201009437 九、發明說明： 【發明所屬之技術領域】 本發明係有關一種導光板的技術，特別是關於一種高光學解析度 之導光板及其製造方法。 【先前技術】 導光板在液晶顯示器的元件中，負責將經過燈源照射出的散亂， 不均的光線導正，以獲得均勻強度且垂直視界的光線亮度，而且導正 光線的導光板之光學圖案微結構，其間距在數微米間，解析度甚高， 所以導光板在液晶顯示器中的重要性是相當高的，因為若導光板的設 ® 計不良，就會進一步影響使用者的視力。 目前導光擴散板主要生產方式為高壓射出成型方式製造，但在高 壓射出成型時’因製程中高溫高壓且固化塑膠粒子溶化時流動性不 佳，造成射出成型後之光學紋路微結構產生缺陷，成品厚度過厚，成 品曲翹等種種問題，無法滿足精密微紋路結構成型的需求，且在實際 應用時，以上問題則轉變為光線集光效率不佳，顯示器產品輝度不足 等等問題。此外’若以熱壓印方式進行光學紋路微結構壓印複製，則 會易產生紋路複製率不良與不穩現象，同時會因製程中所造成的熱應 • 力致使導光板成品變形。 〇 因此，本發明係在針對上述之困擾，提出一種高光學解析度之導 光板的製造方法，其係可製作各微米範圍間的各式光學紋路微結構導 光板，並克服先前技術導光板製作時曲翹、光學紋路微結構解析度不 佳之問題。 【發明内容】 本發明之主要目的，在於提供一種高光學解析度之導光板及其製 造方法，其係可製作各微米範圍間的各式光學紋路微結構導光板，且 此導光板於製作完成時不會曲翹變形，可克服先前技術之導光板製作 時所面臨之問題。 201009437 本發明之另一目的，在於提供一種高光學解析度之導光板及其製 造方法，其係可以同時製造出具有光擴散與導光效果的高效率導光板。 為達上述目的’本發明提供一種高光學解析度之導光板，包含一 透明基板與一紫外線感光樹脂（uv-resin)層，紫外線感光樹脂層具有 光學圖案，並設於該透明基板上。 本發明亦提供一種高光學解析度之導光板的製造方法，首先提供 一透明基板，再於透明基板上形成一紫外線感光樹脂（uv_resjn)層， 將具有光學圖案之母膜與透明基板進行壓合，使紫外線感光樹脂層上 形成與該光學圖案對應之圖案，之後將紫外光照射於紫外線感光樹脂 參 層’使其固化’最後將此母膜脫離透明基板。 茲為使貴審查委員對本發明之結構特徵及所達成之功效更有進 一步之瞭解與認識，謹佐以較佳之實施例圖及配合詳細之說明，說明 如後： 【實施方式】 請參閱第1圖’本發明之導光板包含一透明基板1〇以及一紫外線 感光樹脂（uv-resin)層12 ’紫外線感光樹脂（uv_res|n)層12係具 有光學圖案，且紫外線感光樹脂層12設於透明基板1〇上，透明基板 10之材質可為聚曱基丙稀酸甲醋（PMMA)、聚碳酸醋(pc)、丙稀青 參 丁二烯苯乙稀(ABS)或聚苯乙稀(PS)，而紫外線感光樹脂層12之折射 率在1.5〜1.6之間。 參閱完第1圊之導光板結構之後，請繼續參閱其製造方法，如第 2(a)圖至第2(e)圖所示，首先如第2(a)圖所示，提供一透明基板。 接著如第2(b)圖所示，於透明基板1〇上形成一液態且厚度均勻的紫外 線感光樹脂層12，形成紫外線感光樹脂層12的方式可為網印(screen print)或柔印(flexo print)。再來如第2⑹圖所示，將具有光學圖案16 之透光母膜14與透明基板10進行壓合’使紫外線感光樹脂層12上 形成與光學圖案16對應之圖案，光學圖案16可為微溝切削狀（v_cut) 6 201009437 或微透鏡狀（micro-lens)，且光學圖案16的間距在大於0且小於或 等於100微米之間’另外透光母膜14之材質為塑膠材質，如聚甲基 丙烯酸甲酯（ΡΜΜΑ)、聚碳酸酯(ρ〇或聚乙烯對苯二甲酸酯（PET)， 其厚度為100-300微米。繼續如第2(d)圖所示，將紫外光由透光母膜 14端照射於該紫外線感光樹脂層12，以使其固化，因為透明基板1〇 厚度較厚，且透光性差，紫外光必須要由透光母膜14端照射才能達到 充分光照量固化的效果。最後如第2(e)圖所示，將透光母膜14脫離透 明基板10，就可以得到具高導光效率之導光板。 ❹201009437 IX. Description of the Invention: [Technical Field] The present invention relates to a technique of a light guide plate, and more particularly to a light guide plate of high optical resolution and a method of manufacturing the same. [Prior Art] In the components of the liquid crystal display, the light guide plate is responsible for guiding the scattered and uneven light that is irradiated through the light source to obtain the light intensity of the uniform intensity and the vertical field of view, and the light guide plate for guiding the light. The optical pattern microstructure has a high resolution between several micrometers, so the importance of the light guide plate in the liquid crystal display is quite high, because if the light guide plate is poorly designed, it will further affect the user's vision. . At present, the main production mode of the light-diffusing diffuser is high-pressure injection molding, but in the high-pressure injection molding, due to the high temperature and high pressure in the process and the poor fluidity of the solidified plastic particles, the optical grain microstructure after injection molding is defective. The thickness of the finished product is too thick, and the finished product is warped and the like, which cannot meet the requirements of the formation of the precise micro-grain road structure. In practical applications, the above problems are turned into poor light collection efficiency and insufficient brightness of the display product. In addition, if the optical grain microstructure is imprinted and reproduced by hot stamping, the grain reproduction rate is unfavorable and unstable, and the light guide plate is deformed due to the heat stress caused by the process. Therefore, the present invention has been made in view of the above problems, and provides a method for manufacturing a light guide plate with high optical resolution, which is capable of fabricating various optical grain microstructure light guide plates in various micrometer ranges, and overcomes the prior art light guide plate fabrication. The problem of poor resolution of the curved structure of the optical track and the optical texture. SUMMARY OF THE INVENTION The main object of the present invention is to provide a light guide plate with high optical resolution and a method for manufacturing the same, which can manufacture various optical grain microstructure light guide plates in various micrometer ranges, and the light guide plate is completed. It does not bend and deform, which can overcome the problems faced by the prior art light guide plate. 201009437 Another object of the present invention is to provide a light guide plate with high optical resolution and a method of manufacturing the same, which can simultaneously manufacture a high-efficiency light guide plate having light diffusion and light guiding effects. In order to achieve the above object, the present invention provides a light guide plate having a high optical resolution, comprising a transparent substrate and a UV-resin layer, wherein the ultraviolet photosensitive resin layer has an optical pattern and is disposed on the transparent substrate. The invention also provides a method for manufacturing a light guide plate with high optical resolution, firstly providing a transparent substrate, and then forming an ultraviolet photosensitive resin (uv_resjn) layer on the transparent substrate, and pressing the mother film with the optical pattern and the transparent substrate. A pattern corresponding to the optical pattern is formed on the ultraviolet photosensitive resin layer, and then ultraviolet light is irradiated onto the ultraviolet photosensitive resin layer to 'cure it' and finally the mother film is separated from the transparent substrate. For a better understanding and understanding of the structural features and the achievable effects of the present invention, please refer to the preferred embodiment and the detailed description, as follows: [Embodiment] Please refer to the first The light guide plate of the present invention comprises a transparent substrate 1 and a UV-resin layer 12'. The ultraviolet photosensitive resin (uv_res|n) layer 12 has an optical pattern, and the ultraviolet photosensitive resin layer 12 is provided in a transparent On the substrate 1 , the material of the transparent substrate 10 may be polyacrylic acid methyl acetonate (PMMA), polycarbonate (pc), acrylonitrile butadiene styrene (ABS) or polystyrene ( PS), and the refractive index of the ultraviolet photosensitive resin layer 12 is between 1.5 and 1.6. After referring to the structure of the light guide plate of the first step, please refer to the manufacturing method, as shown in Figures 2(a) to 2(e), first as shown in Figure 2(a), providing a transparent substrate. . Next, as shown in FIG. 2(b), a liquid and uniform thickness ultraviolet photosensitive resin layer 12 is formed on the transparent substrate 1 to form a UV-ray photosensitive resin layer 12 by screen printing or flexo printing ( Flexo print). Further, as shown in FIG. 2(6), the light-transmissive mother film 14 having the optical pattern 16 is pressed against the transparent substrate 10, and a pattern corresponding to the optical pattern 16 is formed on the ultraviolet-ray photosensitive resin layer 12. The optical pattern 16 may be micro- Groove cutting shape (v_cut) 6 201009437 or micro-lens, and the spacing of the optical pattern 16 is greater than 0 and less than or equal to 100 micrometers. 'The material of the transparent light-transmissive mother film 14 is plastic material, such as poly Methyl methacrylate (ruthenium), polycarbonate (ρ〇 or polyethylene terephthalate (PET), thickness 100-300 microns. Continue to be as shown in Figure 2(d), UV light The ultraviolet light-sensitive photosensitive resin layer 12 is irradiated from the end of the light-transmitting mother film 14 to be solidified. Since the thickness of the transparent substrate 1 is thick and the light transmittance is poor, the ultraviolet light must be irradiated by the end of the light-transmitting mother film 14 to be sufficient. The effect of curing the amount of light. Finally, as shown in Fig. 2(e), the light-transmitting mother film 14 is separated from the transparent substrate 10, and a light guide plate having high light guiding efficiency can be obtained.
請參閱第1圓舆第3囷，第3圈為本發明之導光板的另一實施例， 其與第1圚的差異為紫外線感光樹脂層12不但具有光學圖案，且在其 中添加有特定濃度與特定大小之複數擴散粒子2〇，使擴散粒子2〇舆 紫外線感光樹脂層12 —起設於透明基板1〇上，使導光板更具有光擴 散效果。 ' 參閱完第3圖之導光板結構之後，請輯參閱其製造方法，如第 4(a)圖至第4(e)_示’首先如第4⑻騎示，提供—透明基板1〇。 接著如第4(b)圖所心於透明基板10上形成一液態且厚度均勻的紫外 線感光樹脂層12，並在料顧細脂層12巾添加特妨度與特定 大小之複數擴散粒子20’使㈣粒子2〇與料線感光触層12 一起 形成於透明基板10上。接著第4⑹BJ至第4咖之製作方法就如同第 2⑹圖至第2_，已於前面敘述過了，因此不再贅t如此進行下 去，最後餅具域散與料纽率之導输。請參閱第3圖 與第5圖，第5圖為本發明之導光板的再—實施例，其差 異為在透明基板1〇與料_鎌脂層12之 」| ^明之反射層22，該反射層22可為金屬層或油墨層，=== 板在經由光線照射下，顯出反射層22之形狀與光澤了。 守70 另外此種導光板亦可將擴散粒子2〇去除， 二 的功效，也是-種可實施之導光板。去除也不會影響反射層22 7 201009437 參閲完第5圓之導光板結構之後，請賴參閱其製造方法，如 6(a)圖至第6(g)®所示，首先如第6⑻圓所示，提供-透明基板1〇。 接著如第6(b)囷所*，於透明基板10上形成反射層22。再來如第6⑹ 圖所示，於反射層22上形成-液態且厚度均勻的紫外線感光樹脂層 12,並在紫外線感光樹脂層12中添加特定濃度與特定大小之複數擴散 粒子20’使擴散粒子20與紫外線感光樹脂層12 一起形成於透明基板 1〇與反射層22上。接著第6(d)圖至第⑽圓之製作方法就如同第4⑹ 圖至第4(e)圓，已於前面敘述過了，因此不再贅述。如此進行下去， 最後就可以得到更加實用之導光板。 β 若要形成不具擴散粒子20之導光板，只要在上述方式中，省略第 6(c)圖中所示步驟裡添加擴散粒子2〇之動作，即可得到不具擴散粒子 2〇之導光板。 本發明可應用於顯示器的背光模組中，如第7圖所示，此圈為背 光模組中部分的結構，且導光板之結構係以第三種實施例為例，然而， 本發明之任一實施例都可應用於背光模組中，當光經由光源24射出 後’會射入導光板中，光線經由導光板反射會反射到反射片26上之 後光線經由導光板與反射片26的影響，會使得光線均勻地往上射出。 另外如第8圓所示，此圖亦為背光模組中部分的結構，其與第7 參圖差異的地方在於，反射片替換成金屬層28，且設置在導光板上，當 光經由光源24射出後，會射入導光板中，光線經由導光板反射會反射 到金屬層28上。 綜上所述，本發明不但可製作在大於〇且小於或等於各微米範圍 間的各式光學紋路微結構導光板，並克服先前技術之導光板製作時曲 翹、光學紋路微結構解析度不佳之問題，又能同時製造出具有光擴散 與導光效果的高效率導光板，是一相當實用的發明。 以上所述者’僅為本發明一較佳實施例而已，並非用來限定本發 明實施之範圍’故舉凡依本發明申請專利範圍所述之形狀、構造、特 8 201009437 徵及精神所為之均等變化與修飾，均應包括於本發明之申請專利範圍 内。 【圖式簡單說明】 第1圖為本發明之導光板結構示意圖。 第2⑻圖至第2⑹圖為本發明製作導光板之各步驟示意圖。 第3圓為本發明之另一導光板結構示意圖β 第4(a)圖至第4(e)圖為本發明製作另一導光板之各步驟示意圖。 第5圖為本發明之再一導光板結構示意圖。 第6(a)圈至第6(f)圖為本發明製作再一導光板之各步称示意圏。 ❹ 第7圖為本發明之一導光板應用於背光模組的示意結構圖。 第8圖為本發明之另一導光板應用於背光模組的示意結構圖。 【主要元件符號說明】 10透明基板 12紫外線感光樹脂層 14透光母膜 16光學圖案 18抗反射層 20擴散粒子 22反射層 24光源 26反射片 28金屬層 ❹ 9Referring to FIG. 1 , the third ring is another embodiment of the light guide plate of the present invention, which differs from the first one in that the ultraviolet photosensitive resin layer 12 has an optical pattern and a specific concentration is added thereto. The diffusing particles 2 are dispersed on the transparent substrate 1 to form a plurality of diffusing particles of a specific size, so that the light guiding plate has a light diffusing effect. After referring to the structure of the light guide plate in Fig. 3, please refer to the manufacturing method, as shown in Fig. 4(a) to Fig. 4(e)_shower. First, as shown in the 4th (8th), the transparent substrate 1〇 is provided. Then, as shown in FIG. 4(b), a liquid and uniform thickness ultraviolet photosensitive resin layer 12 is formed on the transparent substrate 10, and a plurality of diffusion particles 20' having a specific degree and a specific size are added to the thin layer 12 of the thinner layer. The (4) particles 2A are formed on the transparent substrate 10 together with the strand photosensitive layer 12. Then, the method of making the 4th (6)th BJ to the 4th coffee is as described in the second (6) to the second _, which has been described above, so that it is no longer carried out in this way, and finally the cake has a domain and a feed rate. Please refer to FIG. 3 and FIG. 5 . FIG. 5 is a re-embodiment of the light guide plate of the present invention, and the difference is that the reflective layer 22 of the transparent substrate 1 and the material 镰 层 12 layer The reflective layer 22 can be a metal layer or an ink layer, and the === plate exhibits the shape and gloss of the reflective layer 22 under illumination. Shou 70 This kind of light guide plate can also remove the diffusion particles 2〇, and the effect of the second is also an implementable light guide plate. Removal does not affect the reflective layer 22 7 201009437 After referring to the structure of the 5th circle of light guide, please refer to its manufacturing method, as shown in 6(a) to 6(g)®, first as the 6th (8) circle As shown, a transparent substrate 1 is provided. Next, as shown in the sixth (b), the reflective layer 22 is formed on the transparent substrate 10. Further, as shown in FIG. 6(6), an ultraviolet photosensitive resin layer 12 having a liquid state and a uniform thickness is formed on the reflective layer 22, and a plurality of diffusion particles 20' having a specific concentration and a specific size are added to the ultraviolet photosensitive resin layer 12 to diffuse the particles. 20 is formed on the transparent substrate 1 and the reflective layer 22 together with the ultraviolet photosensitive resin layer 12. Next, the production method of the sixth (d) to the (10th) circle is like the fourth (6) to the fourth (e) circle, which has been described above, and therefore will not be described again. In this way, you can get a more practical light guide. β To form a light guide plate having no diffusion particles 20, in the above-described manner, the operation of adding the diffusion particles 2〇 in the step shown in Fig. 6(c) is omitted, and a light guide plate having no diffusion particles 2〇 can be obtained. The present invention can be applied to a backlight module of a display. As shown in FIG. 7, the ring is a part of the structure of the backlight module, and the structure of the light guide plate is exemplified by the third embodiment. However, the present invention Any of the embodiments can be applied to the backlight module. When the light is emitted through the light source 24, the light is incident on the light guide plate, and the light is reflected by the light guide plate to be reflected on the reflective sheet 26, and then the light passes through the light guide plate and the reflective sheet 26. The effect will cause the light to shoot up evenly. In addition, as shown in the eighth circle, this figure is also a part of the structure of the backlight module, and the difference from the seventh reference figure is that the reflection sheet is replaced with the metal layer 28 and is disposed on the light guide plate when the light passes through the light source. After being emitted, the film 24 is incident on the light guide plate, and the light is reflected by the light guide plate to be reflected on the metal layer 28. In summary, the present invention can not only fabricate various optical grain microstructure light guide plates in a range of more than 〇 and less than or equal to each micrometer, and overcomes the prior art light guide plate fabrication time, the optical texture microstructure resolution is not A good practical problem is that it can simultaneously produce a high-efficiency light guide plate with light diffusion and light guiding effects. The above description is only a preferred embodiment of the present invention and is not intended to limit the scope of the present invention. Therefore, the shape and structure described in the scope of the patent application of the present invention are equivalent to the spirit and spirit of the 2010. Variations and modifications are intended to be included within the scope of the invention. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic view showing the structure of a light guide plate of the present invention. 2(8) to 2(6) are schematic views showing steps of fabricating a light guide plate according to the present invention. The third circle is a schematic view of another light guide plate of the present invention. The fourth through the fourth (a) to (b)th drawings are schematic views of the steps of fabricating another light guide plate according to the present invention. Figure 5 is a schematic view showing the structure of another light guide plate of the present invention. 6(a) to 6(f) are schematic diagrams showing the steps of making a further light guide plate according to the present invention. ❹ Figure 7 is a schematic structural view of a light guide plate applied to a backlight module of the present invention. FIG. 8 is a schematic structural view of another light guide plate of the present invention applied to a backlight module. [Main component symbol description] 10 transparent substrate 12 ultraviolet photosensitive resin layer 14 transparent mother film 16 optical pattern 18 anti-reflection layer 20 diffusion particle 22 reflection layer 24 light source 26 reflection sheet 28 metal layer ❹ 9