1299428 九、發明說明： 【發明所屬之技術領域】 影 本發明係關於— 機投射的影像為正 種光控裝置，特別係關於 立影像之光控裝置。 一種控制投 【先前技術】 /受到科技的進步，資源環保意識的抬頭等各種因素的 影響’各種設備皆有小型化的趨勢。以投影機為例來說， 相較於數年前體積I大的落地型機種，ί見纟已發展出體積 小重量輕可隨身攜帶，且解析度、亮度、投影面積等性能 更佳的新型機種。且顧慮其使用空間的限制，放置方式亦 不僅限於平放式機種，而出現了兼可倒掛的機種，藉由投 'V機本體或遙控器的設定，使投影機的影像皆維持於正立 的影像輸出。 因使用環境等情況的改變必須變更投影機的擺設，例 如由原本的平放擺設變更為倒掛擺設，此時，必須重新設 疋輸出影像為正立影像。一般的設定步驟，首先於未變更 擺設的平放狀態下開啟投影機，使其投射正立影像以便於 目視操作，接著設定輸出影像為倒立影像，之後再將投影 機倒掛放置，使倒掛的投影機投射出正立的影像。欲將倒 掛狀態中的投影機恢復平放擺設時，亦必需重新設定投射 影像。如使用者對於投影機的功能設定不熟悉時，還必須 參閱使用手冊或說明書進行設定，且每次的變更擺設皆必 須重新設定，實為不便。 5 1299428 【發明内容】 因此，本發明係提供一種光控裝置，自動地判斷投影 機的擺設狀態而投射出正立的影像。 為達成上述目的，本發明之光控裝置，係應用於一投 影機，光控裝置位於投影機内，包含一開孔、一擔片以及 一光感應器。開孔係位於光控裝置殼體上，使光線通過開 孔而進入光控裝置。擋片係可動地設於開孔上，以改變由 開孔進入光控裝置的光量。光感應器係位於光控裝置内， 光線射入光控裝置之光路徑上，以接收光線進入開孔的光 量’藉以改變投影機投射影像之旋轉角度。 其中’擋片係為一可藉由重力方式於開孔上移動之擋 片’擔片可為一沿軌道滑移之擋片亦可為一轉動之擋片。 當擔片係覆蓋開孔時，投影機呈第一個擺放位置，當擋片 係未覆蓋開孔時，投影機呈第二個擺放位置，而第二擺放 位置與第一擺放位置係之互相倒置的關係。投射影像之旋 轉角度係為0度及1 8 0度。擋片係設於開孔上，擋片覆蓋 開孔之面積與光感應器受光之光量成反比。擋片係為一重 力式擋片’改變投影機之擺放位置同時可改變播片覆蓋開 孔之面積。而投影機之投射影像係為一正立影像。 另外’本發明係提供一種光控方法，開啟投影機之電 源後’光感應器感應所接收到之光量，從光感應器傳送一 訊號至投影機，改變其投射影像之旋轉角度。光感應器接 收到光量後，判定投影機擺設角度，藉以傳送不同之訊號 1299428 至投影機’使投影機投射中庀#夕旦/多 例仅町正立之影像。而光控方法更可 提示檢查投影機擺設是否傾斜。 【實施方式】 以下將以圖式及詳細說明清楚說明本發明之精神，如 熟悉此技術之人員在瞭解本發明之較佳實施例後，當可由 本發明所教示之技術，加以改變及修飾，其並不脫離本發 明之精神與範圍。 如第1圖與第2圖所示，本發明之光控裝置2〇〇係位 於一投影機100内，投影機100之光源所射出的光可照射 到的位置’其中光源所射出的光包含可見光與不可見光。 光控裝置200包含一開孔21〇、一擔片220以及一光感應 器230。開孔210位於光控裝置2〇〇殼體上，使光進入光 控裝置200。擋片220位於開孔210上，擋片220藉由重 力的關係而落下，覆蓋開孔210遮蔽光線，或者開啟開孔 210使光線進入光控裝置2〇〇。光感應器23〇位於光控裝 豈200内，且位於進入光控裝置_ 2〇〇.的光線照射到的位 置’光感應器230可使用可見光的光感應器，亦可使用不 可見光的光感應器。 如平放擺設的角度設為〇。，則當投影機丨00平放擺 設（〇 ° )時，如第1圖所示，擋片220因重力的關係落下 而覆蓋開孔210，遮蔽光線進入光控裝置200内。位於光 控裝置200内之光感應器23〇未感應到光而傳送一訊號， 投影機1 00即以正立之影像投射於螢幕。 1299428 田才又衫機1 00倒掛時，則相對於平放擺設（〇。）時旋 轉180。，如第2圖所示，播片22G因重力的關係落下而 開啟開孔210,使光線進入光控裝置2〇〇内，光感應器 感應到光傳送另一訊號觸發投影機1〇〇投射倒立的影 、 像而奴衫機10 〇亦處於倒掛的情況下，因此投射於螢幕 一 上之影像即亦為一正立影像。 本發明的技術思想範圍内可進行各式各樣的應用實 _ 施例如，上述實施例係設定投影機1 00於平放狀態時， f幵1孔210受到遮蔽，光感應器23〇為未受光的情況，但亦 :設定投影機100於平放狀態時，開1 21G開啟，光感應 器230為受光的情況。為避免因震動、灰塵遮蔽開孔 等因素k成光感應器230訊號的瞬間改變而影響投射出 的影像瞬間的正反顛倒，可設定光感應器23〇受光或未受 光經過一段適當的時間，例如丨〜5秒鐘，才會改變信號， 使投影機100輸出影像。 私另外，光感應器230亦可感應從開孔21〇進入之光的 亮度（光量），亦即檔片22〇覆蓋開孔21〇之面積與光感 應器230之受光量成反比。當投影機；1 〇〇岡、J開機時，投影 機之光源發出-預定亮度之光，如開孔210為全開狀態， 則光感應器230感應1〇〇%的亮度（光量），如開孔21〇 為全閉狀態，則光感應器23〇感應〇%的亮度（光量）。 因投影機100的擺設方式可為平放與倒掛的擺設，如投影 機100的擺設傾斜時，則播片220無法完全遮蔽或開啟開 孔21〇,造成光控裝置2〇〇内的漏光或是亮度不足，此時 1299428 光感應器230即傳送一訊號提示使用者檢查投影機loo的 擺設。以上述實施例來說，當投影機1 〇〇平放擺設時，開 孔210受到遮蔽，光感應器230感應0%的亮度（光量）， 但如投影機100的擺設傾斜造成開孔21 0未完全封閉而漏 光時，光感應器230感測到超過一預定值，例如超過1〇 %的亮度（光量）時，即傳送一訊號提示使用者檢查投影 機1 〇〇的擺設。相同的，當投影機1 〇〇倒掛擺設時，開孔1299428 IX. Description of the Invention: [Technical Field of the Invention] The present invention relates to a machine-projected image as a positive light control device, and more particularly to a light control device for a vertical image. A kind of control investment [Prior technology] / The advancement of technology, the rise of resources and environmental awareness, and other factors have affected the trend of miniaturization of various devices. Taking the projector as an example, compared with the floor-standing model with a large volume I a few years ago, ί see has developed a new type of small size, light weight and light carrying, and better performance, resolution, brightness, and projected area. Model. And depending on the limitation of the space in which it is used, the placement method is not limited to the flat-type model, but there is a model that can be upside down. By setting the 'V machine body or the remote controller, the image of the projector is maintained in an upright position. Image output. The projector must be changed due to changes in the environment, for example, from the original flat display to the upside down display. In this case, the output image must be reset to an upright image. In the general setting procedure, first turn on the projector in the flat state without changing the display, make it project the erect image for visual operation, then set the output image as the inverted image, and then place the projector upside down to make the projection upside down. The machine projects an erect image. It is also necessary to reset the projected image when you want to restore the projector in the reverse state to the flat position. If the user is unfamiliar with the projector's function settings, it must also refer to the user manual or manual for setting, and each change must be reset, which is inconvenient. 5 1299428 SUMMARY OF THE INVENTION Accordingly, the present invention provides a light control device that automatically determines the state of the projector and projects an erect image. In order to achieve the above object, the light control device of the present invention is applied to a projector, and the light control device is located in the projector and includes an opening, a supporting piece and a light sensor. The opening is located on the housing of the light control device, and the light enters the light control device through the opening. The flap is movably disposed on the opening to change the amount of light entering the light control device from the opening. The light sensor is located in the light control device, and the light is incident on the light path of the light control device to receive the light amount of light entering the opening to change the rotation angle of the projected image of the projector. The baffle is a baffle that can be moved by gravity on the opening. The brace can be a track that slides along the track or can be a rotating baffle. When the stretcher covers the opening, the projector is placed in the first position. When the blank does not cover the opening, the projector is placed in the second position, and the second position is placed in the first position. The relationship between positional inversions. The rotation angle of the projected image is 0 degrees and 180 degrees. The baffle is disposed on the opening, and the area of the baffle covering the opening is inversely proportional to the amount of light received by the photosensor. The flap is a heavy-duty flap' that changes the placement of the projector while changing the area of the opening that covers the opening. The projected image of the projector is an erect image. In addition, the present invention provides a light control method, in which the light sensor senses the amount of light received after turning on the power of the projector, and transmits a signal from the light sensor to the projector to change the rotation angle of the projected image. After the light sensor receives the light amount, it determines the angle at which the projector is placed, so as to transmit a different signal 1299428 to the projector' so that the projector projects the image in the middle of the day. The light control method can also prompt to check if the projector is tilted. The embodiments of the present invention will be apparent from the following description of the preferred embodiments of the invention. It does not depart from the spirit and scope of the invention. As shown in FIGS. 1 and 2, the light control device 2 of the present invention is located in a projector 100, and the light emitted by the light source of the projector 100 can be irradiated to a position where the light emitted by the light source includes Visible light and invisible light. The light control device 200 includes an opening 21, a support 220, and a light sensor 230. The opening 210 is located on the housing of the light control device 2 to allow light to enter the light control device 200. The flap 220 is located on the opening 210, and the flap 220 is dropped by a gravity relationship, covering the opening 210 to shield the light, or opening the opening 210 to allow the light to enter the light control device 2''. The light sensor 23 is located in the light control device 200 and is located at a position where the light entering the light control device _ 2 〇〇. The light sensor 230 can use a visible light sensor or an invisible light. sensor. For example, the angle of the flat display is set to 〇. When the projector 丨00 is placed flat (〇 ° ), as shown in Fig. 1, the flap 220 is dropped by gravity to cover the opening 210, and the shielding light enters the light control device 200. The light sensor 23 located in the light control device 200 transmits a signal without sensing the light, and the projector 100 projects the image in an upright position on the screen. 1299428 When the Tiancai machine is upside down, it will rotate 180 when it is placed flat (〇.). As shown in FIG. 2, the broadcast piece 22G falls due to the gravity and opens the opening 210, so that the light enters the light control device 2, and the light sensor senses that the light transmits another signal to trigger the projector to project. The inverted image, like the slave machine 10 is also upside down, so the image projected on the screen is also an erect image. A wide variety of applications can be implemented within the scope of the technical idea of the present invention. For example, in the above embodiment, when the projector 100 is placed in a flat state, the f幵1 hole 210 is shielded, and the light sensor 23 is not In the case of receiving light, but also setting the projector 100 to be in the flat state, the opening 1 21G is turned on, and the light sensor 230 is receiving light. In order to avoid the momentary change of the signal of the light sensor 230 caused by the vibration, the dust shielding opening, etc., the positive and negative reversal of the projected image moment may be affected, and the light sensor 23 may be set to receive or not receive light for a suitable period of time. For example, 丨~5 seconds, the signal is changed, and the projector 100 outputs an image. In addition, the light sensor 230 can also sense the brightness (light quantity) of the light entering from the opening 21, that is, the area of the shutter 22 〇 covering the opening 21 成 is inversely proportional to the amount of light received by the light sensor 230. When the projector is turned on, the light source of the projector emits light of a predetermined brightness. If the opening 210 is in the fully open state, the light sensor 230 senses 1% brightness (light quantity), such as When the hole 21 is in the fully closed state, the light sensor 23 detects the brightness (light amount) of 〇%. Because the display manner of the projector 100 can be flat and upside down, if the display of the projector 100 is tilted, the broadcast piece 220 cannot completely block or open the opening 21〇, causing light leakage in the light control device 2 or If the brightness is insufficient, the 1299428 light sensor 230 transmits a signal to prompt the user to check the display of the projector loo. In the above embodiment, when the projector 1 is placed flat, the opening 210 is shielded, and the light sensor 230 senses 0% brightness (light quantity), but if the projector 100 is tilted, the opening 21 0 is caused. When the light sensor 230 is not completely closed and leaks light, the light sensor 230 senses a brightness exceeding a predetermined value, for example, more than 1% of the brightness (light quantity), that is, a signal is sent to prompt the user to check the display of the projector 1 。. The same, when the projector 1 is upside down, the hole is opened.
210開啟，光感應器230感應1〇0%的亮度（光量），但如 投影機100的擺設傾斜造成開孔21〇未完全開啟而亮度不 足時，光感應器230感測到未滿一預定值，例如未滿9〇 %的亮度（光量）時，即傳送一訊號提示使用者檢查投影 機100的擺設。 〜 擋片220於光控裝置2〇〇内的移動方式，可舉例如沿 著軌道的滑移方式，或者—轉動的方式等。 2。二？/Γ’係、本發明之另一實施例之光控裝置 L Μ對應可平放、倒掛、左側放置、右侧放置之r ::機種，亦即’如平放為〇。，旋轉90。、180。、27〇。 的角度:可投射出正立影像的投影。 =中包含-開孔211，，221，以及二光感=置 光感應器^ 置加殼體上，使光開孔211位於光控裝 孔2"上，擋片221Γ 裝置2〇1。擋片221位於開 心係與投影機轉動的軸心::的檔片221轉動的軸 211的一部分以遮蔽 丁重力的作用，覆蓋開孔 ' 4，而使光線藉由未覆蓋之開孔 1299428 211的另一部分進入光控裝置201，亦即擋片221藉由重 力方式於開孔2 1 1上轉動移動，以改變遮蔽開孔2 11的部 分。光感應器A231與光感應器B 232係並列的位於光控 裝置201内，且位於進入光控裝置201的光線照射到的位 ， 置，光感應器A231與光感應器B 232可使用可見光的光 、感應器，亦可使用不可見光的光感應器，光感應器A231 與光感應器B232的受光部受到覆蓋之面積與受光之光量 藝 成反比。而第三圖之較佳實施例所示之光控裝置2 〇 1係以 一圓孔作為開孔211，以沿著開孔211邊緣轉動之扇形作 為檔片221，而光感應器A 231與光感應器B 232係並列 的位於開孔2 11内。 第3圖中之光控裝置201設有開孔之一面的左上角位 置上附有一圓形標記，此一標記的目的係為了便於明辨光 控裝置201的旋轉角度，如第3A圖至第3D圖所示。 如第3A圖中之投影機為平放（〇。）的狀態，檔片221 | 位於開孔211下方，而光感應器A 231與光感應器B 232 係並列於開孔2 11上方的位置，此時，光感應器a 23 1與 光感應器B 232二者皆受到光的照射，藉此傳送一訊號至 投影機，使投影機投射出平放狀態時的正立影像。 將第3 A圖之平放狀態的投影機順時鐘方向旋轉9(Γ 成為如第3Β圖所示之以右侧面擺放的狀態，檔片22 1位 於開孔211下方，而光感應器A 231與光感應器Β 232係 並列於開孔2 11右側的位置，此時，光感應器a 2 3 1位於 上方而光感應器B 232位於下方，光感應器A 231受到光 10 1299428 $照射而光感應器B 232受到檔片221的遮蔽而不受光， 藉此傳送一訊號至投影機，使投影機投射出以右侧面擺放 狀態時的正立影像。 將第3B圖之平放狀態的投影機順時鐘方向旋轉9(Γ 成為相對於平放狀態旋轉180。如第3C圖所示之倒掛的狀 恶’檔片22 1位於開孔2 11下方，而光感應器a 23 1與光 感應器B 232亦並列於開孔211下方的位置，此時，光感 應器A 23 1與光感應器B 232二者皆不受到光的照射，藉 此傳送一訊號至投影機，使投影機投射出倒掛狀態時的正 立影像。 將第3 C圖之平放狀態的投影機順時鐘方向旋轉9 〇。 成為相對於平放狀態旋轉270。如第3D圖所示之以左側面 擺放的狀態，稽片2 2 1位於開孔2 11下方，而光感應器a 23 1與光感應器B 232係並列於開孔2 11左侧的位置，此 時，光感應器A 23 1位於下方而光感應器B 232位於上 方’光感應器B 232受到光的照射而光感應器A 23 1受到 檔片221的遮蔽而不受光，藉此傳送一訊號至投影機，使 投影機投射出以左側面擺放狀態時的正立影像。 由上述說明可知藉由光感應器A 23 1與光感應器B 232受光與不受光的組合，判斷投影機的旋轉角度，投射 出適於當時的擺放狀態之正立影像。 光控裝置20 1亦可判斷投影機的擺設狀態是否傾 斜，以第3A圖之擺設狀態來說明，第3A圖中之光感應 器A 23 1與光感應器B 232二者皆受到光的照射，二者皆 1299428 感應100%的亮度（光量），如此一擺設狀態下投影機的 右側些许抬起’則如第4圖所示，雖然光感應器b 232依 然感應100%的亮度（光量），但光感應器A 231 —部分 受到槽片221的遮蔽，而感應少於100%的亮度（光量）， ， 如光感應器A 23 1感應的亮度（光量）少於一預定值，例 如90% ,即傳送一訊號提示使用者檢查投影機的擺設。 較佳實施例所示之光控裝置2〇 1係以一圓孔作為開 _ 孔2 11 ’以沿著開孔2丨丨邊緣轉動之扇形作為檔片22 j， 而光感應器A 231與光感應器b 232於投影機為平放（〇。） 的狀態下並列的位於開孔211上方内。但並未限制開孔 211 '檐片221的形狀及光感應器a 231與光感應器B 232 的位置。只要能藉由檔片22 1遮蔽部分的開孔211，以光 感應器A 23 1與光感應器b 232受光與不受光的組合，改 變投影機投射影像的旋轉角度，並且判斷投影機的擺設是 否傾斜即可。諸如此類的應用實施也應理解為包含於本發 • 明的申請專利範圍内。 由上述本發明較佳實施例可知，應用本發明具有下列 優點： 1. 自動地判斷投影機的擺設狀態而投射出正立的影 像。 2. 於開機時檢查投影機的擺設狀態是否傾斜。 雖然本發明已以一較佳實施例揭露如上，然其並非用 以限定本發明，任何熟習此技藝者，在不脫離本發明之精 神和範圍内，當可作各種之更動與潤飾，因此本發明之保 12 1299428 護範圍當視後附之巾請專利範圍所界定者為準。 【圖式簡單說明】 為讓本發明之上述和其他的、 φ . m ,, 、目的特徵、優點與實施例 肊更明顯易懂，所附圖式之詳細說明如下： 第1圖係投影機平放時光控裝置之動作示意圖； 第2圖係投影機倒掛時光控裝置之動作示意圖； 第3圖係本發明之另一實施例之光控裝置之立體示 意圖；以及 第3A圖至第3D圖係第3圖之光控裝置的應用實施 例之示意圖。When the 210 is turned on, the light sensor 230 senses the brightness (light quantity) of 1〇0%, but if the tilt of the projector 100 is caused by the opening 21〇 being not fully opened and the brightness is insufficient, the light sensor 230 senses that the reservation is not full. A value, for example, when the brightness (light quantity) is less than 9〇%, a message is transmitted to prompt the user to check the display of the projector 100. The movement mode of the shutter 220 in the light control device 2 is, for example, a sliding manner along the rail or a method of rotating. 2. two? The light control device L Μ according to another embodiment of the present invention corresponds to a type of machine that can be laid flat, upside down, placed on the left side, and placed on the right side, that is, 'as flat as 〇. , rotate 90. 180. 27〇. Angle: Projects that project an erect image. = Included in the opening 211, 221, and two light sense = light sensor ^ is added to the housing, so that the light opening 211 is located on the light control hole 2 " the shutter 221 装置 device 2 〇 1. The blocking piece 221 is located at the axis of the rotation of the camera and the rotating shaft of the projector: a part of the rotating shaft 211 of the flap 221 is used to shield the gravity of the dimple, covering the opening '4, and the light is passed through the uncovered opening 1299428 211 The other part enters the light control device 201, that is, the shutter 221 is rotationally moved on the opening 21 1 to change the portion of the shielding opening 21. The light sensor A231 and the light sensor B 232 are juxtaposed in the light control device 201, and are located at the position where the light entering the light control device 201 is irradiated, and the light sensor A231 and the light sensor B 232 can use visible light. The light, the sensor, or the invisible light sensor may be used, and the area covered by the light receiving portions of the light sensor A231 and the light sensor B232 is inversely proportional to the amount of light received by the light. The light control device 2 〇1 shown in the preferred embodiment of the third embodiment has a circular hole as the opening 211, and a fan shape rotating along the edge of the opening 211 as the flap 221, and the light sensor A 231 and the light The inductor B 232 is juxtaposed within the opening 2 11 . The light control device 201 in FIG. 3 is provided with a circular mark on the upper left corner of one of the openings, and the purpose of this mark is to facilitate the discrimination of the rotation angle of the light control device 201, as shown in FIG. 3A to FIG. 3D illustration. If the projector in FIG. 3A is in a flat state, the shutter 221 | is located below the opening 211, and the light sensor A 231 and the light sensor B 232 are juxtaposed above the opening 2 11 . At this time, both the light sensor a 23 1 and the light sensor B 232 are irradiated with light, thereby transmitting a signal to the projector, so that the projector projects an erect image when it is in a flat state. The projector in the flat state of FIG. 3A is rotated clockwise by 9 (Γ is placed in the state of being placed on the right side as shown in FIG. 3, and the flap 22 1 is located below the opening 211, and the light sensor is A 231 and the light sensor Β 232 are juxtaposed on the right side of the opening 2 11 , at this time, the light sensor a 2 3 1 is located above and the light sensor B 232 is located below, and the light sensor A 231 receives light 10 1299428 $ After illumination, the light sensor B 232 is shielded from the light by the shutter 221, thereby transmitting a signal to the projector, so that the projector projects the erect image when placed on the right side. The projector in the released state rotates 9 in the clockwise direction (Γ is rotated 180 with respect to the flat state. The upside down flap 22 1 as shown in Fig. 3C is located below the opening 2 11 , and the light sensor a 23 1 and the light sensor B 232 are also juxtaposed at a position below the opening 211. At this time, neither the light sensor A 23 1 nor the light sensor B 232 is irradiated with light, thereby transmitting a signal to the projector. An erect image that causes the projector to project in an upside down state. The projector in the flat state of Figure 3C is placed The clock is rotated by 9 〇. It is rotated 270 with respect to the flat state. As shown in Fig. 3D, the left side is placed, the document 2 2 1 is located below the opening 2 11 , and the light sensor a 23 1 is The light sensor B 232 is juxtaposed to the left side of the opening 2 11 . At this time, the light sensor A 23 1 is located below and the light sensor B 232 is located above. The light sensor B 232 is irradiated with light and the light sensor is A 23 1 is shielded from the shutter 221 from light, thereby transmitting a signal to the projector, causing the projector to project an erect image when placed on the left side. It is known from the above description that the light sensor A 23 1 and the light sensor B 232 is combined with light and light, determines the rotation angle of the projector, and projects an erect image suitable for the current state of placement. The light control device 20 1 can also determine whether the projector is tilted. According to the state of the arrangement of FIG. 3A, both the light sensor A 23 1 and the light sensor B 232 in FIG. 3A are exposed to light, and both 1299428 sense 100% brightness (light quantity), In the state of a display, the right side of the projector is slightly raised. As shown in Fig. 4, although the light sensor b 232 still senses 100% brightness (light quantity), the light sensor A 231 is partially shielded by the groove 221, and the brightness is less than 100% (light quantity), such as The brightness (light quantity) sensed by the light sensor A 23 1 is less than a predetermined value, for example, 90%, that is, a signal is transmitted to prompt the user to check the display of the projector. The light control device 2〇1 shown in the preferred embodiment is A circular hole as the opening_hole 2 11 ' has a fan shape rotating along the edge of the opening 2 as the flap 22 j, and the light sensor A 231 and the light sensor b 232 are laid flat on the projector. In the state of the state, it is juxtaposed in the upper side of the opening 211. However, the shape of the opening 211' cymbal 221 and the position of the light sensor a 231 and the light sensor B 232 are not limited. As long as the opening 211 of the portion of the shutter 22 is shielded, the light sensor A 23 1 and the light sensor b 232 are combined with light and light, and the rotation angle of the projected image of the projector is changed, and the display of the projector is judged. Whether it is tilted or not. Application implementations such as these are also to be understood as being included in the scope of the patent application of the present application. As is apparent from the above-described preferred embodiments of the present invention, the application of the present invention has the following advantages: 1. Automatically judges the state of the projector and projects an erect image. 2. Check if the projector's display status is tilted at power on. Although the present invention has been described above in terms of a preferred embodiment, it is not intended to limit the invention, and it is obvious to those skilled in the art that various changes and modifications can be made without departing from the spirit and scope of the invention. INSURANCE OF THE INVENTION 12 1299428 The scope of protection shall be subject to the definition of the scope of the patent. BRIEF DESCRIPTION OF THE DRAWINGS In order to make the above and other aspects, features, advantages and embodiments of the present invention more obvious, the detailed description of the drawings is as follows: Figure 1 is a projector FIG. 2 is a schematic diagram of the operation of the light control device when the projector is upside down; FIG. 3 is a perspective view of the light control device according to another embodiment of the present invention; and FIG. 3A to FIG. 3D is a schematic diagram of an application embodiment of the light control device of FIG.
第4圖係第3A圖之擺設狀態的投影機於傾斜狀態的 示意圖。Fig. 4 is a schematic view showing the projector in the state of the arrangement of Fig. 3A in a tilted state.
【主要元件符號說明】 1〇〇 :投影機 200 ： 光控裝置 201 ： 光控裝置 210 ： 開孔 211 : 開孔 220 ： 擋片 221 ： 檔片 230 ： 光感應器 231 ： 光感應器A 232 ： 光感應器B 13[Main component symbol description] 1〇〇: Projector 200: Light control device 201: Light control device 210: Opening 211: Opening 220: Blank 221: Stop 230: Light sensor 231: Light sensor A 232 : Light sensor B 13