1250313 九、發明說明： 【發明所屬之技術領域】 本發明係關於一種稜鏡板及其製造方法，特別係指一 種具有黑帶層之稜鏡板及其製造方法。 【先前技術】 近年來，單光源投影之液晶投影機或是數位光源處理 裝置(DLP)在明亮度與密實性皆較傳統的CRT投影機佳。 ® 圖1所示係為液晶投影機或是數位光源處理裝置所使 用之螢幕’螢幕1係包含一菲淫爾透鏡(Fresnel Lens)ll以 及凸透鏡層12。如圖1所示，光源所發射之光線係藉由菲 涅爾透鏡11而成為平行光，此平行光穿過凸透鏡層12入 光側之複數凸透鏡121而聚光，再由凸透鏡層12出光侧 以一角度Θ射出，此範圍即為觀看者可看到影像的範圍。 再請參照圖1，凸透鏡層12之出光側設置有遮光層13， 鲁其係用以防止光的反射，進而提升影像的對比度。 目前，凸透鏡層12係朝向間距(pitch)微小化的趨勢發 展，由於凸透鏡121的微小化，焦距亦隨之縮短，且凸透 鏡層12的厚度亦須減薄。然而，目前所使用的擠壓成形 製程將無法做出高精度間距微小化的凸透鏡層12。另外， 由於凸透鏡121與遮光層13之間的相對位置必須精確對 準，是以當間距微小化時，生產良率勢必會隨之降低，而 生產製造成本會隨之提高。 承上所述，本發明亟思一種可以解決此項課題之「稜 1250313 鏡板及其製造方法」，幾經研究實驗終至完成此項秦惠世 人之發明。 【發明内容】 本發明之目的係提供一種間距微細、光利用率高、精 密度高、對比高、製程簡單、製造成本低以及良率佳的稜 鏡板及其製造方法。 春 為達上述目的，依據本發明之一種稜鏡板，包含一稜 鏡層、一反射膜以及一黑帶層，其中，棱鏡層係具有複數 個單元稜鏡，每一單元稜鏡具有一反射部、一入光部與一 出光部；反射膜係設置於每一單元稜鏡之反射部，俾使從 入光部射入之部分光線反射至出光部；黑帶層係具有至少 一透光部與至少一遮光部，黑帶層係設置於稜鏡層上，透 光部係與出光部相貼合。 為達上述目的，依據本發明之一種稜鏡板製造方法， 鲁包含下列步驟：形成一稜鏡層；於該稜鏡層之一出光部形 成一遮蔽層；於該稜鏡層之一反射部形成一反射層；移去 該遮蔽層；設置一感光膜於該棱鏡層，俾使該感光膜與該 出光部相貼合；進行曝光；以及於該感光膜未曝光的部分 灑上碳粉。 承上所述，於本發明之稜鏡板及其製造方法中，每一 單元稜鏡中係設置有反射膜，俾使從入光部射入之部分光 線反射至出光部，同時於稜鏡層之出光側設置有黑帶層， 此黑帶層係利用感光膜與部分灑上碳粉所形成。與習知技 1250313 術相比’本發明利用反射層反射光線的特性來增加光的利 用率，同時亦可達到間距微小化與高精密度的要求，另 .外，由於黑帶層可利用簡單的製程製作，是以亦可降低生 產成本以及提高製程良率。且，由於黑帶層設置於棱鏡層 之出光側，亦可提高對比度。 【實施方式】 以下將參照相關圖式，說明依據本發明較佳實施例之 ®棱鏡板及其製造方法。 如圖2所示’依據本發明較佳實施例之棱鏡板3，包 含一稜鏡層31、一反射膜32以及一黑帶層33。 其中，稜鏡層31係具有複數個單元稜鏡311，每一單 元棱鏡311具有一反射部3111、一入光部3112與一出光 部3113。反射膜32係設置於每一單元稜鏡311之反射部 3111，俾使從入光部3112射入之部分光線反射至出光部 鲁3113’從入光部3112射入之另一部分光線直接射至出光部 3113。黑帶層33係具有至少一透光部331與至少一遮光 部332，黑帶層33係設置於稜鏡層31上，透光部331係 與出光部3113相貼合。 如圖2所示，於本實施例中，單元稜鏡311的剖面可 為一梯形，且單元稜鏡311之斜侧面係為反射部3111，單 元稜鏡311之頂面係為出光部3113。 於本實施例中，單元稜鏡311可為一維設計稜鏡或為 二維設計稜鏡。當單元稜鏡311係為一維設計稜鏡時，可 1250313 以控制觀看者左右水平的視角。另外，當單元稜鏡311係 為二維設計稜鏡時，可以同時控制觀看者左右水平與上下 垂直的視角。 另外，本實施例之反射膜32的材質可為金屬，舉例 而言，反射膜32的材質可為鋁（A1)。 再者，本貫施例之黑帶層33的材質可包含光固膠， 舉例而言’黑帶層33可包含紫外光(uv)膠。另外，黑帶 層33的遮光部332可為光固膠麗上碳粉所形纟，且透光 :331係與遮光部332相鄰交錯而設。於本實施例中，黑 f層33係用於阻擋外在環境光的反射，以增加整體的對 比度。 為使說明更加清楚，以下將舉例說明稜鏡板3利用於 液晶投影機或是數位光源處理裝置所使用之螢幕的情況。 如圖3所示，螢幕4係由稜鏡裝置5與菲涅爾透鏡6 所組成’且稜鏡裝置5與菲涅爾透鏡6係相互鄰設。其中， _稜鏡裝置5係由一基板51、棱鏡板3以及一前板52所組 成，稜鏡板3係設置於基板51上，而前板52係利用黏著 層53與稜鏡板3相互黏合。於此，基板51係為透明基板， 且材質可選自PET、PVC或是其他高分子材料。而黏著層 53係可摻雜擴散粒子⑷抒user p〇w(jer)，以增加螢幕視角。 另外’發幕4的功能係與前述習知技術之螢幕1相近，在 此不再贅述。 再者’如圖4所示，依據本發明另一較佳實施例之稜 鏡板製造方法，包含下列步驟：形成一稜鏡層71(S01); 8 1250313 於稜鏡層71之一出光部711形成一遮蔽層72(S02);於稜 鏡層71之一反射部712形成一反射層73(s〇3);移去遮蔽 層72(S04)，設置一感光膜74於稜鏡層71，俾使感光膜 74與出光部711相貼合(S〇5);進行曝光();以及於感 光膜74未曝光的部分742灑上碳粉(s〇7)。 再請參照圖5A，於步驟S01中，形成稜鏡層7卜 再請參照圖5B，於步驟S02中，於棱鏡層71之出光 部711形成遮蔽層72。於此，遮蔽層72係可利用塗佈油 #墨方式所形成。 再請參照圖5C，於步驟S03中，於稜鏡層71之反射 部712形成反射層73。於此，稜鏡層71之反射部712係 利用蒸鍍方法來形成反射層73。 再請參照圖5D，於步驟s〇4中，移去遮蔽層72。於此， 利用水洗去遮蔽層72。 再請參照圖5E，於步驟s〇5中，設置感光膜74於稜鏡 籲層71 ’俾使感光膜74與出光部711相貼合。於此，感光 膜74可為光固膠，舉例而言，感光膜74可為紫外光膠。 再請參照圖5F，於步驟s〇6中，進行曝光。於此，係 於稜鏡層71之入光側進行曝光。其中，曝光的部分74ι 因為受到光照射而硬化，而未曝光的部分742具有黏著性。 再請參照圖5G，於步驟s〇7中，於感光臈74未曝光 的部分742灑上碳粉。是以，灑上有碳粉的感光膜％係 為一遮光部，沒有灑上碳粉的感光膜係為一透光部。 經由上述步驟，形成一稜鏡板7。 Ϊ250313 承上所述，於本發明之棱鏡板及其製造方法中，每一 單凡稜鏡中係設置有反射膜，俾使從入光部射入之部分光 線反射至出光部，同時於稜鏡層之出光側設置有黑帶層， 此黑帶層係利用感光膜與部分灑上碳粉所形成。與習知技 術相比，本發明利用反射層反射光線的特性來增加光的利 用率，同時亦可達到間距微小化與高精密度的要求，另 外，由於黑帶層可利用簡單的製程製作，是以亦可降低生 鲁產成本以及提高製程良率。且，由於黑帶層設置於棱鏡層 之出光側，亦可提高對比度。 以上所述僅為舉例性，而非為限制性者。任何未脫離 本發明之精神與範疇，而對其進行之等效修改或變更，均 應包含於後附之申請專利範圍中。 【圖式簡單說明】 圖1係為習知之螢幕的一示意圖； ♦圖2係為本發明較佳實施例之稜鏡板的-示意圖； 圖3係為利用本發明較佳實施例稜鏡板之螢幕的一系意 圖； 、圖4係為本發明另—較佳實施例之棱鏡板製造方法的〆 流程圖；以及 圖5Α 5G係為本發明另一較佳實施例之稜鏡板製造方 法的一組分解示意圖。 元件符號說明： 1250313BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fascia board and a method of manufacturing the same, and more particularly to a slab having a black belt layer and a method of manufacturing the same. [Prior Art] In recent years, a single-light source liquid crystal projector or a digital light source processing device (DLP) is superior in brightness and compactness to a conventional CRT projector. ® Figure 1 shows a screen used by a liquid crystal projector or a digital light source processing device. The screen 1 includes a Fresnel Lens and a convex lens layer 12. As shown in FIG. 1, the light emitted by the light source is parallel light by the Fresnel lens 11, and the parallel light passes through the complex convex lens 121 on the light incident side of the convex lens layer 12 to be condensed, and then the light exit side of the convex lens layer 12 Shot at an angle that is the range of images that the viewer can see. Referring to FIG. 1 again, a light shielding layer 13 is disposed on the light emitting side of the convex lens layer 12, which is used to prevent reflection of light, thereby improving the contrast of the image. At present, the convex lens layer 12 tends to be miniaturized toward a pitch. Due to the miniaturization of the convex lens 121, the focal length is also shortened, and the thickness of the convex lens layer 12 is also required to be thinned. However, the extrusion molding process currently used cannot produce the convex lens layer 12 with high precision pitch miniaturization. In addition, since the relative position between the convex lens 121 and the light shielding layer 13 must be accurately aligned, when the pitch is miniaturized, the production yield is bound to decrease, and the manufacturing cost is increased. According to the above description, the present invention considers a "Ring 1250313 mirror plate and a manufacturing method thereof" which can solve the problem, and has completed research and experiments to complete the invention of the Qin Hui people. SUMMARY OF THE INVENTION An object of the present invention is to provide a prism plate having a fine pitch, high light utilization efficiency, high precision, high contrast, simple process, low manufacturing cost, and good yield, and a method of manufacturing the same. In order to achieve the above object, a raft according to the present invention comprises a enamel layer, a reflection film and a black belt layer, wherein the prism layer has a plurality of unit 稜鏡, each unit 稜鏡 has a reflection portion a light incident portion and a light exit portion; a reflective film is disposed on the reflective portion of each unit, and reflects a portion of the light incident from the light incident portion to the light exit portion; the black strip layer has at least one light transmitting portion And at least one light shielding portion, the black belt layer is disposed on the enamel layer, and the light transmitting portion is bonded to the light exit portion. In order to achieve the above object, according to a method for manufacturing a fascia of the present invention, Lu comprises the steps of: forming a ruthenium layer; forming a shielding layer on one of the enamel layers; forming a reflection layer on the enamel layer a reflective layer; removing the shielding layer; disposing a photosensitive film on the prism layer, bonding the photosensitive film to the light-emitting portion; performing exposure; and spraying the toner on the unexposed portion of the photosensitive film. As described above, in the fascia board of the present invention and the method of manufacturing the same, each unit 稜鏡 is provided with a reflective film for reflecting a part of the light incident from the light incident portion to the light exiting portion, and simultaneously forming the enamel layer A black belt layer is formed on the light exiting side, and the black belt layer is formed by using a photosensitive film and partially sprinkling carbon powder. Compared with the conventional technique 1250313, the present invention utilizes the characteristics of the reflective layer to reflect light to increase the utilization of light, and at the same time, can achieve the requirements of miniaturization and high precision of the pitch, and the black belt layer can be utilized simply. Process manufacturing can also reduce production costs and improve process yield. Further, since the black strip layer is provided on the light outgoing side of the prism layer, the contrast can be improved. [Embodiment] A prism sheet and a method of manufacturing the same according to a preferred embodiment of the present invention will be described below with reference to the related drawings. As shown in Fig. 2, the prism sheet 3 according to the preferred embodiment of the present invention comprises a tantalum layer 31, a reflective film 32 and a black strip layer 33. The enamel layer 31 has a plurality of cells 311, and each of the cell prisms 311 has a reflecting portion 3111, a light incident portion 3112, and a light exit portion 3113. The reflective film 32 is disposed on the reflecting portion 3111 of each unit 稜鏡 311, so that part of the light incident from the light incident portion 3112 is reflected to the other portion of the light emitted from the light incident portion 3112. Light exiting portion 3113. The black strip layer 33 has at least one light transmitting portion 331 and at least one light blocking portion 332. The black strip layer 33 is provided on the enamel layer 31, and the light transmitting portion 331 is bonded to the light exit portion 3113. As shown in FIG. 2, in the embodiment, the cross section of the unit 稜鏡 311 may be a trapezoid, and the oblique side surface of the unit 稜鏡 311 is a reflection portion 3111, and the top surface of the unit 稜鏡 311 is a light exit portion 3113. In this embodiment, the unit 稜鏡 311 can be a one-dimensional design or a two-dimensional design. When the unit 稜鏡 311 is a one-dimensional design, 1250313 can be used to control the viewing angle of the viewer to the left and right. In addition, when the unit 稜鏡 311 is a two-dimensional design, it is possible to simultaneously control the viewing angle of the viewer to the left and right horizontal and vertical. In addition, the material of the reflective film 32 of the present embodiment may be a metal. For example, the material of the reflective film 32 may be aluminum (A1). Furthermore, the material of the black strip layer 33 of the present embodiment may comprise a photo-curable adhesive. For example, the black strip layer 33 may comprise an ultraviolet (uv) glue. Further, the light-shielding portion 332 of the black strip layer 33 may be in the shape of a toner on the photo-curable rubber, and the light-transmitting: 331-series is disposed adjacent to the light-shielding portion 332. In this embodiment, the black f layer 33 is used to block the reflection of external ambient light to increase the overall contrast. In order to clarify the description, the case where the seesaw 3 is used for a screen used in a liquid crystal projector or a digital light source processing apparatus will be exemplified below. As shown in Fig. 3, the screen 4 is composed of a crucible device 5 and a Fresnel lens 6 and the crucible device 5 and the Fresnel lens 6 are adjacent to each other. The 稜鏡 device 5 is composed of a substrate 51, a prism plate 3, and a front plate 52. The yoke 3 is disposed on the substrate 51, and the front plate 52 is bonded to the yoke 3 by the adhesive layer 53. Here, the substrate 51 is a transparent substrate, and the material may be selected from PET, PVC or other polymer materials. The adhesive layer 53 can be doped with diffusion particles (4) 抒user p〇w (jer) to increase the viewing angle of the screen. Further, the function of the 'curtain 4' is similar to that of the screen 1 of the prior art described above, and will not be described again. In addition, as shown in FIG. 4, a method for manufacturing a fascia according to another preferred embodiment of the present invention includes the following steps: forming a enamel layer 71 (S01); 8 1250313 venting portion 711 at one of the enamel layers 71 Forming a shielding layer 72 (S02); forming a reflective layer 73 (s〇3) on the reflective portion 712 of the germanium layer 71; removing the shielding layer 72 (S04), and providing a photosensitive film 74 on the germanium layer 71, The photosensitive film 74 is bonded to the light exiting portion 711 (S〇5); exposure () is performed; and the toner (s〇7) is sprinkled on the unexposed portion 742 of the photosensitive film 74. Referring to Fig. 5A, in step S01, a germanium layer 7 is formed. Referring to Fig. 5B, in step S02, a light shielding layer 72 is formed in the light exit portion 711 of the prism layer 71. Here, the shielding layer 72 can be formed by a coating oil #ink method. Referring again to Fig. 5C, in step S03, a reflective layer 73 is formed on the reflective portion 712 of the germanium layer 71. Here, the reflection portion 712 of the ruthenium layer 71 forms the reflection layer 73 by a vapor deposition method. Referring again to FIG. 5D, in step s4, the masking layer 72 is removed. Here, the shielding layer 72 is washed away with water. Referring to Fig. 5E, in step s5, the photosensitive film 74 is disposed on the buffer layer 71' to bond the photosensitive film 74 to the light exit portion 711. Here, the photosensitive film 74 may be a photo-curable adhesive. For example, the photosensitive film 74 may be an ultraviolet adhesive. Referring again to FIG. 5F, in step s6, exposure is performed. Here, exposure is performed on the light incident side of the enamel layer 71. Among them, the exposed portion 74 i is hardened by irradiation with light, and the unexposed portion 742 has adhesiveness. Referring again to Fig. 5G, in step s7, toner is sprinkled on the unexposed portion 742 of the photosensitive web 74. Therefore, the % of the photosensitive film sprinkled with the toner is a light-shielding portion, and the photosensitive film not sprinkled with the toner is a light-transmitting portion. Through the above steps, a seesaw 7 is formed. Ϊ250313 As described above, in the prism sheet of the present invention and the method of manufacturing the same, each of the single cymbals is provided with a reflective film for reflecting a part of the light incident from the light incident portion to the light exiting portion, and at the same time A black belt layer is disposed on the light exiting side of the mirror layer, and the black belt layer is formed by using a photosensitive film and partially sprinkling carbon powder. Compared with the prior art, the present invention utilizes the characteristics of the reflective layer to reflect light to increase the utilization of light, and also achieves the requirement of miniaturization and high precision of the pitch. In addition, since the black strip layer can be fabricated by a simple process, Therefore, it can also reduce the cost of production and increase the yield of the process. Further, since the black strip layer is provided on the light outgoing side of the prism layer, the contrast can be improved. The above is intended to be illustrative only and not limiting. Any equivalent modifications or alterations to the spirit and scope of the present invention are intended to be included in the scope of the appended claims. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic view of a conventional screen; FIG. 2 is a schematic view of a seesaw according to a preferred embodiment of the present invention; FIG. 3 is a screen using a seesaw according to a preferred embodiment of the present invention. Figure 4 is a flow chart of a method for fabricating a prism sheet according to another preferred embodiment of the present invention; and Figures 5A and 5G are a set of a method for manufacturing a seesaw according to another preferred embodiment of the present invention. Decomposition diagram. Symbol Description: 1250313
1 螢幕 11 菲淫爾透鏡 12 凸透鏡層 121 凸透鏡 13 遮光層 3 稜鏡板 31 稜鏡層 32 反射膜 33 黑帶層 311 單元稜鏡 3111 反射部 3112 入光部 3113 出光部 331 透光部 332 遮光部 4 螢幕 5 稜鏡裝置 51 基板 52 前板 53 黏著層 6 菲涅爾透鏡 7 稜鏡板 71 棱鏡層 711 出光部 1250313 72 712 73 74 741 遮蔽層 反射部 反射層 感光膜 曝光的部分 未曝光的部分 7421 Screen 11 Philippine lens 12 Convex lens layer 121 Convex lens 13 Light-shielding layer 3 稜鏡 plate 31 稜鏡 layer 32 Reflection film 33 Black ray layer 311 Unit 稜鏡 3111 Reflection part 3112 Light-in part 3113 Light-emitting part 331 Light-transmitting part 332 Light-shielding part 4 Screen 5 稜鏡 device 51 Substrate 52 Front plate 53 Adhesive layer 6 Fresnel lens 7 稜鏡 plate 71 Prism layer 711 Light exit portion 1250313 72 712 73 74 741 Shield layer reflection portion Reflective layer Part of the unexposed portion exposed by the photosensitive film