201227149 六、發明說明： 【發明所屬之技術領域】 [0001] 本發明涉及一種投影裝置，尤其涉及一種投影裝置保護 系統及保護方法。 【先前技術·】 [0002] 一般地，鐳射投影裝置會發射紅、綠、藍三個鐳射，該 三個鐳射經混合後形成單個雷射光束，形成小之斑點。 該雷射光束在掃描反射鏡之反射下，在投影螢幕之區域 上高速逐行掃描，以形成圖像。 [0003] 惟，為了形成高亮度之圖像，必須施加高功率水準之雷 射光束。例如，對於螢幕上之每25流明（RGB)，需要大 約100mW之鐳射功率。這麼高之鐳射功率會對直視雷射光 束之人之眼睛產生損害。不僅讓人眼感到不舒適，嚴重 之還會造成失明。因此，投影裝置對人眼之主動保護成 為了急需解決之問題。 【發明内容】 [0004] 鑒於以上内容，有必要提供一楂能對人眼進行保護之投 影裝置保護系統和保護方法。 [0005] —種投影裝置保護系統，其包括一光機、一投影鏡頭、 及一殼體，所述殼體用於收容所述光機。所述投影鏡頭 安裝在所述殼體上，用於投影圖像。所述投影裝置保護 系統進一步包括一人體感應器、及一控制裝置。所述人 體感應器與所述投影鏡頭同側設置在所述殼體上。所述 控制裝置設置於所述殼體内且串聯在所述人體感應器與 所述光機之間。該人體感應器感測到所述投影裝置保護 099145757 表單編號A0101 第4頁/共14頁 0992078765-0 201227149 系統與一投影螢幕之間有人體存在時，發出一觸發訊號 至所述控制裝置。所述控制裝置控制所述光機停止發光 或降低發光功率，以使投射之光束亮度降低到不會損害 人眼之範圍。 [0006] 一種投影裝置保護方法，其包括如下步驟： [0007] 提供一投影裝置保護系統，所述投影裝置保護系統接受外 界輸入之圖像訊號以輸出投影圖像並將所述投影圖像投 射至一投影螢幕； Ο [0008] 感測所述投影裝置保護系統與投影螢幕之間是否有人體 存在； [0009] 若感測到所述投影裝置保護系統與投影榮幕之間有人體 存在時，控制所述投影裝置保護系統降低投影發光功率 ，以使投射之鐳射光束亮度降低到不會損害人眼之範圍 〇 [0010] G 與先前技術相比，本發明投影裝置保護系統之所述人體 感測器檢測人體在投影裝置保護系統與投影螢幕之間時 ，所述控制裝置控制使所述投影裝置停止工作或將投影 功率降低到人眼能夠承受之範圍内，從而實現對進入投 射區間人之眼睛之保護功能。 [0011] 【實施方式】 下面將結合附圖，對本發明實施方式作進一步之詳細說 明。 [0012] 請一併參閱圖1與圖2，為本發明投影裝置保護系統1〇〇之 099145757 功能模組圖。該投影裝置保護系統1〇〇包括一光機1〇、一 表單編號A〇101 第5頁/共Η頁 0992078765_〇 201227149 投影鏡頭20、一人體感應器30、一控制裝置40及一殼體 50。所述殼體50用於收容所述光機10及控制裝置40。所 述投影鏡頭20與人體感應器30設置在所述殼體50之同一 侧。 [0013] 本實施方式中，所述投影裝置保護系統100為一微型鐳射 投影機。所述光機10包括一紅色鐳射源11、一綠色鐳射 源12、一藍色鐳射源13、一合光棱鏡14、一掃描反射鏡 1 5、一光源驅動部1 6、一掃描反射鏡躁動部1 7及一控制 部18。所述光源驅動部16電性連接至所述紅色鐳射源11 、綠色鐳射源12、藍色鐳射源13。所述光源驅動部16用 於驅動所述紅色鐳射源11、綠色鐳射源12及藍色鐳射源 13分別發出紅、綠、藍色鐳射。所述合光棱鏡14用於混 合所述紅色鐳射源11、綠色鐳射源12、藍色鐳射源13發 射之鐳射，形成小之斑點，並將混合好之鐳射轉輸至所 述掃描反射鏡15。所述掃描反射鏡驅動部17用於驅動所 述掃描反射鏡15動作。所述掃描反射鏡15用於反射來自 所述合光棱鏡14之鐳射至所述投影鏡頭20，以此向一投 影螢幕S投影圖像。所述控制部18同時電性連接到所述光 源驅動部16與所述掃描反射鏡驅動部17，用於控制所述 光源驅動部16與所述掃描反射鏡驅動部17同步動作。本 實施方式中，所述掃描反射鏡15為MEMS (Micro Electro Mechanical System) 反射鏡。 [0014] 所述人體感應器30與所述控制裝置40電性連接，該人體 感應器30用於感測所述投影裝置保護系統100與投影螢幕 S之間是否有人體存在。本實施方式中，所述人體感應器 099145757 表單編號A0101 第6頁/共14頁 0992078765-0 201227149 30為一紅外線人體感應器。所述人體感應器30偵測到所 述投影裝置保護系統10 0與投影螢幕S之間有人體存在時 ，所述人體感應器30發出一觸發訊號至所述控制裝置40 〇 [0015] 所述控制裝置40連接至所述光機10之控制部18，也即， 所述控制裝置40串聯在所述光機10之控制部18與所述人 體感應器30之間。當所述控制裝置40接收到所述人體感 應器30發出之觸發訊號時，所述控制裝置40發出一控制 訊號至所述控制部18。所述控制部18接收到所述控制裝 置40發出之控制訊號後，控制所述光源驅動部16降低所 述紅色鐳射源11、綠色鐳射源12及藍色鐳射源13之發光 功率，以使投射之鐳射光束亮度降低到不會損害人眼之 範圍。本實施方式中，不會損害人眼之鐳射光束亮度範 圍為小於15流明。可以理解，當所述控制部18控制所述光 源驅動部16降低所述紅色鐳射源11、綠色鐳射源12及藍 色鐳射源13之發光功率至零時，所述投影裝置保護系統 100停止工作。 [0016] 請參閱圖3，本發明投影裝置保護方法之步驟流程如下： [0017] 步驟S101 :提供一投影裝置保護系統100，所述投影裝置 保護系統100接受外界輸入之圖像訊號以輸出投影圖像並 將所述投影圖像投射至一投影螢幕S ; [0018] 步驟S1 02 :感測所述投影裝置保護系統100與投影螢幕S 之間是否有人體存在； [0019] 步驟S103 :若感測到所述投影裝置保護系統100與投影螢 099145757 表單編號A0101 第7頁/共14頁 0992078765-0 201227149 幕S之間有人體存在，控制所述投影裝置保護系統loo降 低投影發光功率，以使投射之鐳射光束亮度降低到不會 損害人眼之範圍。 [0020] [0021] [0022] [0023] [0024] [0025] [0026] [0027] [0028] [0029] 可以理解，當所述投影裝置保護系統1 〇〇之投影發光功率 降低至零時，所述投影裝置保護系統100停止工作。 本發明實施方式之投影裝置保護系統及保護方法藉由人 臉區域檢測裝置檢測人臉在投影範圍内之相對位置並 藉由訊號處理裝置進行處理後，在所述人臉相對位置處 投影之與所述人臉區域相對應部分之晝面顯示為黑色， 從而實現對進入投射區間人之眼睛之保護功能。…， 另外，本領域技術人員討在本發明精相做其他變化 ，當然’這些依據本發明精神所做之變化，都應包括在 本發明所要求保護之範圍之内。 " 【圖式簡單說明】 圖1是本發明投影裝置保護系統之立體示意圖； 圖2是圖1中之投影裝置保替統之光機之結構示意圖； 圖3是本發明投影裝置保護方法之步驟流程圖。 【主要元件符號說明】 投影裝置保護系統：100 光機：10 投影鏡頭：20 人體感應器：30 099145757 表單編號A0101 第8頁/共14 頁 201227149 [0030] 控制裝置：4 0 [0031] 殼體：50 [0032] 紅色鐳射源：11 [0033] 綠色鐳射源：12 [0034] 藍色鐳射源：1 3 [0035] 合光棱鏡：14 [0036] 掃描反射鏡：15 〇 [0037] 光源驅動部：16 [0038] 掃描反射鏡驅動部：17 [0039] 控制部：18 099145757 表單編號A0101 第9頁/共14頁 0992078765-0201227149 VI. Description of the Invention: [Technical Field] [0001] The present invention relates to a projection apparatus, and more particularly to a projection apparatus protection system and a protection method. [Prior Art·] [0002] Generally, a laser projection device emits three lasers of red, green, and blue, and the three lasers are mixed to form a single laser beam to form a small spot. The laser beam is scanned progressively at high speed on the area of the projection screen under the reflection of the scanning mirror to form an image. [0003] However, in order to form a high-intensity image, it is necessary to apply a high-power level laser beam. For example, for every 25 lumens (RGB) on the screen, a laser power of about 100 mW is required. Such high laser power can cause damage to the eyes of those who are directly looking at the laser beam. Not only does it make people feel uncomfortable, but it can also cause blindness. Therefore, the active protection of the projection device to the human eye is an urgent problem to be solved. SUMMARY OF THE INVENTION [0004] In view of the above, it is necessary to provide a projection device protection system and a protection method capable of protecting a human eye. [0005] A projection device protection system includes a light machine, a projection lens, and a housing for housing the optical machine. The projection lens is mounted on the housing for projecting an image. The projection device protection system further includes a body sensor and a control device. The human body sensor is disposed on the housing on the same side as the projection lens. The control device is disposed in the housing and connected in series between the human body sensor and the optical machine. The human body sensor senses the protection of the projection device. 099145757 Form No. A0101 Page 4 of 14 0992078765-0 201227149 When there is a human body between the system and a projection screen, a trigger signal is sent to the control device. The control device controls the optomechanist to stop illuminating or reduce the illuminating power to reduce the brightness of the projected beam to a level that does not impair the human eye. [0006] A projection device protection method includes the following steps: [0007] Providing a projection device protection system, the projection device protection system accepts an externally input image signal to output a projection image and project the projection image To a projection screen; Ο [0008] sensing whether there is a human body between the projection device protection system and the projection screen; [0009] if a human body exists between the projection device protection system and the projection glory Controlling the projection device protection system to reduce the projection illumination power to reduce the brightness of the projected laser beam to a range that does not harm the human eye. [0010] G The projection device protection system of the present invention is compared with the prior art. The sensor detects that the human body is between the projection device protection system and the projection screen, and the control device controls to stop the projection device or reduce the projection power to a range that the human eye can bear, thereby realizing the entry into the projection interval. The protection of the eyes. [Embodiment] Hereinafter, embodiments of the present invention will be further described in detail with reference to the accompanying drawings. [0012] Please refer to FIG. 1 and FIG. 2 together, which is a functional module diagram of the 099145757 of the projection device protection system of the present invention. The projection device protection system 1 includes a light machine 1A, a form number A〇101, page 5/total page 0992078765_〇201227149, a projection lens 20, a human body sensor 30, a control device 40 and a casing 50. The housing 50 is used to house the optical machine 10 and the control device 40. The projection lens 20 and the human body sensor 30 are disposed on the same side of the casing 50. [0013] In the embodiment, the projection device protection system 100 is a micro laser projector. The optomechanical machine 10 includes a red laser source 11 , a green laser source 12 , a blue laser source 13 , a light combining prism 14 , a scanning mirror 15 , a light source driving unit 16 , and a scanning mirror The unit 1 7 and a control unit 18. The light source driving unit 16 is electrically connected to the red laser source 11 , the green laser source 12 , and the blue laser source 13 . The light source driving unit 16 is configured to drive the red laser source 11, the green laser source 12, and the blue laser source 13 to emit red, green, and blue laser light, respectively. The light combining prism 14 is configured to mix the laser emitted by the red laser source 11 , the green laser source 12 , and the blue laser source 13 to form a small spot, and transfer the mixed laser to the scanning mirror 15 . . The scanning mirror driving unit 17 is for driving the scanning mirror 15 to operate. The scanning mirror 15 is for reflecting the laser light from the light combining prism 14 to the projection lens 20, thereby projecting an image onto a projection screen S. The control unit 18 is electrically connected to the light source driving unit 16 and the scanning mirror driving unit 17 for controlling the light source driving unit 16 to operate in synchronization with the scanning mirror driving unit 17. In the present embodiment, the scanning mirror 15 is a MEMS (Micro Electro Mechanical System) mirror. [0014] The human body sensor 30 is electrically connected to the control device 40, and the human body sensor 30 is configured to sense whether there is a human body between the projection device protection system 100 and the projection screen S. In this embodiment, the human body sensor 099145757 Form No. A0101 Page 6 of 14 0992078765-0 201227149 30 is an infrared body sensor. When the human body sensor 30 detects that there is a human body between the projection device protection system 100 and the projection screen S, the human body sensor 30 sends a trigger signal to the control device 40 [0015]. The control device 40 is connected to the control unit 18 of the optical machine 10, that is, the control device 40 is connected in series between the control unit 18 of the optical machine 10 and the human body sensor 30. When the control device 40 receives the trigger signal from the human body sensor 30, the control device 40 sends a control signal to the control unit 18. After receiving the control signal from the control device 40, the control unit 18 controls the light source driving unit 16 to reduce the luminous power of the red laser source 11, the green laser source 12, and the blue laser source 13 to make a projection. The brightness of the laser beam is reduced to the extent that it does not harm the human eye. In the present embodiment, the laser beam luminance range which does not impair the human eye is less than 15 lumens. It can be understood that when the control unit 18 controls the light source driving unit 16 to reduce the luminous power of the red laser source 11 , the green laser source 12 and the blue laser source 13 to zero, the projection device protection system 100 stops working. . [0016] Please refer to FIG. 3, the flow chart of the method for protecting the projection device of the present invention is as follows: [0017] Step S101: providing a projection device protection system 100, the projection device protection system 100 accepting an externally input image signal to output a projection And displaying the projected image onto a projection screen S; [0018] Step S1 02: sensing whether there is a human body between the projection device protection system 100 and the projection screen S; [0019] Step S103: Sensing the projection device protection system 100 and the projection fire 099145757 Form No. A0101 Page 7 / 14 pages 0992078765-0 201227149 There is a human body between the screen S, controlling the projection device protection system loo to reduce the projection luminous power, Reduce the brightness of the projected laser beam to the extent that it does not harm the human eye. [0023] [0029] [0029] It can be understood that when the projection device protection system 1 投影 projection light power is reduced to zero At the time, the projection device protection system 100 stops working. The projection device protection system and the protection method according to the embodiment of the present invention detect the relative position of the face in the projection range by the face region detecting device and process the signal at the relative position of the face after being processed by the signal processing device. The face of the corresponding portion of the face region is displayed in black, thereby realizing the protection function for the eyes entering the projection interval. In addition, those skilled in the art will be able to make other changes in the precise phase of the present invention. Of course, variations made in accordance with the spirit of the present invention are intended to be included within the scope of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a projection device protection system of the present invention; FIG. 2 is a schematic structural view of a projection device of the projection device of FIG. 1; FIG. Step flow chart. [Main component symbol description] Projection device protection system: 100 Optical machine: 10 Projection lens: 20 Human body sensor: 30 099145757 Form number A0101 Page 8 of 14 201227149 [0030] Control device: 4 0 [0031] Housing :50 [0032] Red laser source: 11 [0033] Green laser source: 12 [0034] Blue laser source: 1 3 [0035] Light combining prism: 14 [0036] Scanning mirror: 15 〇 [0037] Light source driven Part: 16 [0038] Scanning mirror drive section: 17 [0039] Control section: 18 099145757 Form number A0101 Page 9 of 14 0992078765-0