201003287 九、發明說明： 【發明所屬之技術領域】 本發明涉及一種色輪。 【先前技術】 . 投影系統係一類常見之光電顯示裝置，被廣泛應用於 生活娛樂、學術講演、商務展示等場合。按其顯示原理， 投影系統可分為液晶顯示（Liquid Crystal Display，LCD)投 影系統、數位光處理(Digital Light Processing, DLP)投影系 統及矽晶（Liquid Crystal on Silicon，LCoS)投影系統等類 別。其中’ DLP投影系統因具有亮度高、色彩逼真、回應 速率高、裝置輕薄短小等優點，而深受消費者喜歡，佔據 ' 當前投影系統產品之主要市場。 DLP投影系統採用數位微鏡晶片（Digital Micro -mirror Device，DMD)對光源進行調製，再經投影光學系統成像於 螢屏。其中，單片或雙片DMD投影系統通常採用色輪(Color Wheel)對光源進行色彩分離，為調製光添加色彩成分，實 、 現彩色顯示。 圖1為傳統之投影機中用於為投影機提供彩色光之光 源组件200之結構示意圖以及光傳播之光路圖。該光源組 件200包括一個光源20、一個紫外遽光片22、一個透鏡 23以及一個色輪21。所述色輪21包括一個馬達201、一 個濾光片202以及一個設置於濾光片202前端之擋光片 203 ’濾光片202通過接著劑204固定於所述馬達201上。 圖2為該色輪21之濾光片202之結構示意圖。該濾光片 7 201003287 202 —般異有一有效區205及一非有效區206。有效區205 用於形成圖像之有效光線通過’而非有效區206 —般沒有 用於形成圖像之有效光線通過，但是在有效光線通過所述 有效區205之同時’仍會有部分雜散光照射到非有效區 206。雖然有擔光片203設置在濾光片202前端，但馨於組 裝及色輪製作工藝之要求’其不能完全覆蓋所述非有效區 200以遮擋該雜散光。因此，該雜散光，特別是波長較短 之紫外光，會直接照射到用於連接滤光片202與馬達2〇1 之接著劑204上’而一般接著劑204無法長時間受該雜散 光之照射，特別係高亮度之投影機，光之能量強，其長時 間昭、^會使該接著劑204變質’嚴重時會使接著劑204失 效而使Μ片202飛離色輪21。 【發明内容】 有黎於此，有必要提供一種可滅少雜散光照射到接著 劑之色輪。 一種色輪，其包括一具有一接著部之馬達、一接著於 所述接著部之濾光片、一用於接著所述馬達與濾光片之接 著，以及/設於所述滤光片與所述馬達相背—侧之擔光 片〔所述慮光片包括一個有效區以及一非有效區。該有效 區用於形成圖像之有效光線穿過。所述非有效區沒有用於 形成圖像之有效光線穿過。所述非有效區還包括一附著於 其上立位於擋光片與濾光片之間之光隔離層’該光隔離層 用於隔離到達非有效區之光線。 與現有技術相比，上述之色輪利用附著在濾光片上之 8 201003287 光隔離層’將騎職 =，使雜散光不會穿過該 =馬達之接著劑上，保證接著劑不」== 描述=將結合附圖，舉以下較佳實施例並配合圖式詳細 凊參閱圖3,為本發明所提供之一種色輪10之結構示 意圖。，色輪職一馬達η、一遽光片12、將馬：二 與濾光片12粘著之接著劑13、一擋光片14以及一光隔離 層15。所述濾光片12與所述馬達η相連接。所述擋光片 14設於所述濾光片12與所述馬達11相背一側。所述光隔 離層15附著於所述濾光片12上。 k 所述馬達11包括由磁鐵、碎鋼片、電線繞圈等電磁组 件（圖未示）構成之轉子ill及定子（圖未示）。所述轉子ill之 一端設置有一轉盤112。當馬達11啟動時，所述電磁元件產 生旋轉磁場驅使所述轉子ill轉動。所述馬達11還包括一接 著部113，所述接著部113設於所述轉盤112上，工作時，所 述接著部113帶動與其相接著之濾光片12隨所述轉子111轉 動。本實施方式之轉子111為轉轴’所述滤光片12接著於所 述轉盤112與所述馬達11相背一面，並套設在該轉子111上。 所述濾光片12為一環形透明基片，其表面分成複數磁 區，各磁區鍍有不同之濾光膜（圖未示）。本實施方式之環 形透明基片採用玻璃，所述玻璃表面分成四個磁區，分別 9 201003287 鐘有用於遽取紅光、綠光、藍光及白光之遽光膜。當然， 濾'光片12之設置並不限於本實施方式，所述環形透明基月 可採用其他符合條件之透明基片，也可更改鑛膜之設置， .甚至可採用複數扇形子縣片相結合之方式製成所述滤光 • 片12。所述濾光片12通過接著劑13直接接著於所述接著部 113上。所述接著劑13可以為一種環氧樹脂(Ep〇xy)。所述 濾光片12還包括一個有效區121及一個非有效區122。有效 區121用於形成圖像之有效光線通過，而非有效區122—般 沒有用於形成圖像之有效光線通過。 所述擋光片14需具備以下特點：1)可阻擋直接射向所 述接著部113之光線，避免所述接著部113之接著品質惡 化’ 2)與所述濾光片12之熱膨脹係數大致相等，避免造成 熱應力損壞所述濾光片12。為此，本實施方式採用反射擋 光片作為擋光片14,其具備高擋光能力，擋光效果好。另 外，本實施方式採用與所述濾光片12相同之材料製成擋光 片14 ’如此，所述擋光片14與所述濾光片12熱膨脹係數相 同，實現兩者之熱耦合。所述擋光片14之材料也可替換成 熱膨脹係數與所述渡光片12之熱膨脹係數相近之其他材 料。所述擋光片14採用接著方式設於所述濾光片12與所述 馬達11相背一侧。當然’也可採用結構配合專方式設於所 述濾光片12與所述馬達11相背一側。 所述光隔離廣15設置於渡光片12與擔光片14之間’以 阻擋射向渡光片12之非有效區122之雜散光。該光隔離層15 可以為—紫外慮光片、金屬膜、介電膜’其都可以粘附於 201003287 濾光片12之非有效區122上。可以理解的是，該光隔離層15 也可以係一油墨層，其塗布於遽光片12之非有效區122上。 甚至該光隔離層15可以為一霧化層，其設置在攄光片12之 非有效區122上，其大小以能夠完全覆蓋該非有效區122為 准。在本實施方式中，該光隔離層15為一紫外遽光片。 上述之色輪利用附著在濾光片12上之光隔離層15, 將照射到濾光片12之非有效區122上之雜散光反射或者吸 收，使雜散光不會穿過該濾光片12而照射到用來枯接、廣光201003287 IX. Description of the invention: [Technical field to which the invention pertains] The present invention relates to a color wheel. [Prior Art] Projection system is a common type of photoelectric display device, which is widely used in life entertainment, academic lectures, business presentations and other occasions. According to its display principle, the projection system can be divided into liquid crystal display (LCD) projection system, digital light processing (DLP) projection system and Liquid Crystal on Silicon (LCoS) projection system. Among them, the DLP projection system is popular among consumers because of its high brightness, vivid color, high response rate, and light weight and shortness of the device. It is the main market for current projection system products. The DLP projection system modulates the light source using a Digital Micro-mirror device (DMD) and then images it on the screen through a projection optical system. Among them, single- or dual-chip DMD projection systems usually use a Color Wheel to color-separate the light source, add color components to the modulated light, and display in real color. 1 is a schematic structural view of a light source assembly 200 for providing colored light to a projector in a conventional projector, and an optical path diagram of light propagation. The light source assembly 200 includes a light source 20, an ultraviolet ray tube 22, a lens 23, and a color wheel 21. The color wheel 21 includes a motor 201, a filter 202, and a light blocking plate 203' disposed at the front end of the filter 202. The filter 202 is fixed to the motor 201 by an adhesive 204. FIG. 2 is a schematic structural view of the filter 202 of the color wheel 21. The filter 7 201003287 202 generally has an active area 205 and an inactive area 206. The effective area 205 is used to form the effective light of the image through the 'ineffective area 206' and there is generally no effective light for forming the image, but there is still some stray light while the effective light passes through the active area 205. Irradiation into the inactive area 206. Although the light-bearing sheet 203 is disposed at the front end of the filter 202, it is required by the assembly and color wheel manufacturing process to completely cover the inactive area 200 to block the stray light. Therefore, the stray light, especially the ultraviolet light having a short wavelength, is directly irradiated onto the adhesive 204 for connecting the filter 202 and the motor 2〇1, and generally the adhesive 204 cannot be subjected to the stray light for a long time. Irradiation, especially for high-brightness projectors, where the energy of the light is strong, which causes the adhesive 204 to deteriorate for a long time, causing the adhesive 204 to fail and causing the web 202 to fly away from the color wheel 21. SUMMARY OF THE INVENTION In view of this, it is necessary to provide a color wheel that can illuminate less stray light and illuminate the adhesive. A color wheel comprising a motor having a follow-up portion, a filter followed by the follow-up portion, a follow-up for the motor and the filter, and/or a filter disposed on the filter The motor is opposite to the side of the light-bearing sheet [the light-receiving sheet includes an effective area and an inactive area. This active area is used to form effective light for the image to pass through. The non-active area has no effective light for forming an image to pass through. The non-active area further includes an optical isolation layer attached to the optical barrier between the light blocking sheet and the filter. The optical isolation layer is used to isolate light reaching the inactive area. Compared with the prior art, the above color wheel utilizes the 8 201003287 optical isolation layer attached to the filter to 'ride the seat=, so that the stray light does not pass through the = motor adhesive, ensuring that the adhesive is not" = The description of the color wheel 10 according to the present invention will be made in conjunction with the accompanying drawings. A color wheel motor η, a strobe film 12, an adhesive 13 adhered to the filter 12, a light blocking sheet 14, and an optical isolating layer 15. The filter 12 is connected to the motor η. The light blocking sheet 14 is disposed on a side of the filter 12 opposite to the motor 11. The light isolation layer 15 is attached to the filter 12. k The motor 11 includes a rotor ill and a stator (not shown) composed of an electromagnetic component (not shown) such as a magnet, a steel chip, and a wire coil. One end of the rotor ill is provided with a turntable 112. When the motor 11 is activated, the electromagnetic component generates a rotating magnetic field to drive the rotor ill to rotate. The motor 11 further includes a connecting portion 113. The connecting portion 113 is disposed on the turntable 112. In operation, the connecting portion 113 drives the filter 12 adjacent thereto to rotate with the rotor 111. The rotor 111 of the present embodiment is a rotating shaft. The filter 12 is then disposed on the rotor 111 with the turntable 112 facing away from the motor 11. The filter 12 is an annular transparent substrate whose surface is divided into a plurality of magnetic regions, and each magnetic region is plated with a different filter film (not shown). The ring-shaped transparent substrate of the present embodiment is made of glass, and the surface of the glass is divided into four magnetic regions, and each of the 9 201003287 clocks has a light film for extracting red light, green light, blue light, and white light. Of course, the arrangement of the filter 'light sheet 12 is not limited to the embodiment. The ring-shaped transparent base can adopt other transparent substrates that meet the conditions, and the setting of the mineral film can also be changed. Even the plural fan-shaped county film phase can be used. The filter sheet 12 is formed in combination. The filter 12 is directly attached to the subsequent portion 113 by an adhesive 13. The adhesive 13 may be an epoxy resin (Ep〇xy). The filter 12 further includes an active area 121 and an inactive area 122. The active area 121 is used to form the effective light of the image, and the non-active area 122 is generally free of effective light for forming an image. The light blocking sheet 14 is required to have the following features: 1) blocking light rays directly incident on the rear portion 113, avoiding deterioration of the quality of the succeeding portion 113; 2) and a thermal expansion coefficient of the filter 12 Equal, avoiding thermal stress damage to the filter 12. Therefore, in this embodiment, a reflective light blocking sheet is used as the light blocking sheet 14, which has a high light blocking capability and a good light blocking effect. Further, in the present embodiment, the light-shielding sheet 14' is formed using the same material as the color filter 12. Thus, the light-blocking sheet 14 and the filter sheet 12 have the same thermal expansion coefficient to achieve thermal coupling therebetween. The material of the light-blocking sheet 14 can also be replaced with other materials having a coefficient of thermal expansion similar to that of the light-passing sheet 12. The light blocking sheet 14 is disposed on the side of the filter 12 opposite to the motor 11 in a follow-up manner. Of course, it is also possible to provide a structure and a special arrangement on the side of the filter 12 opposite to the motor 11. The optical isolation 15 is disposed between the light-passing sheet 12 and the light-receiving sheet 14 to block stray light that is directed toward the inactive area 122 of the light-receiving sheet 12. The optical isolation layer 15 may be an ultraviolet light-receiving sheet, a metal film, or a dielectric film' which may be adhered to the inactive area 122 of the 201003287 filter 12. It can be understood that the optical isolation layer 15 can also be an ink layer coated on the inactive area 122 of the calendering sheet 12. Even the optical isolation layer 15 can be an atomized layer disposed on the inactive area 122 of the calendering sheet 12, the size of which is sufficient to completely cover the inactive area 122. In the embodiment, the optical isolation layer 15 is an ultraviolet fluorescent sheet. The color wheel described above reflects or absorbs stray light that is incident on the inactive area 122 of the filter 12 by the optical isolation layer 15 attached to the filter 12, so that stray light does not pass through the filter 12. And the light is used to dry up, wide light
片12與馬達11的接著劑13上’從而保證接著劑I〗^ A 光線照射發熱而惡化接著品質，可長期保持良好之接著= 質。 者 綜上所述，本發明符合發明專利要件，爰依法提 利申請。惟，以上所述者僅為本發明之較佳實施方2 發明之範圍衫以上述實施方式為限，舉凡熟悉本工案= 之人士援依本發料精神所叙等效修飾或變化，= 蓋於以下申請專利範圍内。 【圖式簡單說明】 構示意圖 圖1係傳統之投影機之光源組件之色輪之妹 以及光路傳播示意圖。 σ 圖2係圖1之色輪之濾光片之結構示意圖。 圖3係本發明提供之色輪之結構示意圖。 圖4係圖3之色輪之濾光片之結構示意圖。 11 201003287 【主要元件符號說明】 色輪 10 馬達 11 轉子 111 轉盤 112 接著部 113 濾光片 12 有效區 121 非有效區 122 接著劑 13 擋光片 14 光隔離層 15 光源 20 色輪 21 馬達 201 濾光片 202 擋光片 203 接著劑 204 有效區 205 非有效區 206 紫外濾光片 22 透鏡 23 光源組件 200 12The sheet 12 is on the adhesive 13 of the motor 11 to ensure that the adhesive I is irradiated with heat to deteriorate the quality, and the quality can be maintained for a long time. In summary, the present invention complies with the requirements of the invention patent, and is applied in accordance with the law. However, the above description is only the preferred embodiment of the present invention. The scope of the invention is limited to the above embodiments, and those who are familiar with the work of the present invention are equivalent to the modifications or changes described in the spirit of the present invention. Covered in the scope of the following patent application. [Simple diagram of the diagram] Fig. 1 is a schematic diagram of the color wheel of the light source assembly of the conventional projector and the optical path propagation. σ Figure 2 is a schematic view showing the structure of the color filter of the color wheel of Fig. 1. FIG. 3 is a schematic structural view of a color wheel provided by the present invention. 4 is a schematic structural view of a color filter of the color wheel of FIG. 3. 11 201003287 [Description of main components] Color wheel 10 Motor 11 Rotor 111 Turntable 112 Next 113 Filter 12 Active area 121 Inactive area 122 Adhesive 13 Light blocking sheet 14 Optical isolation layer 15 Light source 20 Color wheel 21 Motor 201 Filter Light sheet 202 Light blocking sheet 203 Adhesive 204 Active area 205 Inactive area 206 Ultraviolet filter 22 Lens 23 Light source assembly 200 12