1282481 九、發明說明： 【發明所屬之技術領域】 本發明係有關於一種背投影螢幕的製造方法，尤其有關於 ，—種可提高背投織顯比及触其增錄之背投料幕製造方 法。 σ 【先前技術】 : 請參照第1A和1B ®。其顯示一般習知背投影螢幕100簡 t 《之結構示意圖。該背投影螢幕100主要係由抑圼耳透鏡 lens)l〇2及柱狀透鏡面板(Lenticular iens sheet)1〇4兩者所構 成。光學鏡頭106所輸出之光線，通過菲涅耳透鏡1〇2後可折射 呈平行光，該平行光再經由柱狀透鏡面板1〇4之柱狀部 (lenticular portions) 104a的折射與聚焦作用，最後會聚焦在 柱狀透鏡面板104之遮光層（light-shielding layer)難的表面 並成像，使人眼得以看見影像。 # 為清楚顯示構成柱狀透鏡面板104之遮光層i〇4b的黑色條 ' 紋’雜狀部104a將上述平行光於面板1〇4表面上聚焦成條狀之 • 焭紋，故除該亮紋之聚光區外，其他區域需以黑色條紋（black stripe)l〇8覆蓋而構成一遮光層，此黑色條紋1〇8的功用為防止 内部的雜散光散射至柱狀透鏡面板104之遮光層1〇4b造成影像混 雜，並且可阻止外部的散射光入射至柱狀透鏡面板104之遮光層 後反射造成炫光現象。 為了有較好的品質如提昇對比（c〇ntrast rati〇)、增益值 1282481 (Gain)、視角、均勻度或避免鬼影、莫里條紋…等等，目前所發 展之改良技術皆在菲涅耳透鏡及柱狀透鏡面板上多所著墨。 睛參閱第2A至2E圖，其顯示一種習知具有黑色條紋之柱狀透 鏡面板的製作程序圖。首先，如第2A至2C圖所示，先提供一形 成有柱狀透鏡列112之面板114,接著在面板114平面上以滾壓式 技術（laminatingrolling)塗上一層紫外光硬化接著劑116，再利 用紫外光118垂直入射柱狀透鏡列112，因紫外光118經柱狀透鏡 列112聚焦後會於面板114平面上形成聚光區，因此，位於該聚 光區之部分產生光硬化作用後，該紫外光硬化接著劑施即被硬 化而失去接著的能力，崎枝區㈣其餘部分( 仍具有接著的能力。接著如第2_Ε圖所示，藉由滾^技術 而將包g月膠122的黑色層120貼附於該紫外光硬化接著劑 上，當拉開背膠122後’該紫外光硬化接著劑116仍具接著性的 遮蔽區域116b即黏著有黑色層12()，而形成構成遮光層馳之黑 色條紋124。 然而’此-黑色條紋124的製造方法需以滾壓式技術貼合該紫 外光硬化接著劑116、黑色層120等等的不同光學層，並需使用大 型的滾軋機具，此外’黑色條紋124的形成方式容易產生對準誤 差’於大尺寸硫的製作情況下往往無法精確鱗貼合。另，黑 色層120與背膠122分離時因為内聚力的作 愛、 色條請繼綱⑽·， 因此’當雜小減透鏡之_間距賤—步提高解析度的需求 1282481 時，上述製造誤差的影響將更為顯著。 【發明内容】 ^本發明之目的在於提供_歸投影祕製造方法，其可提高 背投影榮幕的對比及調整螢幕的增益值。 ， 根據本發明之—構想，該背投影跡製造方法之步驟包括提 供-第-換具和一第二模具，其中該第一模具具有複數個凹槽； 加=一不透光材料於該複數個凹槽内；以及於該第一模具和該第 , 之間注人―透光㈣’並經硬化和賴後，以形成-條紋 化之面杯。 、其中’該不透光材料較佳為黑色墨水、累色溶劑、黑色紫外 ，硬化膠、黑色光_或黑色材料。該不透光材料可藉由一感應 器、雷射偵查或圖案識別技術而辨·該每—凹槽的位置而加入 於該凹槽中。或者，細_為編水，藉由-噴墨技術 而塗抹於該凹槽内。 其中’該透储料為-樹脂或翻料級化膠。 此外’該背投影螢賴造方法更包括—步驟為形成—擴散層覆 於5亥不透储料____之凸__表面。另外，該 背投影螢幕製造方法更包括—步驟為形成—含有抗反射的保護層 該紐層和該倾層储由—賴猶形成。 供-其ΐ 1 _，該倾料幕製造方法之步驟包括提 ^-基板；提供-第—模具和—第二模具，其中該第—模具有複 數個凹槽’將-第—透光材料注人該第二模具内，雜合該基板， ⑤ 1282481 而於該基板上形成一柱狀部；加入一不透光材料於該複數個凹槽 内；以及將該具有柱狀部之基板壓合於該第一模具上，並經硬化 和脫膜後，以形成一條紋化之面板。 其中，該基板較佳為聚乙烯對苯二曱酸（PET)、聚乙烯（pvc)、 聚碳酸鹽（pc)或光學材質。而該第—透光材料較佳為一透明紫 外光硬化膠n透贿料注人該第二模具内並與該基板壓合 時，該製造方法更包括一以紫外光照射硬化之步驟。 此外，該背投影螢幕製造方法更包括一步驟為加入一第二透光 材料於該複數個凹槽内，並覆於該不透光材料之上，其中該第二 透光材料較佳為一透明紫外光硬化膠。 【實施方式】 請參閱第3 ® ’其顯林發明之背投影螢幕製作方法的第一 實施例。首先，先提供一具有複數個凹槽311之第一模具（或稱 為底模）31以及-具有複數個凹面柱形槽之第二模具（或稱為頂 模）33’兩相鄰之凹槽間具有一凸出區域312。將不透光材料或黑 色材料32注入於該底模之複數個凹槽311内，之後於該底模31 與該頂模33之間注入樹脂，壓模成型並硬化，形成複數個柱狀部 34，最後職細31與賴33雌，崎啦#私條紋之柱 狀透鏡面板成品3。 ~ 欲將黑色材料32注入於該底模之複數個凹槽311 0，可以注 射管逐步將該黑色材料32 (如黑色4水、黑色溶劑、黑色紫外光 硬化膠或黑^光_ (PhQtQresist))注人於每—凹槽内。由於 -般的感應器可以容錢酬凹槽並注人黑色材料於其中，此可 12 (§) 1282481 由自動化技術來完成。或者，藉由雷射偵查或圖案識別技術可辨 別出該凹槽的位置而塗抹適量的黑色材料，此亦可由噴墨技術 (Inject printing technology)來喷射墨水而完成塗抹。 另請參閱第4圖，其顯示本發明之背投影螢幕製作方法的第二 實施例。其以聚乙烯對苯二甲酸（PET)、聚乙烯（pvc)、聚碳酸 鹽（PC)或其他光學材質為基板41，並將一透明紫外光硬化膠注 入於具有複數個凹面柱形槽之第二模具42内，再壓上該基板41， 以紫外光照射硬化及脫膜後，於該基板41上形成複數個柱狀部招 而構成一柱狀透鏡列。另外，提供一具有複數個凹槽441之第一 模具44，將不透光材料或黑色材料45注入於該第一模具之複數個 凹槽441内約半滿後，再注入透明紫外光硬化膠妨，再壓上該具 有柱狀透鏡列43之基板41，壓模成型並硬化，最後將該第一模具 44脫模則寻到含有黑色條紋之柱狀透鏡面板成& 4。因該基板 41所使用之材料的光折射率與該透明紫外光硬化膠43的折射率 相近’故兩者之介面光學效用可以忽略。 經由上述實施例之製造方法所完成之含有黑色條紋的柱狀透 鏡面板3, 4 ’再經由滾壓技術將擴散層35和含有抗反射的保護層 36分別與柱狀透鏡面;^ 3, 4構裝一起，如第3和4圖所示。 本發明之製造方法所製成的含有黑色條紋之柱狀透鏡面板可 應用於背投電視榮幕上，以提升榮幕的對比及可調整螢幕的增益 值(gain)，並可簡化其製程及降低成本。 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 13 ⑤ 1282481 精神與齡，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】 第1A圖係顯不習知背投影絲之結構示意圖。 • 第1B圖為習知背投料幕之立體圖，以清楚顯示構成柱狀透 - 鏡面板之遮光層的黑色條紋。 第2A至2E圖為顯不具有該黑色條紋之柱狀透鏡面板的習知製 • 造方法之示意圖。 第4圖係顯示本發明之背投影螢幕製造方法之第二實施例。 第3圖係顯示本發明之背投影螢幕製造方法之第一實施例。 【主要元件符號說明】 100:背投影螢幕 102 :菲涅耳透鏡 104 ·柱狀透鏡面板 106 :光學鏡頭 104a :柱狀部 104b :遮光層 108 :黑色條紋 112 :柱狀透鏡列 114:基板 116 :紫外光硬化接著劑 118 :紫外光 116a :紫外光硬化接著劑 116b ··遮蔽區域 122 ·•背膠 120 :黑色層 124 :黑色條紋 311 :複數個凹槽 31 :第一模具 32 :黑色材料 33 :第二模具 3, 4 :柱狀透鏡面板成品 41 :基板 42 :第二模具 43 ·柱狀部 14 1282481 441 :凹槽 45 :黑色材料 35 :擴散層 34 :柱狀部 44 :第一模具 46 :透明紫外光硬化膠 36 :保護層1282481 IX. Description of the Invention: [Technical Field] The present invention relates to a method for manufacturing a rear projection screen, and more particularly to a rear projection screen manufacturing apparatus which can improve the rear projection ratio and increase the recording ratio. method. σ [Prior Art] : Please refer to 1A and 1B ® . It shows a schematic diagram of the conventional conventional rear projection screen 100. The rear projection screen 100 is mainly composed of both an ellipsoid lens lens 〇2 and a Lenticular iens sheet 1-4. The light output from the optical lens 106 can be refracted into parallel light after passing through the Fresnel lens 1〇2, and the parallel light is further refracted and focused by the lenticular portions 104a of the lenticular lens panel 1〇4. Finally, the hard surface of the light-shielding layer of the lenticular lens panel 104 is focused and imaged so that the human eye can see the image. The black strip 'pattern' of the light-shielding layer i 〇 4b constituting the lenticular lens panel 104 is used to clearly focus the above-mentioned parallel light on the surface of the panel 1 〇 4 into a strip-like pattern, so that the light is removed. Outside the concentrating area of the grain, other areas need to be covered with black stripe l 8 to form a light shielding layer. The function of the black stripe 1 〇 8 is to prevent internal stray light from scattering to the lenticular lens panel 104. The layers 1〇4b cause image aliasing, and can prevent external scattered light from being incident on the light shielding layer of the lenticular lens panel 104 to cause glare. In order to have better quality such as contrast (c〇ntrast rati〇), gain value of 1282481 (Gain), viewing angle, uniformity or avoiding ghosting, Mori stripes, etc., the improved techniques currently developed are in Frey Many inks are placed on the ear lens and the lenticular lens panel. Referring to Figures 2A through 2E, there is shown a fabrication sequence diagram of a conventional cylindrical lens panel having black stripes. First, as shown in FIGS. 2A to 2C, a panel 114 having a columnar lens array 112 is first provided, and then a layer of ultraviolet curing adhesive 116 is applied on the plane of the panel 114 by laminating rolling. The lenticular lens array 112 is perpendicularly incident by the ultraviolet light 118, and the ultraviolet light 118 is focused by the lenticular lens array 112 to form a condensing area on the plane of the panel 114. Therefore, after the photohardening effect occurs in the portion of the concentrating area, The UV-curing adhesive is hardened to lose the ability to carry out, and the rest of the Saki area (4) still has the ability to be followed. Then, as shown in Figure 2, the black of the gelatin 122 is covered by the rolling technique. The layer 120 is attached to the ultraviolet curing adhesive. After the adhesive 122 is pulled apart, the ultraviolet curing adhesive 116 still has an adhesive layer 116b adhered to the black layer 12 () to form a light shielding layer. Black stripe 124. However, the method of manufacturing the black stripe 124 requires a different roll of the UV-curable adhesive 116, the black layer 120, and the like, and requires a large rolling machine. ,this 'The formation of the black stripe 124 is prone to alignment errors'. In the case of large-size sulfur production, it is often impossible to accurately scale. In addition, when the black layer 120 is separated from the backing 122, the cohesive force is loved, and the color strip is selected (10). Therefore, the influence of the above manufacturing error will be more remarkable when the requirement of the resolution is increased by 1282481. [Invention] The object of the present invention is to provide a method for manufacturing a projection. , which can improve the contrast of the back projection glory and adjust the gain value of the screen. According to the present invention, the steps of the method for manufacturing the back projection trace include providing a - - a tool and a second mold, wherein the first The mold has a plurality of grooves; adding = an opaque material in the plurality of grooves; and between the first mold and the first portion, a light-transmitting (four)' is hardened and then formed to form - a striped face cup, wherein 'the opaque material is preferably a black ink, a red ink, a black ultraviolet, a hardened glue, a black light or a black material. The opaque material may be provided by an inductor, Laser Checking or pattern recognition technology to identify the position of each groove is added to the groove. Alternatively, the fine_ is a water-jet, which is applied to the groove by an ink-jet technique. The material is a resin or a graded rubber. In addition, the back projection method further comprises the steps of forming a diffusion layer overlying the surface of the __ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ The projection screen manufacturing method further comprises the steps of: forming a protective layer containing an anti-reflection layer and forming the layer of the tilt layer. The step of manufacturing the tilting screen comprises: a substrate; a first mold and a second mold, wherein the first mold has a plurality of grooves, and the first light-transmitting material is injected into the second mold to mix the substrate, 5 1282481 on the substrate Forming a columnar portion; adding an opaque material to the plurality of grooves; and pressing the substrate having the columnar portion on the first mold, and hardening and stripping to form a Striped panel. The substrate is preferably polyethylene terephthalic acid (PET), polyethylene (pvc), polycarbonate (pc) or an optical material. Preferably, the first light-transmitting material is a transparent ultraviolet light-curing adhesive, and the manufacturing method further comprises a step of hardening by ultraviolet light irradiation when the second mold is injected into the second mold and pressed into the substrate. In addition, the method for manufacturing the rear projection screen further includes a step of adding a second light transmissive material in the plurality of grooves and overlying the opaque material, wherein the second light transmissive material is preferably a Transparent UV light hardening glue. [Embodiment] Please refer to the first embodiment of the 3′′′'s rear projection screen manufacturing method of the invention. First, a first mold (or bottom mold) 31 having a plurality of grooves 311 and a second mold (or called a top mold) 33' having a plurality of concave cylindrical grooves are provided. There is a raised area 312 between the slots. An opaque material or a black material 32 is injected into the plurality of grooves 311 of the bottom mold, and then a resin is injected between the bottom mold 31 and the top mold 33, and is molded and hardened to form a plurality of columnar portions. 34, the final job fine 31 and Lai 33 female, Qia La # private striped cylindrical lens panel finished product 3. ~ To inject the black material 32 into the plurality of grooves 311 0 of the bottom mold, the black material 32 can be gradually formed by the injection tube (such as black 4 water, black solvent, black ultraviolet light hardening glue or black light light _ (PhQtQresist) ) Note in every groove. Since the general sensor can accommodate the recess and inject black material into it, this 12 (§) 1282481 is done by automation technology. Alternatively, an appropriate amount of black material may be applied by laser detection or pattern recognition technology to discern the position of the groove, which may also be inked by Inject printing technology to complete the application. Referring also to Fig. 4, there is shown a second embodiment of the method of fabricating the rear projection screen of the present invention. It is made of polyethylene terephthalic acid (PET), polyethylene (pvc), polycarbonate (PC) or other optical material as the substrate 41, and a transparent ultraviolet light hardening glue is injected into the plurality of concave cylindrical grooves. In the second mold 42, the substrate 41 is further pressed, and after hardening and stripping by ultraviolet light irradiation, a plurality of columnar portions are formed on the substrate 41 to form a columnar lens array. In addition, a first mold 44 having a plurality of grooves 441 is provided, and the opaque material or the black material 45 is injected into the plurality of grooves 441 of the first mold for about half full, and then the transparent ultraviolet light curing glue is injected. Alternatively, the substrate 41 having the lenticular lens array 43 is pressed, molded and hardened, and finally the first mold 44 is demolded to find a lenticular lens panel containing black stripes. Since the refractive index of the material used for the substrate 41 is close to the refractive index of the transparent ultraviolet light-curing adhesive 43, the optical effect of the interface between the two is negligible. The lenticular lens panel 3, 4' containing the black stripes completed by the manufacturing method of the above embodiment further applies the diffusion layer 35 and the anti-reflection-containing protective layer 36 to the lenticular lens surface via a rolling technique; ^ 3, 4 Construct together, as shown in Figures 3 and 4. The lenticular lens panel with black stripes produced by the manufacturing method of the present invention can be applied to the rear projection television glory to enhance the contrast of the glory screen and adjust the gain of the screen, and the process and the process can be simplified. cut costs. The above is intended to be illustrative only and not limiting. Any equivalent modifications or alterations to the spirit and age of the invention may be included in the scope of the appended claims. [Simple description of the diagram] Fig. 1A shows a schematic diagram of the structure of the back projection silk. • Figure 1B is a perspective view of a conventional rear projection screen to clearly show the black stripes that make up the light-shielding layer of the cylindrical transmissive panel. 2A to 2E are schematic views showing a conventional manufacturing method of a lenticular lens panel having such black stripes. Fig. 4 is a view showing a second embodiment of the method of manufacturing the rear projection screen of the present invention. Fig. 3 is a view showing a first embodiment of the method of manufacturing the rear projection screen of the present invention. [Description of Main Element Symbols] 100: Rear Projection Screen 102: Fresnel Lens 104 • Cylindrical Lens Panel 106: Optical Lens 104a: Columnar Part 104b: Light-Shielding Layer 108: Black Stripe 112: Cylindrical Lens Column 114: Substrate 116 : UV curing adhesive 118 : ultraviolet light 116a : ultraviolet curing adhesive 116b · shading area 122 · backing 120 : black layer 124 : black stripe 311 : a plurality of grooves 31 : first mold 32 : black material 33: second mold 3, 4: lenticular lens panel finished product 41: substrate 42: second mold 43 • columnar portion 14 1282481 441: groove 45: black material 35: diffusion layer 34: columnar portion 44: first Mold 46: Transparent UV curing adhesive 36: protective layer