200909974 九、發明說明： 【發明所屬之技術領域】 本發明涉及一種投影系統。 【先前技術】 於投影系統中，液晶（Liquid Crystal Display，LCD)投 影系統、單晶石夕液晶（Liquid Crystal on Silicon，LCOS)投 影糸統及數位光源處理（Digital Light Processor, DLP)投影 系統所採用之投影機燈泡耗電大、熱量高、為投影機之小 型化帶來了障礙。 目前，於可檇式投影系統中一般採用耗電較低，熱量 較小之低功率光源’如發光二極體或雷射等。從而減少散 熱系統’使投影系統減小體積。然而’於需要高亮度之情 況下’低功率光源之發光亮度無法滿足要求。 【發明内容】 有#於此，有必要提供一種能提高投影系統光源亮度 之投影糸統。 種才又衫糸統’其包括至少一主光源、至少一輔助光 源及至少一光耦合放大裝置。所述至少一輔助光源與所述 至少一光耦合放大裝置依次沿主光源之光路設置。所述至 少一光耦合放大裝置將所述至少一主光源與所述至少一辅 助光源發出之光耦合並放大，使主光源產生增益。 相較於先前技術，所述之投影系統可通過光搞合放大 裝置利用輔助光源使投影機光源產生增益，提升投影機之 光源亮度’使投影機可以高亮度之顯示晝面，方便投影及 200909974 •觀看。 *【實施方式】 下面將結合附圖對本發明實施例作進一步之詳細說 明。 請參閱圖1，其為本發明實施例之投影系統100。本實 施例中以液晶投影系統為例。所述投影系統100包括一主 光源10、一分色裝置、三個辅助光源40、42、44，三個光 耦合放大裝置60、62、64及一光合裝置80。主光源10及 輔助光源40、42、44均為雷射或者發光二極體。所述分色 裝置及所述光耦合放大裝置分別相對應設置於光源10之 出射光線之光路上，並通過所述光合裝置80以形成圖像。 所述分色裝置包括一第一反射鏡120、一第一分色鏡 122、一第二反射鏡124、一第二分色鏡126、一第三反射 鏡，128及一第四反射鏡129。所述第一反射鏡120、第一分 色鏡122、第二反射鏡124、第二分色鏡126、第三反射鏡 128及第四反射鏡129分別設置於光源10之光線之出射或 反射後之光路上。光源10之自然光線經第一反射鏡120 反射後，光源10之光線中之紅色光透過第一分色鏡122 至第二反射鏡124，然後經所述第二反射鏡124反射至所 述光合裝置80。光源10之光線中綠色光與藍色光經第一 分色鏡122反射，其中藍色光透過第二分色鏡126，綠色 ‘光經第二分色鏡126反射至所述光合裝置80。藍色光透過 第二分色鏡126後通過第三反射鏡128反射至所述第四反 射鏡129，再經第四反射鏡129反射至光合裝置80。 7 200909974 • 所述輔助光源40、42、44分別與所述光耦合放大裝置 .6〇、62、64連接。可以理解，辅助光源40、42、44可以 依需要採用自動控制之方式控制與光耦合放大裝置6〇、 62、64之連接。輔助光源4〇、42、4 綠三色光之波長相當之光源即可。本實施例中:、辅助^ 4〇之波長與紅色光之波長相當，即輔助光源4〇之波長在 620-760奈米（nm)範圍内。輔助光源42之波長與藍色光 之波長相當，即輔助光源42之波|在44 „ 〜故责在446-464nm範圍内。 輔助光源44之波長鱼绦辛朵夕、士 e /、、、色九之波長相當，即輔助光源44 之波長在500-578nm範圍内。 所述光耦合放大裝置60 ,, c 衣直ου包括—波長選擇耦合器6〇2 及-光纖放大器604。所述波長選擇輕合器6〇2與所述光 纖放大為604電性遠接〇、，念F ^ ty j： a 电r玍逑接波長選擇耦合器602及光纖放大 器侧依次沿光源經第一分色鏡122分色後之紅色光之出 =方向設置。輔助_ 4〇可通過導光管傳輸至波長選擇耗 ^ 602,，亦可直接設置於波長選擇轉合 6〇2内。光耦 I放大裝置60之波長選騰器6〇2用以將同一波長之兩 先耦合成-路光以於光纖放大器中傳輸。本實施例中， ?光相合放大裝置60之波長選擇輕合器6〇2將輔助光源 :出之先及經第一分色鏡122分色出之紅色光耦合至光 .:放大器_。光纖放大器6〇4為摻雜光纖放大器，優選 /纖放大器_之摻雜離子之吸收波長為辅助光源4〇 =之光波長’也即與紅色光波長相當。辅助光源4〇可激 ’纖放大& 604《摻雜離子使光纖放大器6〇4可對波長 8 200909974 為620-760nm之紅色光訊號進行放大。 所述光耦合放大裝置62包括一波長選擇耦合器622 及一光纖放大器624。所述波長選擇耦合器622與所述光 纖放大器624電性連接。波長選擇耦合器622及光纖放大 器624依次沿光源10之光線分色後之藍色光經第四反射鏡 129反射後之出射方向設置。輔助光源42可通過導光管傳 輸至波長選擇耦合器622，亦可直接設置於波長選擇耦合 器622内。利用光耦合放大裝置62之波長選擇耦合器622 將輔助光源42發出之光及光經第四反射鏡129反射出之藍 色光耦合至光纖放大器624。光纖放大器624為摻雜光纖 放大器，優選地，光纖放大器624之摻雜離子之吸收波長 為輔助光源42之波長，也即與藍色光波長相當。輔助光源 42可激發摻雜光纖放大器624之摻雜離子使光纖放大器 62.4可對波長為446-464nm之藍色光訊號進行放大。 所述光耦合放大裝置64包括一波長選擇耦合器642 及一光纖放大器644。所述波長選擇耦合器642與所述光 纖放大器644電性連接。波長選擇耦合器642及光纖放大 器644依次沿光源10之光線經分色後之綠色光經第二分色 鏡126反射後之出射方向設置。輔助光源44可通過導光管 傳輸至波長選擇耦合器642，亦可直接設置於波長選擇耦 合器642内。利用光耦合放大裝置64之波長選擇耦合器 642將輔助光源44發出之光及經第二分色鏡126反射後之 綠色光耦合至光纖放大器644。光纖放大器644為摻雜光 纖放大器，優選地，光纖放大器644之摻雜離子之吸收波 200909974 長為辅助光源'44之波長，也即與綠色光波長相辅助光 源44可激發摻雜光纖放大器644之換雜離子使光纖放大器 644可對波長為5〇〇_578nm之綠色光訊號進行放大。 可以理解，投影系統1〇〇彳只設置兩光輕合放大裝 置:以適應各種色彩亮度調節之需求。分別沿紅色光與藍 色光之出射方向設置兩光搞合放大裝置6〇、62。或者，分 別沿紅色光與綠色光之出射方向設置兩光耦合放大裝置 60、64。或者’分別沿藍色光與綠色光之出射方向設置兩 個光耦合放大裝置62、64。 士還可以理解，技影系統還可只設置一光輕合放大 裝置。沿紅色光之出射方向設置光耦合放大裝置。或 者，沿監色光之出射方向設置光耦合放大裝置62。或者， 沿綠色光之出射方向設置光耦合放大裝置64。 ，可以理解，優選地，投影系統1〇〇中不採用分色裝置， 設置紅、綠、藍三個發光二極體作為主光源。將紅色發光 二極體光源對應於光耦合放大裝置6〇設置，藍色發光二極 體光源對應於光耦合放大裝置62設置，綠色發光I極體光 源對應於光輕合放大裝置64設置。 可以理解，所述光耦合放大裝置還可應用於數位光源 處理才又衫系統或單晶石夕液晶投影系統。其中，於數位光源 處理投影系統中，只需沿光路設置一使主光源產生增益之 光耗合放大裝置即可。 相較於先前技術，所述之投影系統可通過光耦合放大 裝置利用辅助光源使投影機光源產生增益，提升投影機之 200909974 ' 先源亮度，使投影機可以高亮度之顯示晝面，方便投影及 -觀看。 綜上所述，本發明確已符合發明專利之要件，爰依法 提出專利申請。惟，以上所述者僅為本發明之較佳實施方 式，本發明之範圍並不以上述實施方式為限，舉凡熟悉本 案技藝之人士援依本發明之精神所作之等效修飾或變化， 皆應涵蓋於以下申請專利範圍内。 【圖式簡單說明】 圖1為本發明實施例之投影系統結構示意圖。 【主要元件符號說明】 投影系統 100 主光源 10 第一反射鏡 120 第一分色鏡 122 第二反射鏡 124 第二分色鏡 126 第三反射鏡 128 第四反射鏡 129 辅助光源 40^ 42, 44 光耦合放大裝置 60、 62, 64 波長選擇輕合器 602、 622 、642 光纖放大器 604、 624 、644 光合裝置 80 11200909974 IX. Description of the Invention: [Technical Field of the Invention] The present invention relates to a projection system. [Prior Art] In a projection system, a liquid crystal display (LCD) projection system, a single crystal liquid crystal on silicon (LCOS) projection system, and a digital light processing (DLP) projection system The projector lamp used has high power consumption and high heat, which brings obstacles to the miniaturization of the projector. At present, low-power light sources such as light-emitting diodes or lasers, which consume less power and have less heat, are generally used in the 檇-type projection system. Thereby reducing the heat sink system' reduces the volume of the projection system. However, in the case where high brightness is required, the luminance of the low-power light source cannot meet the requirements. SUMMARY OF THE INVENTION There is a need to provide a projection system that can increase the brightness of the light source of the projection system. The invention includes at least one primary light source, at least one auxiliary light source, and at least one optical coupling amplifying device. The at least one auxiliary light source and the at least one optical coupling amplifying device are sequentially disposed along an optical path of the main light source. The at least one optical coupling amplifying device couples and amplifies the light emitted by the at least one main light source and the at least one auxiliary light source to generate a gain of the main light source. Compared with the prior art, the projection system can use the auxiliary light source to generate a gain by the projector light source through the light fitting and amplifying device, and improve the brightness of the light source of the projector, so that the projector can display the brightness with high brightness, and facilitate projection and 200909974. • Watch. *[Embodiment] Hereinafter, embodiments of the present invention will be further described in detail with reference to the accompanying drawings. Please refer to FIG. 1, which is a projection system 100 according to an embodiment of the present invention. In this embodiment, a liquid crystal projection system is taken as an example. The projection system 100 includes a main light source 10, a color separation device, three auxiliary light sources 40, 42, 44, three light coupling amplifying devices 60, 62, 64 and a photosynthetic device 80. The primary light source 10 and the auxiliary light sources 40, 42, 44 are both laser or light emitting diodes. The color separation device and the optical coupling amplifying device are respectively disposed on the optical path of the light emitted from the light source 10, and pass through the photosynthetic device 80 to form an image. The color separation device includes a first mirror 120, a first dichroic mirror 122, a second mirror 124, a second dichroic mirror 126, a third mirror, 128 and a fourth mirror 129. . The first mirror 120, the first dichroic mirror 122, the second mirror 124, the second dichroic mirror 126, the third mirror 128, and the fourth mirror 129 are respectively disposed at the light source 10 to emit or reflect light. After the light road. After the natural light of the light source 10 is reflected by the first mirror 120, the red light in the light of the light source 10 passes through the first dichroic mirror 122 to the second mirror 124, and then reflected by the second mirror 124 to the photosynthetic unit. Device 80. The green light and the blue light in the light of the light source 10 are reflected by the first dichroic mirror 122, wherein the blue light passes through the second dichroic mirror 126, and the green 'light is reflected by the second dichroic mirror 126 to the photosynthetic device 80. The blue light is transmitted through the second dichroic mirror 126, reflected by the third mirror 128 to the fourth reflecting mirror 129, and then reflected by the fourth reflecting mirror 129 to the photosynthetic device 80. 7 200909974 • The auxiliary light sources 40, 42, 44 are connected to the optical coupling amplifying devices .6, 62, 64, respectively. It will be appreciated that the auxiliary light sources 40, 42, 44 can be controlled for connection to the optical coupling amplifying means 6 〇, 62, 64 in an automated manner as desired. The auxiliary light sources 4, 42, and 4 can be used as light sources having the same wavelength as the green three-color light. In this embodiment, the wavelength of the auxiliary device is equivalent to the wavelength of the red light, that is, the wavelength of the auxiliary light source 4〇 is in the range of 620-760 nanometers (nm). The wavelength of the auxiliary light source 42 is equivalent to the wavelength of the blue light, that is, the wave of the auxiliary light source 42 is in the range of 446-464 nm. The wavelength of the auxiliary light source 44 is 绦 朵 、, 士 e /, ,, color The wavelength of nine is equivalent, that is, the wavelength of the auxiliary light source 44 is in the range of 500-578 nm. The optical coupling amplifying device 60, c, includes a wavelength selective coupler 6〇2 and an optical fiber amplifier 604. The light combiner 6〇2 is electrically connected to the optical fiber to be 604 electrically connected, and the F ty j: a is connected to the wavelength selective coupler 602 and the optical fiber amplifier side sequentially passes the light source through the first dichroic mirror. After the 122 color separation, the red light is out = direction setting. The auxiliary _ 4 〇 can be transmitted to the wavelength selection consumption 602 through the light pipe, or directly in the wavelength selection conversion 6 〇 2. The optocoupler I amplification device The wavelength selective device 6〇2 of 60 is used to couple the two wavelengths of the same wavelength into the path light for transmission in the fiber amplifier. In this embodiment, the wavelength selection combiner 6〇2 of the optical coincidence amplifying device 60 will Auxiliary light source: the red light separated by the first dichroic mirror 122 is coupled to the light. The fiber amplifier 6〇4 is a doped fiber amplifier, and the absorption wavelength of the doping ion of the preferred/fiber amplifier is the wavelength of the auxiliary light source 4〇=, that is, the wavelength of the red light. The auxiliary light source 4 〇 'Fiber Amplification & 604 "Doping ions enable the fiber amplifier 6〇4 to amplify a red optical signal having a wavelength of 8 200909974 of 620-760 nm. The optical coupling amplifying device 62 includes a wavelength selective coupler 622 and a fiber amplifier. 624. The wavelength selective coupler 622 is electrically connected to the optical fiber amplifier 624. The wavelength selective coupler 622 and the optical fiber amplifier 624 are sequentially reflected along the light of the light source 10 and then reflected by the fourth mirror 129. The auxiliary light source 42 can be transmitted to the wavelength selective coupler 622 through the light pipe, or directly disposed in the wavelength selective coupler 622. The light from the auxiliary light source 42 can be emitted by the wavelength selective coupler 622 of the optical coupling amplifying device 62. And the blue light reflected by the fourth mirror 129 is coupled to the fiber amplifier 624. The fiber amplifier 624 is a doped fiber amplifier, preferably, the fiber amplifier 6 The absorption wavelength of the doped ions of 24 is the wavelength of the auxiliary light source 42, that is, the wavelength of the blue light. The auxiliary light source 42 can excite the doping ions of the doped fiber amplifier 624 so that the fiber amplifier 62.4 can be blue with a wavelength of 446-464 nm. The optical coupling signal is amplified. The optical coupling amplifying device 64 includes a wavelength selective coupler 642 and a fiber amplifier 644. The wavelength selective coupler 642 is electrically connected to the optical fiber amplifier 644. The wavelength selective coupler 642 and the optical fiber amplifier The 644 is sequentially disposed along the exit direction of the light of the light source 10 after the color separation of the green light is reflected by the second dichroic mirror 126. The auxiliary light source 44 can be transmitted to the wavelength selective coupler 642 through a light pipe or directly to the wavelength selective coupler 642. The light from the auxiliary light source 44 and the green light reflected by the second dichroic mirror 126 are coupled to the fiber amplifier 644 by the wavelength selective coupler 642 of the optical coupling amplifying means 64. The fiber amplifier 644 is a doped fiber amplifier. Preferably, the doped ion absorption wave of the fiber amplifier 644 is longer than the wavelength of the auxiliary source '44, that is, the green light wavelength auxiliary light source 44 can excite the doped fiber amplifier 644. The hetero-ions allow the fiber amplifier 644 to amplify the green optical signal having a wavelength of 5 〇〇 578 nm. It can be understood that the projection system 1 is only provided with two light-light amplification devices: to meet the needs of various color brightness adjustments. Two light combining amplifying means 6 〇, 62 are respectively arranged along the outgoing directions of the red light and the blue light. Alternatively, two optical coupling amplifying means 60, 64 are disposed along the outgoing directions of the red light and the green light, respectively. Alternatively, two optical coupling amplifying devices 62, 64 are disposed along the outgoing directions of the blue light and the green light, respectively. It is also understandable that the technical system can also be provided with only one light-lighting amplifying device. An optical coupling amplifying device is disposed along the outgoing direction of the red light. Alternatively, the optical coupling amplifying means 62 is disposed in the direction in which the color light is emitted. Alternatively, the optical coupling amplifying means 64 is disposed in the outgoing direction of the green light. It can be understood that, preferably, the color separation device is not used in the projection system 1 , and three light-emitting diodes of red, green and blue are arranged as the main light source. The red light emitting diode light source is disposed corresponding to the light coupling amplifying device 6〇, the blue light emitting diode light source is disposed corresponding to the light coupling amplifying device 62, and the green light emitting body light source is disposed corresponding to the light light combining and amplifying device 64. It can be understood that the optical coupling amplifying device can also be applied to a digital light source processing system or a single crystal solar liquid crystal projection system. Wherein, in the digital light source processing projection system, it is only necessary to provide a light absorbing and amplifying device for generating a gain of the main light source along the optical path. Compared with the prior art, the projection system can use the auxiliary light source to generate a gain by the projector light source through the optical coupling amplifying device, and enhance the projector's 200909974 'pre-source brightness, so that the projector can display the brightness with high brightness, and facilitate projection. And - watch. In summary, the present invention has indeed met the requirements of the invention patent, and has filed a patent application according to law. However, the above description is only a preferred embodiment of the present invention, and the scope of the present invention is not limited to the above-described embodiments, and equivalent modifications or variations made by those skilled in the art in light of the spirit of the present invention are It should be covered by the following patent application. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic structural view of a projection system according to an embodiment of the present invention. [Main component symbol description] Projection system 100 Main light source 10 First mirror 120 First dichroic mirror 122 Second mirror 124 Second dichroic mirror 126 Third mirror 128 Fourth mirror 129 Auxiliary light source 40^ 42, 44 optical coupling amplifying device 60, 62, 64 wavelength selective combiner 602, 622, 642 fiber amplifier 604, 624, 644 photosynthetic device 80 11