201007332 η 九、發明說明： 【發明所屬之技術領域】 - 本發明涉及一種投影機及其節能控制方法。 . 【先前技術】 ^彡機作為-種錢的資訊傳㈣介被廣泛應用於各 =口/= 了使投影機之功能多樣化’已有將投影機及 &等衫像播放工具整合在一起使投影機具備影像播放功 此，由此’投影機既可以投影之方式播放影像資料，亦可 ❹以猎由外接-顯示裝置將影像資料輸出並在所述顯示裝置 上顯不，然而，因為投影機進行影像投影與dvd之影像輸 /出並行’因此當採用此種投影機與__顯示裝置相連接而進 行影像播放時’投影機本身亦會將影像同時投影出來從 而不利於節約資源，同時造成光污染而影響影像之顯示效 果0 【發明内容】 影機 有鑒於此，有必要提供一種可進行節能控制之投 ❹及其節能控制方法。 一種投影機包括一影像資料讀取控制器、一影像資料 處理控制器、一控制面板、一光源驅動控制器以及—影像 頻輸出接口。所述影像資料讀取控制器用以讀取影像資 料’並配置料料資狀輸$格式。所述料資料處理 控制器用以接收所述影像資料讀取控制器輸出之影像資 料，並將所述影像資料數位化後傳輸至控制面板。所述押 制面板用以接收所述影像資料並產生與所述影像資料相^ 201007332 應之幢幅脈波，並將該Ψ貞幅脈波傳輪至光源驅動控制器。 所述光源驅動控制器根據所述控制面板輸出之_脈波控 制投影機光社開啟時序及開啟_。該㈣機還包括一 影頻同步仙彳器以及-微處理控制器。所述影頻同步侦測 器用以_影像頻輸出接α是否輸出同步訊號，並將^貞 測結果傳輸給所述微處理控制器。所㈣處理㈣㈣以201007332 η Nine, invention description: [Technical field to which the invention pertains] - The present invention relates to a projector and an energy saving control method thereof. [Prior Art] ^The machine as a kind of money transmission (four) is widely used in each = port / = to make the projector's functions diversified 'already integrated projectors and & shirts like playback tools Together, the projector is provided with a video playback function, whereby the projector can play the image data by means of projection, or the image data can be outputted by the external-display device and displayed on the display device, however, Because the projector performs image projection and DVD image input/output in parallel 'When the projector is connected to the __ display device for image playback, the projector itself will also project the image at the same time, which is not conducive to saving resources. At the same time, it causes light pollution and affects the display effect of the image. [Invention content] In view of this, it is necessary to provide a method for energy-saving control and energy-saving control method. A projector includes an image data reading controller, an image data processing controller, a control panel, a light source driving controller, and an image frequency output interface. The image data reading controller is configured to read the image data and configure the material amount to input the format. The material data processing controller is configured to receive the image data output by the image data reading controller, and digitize the image data and transmit the image data to the control panel. The control panel is configured to receive the image data and generate a pulse wave corresponding to the image data, and transmit the amplitude pulse wave to the light source driving controller. The light source driving controller controls the projector photo-opening timing and the opening_ according to the pulse wave outputted by the control panel. The (4) machine also includes an image synchronization device and a micro processing controller. The image synchronization detector is configured to: _ image frequency output connection α to output a synchronization signal, and transmit the measurement result to the micro processing controller. (4) Handling (4) (4)
❹ 根據影頻时制H所輸出之偵測結果輸出禁能或致能訊 號至光源驅動控制器關閉或者開啟投影機光源同時控辟 像資料讀取控制器配置影像輸出格式。 ^ -種投影機之節能控制方法，其包括以下步驟： 開啟投影機，該投影機包括—影像資料讀取控制器、 影像資料處理控制器、-控制面H源 器 影像頻輸出接口、-影頻同步偵測器以及—微處理控制 微處理控制器初始化投影機内用於影像處理 所有相關元件； 微處理控制器發出致能訊號至光源驅動控制 啟投影機光源； ％ 微處理控制器控制影像資料讀取… 格式為㈣傳輸格式，·取控制^定影像輸出 微處理控制器監控由影頻同步偵測器輸出之偵 號，並根據其偵測訊號發出相應之控制指令，當，瓶於 出接口無同步訊號輸出日夺，表明影像#_輸^ ^ 子之接入而中斷； 、hi知 201007332输出 According to the detection result outputted by the video time system H, the output disable or enable signal to the light source drive controller to turn off or turn on the projector light source and control the image data read controller to configure the image output format. ^ - A kind of projector energy-saving control method, comprising the following steps: Turn on the projector, the projector includes - image data reading controller, image data processing controller, - control surface H source image frequency output interface, - shadow The frequency synchronization detector and the micro-processing control micro-processing controller initialize all relevant components for image processing in the projector; the micro-processing controller sends an enable signal to the light source to drive control to start the projector light source; and the micro-processing controller controls the image data Read... The format is (4) transmission format, · take control ^ fixed image output micro-processing controller monitors the detection signal output by the image synchronization detector, and sends corresponding control commands according to the detection signal, when the bottle is out The interface has no synchronization signal output, which indicates that the image #_输^^ is connected and interrupted; hi, know 201007332
微處理控制器發出禁能訊號至光源驅動控制器關 影機光源及風扇電源，· X 微處理控制器控制影像資料讀取控制器設 *格式為外部傳輸影像格式； ，、像掏出 ”微處理控制器監控由影頻同步偵測器輸出之偵測訊 號，並根據其偵測訊號發出相應之控制指令，當影像 出接口有同步訊號輪出時，微處理控制器發出致能訊號」 光源驅動控制器控制開啟投影機光源。 ❹ 純先前技術，本發明投影機及其節能控制方 -與所述影像頻輸出接口電連接之影頻同步偵測器來偵測 所述影像頻輸出接口處是否有外部端子插入，從而控制投 影機藉由影像頻輸出接口將影像資料輸出至外部顯^ 時能夠藉由微處理控制器控制光源驅動控制器自動關閉投 影機光源達到節能同時降低光污染之目的。 【實施方式】 ❹ 料_ 1 ’本發明較佳實施方式提供之—種投影機 200,該投影機200包括—影像資料讀取控制器训、一影 像資料處理控制器220、一控制而祐/ 衩制面板230、一光源驅動控制 器240、一影像頻輸出接口 25〇、一 衫頻冋步偵測器260以 及一微處理控制器270。 所述影像資料讀取控制器⑽與所述影像資料處理控 制器22G相f連接。該影像:#料讀取控制器训用以獲取 影像資料’所《彡像資料可以存儲在可移動存儲裝置中， 如快閃記憶體、移動硬碟、光碟等存儲媒介中。該影像資 201007332 料讀取控制器210獲取影像資料後，根據微處理器270之 控制指令動態配置影像輸出格式如内部傳輸影像格式或者 • 外部傳輸影像格式。該影像資料讀取控制器210包括第一 • 影像輸入埠211、第二影像輸入埠212、第一影像輸出埠 213、第二影像輸出埠214及第三影像輸出埠215，且該影 像資料讀取控制器210藉由其第一、二、三影像輸出埠 213、214、215與所述影像資料處理控制器220相電連接。 所述第一、二影像輸入埠211、212用以接收影像資料之輸 ❹入，該影像資料可以由快閃記憶體（Flash Memory)、USB、 SD、DSC、DV、MP3等影像資料存儲裝置輸出。該影像讀 取資料控制器210藉由第一、二影像輸入埠211、212接收 影像資料，並對所述影像資料配置相應之輸出格式後藉由 所述第一、二、三影像輸出埠213、214、215將所述影像 資料輸出至影像資料處理控制器220。其中，該影像讀取資 料控制器210可以支援MPEG-1、MPEG-2、MPEG-4、 ^ JPEG/Μ、RealVideo解碼；支援影視訊格式*.rm、*.rmvb及 AVOS ;並支持USB ;快閃記憶卡；數碼相機；MP3 Player ; 亦可外接解調器（Demodulator)支援DVB-T、DMB-T;數 位多媒體電視等訊號輸入格式。所述第一影像輸出埠213 可用以輸出數位電視之色度訊號Pr/Pb或電腦之色度訊號 R/B;所述第二影像輸出埠214可用以輸出數位電視之亮度 訊號Y或電腦之色度訊號G ;所述第三影像輸出埠215可 用以輸出數位電視之色度訊號Pb/Pr或電腦之色度訊號 B/R。 201007332 所述影像資料處理控制器220用以接收所述影像資料 讀取控制器210所輸出之影像資料，並對所述影像資料進 行數位化處理後藉由其電連接至控制面板230之輸出埠 • 223將處理後之影像資料傳輸至控制面板230。可以理解， 該影像資料處理控制器220除了可接收由所述影像資料讀 取控制器210輸出之影像資料外，還可以藉由其影像輸入 埠221、222直接接收如多媒體電視、電腦等其他影像設備 之影像訊號，並將所接收到之影像訊號經過數位化處理後 ❹輸出至控制面板230。 所述控制面板230與所述影像資料處理控制器220之 輸出埠223相電連接，並接收由所述輸出埠223輸出之影 像資料。當該控制面板230接收由所述輸出埠223輸出之 影像資料後，經過其内部之運算器產生與所述影像資料相 對應之幀幅脈波，並將該幀幅脈波輸出至光源驅動控制器 240供所述光源驅動控制器240根據所述幀幅脈波控制投 _影機光源之開啟時序及開啟時間。 所述光源驅動控制器240分別與所述控制面板230及 微處理控制器270相電連接。該光源驅動控制器240根據 微處理控制器270之輸出訊號控制是否開啟投影機光源（圖 未標），並根據控制面板230輸出之幀幅脈波控制投影機光 源之開啟時序及開啟時間。 所述影像頻輸出接口 250與所述影像資料讀取控制器 210相電連接並將所述影像資料讀取控制器210讀取並經 處理後之影像訊號輸出。該影像頻輸出接口 250包括第一 201007332 内部接點251及第二内部接點252，該第一、二内部接點 251、252在常態下處於連通狀態，其中常態是指沒有外部 . 端子插入該影像頻輸出接口 250中之狀態。該影像頻輸出 . 接口 250分別與所述影像資料讀取控制器210之第二、第 三影像輸出埠214、215相電連接。其中，所述第一内部接 點251與所述影像資料讀取控制器210之第二影像輸出埠 214相電連接，所述第二内部接點252與所述影頻同步偵測 器260相電連接並將所述第二影像輸出埠214之同步訊號 ❹傳輸給所述影頻同步偵測器260。 所述影頻同步偵測器260用以偵測所述影像頻輸出接 口 250之第二内部接點252是否輸出同步訊號，並將其偵 測結果傳輸給所述微處理控制器270。當影像頻輸出接口 250之第一内部接點251與第二内部接點252連接在一起 時，所述影頻同步偵測器260輸出低電平，當影像頻輸出 接口 250之第一内部接點251與第二内部接點252斷開時， @則所述影頻同步偵測器260輸出高電平。該影頻同步偵測 器260可以是一高阻抗上拉電阻。 所述微處理控制器270用以接收所述影頻同步偵測器 260所發出之偵測結果，並根據其偵測結果發出致能訊號或 禁能訊號至光源驅動控制器240開啟或者關閉投影機光源 及風扇（圖未示）電源，同時控制影像資料讀取控制器210 配置影像輸出格式。該微處理控制器270内還可設置一模 數轉換器（ADC)將不同之電平訊號轉換成為不同之數位 訊號。可以定義高電平對應之數位訊號大於128，而低電平 11 201007332 對應之數位訊號小於128。 .右投影機200之過程令，影像頻輸出接口 250 有時’亦即當有外部端子插 接口 250中眸，新、+、贫 p像頻翰出 目I会Μ + 卩接點251與第二㈣接點252 則會被所述外部端子強制斷開，亦即 == 點⑸、252呈開路㈣ 7内料 接點251、252之Η㈣ 了❼«在第一 '第二内部 ❹ 不到録連接之第影頻同步偵測器260此時就偵測 不幻二、連接之第一内部接點说之同步訊號， 與 像資料藉由插在所述f彡H # 、如 出至外部裝置如顯示幕上顯+ π ^ 卜#端子輸 〜顯不’同時，由於影頻同步偵測 盗260偵測不到第二内部 m ^ 平^" 52之同步訊號而輸出高電 平訊號’所述微處理控制哭 之俏制妹I恭山枯 制时270根據影頻同步偵測器260 、“、口 "不旎讯號至所述光源驅動控制器240使所 述光源驅動控制器240舻μ马：；《； Αμ 更斤 根據該禁施訊號關閉所述投影機光 ❹ :二f電源。相反地，如果沒有外部端子插在所述影像 頻輸出接口 250時，所诚筮 冢 m n结 迷第―、第二内部接點251、252相 互連通，且第一内部接點252 偵測器260,該影頻同步偵制哭。 遽傳輸―頻同步 少偵利器260接收到所述同步訊號德 低電平訊號，所述微處理控制器27〇根據影頻同 2測器鳩之债測結果發出致能訊號至所述光源驅動控 :。240使所述光源驅動控制器24〇根據該致能訊 所述投影機光源及風扇電源。 本發明投影機採用一影頻同步偵測器來制影像頻輸 出接口處是否有影像資料輸出，從而控制投影機藉由影像 12 201007332 頻輸出接口將影像資料輸出至外部顯示裝置時，能夠藉由 微處理控制器控制光源驅動控制器自動關閉投影機光源達 到節能同時降低光污染之目的。 ' 可以理解，本發明中，所述影像資料讀取控制器210 之第二影像輸出埠214亦可僅與影像頻輸出接口 250内之 第一内部接點251相電連接，在常態下與第一内部接點251 相電連接之第二内部接點252同時與所述影像資料處理控 制器220及影頻同步偵測器260相電連接，如此，可進一 ®步保證當有外部端子插入所述影像頻輸出接口 250内時， 所述第一、二内部接點251、252相互斷開，藉由該第一、 二内部接點215、252與所述影像資料處理控制器220相電 連接之第二影像輸出埠214斷開，此時影像資料處理控制 器220不能接受第二影像輸出埠214輸出之影像資料，從 而無法輸出可供控制面板230處理之完整影像資料，對應 之所述光源驅動控制器240亦不會工作從而進一步確保該 @投影機200在將影像資料輸出至外部顯示裝置之時候其投 影機光源可自動關閉。 請參閱圖2, 一種投影機節能控制方法包括以下步驟： S110投影機開機，且微處理控制器270初始化投影機 内用於影像處理及傳輸之所有相關元件； S120微處理控制器270發出致能訊號至光源驅動控 制器240控制開啟投影機光源及風扇電源； S130微處理控制器270控制影像資料讀取控制器210 設定影像輸出格式為内部傳輸影像格式； 13 201007332 ' S140微處理控制器270監控由影頻同步偵測器260輸 出之偵測訊號，並根據其偵測訊號發出相應之控制指令， * 本實施方式中所述影頻同步偵測器260輸出之是電平訊 ' 號，當影像頻輸出接口 250無同步訊號輸出時，表明影像 資料傳輸由於外部端子之接入而中斷，所述電平訊號為高 電平； S150微處理控制器270發出禁能訊號至光源驅動控 制器240關閉投影機光源及風扇電源； ❹ S160微處理控制器270控制影像資料讀取控制器210 設定影像輸出格式為外部傳輸影像格式； S170微處理控制器270監控由影頻同步偵測器260輸 出之偵測訊號，並根據其偵測訊號發出相應之控制指令， 當影像頻輸出接口 250有同步訊號輸出時，表明外部端子 移除，所述電平訊號由高電平轉換為低電平，此時返回步 驟 S120。 _ 可以理解當所述微處理控制器270内設置有模數轉換 器時，請參閱圖3，所述投影機節能控制方法包括以下步驟： S310投影機開機，且微處理控制器270初始化投影機 内用於影像處理及傳輸之所有相關元件； S320微處理控制器270發出致能訊號至光源驅動控 制器240控制開啟投影機光源及風扇電源； S330微處理控制器270控制影像資料讀取控制器210 設定影像輸出格式為内部傳輸影像格式； S340微處理控制器270監控由影頻同步偵測器260輸 14 201007332 出之電平訊號，並將該訊號轉換為數位訊號，判斷該數位 ，訊號是大於或者是小於128，若數位訊號大於128，則表明 影像資料傳輸由於外部端子之接入而中斷； . σδ35〇微處理控制器270發出禁能訊號至光源驅動控 制器240關閉投影機光源及風扇電源； S360微處理控制器27〇控制影像資料讀取控制器21〇 設定影像輸出格式為外部傳輸影像格式； S370 Μ處理控制器270監控由影頻同步偵測器26〇輸 出之電平訊號，並將該訊號轉換為數位訊號，判斷該數位 訊號是大於或者是小於128，若數位訊號小於128，表明外 部端子移除，此時返回步驟S320。 綜上所述，本發明確已符合發明專利之要件，遂依法 提出專利申請。惟，以上所述者僅為本發明之較佳實施方 式，自不能以此限制本案之申請專利範圍。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 ❹應涵蓋於以下申請專利範圍内。 【圖式簡單說明】 圖1係本發明較佳實施方式提供之一種投影機之功能 模組圖； 圖2係圖1中投影機之第一實施方式之節能控制方法 流程圖； 圖3係圖1中投影機之第一實施方式之節能控制方法 流程圖。 【主要元件符號說明】 201007332 投影機 200 影像資料讀取控制器 210 第一影像輸入埠 211 第二影像輸入埠 212 第一影像輸出埠 213 第二影像輸出埠 214 第三影像輸出埠 215 影像資料處理控制器 220 影像輸入埠 221 、 222 輸出埠 223 控制面板 230 光源驅動控制器 240 影像頻輸出接口 250 第一内部接點 251 第二内部接點 252 ❿ 影頻同步偵測器 260 微處理控制器 270 16The microprocessor controller sends a disable signal to the light source to drive the controller to turn off the light source and the fan power supply. · The X microprocessor controller controls the image data reading controller to set the format to an externally transmitted image format. The processing controller monitors the detection signal output by the image synchronization detector and sends a corresponding control command according to the detection signal. When the image output interface has a synchronous signal, the microprocessor controller sends an enable signal. The drive controller controls to turn on the projector light source. ❹ Pure prior art, the projector of the present invention and its energy-saving control device - an image sync detector electrically connected to the image frequency output interface to detect whether an external terminal is inserted at the image frequency output interface, thereby controlling projection By outputting the image data to the external display through the image frequency output interface, the micro-controller can control the light source to drive the controller to automatically turn off the projector light source to save energy and reduce light pollution. [Embodiment] The present invention provides a projector 200. The projector 200 includes a video data reading controller, an image data processing controller 220, and a control device. The panel 230, a light source driving controller 240, an image frequency output interface 25A, a shirt frequency step detector 260, and a microprocessor controller 270. The image data reading controller (10) is coupled to the image data processing controller 22G. The image: #料读控制器培训 is used to acquire image data. The image data can be stored in a removable storage device, such as a flash memory, a mobile hard disk, a compact disk or the like. After the image reading controller 210 acquires the image data, the image reading controller 210 dynamically configures the image output format such as the internal transmission image format or the external transmission image format according to the control instruction of the microprocessor 270. The image data reading controller 210 includes a first image input port 211, a second image input port 212, a first image output port 213, a second image output port 214, and a third image output port 215, and the image data is read. The controller 210 is electrically connected to the image data processing controller 220 by its first, second, and third image output ports 213, 214, and 215. The first and second image input ports 211 and 212 are configured to receive input data of the image data, and the image data may be an image data storage device such as a flash memory, a USB, an SD, a DSC, a DV, or an MP3. Output. The image reading data controller 210 receives the image data by using the first and second image input ports 211 and 212, and configures the corresponding output format for the image data, and then outputs the first, second, and third image images. And 214 and 215 output the image data to the image data processing controller 220. The image reading data controller 210 can support MPEG-1, MPEG-2, MPEG-4, ^ JPEG/Μ, RealVideo decoding; support video format *.rm, *.rmvb and AVOS; and support USB; Flash memory card; digital camera; MP3 Player; external demodulator (Demodulator) supports DVB-T, DMB-T; digital multimedia TV and other signal input formats. The first image output port 213 can be used to output a chrominance signal Pr/Pb of a digital television or a chrominance signal R/B of a computer; the second image output port 214 can be used to output a brightness signal Y of a digital television or a computer. The chrominance signal G; the third image output port 215 can be used to output the chrominance signal Pb/Pr of the digital television or the chrominance signal B/R of the computer. The image data processing controller 220 is configured to receive the image data output by the image data reading controller 210, and perform digital processing on the image data to be electrically connected to the output of the control panel 230. • 223 transmits the processed image data to the control panel 230. It can be understood that the image data processing controller 220 can receive the image data output by the image data reading controller 210, and can directly receive other images such as multimedia televisions and computers through the image input ports 221 and 222. The image signal of the device is digitally processed and output to the control panel 230. The control panel 230 is electrically connected to the output port 223 of the image data processing controller 220, and receives image data output by the output port 223. After receiving the image data output by the output port 223, the control panel 230 generates a frame pulse wave corresponding to the image data through an internal computing unit, and outputs the frame pulse wave to the light source driving control. The device 240 is configured to, by the light source driving controller 240, control an opening timing and an opening time of the projector light source according to the frame pulse wave. The light source driving controller 240 is electrically connected to the control panel 230 and the micro processing controller 270, respectively. The light source driving controller 240 controls whether to turn on the projector light source according to the output signal of the microprocessor controller 270 (not shown), and controls the opening timing and the opening time of the projector light source according to the frame pulse wave outputted by the control panel 230. The image frequency output interface 250 is electrically connected to the image data reading controller 210 and outputs the processed image signal read by the image data reading controller 210. The image frequency output interface 250 includes a first 201007332 internal contact 251 and a second internal contact 252. The first and second internal contacts 251, 252 are in a normal state in a normal state, wherein the normal state means no external. The state in the image frequency output interface 250. The image frequency output interface 250 is electrically connected to the second and third image output ports 214 and 215 of the image data reading controller 210, respectively. The first internal contact 251 is electrically connected to the second image output port 214 of the image data reading controller 210, and the second internal contact 252 is coupled to the image sync detector 260. The electrical connection and the synchronization signal 所述 of the second image output port 214 are transmitted to the image synchronization detector 260. The image synchronization detector 260 is configured to detect whether the second internal contact 252 of the image frequency output interface 250 outputs a synchronization signal, and transmit the detection result to the microprocessor controller 270. When the first internal contact 251 of the image frequency output interface 250 is connected to the second internal contact 252, the image synchronization detector 260 outputs a low level when the first internal connection of the image frequency output interface 250 When the point 251 is disconnected from the second internal contact 252, the image sync detector 260 outputs a high level. The image sync detector 260 can be a high impedance pull up resistor. The microprocessor controller 270 is configured to receive the detection result sent by the image synchronization detector 260, and send an enable signal or a disable signal to the light source driving controller 240 to turn the projection on or off according to the detection result. The machine light source and the fan (not shown) are powered, and the image data reading controller 210 is controlled to configure the image output format. An analog-to-digital converter (ADC) can also be provided in the microprocessor controller 270 to convert different level signals into different digital signals. It can be defined that the digital signal corresponding to the high level is greater than 128, and the digital signal corresponding to the low level 11 201007332 is less than 128. The process of the right projector 200 makes the video frequency output interface 250 sometimes 'that is, when there is an external terminal plug-in interface 250, new, +, poor p-images will appear Μ 卩 卩 251 251 251 The second (four) contact 252 will be forcibly disconnected by the external terminal, that is, == point (5), 252 is open (four) 7 inner contact 251, 252 (four) ❼ «in the first 'second internal ❹ less than The video frequency synchronization detector 260 of the recording connection detects the synchronization signal at the first internal connection of the connection, and the image data is inserted into the f彡H#, such as to the outside. If the device is on the display screen, the display is + π ^ 卜 # terminal input ~ display no ' at the same time, because the image synchronization detection thief 260 can not detect the second internal m ^ level ^ " 52 synchronization signal and output high level signal 'The micro-processing control crying beauty sister I gongshan 270 according to the image sync detector 260, ", mouth " no signal to the light source drive controller 240 to drive the light source 240舻μ马:; "; Αμ more jin according to the forbidden signal to turn off the projector diaphragm: two f power supply. Conversely, if not When the external terminal is inserted into the video frequency output interface 250, the first and second internal contacts 251 and 252 are connected to each other, and the first internal contact 252 is detected by the detector 260. The image is synchronized. Detecting the crying. The 遽 transmission-frequency synchronization less Detector 260 receives the synchronization signal low-level signal, and the microprocessor controller 27 sends an enable signal according to the debt measurement result of the video and the detector. The light source driving control: 240 causes the light source driving controller 24 to output the projector light source and the fan according to the enabling signal. The projector of the invention adopts a video synchronous detector to form an image frequency output interface. Whether there is image data output, so that when the projector outputs the image data to the external display device through the image 12 201007332 frequency output interface, the light source driving controller can be controlled to automatically turn off the projector light source to save energy and reduce light pollution. For the purpose of the present invention, the second image output port 214 of the image data reading controller 210 can also be the first one in the image frequency output interface 250. The contact point 251 is electrically connected, and the second internal contact 252 electrically connected to the first internal contact 251 in the normal state is simultaneously electrically connected to the image data processing controller 220 and the image sync detector 260. Further, it can be ensured that when the external terminal is inserted into the image frequency output interface 250, the first and second internal contacts 251, 252 are disconnected from each other by the first and second internal contacts 215, 252. The second image output port 214 electrically connected to the image data processing controller 220 is disconnected. At this time, the image data processing controller 220 cannot receive the image data output by the second image output port 214, so that the control panel cannot be output. The complete image data processed by 230, corresponding to the light source driving controller 240, also does not work to further ensure that the projector light source can be automatically turned off when the @projector 200 outputs the image data to the external display device. Referring to FIG. 2, a projector energy-saving control method includes the following steps: S110 projector is powered on, and the microprocessor controller 270 initializes all relevant components for image processing and transmission in the projector; S120 micro-processing controller 270 sends an enable signal The light source driving controller 240 controls to turn on the projector light source and the fan power; the S130 micro processing controller 270 controls the image data reading controller 210 to set the image output format to the internal transmission image format; 13 201007332 'S140 micro processing controller 270 monitors The image sync detector 260 outputs a detection signal and sends a corresponding control command according to the detection signal. * The image sync detector 260 outputs a level signal in the embodiment. When the frequency output interface 250 has no synchronization signal output, it indicates that the image data transmission is interrupted due to the access of the external terminal, and the level signal is high level; the S150 microprocessor controller 270 issues the disable signal to the light source driving controller 240 to turn off. Projector light source and fan power supply; ❹ S160 microprocessor controller 270 controls image data reading controller 210 to set image The output format is an external transmission image format; the S170 micro-processing controller 270 monitors the detection signal output by the image synchronization detector 260, and sends a corresponding control command according to the detection signal, and the image frequency output interface 250 has a synchronization signal. When outputting, it indicates that the external terminal is removed, and the level signal is converted from a high level to a low level, and the process returns to step S120. _ It can be understood that when the analog-to-digital converter is disposed in the microprocessor controller 270, referring to FIG. 3, the projector energy-saving control method includes the following steps: S310 the projector is powered on, and the microprocessor controller 270 initializes the projector. All relevant components for image processing and transmission; S320 microprocessor controller 270 sends an enable signal to light source drive controller 240 to control the projector light source and fan power; S330 microprocessor controller 270 controls image data read controller 210 The image output format is set to the internal transmission image format; the S340 micro-processing controller 270 monitors the level signal output by the image synchronization detector 260, and converts the signal into a digital signal, and determines the digit, the signal is greater than Or less than 128, if the digital signal is greater than 128, it indicates that the image data transmission is interrupted due to the access of the external terminal; σδ35〇 The microprocessor controller 270 issues a disable signal to the light source driving controller 240 to turn off the projector light source and the fan power supply. The S360 microprocessor controller 27 controls the image data reading controller 21 to set the image output format to The transmission image format is transmitted; the S370 processing controller 270 monitors the level signal outputted by the image synchronization detector 26, and converts the signal into a digital signal to determine whether the digital signal is greater than or less than 128, if the digital signal If it is less than 128, it indicates that the external terminal is removed, and the process returns to step S320. 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 it is not possible to limit the scope of the patent application of the present invention. Equivalent modifications or variations made by persons skilled in the art in light of the spirit of the invention are intended to be included within the scope of the following claims. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a functional block diagram of a projector provided by a preferred embodiment of the present invention; FIG. 2 is a flow chart of a power saving control method of a first embodiment of the projector of FIG. 1; A flow chart of the energy saving control method of the first embodiment of the projector in the first embodiment. [Main component symbol description] 201007332 Projector 200 Image data reading controller 210 First image input port 211 Second image input port 212 First image output port 213 Second image output port 214 Third image output port 215 Image data processing Controller 220 image input 埠 221 , 222 output 埠 223 control panel 230 light source drive controller 240 image frequency output interface 250 first internal contact 251 second internal contact 252 影 image sync detector 260 microprocessor controller 270 16