectors continues to increase, the Digital Light Processing (DLP) technology used by the projector has gradually gained attention in the industry. Referring to FIG. 1 , in the prior art, the digital light source processing apparatus 1 uses white light as its light source u, and then first focuses the light emitted by the light source 11 through a set of condensing mirrors 12 onto a color wheel 13 (from red, green and blue). On the color filter composed of three colors, the color wheel 13 is rotated by a motor μ to convert the transmitted light into a color of different colors. Then, the light beam 15 is used to focus the color light of the tooth color wheel 13 on a Digital Micromirror Device (DMD) 16. The digital micromirror device 16 has a plurality of micro mirrors, and the micro mirrors can reflect the desired color light into the light transmission hole of the projection lens 17 or reflect unwanted color light away from the projection lens n. The light-transmitting aperture 'by controlling the output of the color light' constitutes a bright color change that is different from the image plane. However, although the digital light source processing apparatus 1 has the advantages of color saturation, dark portion fine, and good quality, the joint between the color filters on the color wheel is not flat or insufficient, and the color wheel rotates fast enough. When the problem arises, there is also a lack of the so-called rainbow effect. In addition, the conventional technology uses a Light Emitting Diode (LED) as its light source 11, and although it is more enhanced in brightness than a conventional light source, the same problem still exists in the heat of the light source. Since the light source 11 is overheated, the brightness may be lowered or flickered. However, if the amount of air blown from the heat radiating fan is increased in order to reduce the heat of the light source 11, the noise of the heat radiating fan and the power consumption may be caused at the same time. Therefore, how to improve the lack of the color rainbow effect generated by the color wheel in the digital light source processing device and reduce the problem caused by the overheating of the light source is one of the current important issues. SUMMARY OF THE INVENTION In view of the above problems, an object of the present invention is to provide a light source driving module capable of improving the lack of rainbow effect generated by a color wheel in a digital light source processing apparatus and reducing the problem of overheating of the light source. In order to achieve the above object, a light source driving module of a digital light source processing apparatus according to the present invention comprises a light emitting unit, a control unit, a synchronizing unit and a driving unit. The light emitting unit has at least a first light emitting element and a second light emitting element. The control unit outputs a control signal and a sequence signal, wherein the control unit outputs the sequence signal according to the order of illumination of the first light-emitting element and the second light-emitting element. The synchronization unit is electrically connected to the control unit and receives the sequence signal, and outputs a synchronization signal. The driving unit 8 200900838 is electrically connected to the control unit and the light emitting unit, and receives the control signal, and outputs a first driving signal and a second driving signal to drive the first light emitting element and the second light emitting element. According to the above, the light source driving module of the digital light source processing device according to the present invention generates different color lights by using different color light emitting elements, and outputs a synchronization signal to the digital micromirror device by using a synchronization unit to make the digital position The micromirror elements are synchronized with the order of illumination of the illuminating elements. Compared with the prior art, the present invention replaces the color wheel and the motor that drives the color wheel by the synchronizing unit and the light-emitting elements of different colors, thereby not only avoiding the rainbow effect caused by the color wheel, but also reducing the number of components. In turn, the production cost is reduced. In addition, since the present invention utilizes light-emitting elements of different colors as the light source, it is possible to obtain better color saturation and image brightness of the white light source than the prior art in image representation. [Embodiment] Hereinafter, a light source driving module of a digital light source processing apparatus according to a preferred embodiment of the present invention will be described with reference to the related drawings. As shown in FIG. 2, a light source driving module 21 of a digital light source processing device 2 is electrically connected to a digital light source processing interface 22, and includes a light emitting unit 210 and a control unit 211. A synchronization unit 212 and a drive unit 213. In addition, the light source driving module 21 of the embodiment further includes a temperature detecting unit 214. The light emitting unit 210 has a first light emitting element 210a, a second light emitting element 210b and a third light emitting element 210c. The light-emitting elements 9 200900838 210a, 210b, and 210c may be a red light-emitting diode, a green light-emitting diode, and a blue light-emitting diode, respectively. Of course, in other application designs, the light-emitting elements 210a, 210b, and 210c may also be a cyan light-emitting diode, a magenta light-emitting diode, and a yellow light-emitting diode, respectively. In addition, the light-emitting unit 210 can add a white light-emitting diode in addition to the three-color light-emitting diodes, thereby increasing the color brightness of the output. The control unit 211 is electrically connected to the synchronization unit 212, the driving unit 213, and the temperature detecting unit 214, respectively. The control unit 211 further includes a central processor 211a, a digital analog converter 211b, and a signal amplifier 211c. The digital analog converter 211b is electrically connected to the central processing unit 211a and the signal amplifier 211c, respectively. When the control unit 211 receives an image data Id, the central processing unit 211a divides the image data Id into the control signal C for regulating the current intensity of the light-emitting unit 210, and controls the first light-emitting element 210a and the second light-emitting element in the light-emitting unit 210. The sequence signal S1 of the light-emitting sequence of 210b and the third light-emitting element 210c. The central processing unit 211a then outputs the sequence signal S1 and the control signal C. The sequence signal S1 is output to the synchronization unit 212, and the control signal C is converted into an analog signal by the digital analog converter 211b, and then amplified by the signal amplifier 211c and output to the driving unit 213. Then, when the synchronization unit 212 receives the sequence signal S1, it converts it into the synchronization signal S2, and outputs the synchronization signal S2 to the digital micromirror device 221 in the digital light source processing interface 22, so that the digital micromirror device 221 and the light emitting unit The order of illumination of each of the light-emitting elements in 210 is synchronized. By this means, 200900838 can replace the action of a motor with a knowing technique, a color wheel and a moving color wheel. The driving unit 213 is electrically connected to the light emitting unit 210, and the driving unit 213 includes at least two rate transistors 213a and a DC voltage generator (4). In general, the driving unit 213 is based on a full-bridge architecture, a half-bridge architecture, or a different architecture: it will have four power transistors (10) or two-day solar 213a, and the architecture is not limited thereto. After receiving the control signal outputted by the control unit 2 ι, the power transistor 213a receives the DC voltage and generates the DC voltage signal Dv and the control signal C, and adjusts the output. Sending the DC power required for each of the shirts in the 2K), and respectively rotating the DC power source as the first driving signal D丨, the second driving signal D 2 and the second driving signal D3 to respectively drive the first The light-emitting element 21A, the second light-emitting element 210b, and the third light-emitting element 21c are illuminated. The color light L emitted by the light-emitting unit 210 is incident on the digital light source processing interface 22, and the angle of each micro-lens on the digital micro-mirror device 221 is adjusted by the 〆 processor element 222 to control the output of each color light. Different bright color changes of the image screen I. In addition, the temperature detecting unit 214 is disposed around the light emitting unit 210 for detecting the temperature of each of the light emitting elements in the light emitting unit 210, or detecting the ambient temperature of the light source driving module 21, and different settings can be made according to different requirements. The temperature detecting unit 214 includes at least one temperature detector 2l4a, 11 200900838 - a multiplexer 214b and a digital temperature monitor 214c, wherein the multiplexer 214b is electrically connected to the digital temperature monitor 214c and the temperature detector 21, respectively. In this embodiment, the temperature detector 214a may be a thermistor or a thermocouple. ° When the light emitting unit 210 starts to emit light, the temperature detector 214a in the temperature detecting unit 214 continuously receives The temperature signal τ of each of the light-emitting elements transmits the temperature signal τ to the digital temperature monitor 214c through the multiplexer 214b, and the digital temperature monitor 21牝 receives the temperature τ and one of the temperatures in the memory. The comparison table Tb is compared, and the temperature feedback signal R is sent to the central processing unit 2iu in the control unit 211. Also, when the central processing unit '21U in the control unit 211 receives the temperature feedback signal R, it will The control signal c of the current intensity of each of the light-emitting elements 2i, a, 210b, and 21G of the light-emitting unit 21 is adjusted to adjust the light-emitting intensity of each of the light-emitting elements 210a, 210b, and 21〇c. Affecting the brightness of the light-emitting diode, so by monitoring the temperature, the current of the driving light-emitting diode can be adjusted according to the detected temperature at any time, thereby increasing the stability and the service life of the light-emitting unit 21〇 In summary, the light source driving module of the digital light source processing device according to the present invention generates different color lights by using different color light-emitting elements, and uses a synchronization unit to rotate the synchronization signals to the digital micro-mirror elements. The digital micromirror 7C is synchronized with the light emitting sequence of the light emitting element. Compared with the prior art, the present invention can be borrowed not only by the different color light emitting elements but also by the synchronous single 7L instead of the color wheel and the motor for driving the color wheel. This avoids the rainbow effect caused by the color wheel factor, and can be used to reduce the number of components 12 200900838 'and thus reduce the system (4). In addition, 'the invention is based on the different color of the light-emitting elements as the light source 'so' in the image performance It can also obtain better color saturation and image brightness than the white light source of the prior art. Moreover, the present invention further utilizes a temperature detecting unit. The detection of the addition degree of the light-emitting unit, and thereby adjusting the luminous intensity of the material unit, to cause the brightness to decrease or flicker, and the life and the service life. The stability of the early 7^ is only an example. Rather than limiting the spirit and scope of the invention, it is not intended to be included in the scope of the appended claims.
-Τ' «Α. J m 圖1為習知之一種數位光源處 置 圖2為本發明較佳實施例之〜t置的方塊圖；以2 驅動模組的方塊圖。 數位光源處理農 【主要元件符號說明】 1、2:數位光源處理裝置 11 :光源 12、15:聚光鏡 13 :色輪 14 :馬達 16 :數位微鏡元件 17 :投影鏡頭 13 200900838 21 :光源驅動模組 210 :發光單元 210a :第一發光元件 210b :第二發光元件 210c :第三發光元件 211 :控制單元 211a ··中央處理器 211b ··數位類比轉換器 211c :訊號放大器 212 :同步單元 213 :驅動單元 213a :功率電晶體 213b :直流電壓產生器 214 :溫度檢測單元 214a :溫度檢測器 214b :多工器 214c :數位溫度監控器 22 :數位光源處理介面 221 :數位微鏡元件 222 :處理器元件 I :影像晝面-Τ' «Α. J m Figure 1 is a conventional digital light source. Figure 2 is a block diagram of a preferred embodiment of the present invention; Digital light source processing agriculture [main component symbol description] 1, 2: digital light source processing device 11: light source 12, 15: condensing mirror 13: color wheel 14: motor 16: digital micromirror element 17: projection lens 13 200900838 21 : light source driving mode Group 210: light-emitting unit 210a: first light-emitting element 210b: second light-emitting element 210c: third light-emitting element 211: control unit 211a, central processing unit 211b, digital analog converter 211c: signal amplifier 212: synchronization unit 213: Driving unit 213a: power transistor 213b: DC voltage generator 214: temperature detecting unit 214a: temperature detector 214b: multiplexer 214c: digital temperature monitor 22: digital light source processing interface 221: digital micromirror element 222: processor Component I: Image Mask
Id :影像資料 C:調控訊號 S1 :順序訊號 200900838 S 2 :同步訊號 Dv :直流電壓訊號 D1 :第一驅動訊號 D2 :第二驅動訊號 D3 :第三驅動訊號 L :色光 T :溫度訊號 Tb :溫度對照表 R:溫度回授訊號Id: Image data C: Control signal S1: Sequence signal 200900838 S 2: Synchronization signal Dv: DC voltage signal D1: First drive signal D2: Second drive signal D3: Third drive signal L: Color light T: Temperature signal Tb: Temperature comparison table R: temperature feedback signal