201133117 t、發明說明： 【發明所屬之技術領域】 本發明涉及一種投影系統，尤其涉及一種可偵測掃描鏡片 運行狀況的投影系統。 【先前技術】 一種習知可應用在手機、個人數據助理、可攜式放映機等 電子產品中的投影系統包括一光源單元、一光源驅動電路、一 掃描單元、一掃描單元驅動電路、一出射鏡及一控制器。所述 掃描單元具有一可擺動的掃描鏡片。當手機、個人數據助理、 可攜式投影機等處於開啟或自檢狀態時，所述投影系統之控制 器控制掃描單元驅動電路及光源驅動電路，所述掃描單元驅動 電路驅動掃描鏡片擺動，用於控制輸出相對應的影像訊號的光 源驅動電路會同時驅動光源單元生成並輸出具高功率的雷射 光。由光源單元輸出的雷射光通過掃描鏡片的擺動而以掃描方 式射出並穿過出射鏡投影於投影面上。 惟，習知的投影系統使用過程中難以偵測掃描鏡片的運行 狀況，尤其當掃描鏡片無法擺動時，雷射光將無法藉由掃描鏡 片的擺動而投影，此時，雷射光將垂直於出射鏡入射且彙聚成 束狀，而該輸出的高功率雷射光長時間的照射在易燃物或人體 上容易造成火災或灼傷事故的發生，故針對該種習知的投影系 統的缺陷有必要研發一種可用於偵測掃描鏡片運行狀況的投 影系統。 【發明内容】 本發明之目的是針對上述習知技術存在之缺陷提供一種可 用於偵測掃描鏡片運行狀況的投影系統。 為達成上述目的，本發明所提供的投影系統包括一光源單 201133117 元、一光源驅動電路、一掃描單元、一掃描單元驅動電路、一 出射鏡、複數感知器及一控制器。光源驅動電路用以驅動光源 單元生成雷射光，掃描單元具有一可擺動的掃描鏡片，用以接 受光源單元的雷射光並送出，掃描單元驅動電路用以驅動掃描 鏡片的擺動，出射鏡大致呈片狀且具有一投影成像區域，感知 器設置於投影成像區域外，用以接受掃描單元送出的雷射光並 根據雷射光輸入狀況生成反饋訊號，控制器接受反饋訊號並控 制光源驅動電路及掃描單元驅動電路。 如上所述，本發明投影系統藉將感知器設置投影成像區域 • 外，故可以偵測掃描鏡片的運行狀況，從而可避免因掃描鏡片 不動時引起高功率的雷射光長時間照射易燃物或人體上而引 起的火災事故或灼傷。 【實施方式】 為詳細說明本發明之技術内容、構造特徵、所達成目的及 功效，以下茲舉例並配合圖式詳予說明。 請參閱第一圖，本發明投影系統100包括一光源單元10、 一光源驅動電路20、一掃描單元30、一掃描單元驅動電路40、 φ 一出射鏡50、複數感知器60及一控制器70。 請參閱第一圖及第二圖，本發明投影系統100之控制器 70用以控制光源驅動電路20及掃描單元驅動電路40。所述光 源驅動電路20用以驅動光源單元10生成雷射光，所述掃描單 元驅動電路40用以驅動掃描單元30，且該掃描單元30具有 一可往復擺動的掃描鏡片301，用以接受光源單元10的雷射 光並送出。所述出射鏡50用以透射由掃描單元30送出的雷射 光並將影像投影於投影面（圖中未示）上。 當投影系統100處於開啟或自檢狀態時，控制器70分別 201133117 向掃描單元驅動電路40及光源驅動電路30發出相應的驅動訊 號。所述掃描單元驅動電路4〇驅動掃描單元30之掃描鏡片 3〇1來回往復擺動。所述控制器7〇同時將相應的同步驅動訊 號傳送給光源驅動電路3〇，並使光源驅動電路30驅動光源單 疋10生成雷射光’所述光源單元1〇生成的雷射光投射於來回 往復擺動的掃描鏡片301上，藉由掃描鏡片301的來回往復擺 動’故可使雷射光以掃描方式送出，且雷射光經出射鏡5〇後 將影像投射於投影面（圖中未示）上。 請一併參閱第二圖，該掃描鏡片301在掃描單元驅動電路 40的驅動下可同時繞垂直於紙面之軸和平行於紙面之軸轉 動，當掃描鏡片301繞垂直於紙面之軸轉動時，由光源單元 10入射之雷射光經掃描鏡片301的反射可在一個維度上進行 S像知也，同理，當扣描鏡片繞平行於紙面之轴轉動時可 在另一個維度上進行圖像掃描折返時，會較其它相同的掃描路 徑所化費的掃描時間長，即在極限位置會產生一定的時間延 遲》 明參閱第二ϋ ’出射鏡5〇大致呈片狀且具有一投影成像 區域501 ’該投影成像區域5〇1由可透射雷射光之透光材料製 k而成。所述感知器60用以接受掃描單元3〇送出的雷射光並 根據雷射光輸入狀況生成反饋訊號。 清參閱第三圖及第四圖，在本發明投影系統刚中，由掃 鏡片301送出之雷射光到達出射鏡％時形成有一照射區域 31 I、、射區域31之形狀大小均略大於出射鏡％之投影成像 區域501 照射區域31可進_步劃分為一可透射區域扣 及-不可透射區域312，所述可透射區域3ιι形狀大小與出射 鏡50之投影成像區㉟5〇1 _致且投影時一 一對應。所述不可 技射區域12為本發明投影系統刚 < 掃描鏡片3〇1掃描到極 201133117 限位置附近時的雷射光投影後形成的區域，且投射於該不可透 射區域的雷射光不具有影像訊號。在本發明投影系統100所示 的較佳實施例中，出射鏡50之投影成像區域501大致呈方形， 如第二圖所示，出射鏡50投影成像區域501之長寬與可透射 區域311之長寬大小一致。 藉由照射區域31大於出射鏡50之投影成像區域5〇1，且 照射區域31之可透射區域311與出射鏡％之投影成像區域 5〇1形狀大小一致，針對本發明投影系統1〇〇上述之情況可知： 當出射鏡50鏡片形狀大小縮小至出射鏡5〇之投影成像區 _ 域501形狀大小時，即出射鏡50鏡片與照射區域31之可透射 區域311完全對應時，出射鏡5〇的外圍周圈會相對應的形成 所述的不可透射區域312，該不可透射區域312可在如用以固 定出射鏡50的投影機殼體（圖中未示）上形成相應的對應區 域，故可將感知器00設置於投影機殼體（圖中未示）上所述不 可透射區域312的對應區域用以偵測光訊號，且在其它的實施 例中也可針對具體貫施方案確定感知器60在不可透射區域 312的具體位置狀況及數量。 馨當出射鏡50鏡片形狀大小大於或等於照射區域31時即 照射區域31可完全投射在出射鏡5〇上時，此時，可於出射鏡 50上該出射鏡50與不可透射區域312相對應的區域設置複數 感知器60用以谓測光訊號，在本發明投影系统ι〇〇的具體實 施例中，如第三圖所示，所述不可透射區域312的邊緣轉角處 均分佈有至少-感知器6〇。在其它具體實施财，也可針對 具體實施方案確定感知H 6G於出射鏡5G上對應區域的旦體位 置及數量。對感知器60於該出射鏡5〇與不可透射區域5〇1相 對應的對應區域分布的位置及數量的其它等效變化均應包括 在本發明投影系統之專利範圍。此外’出射鏡5〇二的對 201133117 應區域可用不可透射雷射光之塗料塗敷於該對應區域或於該 對應區域設置不可透射雷射光之組件並與出射鏡5()相互組裝 配合藉以同時達成投影系統！ 〇〇偵測投影之需求。 當出射鏡50形狀大小介於可透射區域311與照射區域3ιι 之間時，即不可透射區域312可同時於出射鏡上及諸如投影機 殼體（圖中未示）等組件上形成對應區域時，此時，可根據具體 實施方案將感知器60設置於出射鏡50上的對應區域也可設置 於投影機殼體（圖中未示）等組件上的對應區域，亦可根據具體 實施方案之需求對感知器60在設置位置上作具體的佈置，在 此不再贅述。 然而上述二種情況，並不能含蓋利用不可投射區域3丨2進 行故障制的所有情況，應指出的是，凡利用不可透射區域 312進行故障偵測及由不可透射區域内反射之雷射光進行偵測 的均應含蓋在本專利的保護范圍内。 請續參閱第一圖、第三圖及第四圖，在本具體實施例中， 投影成像區域501大致呈長方形，且出射鏡5〇鏡片形狀大小 恰好與照射區域31 — 一對應，即此時照射區域31可完全投射 在出射鏡50上。出射鏡50上該出射鏡5〇與不可透射區域312 的對應區域的邊緣轉角處相同位置均設置有至少一感知器 60，即於投影成像區域501的邊緣轉角處的外側相同位置設置 有至少一感知器60。掃描鏡片301正常擺動時，由掃描單元 3〇送出之雷射光投射於出射鏡5〇上，照射於出射鏡％上的 雷射光-部分穿過投影成像區域501而將相應的影像投射於 投影面（圖中未示）上，另—部分雷射光投射於出射鏡5〇上該 出射鏡50與不可透射區域312相對應的區域，且當掃描鏡片 301掃描到極限位置附近時所送出的雷射光，可由感知器的 接受並生成相應的反饋訊號，輸出的反饋訊號由控制器接 201133117 又’並由控制器70判斷並輸出掃描鏡片3〇ι運行正常的訊號 給顯示單㈣中未示），藉此可使本投影系統剛及操作人員 知悉投影設備處於正常運行的狀况並作下—步相關的操作。 本發明投影系統1〇〇中，掃描鏡片3〇1不正常擺動時，存 在=種情況。第-種情況：即當掃描鏡片训無法擺動而停留 於中央位置或擺動不到位時，經掃描單元3()掃描後送出之雷 ^光將無法藉由感知器⑹接受，此時，感知請生成相關的 反饋桃給控制器70’由控制器7〇判斷並輸出掃描鏡片3〇1 ^于不正常的訊號給顯示單⑽中未示），藉此可使本投影系 統100及細作人員知悉投影設備處於不正常運行的狀況並作 下一步相關的操作。 第二種情況:即當掃描鏡片301在垂直於紙面之軸和平行 ^紙面之軸的任--個軸向上無法擺動時，經掃描單元30掃 :後达出之雷射光雖射由感知器6G所接受，但感知器60接 =的雷射S的時間_和頻率均和掃描鏡片正常擺動時有 差異，感知器60生成的反饋訊號由控制器7〇接受判斷並輸出 掃描鏡片則運行不正常的訊號給顯示單元（圖中未示），藉此 可使本投影系統100及操作人員知悉投影設備處於不正；運 灯的狀況並作下一步相關的操作。 丈 本發明投影系統並不僅限於上述具體實施例，其它 施方案的等效變化，都應屬於本發明之專利保護範圍 如上所述，本發明投影系統藉將感知器60設置於投 像區域船卜，故可以偵測掃描鏡片301的運行狀況，從： 避免因掃描鏡片30"動時引起高功率的雷射光長時 易燃物或人體上而引起的火災事故或灼傷。 ‘、'、锕 【圖式簡單說明】 201133117 第一圖為本發明投影系統之結構示意圖。 第一圖為本發明投影系統之掃描鏡片工作示音圖。 第二圖為本發明投影系統工作時由掃# τ田谉栎皁兀送出之雷射 元斯 、射於出射鏡上的示意圖。 第四圖為本發明投影系統正常工作時由掃描單元送出之 雷射光到達出射鏡時所形成的照射區域示意圖。 【主要元件符號說明】 投影系統 100 光源單元 10 光源驅動電路 20 掃描單元 30 掃描鏡片 301 照射區域 31 可透射區域 311 不"Sf透射區域 312 掃描單元驅動電路40 出射鏡 50 投影成像區域 501 感知器 60 控制器 70201133117 t, invention description: [Technical Field] The present invention relates to a projection system, and more particularly to a projection system capable of detecting the running condition of a scanning lens. [Prior Art] A projection system that can be applied to electronic products such as mobile phones, personal data assistants, and portable projectors includes a light source unit, a light source driving circuit, a scanning unit, a scanning unit driving circuit, and an output mirror. And a controller. The scanning unit has a oscillating scanning lens. When the mobile phone, the personal data assistant, the portable projector, etc. are in an open or self-test state, the controller of the projection system controls the scanning unit driving circuit and the light source driving circuit, and the scanning unit driving circuit drives the scanning lens to swing, The light source driving circuit for controlling the image signal corresponding to the output simultaneously drives the light source unit to generate and output laser light with high power. The laser light outputted by the light source unit is scanned in a scanning manner by the oscillation of the scanning lens and projected through the exit mirror onto the projection surface. However, it is difficult to detect the running condition of the scanning lens during the use of the conventional projection system. Especially when the scanning lens cannot swing, the laser light cannot be projected by the swing of the scanning lens. At this time, the laser light will be perpendicular to the output mirror. Incident and convergence into a bundle, and the high-power laser light output from the output for a long time on the flammable material or the human body is liable to cause a fire or burn accident, so it is necessary to develop a defect for the conventional projection system. A projection system that can be used to detect the running condition of a scanning lens. SUMMARY OF THE INVENTION It is an object of the present invention to provide a projection system that can be used to detect the operating condition of a scanning lens in view of the above-described drawbacks of the prior art. To achieve the above objective, the projection system provided by the present invention comprises a light source unit 201133117, a light source driving circuit, a scanning unit, a scanning unit driving circuit, an output mirror, a complex sensor and a controller. The light source driving circuit is configured to drive the light source unit to generate laser light, the scanning unit has a swingable scanning lens for receiving the laser light of the light source unit and is sent out, and the scanning unit driving circuit is used for driving the scanning mirror to oscillate, and the output mirror is substantially in the form of a piece. And having a projection imaging area, the sensor is disposed outside the projection imaging area for receiving the laser light sent by the scanning unit and generating a feedback signal according to the laser light input condition, and the controller receives the feedback signal and controls the light source driving circuit and the scanning unit driving Circuit. As described above, the projection system of the present invention can detect the running condition of the scanning lens by setting the sensor to the projection imaging area, thereby avoiding the high-power laser light from being irradiated with flammable materials for a long time when the scanning lens is not moving or A fire accident or burn caused by the human body. [Embodiment] The details of the technical contents, structural features, objects and effects of the present invention will be described in detail below with reference to the drawings. Referring to the first figure, the projection system 100 of the present invention comprises a light source unit 10, a light source driving circuit 20, a scanning unit 30, a scanning unit driving circuit 40, a φ an output mirror 50, a complex sensor 60 and a controller 70. . Referring to the first and second figures, the controller 70 of the projection system 100 of the present invention is used to control the light source driving circuit 20 and the scanning unit driving circuit 40. The light source driving circuit 20 is configured to drive the light source unit 10 to generate laser light, the scanning unit driving circuit 40 is configured to drive the scanning unit 30, and the scanning unit 30 has a reciprocatingly oscillating scanning lens 301 for receiving the light source unit. 10 laser light and sent out. The exit mirror 50 is for transmitting the laser light emitted by the scanning unit 30 and projecting the image onto a projection surface (not shown). When the projection system 100 is in the on or self-test state, the controller 70 issues a corresponding driving signal to the scanning unit driving circuit 40 and the light source driving circuit 30, respectively, 201133117. The scanning unit drive circuit 4 drives the scanning lens 3〇1 of the scanning unit 30 to swing back and forth. The controller 7 传送 simultaneously transmits the corresponding synchronous driving signal to the light source driving circuit 3 〇, and causes the light source driving circuit 30 to drive the light source unit 10 to generate laser light. The laser light generated by the light source unit 1 投射 is projected back and forth. The oscillating scanning lens 301 is oscillated back and forth by the scanning lens 301. Therefore, the laser light can be sent in a scanning manner, and the laser light is projected through the output mirror 5 and projected onto a projection surface (not shown). Referring to the second figure, the scanning lens 301 can be rotated by the scanning unit driving circuit 40 about the axis perpendicular to the paper surface and the axis parallel to the paper surface. When the scanning lens 301 is rotated about the axis perpendicular to the paper surface, The reflection of the laser light incident by the light source unit 10 through the scanning lens 301 can be performed in one dimension. Similarly, when the decoupling lens is rotated parallel to the axis of the paper, the image scanning can be performed in another dimension. At the same time, the scanning time of the other scanning path is longer than that of the other scanning paths, that is, a certain time delay occurs at the extreme position. See the second ϋ 'the exit mirror 5 〇 is substantially sheet-shaped and has a projected imaging area 501 ' The projection imaging area 〇1 is made of a light transmissive material that can transmit laser light. The sensor 60 is configured to receive the laser light sent by the scanning unit 3 and generate a feedback signal according to the laser light input condition. Referring to the third and fourth figures, in the projection system of the present invention, the laser light sent from the scanning mirror 301 reaches the exit mirror % to form an illumination area 31 I, and the shape of the shot area 31 is slightly larger than the output mirror. The projection area 501 of the projection area 501 can be divided into a transmissive area and a non-transmissive area 312, and the size of the transmissive area 3 ι is the projection imaging area 355 〇 1 of the exit mirror 50 and projection Time corresponds one by one. The non-radiable area 12 is an area formed by the projection system of the present invention when the scanning lens 3〇1 is scanned near the limit position of the pole 201133117, and the laser light projected on the non-transmissive area does not have an image. Signal. In the preferred embodiment of the projection system 100 of the present invention, the projected imaging area 501 of the exit mirror 50 is substantially square. As shown in the second figure, the exit mirror 50 projects the length and width of the imaging area 501 and the transmissive area 311. The length and width are the same. By the illumination area 31 being larger than the projection imaging area 5〇1 of the exit mirror 50, and the transmittable area 311 of the illumination area 31 is consistent with the shape of the projection imaging area 5〇1 of the exit mirror, for the projection system of the present invention It can be seen that when the shape of the lens of the exit mirror 50 is reduced to the size of the projected imaging area _ field 501 of the exit mirror 5, that is, when the lens of the exit mirror 50 completely corresponds to the transmissive area 311 of the illumination area 31, the exit mirror 5〇 The peripheral circumference of the periphery may form the non-transmissive area 312 correspondingly, and the non-transmissive area 312 may form a corresponding corresponding area on a projector housing (not shown) for fixing the exit mirror 50, The sensor 00 can be disposed on a corresponding area of the non-transmissive area 312 on the projector housing (not shown) for detecting optical signals, and in other embodiments, the sensing can be determined for a specific implementation. The specific position and number of devices 60 in the non-transmissive region 312. When the shape of the lens of the exit lens 50 is greater than or equal to the illumination area 31, that is, the illumination area 31 can be completely projected on the exit mirror 5, at this time, the exit mirror 50 can correspond to the non-transmissive area 312 on the exit mirror 50. The area setting complex sensor 60 is used to measure the optical signal. In the specific embodiment of the projection system ι of the present invention, as shown in the third figure, at least the edge is distributed at the edge corner of the non-transmissive area 312. 6 〇. In other implementations, the position and number of the sensing regions of the corresponding regions of the H 6G on the exit mirror 5G may also be determined for a specific implementation. Other equivalent variations in the position and number of distributions of the perceptron 60 corresponding to the corresponding regions of the exit mirror 5A and the non-transmissive region 5〇1 are intended to be included in the patented scope of the projection system of the present invention. In addition, the pair of exit mirrors 〇2, 201133117 should be coated with a non-transmissive laser light coating in the corresponding area or a non-transmissive laser light component is arranged in the corresponding area and assembled with the output mirror 5() to achieve at the same time Projection system! 〇〇Detect the need for projection. When the shape of the exit mirror 50 is between the transmittable region 311 and the illumination region 3ι, that is, the non-transmissive region 312 can simultaneously form a corresponding region on the output mirror and components such as a projector housing (not shown) In this case, the corresponding area where the sensor 60 is disposed on the output mirror 50 according to the specific implementation may also be disposed in a corresponding area on a component such as a projector housing (not shown), or according to a specific implementation. The requirements of the sensor 60 are specifically arranged in the set position, and will not be described herein. However, the above two cases cannot cover all the cases in which the unprojectable area 3丨2 is used for failure. It should be noted that the non-transmissive area 312 is used for fault detection and laser light reflected by the non-transmissive area. All detected should be covered by the scope of this patent. Referring to the first, third, and fourth figures, in the specific embodiment, the projected imaging area 501 is substantially rectangular, and the shape of the exit lens 5 is exactly corresponding to the illumination area 31, that is, at this time. The illumination area 31 can be completely projected onto the exit mirror 50. At least one sensor 60 is disposed on the exit mirror 50 at the same position at the edge corner of the corresponding area of the non-transmissive area 312, that is, at least one is disposed at the same outer side at the edge corner of the projected imaging area 501. Perceptron 60. When the scanning lens 301 is normally oscillated, the laser light emitted by the scanning unit 3 is projected onto the output mirror 5, and the laser light irradiated onto the output mirror is partially projected through the projection imaging area 501 to project the corresponding image onto the projection surface. (not shown), another portion of the laser light is projected on the exit mirror 5A in the region corresponding to the non-transmissive region 312, and the laser light is emitted when the scanning lens 301 is scanned near the extreme position. It can be accepted by the sensor and generate corresponding feedback signal. The output feedback signal is connected to the controller by the controller 201133117 and is judged by the controller 70 and outputs the scanning lens 3〇 to operate normally to the display unit (4). Thereby, the projection system can be informed by the operator and the operator that the projection device is in a normal operation state and performs the following related operations. In the projection system 1 of the present invention, when the scanning lens 3〇1 is not normally oscillated, there is a case. The first case: when the scanning lens training cannot swing and stay at the center position or the swing is not in place, the lightning light sent after scanning by the scanning unit 3() cannot be accepted by the sensor (6). Generating the relevant feedback peach controller 70' is judged by the controller 7〇 and outputs the scanning lens 3〇1 ^ to the abnormal signal to the display list (10), thereby making the projection system 100 and the expert knowing The projection device is in an abnormal operating condition and performs the next related operations. The second case is that when the scanning lens 301 cannot swing in any axial direction perpendicular to the axis of the paper surface and the axis of the parallel paper surface, the laser light that is scanned by the scanning unit 30 is emitted by the sensor. Accepted by 6G, but the time and frequency of the laser S connected to the sensor 60 are different from those of the scanning mirror. The feedback signal generated by the sensor 60 is judged by the controller 7 and the scanning lens is output. The normal signal is given to the display unit (not shown), so that the projection system 100 and the operator can know that the projection device is in the wrong state; the condition of the light is carried out and the next related operation is performed. The projection system of the present invention is not limited to the above specific embodiments, and the equivalent changes of other embodiments should belong to the patent protection scope of the present invention. As described above, the projection system of the present invention provides the sensor 60 in the projection area. Therefore, the running condition of the scanning lens 301 can be detected, from: Avoiding fire accidents or burns caused by long-term flammable materials or human body caused by high-power laser light when scanning the lens 30" ‘, ', 锕 [Simple description of the schema] 201133117 The first figure is a schematic structural view of the projection system of the present invention. The first figure is a working sound diagram of the scanning lens of the projection system of the present invention. The second figure is a schematic diagram of the laser element sent by the sweeping 谉栎 谉栎 、 、 射 、 、 、 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 The fourth figure is a schematic diagram of an illumination area formed when the laser light sent by the scanning unit reaches the exit mirror during normal operation of the projection system of the present invention. [Main component symbol description] Projection system 100 Light source unit 10 Light source driving circuit 20 Scanning unit 30 Scanning lens 301 Irradiation area 31 Transmissive area 311 Not "Sf transmission area 312 Scanning unit driving circuit 40 Output mirror 50 Projection imaging area 501 Sensor 60 controller 70