201109822 六、發明說明： 【發明所屬之技術領域】 本發明係有關南對比螢幕’尤其是有關高對比營幕之發幕 制法。 【先前技術】 目前投影機的螢幕形式大概可分為蓆白幕、珠光幕、光學 微結構幕。 • 蓆白幕的製作為將一白色平光塗料塗佈於基材上而成，蓆 白幕的優點為價格低廉容易製作，但蓆白幕的對比較差，因此 收受影像的視覺效果較差。 珠光幕的製作為將玻璃珠或是塑膠珠混於^•脂中塗佈於基 材上而成’其優點有具有較高的亮度及視肖，其缺點為製作成 本高且不易製作。 光學微結構幕的製作是以微小結構製作於基材上，得到良 .㈣反射及對_姻，其缺點為製作光學赌構成本高，難 以製作大面積的螢幕。 另有多種不同結構的投影幕，如台灣公開專利撕39咖 揭示的投影幕’用以接收來自一投射器面對方向的投射光，包 含丄一基材，具有複數個特性，該等特性包括—被定向至該投 射器面對方向之反射表面，該等反射表面在—第一方向中為彎 曲狀以提供-所需要的特觀視驗，且在—第二方向中為彎 曲狀以提供-所需要的垂直觀視角度；該等特性各者係為一具 201109822 有-基底及該反絲面之拱狀圓轉段，且其巾該反射表面自 该基底延伸至關_段之—梢；崎幕輯狀受的影像對 比，但其製作成本較高。 又如台灣公開專利200632518揭示的螢幕，包括一定向漫 射層，用以漫射和傳送來自特定方向的絲且線性傳送來自其 他方向的絲，-各向同性漫射層，㈣不管域的入射角度 而大約各向同性地漫射光線；及—光線反射層，設置在定向漫 射層和各向同性漫射層之間。此螢幕雖具有高對比的投影表面 與具有寬廣視肖和自缝野的投影表面，但魏作成本較高。 【發明内容】 為了使投影機的螢幕能降低成本，且具有更_視覺效果 及可製作更大面積的螢幕，而提出本發明。 本發明的主要目的，在提供-種高對比螢幕，是在-基材 的-面塗佈-内含複數光反射粒子及光吸收粒子的樹脂層構 成的光反射層’能降低成本，且方便製作更大面積的營幕。 本發明的另-目的’在提供—種高對比螢幕，使投影機的 螢幕具有更好的視覺效果。 明如^發明的其他目的、功效’請參關式及實施例，詳細說 【實施方式】 如圖1所示’本發明高對比螢幕！，包括一基材ι〇及一 光反射層20 ;基材1〇的一面1〇1結合光反射層2〇。基材 可以為塑料雕ΕΤ、PVC、〇ΡΡ、Pc等膜料）、金屬薄板^張、 201109822 布料等材質。光反射層20是在基材10的一面1〇1塗佈一内含 有複數光反射粒子21及光吸收粒子22的樹脂層23所構成 者。光反射粒子21及光吸收粒子22的形狀可以為球形或不規 則形狀；光反射粒子21及光吸收粒子22的尺寸為1(hm(奈 米）〜0. 5刪(毫米）。光反射粒子21的材質可以為金屬（鋁、銀、 錄、鉻等高反射金屬）或礦物(石英、雲母等高反射鑛物）等。 光吸收粒子21的材質為深色材料，可為目前印刷常祕，例 如：染料、碳粉、氧化銅等深色光吸收材料。 本發明高_螢幕1的製作方法，是先將光反射粒子21 及光吸收粒子22依照-定配比混合於樹月旨中；再將樹脂均句 塗佈於基材K)的-面1G1 ’紐待難絲誠後即形成結 合於基材10的-面101的樹脂層23，樹脂層23内含有複數 光反射粒子21及光吸收粒子22。樹脂可為丙稀酸樹脂、pu 樹脂、環氧樹脂等透明的樹脂；塗佈方法可以為喷塗、凹版塗 佈、網版塗佈、刮刀式塗佈等方法。 如圖1所示，本發明高對比螢幕1的原理，是利用光反射 粒子21反射投影的光’並利用光吸收粒子&吸收雜光，使投 影機投射於高mt錄1的赌得顺好㈣敝果，而使觀 眾獲得更好的視覺感受。 本發明的S對比螢幕’是在—高反射基材的—面塗佈一 内含複數光反射粒子及光吸收粒子的樹脂層構成的光反射 層；能降低絲且方錢錢大面翻螢幕，並顧光反射粒 201109822 子反射投影的光，利用光吸收粒子吸收雜光，以得到更好的對 比效果及視覺效果。 以上所S己載’僅為利用本發明技術内容之實施例，任何熟 悉本項技藝者運財㈣所為之料、變化，皆屬本發明主張 之專利範II，而不限於實施例所揭示者。 201109822 【圖式簡單說明】 圖1為本發明的高對比螢幕的示意圖。 【主要元件符號說明】 1高對比螢幕 101面 21光反射粒子 23樹脂層 10基材 20光反射層 22光吸收粒子201109822 VI. Description of the Invention: [Technical Field to Be Invented by the Invention] The present invention relates to a South contrast screen, in particular, to a high contrast screen. [Prior Art] At present, the screen form of the projector can be roughly divided into a white screen, a pearl screen, and an optical microstructure screen. • The white screen is made by applying a white flat paint to the substrate. The advantage of the white screen is that it is cheap and easy to make, but the pair of white screens is relatively poor, so the visual effect of receiving images is poor. The pearlescent curtain is made by mixing glass beads or plastic beads on the base material, and has the advantages of high brightness and visibility. The disadvantage is that the production cost is high and it is difficult to manufacture. The fabrication of optical micro-structure screens is made on a substrate with a small structure, and good results are obtained. (4) Reflection and symmetry. The disadvantage is that the optical gambling is high, making it difficult to produce a large-area screen. There are also a plurality of projection screens of different structures, such as the projection screen disclosed by Taiwan Patent Publication No. 39 Coffee, for receiving projection light from a projector facing direction, comprising a substrate having a plurality of characteristics, including: - being directed to a reflective surface of the projector facing the direction, the reflective surfaces being curved in a first direction to provide - the required special view, and curved in the - second direction to provide - the required vertical viewing angle; each of these characteristics is a 201109822 having a base and an arched rounded segment of the reversed surface, and the reflecting surface of the towel extends from the base to the closed section - The tip; the image of the Nagasaki series is contrasted, but its production cost is higher. Another example is the screen disclosed in Taiwan Patent Publication No. 200632518, which includes a diffusing layer for diffusing and transmitting filaments from a specific direction and linearly transmitting filaments from other directions, an isotropic diffusing layer, and (iv) regardless of the incidence of the domain. Anisotropically diffusing light at an angle; and a light reflecting layer disposed between the directional diffusing layer and the isotropic diffusing layer. Although this screen has a high contrast projection surface and a projection surface with a wide viewing angle and a self-sewed field, the cost of Wei Zuo is higher. SUMMARY OF THE INVENTION The present invention has been made in order to reduce the cost of a projector screen and to have a more visual effect and a screen that can produce a larger area. The main object of the present invention is to provide a high-contrast screen which is a light-reflecting layer composed of a resin layer containing a plurality of light-reflecting particles and light-absorbing particles in a substrate-surface coating, which can reduce cost and is convenient. Make a larger area of the camp. Another object of the present invention is to provide a high contrast screen that provides a better visual effect on the projector screen. Other purposes and effects of the invention are as follows. Please refer to the related examples and examples, and explain in detail. [Embodiment] As shown in Fig. 1, the high contrast screen of the present invention! And comprising a substrate ι and a light reflecting layer 20; a side of the substrate 1〇1〇1 is combined with the light reflecting layer 2〇. The substrate can be made of plastic enamel, PVC, enamel, Pc, etc., metal sheet, sheet, and 201109822 fabric. The light-reflecting layer 20 is formed by coating a resin layer 23 containing a plurality of light-reflecting particles 21 and light-absorbing particles 22 in one surface 1〇1 of the substrate 10. The shape of the light-reflecting particles 21 and the light absorbing particles 22 may be spherical or irregular; the size of the light-reflecting particles 21 and the light absorbing particles 22 is 1 (hm (nano) to 0. 5 pm (mm). The material of 21 can be metal (high-reflection metal such as aluminum, silver, chrome, chrome, etc.) or mineral (high-reflection mineral such as quartz or mica), etc. The material of the light absorbing particle 21 is a dark material, which can be used for printing. For example, a dark light absorbing material such as a dye, a carbon powder, or a copper oxide. The high-screen 1 of the present invention is prepared by first mixing the light-reflecting particles 21 and the light absorbing particles 22 in accordance with the formula ratio; Further, the resin layer is coated on the surface of the substrate K), and the resin layer 23 is bonded to the surface 101 of the substrate 10, and the resin layer 23 contains a plurality of light-reflecting particles 21 and Light absorbing particles 22. The resin may be a transparent resin such as an acrylic resin, a pu resin or an epoxy resin; and the coating method may be a method such as spray coating, gravure coating, screen coating, blade coating or the like. As shown in FIG. 1 , the principle of the high contrast screen 1 of the present invention is to reflect the projected light by using the light reflecting particles 21 and absorb the stray light by using the light absorbing particles & to make the projector project on the high mt record 1 Good (four) results, and give the audience a better visual experience. The S contrast screen of the present invention is a light reflecting layer formed by coating a resin layer containing a plurality of light reflecting particles and light absorbing particles on the surface of the high reflective substrate; the wire can be reduced and the screen can be turned over. And the light reflected by the light reflecting particles 201109822 sub-reflection, using light absorbing particles to absorb stray light, in order to get better contrast and visual effects. The above-mentioned "supplied" is only an embodiment that utilizes the technical content of the present invention, and any material and changes made by the person skilled in the art (4) are all patents claimed in the present invention, and are not limited to those disclosed in the embodiments. . 201109822 [Simplified illustration of the drawings] Fig. 1 is a schematic view of a high contrast screen of the present invention. [Main component symbol description] 1 high contrast screen 101 surface 21 light reflecting particles 23 resin layer 10 substrate 20 light reflecting layer 22 light absorbing particles